- Open Access
How do we choose the best donor for T-cell-replete, HLA-haploidentical transplantation?
© Chang et al. 2016
- Received: 22 February 2016
- Accepted: 3 April 2016
- Published: 12 April 2016
In haploidentical stem cell transplantations (haplo-SCT), nearly all patients have more than one donor. A key issue in the haplo-SCT setting is the search for the best donor, because donor selection can significantly impact the incidences of acute and chronic graft-versus-host disease, transplant-related mortality, and relapse, in addition to overall survival. In this review, we focused on factors associated with transplant outcomes following unmanipulated haplo-SCT with anti-thymocyte globulin (ATG) or after T-cell-replete haplo-SCT with post-transplantation cyclophosphamide (PT/Cy). We summarized the effects of the primary factors, including donor-specific antibodies against human leukocyte antigens (HLA); donor age and gender; killer immunoglobulin-like receptor-ligand mismatches; and non-inherited maternal antigen mismatches. We also offered some expert recommendations and proposed an algorithm for selecting donors for unmanipulated haplo-SCT with ATG and for T-cell-replete haplo-SCT with PT/Cy.
- Unmanipulated haploidentical stem cell transplantation
- Donor-specific anti-human leukocyte antigen antibody
- Natural killer alloreactivity
- Non-inherited maternal antigen mismatch
Recent informative trials and results of T-cell-replete haploidentical stem cell transplantation
Reference, year, ref, and median age
ANC median (range)
PLT median (range)
Unmanipulated haplo-SCT with ATG
Di Bartolomeo P, et al.  (37)
17 % at 2 yr
36 % at 3 yr
21 % at 1 yr
38 % at 3 yr
45 % at 3 yr
Wang Y, et al.  (25)
G-BM + G-PB
17 % at 3 yr
17 % at 3 yr
67 % at 3 yr
70 % at 3 yr
Luo Y, et al.  (25)
41.4 % at 2 yr
30.5 % at 5 yr
14.2 % at 5 yr
58.3 % at 5 yr
60.8 % at 5 yr
Gao L, et al.  (25.4)
G-PB + G-BM
15.4 % at 2 yr
84.6 % at 2 yr
Peccatori J, et al.  (48)
47 % at 2 yr
31 % at 3 yr
48 % at 3 yr
20 % at 3 yr
25 % at 3 yr
Shin SH, et al.  (48)
23.3 % at 2 yr
34.8 % at 2 yr
41.9 % at 2 yr
46.6 % at 2 yr
Yahng SA, et al.  (41)
12.2 % at 2 yr
26.6 % at 2 yr
61.1 % at 2 yr
66 % at 2 yr
Lin X, et al.  (23)
24.1 % at 2 yr
30.5 % at 3 yr
21.9 % at 3 yr
41.1 % at 3 yr
50.6 % at 3 yr
TCR haplo-SCT with PT/Cy
Raiola AM, et al.  (45)
18 % at 1000 days
43 % at 4 yr
52 % at 4 yr
McCurdy SR, et al.  (55)
32 % at 6 m
13 % at 2 yr
11 % at 1 yr
46 % at 3 yr
40 % at 3 yr
50 % at 3 yr
Bacigalupo A, et al.  (47)
20 % at 2 yr
14 % at 4 yr
27 % at 4 yr
77 % for CR1
49 % for CR2
38 % for AD
Solomon SR, et al.  (46)
3 % at 2 yr
24 % at 2 yr
73 % at 2 yr
78 % at 2 yr
Cieri N, et al.  (55)
20 % at 1 yr
17 % at 1 yr
35 % at 1 yr
48 % at 1 yr
56 % at 1 yr
Esteves I, et al.  (17)
SS-BM (13) G-PB (3)
32.9 % at 1 yr
67.1 % at 1 yr
Ciurea SO, et al.  (NA)
SS-BM (85) G-PB (19)
30 % at 3 yr
14 % at 3 yr
44 % at 3 yr
45 % at 3 yr
SS-BM (77) G-PB (11)
34 % at 3 yr
9 % at 3 yr
58 % at 3 yr
46 % at 3 yr
Kasamon YL, et al.  (61)
33 % at 6 m
12 % at 1 yr
10 % at 1 yr
46 % at 3 yr
37 % at 3 yr
46 % at 3 yr
Before the year 2000, patients that received haplo-SCT had relatively poor transplant outcomes, due to the use of conditioning and GVHD prophylaxis regimens that were similar to those used for transplantations from HLA-matched donors [73, 74]. Anasetti et al.  found that the degree of recipient HLA incompatibility was associated with the incidence of severe acute GVHD. Indeed, survival decreased as the degree of HLA disparity increased. Szydlo et al.  showed that, among patients with early leukemia that received transplantations, the relative risks of treatment failure were 2.43 and 3.79, when related donors had one and two mismatched HLA loci, respectively, compared to when donors were HLA-matched siblings (the reference group). Among patients with more advanced leukemia that received transplantations, differences in treatment failure were less striking; the relative risks of treatment failure were 1.22 and 1.81, when related donors had one and two HLA antigen mismatches, respectively, compared to the reference group. These data suggested that clinical outcomes depend on the degree of HLA mismatching in the early stages of haplo-SCT, because of little knowledge on immune tolerance and less approaches to overcome the HLA barriers.
Over the last 10 years, haplo-SCT outcomes have substantially improved, due to the development of novel GVHD prophylaxis strategies, improved supportive care strategies, and application of new strategies for relapse prophylaxis and treatment (Table 1) [18, 19, 28, 36, 42, 62, 75–77]. In 2006, a group at the University of Peking reported that the cumulative incidences of acute and chronic GVHD were comparable among patients with one-, two-, or three-locus mismatches, when treated with unmanipulated haploidentical blood and marrow transplantations and an ATG conditioning regimen . They also demonstrated that HLA mismatching had no effect on other transplantation outcomes, including relapse, leukemia-free survival (LFS), and OS . These results were confirmed by researchers from Peking University [9–12] and other transplantation centers in China [14, 35, 78]. Kasamon et al.  confirmed the findings by Huang et al., when they showed that greater HLA disparity did not appear to worsen the overall outcome after non-myeloablative haploidentical bone marrow transplantation with a high-dose PT/Cy. In a prospective, multicenter phase I/II study on unmanipulated haplo-SCTs performed in five institutions in Japan, Ikegame et al.  reported that HLA disparity was not associated with GVHD, TRM, relapse, or survival. Similar results were observed in recent updated reports on haplo-SCT with TCD or TCR [34, 35, 62, 72].
In an unmanipulated haplo-SCT protocol, Huang et al.  found that the HLA-B + DR combination mismatch was an independent risk factor for grades II–III and III–IV acute GVHD in patients with chronic myeloid leukemia (CML). Huo et al.  demonstrated that the HLA-B mismatch was also an independent risk factor for acute GVHD and TRM in patients with hematological diseases. However, SCT is not a first-line treatment option for patients with CML; therefore, associations between specific HLA-locus mismatches and haplo-SCT outcomes should be prospectively investigated in other hematological diseases.
In summary, studies on unmanipulated haplo-SCT with ATG [1, 52–55] or with PT/Cy [1, 36, 58, 59] showed that HLA disparity did not impact outcome. However, for donor selection, some specific HLA-loci profiles remain to be explored. Nevertheless, more attention has been focused on how donor-related, non-HLA variables affect clinical outcomes.
Variables considered for best donor selection in unmanipulated haplo-SCT with ATG or TCR haplo-SCT with PT/Cy
Unmanipulated haplo-SCT with ATG
TCR haplo-SCT with PT/Cy
DSA was associated with primary graft failure, including GR and PGF.
DSA was associated with an increased risk of graft failure.
Young donor age (<30) was associated with decreased 2–4 acute GVHD, NRM, and superior survival.
No effect of donor age on clinical outcomes was found.
F-M (versus others) correlated with higher incidence of 2–4 acute GVHD.
Male donors were associated with less NRM and better survival.
KIR-ligand mismatch was associated with inferior survival.
A survival benefit associated with donor-recipient mismatches of inhibitory KIR and KIR haplotype B donors.
NIMA-mismatched was associated with a lower incidence of acute GVHD in unmanipulated haplo-SCT.
Type of donor
Children donors were associated with less acute GVHD than sibling donors.
Maternal donors were associated with more acute GVHD, chronic GVHD, and NRM.
Older sister donors were inferior to father donors in NRM and survival.
Father donors were associated with less acute GVHD, less NRM, and better survival than mother donors.
The contribution of DSAs to the pathophysiology of graft failure (GF) has been confirmed in MUDT and in umbilical cord blood transplantation (UCBT) [91, 92]. In TCD haplo-SCT settings, Ciurea et al.  reported that three of four patients (75 %) that tested positive for pretransplant DSA (mean fluorescence intensity, MFI > 1500) failed to engraft, compared to 1 out of 20 patients (5 %) that tested DSA negative (P = 0.008), among 24 consecutive patients. In a study of 296 candidates for unmanipulated haplo-SCT with PT/Cy, the overall incidence of DSA was 15 %. Gladstone et al.  also found that DSA was associated with an increased risk of graft failure after transplantation. More recently, Chang et al.  reported that DSAs (MFI ≥ 10,000) were correlated to primary graft rejection (GR, P < 0.001) and that DSAs (MFI ≥ 2000) were strongly associated with poor graft function (PGF) in patients that received unmanipulated haplo-SCT with ATG. They also showed that primary GF, including GR and PGF, was associated with a significant increase in the incidence of TRM and with reduced DFS and OS [12, 20]. For patients with DSA, it is necessary to select a different donor. However, there is no generally accepted cutoff value for the mean fluorescence intensity of DSA in unmanipulated haplo-SCT with ATG [1, 52–55] or with PT/Cy [1, 36, 58, 59]. Overall, the association between DSA and graft failure was confirmed, both in TCD and in TCR haplo-SCT settings [12, 81, 82]. When a patient is positive for DSA (for example, DSA MFI ≥ 2000 in the Peking University Institute of Hematology), but the donor cannot be changed, a therapy must be given to target the DSA.
Currently in HSCT settings, desensitization methods have been applied, including plasma exchange, intravenous immunoglobulin, rituximab, and bortezomib [94, 95]. However, the efficacy of these strategies remains uncertain, due to the overall small number of patients treated and to the overall poor understanding of the mechanisms underlying DSA-mediated GF and PGF. Further elucidation of these mechanisms is essential to obtain critical insights into how desensitization approaches can be modified and what immuno-modifying therapies can be applied. That information will facilitate improvements in haplo-SCT outcomes.
In summary, DSA must be incorporated into the algorithm for haploidentical donor selection in unmanipulated haplo-SCT, with either the ATG or the PT/Cy modality. Therapies that target DSA might improve clinical outcomes for patients that are DSA positive and have only one haploidentical donor.
In haplo-SCT with TCD, no effects of donor age were observed on transplant outcomes. In unmanipulated haplo-SCT, Wang et al.  found that transplants from younger donors (age ≤30 years) showed less non-relapse mortality (NRM) and better survival than those from older donors. In previous studies, we found that a high dose of CD34+ cells in haplo-allografts could promote platelet engraftment, and that CD3+CD4−CD8− T cells might contribute to a lower incidence of acute GVHD [96, 97]. More recently, researchers from Peking University also demonstrated that a young donor age (≤30 years) was associated with a higher count of CD34+ cells, CD3+CD4−CD8− T cells, and monocytes in G-BM, G-PB, and mixed allografts of G-BM and G-PB . The impact of donor age was also confirmed by researchers from Korea in unmanipulated haplo-SCT with ATG . They found that donor age (>40 years) was associated with a higher incidence of grades II–IV acute GVHD. More recently, Jaiswal et al.  reported that age-related clonal hematopoiesis was commonly associated with increases in hematologic cancer risk and all-cause mortality. Those findings strongly argued for the benefit of selecting younger donors to minimize transfers of clonal hematopoiesis .
In summary, younger donors are preferred in unmanipulated haplo-SCT, with ATG or PT/Cy.
For female donors, in general, age is correlated with parity. Older multiparous women may be the least-preferred donors for male recipients, due to the higher incidence of GVHD and the lower OS reported in some studies that focused on unrelated donor transplantations [101, 102]. Donor gender (female versus male) had adverse effects on the incidence of grades II–IV acute GVHD, both in unmanipulated haplo-SCT with PT/Cy and in TCR haplo-SCT with an ATG-based conditioning regimen [14, 36, 103]. Interestingly, in the largest study, the Peking University group showed that transplants from male donors were associated with significantly less NRM and better survival .
In summary, a male donor is preferred in unmanipulated haplo-SCT with ATG or with PT/Cy, due to the potential for superior survival.
In both HLA-matched and HLA-mismatched settings, allogeneic SCT that involves a major ABO incompatibility requires mononuclear cell separation to prevent a hemolytic reaction. This procedure reduces the transplanted cell dose and may increase the likelihood of graft failure [104, 105]. When possible, transplant donors should not be selected when they have major ABO incompatibilities, to avoid graft manipulations that might reduce the nucleated cell dose, particularly the CD34+ cell dose . Our experience at Peking University showed that a low number of CD34+ cells (less than 2.19 × 106/kg) in the allograft was a critical factor associated with delayed platelet engraftment after unmanipulated haploidentical transplantation, in either adult or pediatric patients . Those results suggested that, when no ABO-compatible donor was available, a donor with a minor ABO mismatch was preferable to a donor with a major mismatch, because the former was less likely to affect the number of hematopoietic stem cells infused. Thus, ensuring an adequate CD34+ cell dose in the allograft is the first step in promoting engraftment and decreasing the incidence of graft failure.
In summary, ABO compatibility should be considered when selecting the best donor in haplo-SCT with TCR; the order of selection should be ABO compatible, a minor ABO mismatch, and a major ABO mismatch.
Killer immunoglobulin-like receptor mismatches and NK cell alloreactivity
Biology of NK cells
NK cells play a central role in viral immunity and tumor immune surveillance. The activity of NK cells is regulated by a balance between activating and inhibiting killer immunoglobulin-like receptors (KIRs) . KIRs are inherited as one of two basic KIR haplotypes, termed group A and group B. Group A haplotypes have a fixed number of genes that encode inhibitory receptors (with the exception of the activating receptor, KIR2DS4). Group B haplotypes have a variable number of genes, including additional activating receptor genes [84, 85].
Because KIR and HLA class I genes segregate to different chromosomes, a tolerance mechanism is required to prohibit the development of autoreactive NK cells. Only NK cells that express inhibitory receptors for self-HLA class I can acquire full functional competence, a process referred to as “education” or “licensing” . In contrast, potentially autoreactive NK cells remain in a hyporesponsive state. Thus, NK cells that are “licensed” or “educated” (highly responsive to non-self cells) express inhibitory KIRs that specifically recognize self-HLA ligands [107, 108]. Examples of inhibitory KIRs include the well-defined KIR2DL2/3, specific for the HLA-Cw group-1 epitope; KIR2DL1, specific for the HLA-Cw group-2 epitope, and KIR3DL1, specific for the HLA-Bw4 epitope . Thus, when educated NK cells confront an allogeneic target, their KIR does not recognize the allogeneic HLA as an inhibitory self-HLA ligand; the lack of the inhibitory ligand mediates NK “alloreactivity” (they attack cells that lack self-recognition molecules) [109–112]. In fact, alloreactive NK cells must only express KIRs that do not engage with any HLA class 1 molecules present on allogeneic target cells. Moreover, for effective alloreactivity, NK cells must also lack expression of CD94/NKG2A, because its inhibitory ligand, HLA-E, is present on all HLA class I-positive cells [87, 113, 114].
Role of NK cell alloreactivity in haplo-SCT
Ruggeri et al.  showed that alloreactive NK cells in a mouse model provided the following benefits: (1) elimination of recipient acute myeloid leukemia (AML) cells; (2) destruction of recipient T cells, which permitted a conditioning regimen with reduced toxicity; and (3) ablation of recipient dendritic cells that trigger GVHD, which protected the recipient from GVHD. In this study, the authors also found that increased NK cell alloreactivity in humans, based on the “missing self” model, was associated with a decreased rate of relapse and improved survival in patients with AML but not in patients with ALL. However, Symons et al.  failed to demonstrate a positive effect of alloreactive NK cells in patients that received haplo-SCT with PT/Cy. In contrast, Huang et al.  showed that a high relapse rate following haplo-SCT was associated with missing self molecules or missing ligands in the hosts.
The discordant results mentioned above may reflect differences in NK functional recovery, determined by the licensing process under different haplo-SCT settings, and/or differences in the presence of T cells in the stem cell graft. More interestingly, the researchers in Huang’s group demonstrated that the host MHC class I could determine NK cell responses, following unmanipulated haplo-SCT with ATG [11, 23]. The functional recovery of donor-derived NK cells was higher in recipients that expressed ligands for donor inhibitory KIRs, and high functional NK recovery correlated with better relapse control. Those results were consistent with previous studies, which suggested that T cells may influence NK cell function via presentation of MHC. Although it remains to be determined by what mechanism(s) the presence of T cells in the allograft influence NK cell licensing, they appear to be clinically relevant. Moreover, NK licensing was observed to have extremely relevant clinical implications, such as relapse and survival.
Symons et al.  showed that, in haplo-SCT with PT/Cy, patients with the KIR AA haplotype exhibited significantly higher OS and EFS, when the donor had a KIR Bx haplotype (mismatched) rather than the KIR AA haplotype (matched). In haplo-SCT with negative depletion of CD3/CD19 in allografts, the relapse incidence was significantly reduced in patients with a haplotype B donor, both in adults with hematological malignancies  and in children with ALL . However, this phenomenon was not observed in the Perugia or the Peking University protocols, which suggested that the benefit of using donors with KIR B haplotypes was only observed with specific haplo-SCT modalities; however, the mechanisms underlying this phenomenon warrant further study.
In summary, NK cell alloreactivity and KIR haplotype should be considered when choosing the best donor. For patients that receive unmanipulated haplo-SCT with ATG, the best donor will have matching KIR expression. For patients that receive TCR haplo-SCT with PT/Cy, the best donor should have at least one KIR B haplotype.
Recently, Araki et al.  demonstrated that the number of cells that produced interferon-γ (IFN-γ) was significantly lower in a NIMA-exposed tolerance group than in a sensitization group, according to an MLR-ELISPOT assay in a murine model. That study raised the possibility that assays for measuring IFN-γ production in response to NIMA might be used clinically to predict the benefit of using NIMA-mismatched donors.
In summary, NIMA mismatching should be incorporated into the algorithm for selecting donors in unmanipulated haplo-SCT with ATG. The order of donor eligibility is first, NIMA mismatches, and second, NIPA mismatches.
Given the fact that parents, children, siblings, and collateral relatives are all potential haploidentical donors [9, 16, 19, 22], the effects of these variables on clinical outcomes were investigated by several groups [1, 10, 70]. In unmanipulated haplo-SCT with ATG, results from Huang et al.’s group in Beijing demonstrated that transplants donated by fathers were associated with less NRM, less acute GVHD, and better survival compared to those donated by mothers . Transplants donated by children were associated with less acute GVHD than those donated by siblings. Transplants donated by older sisters were inferior to those donated by fathers, with regard to NRM and survival. Moreover, transplants donated by mothers were associated with significantly more acute and chronic GVHD and TRM than NIMA-mismatched, but not NIPA-mismatched, transplants donated by siblings . However, Stern et al.  observed a survival advantage in patients with ALL or AML that received TCD-allografts from haploidentical maternal donors. The above-mentioned opposite results in the two studies may be related to differences in the conditioning regimens, GVHD prophylaxis, and allografts between the two groups [10, 70]. Zhang et al.  found that, when haplo-SCT was performed with collateral-related haploidentical donors (CRDs) or with immediate-related donors (IRDs), the 3-year probability of OS and LFS was similar, but the 2-year incidence of extensive chronic GVHD was significantly higher with CRDs than with IRDs (36.7 % versus 20.2 %, P = 0.03) . The effects of donor-recipient relationships (parents or siblings) on TRM and LFS were also confirmed in patients with AML that received haplo-SCT with TCD .
In summary, the family relationship of a donor should be incorporated in the algorithm for selecting the best donor in unmanipulated haplo-SCT with ATG. The order of donor eligibility among relatives should be child, younger brother, older sister, father, mother, and a collateral relative .
The effects of donor and recipient serum CMV status on clinical outcomes were demonstrated in HLA-matched transplantation settings . Considering the effects of CMV status on outcomes [19, 69, 123], a group from Johns Hopkins  suggested that donors should have a CMV IgG serologic status similar to that of recipients. However, Wang et al. [9, 10] found that donor-recipient CMV serostatus matching was not associated with transplant outcomes. This discrepancy may be related to the higher incidence of CMV infections in Chinese compared to Western populations. Therefore, the effects of donor and recipient CMV status on haplo-SCT outcomes should be evaluated in a prospective, multicenter study.
In summary, donor and recipient CMV serostatus should be considered when choosing the best donor in unmanipulated haplo-SCT, particularly when patients receive haplo-SCT with PT/Cy; however, further study is needed to confirm the findings.
HLA matching: The effects of HLA disparity on transplantation outcomes has vanished, due to the improved approaches of unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
Donor-specific antibodies: DSA must be incorporated in the algorithm for haploidentical donor selection, both in unmanipulated haplo-SCT with ATG and in haplo-SCT with PT/Cy. Procedures to reduce DSA prior to transplantation should be considered for patients that have DSA against potential haploidentical donors.
ABO compatibility: ABO compatibility should be considered in both unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
Serum CMV status: Among haploidentical donors, donor and recipient CMV serostatus should be considered, in both unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
Donor age: Among haploidentical donors, young males should be considered optimal, in both unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
Family relationship: Family relationships should be considered in unmanipulated haplo-SCT with ATG-based conditioning, with the following order of donor preference: child, younger brother, older sister or father, older sibling, mother, and collateral relatives.
NIMA mismatches: NIMA mismatching should be incorporated into the algorithm for donor selection in unmanipulated haplo-SCT with the ATG protocol. The order of donor eligibility should be NIMA mismatches, followed by NIPA mismatches.
NK cell alloreactivity: NK cell alloreactivity should be considered in choosing a donor for both unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
According to these recommendations, we have proposed an algorithm for haploidentical donor selection (Fig. 1). When choosing the best haploidentical donor, one should keep the following caveats in mind. First, there is not a generally accepted haplo-SCT protocol that can be used in all transplant centers; therefore, a single variable (such as NK alloreactivity) may have different effects on clinical outcomes in patients that receive different haplo-SCT protocols [10, 19, 34, 36, 59, 70, 72, 77, 100, 125]. Second, with improvements in haplo-SCT modalities, the impact of some variables (such as HLA-locus mismatches) on transplant outcomes may vanish. Third, with increasing numbers of haplo-SCT cases, and with updated analyses of donor-related variables associated with transplant outcomes, some new factors may emerge [126, 127].
Presently, TCR haplo-SCT modalities, particularly unmanipulated haplo-SCT with ATG or haplo-SCT with PT/Cy, have been widely accepted as a viable alternative for patients with no HLA-identical donor [1, 5, 6, 9, 10, 34–36, 72, 77, 128, 129]. Despite the challenges in promoting hematopoietic engraftment, in enhancing GVL effects, and in the lack of one universal haplo-SCT modality for most transplant centers, current evidence has indicated that selecting a best donor can improve transplant outcomes [10, 36, 59, 77, 81, 82, 115, 116, 130]. Therefore, employment of the currently available factors, including DSA, donor age, KIR-ligand mismatching, and NIMA mismatching, for guiding treatment is an accepted option in most centers [10, 36, 59, 77, 82, 100, 115, 116, 130]. Many recent excellent studies have advocated that donor selection should be incorporated into clinical trials. Although much work remains to be done, such as who is the best donor in subgroup patients (for example, high-risk AML), we believe that the best donor should be selected according to currently available knowledge, in combination with individualized conditioning regimens , optimal allografts , and stratification-directed GVHD prophylaxis, relapse prophylaxis, and treatment [131, 132]. This selection strategy will improve transplant outcomes, both in unmanipulated haplo-SCT with ATG and haplo-SCT with PT/Cy.
This work was supported (in part) by the National High Technology Research and Development Program of China (Program 863) (Grant No. 2013AA020401), the Milstein Medical Asian American Partnership Foundation, The Key Program of the National Natural Science Foundation of China (Grant No. 81230013), the Scientific Research Foundation for Capital Medicine Development (Grant No. 2011-4022-08), and the National Cancer Institute of the National Institutes of Health (CA 015396), USA. We would also like to thank San Francisco Edit (www.sefedit.net) for assistance in editing this manuscript.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
- Kanakry CG, Fuchs EJ, Luznik L. Modern approaches to HLA-haploidentical blood or marrow transplantation. Nat Rev Clin Oncol. 2016;13(2):132.PubMedView ArticleGoogle Scholar
- Arai Y, Aoki K, Takeda J, et al. Clinical significance of high-dose cytarabine added to cyclophosphamide/total-body irradiation in bone marrow or peripheral blood stem cell transplantation for myeloid malignancy. J Hematol Oncol. 2015;8:102.PubMedPubMed CentralView ArticleGoogle Scholar
- Baron F, Labopin M, Ruggeri A, et al. Unrelated cord blood transplantation for adult patients with acute myeloid leukemia: higher incidence of acute graft-versus-host disease and lower survival in male patients transplanted with female unrelated cord blood—a report from Eurocord, the Acute Leukemia Working Party, and the Cord Blood Committee of the Cellular Therapy and Immunobiology Working Party of the European Group for Blood and Marrow Transplantation. J Hematol Oncol. 2015;8(1):107.PubMedPubMed CentralView ArticleGoogle Scholar
- Baron F, Zachee P, Maertens J, et al. Non-myeloablative allogeneic hematopoietic cell transplantation following fludarabine plus 2 Gy TBI or ATG plus 8 Gy TLI: a phase II randomized study from the Belgian Hematological Society. J Hematol Oncol. 2015;8:4.PubMedPubMed CentralView ArticleGoogle Scholar
- Chang YJ, Huang XJ. Haploidentical bone marrow transplantation without T-cell depletion. Semin Oncol. 2012;39(6):653–63.PubMedView ArticleGoogle Scholar
- Chang YJ, Huang XJ. Haploidentical hematopoietic stem cell transplantation with unmanipulated granulocyte colony stimulating factor mobilized marrow and blood grafts. Curr Opin Hematol. 2012;19(6):454–61.PubMedView ArticleGoogle Scholar
- Lai YR, Chen YH, Hu DM, et al. Multicenter phase II study of a combination of cyclosporine a, methotrexate and mycophenolate mofetil for GVHD prophylaxis: results of the Chinese Bone Marrow Transplant Cooperative Group (CBMTCG). J Hematol Oncol. 2014;7:59.PubMedPubMed CentralView ArticleGoogle Scholar
- Reisner Y, Hagin D, Martelli MF. Haploidentical hematopoietic transplantation: current status and future perspectives. Blood. 2011;118(23):6006–17.PubMedView ArticleGoogle Scholar
- Wang Y, Liu DH, Liu KY, et al. Long-term follow-up of haploidentical hematopoietic stem cell transplantation without in vitro T cell depletion for the treatment of leukemia: nine years of experience at a single center. Cancer. 2013;119(5):978–85.PubMedView ArticleGoogle Scholar
- Wang Y, Chang YJ, Xu LP, et al. Who is the best donor for a related HLA haplotype-mismatched transplant? Blood. 2014;124(6):843–50.PubMedView ArticleGoogle Scholar
- Huang XJ, Zhao XY, Liu DH, Liu KY, Xu LP. Deleterious effects of KIR ligand incompatibility on clinical outcomes in haploidentical hematopoietic stem cell transplantation without in vitro T-cell depletion. Leukemia. 2007;21(4):848–51.PubMedGoogle Scholar
- Chang YJ, Zhao XY, Xu LP, et al. Donor-specific anti-human leukocyte antigen antibodies were associated with primary graft failure after unmanipulated haploidentical blood and marrow transplantation: a prospective study with randomly assigned training and validation sets. J Hematol Oncol. 2015;8:84.PubMedPubMed CentralView ArticleGoogle Scholar
- Handgretinger R. Haploidentical transplantation: the search for the best donor. Blood. 2014;124(6):827–8.PubMedPubMed CentralView ArticleGoogle Scholar
- Luo Y, Xiao H, Lai X, et al. T-cell-replete haploidentical HSCT with low-dose anti-T-lymphocyte globulin compared with matched sibling HSCT and unrelated HSCT. Blood. 2014;124(17):2735–43.PubMedPubMed CentralView ArticleGoogle Scholar
- Martelli MF, Di Ianni M, Ruggeri L, et al. “Designed” grafts for HLA-haploidentical stem cell transplantation. Blood. 2014;123(7):967–73.PubMedView ArticleGoogle Scholar
- Ciurea SO, Bayraktar UD. “No donor”? Consider a haploidentical transplant. Blood Rev. 2015;29(2):63–70.PubMedPubMed CentralView ArticleGoogle Scholar
- Gorin NC, Labopin M, Piemontese S, et al. T-cell-replete haploidentical transplantation versus autologous stem cell transplantation in adult acute leukemia: a matched pair analysis. Haematologica. 2015;100(4):558–64.PubMedPubMed CentralView ArticleGoogle Scholar
- Mancusi A, Ruggeri L, Urbani E, et al. Haploidentical hematopoietic transplantation from KIR ligand-mismatched donors with activating KIRs reduces non-relapse mortality. Blood. 2015;125(20):3173–82.PubMedView ArticleGoogle Scholar
- Peccatori J, Forcina A, Clerici D, et al. Sirolimus-based graft-versus-host disease prophylaxis promotes the in vivo expansion of regulatory T cells and permits peripheral blood stem cell transplantation from haploidentical donors. Leukemia. 2015;29(2):396–405.PubMedView ArticleGoogle Scholar
- Sun YQ, He GL, Chang YJ, et al. The incidence, risk factors, and outcomes of primary poor graft function after unmanipulated haploidentical stem cell transplantation. Ann Hematol. 2015;94(10):1699–705.PubMedView ArticleGoogle Scholar
- Sun YQ, Wang J, Jiang Q, et al. Haploidentical hematopoietic SCT may be superior to conventional consolidation/maintenance chemotherapy as post-remission therapy for high-risk adult ALL. Bone Marrow Transplant. 2015;50(1):20–5.PubMedView ArticleGoogle Scholar
- Wang Y, Liu QF, Xu LP, et al. Haploidentical vs identical-sibling transplant for AML in remission: a multicenter, prospective study. Blood. 2015;125(25):3956–62.PubMedView ArticleGoogle Scholar
- Zhao XY, Chang YJ, Zhao XS, et al. Recipient expression of ligands for donor inhibitory KIRs enhances NK-cell function to control leukemic relapse after haploidentical transplantation. Eur J Immunol. 2015;45(8):2396–408.PubMedView ArticleGoogle Scholar
- Chang YJ, Huang XJ. Haploidentical SCT: the mechanisms underlying the crossing of HLA barriers. Bone Marrow Transplant. 2014;49(7):873–9.PubMedView ArticleGoogle Scholar
- Xiao-Jun H, Lan-Ping X, Kai-Yan L, et al. Partially matched related donor transplantation can achieve outcomes comparable with unrelated donor transplantation for patients with hematologic malignancies. Clin Cancer Res. 2009;15(14):4777–83.PubMedView ArticleGoogle Scholar
- Or-Geva N, Reisner Y. The evolution of T-cell depletion in haploidentical stem-cell transplantation. Br J Haematol. 2016;172(5):667–84.PubMedView ArticleGoogle Scholar
- Shabbir-Moosajee M, Lombardi L, Ciurea SO. An overview of conditioning regimens for haploidentical stem cell transplantation with post-transplantation cyclophosphamide. Am J Hematol. 2015;90(6):541–8.PubMedView ArticleGoogle Scholar
- Bertaina A, Merli P, Rutella S, et al. HLA-haploidentical stem cell transplantation after removal of alphabeta + T and B-cells in children with non-malignant disorders. Blood. 2014;124(5):822–6.PubMedView ArticleGoogle Scholar
- Shin SH, Kim JH, Jeon YW, et al. Feasible outcomes of T cell-replete haploidentical stem cell transplantation with reduced-intensity conditioning in patients with myelodysplastic syndrome. Biol Blood Marrow Transplant. 2015;21(2):342–9.PubMedView ArticleGoogle Scholar
- Wang Z, Zheng X, Yan H, Li D, Wang H. Good outcome of haploidentical hematopoietic SCT as a salvage therapy in children and adolescents with acquired severe aplastic anemia. Bone Marrow Transplant. 2014;49(12):1481–5.PubMedView ArticleGoogle Scholar
- Yan CH, Jiang Q, Wang J, et al. Superior survival of unmanipulated haploidentical hematopoietic stem cell transplantation compared with chemotherapy alone used as post-remission therapy in adults with standard-risk acute lymphoblastic leukemia in first complete remission. Biol Blood Marrow Transplant. 2014;20(9):1314–21.PubMedView ArticleGoogle Scholar
- Zecca M, Strocchio L, Pagliara D, et al. HLA-haploidentical T cell-depleted allogeneic hematopoietic stem cell transplantation in children with Fanconi anemia. Biol Blood Marrow Transplant. 2014;20(4):571–6.PubMedView ArticleGoogle Scholar
- Esteves I, Bonfim C, Pasquini R, et al. Haploidentical BMT and post-transplant Cy for severe aplastic anemia: a multicenter retrospective study. Bone Marrow Transplant. 2015;50(5):685–9.PubMedView ArticleGoogle Scholar
- Huang W, Li H, Gao C, et al. Unmanipulated HLA-mismatched/haploidentical peripheral blood stem cell transplantation for high-risk hematologic malignancies. Transfusion. 2012;52(6):1354–62.PubMedView ArticleGoogle Scholar
- Wang M, Dong YJ, Qiu ZX, et al. HLA disparity is not crucial for the survival rate and severity of chronic health conditions in adult recipients following family donor hematopoietic stem cell transplantation. Int J Hematol. 2015;101(1):75–82.PubMedView ArticleGoogle Scholar
- McCurdy SR, Kanakry JA, Showel MM, et al. Risk-stratified outcomes of nonmyeloablative HLA-haploidentical BMT with high-dose posttransplantation cyclophosphamide. Blood. 2015;125(19):3024–31.PubMedPubMed CentralView ArticleGoogle Scholar
- Bacigalupo A, Dominietto A, Ghiso A, et al. Unmanipulated haploidentical bone marrow transplantation and post-transplant cyclophosphamide for hematologic malignancies following a myeloablative conditioning: an update. Bone Marrow Transplant. 2015;50:S37–9.PubMedView ArticleGoogle Scholar
- Raiola AM, Dominietto A, di Grazia C, et al. Unmanipulated haploidentical transplants compared with other alternative donors and matched sibling grafts. Biol Blood Marrow Transplant. 2014;20(10):1573–9.PubMedView ArticleGoogle Scholar
- Gao L, Zhang C, Gao L, et al. Favorable outcome of haploidentical hematopoietic stem cell transplantation in Philadelphia chromosome-positive acute lymphoblastic leukemia: a multicenter study in Southwest China. J Hematol Oncol. 2015;8:90.PubMedPubMed CentralView ArticleGoogle Scholar
- Ballen KK, Koreth J, Chen YB, Dey BR, Spitzer TR. Selection of optimal alternative graft source: mismatched unrelated donor, umbilical cord blood, or haploidentical transplant. Blood. 2012;119(9):1972–80.PubMedView ArticleGoogle Scholar
- Luznik L, O’Donnell PV, Fuchs EJ. Post-transplantation cyclophosphamide for tolerance induction in HLA-haploidentical bone marrow transplantation. Semin Oncol. 2012;39(6):683–93.PubMedView ArticleGoogle Scholar
- Martelli MF, Di Ianni M, Ruggeri L, et al. HLA-haploidentical transplantation with regulatory and conventional T-cell adoptive immunotherapy prevents acute leukemia relapse. Blood. 2014;124(4):638–44.PubMedView ArticleGoogle Scholar
- Ciurea SO, Mulanovich V, Saliba RM, et al. Improved early outcomes using a T cell replete graft compared with T cell depleted haploidentical hematopoietic stem cell transplantation. Biol Blood Marrow Transplant. 2012;18(12):1835–44.PubMedPubMed CentralView ArticleGoogle Scholar
- Huang XJ, Zhu HH, Chang YJ, et al. The superiority of haploidentical related stem cell transplantation over chemotherapy alone as postremission treatment for patients with intermediate- or high-risk acute myeloid leukemia in first complete remission. Blood. 2012;119(23):5584–90.PubMedView ArticleGoogle Scholar
- Mo XD, Xu LP, Zhang XH, et al. Haploidentical hematopoietic stem cell transplantation in adults with Philadelphia-negative acute lymphoblastic leukemia: no difference in the high- and low-risk groups. Int J Cancer. 2015;136(7):1697–707.PubMedView ArticleGoogle Scholar
- Sun YQ, Xu LP, Zhang XH, et al. A retrospective comparison of BU-fludarabine and BU-CY regimens in elderly patients or in patients with comorbidities who received unmanipulated haploidentical hematopoietic SCT. Bone Marrow Transplant. 2015;50(4):601–3.PubMedView ArticleGoogle Scholar
- Rutella S, Zavala F, Danese S, Kared H, Leone G. Granulocyte colony-stimulating factor: a novel mediator of T cell tolerance. J Immunol. 2005;175(11):7085–91.PubMedView ArticleGoogle Scholar
- Jun HX, Jun CY, Yu ZX. In vivo induction of T-cell hyporesponsiveness and alteration of immunological cells of bone marrow grafts using granulocyte colony-stimulating factor. Haematologica. 2004;89(12):1517–24.PubMedGoogle Scholar
- Lv M, Zhao XS, Hu Y, et al. Monocytic and promyelocytic myeloid-derived suppressor cells may contribute to G-CSF-induced immune tolerance in haplo-identical allogeneic hematopoietic stem cell transplantation. Am J Hematol. 2015;90(1):E9–E16.PubMedView ArticleGoogle Scholar
- Franzke A, Piao W, Lauber J, et al. G-CSF as immune regulator in T cells expressing the G-CSF receptor: implications for transplantation and autoimmune diseases. Blood. 2003;102(2):734–9.PubMedView ArticleGoogle Scholar
- D’Aveni M, Rossignol J, Coman T, et al. G-CSF mobilizes CD34+ regulatory monocytes that inhibit graft-versus-host disease. Sci Transl Med. 2015;7(281):281ra242.Google Scholar
- Huang XJ, Liu DH, Liu KY, et al. Haploidentical hematopoietic stem cell transplantation without in vitro T-cell depletion for the treatment of hematological malignancies. Bone Marrow Transplant. 2006;38(4):291–7.PubMedView ArticleGoogle Scholar
- Huang XJ, Liu DH, Liu KY, et al. Treatment of acute leukemia with unmanipulated HLA-mismatched/haploidentical blood and bone marrow transplantation. Biol Blood Marrow Transplant. 2009;15(2):257–65.PubMedView ArticleGoogle Scholar
- Lu DP, Dong L, Wu T, et al. Conditioning including antithymocyte globulin followed by unmanipulated HLA-mismatched/haploidentical blood and marrow transplantation can achieve comparable outcomes with HLA-identical sibling transplantation. Blood. 2006;107(8):3065–73.PubMedView ArticleGoogle Scholar
- Huang XJ, Chang YJ. Unmanipulated HLA-mismatched/haploidentical blood and marrow hematopoietic stem cell transplantation. Biol Blood Marrow Transplant. 2011;17(2):197–204.PubMedView ArticleGoogle Scholar
- Lee KH, Lee JH, Kim DY, et al. Reduced-intensity conditioning therapy with busulfan, fludarabine, and antithymocyte globulin for HLA-haploidentical hematopoietic cell transplantation in acute leukemia and myelodysplastic syndrome. Blood. 2011;118(9):2609–17.PubMedView ArticleGoogle Scholar
- Di Bartolomeo P, Santarone S, De Angelis G, et al. Haploidentical, unmanipulated, G-CSF-primed bone marrow transplantation for patients with high-risk hematologic malignancies. Blood. 2013;121(5):849–57.PubMedView ArticleGoogle Scholar
- Luznik L, O’Donnell PV, Symons HJ, et al. HLA-haploidentical bone marrow transplantation for hematologic malignancies using nonmyeloablative conditioning and high-dose, posttransplantation cyclophosphamide. Biol Blood Marrow Transplant. 2008;14(6):641–50.PubMedPubMed CentralView ArticleGoogle Scholar
- Kasamon YL, Luznik L, Leffell MS, et al. Nonmyeloablative HLA-haploidentical bone marrow transplantation with high-dose posttransplantation cyclophosphamide: effect of HLA disparity on outcome. Biol Blood Marrow Transplant. 2010;16(4):482–9.PubMedPubMed CentralView ArticleGoogle Scholar
- Zhang YY, Liu DH, Liu KY, et al. HLA-haploidentical hematopoietic SCT from collateral related donors without in vitro T-cell depletion for hematological malignancies. Bone Marrow Transplant. 2014;49(4):496–501.PubMedView ArticleGoogle Scholar
- Solomon SR, Sizemore CA, Sanacore M, et al. TBI-based myeloablative haploidentical stem cell transplantation is a safe and effective alternative to unrelated donor transplantation in patients without matched sibling donors. Biol Blood Marrow Transplant. 2015;21(7):1299–307.PubMedView ArticleGoogle Scholar
- Ciurea SO, Zhang MJ, Bacigalupo AA, et al. Haploidentical transplant with post-transplant cyclophosphamide versus matched unrelated donor transplant for acute myeloid leukemia. Blood. 2015;126(8):1033–40.PubMedView ArticleGoogle Scholar
- Kasamon YL, Bolanos-Meade J, Prince GT, et al. Outcomes of nonmyeloablative HLA-haploidentical blood or marrow transplantation with high-dose post-transplantation cyclophosphamide in older adults. J Clin Oncol. 2015;33(28):3152–61.PubMedView ArticleGoogle Scholar
- Cieri N, Greco R, Crucitti L, et al. Post-transplantation cyclophosphamide and sirolimus after haploidentical hematopoietic stem cell transplantation using a treosulfan-based myeloablative conditioning and peripheral blood stem cells. Biol Blood Marrow Transplant. 2015;21(8):1506–14.PubMedView ArticleGoogle Scholar
- Ciceri F, Lupo-Stanghellini MT, Korthof ET. Haploidentical transplantation in patients with acquired aplastic anemia. Bone Marrow Transplant. 2013;48(2):183–5.PubMedView ArticleGoogle Scholar
- Gao L, Li Y, Zhang Y, et al. Long-term outcome of HLA-haploidentical hematopoietic SCT without in vitro T-cell depletion for adult severe aplastic anemia after modified conditioning and supportive therapy. Bone Marrow Transplant. 2014;49(4):519–24.PubMedView ArticleGoogle Scholar
- El-Cheikh J, Crocchiolo R, Furst S, et al. Unrelated cord blood compared with haploidentical grafts in patients with hematological malignancies. Cancer. 2015;121(11):1809–16.PubMedView ArticleGoogle Scholar
- Kekre N, Antin JH. Hematopoietic stem cell transplantation donor sources in the 21st century: choosing the ideal donor when a perfect match doesn’t exist. Blood. 2014;124(3):334–43.PubMedView ArticleGoogle Scholar
- Ciceri F, Labopin M, Aversa F, et al. A survey of fully haploidentical hematopoietic stem cell transplantation in adults with high-risk acute leukemia: a risk factor analysis of outcomes for patients in remission at transplantation. Blood. 2008;112(9):3574–81.PubMedView ArticleGoogle Scholar
- Stern M, Ruggeri L, Mancusi A, et al. Survival after T cell-depleted haploidentical stem cell transplantation is improved using the mother as donor. Blood. 2008;112(7):2990–5.PubMedPubMed CentralView ArticleGoogle Scholar
- Moscardo F, Romero S, Sanz J, et al. T cell-depleted related HLA-mismatched peripheral blood stem cell transplantation as salvage therapy for graft failure after single unit unrelated donor umbilical cord blood transplantation. Biol Blood Marrow Transplant. 2014;20(7):1060–3.PubMedView ArticleGoogle Scholar
- Wang Y, Fu HX, Liu DH, et al. Influence of two different doses of antithymocyte globulin in patients with. standard-risk disease following haploidentical transplantation: a randomized trial. Bone Marrow Transplant. 2014;49(3):426–33.PubMedView ArticleGoogle Scholar
- Anasetti C, Beatty PG, Storb R, et al. Effect of HLA incompatibility on graft-versus-host disease, relapse, and survival after marrow transplantation for patients with leukemia or lymphoma. Hum Immunol. 1990;29(2):79–91.PubMedView ArticleGoogle Scholar
- Szydlo R, Goldman JM, Klein JP, et al. Results of allogeneic bone marrow transplants for leukemia using donors other than HLA-identical siblings. J Clin Oncol. 1997;15(5):1767–77.PubMedGoogle Scholar
- Chang YJ, Zhao XY, Huang XJ. Immune reconstitution after haploidentical hematopoietic stem cell transplantation. Biol Blood Marrow Transplant. 2014;20(4):440–9.PubMedView ArticleGoogle Scholar
- Mo XD, Zhao XY, Liu DH, et al. Umbilical cord blood transplantation and unmanipulated haploidentical hematopoietic SCT for pediatric hematologic malignances. Bone Marrow Transplant. 2014;49(8):1070–5.PubMedView ArticleGoogle Scholar
- Ikegame K, Yoshida T, Yoshihara S, et al. Unmanipulated haploidentical reduced-intensity stem cell transplantation using fludarabine, busulfan, low-dose antithymocyte globulin, and steroids for patients in non-complete remission or at high risk of relapse: a prospective multicenter phase I/II study in Japan. Biol Blood Marrow Transplant. 2015;21(8):1495–505.PubMedView ArticleGoogle Scholar
- Lin X, Lu ZG, Song CY, et al. Long-term outcome of HLA-haploidentical hematopoietic stem cell transplantation without in vitro T-cell depletion based on an FBCA conditioning regimen for hematologic malignancies. Bone Marrow Transplant. 2015;50(8):1092–7.PubMedView ArticleGoogle Scholar
- Xiao-Jun H, Lan-Ping X, Kai-Yan L, et al. HLA-mismatched/haploidentical hematopoietic stem cell transplantation without in vitro T cell depletion for chronic myeloid leukemia: improved outcomes in patients in accelerated phase and blast crisis phase. Ann Med. 2008;40(6):444–55.PubMedView ArticleGoogle Scholar
- Huo MR, Xu LP, Li D, et al. The effect of HLA disparity on clinical outcome after HLA-haploidentical blood and marrow transplantation. Clin Transplant. 2012;26(2):284–91.PubMedView ArticleGoogle Scholar
- Yoshihara S, Maruya E, Taniguchi K, et al. Risk and prevention of graft failure in patients with preexisting donor-specific HLA antibodies undergoing unmanipulated haploidentical SCT. Bone Marrow Transplant. 2012;47(4):508–15.PubMedView ArticleGoogle Scholar
- Ciurea SO, de Lima M, Cano P, et al. High risk of graft failure in patients with anti-HLA antibodies undergoing haploidentical stem-cell transplantation. Transplantation. 2009;88(8):1019–24.PubMedPubMed CentralView ArticleGoogle Scholar
- Wang Y-T, Zhao X-Y, Zhao X-S, et al. The impact of donor characteristics on the immune cell composition of mixture allografts of granulocyte-colony-stimulating factor-mobilized marrow harvests and peripheral blood harvests. Transfusion. 2015;55(12):2874–81.PubMedView ArticleGoogle Scholar
- Uhrberg M, Valiante NM, Shum BP, et al. Human diversity in killer cell inhibitory receptor genes. Immunity. 1997;7(6):753–63.PubMedView ArticleGoogle Scholar
- Parham P. MHC class I molecules and KIRs in human history, health and survival. Nat Rev Immunol. 2005;5(3):201–14.PubMedView ArticleGoogle Scholar
- Moretta L, Locatelli F, Pende D, Marcenaro E, Mingari MC, Moretta A. Killer Ig-like receptor-mediated control of natural killer cell alloreactivity in haploidentical hematopoietic stem cell transplantation. Blood. 2011;117(3):764–71.PubMedView ArticleGoogle Scholar
- Aoyama K, Koyama M, Matsuoka K, et al. Improved outcome of allogeneic bone marrow transplantation due to breastfeeding-induced tolerance to maternal antigens. Blood. 2009;113(8):1829–33.PubMedView ArticleGoogle Scholar
- Ichinohe T, Uchiyama T, Shimazaki C, et al. Feasibility of HLA-haploidentical hematopoietic stem cell transplantation between noninherited maternal antigen (NIMA)-mismatched family members linked with long-term fetomaternal microchimerism. Blood. 2004;104(12):3821–8.PubMedView ArticleGoogle Scholar
- Matsuoka K, Ichinohe T, Hashimoto D, Asakura S, Tanimoto M, Teshima T. Fetal tolerance to maternal antigens improves the outcome of allogeneic bone marrow transplantation by a CD4+ CD25+ T-cell-dependent mechanism. Blood. 2006;107(1):404–9.PubMedView ArticleGoogle Scholar
- van Rood JJ, Loberiza Jr FR, Zhang MJ, et al. Effect of tolerance to noninherited maternal antigens on the occurrence of graft-versus-host disease after bone marrow transplantation from a parent or an HLA-haploidentical sibling. Blood. 2002;99(5):1572–7.PubMedView ArticleGoogle Scholar
- Spellman S, Bray R, Rosen-Bronson S, et al. The detection of donor-directed, HLA-specific alloantibodies in recipients of unrelated hematopoietic cell transplantation is predictive of graft failure. Blood. 2010;115(13):2704–8.PubMedPubMed CentralView ArticleGoogle Scholar
- Cutler C, Kim HT, Sun L, et al. Donor-specific anti-HLA antibodies predict outcome in double umbilical cord blood transplantation. Blood. 2011;118(25):6691–7.PubMedPubMed CentralView ArticleGoogle Scholar
- Gladstone DE, Zachary AA, Fuchs EJ, et al. Partially mismatched transplantation and human leukocyte antigen donor-specific antibodies. Biol Blood Marrow Transplant. 2013;19(4):647–52.PubMedPubMed CentralView ArticleGoogle Scholar
- Yoshihara S, Taniguchi K, Ogawa H, Saji H. The role of HLA antibodies in allogeneic SCT: is the ‘type-and-screen’ strategy necessary not only for blood type but also for HLA? Bone Marrow Transplant. 2012;47(12):1499–506.PubMedView ArticleGoogle Scholar
- Jordan SC, Vo AA. Donor-specific antibodies in allograft recipients: etiology, impact and therapeutic approaches. Curr Opin Organ Transplant. 2014;19(6):591–7.PubMedView ArticleGoogle Scholar
- Chang YJ, Xu LP, Liu DH, et al. Platelet engraftment in patients with hematologic malignancies following unmanipulated haploidentical blood and marrow transplantation: effects of CD34+ cell dose and disease status. Biol Blood Marrow Transplant. 2009;15(5):632–8.PubMedView ArticleGoogle Scholar
- Chang YJ, Xu LP, Liu DH, et al. The impact of CD34+ cell dose on platelet engraftment in pediatric patients following unmanipulated haploidentical blood and marrow transplantation. Pediatr Blood Cancer. 2009;53(6):1100–6.PubMedView ArticleGoogle Scholar
- Chen L, Chang YJ, Xu LP, et al. The impact of donor characteristics on the immune cell composition of second allografts in Chinese people. Vox Sang. 2016 Feb 25. doi: 10.1111/vox.12394. [Epub ahead of print].
- Jaiswal S, Fontanillas P, Flannick J, et al. Age-related clonal hematopoiesis associated with adverse outcomes. N Engl J Med. 2014;371(26):2488–98.PubMedPubMed CentralView ArticleGoogle Scholar
- Ciurea SO, Champlin RE. Donor selection in T cell-replete haploidentical hematopoietic stem cell transplantation: knowns, unknowns, and controversies. Biol Blood Marrow Transplant. 2013;19(2):180–4.PubMedPubMed CentralView ArticleGoogle Scholar
- Kongtim P, Di Stasi A, Rondon G, et al. Can a female donor for a male recipient decrease the relapse rate for patients with acute myeloid leukemia treated with allogeneic hematopoietic stem cell transplantation? Biol Blood Marrow Transplant. 2015;21(4):713–9.PubMedPubMed CentralView ArticleGoogle Scholar
- Stern M, Brand R, de Witte T, et al. Female-versus-male alloreactivity as a model for minor histocompatibility antigens in hematopoietic stem cell transplantation. Am J Transplant. 2008;8(10):2149–57.PubMedView ArticleGoogle Scholar
- Piemontese S, Ciceri F, Labopin M, et al. A survey on unmanipulated haploidentical hematopoietic stem cell transplantation in adults with acute leukemia. Leukemia. 2015;29(5):1069–75.PubMedView ArticleGoogle Scholar
- Guttridge MG, Sidders C, Booth-Davey E, Pamphilon D, Watt SM. Factors affecting volume reduction and red blood cell depletion of bone marrow on the COBE Spectra cell separator before haematopoietic stem cell transplantation. Bone Marrow Transplant. 2006;38(3):175–81.PubMedView ArticleGoogle Scholar
- Gajewski JL, Johnson VV, Sandler SG, Sayegh A, Klumpp TR. A review of transfusion practice before, during, and after hematopoietic progenitor cell transplantation. Blood. 2008;112(8):3036–47.PubMedPubMed CentralView ArticleGoogle Scholar
- Vivier E, Raulet DH, Moretta A, et al. Innate or adaptive immunity? The example of natural killer cells. Science. 2011;331(6013):44–9.PubMedPubMed CentralView ArticleGoogle Scholar
- Orr MT, Lanier LL. Natural killer cell education and tolerance. Cell. 2010;142(6):847–56.PubMedPubMed CentralView ArticleGoogle Scholar
- Joncker NT, Raulet DH. Regulation of NK cell responsiveness to achieve self-tolerance and maximal responses to diseased target cells. Immunol Rev. 2008;224:85–97.PubMedPubMed CentralView ArticleGoogle Scholar
- Ruggeri L, Mancusi A, Capanni M, et al. Donor natural killer cell allorecognition of missing self in haploidentical hematopoietic transplantation for acute myeloid leukemia: challenging its predictive value. Blood. 2007;110(1):433–40.PubMedPubMed CentralView ArticleGoogle Scholar
- Ruggeri L, Capanni M, Urbani E, et al. Effectiveness of donor natural killer cell alloreactivity in mismatched hematopoietic transplants. Science. 2002;295(5562):2097–100.PubMedView ArticleGoogle Scholar
- Moretta A, Vitale M, Bottino C, et al. P58 molecules as putative receptors for major histocompatibility complex (MHC) class I molecules in human natural killer (NK) cells. Anti-p58 antibodies reconstitute lysis of MHC class I-protected cells in NK clones displaying different specificities. J Exp Med. 1993;178(2):597–604.PubMedView ArticleGoogle Scholar
- Karre K. Natural killer cell recognition of missing self. Nat Immunol. 2008;9(5):477–80.PubMedView ArticleGoogle Scholar
- Costello RT, Sivori S, Marcenaro E, et al. Defective expression and function of natural killer cell-triggering receptors in patients with acute myeloid leukemia. Blood. 2002;99(10):3661–7.PubMedView ArticleGoogle Scholar
- Bottino C, Castriconi R, Moretta L, Moretta A. Cellular ligands of activating NK receptors. Trends Immunol. 2005;26(4):221–6.PubMedView ArticleGoogle Scholar
- Symons HJ, Leffell MS, Rossiter ND, Zahurak M, Jones RJ, Fuchs EJ. Improved survival with inhibitory killer immunoglobulin receptor (KIR) gene mismatches and KIR haplotype B donors after nonmyeloablative, HLA-haploidentical bone marrow transplantation. Biol Blood Marrow Transplant. 2010;16(4):533–42.PubMedPubMed CentralView ArticleGoogle Scholar
- Michaelis SU, Mezger M, Bornhauser M, et al. KIR haplotype B donors but not KIR-ligand mismatch result in a reduced incidence of relapse after haploidentical transplantation using reduced intensity conditioning and CD3/CD19-depleted grafts. Ann Hematol. 2014;93(9):1579–86.PubMedView ArticleGoogle Scholar
- Oevermann L, Michaelis SU, Mezger M, et al. KIR B haplotype donors confer a reduced risk for relapse after haploidentical transplantation in children with ALL. Blood. 2014;124(17):2744–7.PubMedPubMed CentralView ArticleGoogle Scholar
- Obama K, Utsunomiya A, Takatsuka Y, Takemoto Y. Reduced-intensity non-T-cell depleted HLA-haploidentical stem cell transplantation for older patients based on the concept of feto-maternal tolerance. Bone Marrow Transplant. 2004;34(10):897–9.PubMedView ArticleGoogle Scholar
- Ochiai N, Shimazaki C, Fuchida S, et al. Successful non-T cell-depleted HLA haplo-identical three-loci mismatched hematopoietic stem cell transplantation from mother to son based on the feto-maternal microchimerism in chronic myelogenous leukemia. Bone Marrow Transplant. 2002;30(11):793–6.PubMedView ArticleGoogle Scholar
- Yahng SA, Kim JH, Jeon YW, et al. A well-tolerated regimen of 800 cGy TBI-fludarabine-busulfan-ATG for reliable engraftment after unmanipulated haploidentical peripheral blood stem cell transplantation in adult patients with acute myeloid leukemia. Biol Blood Marrow Transplant. 2015;21(1):119–29.PubMedView ArticleGoogle Scholar
- Kanda J, Ichinohe T, Shimazaki C, et al. Long-term survival after HLA-haploidentical SCT from noninherited maternal antigen-mismatched family donors: impact of chronic GVHD. Bone Marrow Transplant. 2009;44(5):327–9.PubMedView ArticleGoogle Scholar
- Araki M, Hirayama M, Azuma E, et al. Prediction of reactivity to noninherited maternal antigen in MHC-mismatched, minor histocompatibility antigen-matched stem cell transplantation in a mouse model. J Immunol. 2010;185(12):7739–45.PubMedView ArticleGoogle Scholar
- Boeckh M, Nichols WG, Papanicolaou G, Rubin R, Wingard JR, Zaia J. Cytomegalovirus in hematopoietic stem cell transplant recipients: current status, known challenges, and future strategies. Biol Blood Marrow Transplant. 2003;9(9):543–58.PubMedView ArticleGoogle Scholar
- Fuchs EJ, Luznik L. HLA-haploidentical hematopoietic cell transplantation. www.uptodate.com.
- Federmann B, Bornhauser M, Meisner C, et al. Haploidentical allogeneic hematopoietic cell transplantation in adults using CD3/CD19 depletion and reduced intensity conditioning: a phase II study. Haematologica. 2012;97(10):1523–31.PubMedPubMed CentralView ArticleGoogle Scholar
- Shook DR, Triplett BM, Eldridge PW, Kang G, Srinivasan A, Leung W. Haploidentical stem cell transplantation augmented by CD45RA negative lymphocytes provides rapid engraftment and excellent tolerability. Pediatr Blood Cancer. 2015;62(4):666–73.PubMedView ArticleGoogle Scholar
- Bleakley M, Heimfeld S, Loeb KR, et al. Outcomes of acute leukemia patients transplanted with naive T cell-depleted stem cell grafts. J Clin Invest. 2015;125(7):2677–89.PubMedPubMed CentralView ArticleGoogle Scholar
- Aversa F, Terenzi A, Tabilio A, et al. Full haplotype-mismatched hematopoietic stem-cell transplantation: a phase II study in patients with acute leukemia at high risk of relapse. J Clin Oncol. 2005;23(15):3447–54.PubMedView ArticleGoogle Scholar
- Bolanos-Meade J, Fuchs EJ, Luznik L, et al. HLA-haploidentical bone marrow transplantation with posttransplant cyclophosphamide expands the donor pool for patients with sickle cell disease. Blood. 2012;120(22):4285–91.PubMedPubMed CentralView ArticleGoogle Scholar
- Pende D, Marcenaro S, Falco M, et al. Anti-leukemia activity of alloreactive NK cells in KIR ligand-mismatched haploidentical HSCT for pediatric patients: evaluation of the functional role of activating KIR and redefinition of inhibitory KIR specificity. Blood. 2009;113(13):3119–29.PubMedView ArticleGoogle Scholar
- Yan CH, Liu DH, Liu KY, et al. Risk stratification-directed donor lymphocyte infusion could reduce relapse of standard-risk acute leukemia patients after allogeneic hematopoietic stem cell transplantation. Blood. 2012;119(14):3256–62.PubMedView ArticleGoogle Scholar
- Zhu HH, Zhang XH, Qin YZ, et al. MRD-directed risk stratification treatment may improve outcomes of t(8;21) AML in the first complete remission: results from the AML05 multicenter trial. Blood. 2013;121(20):4056–62.PubMedView ArticleGoogle Scholar