STAT inhibitors for cancer therapy
© Furqan et al.; licensee BioMed Central Ltd. 2013
Received: 26 October 2013
Accepted: 2 December 2013
Published: 5 December 2013
Signal Transducer and Activator of Transcription (STAT) proteins are a family of cytoplasmic transcription factors consisting of 7 members, STAT1 to STAT6, including STAT5a and STAT5b. STAT proteins are thought to be ideal targets for anti-cancer therapy since cancer cells are more dependent on the STAT activity than their normal counterparts. Inhibitors targeting STAT3 and STAT5 have been developed. These included peptidomimetics, small molecule inhibitors and oligonucleotides. This review summarized advances in preclinical and clinical development of these compounds.
Signal Transducer and Activator of Transcription (STAT) proteins are a family of cytoplasmic transcription factors consisting of 7 members, STAT1 to STAT6, STAT5a and STAT5b . They are activated either by receptor associated tyrosine kinases like Janus kinases (JAKs) or by receptors with intrinsic tyrosine kinase activity e.g. PDGFR, EGFR, FLT3. They can also be activated by constitutively active non-receptor protein tyrosine kinases (PTKs), such as c-Src Bcr-Abl, and Brk (Breast tumor kinase) [2, 3]. Specific phosphorylation of STAT proteins by these tyrosine kinases causes their homo- or hetero-dimerization. These dimers then migrate to the nucleus to control gene expression.
Each STAT protein is encoded by a separate gene. However they share structural similarities with six conserved domains. These conserved domains from N to C terminus include oligomerization domain, coiled coil, DNA binding domain, linker domain, SH2 domain, and transactivation domain. Alternate mRNA splicing or proteolytic processes can give rise to multiple isoforms lacking part of the c-terminal domain and referred to as STATβ isoforms as opposed to regular full length STATα. These truncated β isoforms put forth dominant negative effect and compete with regular α isoforms. β isoforms are isolated in case of STAT1, 3 and 5 .
Functionally STAT2, 4, & 6 regulate immune responses whereas STAT1, 3, & 5 have diverse physiological role. They regulate expression of genes controlling cell cycle (Cyclin D1, D2, and c-Myc), cell survival (Bcl-xL, Bcl-2, Mcl-1), angiogenesis (HIF1α, VEGF) etc. Because of their critical role they are precisely regulated with activation and deactivation cycle of no more than a few hours . Dysregulation at any level, i.e. cytokines, growth factors, tyrosine kinases, negative feedback mechanisms involving STAT pathway, can lead to increase in their activity and contribute to tumorigenesis.
STAT3 and 5 are persistently activated in many human cancer cell lines [2, 4, 5]. They are not only involved in cancer development and progression but also contribute to their survival . Likewise, inhibition of STAT signaling induces growth arrest in several cancer models, suggesting their role as point of convergence from multiple upstream oncogenic pathways [5, 7, 8]. In addition, it has been demonstrated that cancer cells are more dependent on STAT activity than their normal counterparts. Several studies have illustrated to this fact that blocking STAT3 or 5 signaling lead to apoptosis in tumor cells. Whereas healthy cells were not only able to survive at very lower level of STAT3 or 5 but also capable of growing by an alternative mechanism . Therefore targeting these transcriptional factors is very appealing in development of new anti-cancer therapy as it will block assembly of upstream molecular aberrations with less toxicity.
Aberrations of STAT3 signaling in various cancer models were appreciated before STAT5, therefore investigators initially concentrated on targeting STAT3. However, STAT5 emerged as an equally important activated transcription factor in many cancers [7, 9, 10]. Nonetheless, effort made in this regard is very little. Only few candidate molecules have been found to date that are specifically active against STAT5. This review will focus on progress of agents that directly inhibit STAT3 and STAT5 without significantly affecting other tyrosine kinases or SH-2 containing proteins. In addition these inhibitors do not possess appreciable influence on other cellular survival signaling pathways like MAPK/ERK, PI3K/mTOR/Akt.
Peptides and peptidomimetics
STAT3 via its SH2 domain binds to phospho-tyrosine residue of several proteins like gp130, leukemia inhibitory factor receptor (LIFR), epidermal growth factor receptor (EGFR), interleukin 10 receptor (IL-10R), and granulocyte colony stimulating factor receptor (G-CSFR). Ren et al. develop another potent phosphopeptide from STAT binding sequence of gp130, Ac-pYLPQTV-NH3 (IC50 = 150nM: Figure 1b), having activity against STAT3. They also pinpointed that Leucine at pY + 1 and Glutamine at pY + 3 were critical for its activity .
Peptidomimetics have better pharmacokinetic properties than peptides. As a result investigators employed the afore-mentioned peptide, XpYL as the basic structural scaffold to develop their peptidomimetic compounds. Out of these, ISS610 (IC50 = 42 μM: Figure 1c) ; and S31-M2001 (IC50 = 79uM: Figure 1d) had superior pharmacokinetic profiles .
Similarly several other peptidomimetic molecules have been developed from the basic scaffold of compound shown in Figure 1b [15–19]. Among these CJ-1383 (Figure 1e) showed promising results with IC50 = 3–11 μM in two breast cancer cell lines containing high levels of phosphorylated STAT3 .
Despite hard work of several investigators, these agents need substantial improvement with regards to their in vivo metabolic susceptibility and cellular permeability prior to clinical testing. For the same reason no promising STAT5 dimerization inhibitor could be developed from this class (Figure 1).
Non-peptidic small molecule inhibitors
In vitro and in vivo studies of non-nucleotide based STAT inhibitors
Cancer type studied in vitro(cell lines)
Cancer type studied in vivo(cell lines)
Stattic (20, 31, 40, 42)
Breast (MDA-MB-231, -435S,-468, SUM159, SK-BR-3), Hepatocellular (SNU-387, -398, -449, Hep3B HepG2, Huh-7), Pancreatic (Panc-1, HPAC, BXPC-3, SW1990), Colon (SW480, HCT-116), Glioblastoma (U87, U251), Multiple Myeloma (U266, ARH77)
STA-21 (22, 23)
Rhabdomyosarcoma (RH30, RD2), Breast (MDA-MB-231, -435 s, -468)
Glioblastoma (U87, U251, U373), Chronic Myeloid Leukemia (K562), Prostate (DU145)
LLL12 (26–29, 46–47)
Medulloblastoma (Daoy, UW426, UW288-1), Glioblastoma (U87, U87delta, U373), Multiple Myeloma (U266, ARH-77 & patient’s primary cell lines), Breast (MDA-MB-231, SK-BR3), Pancreatic (HPAC, Panc-1), Rhabdomyosarcoma lines (RD2, RH28, RH30), Osteosarcoma (U2OS, SAOS2, SJSA)
Multiple Myeloma (ARH-77), Glioblastoma (U87), Breast (MDA-MB-231), Osteosarcoma (OS33)
Rhabdomyosarcoma (RD2, RH30, RH28), Breast (MDA-MB-231, SUM 159), Pancreatic (Panc-1, SW 1990), Hepatocellular (SNU-387, SNU-398, HepG2, Huh-7)
S31-201 (32, 40)
Breast (MDA-MB-231, -435, -468), Multiple Myeloma (U266, ARH77)
Breast (MDA-MB-231, -468); Pancreatic (Panc-1), Prostate (DU145), Acute Myeloid Leukemia (OCI-AML-2)
Breast (MDA-MB-468), AML (OCI-AML-2), Prostate (DU145)
Breast (MDA-MB-468), Prostate (DU145), Multiple Myeloma (JJN3)
Prostate (DU145), Breast (MDA-MB-468)
FLL32 (40, 42, 44, 45, 46, 47)
Rhabdomyosarcoma (RD2, RH28, RH30); Renal (ACHN, SK-RC-45, -54, Caki), Melanoma (A375, Hs294T), HN-SCC (UM-SCC-29, -74B), Breast (MDA-MB-231,-468, SUM159, SK-BR-3), Pancreatic (Panc-1, HPAC, BXPC-3, SW1990); Colon (SW480, HCT-116), Glioblastoma (U87, U251), Multiple Myeloma (U266, ARH77), Hepatocellular (SNU-449, SNU-398, SNU-387, Hep3B), Osteosarcoma (U2OS, SAOS2, SJSA)
Breast (MDA-MB-231), Osteosarcoma (OS33), Pancreatic* (Panc-1 in chicken embryo chorioallontoic membrane)
Renal cell carcinoma (ACHN, SK-RC-45, SK-RC-54, Caki), Melanoma (A375, Hs294T)
Acute Myeloid Leukemia (Kasumi-1, THP-1, GDM-1, NB-4)
Osteosarcoma (U2OS), Rhabdosarcoma (RH30, RD2), Ewing Sarcoma (EW8).
BP-1108 & BP-1075 (52)
Chronic Myeloid Leukemia (K562) and Acute Myeloid Leukemia (MV4-11)
IS3 295 (54)
Breast (MDA-MB-231,-435,-468), Prostate (DU145), Pancreatic (Panc-1), MM (U266)
Prostate cancer (DU145, PC-3)
T cell –Acute Lymphoblastic Leukemia
Inhibitors targeting STAT3-SH2 binding domain
Similar to peptidomimetics, small molecule inhibitors interact with STAT-SH2 domain and hamper STAT: STAT dimerization, nuclear translocation and transcriptional activity. Several investigators independently screened diverse chemical libraries by different methods to identify specific small molecules that can inhibit STAT3.
Lin and colleagues performed structure-based virtual screening of more than 425,000 compounds form four different chemical libraries to search a suitable STAT3 inhibitor. Out of top 200 compounds, they tested 100 chemicals with in vitro cell luciferase assay and found STA-21 (Figure 2b), a deoxytetrangomycin, as the most promising compound (IC50 of 12.2 μM & 18.7 μM in DU145 and PC3 cell lines respectively). It binds with SH2-domain of STAT3 and effectively inhibits STAT3 dimerization and demonstrated inhibition of growth and survival of breast and soft tissue sarcoma cell lines [22, 23].
The same group developed a structural analogue of STA-21, LLL-3. This molecule has better cellular permeability than STA-21. Initially they treated human glioblastoma cell lines with LLL-3 in vitro and observed decreased viability of tumor cells (IC50 ranged between 10–15 μM in different Glioblastoma cell lines). The efficacy was also demonstrated by the observation that LLL-3 treated nude mice with intracranial glioblastoma lived longer than those treated with placebo . Constitutive activation of STAT3 and STAT5 is observed in chronic myelogenous leukemic cells due to activity of Abl kinase, therefore Mencalha and colleagues treated K562 leukemic cells with LLL-3. They demonstrated that it decreased tumor cell survival and possesses synergistic effect with Imatinib .
For further optimization of LLL-3, Lin and colleagues replaced its acetyl group with sulfonamide and developed another STAT3 inhibitor, LLL12 (Figure 2c). It specifically prevents phosphorylation of Tyr 705 residue of STAT3 with IC50 ranging from 0.16 μM to 3.09 μM in various human cancer cell lines including HPAC, U87,U373, PANC1, and SK-BR-3 [26–28]. More recently, another non-peptide cell-permeable, small molecule, called as XZH-5, was studied. In the docking model, it binds with SH2-domain of STAT3 and prevents STAT3 phosphorylation at Tyr705, leading to inhibition of downstream STAT3 activities and apoptosis in multiple cancer cell lines including breast, pancreatic, hepatocellular carcinoma and rhabdomyosarcoma (IC50 ≈ 15-50 μM) [29–31].
Structure-based high-throughput virtual screening of the National Cancer Institute (NCI) chemical libraries identified another potent STAT3 inhibitor, S31-201. Its salicylic acid moiety docks with pTyr binding site of STAT3-SH2 domain. S31-201 (IC50 = 86 μM: Figure 2d) inhibited proliferation of hepatocellular and breast cancer cells in mice . However GOLD docking studies suggested suboptimal interaction between STAT3 and S31-201. In an effort to improve this interaction, several molecules were rationally developed by Fletcher et al. Of these SF-1066 (Figure 2e) and SF-1087 are noteworthy with IC50 of 37 μM and 24 μM respectively in DU145 cell line [33, 34]. They also reported 16 novel sulphoneamide analogues of SF-1066. Among those, 17o effectively inhibited STAT3:STAT3 interaction (IC50 = 19 μM) and was considered to be the most potent. Authors demonstrated that inhibition of STAT3 function in breast and myeloma cancer cells correlated with increased cell death (EC50 = 10 & 16 μM, respectively) .
Matsuno et al. recognized STX-0119 (IC50 = 74 μM: Figure 2f), a derivative of N-[2-(1, 3, 4-oxadiazolyl)]-4-quinolinecarboxamide by virtual screen using a customized version of DOCK4 program with the crystal structure of STAT3. Oral administrations of STX-0119 arrested the growth of human lymphoma cells in a SCC-3 subcutaneous xenograft model through inhibition of STAT3 activity .
Shin et al. searched within the natural compounds using a dual-luciferase assay to describe novel and specific inhibitor of STAT3. Cryptotanshinone, derived from roots of Salvia miltiorrhiza Bunge (Danshen, a Chinese herb), was identified as a potent STAT3 inhibitor. Cryptotanshinone inhibited STAT3 activity in a dose-dependent manner in HCT 116 colon cancer cells with an IC50 value of 4.6 μM. Activity of STAT3 was also inhibited in breast, prostate and cervical cancer cell lines. Study of binding mechanism revealed that cryptotanshinone directly interact with SH2 domain of STAT3 to inhibit Tyr705 phosphorylation and prevents STAT3 dimerization and nuclear translocation .
One chemical library with 920,000 small drug-like compounds virtually screened by docking each into the peptide-binding pocket of the STAT3-SH2 domain, the compounds C3, C30, and C188 were found to be active in inhibiting IL-6-mediated phosphorylation of STAT3 with an IC50 of 91, 18 and 73 μM respectively . As C188 was the most potent, Redell et al. performed similarity screening using C188 scaffold followed by 3-D pharmacophore analysis and identified more potent compounds. Among these second generation compounds, C188-9, inhibited G-CSF–induced STAT3 phosphorylation with low micromolar potency. IC50 of C188-9 in several AML cell lines ranged from 4.1 μM to 8.3 μM .
More recently Li and colleagues developed a novel STAT3-SH2 dimerization inhibitor by utilizing in-silico site-directed fragment-based drug design. They utilized naphthalene-5,8-dione-1-sulphoneamide fragment of compound LLL12 as binding moiety to pTyr705 of STAT3-SH2 domain and linked it to a dimethyl amine with an R group. Based on differences in R group they developed 5 different compounds. One of these compounds (LY5, IC50 0.5-1.39 μM for U2OS and RD2 cell lines) found to be more potent than control (LLL12), easy to synthesize and possessed more drug-able properties .
Unfortunately, these STAT3 inhibitors are still not potent enough or drugable to be examined in clinical studies.
Inhibitors targeting STAT5-SH2 binding domain
Similar to the development of STAT3 inhibitors, Berg et al. screened large small-molecule libraries in search of compounds that can modulate SH2 domain of STAT5. Out of 17,298 compounds, they found chromone-derived nicotinyl hydrazone (Figure 3e) as the most potent molecule disrupting the linkage between peptide, 5-carboxyfluorescein-GY(PO3H2)LVLDKW, derived from the erythropoietin (EPO) receptor, and the SH2 domain of STAT5b. It was 10 times more potent in inhibiting STAT5b-SH2 interaction (IC50 = 47 μM) than STAT3 (IC50 > 500 μM). This compound also inhibited IFNα stimulated STAT5 tyrosine phosphorylation in lymphoma (Daudi) cells. However, high concentration of the compound (100-200 μM) was required [10, 51].
In an effort to develop more potent in vivo STAT5-SH2 inhibitor, Gunning et al. investigated the application of small molecule scaffolds targeting STAT5-SH2 domain. They performed in-silico screening of NCI library of small molecules, and showed that salicylic acid containing compounds effectively binds the STAT5-SH2 domains. Subsequently they accessed and screened their previously designed salicylic acid containing STAT3-SH2 domain binding library of compounds to find potent STAT5 inhibitors. From their rationally designed privileged structures, they identified two compounds (BP-1108 and BP-1075) to be most potent in vivo inhibitors of STAT5 in MV-4-11 and K562 leukemia cell lines. Their lead agent BP-1108 (IC50 = 17 μM for K562 cell line) also down- regulated STAT5 dependent genes, including C-myc, cyclin D1, cyclin D2, MCL-1.
Inhibitors modulating STAT interaction with nuclear material
Platinum compounds are known to form DNA adduct and cause cytotoxic effects. Compounds like CPA-1, CPA-7 can disrupt STAT3 ability to bind DNA leading to apoptosis in STAT3 dependent human breast and colon cancer cell lines . Another platinum compound, IS3 295 (Figure 3) inhibit STAT3 binding to its DNA response element (in vitro IC50 = 1.4 μM). It leads to cell cycle arrest, inhibition of proliferation with induction of apoptosis in human breast (MDA-MB-435, MDA-MB-468, and MDA-MD-231), pancreatic (Panc1), prostate (DU145), lung (non-small cell- A549) cancers and multiple myeloma (U266) cell lines . As opposed to cisplatin, direct modification of DNA is not necessary for IS3 295 to inhibit STAT3-DNA interaction. Also, it binds with both inactive STAT3 monomers and active dimmers and blocks the binding of the later with DNA. These compounds possess minimal or no activity to inhibit STAT5-DNA interaction.
Another potent compound believed to inhibit STAT3 to DNA binding is Galiellalactone derived from ascomyecete, Galiella rufa. It induced apoptosis in hormone refractory prostate cancer cells in mouse xenograft when administered via daily intraperitoneal injection for 3 weeks. Galiellalactone inhibited STAT3-mediated luciferase activity (IC50 ≈ 5 μM) and reduced the relative mRNA expression of Bcl-xL and Mcl-1.
Covalent modification of histone proteins by acetylation and deacetylation of lysine residues modulate “opening” and “closing” of chromatin architecture for transcription. Acetylation of lysine residues neutralize the charges and recruit proteins containing bromodomains that are modules in DNA binding proteins. So far more than 60 bromodomains have been discovered in 46 different human proteins . All bromodomain modules in these proteins share a highly conserved fold comprising left-handed bundle of four alpha helices, which make a deep hydrophobic cavity to house acetylated lysine residues on histone tails. BET bromodomain is the subfamily of bromodomain proteins comprising several important bromodomain like BRD2, BRD3, BRD4 and BRDT. JQ1 (Figure 3g), a small molecule that enters into the deep pockets of these bromodomains and hamper their interaction with chromatin and functioning of transcription complex thereof. Therefore it has the potential to inhibit the functioning of several transcription activators that utilize bromodomains as coactivator. By the same token, transcription of several oncogenes can also be decreased if their transcription initiation begins with bromodomain interaction e.g. MYC. Liu S et al. studied lymphocytic leukemic cells with high STAT5 activity and treated them with JQ1. As BRD2 acts as co-activator of STAT5 dependent transcriptional activity, JQ1 was able to effectively inhibit STAT5-dependent transcription . From this study one can predict that STAT5 driven cancers and diseases can be one of the several potential targets of JQ1 or related compounds.
Oligonucleotides targeting STAT pathway
In vitro and in vivo studies of nucleotide based STAT inhibitors
Nucleotide based Agent (Ref)
Cancer type studied in vitro(cell lines)
Cancer type studied in vivo(cell lines)
STAT3 ODN (59, 60, 61, 62, 63)
Head & Neck Squamous cell carcinoma (1483), Lung cancer (A549), Colon cancer (SW480), Glioma (U251, A172)
Anti-Sense (AZD9150) (70, NCT01839604)
Non-Hodgkin lymphoma,Hepatocellular carcinoma
STAT3-siRNA (72, 73, 74, 75, 76, 77, 79)
Breast (MCF7, MDA-MB-231); CML (K562); Glioblastoma (A 172, U251-GM) ; Oral SCC (HSC3, HSC4, KB, GFP-SAS), Epidermoid carcinoma ( STAT3siRNA coupled with mAb to Lewis-Y antigen (A431); CTCL (Hut78)
Breast (MCF7, MDA-MB-231)
STAT3-G-Quartet (82, 83, 84)
Prostate (PC-3, DU145, LNCap), Breast (MDA-MB-468)
Prostate (PC-3, DU145), Breast (MDA-MB-468)
Chronic Myeloid Leukemia (K562)
STAT5- siRNA (72, 81)
CML (K562), Hepatocellular (SMMC7721),
Hepatocellular (SMMC7721), Pancreatic cancer (HPAF-11)
Decoy Oligonucleotide (ODN) - a form of oligonucleotide based approach in which synthetically derived cis-element, usually double stranded 10–20 base pair sequences, is transfected into cells. These ODNs then bind with transcription factor’s DNA binding domain (e.g. STAT3-DNA binding domain) to prevent their interaction with DNA response element. This strategy effectively attenuates specific gene expression. Specific ODN has been studied for STAT3 and STAT5 inhibition in various cancer cell lines including K562, U251, A172, A549, and SW480 in vitro and in mice xenograft model of Lung cancer [59–64]. Therapeutic success of this approach relies on effective entry and stability of decoy oligonucleotide in the cells. Modification of phosphodiester bonds such as methyl phosphate, phosphoramidite, or methyl phosphonate and utilization of suitable gene transfer techniques successfully overcame many of these issues [65, 66]. In addition, an experimental study supported the safety of STAT3 ODN in non-human primates . ODN compounds have not progressed to clinical trials so far.
Majority of antisense nucleotide drugs bind to messenger RNA (mRNAs) and inhibit the production of disease-causing proteins. Several antisense oligonucleotide (ASO) based drugs are in various phases of clinical trials. Mipomersen sodium (kynamro), a sequence of 20 nucleotides complementary to mRNA of apolipoprotein B-100, got FDA approval in January 2013 as adjunct to lipid lowering therapy [68, 69].
AZD9150 (ISIS-STAT3Rx or ISIS 481464), a synthetic ASO against STAT3, underwent phase I evaluation in patients with advanced lymphoma and solid tumors. Investigators reported preliminary findings on 15 patients who were heavily treated in the past. Six patients with advanced lymphoma (3 DLBCL, 2 Hodgkin’s lymphoma, 1 mantle cell lymphoma) and 9 patients’ with solid tumors participated in this study. Thrombotic microangiopathy was the dose limiting toxicity in one patient and the dose of 2 mg/kg weekly after loading dose was recommended for phase II evaluation. 2/3 DLBCL patients demonstrated more than 50% reduction in tumor size. No responses were observed in any of the patients with solid tumors. Phase 2 study is currently ongoing  [NCT01563302].
Recently, a group from South Korea initiated another phase I trial utilizing AZD9150 in patients with advanced hepatocellular carcinoma [NCT01839604].
RNA interference (RNAi) is a natural post-transcriptional gene-silencing mechanism to turn off unwanted genes. The process is initiated by the presence of double stranded RNA, not a constituent of a normal cell cytoplasm. The dsRNAs are cleaved by an endonuclease named dicer into 20–25 nucleotide dsRNA referred to as Short or Small Interfering RNAs (siRNAs). RNA-induced silencing complex separates the two strands, and one of these strands then serves as a guide for sequence-specific degradation of homologous mRNA. This mechanism was initially utilized to study gene function by silencing it. However, it can potentially be used clinically to knockout genes causing disease of interest.
Utility of this approach is limited because transfected RNAs have very short lives. This therefore requires frequent administration of siRNA in to the cells. Using DNA directed RNA interference technique, a short hairpin RNA (shRNA, a double stranded RNA) is expressed in the cell after insertion of a DNA construct in to the nucleus. These shRNAs then enter RNAi pathway. In this strategy gene silencing lasts for as long as the cell continues to produce its own shRNA .
This strategy is under evaluation in several clinical trials for the treatment of several diseases including cancers [NCT01591356, NCT00363714, NCT00689065, NCT00938574]. However, data regarding siRNA targeted silencing of STAT genes for cancer therapy are limited to in vitro studies and in vivo studies of animal models only [72–81].
G-rich (Guanine rich) oligonucleotides can form inter- or intra-molecular four-stranded structures, called as G-quartets. G-quartets arise from the association of four G-bases into a cyclic Hoogsteen H-bonding arrangement. They have been shown to play vital role in several cellular processes. G-quartet–forming oligonucleotides can block STAT3 activity by targeting STAT3 proteins and inhibit their ability to bind DNA . Jing and colleague demonstrated the efficacy of this strategy by utilizing T40214, a G-quartet, in vitro and in mouse model against prostate cancer cell lines [83, 84]. However, this approach has not reached in to clinical trial.
Conclusion and future directions
JAK/STAT pathways are major signaling channels for transmitting extracellular signals into the nuclei of cells. Monoclonal antibodies have been developed to target the signaling molecules along the related pathways [85–87]. In addition, small molecule inhibitors of JAK and Kit are widely used in cancer therapy [88–93]. Inhibitors targeting STAT molecules, particularly STAT3 and STAT5, are under intensive studies. Relatively less favorable/ drugable properties of peptidomimetics shifted the search towards the development of small molecules. However, candidate compounds at this time are not potent enough to advance to the level of clinical trial. Further work is warranted in this regard. Molecular techniques employing oligonucleotide approach seem promising.
Yamei Chen is supported by a grant from Xiamen Zhongshan Hospital, Fujian, China and by NYMC Blood Disease Fund.
- Furqan M, Mukhi N, Lee B, Liu D: Dysregulation of JAK-STAT pathway in hematological malignancies and JAK inhibitors for clinical application. Biomark Res. 2013, 1 (1): 5-10.1186/2050-7771-1-5.PubMed CentralView ArticlePubMedGoogle Scholar
- Buettner R, Mora LB, Jove R: Activated STAT signaling in human tumors provides novel molecular targets for therapeutic intervention. Clin Cancer Res. 2002, 8 (4): 945-954.PubMedGoogle Scholar
- Weaver AM, Silva CM: Signal transducer and activator of transcription 5b: a new target of breast tumor kinase/protein tyrosine kinase 6. Breast Cancer Res. 2007, 9 (6): R79-10.1186/bcr1794.PubMed CentralView ArticlePubMedGoogle Scholar
- Lavecchia A, Di Giovanni C, Novellino E: STAT-3 inhibitors: state of the art and new horizons for cancer treatment. Curr Med Chem. 2011, 18 (16): 2359-2375. 10.2174/092986711795843218.View ArticlePubMedGoogle Scholar
- Yu H, Jove R: The STATs of cancer–new molecular targets come of age. Nat Rev Cancer. 2004, 4 (2): 97-105. 10.1038/nrc1275.View ArticlePubMedGoogle Scholar
- Catlett-Falcone R, Landowski TH, Oshiro MM, Turkson J, Levitzki A, Savino R, Ciliberto G, Moscinski L, Fernandez-Luna JL, Nunez G: Constitutive activation of Stat3 signaling confers resistance to apoptosis in human U266 myeloma cells. Immunity. 1999, 10 (1): 105-115. 10.1016/S1074-7613(00)80011-4.View ArticlePubMedGoogle Scholar
- Ferbeyre G, Moriggl R: The role of Stat5 transcription factors as tumor suppressors or oncogenes. Biochimica et Biophysica Acta (BBA)-Reviews on. Cancer. 2011, 1815 (1): 104-114.Google Scholar
- Vogelstein B, Kinzler KW: Cancer genes and the pathways they control. Nat Med. 2004, 10 (8): 789-799. 10.1038/nm1087.View ArticlePubMedGoogle Scholar
- Warsch W, Grundschober E, Sexl V: Adding a new facet to STAT5 in CML: multitasking for leukemic cells. Cell Cycle. 2013, 12 (12): 1813-1814. 10.4161/cc.25116.PubMed CentralView ArticlePubMedGoogle Scholar
- Muller J, Sperl B, Reindl W, Kiessling A, Berg T: Discovery of chromone-based inhibitors of the transcription factor STAT5. Chembiochem. 2008, 9 (5): 723-727. 10.1002/cbic.200700701.View ArticlePubMedGoogle Scholar
- Turkson J, Ryan D, Kim JS, Zhang Y, Chen Z, Haura E, Laudano A, Sebti S, Hamilton AD, Jove R: Phosphotyrosyl peptides block Stat3-mediated DNA binding activity, gene regulation, and cell transformation. J Biol Chem. 2001, 276 (48): 45443-45455. 10.1074/jbc.M107527200.View ArticlePubMedGoogle Scholar
- Ren Z, Cabell LA, Schaefer TS, McMurray JS: Identification of a high-affinity phosphopeptide inhibitor of Stat3. Bioorg Med Chem Lett. 2003, 13 (4): 633-636. 10.1016/S0960-894X(02)01050-8.View ArticlePubMedGoogle Scholar
- Turkson J, Kim JS, Zhang S, Yuan J, Huang M, Glenn M, Haura E, Sebti S, Hamilton AD, Jove R: Novel peptidomimetic inhibitors of signal transducer and activator of transcription 3 dimerization and biological activity. Mol Cancer Ther. 2004, 3 (3): 261-269.PubMedGoogle Scholar
- Siddiquee KA, Gunning PT, Glenn M, Katt WP, Zhang S, Schrock C, Sebti SM, Jove R, Hamilton AD, Turkson J: An oxazole-based small-molecule Stat3 inhibitor modulates Stat3 stability and processing and induces antitumor cell effects. ACS Chem Biol. 2007, 2 (12): 787-798. 10.1021/cb7001973.View ArticlePubMedGoogle Scholar
- Chen J, Bai L, Bernard D, Nikolovska-Coleska Z, Gomez C, Zhang J, Yi H, Wang S: Structure-based design of conformationally constrained, cell-permeable STAT3 inhibitors. ACS Med Chem Lett. 2010, 1 (2): 85-89. 10.1021/ml100010j.PubMed CentralView ArticlePubMedGoogle Scholar
- Coleman DR, Ren Z, Mandal PK, Cameron AG, Dyer GA, Muranjan S, Campbell M, Chen X, McMurray JS: Investigation of the binding determinants of phosphopeptides targeted to the SRC homology 2 domain of the signal transducer and activator of transcription 3. Development of a high-affinity peptide inhibitor. J Med Chem. 2005, 48 (21): 6661-6670. 10.1021/jm050513m.View ArticlePubMedGoogle Scholar
- Gomez C, Bai LC, Zhang J, Nikolovska-Coleska Z, Chen JY, Yi H, Wang SM: Design, synthesis, and evaluation of peptidomimetics containing Freidinger lactams as STAT3 inhibitors. Bioorg Med Chem Lett. 2009, 19 (6): 1733-1736. 10.1016/j.bmcl.2009.01.091.View ArticlePubMedGoogle Scholar
- Mandal PK, Heard PA, Ren ZY, Chen XM, McMurray JS: Solid-phase synthesis of Stat3 inhibitors incorporating O-carbamoylserine and O-carbamoylthreonine as glutamine mimics. Bioorg Med Chem Lett. 2007, 17 (3): 654-656. 10.1016/j.bmcl.2006.10.099.PubMed CentralView ArticlePubMedGoogle Scholar
- Mandal PK, Limbrick D, Coleman DR, Dyer GA, Ren Z, Birtwistle JS, Xiong C, Chen X, Briggs JM, McMurray JS: Conformationally constrained peptidomimetic inhibitors of signal transducer and activator of transcription. 3: Evaluation and molecular modeling. J Med Chem. 2009, 52 (8): 2429-2442. 10.1021/jm801491w.PubMed CentralView ArticlePubMedGoogle Scholar
- Schust J, Sperl B, Hollis A, Mayer TU, Berg T: Stattic: a small-molecule inhibitor of STAT3 activation and dimerization. Chem Biol. 2006, 13 (11): 1235-1242. 10.1016/j.chembiol.2006.09.018.View ArticlePubMedGoogle Scholar
- Sanseverino I, Purificato C, Gauzzi MC, Gessani S: Revisiting the specificity of small molecule inhibitors: the example of stattic in dendritic cells. Chem Biol. 2012, 19 (10): 1213-1214. 10.1016/j.chembiol.2012.08.021. author reply 1215–1216View ArticlePubMedGoogle Scholar
- Chen CL, Loy A, Cen L, Chan C, Hsieh FC, Cheng G, Wu B, Qualman SJ, Kunisada K, Yamauchi-Takihara K: Signal transducer and activator of transcription 3 is involved in cell growth and survival of human rhabdomyosarcoma and osteosarcoma cells. BMC Cancer. 2007, 7: 111-10.1186/1471-2407-7-111.PubMed CentralView ArticlePubMedGoogle Scholar
- Song H, Wang RX, Wang SM, Lin J: A low-molecular-weight compound discovered through virtual database screening inhibits Stat3 function in breast cancer cells. Proc Natl Acad Sci USA. 2005, 102 (13): 4700-4705. 10.1073/pnas.0409894102.PubMed CentralView ArticlePubMedGoogle Scholar
- Fuh B, Sobo M, Cen L, Josiah D, Hutzen B, Cisek K, Bhasin D, Regan N, Lin L, Chan C: LLL-3 inhibits STAT3 activity, suppresses glioblastoma cell growth and prolongs survival in a mouse glioblastoma model. Br J Cancer. 2009, 100 (1): 106-112. 10.1038/sj.bjc.6604793.PubMed CentralView ArticlePubMedGoogle Scholar
- Mencalha AL, Du Rocher B, Salles D, Binato R, Abdelhay E: LLL-3, a STAT3 inhibitor, represses BCR-ABL-positive cell proliferation, activates apoptosis and improves the effects of Imatinib mesylate. Cancer Chemother Pharmacol. 2010, 65 (6): 1039-1046. 10.1007/s00280-009-1109-3.View ArticlePubMedGoogle Scholar
- Ball S, Li C, Li PK, Lin J: The small molecule, LLL12, inhibits STAT3 phosphorylation and induces apoptosis in medulloblastoma and glioblastoma cells. PLoS One. 2011, 6 (4): e18820-10.1371/journal.pone.0018820.PubMed CentralView ArticlePubMedGoogle Scholar
- Lin L, Benson DM, DeAngelis S, Bakan CE, Li PK, Li C, Lin J: A small molecule, LLL12 inhibits constitutive STAT3 and IL-6-induced STAT3 signaling and exhibits potent growth suppressive activity in human multiple myeloma cells. Int J Cancer. 2012, 130 (6): 1459-1469. 10.1002/ijc.26152.PubMed CentralView ArticlePubMedGoogle Scholar
- Lin L, Hutzen B, Li PK, Ball S, Zuo M, DeAngelis S, Foust E, Sobo M, Friedman L, Bhasin D: A novel small molecule, LLL12, inhibits STAT3 phosphorylation and activities and exhibits potent growth-suppressive activity in human cancer cells. Neoplasia. 2010, 12 (1): 39-50.PubMed CentralView ArticlePubMedGoogle Scholar
- Liu A, Liu Y, Jin Z, Hu Q, Lin L, Jou D, Yang J, Xu Z, Wang H, Li C: XZH-5 inhibits STAT3 phosphorylation and enhances the cytotoxicity of chemotherapeutic drugs in human breast and pancreatic cancer cells. PLoS One. 2012, 7 (10): e46624-10.1371/journal.pone.0046624.PubMed CentralView ArticlePubMedGoogle Scholar
- Liu A, Liu Y, Xu Z, Yu W, Wang H, Li C, Lin J: Novel small molecule, XZH-5, inhibits constitutive and interleukin-6-induced STAT3 phosphorylation in human rhabdomyosarcoma cells. Cancer Sci. 2011, 102 (7): 1381-1387. 10.1111/j.1349-7006.2011.01932.x.View ArticlePubMedGoogle Scholar
- Liu Y, Liu A, Xu Z, Yu W, Wang H, Li C, Lin J: XZH-5 inhibits STAT3 phosphorylation and causes apoptosis in human hepatocellular carcinoma cells. Apoptosis. 2011, 16 (5): 502-510. 10.1007/s10495-011-0578-0.View ArticlePubMedGoogle Scholar
- Siddiquee K, Zhang S, Guida WC, Blaskovich MA, Greedy B, Lawrence HR, Yip MLR, Jove R, McLaughlin MM, Lawrence NJ: Selective chemical probe inhibitor of Stat3, identified through structure-based virtual screening, induces antitumor activity. Proc Natl Acad Sci USA. 2007, 104 (18): 7391-7396. 10.1073/pnas.0609757104.PubMed CentralView ArticlePubMedGoogle Scholar
- Fletcher S, Singh J, Zhang X, Yue PB, Page BDG, Sharmeen S, Shahani VM, Zhao W, Schimmer AD, Turkson J: Disruption of transcriptionally active Stat3 dimers with Non-phosphorylated, salicylic acid-based small molecules: potent in vitro and tumor cell activities. Chembiochem. 2009, 10 (12): 1959-1964. 10.1002/cbic.200900172.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang X, Yue P, Fletcher S, Zhao W, Gunning PT, Turkson J: A novel small-molecule disrupts Stat3 SH2 domain-phosphotyrosine interactions and Stat3-dependent tumor processes. Biochem Pharmacol. 2010, 79 (10): 1398-1409. 10.1016/j.bcp.2010.01.001.PubMed CentralView ArticlePubMedGoogle Scholar
- Page BD, Fletcher S, Yue P, Li Z, Zhang X, Sharmeen S, Datti A, Wrana JL, Trudel S, Schimmer AD: Identification of a non-phosphorylated, cell permeable, small molecule ligand for the Stat3 SH2 domain. Bioorg Med Chem Lett. 2011, 21 (18): 5605-5609. 10.1016/j.bmcl.2011.06.056.PubMed CentralView ArticlePubMedGoogle Scholar
- Matsuno K, Masuda Y, Uehara Y, Sato H, Muroya A, Takahashi O, Yokotagawa T, Furuya T, Okawara T, Otsuka M: Identification of a new series of STAT3 inhibitors by virtual screening. ACS Med Chem Lett. 2010, 1 (8): 371-375. 10.1021/ml1000273.PubMed CentralView ArticlePubMedGoogle Scholar
- Shin DS, Kim HN, Shin KD, Yoon YJ, Kim SJ, Han DC, Kwon BM: Cryptotanshinone inhibits constitutive signal transducer and activator of transcription 3 function through blocking the dimerization in DU145 prostate cancer cells. Cancer Res. 2009, 69 (1): 193-202. 10.1158/0008-5472.CAN-08-2575.View ArticlePubMedGoogle Scholar
- Gupta SC, Patchva S, Aggarwal BB: Therapeutic roles of curcumin: lessons learned from clinical trials. AAPS J. 2013, 15 (1): 195-218. 10.1208/s12248-012-9432-8.PubMed CentralView ArticlePubMedGoogle Scholar
- Roy S, Levi E, Majumdar A, Sarkar F: Expression of miR-34 is lost in colon cancer which can be re-expressed by a novel agent CDF. J Hematol Oncol. 2012, 5 (1): 58-10.1186/1756-8722-5-58.PubMed CentralView ArticlePubMedGoogle Scholar
- Lin L, Deangelis S, Foust E, Fuchs J, Li CL, Li PK, Schwartz EB, Lesinski GB, Benson D, Lu JG: A novel small molecule inhibits STAT3 phosphorylation and DNA binding activity and exhibits potent growth suppressive activity in human cancer cells. Mol Cancer. 2010, 9: 217-10.1186/1476-4598-9-217.PubMed CentralView ArticlePubMedGoogle Scholar
- Lin L, Hutzen B, Ball S, Foust E, Sobo M, Deangelis S, Pandit B, Friedman L, Li CL, Li PK: New curcumin analogues exhibit enhanced growth-suppressive activity and inhibit AKT and signal transducer and activator of transcription 3 phosphorylation in breast and prostate cancer cells. Cancer Sci. 2009, 100 (9): 1719-1727. 10.1111/j.1349-7006.2009.01220.x.View ArticlePubMedGoogle Scholar
- Lin L, Hutzen B, Zuo MX, Ball S, Deangelis S, Foust E, Pandit B, Ihnat MA, Shenoy SS, Kulp S: Novel STAT3 phosphorylation inhibitors exhibit potent growth-suppressive activity in pancreatic and breast cancer cells. Cancer Res. 2010, 70 (6): 2445-2454. 10.1158/0008-5472.CAN-09-2468.PubMed CentralView ArticlePubMedGoogle Scholar
- Liu Y, Fuchs J, Li CL, Lin JY: IL-6, a risk factor for hepatocellular carcinoma FLLL32 inhibits IL-6-induced STAT3 phosphorylation in human hepatocellular cancer cells. Cell Cycle. 2010, 9 (17): 3423-3427. 10.4161/cc.9.17.12946.View ArticlePubMedGoogle Scholar
- Abuzeid WM, Davis S, Tang AL, Saunders L, Brenner JC, Lin JY, Fuchs JR, Light E, Bradford CR, Prince MEP: Sensitization of head and neck cancer to cisplatin through the Use of a novel curcumin analog. Arch Otolaryngol Head Neck Surg. 2011, 137 (5): 499-507. 10.1001/archoto.2011.63.PubMed CentralView ArticlePubMedGoogle Scholar
- Bill MA, Nicholas C, Mace TA, Etter JP, Li CL, Schwartz EB, Fuchs JR, Young GS, Lin L, Lin JY: Structurally modified curcumin analogs inhibit STAT3 phosphorylation and promote apoptosis of human renal cell carcinoma and melanoma cell lines. PLoS One. 2012, 7 (8): e40724-10.1371/journal.pone.0040724.PubMed CentralView ArticlePubMedGoogle Scholar
- Onimoe GI, Liu AG, Lin L, Wei CC, Schwartz EB, Bhasin D, Li CL, Fuchs JR, Li PK, Houghton P: Small molecules, LLL12 and FLLL32, inhibit STAT3 and exhibit potent growth suppressive activity in osteosarcoma cells and tumor growth in mice. Invest New Drugs. 2012, 30 (3): 916-926. 10.1007/s10637-011-9645-1.View ArticlePubMedGoogle Scholar
- Wei CC, Ball S, Lin L, Liu AG, Fuchs JR, Li PK, Li CL, Lin JY: Two small molecule compounds, LLL12 and FLLL32, exhibit potent inhibitory activity on STAT3 in human rhabdomyosarcoma cells. Int J Oncol. 2011, 38 (1): 279-285.PubMedGoogle Scholar
- Xu X, Kasembeli MM, Jiang XQ, Tweardy BJ, Tweardy DJ: Chemical probes that competitively and selectively inhibit Stat3 activation. PLoS One. 2009, 4 (3): e4783-10.1371/journal.pone.0004783.PubMed CentralView ArticlePubMedGoogle Scholar
- Redell MS, Ruiz MJ, Alonzo TA, Gerbing RB, Tweardy DJ: Stat3 signaling in acute myeloid leukemia: ligand-dependent and -independent activation and induction of apoptosis by a novel small-molecule Stat3 inhibitor. Blood. 2011, 117 (21): 5701-5709. 10.1182/blood-2010-04-280123.PubMed CentralView ArticlePubMedGoogle Scholar
- Yu WY, Xiao H, Lin JY, Li CL: Discovery of novel STAT3 small molecule inhibitors via in silico site-directed fragment-based drug design. J Med Chem. 2013, 56 (11): 4402-4412. 10.1021/jm400080c.View ArticlePubMedGoogle Scholar
- Muller J, Schust J, Berg T: A high-throughput assay for signal transducer and activator of transcription 5b based on fluorescence polarization. Anal Biochem. 2008, 375 (2): 249-254. 10.1016/j.ab.2008.01.017.View ArticlePubMedGoogle Scholar
- Page BDG, Khoury H, Laister RC, Fletcher S, Vellozo M, Manzoli A, Yue PB, Turkson J, Minden MD, Gunning PT: Small molecule STAT5-SH2 domain inhibitors exhibit potent antileukemia activity. J Med Chem. 2012, 55 (3): 1047-1055. 10.1021/jm200720n.View ArticlePubMedGoogle Scholar
- Turkson J, Zhang SM, Palmer J, Kay H, Stanko J, Mora LB, Sebti S, Yu H, Jove R: Inhibition of constitutive signal transducer and activator of transcription 3 activation by novel platinum complexes with potent antitumor activity. Mol Cancer Ther. 2004, 3 (12): 1533-1542.PubMedGoogle Scholar
- Turkson J, Zhang SM, Mora LB, Burns A, Sebti S, Jove R: A novel platinum compound inhibits constitutive Stat3 signaling and induces cell cycle arrest and apoptosis of malignant cells. J Biol Chem. 2005, 280 (38): 32979-32988. 10.1074/jbc.M502694200.View ArticlePubMedGoogle Scholar
- Hellsten R, Johansson M, Dahlman A, Dizeyi N, Sterner O, Bjartell A: Galiellalactone is a novel therapeutic candidate against hormone-refractory prostate cancer expressing activated Stat3. Prostate. 2008, 68 (3): 269-280. 10.1002/pros.20699.View ArticlePubMedGoogle Scholar
- Filippakopoulos P, Picaud S, Mangos M, Keates T, Lambert JP, Barsyte-Lovejoy D, Felletar I, Volkmer R, Muller S, Pawson T: Histone recognition and large-scale structural analysis of the human bromodomain family. Cell. 2012, 149 (1): 214-231. 10.1016/j.cell.2012.02.013.PubMed CentralView ArticlePubMedGoogle Scholar
- Muller S, Filippakopoulos P, Knapp S: Bromodomains as therapeutic targets. Expert Rev Mol Med. 2011, 13: 1-21.View ArticleGoogle Scholar
- Liu SH, Walker S, Nelson E, Cirulli R, Xiang M, Qi J, Bradner JE, Frank D: Targeting STAT5 in leukemia through inhibition of bromodomain proteins. Blood. 2012, 120 (21): abstr#399-Google Scholar
- Gu J, Li G, Sun T, Su Y, Zhang X, Shen J, Tian Z, Zhang J: Blockage of the STAT3 signaling pathway with a decoy oligonucleotide suppresses growth of human malignant glioma cells. J Neurooncol. 2008, 89 (1): 9-17. 10.1007/s11060-008-9590-9.View ArticlePubMedGoogle Scholar
- Leong PL, Andrews GA, Johnson DE, Dyer KF, Xi SC, Mai JC, Robbins PD, Gadiparthi S, Burke NA, Watkins SF: Targeted inhibition of Stat3 with a decoy oligonucleotide abrogates head and neck cancer cell growth. Proc Natl Acad Sci USA. 2003, 100 (7): 4138-4143. 10.1073/pnas.0534764100.PubMed CentralView ArticlePubMedGoogle Scholar
- Souissi I, Ladam P, Cognet JAH, Le Coquil S, Varin-Blank N, Baran-Marszak F, Metelev V, Fagard R: A STAT3-inhibitory hairpin decoy oligodeoxynucleotide discriminates between STAT1 and STAT3 and induces death in a human colon carcinoma cell line. Mol Cancer. 2012, 11: 12-10.1186/1476-4598-11-12.PubMed CentralView ArticlePubMedGoogle Scholar
- Souissi I, Najjar I, Ah-Koon L, Schischmanoff PO, Lesage D, Le Coquil S, Roger C, Dusanter-Fourt I, Varin-Blank N, Cao A: A STAT3-decoy oligonucleotide induces cell death in a human colorectal carcinoma cell line by blocking nuclear transfer of STAT3 and STAT3-bound NF-kappaB. BMC Cell Biol. 2011, 12: 14-10.1186/1471-2121-12-14.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang X, Zhang J, Wang L, Wei H, Tian Z: Therapeutic effects of STAT3 decoy oligodeoxynucleotide on human lung cancer in xenograft mice. BMC Cancer. 2007, 7: 149-10.1186/1471-2407-7-149.PubMed CentralView ArticlePubMedGoogle Scholar
- Wang X, Zeng J, Shi M, Zhao S, Bai W, Cao W, Tu Z, Huang Z, Feng W: Targeted blockage of signal transducer and activator of transcription 5 signaling pathway with decoy oligodeoxynucleotides suppresses leukemic K562 cell growth. DNA Cell Biol. 2011, 30 (2): 71-78. 10.1089/dna.2010.1112.PubMed CentralView ArticlePubMedGoogle Scholar
- Tomita N, Kashihara N, Morishita R: Transcription factor decoy oligonucleotide-based therapeutic strategy for renal disease. Clin Exp Nephrol. 2007, 11 (1): 7-17. 10.1007/s10157-007-0459-6.View ArticlePubMedGoogle Scholar
- Tomita N, Ogihara T, Morishita R: Transcription factors as molecular targets: molecular mechanisms of decoy ODN and their design. Curr Drug Targets. 2003, 4 (8): 603-608. 10.2174/1389450033490803.View ArticlePubMedGoogle Scholar
- Sen M, Tosca PJ, Zwayer C, Ryan MJ, Johnson JD, Knostman KAB, Giclas PC, Peggins JO, Tomaszewski JE, McMurray TP: Lack of toxicity of a STAT3 decoy oligonucleotide. Cancer Chemother Pharmacol. 2009, 63 (6): 983-995. 10.1007/s00280-008-0823-6.PubMed CentralView ArticlePubMedGoogle Scholar
- McGowan MP, Tardif JC, Ceska R, Burgess LJ, Soran H, Gouni-Berthold I, Wagener G, Chasan-Taber S: Randomized, placebo-controlled trial of mipomersen in patients with severe hypercholesterolemia receiving maximally tolerated lipid-lowering therapy. PLoS One. 2012, 7 (11): e49006-10.1371/journal.pone.0049006.PubMed CentralView ArticlePubMedGoogle Scholar
- Stein EA, Dufour R, Gagne C, Gaudet D, East C, Donovan JM, Chin W, Tribble DL, McGowan M: Apolipoprotein B synthesis inhibition with mipomersen in heterozygous familial hypercholesterolemia: results of a randomized, double-blind, placebo-controlled trial to assess efficacy and safety as add-on therapy in patients with coronary artery disease. Circulation. 2012, 126 (19): 2283-2292. 10.1161/CIRCULATIONAHA.112.104125.View ArticlePubMedGoogle Scholar
- Hong DS, Younes A, Fayad L, Fowler NH, Hagemeister FB, Mistry R, Nemunaitis JJ, Borad MJ, Bryce AH, Yamashita M: A phase I study of ISIS 481464 (AZD9150), a first-in-human, first-in-class, antisense oligonucleotide inhibitor of STAT3, in patients with advanced cancers. J Clin Oncol. 2013, 31 (suppl): 8523-Google Scholar
- Rao DD, Vorhies JS, Senzer N, Nemunaitis J: SiRNA vs. ShRNA: similarities and differences. Adv Drug Deliv Rev. 2009, 61 (9): 746-759. 10.1016/j.addr.2009.04.004.View ArticlePubMedGoogle Scholar
- Kaymaz BT, Selvi N, Gunduz C, Aktan C, Dalmizrak A, Saydam G, Kosova B: Repression of STAT3, STAT5A, and STAT5B expressions in chronic myelogenous leukemia cell line K-562 with unmodified or chemically modified siRNAs and induction of apoptosis. Ann Hematol. 2013, 92 (2): 151-162. 10.1007/s00277-012-1575-2.View ArticlePubMedGoogle Scholar
- Klosek SK, Nakashiro KC, Hara S, Goda H, Hamakawa H: Stat3 as a molecular target in RNA interference-based treatment of oral squamous cell carcinoma. Oncol Rep. 2008, 20 (4): 873-878.PubMedGoogle Scholar
- Konnikova L, Kotecki M, Kruger MM, Cochran BH: Knockdown of STAT3 expression by RNAi induces apoptosis in astrocytoma cells. BMC Cancer. 2003, 3: 23-10.1186/1471-2407-3-23.PubMed CentralView ArticlePubMedGoogle Scholar
- Kunigal S, Lakka SS, Sodadasu PK, Estes N, Rao JS: Stat3-siRNA induces Fas-mediated apoptosis in vitro and in vivo in breast cancer. Int J Oncol. 2009, 34 (5): 1209-1220.PubMed CentralPubMedGoogle Scholar
- Ma YL, Kowolik CM, Swiderski PM, Kortylewski M, Yu H, Horne DA, Jove R, Caballero OL, Simpson AJG, Lee FT: Humanized Lewis-Y Specific Antibody Based Delivery of STAT3 siRNA. ACS Chem Biol. 2011, 6 (9): 962-970. 10.1021/cb200176v.View ArticlePubMedGoogle Scholar
- Verma NK, Davies AM, Long A, Kelleher D, Volkov Y: STAT3 knockdown by siRNA induces apoptosis in human cutaneous T-cell lymphoma line Hut78 via downregulation of Bcl-xL. Cell Mol Biol Lett. 2010, 15 (2): 342-355. 10.2478/s11658-010-0008-2.View ArticlePubMedGoogle Scholar
- Lu YM, Zhang SL, Meng LR, Zhao YY: Influence of human epidermal growth factor receptor-2 siRNA on chemosensitivity to cisplatin of human ovarian carcinoma cells: an in vitro experiment. Zhonghua Yi Xue Za Zhi. 2008, 88 (13): 909-913.PubMedGoogle Scholar
- Yang Z, Cai JH, Xie SJ, Li GX, Song WQ, Yan QH, Yan L, Zhang F: Therapeutic effects of signal transducer and activator of transcription 3 siRNA on human breast cancer in xenograft mice. Chin Med J (Engl). 2011, 124 (12): 1854-1861.Google Scholar
- Zhang L, Zhao Z, Feng Z, Yin N, Lu G, Shan B: RNA interference-mediated silencing of Stat5 induces apoptosis and growth suppression of hepatocellular carcinoma cells. Neoplasma. 2012, 59 (3): 302-309. 10.4149/neo_2012_039.View ArticlePubMedGoogle Scholar
- Moser C, Ruemmele P, Gehmert S, Schenk H, Kreutz MP, Mycielska ME, Hackl C, Kroemer A, Schnitzbauer AA, Stoeltzing O: STAT5b As molecular target in pancreatic cancer-inhibition of tumor growth, angiogenesis, and metastases. Neoplasia. 2012, 14 (10): 915-925.PubMed CentralView ArticlePubMedGoogle Scholar
- Jing NJ, Li YD, Xiong WJ, Sha W, Jing L, Tweardy DJ: G-quartet oligonucleotides: a new class of signal transducer and activator of transcription 3 inhibitors that suppresses growth of prostate and breast tumors through induction of apoptosis. Cancer Res. 2004, 64 (18): 6603-6609. 10.1158/0008-5472.CAN-03-4041.View ArticlePubMedGoogle Scholar
- Reddy KR, Guan Y, Qin G, Zhou Z, Jing N: Combined treatment targeting HIF-1alpha and Stat3 is a potent strategy for prostate cancer therapy. Prostate. 2011, 71 (16): 1796-1809. 10.1002/pros.21397.View ArticlePubMedGoogle Scholar
- Weerasinghe P, Li YF, Guan YL, Zhang RW, Tweardy DJ, Jing NJ: T40214/PEI complex: a potent therapeutics for prostate cancer that targets STAT3 signaling. Prostate. 2008, 68 (13): 1430-1442. 10.1002/pros.20807.PubMed CentralView ArticlePubMedGoogle Scholar
- Cang S, Mukhi N, Wang K, Liu D: Novel CD20 monoclonal antibodies for lymphoma therapy. J Hematol Oncol. 2012, 5: 64-10.1186/1756-8722-5-64.PubMed CentralView ArticlePubMedGoogle Scholar
- Firer M, Gellerman G: Targeted drug delivery for cancer therapy: the other side of antibodies. J Hematol Oncol. 2012, 5 (1): 70-10.1186/1756-8722-5-70.PubMed CentralView ArticlePubMedGoogle Scholar
- Wang K, Wei G, Liu D: CD19: a biomarker for B cell development, lymphoma diagnosis and therapy. Exp Hematol Oncol. 2012, 1 (1): 36-10.1186/2162-3619-1-36.PubMed CentralView ArticlePubMedGoogle Scholar
- Hu C, Huang L, Gest C, Xi X, Janin A, Soria C, Li H, Lu H: Opposite regulation by PI3K/Akt and MAPK/ERK pathways of tissue factor expression, cell-associated procoagulant activity and invasiveness in MDA-MB-231 cells. J Hematol Oncol. 2012, 5 (1): 16-10.1186/1756-8722-5-16.PubMed CentralView ArticlePubMedGoogle Scholar
- Lamba G, Ambrale S, Lee B, Gupta R, Rafiyath S, Liu D: Recent advances and novel agents for gastrointestinal stromal tumor (GIST). J Hematol Oncol. 2012, 5 (1): 21-10.1186/1756-8722-5-21.PubMed CentralView ArticlePubMedGoogle Scholar
- Lamba G, Gupta R, Lee B, Ambrale S, Liu D: Current management and prognostic features for gastrointestinal stromal tumor (GIST). Exp Hematol Oncol. 2012, 1 (1): 14-10.1186/2162-3619-1-14.PubMed CentralView ArticlePubMedGoogle Scholar
- Lee B, Mukhi N, Liu D: Current management and novel agents for malignant melanoma. J Hematol Oncol. 2012, 5 (1): 3-10.1186/1756-8722-5-3.PubMed CentralView ArticlePubMedGoogle Scholar
- Lu K, Wang X: Therapeutic advancement of chronic lymphocytic leukemia. J Hematol Oncol. 2012, 5 (1): 55-10.1186/1756-8722-5-55.PubMed CentralView ArticlePubMedGoogle Scholar
- Randhawa J, Ostojic A, Vrhovac R, Atallah E, Verstovsek S: Splenomegaly in myelofibrosis–new options for therapy and the therapeutic potential of Janus kinase 2 inhibitors. J Hematol Oncol. 2012, 5 (1): 43-10.1186/1756-8722-5-43.PubMed CentralView ArticlePubMedGoogle Scholar
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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.