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Table 2 Ongoing clinical trials to target MDSCs in cancer patients

From: Immunosuppressive cells in cancer: mechanisms and potential therapeutic targets

Target

Agent

Tumor types and combinational therapies

Phase

Sample size

Clinical trial number

CXCR2 inhibitor

AZD5069

Metastatic Castration Resistant Prostate Cancer + Enzalutamide

I/II

86

NCT03177187

SX-682

Pancreatic Cancer + Nivolumab

I

20

NCT04477343

Melanoma + Pembrolizumab

I

77

NCT03161431

CCR5 inhibitor

Vicriviroc

Advanced/Metastatic Microsatellite Stable Colorectal Cancer + Pembrolizumab

II

42

NCT03631407

Maraviroc

Advanced Metastatic Colorectal and Pancreatic Cancer + Nivolumab + Ipilimumab

I

50

NCT04721301

CCR5 antibody

Leronlimab

Locally Advanced or Metastatic Solid Tumors

II

30

NCT04504942

STAT3 inhibitor

OPB-31121

Advanced Cancers

I

24

NCT00955812

AZD9150

Advanced Solid Tumors + Durvalumab

I

76

NCT03421353

WP1066

Recurrent Malignant Glioma and Brain Metastasis from Melanoma

I

33

NCT01904123

TTI-101

Advanced Cancers

I

60

NCT03195699

SC-43

Advanced NSCLC and Advanced Biliary Tract Cancer + Cisplatin

I/II

100

NCT04733521

OPB-51602

Advanced Cancer

I

45

NCT01423903

JAK/STAT3 inhibitor

Ruxolitinib

Head and Neck Squamous Cell Carcinoma

II

45

NCT03153982

PDE5 inhibitor

Tadalafil

Head and Neck Squamous Cell Carcinoma

II

40

NCT01697800

Sildenafil

Solid Tumor + Regorafenib

I

32

NCT02466802

COX2 inhibitor

Celecoxib

Lung Cancer + Radiation Therapy

I/II

21

NCT00046839

Colon Carcinoma + Nivolumab/Ipilimumab

II

60

NCT03026140

Breast Cancer

III

2639

NCT02429427

Cervix Neoplasms

I/II

31

NCT00152828

Endometrium Cancer

II

48

NCT03896113

HDAC inhibitor

Entinostat

Metastatic Colorectal Cancer + Azacitidine

II

47

NCT01105377

Vorinostat

Locally Advanced NSCLC + Chemotherapy and Radiation Therapy

I

18

NCT01059552

Malignant Solid Tumor + Hydroxychloroquine

I

72

NCT01023737

Quisinostat

NSCLC/Epithelial Ovarian Cancer + Chemotherapy

I

51

NCT02728492

SB939

Prostate Cancer

II

32

NCT01075308

Panobinostat

Melanoma + Ipilimumab

I

17

NCT02032810

Chidamide

Cervical Cancer + Toripalimab

I/II

40

NCT04651127

CHR-3996

Solid Tumor

I

40

NCT00697879

Vitamins

ATRA

Breast Cancer + Anastrozole

II

112

NCT04113863

Pancreatic Cancer + Chemotherapy

II

170

NCT04241276

Prostate Cancer + 5-Azacitidine + Lupron

II

20

NCT03572387

Melanoma + Pembrolizumab

I/II

26

NCT03200847

Casein kinase inhibitor

Silmitasertib (CX 4945)

Advanced Basal Cell Carcinoma

I

26

NCT03897036

Cholangiocarcinoma + Chemotherapy

I/II

127

NCT02128282

Chemotherapy

Low-Dose Capecitabine + Bevacizumab

Glioblastoma

I

12

NCT02669173

LXR Agonist

RGX-104

Malignant Neoplasms + Immunotherapy/Chemotherapy

I

135

NCT02922764

Tyrosine kinase inhibitor

Pazopanib

Solid Tumors

II

57

NCT01956669

Solid Tumors + Topotecan

I/II

66

NCT02303028

Sarcoma + Durvalumab

II

37

NCT03798106

Ibrutinib

Malignant Solid Tumors + Nivolumab

I

15

NCT03525925

Lung Cancer

I/II

13

NCT02321540

Gastroesophageal Cancer

II

17

NCT02884453