Compositions containing tucaresol or its analogs

1. A method for treating a cancer, comprising co-administering a compound of Formula (I):

Y 1 is selected from hydroxyl, C 1-4 alkylamino and acylamino having a C 1-4 alkyl moiety thereof;

Y 2 , Y 3 and Y 4 are independently selected from hydrogen, halogen, C 1-4 alkyl, C 1-4 alkoxy, trifluoromethyl, hydroxyl and benzyloxy; and

Q 1 is either

where Q 2 and Q 3 are independently selected from hydrogen and C 1-4 alkyl;

X is selected from cyano, carboxyl or a derivative thereof, 5-tetrazolyl and alkylsulfonylcarbamyl having a C 1-6 alkyl moiety thereof; and

n is 0 or an integer selected from 1, 2, 3, 4, 5 and 6, and a pharmaceutically acceptable salt thereof; and

one or more immune checkpoint inhibitor to a subject in need thereof,

wherein the one or more immune checkpoint inhibitor is an inhibitor of PD-1, PD-L1, PD-L2, PD-L3, PD-L4 or CTLA-4,

wherein the cancer cells express a binding ligand of PD-1 or a binding ligand of CTLA-4.

2. The method of claim 1 , further comprising co-administering one or more additional chemotherapeutic agent.

3. The method of claim 1 , wherein the binding ligand of PD-1 is PD-L1 or PD-L2.

4. The method of claim 3 , further comprising identifying cancer cells expressing PD-L1, PD-L2, or a binding ligand of PD-1.

5. The method of claim 1 , wherein the cancer is head and neck cancer, lung cancer, stomach cancer, colon cancer, pancreatic cancer, prostate cancer, breast cancer, kidney cancer, bladder cancer, ovary cancer, cervical cancer, melanoma, glioblastoma, myeloma, lymphoma, or leukemia.

6. The method of claim 1 , wherein the cancer is renal cell carcinoma, malignant melanoma, non-small cell lung cancer (NSCLC), ovarian cancer, Hodgkin's lymphoma or squamous cell carcinoma.

7. The method of claim 1 , wherein the binding ligand of CTLA-4 is B7.1 or B7.2.

8. The method of claim 1 , further comprising identifying cancer cells expressing a binding ligand of CTLA-4.

9. The method of claim 1 , further comprising identifying cancer cells expressing B7.1 or B7.2.

10. The method of claim 1 , wherein the immune checkpoint inhibitor is an inhibitor of PD-1, PD-L1 or CTLA-4.

11. The method of claim 10 , wherein the immune checkpoint inhibitor is an inhibitor of PD-1 or CTLA-4.

12. The method of claim 1 , wherein the immune checkpoint inhibitor is nivolumab, pembrolizumab, pidilizumab, ipilimumab, dacarbazine, BMS 936559, atezolizumab, durvalimumab, or any combinations thereof.

13. The method of claim 1 , further comprising a second immune checkpoint inhibitor, wherein a first immune checkpoint inhibitor is different from the second immune checkpoint inhibitor.

14. The method of claim 13 , wherein the first immune checkpoint inhibitor is a PD-1 inhibitor, and the second immune checkpoint inhibitor is a CTLA-4 inhibitor.

15. The method of claim 1 , wherein the immune checkpoint inhibitor is an antibody.

16. The method of claim 15 , wherein the immune checkpoint inhibitor is a PD-1 antibody, PD-L1 antibody, PD-L2 antibody, or CTLA-4 antibody.

17. The method of claim 16 , wherein the antibody is selected from α-CD3-APC, α-CD3-APC-H7, α-CD4-ECD, α-CD4-PB, α-CD8-PE-Cy7, α-CD-8-PerCP-Cy5.5, α-CD11c-APC, α-CD11b-PE-Cy7, α-CD11b-AF700, α-CD14-FITC, α-CD16-PB, α-CD19-AF780, a-CD19-AF700, α-CD20-PO, α-CD25-PE-Cy7, α-CD40-APC, α-CD45-Biotin, Streptavidin-BV605, α-CD62L-ECD, α-CD69-APC-Cy7, α-CD80-FITC, α-CD83-Biotin, Streptavidin-PE-Cy7, α-CD86-PE-Cy7, α-CD86-PE, α-CD123-PE, α-CD154-PE, α-CD161-PE, α-CTLA4-PE-Cy7, α-FoxP3-AF488 (clone 259D), IgG1-isotype-AF488, α-ICOS (CD278)-PE, α-HLA-A2-PE, α-HLA-DR-PB, α-HLA-DR-PerCPCy5.5, α-PD1-APC, VISTA, co-stimulatory molecule OX40, and CD137.

18. The method of claim 1 , wherein the compound of Formula (I) is tucaresol.