SEMAPHORIN-4D ANTAGONISTS FOR USE IN CANCER THERAPY
The disclosure relates to methods for treating cancer comprising determining certain patient biomarker levels prior to treatment.
1 . A method for treating, inhibiting, delaying, or reducing malignant cell growth in a subject with cancer and in need of treatment, comprising:
(a) determining the subject's level of circulating myeloid-derived suppressor cells (MDSCs) by;
(b) obtaining or having obtained a biological sample from the subject;
(c) performing or having performed an assay on the biological sample to determine the level of MDSCs in the biological sample; and
(d) administering to the subject an effective amount of a cancer immunotherapy regimen comprising an isolated antibody or antigen-binding fragment thereof that specifically binds to semaphorin-4D (SEMA4D) if the level of MDSCs is below a predetermined threshold level, thereby treating the subject.
2 . The method of claim [ 076 ], wherein the anti-SEMA4D antibody or fragment thereof inhibits SEMA4D interaction with its receptor.
3 . The method of claim [ 079 ], wherein the receptor is Plexin-B1, Plexin-B2, CD72, or any combination thereof.
4 . The method of claim 3 , wherein the antibody or fragment thereof inhibits SEMA4D-mediated signal transduction.
5 . The method of claim [ 076 ], wherein the antibody or fragment thereof comprises a variable heavy chain (VH) comprising VH CDRs 1-3 comprising SEQ ID NOS: 2, 3, and 4, respectively, and a variable light chain (VL) comprising VL CDRs 1-3 comprising SEQ ID NOS: 6, 7, and 8, respectively.
6 . The method of claim 5 , wherein the VH and VL comprise, respectively, SEQ ID NO: 1 and SEQ ID NO: 5, or SEQ ID NO: 9 and SEQ ID NO: 10.
7 . The method of claim [ 076 ], wherein the cancer immunotherapy regimen further comprises an additional cancer immunotherapy agent.
8 . The method of claim [ 080 ], wherein the additional cancer immunotherapy agent comprises an immune checkpoint blockade.
9 . The method of claim [ 080 ], wherein the agent that inhibits an immune checkpoint blockade comprises an antibody or antigen-binding fragment thereof that specifically binds to CTLA4, PD-1, PD-L1, LAG3, TIM3, B7-H3, or any combination thereof.
10 . The method of claim [ 080 ], wherein the antibody or antigen-binding fragment thereof comprises the anti-PD-L1 antibody Avelumab.
11 . The method of claim [ 076 ], wherein the MDSCs are mononuclear MDSCs (M-MDSCs).
12 . The method of claim [ 077 ], wherein the M-MDSCs comprise a CD14, HLA-DR −/low , CD11b + , CD33 + , Ln − phenotype, wherein Ln is a cocktail of markers that define non-MDSCs.
13 . The method of claim [ 078 ], wherein the Ln markers comprise one or more of CD3, CD19, or CD56.
14 . The method of claim [ 076 ], wherein the predetermined threshold level of MDSCs comprises less than 50%, less than 40%, less than 30%, less than 20%, or less than 10% of the subject's total peripheral blood mononuclear cells prior to treatment.
15 . The method of claim 1 , wherein the immunotyping assay is a flow cytometric-based immunophenotypic assay.
16 . The method of claim 1 , wherein the biological sample is a blood sample or a tumor biopsy sample.
17 . The method of claim [ 076 ], wherein the cancer comprises a solid tumor, a hematological malignancy, any metastasis thereof, or any combination thereof.
18 . The method of claim [ 081 ] 7 , wherein the cancer is a solid tumor or metastasis thereof.
19 . The method of claim 188 , wherein the solid tumor is a sarcoma, a carcinoma, a melanoma, any metastases thereof, or any combination thereof.
20 . The method of claim [ 081 ] 8 , wherein the solid tumor is squamous cell carcinoma, adenocarcinoma, basal cell carcinoma, renal cell carcinoma, ductal carcinoma of the breast, soft tissue sarcoma, osteosarcoma, melanoma, small-cell lung cancer, non-small cell lung cancer, adenocarcinoma of the lung, cancer of the peritoneum, hepatocellular carcinoma, gastrointestinal cancer, gastric cancer, pancreatic cancer, neuroendocrine cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, brain cancer, hepatoma, breast cancer, colon cancer, colorectal cancer, endometrial or uterine carcinoma, esophageal cancer, salivary gland carcinoma, kidney cancer, liver cancer, prostate cancer, vulval cancer, thyroid cancer, head and neck cancer, any metastases thereof, or any combination thereof.
21 . The method of claim 20 , wherein the solid tumor is non-small cell lung cancer.
22 . The method of claim [ 081 ] 7 , wherein the cancer is a hematologic malignancy or metastasis thereof.
23 . The method of claim 222 , wherein the hematologic malignancy is leukemia, lymphoma, myeloma, acute myeloid leukemia, chronic myeloid leukemia, acute lymphocytic leukemia, chronic lymphocytic leukemia, hairy cell leukemia, Hodgkin lymphoma, non-Hodgkin lymphoma, multiple myeloma, any metastases thereof, or any combination thereof.
24 . The method of claim [ 076 ], further comprising administration of an additional cancer therapy.
25 . The method of claim [ 082 ] 4 , wherein the additional therapy comprises surgery, chemotherapy, radiation therapy, a cancer vaccine, administration of an immunostimulatory agent, adoptive T cell therapy, administration of a regulatory T cell (Treg) modulator, or any combination thereof.
26 . A method for selecting a subject with cancer for treating, inhibiting, delaying, or reducing malignant cell growth in the subject with a cancer immunotherapy regimen comprising an isolated antibody or antigen-binding fragment thereof that specifically binds to semaphorin-4D (SEMA4D), the method comprising:
(a) determining the subject's level of circulating myeloid-derived suppressor cells (MDSCs) in a sample obtained from the subject; and
(b) selecting the subject for treatment if the level of MDSCs in the sample is below a predetermined threshold level.
27 . The method of claim 26 , wherein the anti-SEMA4D antibody or fragment thereof inhibits SEMA4D interaction with its receptor.
28 . The method of claim 26 , wherein the receptor is Plexin-B1, Plexin-B2, CD72, or any combination thereof.
29 . The method of claim 27 , wherein the antibody or fragment thereof inhibits SEMA4D-mediated signal transduction.
30 . The method of claim 26 , wherein the antibody or fragment thereof comprises a variable heavy chain (VH) comprising VH CDRs 1-3 comprising SEQ ID NOS: 2, 3, and 4, respectively, and a variable light chain (VL) comprising VL CDRs 1-3 comprising SEQ ID NOS: 6, 7, and 8, respectively.
31 . The method of claim 26 , wherein the predetermined threshold level of MDSCs comprises less than 50%, less than 40%, less than 30%, less than 20%, or less than 10% of the subject's total peripheral blood mononuclear cells prior to treatment.