BRAF inhibition improves tumor recognition by the immune system: Potential implications for combinatorial therapies against melanoma involving adoptive T-cell transfer
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BRAF inhibition improves tumor recognition by the immune system : Potential implications for combinatorial therapies against melanoma involving adoptive T-cell transfer. / Donia, Marco; Fagone, Paolo; Nicoletti, Ferdinando; Andersen, Rikke Sick; Høgdall, Estrid; Straten, Per Thor; Andersen, Mads Hald; Svane, Inge Marie.
I: OncoImmunology, Bind 1, Nr. 9, 2012, s. 1476-1483.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - BRAF inhibition improves tumor recognition by the immune system
T2 - Potential implications for combinatorial therapies against melanoma involving adoptive T-cell transfer
AU - Donia, Marco
AU - Fagone, Paolo
AU - Nicoletti, Ferdinando
AU - Andersen, Rikke Sick
AU - Høgdall, Estrid
AU - Straten, Per Thor
AU - Andersen, Mads Hald
AU - Svane, Inge Marie
PY - 2012
Y1 - 2012
N2 - In spite of the fact that they occur at high rates, the clinical responses of BRAF(V600) mutant metastatic melanoma to BRAF inhibitors are usually short-lasting, with most cases progressing within less than 8 mo. Immunomodulatory strategies initiated after progression have recently been reported to be poorly efficient. By characterizing the immunological interactions between T cells and cancer cells in clinical material as well as the influence of the FDA-approved BRAF inhibitor vemurafenib on the immune system, we aimed at unraveling new strategies to expand the efficacy of adoptive T-cell transfer, which represents one of the most promising approaches currently in clinical development for the treatment of metastatic melanoma. Here we show that blocking the BRAF-MAPK pathway in BRAF signaling-addicted melanoma cells significantly increases the ability of T cells contained in clinical grade tumor-infiltrating lymphocytes to recognize autologous BRAF(V600) mutant melanoma cell lines in vitro. Antitumor reactivity was improved regardless of the class of antigen recognized by tumor-specific CD8(+) T cells. Microarray data suggests that improved tumor recognition is associated with modified expression of MHC Class I-associated proteins as well as of heat-shock proteins. In conclusion, our preclinical data suggest that an appropriately timed sequential treatment of BRAF(V600) mutant melanoma with vemurafenib and adoptive T-cell transfer might result in synergistic antineoplastic effects owing to an increased immunogenicity of cancer cells.
AB - In spite of the fact that they occur at high rates, the clinical responses of BRAF(V600) mutant metastatic melanoma to BRAF inhibitors are usually short-lasting, with most cases progressing within less than 8 mo. Immunomodulatory strategies initiated after progression have recently been reported to be poorly efficient. By characterizing the immunological interactions between T cells and cancer cells in clinical material as well as the influence of the FDA-approved BRAF inhibitor vemurafenib on the immune system, we aimed at unraveling new strategies to expand the efficacy of adoptive T-cell transfer, which represents one of the most promising approaches currently in clinical development for the treatment of metastatic melanoma. Here we show that blocking the BRAF-MAPK pathway in BRAF signaling-addicted melanoma cells significantly increases the ability of T cells contained in clinical grade tumor-infiltrating lymphocytes to recognize autologous BRAF(V600) mutant melanoma cell lines in vitro. Antitumor reactivity was improved regardless of the class of antigen recognized by tumor-specific CD8(+) T cells. Microarray data suggests that improved tumor recognition is associated with modified expression of MHC Class I-associated proteins as well as of heat-shock proteins. In conclusion, our preclinical data suggest that an appropriately timed sequential treatment of BRAF(V600) mutant melanoma with vemurafenib and adoptive T-cell transfer might result in synergistic antineoplastic effects owing to an increased immunogenicity of cancer cells.
U2 - 10.4161/onci.21940
DO - 10.4161/onci.21940
M3 - Journal article
VL - 1
SP - 1476
EP - 1483
JO - OncoImmunology
JF - OncoImmunology
SN - 2162-4011
IS - 9
ER -
ID: 48579892