Immunomonitoring in gastrointesrinal cancer patients for development of chemoimmunotherapy

2016 Fiscal Year Final Research Report

• Project/Area Number: 26460981
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Gastroenterology
• Research Institution: National Cancer Center Japan
• Principal Investigator: Kitano Shigehisa 国立研究開発法人国立がん研究センター, 早期・探索臨床研究センター, 医員 (60402682)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 腫瘍免疫学 / がん免疫療法 / バイオマーカー

Outline of Final Research Achievements

Immune monitoring revealed that the number of monocytic MDSC (myeloid - derived suppressor cell) and effector memory T cells before treatment was associated with PFS. In advanced gastric cancer patients who underwent standard chemotherapy the number of granulocytic MDSC was associated with PFS. In addition, by immune analysis of peripheral blood and tumor local site in the other cancer patients (malignant melanoma, esophageal cancer, cervical cancer, prostate cancer etc.), the number of MDSC, tumor associated macrophage (TAM;M2 type) and effector cells, and their ratio was associated with clinical benefit (OS, PFS). In this study, we also have detected candidate of the molecular target on MDSC. As the next treatment strategy, it is worth trying evaluation of combination immunotherapy including reagents to suppress immunosuppressive cells and/or its related factors will contribute to enhance antitumor effect and to improve OS or not.

Free Research Field

腫瘍免疫学、腫瘍内科学、内科学、