• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2019 Fiscal Year Final Research Report

Establishment of a humoral immunity evaluation system based on the pregnant immunity system

Research Project

  • PDF
Project/Area Number 17H03571
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Laboratory animal science
Research InstitutionTokai University

Principal Investigator

KAMETANI Yoshie  東海大学, 医学部, 准教授 (50338787)

Co-Investigator(Kenkyū-buntansha) 真鍋 良幸  大阪大学, 理学研究科, 助教 (00632093)
伊藤 亮治  公益財団法人実験動物中央研究所, 実験動物研究部, 室長代理 (60425436)
徳田 裕  東海大学, 医学部, 客員教授 (20163975)
Project Period (FY) 2017-04-01 – 2020-03-31
Keywordsヒト化マウス / 妊娠免疫 / ワクチン
Outline of Final Research Achievements

We established a tumor-bearing immune environment in human IL-4-producing NOG mouse by transplanting peripheral blood mononuclear cells (PBMC) of healthy donor (HD) and breast cancer (BC) patients. These mice were immunized with HER2 peptide vaccine candidate CH401MAP. We found that in BC mice with the tumor-bearing environment, cytotoxic T cells and specific antibody production after the immunization were significantly reduced. Nivolumab injection decreased PD-1-positive exhausted T cell ratio and increased CD25 positive activated T cell ratio in HD mice, but in BC mice, the Nivolumab did not enhance the activated cytotoxic T cell ratio. Similar phenomena are observed in the mouse transplanted with in HD mice whose PBMC were shortly cultured with glucocorticoid before transplantation but not in the mice with progesterone-treated PBMC.

Free Research Field

免疫学

Academic Significance and Societal Importance of the Research Achievements

本研究では、妊娠というイベントに伴う他者の受容とTh2への免疫系のシフトの機構を利用してGVHDを抑制する、新たなコンセプトのヒト化マウスを確立した。この系は、個別の患者がん環境を構築したマウスにおける抗がん剤の奏功の評価が可能であるのみならず、妊娠免疫という他者の受容を目的とする特殊な免疫環境を調節するプロゲステロンと、ストレスホルモンであるグルココルチコイドがどのように異なる免疫調節作用を持つかをin vivoにて明らかにした。本研究は特に免疫チェックポイント抗体の腫瘍免疫における役割を明確にするなど、今後の治療法開発の評価系としての可能性を大きく広げたと考えられる。

URL: 

Published: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi