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2021 Fiscal Year Final Research Report

Development of a next-generation viral agent targeting immunosuppression by crosstalk in the pancreatic cancer microenvironment

Research Project

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Project/Area Number 19H03731
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionOkayama University

Principal Investigator

Fujiwara Toshiyoshi  岡山大学, 医歯薬学域, 教授 (00304303)

Co-Investigator(Kenkyū-buntansha) 黒田 新士  岡山大学, 大学病院, 助教 (60633758)
吉田 龍一  岡山大学, 大学病院, 講師 (80534768)
田澤 大  岡山大学, 大学病院, 准教授 (90415513)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords癌 / 遺伝子 / 細胞・組織 / 医療・福祉 / トランスレーショナルリサーチ
Outline of Final Research Achievements

We examined the effect of OBP-702, a next-generation armed adenovirus OBP-702, which carries the multifunctional tumor suppressor p53 gene, on the immunosuppressive pancreatic cancer microenvironment. Pancreatic cancer stromal cells (human pancreatic stellate cells: hPSC) promoted tumor growth by coexisting with pancreatic cancer cells in the pancreatic cancer microenvironment, and OBP-702 produced strong p53 gene expression in hPSC. By inducing selective apoptosis, in addition to the antitumor effect on the pancreatic cancer cells, OBP-702 exhibited a profound antitumor activity through the control of the pancreatic cancer microenvironment.

Free Research Field

消化器外科学

Academic Significance and Societal Importance of the Research Achievements

膵癌微小環境において、膵癌間質細胞hPSCは膵癌細胞と共存することで腫瘍増殖を促進しており、OBP-702は膵癌細胞自体への抗腫瘍効果に加えて膵癌微小環境の制御を介した統合的な抗腫瘍活性を発揮した。間質細胞を標的とすることで他の種々の細胞とのクロストークに関わる様々な分子を制御することができ、がん細胞のみを狙った既存のコンセプトとは異なる革新的な治療法の開発につながる可能性がある。

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Published: 2023-01-30  

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