2022 Fiscal Year Final Research Report
Improvement of immune checkpoint inhibition therapy for the treatment of pancreatic cancer
Project/Area Number |
21K19743
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 59:Sports sciences, physical education, health sciences, and related fields
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Research Institution | Doshisha University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
和久 剛 同志社大学, 生命医科学部, 准教授 (40613584)
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Project Period (FY) |
2021-07-09 – 2023-03-31
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Keywords | がん / 代謝 / LDHA / NRF3 / 膵臓がん / 乳酸 / CTGF / 腫瘍悪性化機構 |
Outline of Final Research Achievements |
The objective of this investigation was to examine the plausibility of the transcription factor NRF3's capacity to promote lactate production in pancreatic cancer, explore the impact of its suppression on T cells, and develop a novel treatment approach to address immune checkpoint inhibition therapy. Unfortunately, our findings have demonstrated that NRF3 enhances the mRNA expression but fails to augment the protein-level expression of the lactate synthase LDHA in pancreatic cancer. This is because of the substantial expression of the LDHA protein in normal cells. Instead, our study has uncovered a critical role of NRF3 in pancreatic cancer growth. This unexpected outcome implies that NRF3 could serve as a fresh therapeutic target for refractory pancreatic cancer.
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Free Research Field |
腫瘍生物学
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Academic Significance and Societal Importance of the Research Achievements |
医学の発展により、がんは早期発見されれば治療できる疾患になりつつあるが、膵臓がんは未だに5年生存率が10%を切り、難治性のままに至っている。したがって膵臓がんの克服は喫緊の課題になっている。膵臓がんが難治性である要因の1つに、奏功する抗がん剤が少ない点にある。したがって本研究成果は、膵臓がんの新たな治療ターゲット候補として、NRF3が有用であることを意味する。NRF3の転写因子としての活性はタンパク質切断酵素DDI2により制御されていることから、DDI2阻害剤はNRF3の阻害を介した膵がん治療薬につながる可能性が期待される。
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