2021 Fiscal Year Final Research Report
Analysis of renin-angiotensin system in the carcinogenesis of prostate cancer
Project/Area Number |
19K09695
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 56030:Urology-related
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Research Institution | Yokohama City University |
Principal Investigator |
Uemura Hiroji 横浜市立大学, 附属市民総合医療センター, 准教授 (50244439)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 前立腺癌 / レニン-アンジオテンシン系 / prorenin receptor / AT2レセプターリガンド / PD-L1 |
Outline of Final Research Achievements |
The Western blot and RT-PCR resulted that PD-L1 expression was decrease by C21 treatment in prostate cancer cells. On the other hand, PD-L1 expression was increased by ARB in LNCaP and PC3 cells. These results suggest that ARB may induce the function of immune check point inhibitors in prostate cancer cells. Next, we examined the influence of prorenin receptor and AT1 receptors on androgen receptor. We performed western blot and RT-PCR to examine the (p)RR expression in prostate cancer cells. Furthermore, we investigated the change of (p)RR by DHT treatment in LNCaP cells, which showed the increasing of (p)RR. Recently, cell membrane AR (mAR) has been recognized in prostate cancer cells. We will investigate the relationship between (p)RR and mAR.
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Free Research Field |
泌尿器科学
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Academic Significance and Societal Importance of the Research Achievements |
ARBがPD-L1発現を亢進することは、免疫チェックポイント阻害剤(ICI)の有効性を誘導する可能性がある。前立腺癌はMSI-Hの発現が高くなく、ICIが効きにくいといわれている。したがって、ARBによるPD-L1発現亢進は、抗腫瘍効果を有するICIの適応を高める可能性があり、去勢抵抗性前立腺癌(CRPC)の治療に有用であると考えられる。CRPC治療は、ホルモン剤や化学療法などの併用だけでなく、ICIの併用が考慮されている。今後、ICIとの併用が現実的になる場合、ARB併用の抗腫瘍効果が期待できる。また、(p)RR発現との関係を調べていくことは、新たな前立腺癌治療の開発に繋がる。
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