2023 Fiscal Year Final Research Report
Elucidation of tumor immune mechanisms aimed at establishing new immunotherapy for castration-resistant prostate cancer
Project/Area Number |
19K07486
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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 49030:Experimental pathology-related
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Research Institution | Nagoya City University |
Principal Investigator |
Takahashi Satoru 名古屋市立大学, 医薬学総合研究院(医学), 教授 (60254281)
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Co-Investigator(Kenkyū-buntansha) |
内木 綾 名古屋市立大学, 医薬学総合研究院(医学), 准教授 (20509236)
加藤 寛之 名古屋市立大学, 医薬学総合研究院(医学), 講師 (80791293)
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Project Period (FY) |
2019-04-01 – 2024-03-31
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Keywords | 前立腺癌 / 腫瘍免疫 / 去勢抵抗生 |
Outline of Final Research Achievements |
The aim is to discover a new tumor immune evasion mechanism in castration-resistant prostate cancer (CRPC). Through microarray analysis, we extracted five genes, CD81, Ccl2, Cx3cl1, Nradd, and Tmem252, highly expressed in rat CRPC PLS10 cells, that can be engrafted in normal immunocompetent rats. Among these, CD81, Ccl2, and Cx3cl1 were transfected into rat CRPC PLS30 cells, which cannot survive in normal immunocompetent rats and orthotopically transplanted, but no tumor formation was observed in any of them. Next, we performed spatial transcriptome gene expression analysis in vivo and confirmed that Pmepa1 was highly expressed in PLS10. We have established the Pmepa1-introduced PLS30 strain and are conducting orthotopic transplant experiments in rats.
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Free Research Field |
病理学
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Academic Significance and Societal Importance of the Research Achievements |
去勢抵抗性前立腺癌(CRPC)に対する有効な治療法は未だ確立されてはいない。我々はラットCRPC細胞株を樹立し、正常免疫能ラットに同所移植するとPLS10は生着する一方で、PLS30では腫瘍形成はみられないことから、PLS10における腫瘍免疫回避機構を明らかにできれば、CRPCの治療法開発に繋がる基礎的データになると考えた。種々の解析により、PLS10で高発現している6遺伝子を抽出し、このうち3遺伝子についてPLS30に遺伝子導入して同所移植を行ったが、いずれも形質転換はなく腫瘍形成は得られなかった。他の遺伝子については遺伝子導入PLS30株を作成し、ラット同所移植実験を進めている。
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