血液中のタンパク質から前立腺がん発症リスクを10年以上前に予測する手掛かり(Blood proteins could reveal clues to prostate cancer risk more than a decade before diagnosis)

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2026-10-22 オックスフォード大学

英国オックスフォード大学の研究チームは、血液中のタンパク質を分析することで、前立腺がんの発症リスクや悪性度に関わる生物学的な手がかりを、診断の10年以上前から捉えられる可能性を示した。研究では、後に前立腺がんを発症した982人と、比較対象となる1,573人の血液試料を調べ、6,000種類以上のタンパク質を測定し、約16年間追跡した。その結果、採血から15年以上後に診断された前立腺がんと関連する12種類のタンパク質を特定した。また、転移や死亡につながるような進行性の前立腺がんと関連する7種類のタンパク質も見いだし、その一つであるANKRD1は複数の重篤な病型と関連していた。免疫応答、細胞接着、血管形成に関わるタンパク質のほか、がん関連遺伝子ERBB3、KRAS、NRASに関係するタンパク質も注目された。本成果は、将来的に前立腺がんのリスク評価や進行性がんの予測方法を改善する手がかりとなる。ただし、現段階では臨床検査として利用できる段階にはなく、予測性能の検証が必要である。

血液中のタンパク質から前立腺がん発症リスクを10年以上前に予測する手掛かり(Blood proteins could reveal clues to prostate cancer risk more than a decade before diagnosis)

<関連情報>

循環免疫および癌ドライバー遺伝子バイオマーカーは前立腺癌の診断より10年以上前に検出される Circulating Immune and Cancer Driver Gene Biomarkers Precede Prostate Cancer Diagnosis by over 10 yr

Zhe Huang, Mahboubeh Parsaeian, Vivian Viallon, Ziqiao Wang, Keren Papier, Trishna Desai, Wing Ching Chan, Jennifer A. Collister, Marie Breeur, Tammy Y.N. Tong, Natalia Cabrera-Castro, Marcela Guevara, Ana Jimenez-Zabala, Mattias Johansson, P. Martijn Kolijn, Christina M. Lill, Ian G. Mills, Carlotta Sacerdote, Rosario Tumino, Raul Zamora-Ros,…,Ruth C. Travis
European Urology  Available online: 21 October 2026
DOI:https://doi.org/10.1016/j.eururo.2026.08.014

Abstract

Background and objective
Prospective proteomic and proteogenomic studies may enhance the understanding of proteins associated with prostate cancer (PCa) development.

Methods
In a case-cohort study within the European Prospective Investigation into Cancer and Nutrition (EPIC), baseline plasma samples from 982 incident PCa cases and 1573 subcohort participants were profiled using the SomaScan 7k platform (over 6000 proteins). Associations were estimated using Prentice-weighted Cox models. The coprimary end points were incident overall PCa and aggressive PCa (n = 290). Findings were evaluated in the Atherosclerosis Risk in Communities (ARIC) study and supported by Mendelian randomization (MR) and exome gene-burden analyses.

Key findings and limitations
ACP3, FLT4, and KLK3 were associated with overall PCa risk (hazard ratio [HR] per 1 standard deviation [SD] increase were 1.20 [1.10–1.31], 1.26 [1.13–1.40], and 2.28 [1.96–2.65], respectively). Seven proteins were associated with aggressive PCa risk, with ANKRD1 consistently associated across multiple clinically relevant disease subtypes. Twelve proteins were associated with PCa diagnosed >15 yr after blood draw, including ANXA2, GZMK, and OSCAR. ACP3, ANXA2, APOC2, and KLK3 showed consistent associations in both EPIC and ARIC. Additionally, four proteins had support from MR analyses and eight from rare-variant burden tests. Circulating products of established PCa driver genes, including ERBB3, KRAS, and NRAS, were associated with future aggressive disease. Limitations include incomplete external replication and differences in end point availability across cohorts.

Conclusions and clinical implications
Prospective plasma proteomic analyses identified circulating proteins associated with future PCa risk, including proteins related to immune, adhesion, angiogenesis, and PCa driver-gene pathways. These findings identify candidate protein risk factors for overall and clinically significant PCa, and warrant further validation and mechanistic evaluation.

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