胸腺リン酸化酵素はSARS-CoV-2スパイクタンパク質誘発性肺腫瘍形成を促進する
bioRxiv : the preprint server for biology
|December 31, 2025
まとめ
COVID-19生存者は、SARS-CoV-2スパイクタンパク質(SP)と胸腺リン酸化酵素(TYMP)により、肺がんリスクが高い。TYMP欠損はSP誘発性肺損傷および腫瘍発生を軽減し、治療標的を提供する。
科学分野:
- 肺医学;腫瘍学;ウイルス学
背景:
- COVID-19生存者は、肺がんのリスク因子である間質性肺線維症の増加を示している。SARS-CoV-2スパイクタンパク質(SP)と胸腺リン酸化酵素(TYMP)が肺腫瘍形成を促進する役割を調査する必要がある。
研究 の 目的:
- SARS-CoV-2 SP誘発性肺損傷とTYMP上昇が肺腫瘍形成を促進するかどうかを調査する。COVID-19の長期的な肺への影響を軽減するための潜在的な治療標的としてTYMPを検討する。
主な方法:
- TriNetXを用いた後向きコホート解析およびK18-hACE2トランスジェニックマウス(TYMP欠損ありとなし)を用いたメカニズム研究。マウスには気管内SPまたはコントロールライセートを投与し、その後ウレタン誘発性肺がんプロトコルを実施した。肺損傷、炎症、線維症、STAT3活性化、サイトカインプロファイル、腫瘍量を評価した。インビトロでSPおよびRBD誘発性ACE2処理を評価した。
主要な成果:
- COVID-19生存者は、特に現喫煙者において、肺がんリスクの増加(ハザード比1.50)を示した。SPはマウスに肺損傷、炎症、微小血栓を引き起こしたが、TYMP欠損マウスではこれらが軽減された。SPは肺腫瘍の発生率と悪性度を著しく増加させた。TYMP欠損は腫瘍形成を50%から18%に減少させ、SP誘発性STAT3の上方制御と線維症を減弱させた。
結論:
- SARS-CoV-2 SPは、STAT3シグナル伝達と炎症性リモデリングを伴うTYMP依存的なメカニズムを介して、肺損傷、線維症、腫瘍形成を駆動する。COVID-19は、特に現喫煙者において、肺がんリスクを著しく増加させる。TYMPは、COVID-19の長期的な肺への影響を軽減するための潜在的な治療標的である。
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