性ホルモンのアンドロゲンは,腸内微生物群-TMAO経路を通じて血圧を上昇させる
Ying Li1, Hong-Li Jiang2, Lei Chen2
1Department of Critical Care Nephrology and Blood Purification, the First Affiliated Hospital and Department of Physiology and Pathophysiology, School of Basic Medical Sciences; Xi'an Jiaotong University, China (Y.L., H.-B.L.).
Hypertension (Dallas, Tex. : 1979)
|August 20, 2025
まとめ
男性性ホルモンである二酸化テストステロン (DHT) は腸内微生物群を変化させ,トリメチラミンN酸化物 (TMAO) を増加させることで高血圧を誘発する. この腸内微生物群-TMAO経路をターゲットにすることで 男性の高血圧の治療の可能性が生まれます
科学分野:
- 心血管科学
- 微生物群の研究
- 内分泌学
背景:
- 高血圧は全世界で 13億人に影響し 腸内微生物の不均衡が 高血圧に寄与します
- 男性の腸内微生物は 塩のような刺激に敏感で 女性に比べて高血圧になります
- 以前の研究では 腸内微生物群が環境要因に反応する 性別の違いが示されていました
研究 の 目的:
- 性別による腸内微生物群の血圧調節メカニズムを調査する.
- 高血圧に対する腸内微生物群の作用を媒介する性ホルモンの役割を明らかにする.
- 性別特有の高血圧におけるトリメチラミンN酸化物 (TMAO) 経路を調査する.
主な方法:
- 実験には抗生物質治療,性腺切除,性ホルモンの補充が 突発性高血圧のマウスとメスの間で行われました
- トリメチラミンN酸化物 (TMAO) またはその阻害剤を投与した.
- 分析には腸内微生物の組成,血圧測定,代謝物質レベル評価が含まれていた.
主要な成果:
- 腸内微生物の組成と抗生物質に対する血圧の性差が観察された.
- デヒドロテストステロン (DHT) は性腺切除されたネズミの血圧を上昇させ,腸内微生物群を変化させた.
- DHTはトリメチラミンとTMAOを増加させ,TMAOの蓄積は炎症と交感性活性化に関連している.
結論:
- ディヒドロテストステロン (DHT) は,腸内微生物群が媒介する,性別特有の血圧調節にメカニズム的な役割を果たします.
- 腸内微生物群とTMAOの経路は 男性の高血圧に不可欠です
- この経路をターゲットにすることで,男性における高血圧の潜在的治療戦略を提示します.
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