円形RNAは,老化する胎盤組織と死産で蓄積され,DNAの損傷と細胞の老化につながる

Anya L Arthurs¹, Matilda R Jackson², Dylan McCULLOUGH³

¹Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia 5042; College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia 5042; School of Biomedicine and Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia 5000.

American journal of obstetrics and gynecology

|August 31, 2025

まとめ

胎盤は DNA に結合する円形RNA (circRNAs) が増加し,損傷と衰老を引き起こします. 母親の血液中のこのcircRNAは死産のリスクを予測する可能性があります.

科学分野:

生殖生物学
ゲノミクス
分子生物学

背景:

原因不明の死産は胎盤の早期老化と機能低下と関連しています
円形RNA (circRNAs) は老化組織に蓄積され,DNA損傷とゲノム不安定を引き起こす可能性があります.
circRNAはゲノムDNA (gDNA) に直接結合する.

研究の目的:

健康な胎児と死産児の胎盤組織の老化とcircRNAの蓄積を調査する.
円周RNAが胎盤DNAと相互作用して損傷や衰老を引き起こすかどうかを判断する.
死産リスクの潜在的バイオマーカーとしてcircRNAsを評価する.

主な方法:

胎盤サンプル (n=64) で定量化された7つの候補のcircRNAと線形トランスクリプト
DNAの損傷テロメアの長さ衰老のマーカーを調べた
妊娠初期からの母親の血液 (n=18) のcircRNAレベルを分析した.

主要な成果:

胎盤のDNA損傷,老化,およびcircRNA発現は妊娠年齢および死産の症例で増加した.
circRNAsは胎盤DNAに結合し,その蓄積は減少したRNase H1と相関する.
妊娠16週間の母親の血中circRNA濃度の上昇は死産を予測した.
胎盤細胞のDNA損傷と老化を減少させた.

結論:

胎盤は DNA 損傷,老化,および circRNA 蓄積によって特徴づけられる加速した老化を示します.
円周RNAは胎盤の老化とDNA損傷に寄与し,潜在的に減少したRNase H1を介して発生する.
母親のcircRNAレベルは,死産リスクの早期スクリーニング方法として機能する.

キーワード:

DNAについて老化する円形のRNA ダブルストランドブレイク胎盤妊娠衰えること死産テロメア

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