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初期の動脈硬化症および腎血管疾患における明確な腎損傷
Alejandro R Chade1, Martin Rodriguez-Porcel, Joseph P Grande
1Department of Internal Medicine, Division of Hypertension, Mayo Clinic, Rochester, Minn 55905, USA.
Circulation
|August 28, 2002
まとめ
同時に高コレステロール血症と腎動脈狭窄症 (RAS) が併発すると,腎臓の機能と構造が著しく損なわれます. この組み合わせは酸化ストレスと炎症を悪化させ,腎臓疾患の進行を加速させる可能性があります.
科学分野:
- ネフロロジーはネフロロジーを用います.
- 心血管研究 循環器科の研究
- 病理生理学 病理生理学とは
背景:
- 動脈硬化性腎血管疾患 (RAS) は腎臓機能を悪化させる可能性があるが,そのメカニズムは不明である.
- この研究では,動脈硬化症とRASが腎臓の健康に及ぼす影響の組み合わせを調査した.
研究 の 目的:
- 初期の動脈硬化症とRASの組み合わせが,RAS単独よりも腎臓の機能と構造により大きな有害な影響を及ぼすかどうかをテストする.
- 併発性高コレステロール血症とRASにおける腎臓損傷の根本的なメカニズムを解明する.
主な方法:
- 豚は通常の食事または高コレステロール (HC) の食事を与えられ,RASまたは組み合わせ (HC + RAS) を受けて12週間を過ごしました.
- In vivo 腎臓の血液動力学と機能は,コンピュータトモグラフィを用いて評価されました.
- 腎臓組織のex vivo分析により,線維硬化症,炎症,および分子マーカーが検査されました.
主要な成果:
- 同時にHCとRAS (HC+RAS) を投与すると,管状再吸収が著しく低下し,血管活性剤に対するGFR反応が鈍化します.
- HC+RAS腎臓では,線維硬化症,炎症,酸化ストレス,NF-κBとiNOSの発現が増加した.
- 基礎 perfusion と GFR は,RAS と HC+RAS グループで同様に減少しました.
結論:
- 早期の慢性HC+RASは,腎臓の管状および状区間に明確な有害な影響を及ぼします.
- 酸化ストレスと炎症の増加は,機能的および構造的損傷に関与しています.
- これらの発見は,臨床的に観察された末期性腎疾患への急速な進行を説明する可能性がある.
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