ディヒドロピリジン受容体cDNAの断片によってカルシウムチャネル発現の特定のブロック
1Division of Physiology and Pharmacology, Sackler School of Medicine, Tel Aviv University, Ramat Aviv, Israel.
まとめ
ウサギの骨格筋ジヒドロピリジン (DHP) 受容体は,機能的にDHPに敏感な電圧依存カルシウムチャンネル (VDCC) とつながっています. この研究は,DHP受容体遺伝子が,DHP感受性VDCC発現に不可欠であるという機能的証拠を提供します.
科学分野:
- 分子生物学は分子生物学である.
- 心血管の生理学 心血管の生理学
- 神経薬理学神経薬理学について
背景:
- ディヒドロピリジン (DHP) 受容体の構造は,電圧依存カルシウムチャネル (VDCC) のチャネルサブユニットを形成することを示唆しています.
- DHP受容体とVDCCの活性を直接結びつける機能的な証拠は不足しています.
研究 の 目的:
- ウサギの骨格筋のDHP受容体がVDCCsのチャンネル形成サブユニットであることを機能的に証明するために.
- DHPに敏感なVDCCとDHPに敏感でないVDCCの分子の違いを調査する.
主な方法:
- Xenopus卵細胞におけるDHP受容体RNAを標的とした反感覚DNAオリゴヌクレオチドを使用した.
- 特定のVDCCサブタイプおよび他のイオンチャネルの抑制を評価した.
主要な成果:
- オリゴヌクレオチドは,ウサギとネズミの心臓細胞におけるDHP感受性VDCC発現を特異的に抑制した.
- DHP無感のVDCC,ナトリウム,カリウムチャネルの発現は影響を受けませんでした.
- DHPに敏感なVDCCとDHPに敏感でないVDCCは,異なる分子実体であることを実証した.
結論:
- ウサギの骨格筋のDHP受容体遺伝子は,心臓のDHP感受性VDCCの成分をコードする遺伝子と密接に関連している,または同一である.
- これは,VDCCにおけるDHP受容体の役割に関する機能的証拠を提供し,VDCCサブタイプ間の分子差異を強調しています.
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