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TRPM4は,T細胞活性化後のカルシウム振動を調節する

Pierre Launay¹, Henrique Cheng, Subhashini Srivatsan

¹Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA.

Science (New York, N.Y.)

|November 20, 2004

まとめ

T細胞のTRPM4チャネルを阻害すると,カルシウムシグナル伝達が変化し,振動パターンが持続的な上昇に変化します. この調節により,インタールイキン-2の産生が促進され,TRPM4が強調されます.

科学分野:

免疫学免疫学とは
細胞生理学細胞生理学
イオンチャネル機能

背景:

TRPM4は,カルシウムで活性化された非選択的カチオンチャネルです.
カルシウムシグナル伝達と細胞反応におけるその役割は不明である.
TRPM4は膜脱極化を媒介する.

研究の目的:

T細胞のカルシウム (Ca2+) 信号伝達におけるTRPM4の機能的重要性を調査する.
TRPM4阻害が受容体媒介のCa2+動員とサイトカイン生成に及ぼす影響を決定する.

主な方法:

Tリンパ球における内生TRPM4の分子阻害.
TRPM4電流の計測. TRPM4電流の計測. TRPM4電流の計測. TRPM4電流の計測. TRPM4電流の計測. TRPM4電流の計測.
細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]) 振動の分析. 細胞内Ca2+濃度 ([Ca2+]i) 振動の分析.
インターリューキン-2の産生に関する評価.

主要な成果:

TRPM4の阻害により,T細胞におけるTRPM4の電流が抑制された.
受容体媒介によるCa2+の動員が深く影響を受けた.
アゴニスト媒介による[Ca2+]iの振動が持続的な上昇にシフトした.
インターリューキン-2の産生が強化された.

結論:

TRPM4媒介の去極化は,T細胞のCa2+振動を調節する.
TRPM4の活動によるCa2+の流入の変化は,下流のサイトカインの産生に影響します.
TRPM4はT細胞の活性化と免疫応答において重要な役割を果たします.

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