HIV-1がCD4+細胞に侵入することは,キモカイン受容体CC-CKR-5によって媒介されます
T Dragic1, V Litwin, G P Allaway
1The Aaron Diamond AIDS Research Center, The Rockefeller University, New York 10016, USA.
Nature
|June 20, 1996
まとめ
MIP-1alpha,MIP-1beta,RANTESなどのベータケモカインは,HIV-1がCD4+T細胞に侵入するのを阻害する. 受容体CC-ケモカイン受容体5 (CC-CKR-5) は,NSI HIV-1感染の重要な要因として特定されています.
科学分野:
- 免疫学 免疫学とは
- ウイルス学 ウイルス学 ウイルス学
- 細胞生物学 細胞生物学
背景:
- ベータ・ケモカイン (MIP-1alpha,MIP-1beta,RANTES) は,ヒト免疫不全ウイルス1型 (HIV-1) の特定の株による感染を抑制することが知られている.
- HIV-1に曝露した未感染者のCD4+T細胞は,NSIHIV-1感染に対する耐性を発揮し,ベータ・ケモカインを増加させる.
研究 の 目的:
- ベータ・ケモキンがHIV-1感染を抑制するメカニズムを調査する.
- NSI HIV-1の侵入と融合に関与する細胞受容体を特定する.
主な方法:
- ベータ・ケモカインによるHIV-1抑制を測定するアッセイ.
- 細胞融合検査は,環境媒介による膜融合を評価するために行われます.
- CD4+細胞におけるβ-ケモカイン受容体の発現分析.
主要な成果:
- MIP-1alpha,MIP-1beta,およびRANTESは,NSIのHIV-1感染をエントリー段階で抑制する.
- これらのケモカインはまた,環境媒介による細胞-細胞膜融合を阻害する.
- CD4+細胞におけるCC-ケモカイン受容体5 (CC-CKR-5) の発現は,NSIのHIV-1感染および環境媒介による融合に対する感受性を授与する.
- CC-CKR-5はNSI原発HIV-1株の第2受容体として特定されています.
結論:
- ベータ・ケモカインは,NSIのHIV-1感染を制限する上で重要な役割を果たします.
- CC-CKR-5は,NSI HIV-1の侵入と融合を媒介する重要な細胞受容体であり,ウイルスの共受容体として作用する.
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