在使用SHIVs感染CCR5或CXCR4的 rhesus中明显的病原性序列
J M Harouse1, A Gettie, R C Tan
1Aaron Diamond AIDS Research Center, The Rockefeller University, 455 First Avenue, 7th Floor, New York, NY 10016, USA.
概括
猿人免疫缺陷病毒 (SHIV) 模型揭示了信封蛋白如何影响HIV-1病原性. 同受体使用 (CCR5与CXCR4) 在中决定了不同的CD4+T细胞损失模式,影响了疫苗开发.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 病变发生研究研究 病变发生研究
背景情况:
- 猿人免疫缺陷病毒 (SHIV) 感染的作为研究人类免疫缺陷病毒1型 (HIV-1) 病变的重要体内模型.
- 了解HIV-1包膜蛋白和病毒共受体使用的作用对于开发有效的疫苗和治疗方法至关重要.
研究的目的:
- 在中比较感染CCR5 (R5) 特定的SHIVSF162P和CXCR4 (X4) 特定的SHIVSF33A.2的病原性结果.
- 阐明病毒共受体热流对CD4+T细胞枯竭在肠道和外周两部分的影响.
主要方法:
- 麻雀感染了两个不同的SHIV菌株:SHIVSF162P (R5-热带) 和SHIVSF33A.2 (X4-热带).
- 监测病毒复制水平,评估肠道和外围组织中的CD4+T细胞种群.
- 基于共受体利用的病原性结果的比较分析.
主要成果:
- 无论是R5和X4的SHIV感染都显示了可比的病毒复制水平.
- SHIVSF162P (R5) 感染导致显著的肠道CD4+T细胞损失,随后是周围细胞枯竭.
- SHIVSF33A.2 (X4) 感染引起了深度的外围CD4+T细胞损失,但没有类似的肠道影响.
结论:
- 同受体利用 (CCR5与CXCR4) 极大地影响HIV-1病原和CD4+T细胞热流.
- 这种SHIV模型有效地总结了与HIV-1包膜蛋白功能相关的不同致病特征.
- 这些发现支持该模型对针对包膜蛋白的HIV-1疫苗和治疗方法的临床前评估的实用性.
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