N-终端区域负责MDSC中的mHv1通道活动
Antonio Peña-Pichicoi1,2, Miguel Fernández1,2, Nieves Navarro-Quezada1,2
1Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile.
Frontiers in pharmacology
|November 2, 2023
概括
电压关闭的质子通道 (Hv1) 调节髓质衍生抑制细胞 (MDSCs) 中的免疫抑制. 这项研究证实了多个mHv1异型具有明显的关门特性,这表明MDSC中的替代拼接微调Hv1通道功能.
科学领域:
- 分子生物学分子生物学
- 道生理学 道生理学
- 免疫学 免疫学 免疫学
背景情况:
- 电压关闭的质子通道 (Hv1) 对于髓质衍生抑制细胞 (MDSC) 免疫抑制功能至关重要.
- Hv1通道被认为是癌症免疫治疗的潜在治疗点.
- 关于小鼠Hv1 (mHv1) 在MDSC中的功能多样性的信息有限.
研究的目的:
- 研究小鼠MDSC中的mHv1异型的功能多样性.
- 为了验证预测的转录变异及其蛋白质异型.
- 描述mHv1异型的独特生物物理性质.
主要方法:
- 通过RT-PCR来确认从MDSCRNA中获得的mRNA变异.
- 在Xenopus laevis卵子中克隆和表达mHv1开放式读取.
- 宏观补丁电压电生理学记录质子电流.
主要成果:
- 所有三个预测的mHv1异型 (mHv1.1,mHv1.2,mHv1.3) 都得到了确认并得到了功能表达.
- 异形体表现出明显的激活特性:mHv1.2显示较慢的动力学和右转的G-V曲线.
- N-终端长度与门的效率相反相关,其中mHv1.1是最有效的.
结论:
- 在MDSCs中,N端外子的替代拼接调节了mHv1的功能.
- MDSCs可以表达多个mHv1异型,具有不同的门特性.
- Hvcn1基因主要表达mHv1.1,确保MDSC功能的高效通道门.
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