太平洋Crassostrea gigas中的腺激素受体的进化多样化和表达特征
Minhui Xu1,2, Xiaolong Gao3,4,5, Miren Dong1,2
1National Engineering Research Center of Marine Biotechnology and Engineering, Ningbo University, 315211, Ningbo, China.
BMC genomics
|October 23, 2025
概括
太平洋拥有六个上腺体受体 (AR),对免疫反应至关重要. 特定的AR亚型Cgα2Da和Cgα2Db显示出独特的进化路径和免疫细胞中的表达,增强了对病原体的适应能力.
科学领域:
- 海洋生物学和免疫学
- 无脊椎动物的G蛋白合受体 (GPCRs) 是一种受体.
- 进化基因组学是进化的基因组学.
背景情况:
- 上腺素受体 (ARs) 是G蛋白结合受体 (GPCRs),它们与甲基荷胺结合,并在软体动物中介导免疫反应.
- 了解像这样的无脊椎动物中的AR是它们免疫系统功能的关键.
研究的目的:
- 为了识别和表征太平洋中的上腺素受体 (ARs),Crassostrea gigas.
- 研究这些ARs的进化动态和与免疫相关的表达模式.
主要方法:
- 在Crassostrea gigas.中对AR进行生物信息识别和结构分析.
- 遗传学分析以确定AR亚家族和进化关系.
- 转录形状分析以评估不同组织中的AR表达和免疫挑战.
主要成果:
- 在中发现了六种AR,分为α (Cgα1A,Cgα2A,Cgα2C,Cgα2Da,Cgα2Db) 和β (Cgβ2) 类型,所有这些都具有保留的GPCR特征.
- Cgα2Da和Cgα2Db亚型经历了进化分歧,缺乏脊椎动物的正统类型,并经历了放松的净化选择.
- 特定的ARs (Cgα2A,Cgα2C,Cgα2Da) 主要表达在血细胞中,Cgα2C和Cgα2Da富含在粒细胞中,Cgα2A在粒细胞中.
- 在刺激Vibrio splendidus后,血细胞AR表达 (Cgα2A,Cgα2C,Cgβ2) 显著增加,Cgα2A显示了二次上调.
结论:
- 中Cgα2Da/α2Db-AR亚型的独特进化轨迹表明,在放松的选择下,免疫防御的适应策略.
- 这些AR的谱系特异性多样化驱动免疫细胞的差异表达,并增强对病原体的抵抗力.
- 这些发现提供了关于ARs在中的免疫调节作用及其在无脊椎动物中的更广泛的进化意义的见解.
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