来自Megalobrama amblycephala编码血红蛋白具有细胞外微生物杀伤性活动的基因的特征和表达分析
Qijun Wang1, Xiaoheng Zhao2,3, Yunlong Liu2,3
1Shaanxi Key Laboratory of Qinling Ecological Security, Shaanxi Institute of Zoology, Xi'an 710032, China.
Genes
|October 28, 2023
概括
研究人员在Megalobrama amblycephala中确定了两个血红蛋白子单元,即Mahbα和Mahbβ. 这些子单元表现出明显的表达模式,并且对水生病原体具有显著的抗菌活性.
科学领域:
- * 分子生物学 * 分子生物学
- * 免疫学 免疫学
- * 水产养殖是水产养殖的一种.
背景情况:
- * 血红蛋白 (Hb) 对于运输氧气至关重要,但其在鱼类中的免疫功能尚未得到充分研究.
- *中国重要的淡水鱼 - - 巨鱼 (Megalobrama amblycephala) 作为本次调查的模型.
- *了解鱼类血红蛋白的多样性和功能对于水产养殖和进化生物学至关重要.
研究的目的:
- * 为了识别和表征血红蛋白α (MaHbα) 和β (MaHbβ) 亚单元,在巨大脑.
- *分析MaHbα和MaHbβ在不同组织和发育阶段的表达模式.
- * 评估MaHbα和MaHbβ对常见水生病原体的抗菌活性.
主要方法:
- *cDNA测序以确定MaHbα和MaHbβ的全长序列.
- *使用组织和发育样本进行定量表达分析.
- * 遗传学分析以确定进化关系.
- *在体外测试以评估合成Mahbα和Mahbβ的抗菌活性.
主要成果:
- *确定了Mahbα (588bp,143aa) 和Mahbβ (603bp,148aa) 与其他鱼类血红蛋白具有很高的同质性.
- *MaHbα主要在血液和大脑中表达;MaHbβ在肌肉中表达最高.
- *表达模式在发育过程中有所变化,并且在Aeromonas hydrophila感染后下调.
- *合成的MaHbα和MaHbβ对五种水生病原体表现出强大的抗菌活性.
结论:
- *两种新型的血红蛋白子单元MaHbα和MaHbβ在Megalobrama amblycephala中被发现.
- * 这些子单元表现出组织特异性和发育表达,在细菌感染期间调节变化.
- *MaHbα和MaHbβ具有显著的抗微生物特性,这表明它们在氧气运输和天生的免疫力方面具有双重作用.
- *这些发现有助于理解鱼类血红蛋白的进化和免疫防御机制.
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