牛杀手免疫球蛋白类受体表达在白细胞子集上表明与人类相比,功能分歧
Abigail L Hay1, James Birch1, Shirley Ellis1
1The Pirbright Institute, Woking, Surrey GU24 0NF, United Kingdom.
Veterinary immunology and immunopathology
|August 27, 2023
概括
杀牛免疫球蛋白类受体 (KIR) 与灵长类动物不同. 牛的KIR在B细胞和单细胞上发现,而不仅仅是T细胞,这表明不同的功能和连接体.
科学领域:
- 免疫学 免疫学 免疫学
- 进行比较的基因组学.
背景情况:
- 杀手免疫球蛋白类受体 (KIR) 对于灵长类动物的免疫调节至关重要,主要是在NK和T细胞上.
- 牛 (牛,绵羊,山羊) 拥有扩大的KIR家族,但它们的表达和功能在很大程度上仍然没有特征.
- 牛具有功能DL系KIR, botaKIR2DL1,类似于灵长类的KIR.
研究的目的:
- 为了研究牛 botaKIR2DL1.1.的白细胞表达模式.
- 要确定牛的KIR表达是否类似于灵长类动物的KIR.
- 探索与灵长类动物KIR相比,功能和配体的潜在差异.
主要方法:
- 开发一种特定的小鼠抗botaKIR2DL1单克隆抗体.
- 流细胞计,ELISA和西部斑分析以评估抗体效用和受体表达.
- 用IL-2进行外周血液单核细胞 (PBMC) 的体外刺激.
主要成果:
- 与灵长类动物的KIR不同, botaKIR2DL1除了在T细胞之外,还在牛的B细胞和单细胞上表达.
- 在NK细胞上也检测到botaKIR2DL1的低水平表达.
- 在实验室用IL-2刺激导致PBMCs上 botaKIR2DL1的表达减少.
结论:
- 与灵长类动物KIR相比,牛 botaKIR2DL1 呈现出明显的表达特征.
- 独特的表达模式表明牛的功能和潜在不同的MHC-I配体不同.
- 需要进一步的研究来阐明牛肉KIR的特定作用和连接体相互作用.
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