自主反应性B细胞对与RNA相关的抗原的反应是由于TLR7基因重复导致的
Prapaporn Pisitkun1, Jonathan A Deane, Michael J Difilippantonio
1Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Rockville, MD 20852, USA.
概括
带有Y结合的自身免疫加速器 (Yaa) 位点的B细胞由于增加了托尔类受体7 (TLR7) 表达,对核抗原有偏见. 这突显了Y染色体基因重复如何影响自身免疫性疾病. 关键词:自身免疫,B细胞,雅雅部位,TLR7,核抗原.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 这是一种自身免疫力.
背景情况:
- 系统性自身免疫的特征是对核自身抗原的抗体.
- 驱动这些自身抗体的产生和选择的机制在很大程度上是未知的.
- 与Y链接的自身免疫加速器 (Yaa) 位点与自身免疫疾病的发展有关.
研究的目的:
- 调查与Yaa位点相关的内在B细胞偏差.
- 阐明托尔类受体7 (TLR7) 在Yaa介导的自身免疫性中的作用.
- 了解遗传变异,特别是基因拷贝数,如何影响多基因自身免疫性疾病.
主要方法:
- 对携带Yaa位点的小鼠B细胞种群的分析.
- 在B细胞中对托尔类受体7 (TLR7) 表达的评估.
- 调查雅雅部位的遗传基础,包括伪自体区域扩张.
主要成果:
- 庇护雅雅位点的B细胞表现出对核细胞抗原的内在偏见.
- 这种偏差归因于TLR7的显著增加表达,TLR7是一种先天性免疫受体.
- 雅雅位点与TLR7基因的重复有关,这是由于Y染色体上的伪自体区域的大量扩张.
结论:
- 在携带Yaa的B细胞中增加TLR7的表达驱动了针对核抗原的特定自身免疫反应.
- 基因拷贝数的变化,以TLR7重复为例,可以定性地改变多基因自身免疫性疾病的表现.
- 在小鼠Y染色体结构中存在显著的分歧,影响免疫系统功能和疾病易感性.
相关概念视频
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
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Bacterial RNA Polymerase
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
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