相关实验视频

Updated: Jan 8, 2026

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model

Published on: August 8, 2022

一个亚洲人的Sorsby Fundus Dystrophy:致病性Timp3 P.Y191c变体损害了它与Mmp2/9和细胞局部的结合

Miao Li¹, Haiying Peng¹, Shenao Ding¹

¹Henan Eye Institute, Henan Eye Hospital, People's Hospital of Zhengzhou University, Henan, People's Hospital, Zhengzhou, People's Republic of China.

Clinical ophthalmology (Auckland, N.Z.)

|December 15, 2025

概括

一种新的TIMP3基因变异 (p.Y191C) 在一个亚洲家族中引起索斯比底部缩症 (SFD). 这种变体破坏了蛋白质功能,通过改变MMP结合和增加细胞死亡导致视力丧失.

科学领域:

眼科医生眼科眼科
遗传学是一个遗传学.
分子生物学分子生物学

背景情况:

索斯比底部变 (SFD) 是一种严重的遗传性视网膜疾病.
金属蛋白酶3 (TIMP3) 基因的组织抑制剂在视网膜健康中起着至关重要的作用.
TIMP3中的突变与各种视网膜疾病有关.

研究的目的:

在一个多代亚洲血统中确定SFD的遗传原因.
描述与新型TIMP3变异相关的临床特征.
阐明TIMP3 p.Y191C变异的致病性背后的分子机制.

主要方法:

对受影响的家庭成员进行全面的眼科检查.
整体外体和桑格测序用于遗传分析.
使用野生型和突变型TIMP3的ARPE-19细胞模型进行体外研究,包括共免疫沉,MMP抑制试验和免疫光.

主要成果:

在七名受影响的个体中发现了一种异构的TIMP3 p.Y191C变体,与SFD共分离.
替代p.Y191C会影响保留的氨酸残留物,预计会降低TIMP3的稳定性.
该变体损害了TIMP3结合和抑制MMP2和MMP9的能力,改变了MMP2的局部化,并在炎症应激下诱导视网膜细胞的亡.

结论:

新型TIMP3 p.Y191C变种是致病性,在这个亚洲血统中引起SFD.
疾病机制涉及受损的金属蛋白酶抑制和改变的MMP2局部化.
这项研究提供了由这一特定的TIMP3突变引起的SFD的机制性理解.

关键词:

这就是MMP2的MMP2.在MMP9中,MMP9是MMP9.时间表3 TIMP3 病原性变异是一种病原性变异.索尔斯比基底缩症索尔斯比基底缩症索尔斯比基底缩症

更多相关视频

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Published on: August 15, 2019

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

Published on: August 20, 2019

相关概念视频

Abnormal Proliferation

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...

Single Nucleotide Polymorphisms-SNPs

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...

Pleiotropy

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...