与遗传性心脏氨基粉症相关的Transthyretin突变G47V的表征
Xiaopeng He1, Mengdie Wang2,3, Jialu Sun2
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China, hexp@zju.edu.cn.
Cardiology
|March 4, 2024
概括
这项研究确定了一种新的TTR突变,G47V,导致早期发病的TTR氨基粉症与心脏氨基粉症 (ATTR-CA). G47V突变破坏了TTR蛋白的稳定性,而药物AG10在抑制其纤维化方面显示出希望.
科学领域:
- 遗传学 是一个遗传学.
- 生物化学 生化学
- 心脏病学 心脏病学
背景情况:
- 晶氨酸 (TTR) 突变会导致遗传性粉症,这是一种罕见的自体主导性疾病.
- 目前已有150多种TTR突变,其中一些需要进一步研究.
研究的目的:
- 调查一种与早期发病的TTR氨基粉症与心脏氨基粉症 (ATTR-CA) 相关的新型TTR突变 (G47V).
- 描述G47V-TTR突变的生物化学和生物物理特性.
- 评估小分子稳定剂在抑制G47V-TTR纤维化的有效性.
主要方法:
- 全外基因组测序 (WES) 在患有ATTR-CA.的患者中确定了G47V突变.
- 生物化学和生物物理分析 (尿素介导的托芬光) 评估了TTR蛋白的稳定性.
- 纤维细胞形成试验测试了药物反应.
- 超高性能液态染色学 (UPLC) 测量了血清TTR四聚合物度.
主要成果:
- 在TTR基因中,WES揭示了G47V突变 (c.200G>T).
- 与野生型 (WT) -TTR相比,G47V-TTR的热力学稳定性显著降低.
- 药物AG10有效抑制了G47V-TTR同胞蛋白的纤维化.
- 患者血清中大约40%的TTR是非四度基的.
结论:
- G47V-TTR突变与早期发病,临床典型的ATTR-CA.有关.
- 这项研究提供了G47V-TTR突变的第一个生化特征.
- 这些发现为G47V突变的致病性提供了洞察力.
更多相关视频
相关概念视频
03:03Amyloid Fibrils
9.5K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.5K
01:31Translation
142.0K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
142.0K
01:39Mutations
82.2K
Overview
82.2K