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基因分析和TGFBR2变异的功能评估在微和口腔裂中

Jes-Rite Michaels¹, Paul P R Iyyanar¹, Ammar Husami²

¹Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, United States of America.

|June 9, 2025

概括

研究了一种罕见的转化生长因子β受体2 (TGFBR2) 变异体,以确定其在口腔裂中的作用. 在小鼠中进行的基因组编辑表明,这种TGFBR2变体不会导致面异常,这对in silico预测具有挑战性.

科学领域:

遗传学是一个遗传学.
发展生物学发展生物学
医学遗传学医学遗传学

背景情况:

嘴唇裂和口腔裂是由于胚胎融合失败导致的常见先天性异常.
这些疾病的遗传基础是复杂的,许多因果基因尚未确定.
转化生长因子β受体2 (TGFBR2) 与面发育有关.

研究的目的:

为了研究一种罕见的TGFBR2变体,在患有先天面异常的患者中发现.
为了确定已识别的TGFBR2变异是否是 palatal cleft 或 micrognathia 的因果因素.

主要方法:

整体外基因组测序确定了TGFBR2.2中的候选变体.
基因组编辑被用来在小鼠模型 (Tgfbr2V387M) 中创建正义变体.
对Tgfbr2V387M小鼠的表型分析包括对面异常和生存率的评估.

主要成果:

在Tgfbr2V387M小鼠模型中,没有出现面异常.
Tgfbr2V387M小鼠表现出正常的生存率.
该变种在基预测的致病性并未在小鼠模型中重复.

结论:

调查的TGFBR2变种 (V387M) 不太可能成为口腔裂或微内的因果因素.
这项研究强调了将人类遗传发现转化为动物模型的挑战.
这些发现有助于解释未来的TGFBR2变异在面异常患者中.

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