JoVE Logo
Faculty Resource Center

Sign In

A subscription to JoVE is required to view this content. Sign in or start your free trial.

Abstract

Genetics

一种基于强健聚合酶链反应的测定法,用于定量易碎 X 智力迟钝-1 基因中的细胞氨酸-鸟-鸟-鸟- 三核苷酸重复

Published: September 16th, 2019

DOI:

10.3791/59963

1Central Laboratory, Bao'an Maternity and Child Health Hospital, Jinan University, 2Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, 3Shenzhen Research Institute, The Chinese University of Hong Kong, 4Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, 5PerkinElmer Diagnostics, 6Department of Obstetrics and Gynecology, Bao'an Maternity and Child Health Hospital, Jinan University, 7Maternal-Fetal Medicine Institute, Bao'an Maternity and Child Health Hospital, Jinan University
* These authors contributed equally

Abstract

易碎 X 综合征 (FXS) 和相关疾病是由易碎 X 智力迟钝-1(FMR1)基因启动子的 5' 未翻译区域 (UTR) 中细胞氨酸-瓜氨酸 -鸟-鸟苷 (CGG) 三核苷酸重复的扩展引起的。按照惯例,基因分析仪上的毛细血管电泳片段分析用于FMR1的CGG重复大小,但当重复数高于200时,需要额外的南方印斑分析才能进行精确测量。在这里,我们提出了一种准确和强大的聚合酶链反应(PCR)为基础的方法,用于定量FMR1的CGG重复。本测试的第一步是使用易碎 X PCR 试剂盒对FMR1启动子的 5'UTR 中的重复序列进行 PCR 扩增,然后对 PCR 产品进行纯化和微流体毛细管电泳仪器上的片段大小,以及随后通过使用分析软件引用已知重复项的标准来解释 CGG 重复次数。这种基于PCR的测定是可重复的,能够识别FMR1启动子的全部CGG重复,包括重复数超过200(分类为完全突变)、55至200(预突变)、46至54(中间)和10至45(正常)。它是一种经济高效的方法,有助于对 FXS 和易碎 X 相关疾病进行分类,具有鲁棒性和快速报告时间。

Explore More Videos

151 X 1 X

This article has been published

Video Coming Soon

JoVE Logo

Privacy

Terms of Use

Policies

Research

Education

ABOUT JoVE

Copyright © 2024 MyJoVE Corporation. All rights reserved