Primer for detecting dynamic mutation of CAG repetitive sequence of ATXN3 gene and PCR amplification method thereof

Abstract

The invention relates to an improved primer for detecting the dynamic mutation of a CAG repetitive sequence of a spinocerebellar ataxia ATXN3 gene and a method thereof, characterized in that a specially designed specific primer is adopted to amplify the amount of a DNA fragment containing the CAG repetitive sequence in the ATXN3 gene to the observable degree through a special PCR procedure, and gel electrophoresis is utilized to observe the size of a PCR amplification product fragment and estimate the number of replication of the CAG dynamic mutation in the ATXN3 gene. The invention has the advantages that: 1. simplicity and economy, and no sequence detection, i.e. the method can be operated in common molecular biology laboratories or control laboratories, thereby establishing a simple detection method of the amplification CAG repetitive sequence; 2. high sensitivity and reliability: 25ng genome DNA is enough to detect the number of replication of the CAG dynamic mutation in the ATXN3gene, thereby a reliable basis is provided for clinically diagnosing spinocerebellar ataxia.

Description

technical field [0001] The invention belongs to the clinical detection technology in the field of biomedicine, and specifically relates to a new primer and PCR amplification method for detecting the dynamic mutation of the ATXN3 gene CAG repeat sequence of spinocerebellar ataxia, and the detection result can be used for clinical auxiliary diagnosis of spinocerebellar ataxia. financial disorder. Background technique [0002] Spinocerebellar Ataxia (SCA) is a group of chronic degenerative diseases of the central nervous system characterized by progressive balance and coordination disorders, previously known as Autosomal Dominant Cerebellar Ataxias, ADCAs). The main lesion sites of spinocerebellar ataxia are the spinal cord, cerebellum, and brainstem, and other tissues such as spinal nerves, cranial nerves, sympathetic nerves, basal ganglia, thalamus, hypothalamus, and cerebral cortex can be involved, and can also be accompanied by other systemic abnormalities. Such as skelet...

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Problems solved by technology

[0006] The invention provides a primer for detecting the dynamic mutation of the ATXN3 gene CAG repeat sequence and a PCR amplification method thereof, and aims to solve the problem of low specificity of the existing PCR amplification of the ATXN3 gene CAG repeat sequence

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