Abstract
Objectives Deletion polymorphisms of Glutathione-S-transferase (GST) M1 and T1 are considered risk factors for various diseases. However, most previous studies only distinguished “null” and “non-null” genotypes. Our aim was to develop a reliable, high-throughput GSTM1/T1 genotyping method able to determine allele copy numbers. Design and methods We developed a multiplex real time PCR method to distinguish between heterozygous (1/0) and homozygous (1/1) GSTM1 and GSTT1 genotypes. The principle of relative quantification was applied and an expectation–maximisation (EM) algorithm was developed to assign one of 3 possible genotypes: 1/1, 1/0 or 0/0 for each of the two genes. Results 1320 Caucasians were genotyped using the newly developed method. The observed genotype distributions did not deviate from the expected and were in Hardy–Weinberg equilibrium. GSTM1 duplication was detected in one sample. Conclusion This new semiquantitative genotyping method is a sensitive and promising tool for large-scale molecular epidemiological and clinical studies.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
