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Identification Of Genetic Variants In The Low Density Lipoprotein Receptor Gene Causing Familial Hypercholesterolemia And Its Sequence Homology With Mus Musculus

By: Ameer Hassan (2014-VA-504) | Dr. Wasim Shehzad.
Contributor(s): Dr. Muhammad Yasir Zahoor | Dr. Muhammad Tayyab.
Material type: materialTypeLabelBookPublisher: 2016Description: 74p.Subject(s): Molecular Biology and BiotechnologyDDC classification: 2538-T Dissertation note: Familial hypercholesterolemia (FH) is caused by mutations in the genes coding for the low-density lipoprotein receptor (LDLR), apolipoprotein B-100, or proprotein convertase subtilisin/kexin type 9 (PCSK9). In this study, a molecular analysis of LDLR gene was performed in 20 unrelated patients from Pakistan. All patients were clinically diagnosed with definite or possible hypercholesterolemia according to a uniform protocol and internationally accepted WHO criteria. Preferable study was made to highlight the Genetic variation in Exon 4 of LDLR gene associated with defective catabolism of cholesterol effecting lipid metabolism which results in Familial Hypercholesterolemia. The extraction of genomic DNA was done from all selected blood samples. By selecting primers they were synthesized and optimized on extracted DNA samples. PCR product was sequenced and aligned. Mutations in the LDLR gene and its sequenced homology with Mus musculus were analyzed. We didn’t found any polymorphisms in the LDLR gene exon 4. So we concluded that there is no association between SNPs and increased levels of cholesterol in Pakistani population. More research should be carried out in Pakistan by increasing the sample size and considering the other regions of LDLR gene. This study will help the early detection and treatment of such cases and may ultimately reduce the incidence of mortality due to myocardial infarction. Apart from diagnosis, we also suggest it will be a potential therapeutic strategy to manage FH.
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Familial hypercholesterolemia (FH) is caused by mutations in the genes coding for the low-density lipoprotein receptor (LDLR), apolipoprotein B-100, or proprotein convertase subtilisin/kexin type 9 (PCSK9). In this study, a molecular analysis of LDLR gene was performed in 20 unrelated patients from Pakistan. All patients were clinically diagnosed with definite or possible hypercholesterolemia according to a uniform protocol and internationally accepted WHO criteria. Preferable study was made to highlight the Genetic variation in Exon 4 of LDLR gene associated with defective catabolism of cholesterol effecting lipid metabolism which results in Familial Hypercholesterolemia. The extraction of genomic DNA was done from all selected blood samples. By selecting primers they were synthesized and optimized on extracted DNA samples. PCR product was sequenced and aligned. Mutations in the LDLR gene and its sequenced homology with Mus musculus were analyzed. We didn’t found any polymorphisms in the LDLR gene exon 4. So we concluded that there is no association between SNPs and increased levels of cholesterol in Pakistani population. More research should be carried out in Pakistan by increasing the sample size and considering the other regions of LDLR gene. This study will help the early detection and treatment of such cases and may ultimately reduce the incidence of mortality due to myocardial infarction. Apart from diagnosis, we also suggest it will be a potential therapeutic strategy to manage FH.

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