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Title: Screening for mutations in exons encoding the ligand-binding domain of the LDL receptor gene using PCR-CFLP and PCR-SSCP
Authors: Klai Upsorn Pongrapeeporn
Wattana Leowattana
Wilairat Nuchpramool
Kwandoa Kerdsaeng
Pikun Thepsuriyanon
Sudcharee Kiartivich
Preyanuj Yamwong
Sompong Ong-Ajyooth
Anchalee Amornrattana
Lumpoon Kasemsuk
Sivadee Laungsuwan
Kosit Sribhen
Mahidol University
Faculty of Medicine, Siriraj Hospital, Mahidol University
Amersham Pharmacia Biotech.
Keywords: Medicine
Issue Date: 1-Dec-2001
Citation: Journal of the Medical Association of Thailand. Vol.84, No.SUPPL. 3 (2001)
Abstract: Primary hypercholesterolemia includes both monogenic disorders and polygenic conditions. Two well defined monogenic disorders are familial hypercholesterolemia (FH) and familial defective apolipoprotein (apo) B-100 (FDB). Both disorders convey high risk of premature coronary artery disease. FH and FDB are caused by mutations in LDL receptor and apo B-100 genes, respectively. In the present study, mutations in both genes in Thai subjects with primary hyper-cholesterolemia were screened. For apo B-100 gene, a common mutation R3500Q was screened. This mutation was not observed in the patients (n = 45). For LDL receptor gene, mutations in the exons encoding the ligand - binding domain were screened. By PCR-CFLP analysis, 18 abnormal CFLP patterns in exon 4, the hot spot for mutations, were found in patients (n=45). One of the DNA samples with abnormal CFLP patterns was previously identified and reported as a possible disease-causing mutation, namely D151Y. For the other exons, the screening technique was PCR-SSCP. Abnormal SSCP patterns in DNA samples from patients (n=20) were found as follows, two in exon 3, one in exon 5 and another one in exon 6. Further characterization by DNA sequencing and family studies for these abnormal patterns are underway.
ISSN: 01252208
Appears in Collections:Scopus 2001-2005

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