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  • Title: Resequencing the untranslated regions of the lipoprotein lipase (LPL) gene reveals that variants in microRNA target sequences are associated with triglyceride levels.
    Author: Evans D, Beil FU, Aberle J.
    Journal: J Clin Lipidol; 2013; 7(6):610-4. PubMed ID: 24314358.
    Abstract:
    BACKGROUND: Rare variants in the protein coding regions of the lipoprotein lipase (LPL) gene have been shown to be important in the development of hypertriglyceridemia. OBJECTIVES: The aim of this study was to determine whether rare variants in the 3' and 5' untranslated regions (UTRs) of the LPL gene are also associated with severe hypertriglyceridemia. METHODS: The DNA sequences of the 3' and 5' UTRs of the LPL gene of 63 patients with triglycerides > 875 mg/dL (10 mmol) and 69 probands with triglycerides below the 25th percentile for age and sex were determined. The sequence at the 5' end was extended to include 2 further elements (-702 to -666 and -468 to -430) shown to be associated with the control of LPL expression. RESULTS: No statistically significant difference was found in the occurrence of rare mutations in either the 3' or the 5' UTRs between the 2 groups. Sequence analysis allowed the genotyping of 47 single nucleotide polymorphisms (SNPs) in the 3' UTR and 11 in the 5' UTR. Two groups of SNPs in the 3' UTR, based on allelic association, were statistically significantly associated with plasma triglycerides. Each of these groups contained SNPs in the target sequences for microRNAs. These findings were replicated in independently formed groups. CONCLUSION: We provide genetic evidence that microRNAs may play a role in the expression of LPL and thus plasma triglyceride levels.
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