| Polymorphic variants of the beta2-adrenergic receptor (ADRB2) gene and ADRB2-related propanolol-induced dyslipidemia in the Colombian population. | |
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MedLine Citation:
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PMID: 16082424 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Different polymorphisms of the ADRB2 gene encoding the beta-adrenergic receptor (ADRB2) are associated with changes in a variety of responses of the sympathetic nervous system (SNS). In this study, we have investigated the distribution of frequencies of ADRB2-related allelic variants (Arg16Gly, Gln27Glu, Thr164Ile) in the Colombian population, as well as the influence of the Gln27Glu polymorphism as a risk factor for the development of dyslipidemia following propranolol administration. Genotyping was performed in unrelated Colombian volunteers, using PCR-RFLP methods. To examine the association between the Gln27Glu polymorphism of the ADRB2 gene and dyslipidemia induced by propranolol, we recruited 19 healthy individuals who were homozygous for either the Gln27 (wild-type, N = 11) or the Glu27 (homozygous mutant, N = 8) genotype. Electrocardiography (ECG), heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), body mass index (BMI), serum lipid levels (T-CHO, HDL-CHO, TG), and fibrinogen were determined before and after propranolol administration. The distribution of genotypes was as follows: Arg16Arg 46%, Arg16Gly 47.4%, Gly16Gly 6.6%, Gln27Gln 44.7%, Gln27Glu 48.2%, and Glu27Glu 7.1%, with allelic frequencies of 69.7% for Arg16, 30.3% for Gly16, 68.8% for Gln27, and 31.2% for Glu27. The Thr164Ile polymorphism was found only in one subject, who was heterozygous for the isoleucine variant. Significant changes in physiological parameters (HR, SBP, DBP) have been found in association with ADRB2 variants in both native and mutant subgroups after propranolol intake. HDL-CHO levels diminished (p = 0.005) in native homozygous individuals (Gln27Gln), whereas TG levels were found increased (p = 0.012) in the mutant homozygous individuals (Glu27Glu). T-CHO levels and serum fibrinogen levels remained unaltered in both subgroups. The evidence that subjects homozygous for Gln27 in the ADRB2 gene show a significant reduction of HDL-CHO levels, as well as the increased TG levels in subjects homozygous for Glu27 after propranolol administration, suggest that the Gln27Glu polymorphism represents a risk factor for dyslipidemia induced by propranolol. These results may contribute to a better understanding of the mechanisms underlying dyslipidemia induced by ADRB2 antagonists. |
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Authors:
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C Isaza; J Henao; E Ramirez; F Cuesta; R Cacabelos |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Methods and findings in experimental and clinical pharmacology Volume: 27 ISSN: 0379-0355 ISO Abbreviation: Methods Find Exp Clin Pharmacol Publication Date: 2005 May |
Date Detail:
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Created Date: 2005-08-05 Completed Date: 2005-09-01 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7909595 Medline TA: Methods Find Exp Clin Pharmacol Country: Spain |
Other Details:
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Languages: eng Pagination: 237-44 Citation Subset: IM |
Copyright Information:
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Copyright 2005 Prous Science. All rights reserved. |
Affiliation:
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Laboratory of Medical Genetics, Pereira Technological University Medical School, Pereira, Colombia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adrenergic beta-Antagonists / blood, pharmacology* Adult Blood Pressure / drug effects Cholesterol, HDL / drug effects, metabolism Colombia / epidemiology Female Gene Frequency Genotype Heart Rate / drug effects Humans Hyperlipidemias / chemically induced, genetics*, physiopathology Male Phenotype Polymorphism, Genetic Propranolol / blood, pharmacology* Receptors, Adrenergic, beta-2 / genetics* Triglycerides / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Adrenergic beta-Antagonists; 0/Cholesterol, HDL; 0/Receptors, Adrenergic, beta-2; 0/Triglycerides; 525-66-6/Propranolol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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