Revista Romana de PEDIATRIE | Volumul LXIII, Nr. 4, An 2014
ISSN 1454-0398  |  e-ISSN 2069-6175
ISSN-L 1454-0398

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Essential arterial hypertension is a multifactor pathology and in its realization genetic and environmental factors play a very important role. It is estimated that 30-60% of the variation of the arterial hypertension among people is due to genetic factor. Its investigation is argued at children especially, because from age it can be changed under the infl uence of the environment.

Objectives. Estimation of the polymorph variants frequency of the candidate genes from RAS (ACE, AGTR1) and NOS3 at children with arterial hypertension, obesity or overweight. Appreciation of the possible relations between carrying genotypes of the genes studied and the risk of arterial hypertension, overweight and metabolic disorders to appear. Interaction of the genetic factors with the modifi able ones in the appearance of these pathologies.

Material and methods. The investigation included 120 children with obesity and overweight 62 (51.67%) children with hypertension and 58 (48.33%) with normal tension) at the age of 10-18. The polymorphism of the candidate genes was identifi ed through the analysis of the length of the amplifi ed fragments and restriction fragment length polymorphism. The products of restriction were placed in 2% agarose gel and dyed with ethidium bromide. The protocol of the studies was approved by the Commission in Medical Ethics and the signed consent for participation in studies was obtained.

Results. Children-carriers of ACE DD and AGTR1 CC showed increased values of of BMI, CA and SBP. At the carriers of GG and AG genotypes of NOS3 AG were also revealed statistically signifi cant higher values of SBP in comparison with the carriers of AA genotype. At the same time, children with ACE DD genotype were distinguished by the increased serum level of triglycerides (1.90 ± 0.122 mmol/l), insulin (27.27 ± 2.557 μU/ml) and reduced of HDL-C (1.24 ± 0.048 mmol/l). Simultaneously, there were found statistically signifi cant differences between small gestational age and genotype DD of ACE and between big gestational age and genotype ID of ACE. DD carriers of the ACE and CC carriers of the AGTR1 also proved to be more often passive smokers, consumers of the products with higher concentration of salt and fat. Conclusion. Identifi cation of the children with obesity/overweight carriers of genotypes ACE DD, AGTR CC and NOS GG could facilitate early detection of the children with the risk of appearance of arterial hypertension and metabolic disorders to add to taking early measures for prophylaxis and treatment.

Keywords: arterial hypertension, overweight/obesity, gene polymorphism, genotype, candidate gene

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