A study of the association between one carbon metabolism and blood pressure in adults and transgenerationally between pregnant women and their children.

Identifier:  TDX:3024

Handle: https://hdl.handle.net/20.500.11797/TDX3024

Authors:  Ornosa Martín, Gemma

Abstract:
One carbon metabolism nutrients and the MTHFR 677 C>T polymorphism have been found to be associated with blood pressure and hypertension. and the mechanism associated is thoughtIt is possible that the underlying mechanism may involve to be fetal programming.. An adequate status of 1C metabolism nutrients has been proven to be beneficial for some health outcomes in adults population and also in pregnancy, from in utero development until later in life including childhood and adulthood. The aim of this thesis is to explore the associations between 1C metabolism nutrients, including B-vitamins and tHcy, as well as the MTHFR 677C>T polymorphism, and blood pressure and hypertension in two different populations, an adult population and a mother-child study with follow-up during pregnancy and children at 7.5 years. Seven hundred and eighty eight participants randomly selected from the population town halls' registers participated in the population study. This population is unexposed to mandatory folic acid fortification and B vitamin supplement use. Being in the 3rd tertile of tHcy compared to the 1st increases the risk of having hypertension 1.8 times [OR=1.8 (1.0, 3.3)] in the total population. Stratifying for age, showed that the association in the >50 years group [OR= 2.5 (1.2, 5.4)] drives the overall result. only the people in the >50 years group showed an association with hypertension [OR= 2.5 (1.2, 5.4)]. Having the TT genotype increases the risk of having hypertension compared to the other genotypes in all models of people aged ≤ 50 years [OR= 8.2 (1.3, 53.9)]. In the Reus-Tarragona Birth Cohort two hundred and twelve mother-child dyads were followed up during pregnancy and children at 7.5 years. The prevalence of child hypertension was 6.2%. Child CT genotype increases the risk of having prehypertension/+hypertension 6.5 times [OR= 6.5 (1.0, 43.5)] in the office BP model. Maternal MTHFR 677 CT genotype increases the risk of having prehypertension/ hypertension and prehypertension 7.4 times [OR= 7.4 (1.0, 55.0)]. The association between the genotypes and prehypertension/ hypertension is maintained aftereven adjusting for classical other risk factors.