Trend odkládání reprodukce vede k vyššímu procentu plánovaných početí. To umožňuje prekoncepční intervenci. Nejlépe dokumentován je význam podávání folátů, které snižují výskyt defektů neurální trubice, vrozených srdečních vad, vrozených vad uropoetického traktu, plodů s nižší porodní váhou, patologií placenty a spontánních potratů. Suplementaci foláty minimálně měsíc před otěhotněním a v 1. trimestru doporučuje 17 německých odborných společností. Metylfolát [(6S)-5methyltetrahydrofolát] je biologicky aktivní folát, který není závislý na aktivitě MTHFR. K dosud jediné dostupné kalciové soli (označované jako 3. generace folátu) nově přibývá glukosaminová sůl metylfolátu (4. generace folátu), charakterizovaná vyšší stabilitou, rozpustností a biologickou dostupností., The tendency of reproduction delay leads to a higher rate of planned conception. This allows preconception intervention. The importance of folate administration is well documented. Folates reduce the incidence of neural tube defects, congenital heart defects, congenital anomalies of urinary tract, foetuses with lower birth weight, placental pathology and spontaneous abortion. Seventeen German professional societies recommend folate supplementation for at least one month before pregnancy and in the first trimester. Methylfolate [(6S) -5methyltetrahydrofolic acid] is the biologically active folate which is not dependent on the activity of MTHFR. Recently, glucosamine salt of methylfolate (folate of 4th generation) has been introduced and is characterized by greater stability, solubility and bioavalability in comparison to known calcium salts (folate of 3rd generation)., and Tomáš Fait
BACKGROUND: The presence of several risk factors (genetic and non-genetic) has greater impact on the risk of premature coronary artery disease (CAD) than single risk factor. OBJECTIVE: The aim of the study was to establish possible relations between genotypes and alleles of 677C>T polymorphism of MTHFR gene and some traditional risk factors e.g. elevated levels of lipid parameters and smoking in development of premature CAD. METHODS: The groups comprised 152 patients with angiographically documented premature CAD (aged 42.9 +/- 5.5) and 121 age-matched blood donors (aged 42.3 +/- 6.5) were studied. The MTHFR 677C>T polymorphism was genotyped with Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) method. RESULTS: Patients with TT genotype who simultaneously smoked had increased risk of premature CAD compared to non-smoking cases with CC genotype (OR = 24.62). We also found that individuals with TT genotype and elevated LDL-cholesterol (LDL-chol.) level had significantly higher risk of CAD (OR = 9.92) than individuals with normal LDL-chol. level and CC genotype. CONCLUSIONS: The present study shows that simultaneous presence of MTHFR TT genotype and smoking or elevated levels of LDL-chol. influences the risk of premature CAD. This findings give interesting contribution to gene-environment interaction problem that may have clinical implications in the future. and B. Sarecka-Hujar, I. Zak, J. Krauze