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Balderrabano-Saucedo N.A.,Hospital Infantil de Mexico Federico Gomez HIMFG | Sanchez-Urbina R.,Laboratorio Of Investigacion En Biologia Del Desarrollo Y Teratogenesis Experimental | Sierra-Ramirez J.A.,National Polytechnic Institute of Mexico | Sierra-Ramirez J.A.,Instituto Nacional Of Perinatologia | And 7 more authors.
Pediatric Cardiology | Year: 2013

Congenital heart defects (CHD) are the third leading cause of death in children <1 year of age in Mexico where there is a high prevalence of the 677C→T polymorphism of the MTHFR gene. This is important because the homozygous 677T/T MTHFR gene and deficiency of folic acid (FA) intake have been associated with CHD. Our objective was to analyze the possible association between the genotype 677T/T of the MTHFR gene and supplementation of FA in Mexican women with the presence of complex CHD in their children. We analyzed genotypes of 31 mothers of children with complex CHD (group I) and 62 mothers of healthy children (group II) and investigated FA supplementation during pregnancy in both study groups. Allele frequencies in group I were 41.9 % for C and 58.1 % for T and 22.6 % for genotype frequencies CC, 38.7 % for CT, and 38.7 % for TT. Allele frequencies in group II were 63.7 % for C and 36.3 % for T and 38.7 % for genotype frequencies CC, 50 % for CT and 11.3 % for TT. Both populations are in Hardy-Weinberg equilibrium. Odds ratio for having a child with a complex CHD was 5.9, p = 0.008 (95 % CI 1.67; 20.63) for the TT genotype. FA supplementation at any time during pregnancy was 90.3 and 87.9 % in groups II and I respectively (p > 0.05). Association was found between the maternal genotype (677/TT MTHFR) with the presence of complex CHD in their offspring. No differences in FA supplementation during any stage were found between groups. © 2012 Springer Science+Business Media, LLC. Source

Garcia M.S.,Laboratorio Of Investigacion En Biologia Del Desarrollo Y Teratogenesis Experimental | Klunder M.K.,Hospital Infantil de Mexico Federico Gomez | Arias M.M.,UMAE Hospital de Cardiologia | Hermosillo H.V.,Servicio de Medicina Nuclear Molecular | Martinez B.L.,Hospital Infantil de Mexico Federico Gomez
Acta Bioquimica Clinica Latinoamericana | Year: 2015

Numerous studies have shown that plasma levels of cystatin C are more accurate than creatinine estimating the Glomerular Filtration Rate (eGFR), however they are not used as a routine test in the diagnosis of pediatric renal pathologies. The aim of this study was to determine GFR for cystatin C in Mexican pediatric patients exposed to risk factors of Acute Kidney Disease (AKD) compared to children without risk factors for AKD and corroborate the advantages of using this marker in the early diagnosis of kidney diseases in relation to creatinine. A total of 106 samples were analyzed to estimate the GFR. Creatinine and cystatin C concentration were quantified by substituting the values in the MDRD v-4 and Filler and Lepage formulas respectively. The concentrations of both creatinine and cystatin between the study groups were compared by Mann Whitney. Likewise, the correlation between these two metabolites divided by presence or absence of risk factors present in renal disease was assessed. A correlation between creatinine and serum cystatin C concentrations was observed in both groups of patients without risk factors of AKD (r=0.936, p<0.001) and in those who presented risk factors of AKD (r=0.952 , p<0.001). The risk factor group showed higher concentrations of cystatin and creatinine as well as eTFG for both metabolites. Cystatin C shows a good correlation with creatinine. Furthermore, altered cystatin identified a greater number of patients with risk factors of AKD and it is proposed as a screening test in pediatric patients. Source

Gallardo J.M.,Instituto Mexicano del Seguro Social | Gomez-Lopez J.,Hospital de la Mujer | Gomez-Lopez J.,National Polytechnic Institute of Mexico | Medina-Bravo P.,Hospital Infantil de Mexico Federico Gomez | And 5 more authors.
Obesity | Year: 2015

Objective Obesity before pregnancy is associated with a greater risk for the offspring to develop obesity and diabetes in childhood and adulthood. The aim of the present study was to determine the association between maternal overweight or obesity before pregnancy and newborn oxidative stress (OS). Methods Seventy-two mother-child pairs were divided according to the pre-gestational body mass index (BMI) of the mothers as follows: eutrophic (n = 21), overweight (n = 32), and obese (n = 19). Malondialdehyde (MDA) and nitric oxide (NO) were measured in the plasma of a blood sample from the newborn's umbilical cord. Results The MDA levels of newborns increased with maternal BMI (P = 0.001), as did the levels of NO (P = 0.019). There was a direct correlation between MDA and NO levels in each of the three groups (eutrophic: R2 = 0.59, P < 0.001; overweight: R2 = 0.45, P < 0.001; and obese: R2 = 0.26, P = 0.024). Conclusions Maternal overweight and obesity before pregnancy are associated with increased OS in the offspring. © 2015 The Obesity Society. Source

Salazar Garcia M.,Laboratorio Of Investigacion En Biologia Del Desarrollo Y Teratogenesis Experimental | Salazar Garcia M.,National Polytechnic Institute of Mexico | Reyes Maldonado E.,National Polytechnic Institute of Mexico | Revilla Monsalve M.C.,Instituto Mexicano del Seguro Social | And 3 more authors.
Journal of Diabetes Research | Year: 2015

We investigated whether maternal diabetes induced in rats using streptozotocin (STZ) on Day 5 of pregnancy affects the intrauterine developmental timeline. A total of 30 pregnant Sprague-Dawley diabetic rats (DRs) and 20 control rats (CRs) were used to obtain 21-day fetuses (F21) and newborn (NB) pups. Gestational age, weight, and body size were recorded as were the maxillofacial morphometry and morphohistological characteristics of the limbs. In DRs, pregnancy continued for ∼1.7 days, and delivery occurred 23 days postcoitus (DPC). In this group, the number of pups was lower, and 13% had maxillofacial defects. F21 in the DR group had lower weights and were smaller; moreover, the morphological characteristics of the maxillofacial structures, derived from the neural crest, were discordant with their chronological gestational age, resembling 18- to 19-day-old fetuses. These deficiencies were counterbalanced in NB pups. We conclude that hyperglycemia, which results from maternal diabetes and precedes embryo implantation, deregulates the intrauterine developmental timeline, restricts embryo-fetal growth, and primarily delays the remodeling and maturation of the structures derived from neural crest cells. © 2015 Marcela Salazar García et al. Source

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