scholarly journals Interplay between polymorphisms and methylation in the H19/IGF2 gene region may contribute to obesity in Mexican-American children

2013 ◽  
Vol 4 (6) ◽  
pp. 499-506 ◽  
Author(s):  
M. A. Hernández-Valero ◽  
J. Rother ◽  
I. Gorlov ◽  
M. Frazier ◽  
O. Gorlova
Keyword(s):  
Childhood Obesity ◽  
Mexican American ◽  
Methylation Status ◽  
Differentially Methylated Region ◽  
Single Nucleotide ◽  
Cpg Site ◽  
Significant Difference ◽  
High Prevalence ◽  
American Children ◽  
Lean Children

Imprinted genes often affect body size-related traits such as weight. However, the association of imprinting with obesity, especially childhood obesity, has not been well studied. Mexican-American children have a high prevalence, approaching 50%, of obesity and/or overweight. In a pilot study of 75 Mexican-American children, we analyzed the relationships among obese/overweight status, methylation status and single-nucleotide polymorphism (SNP) status at a CpG site in a differentially methylated region (DMR) of the imprinted H19/IGF2 locus. We observed a significant difference in SNP rs10732516 frequency between boys and girls among the overweight and obese children but not among the lean children. We also found that children with lower methylation of the polymorphic CpG site (CpG4) in the H19 DMR had higher birth weights than did children with higher methylation (P= 0.04). Our results suggest that CpG4 methylation status may be associated with childhood obesity in Mexican-American children in a sex-specific manner.

scholarly journals Metabolites as novel biomarkers for childhood obesity-related traits in Mexican-American children

2014 ◽  
Vol 10 (4) ◽  
pp. 320-327 ◽  
Author(s):  
V. S. Farook ◽  
L. Reddivari ◽  
G. Chittoor ◽  
S. Puppala ◽  
R. Arya ◽  
...  
Keyword(s):  
Childhood Obesity ◽  
Mexican American ◽  
Novel Biomarkers ◽  
American Children

scholarly journals Prenatal phthalate exposure and 8-isoprostane among Mexican-American children with high prevalence of obesity

2016 ◽  
Vol 8 (2) ◽  
pp. 196-205 ◽  
Author(s):  
V. Tran ◽  
G. Tindula ◽  
K. Huen ◽  
A. Bradman ◽  
K. Harley ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Mexican American ◽  
Pediatric Population ◽  
Age Groups ◽  
Environmental Chemicals ◽  
Neurodevelopmental Outcomes ◽  
High Prevalence ◽  
Prevalence Of Obesity ◽  
American Children ◽  
Altered Lipid

Oxidative stress has been linked to many obesity-related conditions among children including cardiovascular disease, diabetes mellitus and hypertension. Exposure to environmental chemicals such as phthalates, ubiquitously found in humans, may also generate reactive oxygen species and subsequent oxidative stress. We examined longitudinal changes of 8-isoprostane urinary concentrations, a validated biomarker of oxidative stress, and associations with maternal prenatal urinary concentrations of phthalate metabolites for 258 children at 5, 9 and 14 years of age participating in a birth cohort residing in an agricultural area in California. Phthalates are endocrine disruptors, and in utero exposure has been also linked to altered lipid metabolism, as well as adverse birth and neurodevelopmental outcomes. We found that median creatinine-corrected 8-isoprostane concentrations remained constant across all age groups and did not differ by sex. Total cholesterol, systolic and diastolic blood pressure were positively associated with 8-isoprostane in 14-year-old children. No associations were observed between 8-isoprostane and body mass index (BMI), BMI Z-score or waist circumference at any age. Concentrations of three metabolites of high molecular weight phthalates measured at 13 weeks of gestation (monobenzyl, monocarboxyoctyl and monocarboxynonyl phthalates) were negatively associated with 8-isoprostane concentrations among 9-year olds. However, at 14 years of age, isoprostane concentrations were positively associated with two other metabolites (mono(2-ethylhexyl) and mono(2-ethyl-5-carboxypentyl) phthalates) measured in early pregnancy. Longitudinal data on 8-isoprostane in this pediatric population with a high prevalence of obesity provides new insight on certain potential cardiometabolic risks of prenatal exposure to phthalates.

1337-P: Prediction of Insulin Sensitivity Using Serum Carotenoid Concentrations and Pediatric Metabolic Index in Mexican-American Children

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 1337-P
Author(s):  
SRINIVAS MUMMIDI ◽  
JOSELIN HERNANDEZ-RUIZ ◽  
VIDYA S. FAROOK ◽  
LAVANYA REDDIVARI ◽  
ALVARO DIAZ-BADILLO ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Mexican American ◽  
Metabolic Index ◽  
American Children

2093-P: Acanthosis Nigricans as a Composite Marker of Cardiometabolic Risk and Its Complex Association with Obesity and Insulin Resistance in Mexican-American Children

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 2093-P
Author(s):  
JUAN C. LOPEZ-ALVARENGA ◽  
RECTOR ARYA ◽  
GEETHA CHITTOOR ◽  
SOLOMON FRANKLIN PAUL ◽  
SOBHA R. PUPPALA ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Mexican American ◽  
Acanthosis Nigricans ◽  
Cardiometabolic Risk ◽  
American Children

Fas gene promoter –670 polymorphism in gynecological cancer

2006 ◽  
Vol 16 (Suppl 1) ◽  
pp. 179-182 ◽  
Author(s):  
M. Ueda ◽  
Y. Terai ◽  
K. Kanda ◽  
M. Kanemura ◽  
M. Takehara ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cervical Cancer ◽  
Cancer Patients ◽  
Germ Line ◽  
Gynecological Cancer ◽  
Gene Promoter ◽  
Single Nucleotide ◽  
Increased Risk ◽  
Significant Difference ◽  
Germ Line Polymorphism

Single-nucleotide polymorphism at −670 of Fas gene promoter (A/G) was examined in a total of 354 blood samples from normal healthy women and gynecological cancer patients. They consisted of 95 normal, 83 cervical, 108 endometrial, and 68 ovarian cancer cases. Eighty-three patients with cervical cancer had statistically higher frequency of GG genotype and G allele than 95 controls (P= 0.0353 and 0.0278, respectively). There was no significant difference in the genotype or allele prevalence between control subjects and endometrial or ovarian cancer patients. The Fas −670 GG genotype was associated with an increased risk for the development of cervical cancer (OR = 2.56, 95% CI = 1.08–6.10) compared with the AA genotype. The G allele also increased the risk of cervical cancer (OR = 1.60, 95% CI = 1.05–2.43) compared with the A allele. Germ-line polymorphism of Fas gene promoter −670 may be associated with the risk of cervical cancer in a Japanese population.

scholarly journals Investigation of TAGAP gene polymorphism (rs1738074) in Turkish pediatric celiac patients

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Melek Pehlivan ◽  
Tülay K. Ayna ◽  
Maşallah Baran ◽  
Mustafa Soyöz ◽  
Aslı Ö. Koçyiğit ◽  
...  
Keyword(s):  
Pediatric Patients ◽  
Disease Risk ◽  
Polymerase Chain Reaction Method ◽  
Control Group ◽  
Healthy Children ◽  
Single Nucleotide ◽  
Significant Difference ◽  
Allele Specific ◽  
And Control

Abstract Objectives There are several hypotheses on the effects of the rs1738074 T/C single nucleotide polymorphism in the TAGAP gene; however, there has been no study on Turkish pediatric patients. We aimed to investigate the association of celiac disease (CD) and type 1 diabetes mellitus (T1DM) comorbidity with the polymorphism in the TAGAP gene of Turkish pediatric patients. Methods Totally, 127 pediatric CD patients and 100 healthy children were included. We determined the polymorphism by the allele-specific polymerase chain reaction method. We used IBM SPSS Statistics version 25.0 and Arlequin 3.5.2 for the statistical analyses. The authors have no conflict of interest. Results It was determined that 72% (n=154) of only CD patients had C allele, whereas 28% (n=60) had T allele. Of the patients with celiac and T1DM, 42.5% (n=17) and 57.5% (n=23) had T and C alleles, respectively. Of the individuals in control group, 67% (n=134) had C allele, whereas 33% (n=66) had T allele. Conclusions There was no significant difference in the genotype and allele frequencies between the patient and control groups (p>0.05). There was no significant association between the disease risk and the polymorphism in our study group.

scholarly journals Sex Differences in Circadian Clock Genes and Myocardial Infarction Susceptibility

2021 ◽  
Vol 8 (5) ◽  
pp. 53
Author(s):  
Ivana Škrlec ◽  
Jasminka Talapko ◽  
Martina Juzbašić ◽  
Robert Steiner
Keyword(s):  
Myocardial Infarction ◽  
Cardiovascular Disease ◽  
Circadian Rhythm ◽  
Single Nucleotide Polymorphisms ◽  
Clock Genes ◽  
P Value ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Biological Sex ◽  
Significant Difference

The growing body of evidence shows a significant difference in the circadian rhythm of cardiovascular disease based on biological sex. The incidence of cardiovascular disease varies between women and men. Additionally, biological sex is vital for the timely application of therapy—chronotherapy, which benefits both sexes. This study aimed to examine the potential difference of single nucleotide polymorphisms (SNPs) of the circadian rhythm genes ARNTL, CLOCK, CRY2 and PER2 in women and men with myocardial infarction. A cross-sectional study was conducted, including 200 patients with myocardial infarction. Altogether, ten single nucleotide polymorphisms in the ARNTL, CLOCK, CRY2 and PER2 genes were analyzed. The Chi-square test yielded statistically significant differences in CLOCK gene rs11932595 polymorphism in a recessive genotype model between women and men with a p-value of 0.03 and an odds ratio 2.66, and a corresponding 95% confidence interval of 1.07 to 6.66. Other analyzed polymorphisms of the circadian rhythm genes ARNTL, CRY2, and PER2 did not significantly differ between the sexes. According to the study’s current results, the CLOCK gene’s genetic variability might affect myocardial infarction concerning biological sex.

scholarly journals Somatotroph Tumors and the Epigenetic Status of the GNAS Locus

2021 ◽  
Vol 22 (14) ◽  
pp. 7570
Author(s):  
Pauline Romanet ◽  
Justine Galluso ◽  
Peter Kamenicky ◽  
Mirella Hage ◽  
Marily Theodoropoulou ◽  
...  
Keyword(s):  
Genomic Analysis ◽  
Somatostatin Analogues ◽  
Differentially Methylated Region ◽  
Monoallelic Expression ◽  
Lower Sensitivity ◽  
Biallelic Expression ◽  
Expression Levels ◽  
Methylation Index ◽  
Significant Difference ◽  
Gsp Oncogene

Background: Forty percent of somatotroph tumors harbor recurrent activating GNAS mutations, historically called the gsp oncogene. In gsp-negative somatotroph tumors, GNAS expression itself is highly variable; those with GNAS overexpression most resemble phenotypically those carrying the gsp oncogene. GNAS is monoallelically expressed in the normal pituitary due to methylation-based imprinting. We hypothesize that changes in GNAS imprinting of gsp-negative tumors affect GNAS expression levels and tumorigenesis. Methods: We characterized the GNAS locus in two independent somatotroph tumor cohorts: one of 23 tumors previously published (PMID: 31883967) and classified by pan-genomic analysis, and a second with 82 tumors. Results: Multi-omics analysis of the first cohort identified a significant difference between gsp-negative and gsp-positive tumors in the methylation index at the known differentially methylated region (DMR) of the GNAS A/B transcript promoter, which was confirmed in the larger series of 82 tumors. GNAS allelic expression was analyzed using a polymorphic Fok1 cleavage site in 32 heterozygous gsp-negative tumors. GNAS expression was significantly reduced in the 14 tumors with relaxed GNAS imprinting and biallelic expression, compared to 18 tumors with monoallelic expression. Tumors with relaxed GNAS imprinting showed significantly lower SSTR2 and AIP expression levels. Conclusion: Altered A/B DMR methylation was found exclusively in gsp-negative somatotroph tumors. 43% of gsp-negative tumors showed GNAS imprinting relaxation, which correlated with lower GNAS, SSTR2 and AIP expression, indicating lower sensitivity to somatostatin analogues and potentially aggressive behavior.

scholarly journals Significant Associations of lncRNA H19 Genotypes with Susceptibility to Childhood Leukemia in Taiwan

2021 ◽  
Vol 14 (3) ◽  
pp. 235
Author(s):  
Jen-Sheng Pei ◽  
Chao-Chun Chen ◽  
Wen-Shin Chang ◽  
Yun-Chi Wang ◽  
Jaw-Chyun Chen ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Childhood Leukemia ◽  
Healthy Controls ◽  
Nucleotide Polymorphisms ◽  
Wild Type ◽  
Single Nucleotide ◽  
Genotypic Distribution ◽  
Heterozygous Variant ◽  
Significant Difference ◽  
The Difference

The purpose of our study was to investigate whether genetic variations in lncRNA H19 were associated with susceptibility to childhood leukemia. Two hundred and sixty-six childhood leukemia patients and 266 healthy controls were enrolled in Taiwan, and two single nucleotide polymorphisms (SNPs), rs2839698 and rs217727, in H19 were genotyped and analyzed. There was a significant difference in the genotypic distribution of rs2839698 between patients and healthy controls (p = 0.0277). Compared to the wild-type CC genotype, the heterozygous variant CT and homozygous variant TT genotypes were associated with significantly increased risks of childhood leukemia with an adjusted odd ratio (OR) of 1.46 (95% confidence interval (CI), 1.08–2.14, p = 0.0429) and 1.94 (95%CI, 1.15–3.31, p = 0.0169), respectively (pfor tread = 0.0277). The difference in allelic frequencies between childhood leukemia patients and controls was also significant (T versus C, adjusted OR = 1.53, 95%CI, 1.13–1.79, p = 0.0077). There were no significant differences in the genotypic and allelic distributions of rs217727 between cases and controls. Interestingly, the average level of H19 rs2839698 was statistically significantly higher for patients with CT and TT genotypes than from those with the CC genotype (p < 0.0001). Our results indicate that H19 SNP rs2839698, but not rs217727, may serve as a novel susceptibility marker for childhood leukemia.

Sign in / Sign up

Export Citation Format

Share Document