Citations 2
AHRR Hypomethylation mediates the association between maternal smoking and metabolic profiles in children
Vidal, Adriana C. , Chandramouli, Shivram , Marchesoni, Joddy , Brown, Nia, Maguire, Rachel L. , Mavis, Alisha , Bashir, Mustafa R. , Skaar, David , Hoyo, Cathrine , Moylan, Cynthia A. , Abdelmalek, Manal F. , Moylan, Cynthia A , Liu, Yukun , Murphy, Susan K. , Wang, Yaxu , Jima, Dereje D.
Hepatology Communications | September 27, 2023 | Volume: 7 | Issue: 10 | Pages: No page available
Background: Tobacco smoking during pregnancy is associated with metabolic dysfunction in children, but mechanistic insights remain limited. Hypomethylation of cg05575921 in the aryl hydrocarbon receptor repressor (AHRR) gene is associated with in utero tobacco smoke exposure. In this study, we evaluated whether AHRR hypomethylation mediates the association between maternal smoking and metabolic dysfunction in children. Methods: We assessed metabolic dysfunction using liver fat content (LFC), serum, and clinical data in children aged 7–12 years (n=78) followed since birth. Maternal smoking was self-reported at 12 weeks gestation. Methylation was measured by means of pyrosequencing at 3 sequential CpG sites, including cg05575921, at birth and at ages 7–12. Regression models were used to evaluate whether AHRR methylation mediated the association between maternal smoking and child metabolic dysfunction. Results: Average AHRR methylation at birth was significantly higher among children of nonsmoking mothers compared with children of mothers who smoked (69.8% ± 4.4% vs. 63.5% ± 5.5, p=0.0006). AHRR hypomethylation at birth was associated with higher liver fat content (p=0.01), triglycerides (p=0.01), and alanine aminotransferase levels (p=0.03), and lower HDL cholesterol (p=0.01) in childhood. AHRR hypomethylation significantly mediated associations between maternal smoking and liver fat content (indirect effect=0.213, p=0.018), triglycerides (indirect effect=0.297, p=0.044), and HDL cholesterol (indirect effect = -0.413, p=0.007). AHRR methylation in childhood (n=78) was no longer significantly associated with prenatal smoke exposure or child metabolic parameters (p>0.05). Conclusions: AHRR hypomethylation significantly mediates the association between prenatal tobacco smoke exposure and features of childhood metabolic dysfunction, despite the lack of persistent hypomethylation of AHRR into childhood. Further studies are needed to replicate these findings and to explore their causal and long-term significance.
Evaluation of vitamin D biosynthesis and pathway target genes reveals UGT2A1/2 and EGFR polymorphisms associated with epithelial ovarian cancer in African American Women
Grant, Delores J. , Alberg, Anthony J. , Barnholtz‐Sloan, Jill S. , Bondy, Melissa L. , Funkhouser, Ellen, Moorman, Patricia G. , Peres, Lauren C. , Peters, Edward , Schwartz, Ann G. , Terry, Paul , Wang, Xin‐Qun, Hoyo, Cathrine , Sandler, Dale P. , Taylor, Jack A. , Edwards, Todd L., Beeghly‐Fadiel, Alicia, Wentzensen, Nicolas , Pearce, Celeste Leigh , Wu, Anna H. , Whittemore, Alice S. , McGuire, Valerie , Sieh, Weiva , Rothstein, Joseph H. , Ness, Roberta B., Moysich, Kirsten B. , Rossing, Mary Anne, Sellers, Thomas A. , Monteiro, Álvaro N.A. , Levine, Douglas A. , Haiman, Christopher A. , Menon, Usha , Ramus, Susan J. , Gayther, Simon A. , Terry, Kathryn L. , Goode, Ellen L. , Cannioto, Rikki , Odunsi, Kunle , Etter, John Lewis , Huang, Ruea‐Yea , Bernardini, Marcus Q. , Tone, Alicia , May, Taymaa, Goodman, Marc T. , Thompson, Pamela J., Carney, Michael E. , Tworoger, Shelley S. , Lambrechts, Diether , Vergote, Ignace , Nieuwenhuysen, Els Van , Salvensen, Helga B., Massuger, Leon F.A.G. , Bruegl, Amanda , Moffitt, Melissa , Le, Nhu D. , Brooks‐Wilson, Angela , Kelemen, Linda E. , Song, Honglin , Eccles, Diana , DeFazio, Anna , Kennedy, Catherine J. , Schildkraut, Joellen M. , Lambrechts, Diether , Barnholtz-Sloan, Jill S , Moysich, Kirsten , Permuth, Jennifer B , Cramer, Daniel W , Fazio, Anna de , Lambrechts, Diether , Ramus, Susan J , Sandler, Dale P , Tworoger, Shelley S , Eccles, Diana , Menon, Usha , Monteiro, Alvaro N , Brooks-Wilson, Angela R , Kennedy, Catherine J , Lambrechts, Diether , Sieh, Weiva , Taylor, Jack A , Goodman, Marc T , Manichaikul, Ani , Bandera, Elisa V. , Coté, Michele L. , Keku, Temitope O , Berchuck, Andrew , O’Brien, Katie M. , Edwards, Digna R. Velez , Beeghly‐Fadiel, Alicia , Modugno, Francesmary , Doherty, Jennifer A. , Permuth, Jennifer B. , Setiawan, Veronica Wendy , Marchand, Loı̈c Le , Wilkens, Lynne R. , Karlan, Beth Y. , Gentry‐Maharaj, Aleksandra , Cramer, Daniel W. , Larson, Melissa C. , Kaufmann, Scott H. , Poole, Elizabeth M. , Vanderstichele, Adriaan , Anton‐Culver, Hoda , Ziogas, Argyrios , Brenton, James D. , Bjørge, Line , Kiemeney, Lambertus A. , Pejovic, Tanja B. , Cook, Linda S. , Pharoah, Paul D.P. , Campbell, Ian
Cancer Medicine | April 19, 2019 | Volume: 8 | Issue: 5 | Pages: 2503-2513
AbstractAn association between genetic variants in the vitamin D receptor (VDR) gene and epithelial ovarian cancer (EOC) was previously reported in women of African ancestry (AA). We sought to examine associations between genetic variants in VDR and additional genes from vitamin D biosynthesis and pathway targets (EGFR, UGT1A, UGT2A1/2, UGT2B, CYP3A4/5, CYP2R1, CYP27B1, CYP24A1, CYP11A1, and GC). Genotyping was performed using the custom‐designed 533,631 SNP Illumina OncoArray with imputation to the 1,000 Genomes Phase 3 v5 reference set in 755 EOC cases, including 537 high‐grade serous (HGSOC), and 1,235 controls. All subjects are of African ancestry (AA). Logistic regression was performed to estimate odds ratios (OR) and 95% confidence intervals (CI). We further evaluated statistical significance of selected SNPs using the Bayesian False Discovery Probability (BFDP). A significant association with EOC was identified in the UGT2A1/2 region for the SNP rs10017134 (per allele OR = 1.4, 95% CI = 1.2‐1.7, P = 1.2 × 10−6, BFDP = 0.02); and an association with HGSOC was identified in the EGFR region for the SNP rs114972508 (per allele OR = 2.3, 95% CI = 1.6‐3.4, P = 1.6 × 10−5, BFDP = 0.29) and in the UGT2A1/2 region again for rs1017134 (per allele OR = 1.4, 95% CI = 1.2‐1.7, P = 2.3 × 10−5, BFDP = 0.23). Genetic variants in the EGFR and UGT2A1/2 may increase susceptibility of EOC in AA women. Future studies to validate these findings are warranted. Alterations in EGFR and UGT2A1/2 could perturb enzyme efficacy, proliferation in ovaries, impact and mark susceptibility to EOC.