Infant peripheral blood repetitive element hypomethylation associated with antiretroviral therapy in utero

Carmen J Marsit, Sean S Brummel, Deborah Kacanek, George R Seage 3rd, Stephen A Spector, David A Armstrong, Barry M Lester, Kenneth Rich, Pediatric HIV/AIDS Cohort Studies Network, Ram Yogev, Margaret Ann Sanders, Kathleen Malee, Scott Hunter, William Shearer, Mary Paul, Norma Cooper, Lynnette Harris, Murli Purswani, Emma Stuard, Anna Cintron, Ana Puga, Dia Cooley, Patricia Garvie, James Blood, William Borkowsky, Sandra Deygoo, Helen Rozelman, Arry Dieudonne, Linda Bettica, Susan Adubato, Katherine Knapp, Kim Allison, Megan Wilkins, Midnela Acevedo-Flores, Lourdes Angeli- Nieves, Vivian Olivera, Hermann Mendez, Ava Dennie, Susan Bewley, Chi Dola, Robert Maupin, Karen Craig, Patricia Sirois, Marilyn Crain, Newana Beatty, Dan Marullo, Stephen Spector, Jean Manning, Sharon Nichols, Elizabeth McFarland, Jenna Wallace, Carrie Chambers, Christine Reed, Mobeen Rathore, Kristi Stowers, Ann Usitalo, Kenneth Rich, Lourdes Richardson, Renee Smith, Gwendolyn Scott, Claudia Florez, Elizabeth Willen, Toni Frederick, Mariam Davtyan, Maribel Mejia, Zoe Rodriguez, Ibet Heyer, Nydia Scalley Trifilio, Carmen J Marsit, Sean S Brummel, Deborah Kacanek, George R Seage 3rd, Stephen A Spector, David A Armstrong, Barry M Lester, Kenneth Rich, Pediatric HIV/AIDS Cohort Studies Network, Ram Yogev, Margaret Ann Sanders, Kathleen Malee, Scott Hunter, William Shearer, Mary Paul, Norma Cooper, Lynnette Harris, Murli Purswani, Emma Stuard, Anna Cintron, Ana Puga, Dia Cooley, Patricia Garvie, James Blood, William Borkowsky, Sandra Deygoo, Helen Rozelman, Arry Dieudonne, Linda Bettica, Susan Adubato, Katherine Knapp, Kim Allison, Megan Wilkins, Midnela Acevedo-Flores, Lourdes Angeli- Nieves, Vivian Olivera, Hermann Mendez, Ava Dennie, Susan Bewley, Chi Dola, Robert Maupin, Karen Craig, Patricia Sirois, Marilyn Crain, Newana Beatty, Dan Marullo, Stephen Spector, Jean Manning, Sharon Nichols, Elizabeth McFarland, Jenna Wallace, Carrie Chambers, Christine Reed, Mobeen Rathore, Kristi Stowers, Ann Usitalo, Kenneth Rich, Lourdes Richardson, Renee Smith, Gwendolyn Scott, Claudia Florez, Elizabeth Willen, Toni Frederick, Mariam Davtyan, Maribel Mejia, Zoe Rodriguez, Ibet Heyer, Nydia Scalley Trifilio

Abstract

The use of combination antiretroviral therapy (cART) to prevent HIV mother-to-child transmission during pregnancy and delivery is generally considered safe. However, vigilant assessment of potential risks of these agents remains warranted. Epigenetic changes including DNA methylation are considered potential mechanisms linking the in utero environment with long-term health outcomes. Few studies have examined the epigenetic effects of prenatal exposure to pharmaceutical agents, including antiretroviral therapies, on children. In this study, we examined the methylation status of the LINE-1 and ALU-Yb8 repetitive elements as markers of global DNA methylation alteration in peripheral blood mononuclear cells obtained from newborns participating in the Pediatric HIV/AIDS Cohort Study SMARTT cohort of HIV-exposed, cART-exposed uninfected infants compared to a historical cohort of HIV-exposed, antiretroviral-unexposed infants from the Women and Infants Transmission Study Cohort. In linear regression models controlling for potential confounders, we found the adjusted mean difference of AluYb8 methylation of the cART-exposed compared to the -unexposed was -0.568 (95% CI: -1.023, -0.149) and for LINE-1 methylation was -1.359 (95% CI: -1.860, -0.857). Among those exposed to cART, subjects treated with atazanavir (ATV), compared to those on other treatments, had less AluYb8 methylation (-0.524, 95% CI: -0.025, -1.024). Overall, these results suggest a small but statistically significant reduction in the methylation of these repetitive elements in an HIV-exposed, cART-exposed cohort compared to an HIV-exposed, cART-unexposed historic cohort. The potential long-term implications of these differences are worthy of further examination.

Keywords: DNA methylation; HIV; anti-retroviral; atazanavir; developmental origins; newborn; pediatrics; pharmaceuticals; prenatal; repetitive elements.

Figures

Figure 1.
Figure 1.
Distributions of (A) LINE-1 and (B) AluYb8 methylation extent at individual CpG sites, and the mean across the sequenced regions with and without batch adjustment

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