Bariatric surgery-induced weight loss and associated genome-wide DNA-methylation alterations in obese individuals

Clinical Epigenetics

Research

Lorenza Nisticò¹  Tarik Gheit²  Fazlur Rahman Talukdar³  Zdenko Herceg³  Alexei Novoloaca³  Cyrille Cuenin³  Massimo Tommasino⁴  Ruhina Shirin Laskar⁵  Valeria Guglielmi⁶  Paolo Sbraccia⁶  Eugenia Dogliotti⁷  Paola Fortini⁷  David Israel Escobar Marcillo⁸ 

[1] Centre for Behavioral Sciences and Mental Health, Istituto Superiore Di Sanità, Viale Regina Elena, No. 299, 00161, Rome, Italy;Early Detection, Prevention, and Infections Branch, International Agency for Research On Cancer (IARC), 150 Cours Albert Thomas, Lyon, France;Epigenomics and Mechanisms Branch, International Agency for Research On Cancer (IARC), 150 Cours Albert Thomas, Lyon, France;IRCCS, Istituto Tumori Giovanni Paolo ll, Bari, Italy;Nutrition and Metabolism Branch, International Agency for Research On Cancer (IARC), 150 Cours Albert Thomas, Lyon, France;Obesity Center-Internal Medicine Unit, Department of Systems Medicine, University of Rome Tor Vergata, 00133, Rome, Italy;Section of Mechanisms, Biomarkers and Models, Dept Environment and Health, Istituto Superiore Di Sanità, Viale Regina Elena, No. 299, 00161, Rome, Italy;Section of Mechanisms, Biomarkers and Models, Dept Environment and Health, Istituto Superiore Di Sanità, Viale Regina Elena, No. 299, 00161, Rome, Italy;Obesity Center-Internal Medicine Unit, Department of Systems Medicine, University of Rome Tor Vergata, 00133, Rome, Italy;

关键词: Obesity;    Bariatric surgery;    Epigenetics;    DNA methylation;    Weight loss;    Epigenetic clock;   

DOI  :  10.1186/s13148-022-01401-9

 received in 2022-08-03, accepted in 2022-12-06,  发布年份 2022

来源: Springer

【 摘 要 】

BackgroundObesity is a multifactorial and chronic condition of growing universal concern. It has recently been reported that bariatric surgery is a more successful treatment for severe obesity than other noninvasive interventions, resulting in rapid significant weight loss and associated chronic disease remission. The identification of distinct epigenetic patterns in patients who are obese or have metabolic imbalances has suggested a potential role for epigenetic alterations in causal or mediating pathways in the development of obesity-related pathologies.Specific changes in the epigenome (DNA methylome), associated with metabolic disorders, can be detected in the blood. We investigated whether such epigenetic changes are reversible after weight loss using genome-wide DNA methylome analysis of blood samples from individuals with severe obesity (mean BMI ~ 45) undergoing bariatric surgery.ResultsOur analysis revealed 41 significant (Bonferroni p < 0.05) and 1169 (false discovery rate p < 0.05) suggestive differentially methylated positions (DMPs) associated with weight loss due to bariatric surgery. Among the 41 significant DMPs, 5 CpGs were replicated in an independent cohort of BMI-discordant monozygotic twins (the heavier twin underwent diet-induced weight loss). The effect sizes of these 5 CpGs were consistent across discovery and replication sets (p < 0.05). We also identified 192 differentially methylated regions (DMRs) among which SMAD6 and PFKFB3 genes were the top hypermethylated and hypomethylated regions, respectively. Pathway enrichment analysis of the DMR-associated genes showed that functional pathways related to immune function and type 1 diabetes were significant. Weight loss due to bariatric surgery also significantly decelerated epigenetic age 12 months after the intervention (mean =  − 4.29; p = 0.02).ConclusionsWe identified weight loss-associated DNA-methylation alterations targeting immune and inflammatory gene pathways in blood samples from bariatric-surgery patients. The top hits were replicated in samples from an independent cohort of BMI-discordant monozygotic twins following a hypocaloric diet. Energy restriction and bariatric surgery thus share CpGs that may represent early indicators of response to the metabolic effects of weight loss. The analysis of bariatric surgery-associated DMRs suggests that epigenetic regulation of genes involved in endothelial and adipose tissue function is key in the pathophysiology of obesity.

【 授权许可】

CC BY   
© The Author(s) 2022

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