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Sánchez EC, Barajas-Olmos F, Baca P, Zerrweck C, Guilbert L, Martínez-Hernández A, Centeno F, Orozco L. DNA Methylation Remodeling after Bariatric Surgery Correlates with Clinical Parameters. Adv Biol (Weinh) 2023; 7:e2300001. [PMID: 37144655 DOI: 10.1002/adbi.202300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 03/27/2023] [Indexed: 05/06/2023]
Abstract
The altered functions of adipose tissue are one of the main issues in obesity. Bariatric surgery is associated with improvement of obesity associated comorbidities. Here DNA methylation remodeling in adipose tissue after bariatric surgery is examined. After six months postoperative, DNA methylation shows changes in 1155 CpG sites, 66 of these sites correlate with body mass index. Some sites also show correlation with LDL-C, HDL-C, total cholesterol, and triglycerides. CpG sites are located in genes that have not previously been linked to obesity or metabolic diseases. GNAS complex locus is one of those that presented CpG site with the greatest changes after surgery, and the most significant correlation with BMI and lipid profiles. These results show that epigenetic regulation may be involved in the alteration of adipose tissue functions in obesity.
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Affiliation(s)
- Ernesto Carlos Sánchez
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Cto. de los Posgrados, Ciudad Universitaria, Mexico City, Coyoacán, 04510, Mexico
| | - Francisco Barajas-Olmos
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
| | - Paulina Baca
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
| | - Carlos Zerrweck
- Facultad de Medicina, Alta especialidad en Cirugía Bariatrica, UNAM, Escolar 411A, Copilco Universidad, Mexico City, Coyoacán, 04360, Mexico
| | - Lizbeth Guilbert
- Clínica Integral de Obesidad, Hospital General Tláhuac, Secretaría de Salud de la CDMX, Av. La turba 655, Mexico City, Tláhuac, 13278, Mexico
| | - Angélica Martínez-Hernández
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
| | - Federico Centeno
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
| | - Lorena Orozco
- Immunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Periférico Sur 4809, Mexico City, Tlalpan, 14610, Mexico
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Hierons SJ, Abbas K, Sobczak AIS, Cerone M, Smith TK, Ajjan RA, Stewart AJ. Changes in plasma free fatty acids in obese patients before and after bariatric surgery highlight alterations in lipid metabolism. Sci Rep 2022; 12:15337. [PMID: 36097032 PMCID: PMC9468139 DOI: 10.1038/s41598-022-19657-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
Obesity is a complex disease that increases an individual’s risk of developing other diseases and health-related problems. A common feature is dyslipidemia characterized by increased levels of plasma lipids, which include non-esterified fatty acids (NEFAs). The role of NEFAs in obesity-related morbidity is interesting as NEFAs constitute a reservoir of metabolic energy, are principal components of cell membranes and are precursors for signalling molecules. Bariatric surgery promotes sustained weight loss in severely obese patients, reducing the incidence and severity of co-morbidities. In this study we measure changes in circulating NEFA species in plasma samples taken from 25 obese individuals before and 9 months after Roux-en-Y gastric bypass surgery. The mean weight of the cohort reduced by 29.2% from 149.0 ± 25.1 kg pre-surgery to 105.5 ± 19.8 kg post-surgery and the BMI by 28.2% from 51.8 ± 6.3 kg/m2 pre-surgery to 37.2 ± 5.4 kg/m2. Mean glycated haemoglobin (HbA1c) reduced from 6.5 ± 1.3 to 5.5 ± 0.5%, consistent with the intervention leading to improved glycaemic control, particularly in those who were dysglycemic prior to surgery. Total and LDL cholesterol concentrations were markedly reduced following surgery. Concentrations of seven NEFAs were found to decrease 9 months after surgery compared to pre-surgery levels: myristate, palmitoleate, palmitate, linoleate, oleate, stearate and arachidonate. Bariatric surgery led to increased lipogenesis and elongase activity and decreased stearoyl-CoA desaturase 1 activity. This study therefore highlights metabolic changes that take place following gastric bypass surgery in severely obese patients.
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Affiliation(s)
- Stephen J Hierons
- School of Medicine, University of St Andrews, St Andrews, KY16 9TF, UK
| | - Kazim Abbas
- Renal Transplant Unit, Manchester Royal Infirmary, Manchester, UK
| | | | - Michela Cerone
- Biomedical Sciences Research Complex, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Terry K Smith
- Biomedical Sciences Research Complex, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Ramzi A Ajjan
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Alan J Stewart
- School of Medicine, University of St Andrews, St Andrews, KY16 9TF, UK.
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