1. Anti-sRAGE autoimmunity in obesity: Downturn after bariatric surgery is independent of previous diabetic status
- Author
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R. Caiazzo, Eric Boulanger, Pierre Fontaine, Maïté Daroux, M. Lambert, Jean-Baptiste Beuscart, Nicolas Grossin, Rodrigo Lorenzi, Alexandre Patrice, Marie Pigeyre, S. Dubucquoi, and François Pattou
- Subjects
Adult ,Blood Glucose ,Male ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Receptor for Advanced Glycation End Products ,Gastric Bypass ,Down-Regulation ,Proinflammatory cytokine ,Endocrinology ,Weight loss ,Diabetes mellitus ,Internal medicine ,Weight Loss ,Internal Medicine ,medicine ,Humans ,Receptors, Immunologic ,Autoantibodies ,Inflammation ,business.industry ,Autoantibody ,General Medicine ,medicine.disease ,Obesity ,Obesity, Morbid ,Surgery ,Cardiovascular Diseases ,Cohort ,Biomarker (medicine) ,Female ,Blood sugar regulation ,Insulin Resistance ,medicine.symptom ,Lipoproteins, HDL ,business ,Biomarkers ,Diabetic Angiopathies ,Follow-Up Studies - Abstract
Morbid obesity increases the risk of cardiovascular disease (CVD). The receptor for advanced glycation end-products (RAGE) is implicated in proinflammatory processes that underlie CVD. Its soluble form (sRAGE) has been proposed as a vascular biomarker. Recently, anti-sRAGE autoantibodies were described and found to be increased in diseases where RAGE is overexpressed. This study aimed to investigate serum levels of anti-sRAGE autoantibodies in morbidly obese patients.After exclusion based on specific criteria, 150 subjects (50 normoglycemics, 50 glucose-intolerants and 50 diabetics) were randomly recruited from a cohort of 750 obese patients (ABOS). Serum sRAGE and anti-sRAGE autoantibodies were measured before bariatric surgery. Sixty-nine patients were followed for up to 1year after gastric bypass, and their levels of sRAGE and anti-sRAGE autoantibodies measured. The control group consisted of healthy blood donors.Compared with controls, baseline levels of sRAGE and anti-sRAGE autoantibodies were significantly higher in all obese patients independently of glucose regulation (P0.001). At 1year after gastric bypass, sRAGE and anti-sRAGE were decreased (P0.001). The decrease in anti-sRAGE autoantibodies was correlated with an increase in high-density lipoprotein (HDL; P=0.02).Independently of previous diabetic status, morbid obesity increases sRAGE and anti-sRAGE levels. Weight loss after gastric bypass is followed by a decrease in both titres. The decrease in anti-sRAGE correlates with an increase in HDL.
- Published
- 2014
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