Effect of weight loss after bariatric surgery on thyroid-stimulating hormone levels in euthyroid patients with morbid obesity
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Identificadores
URI: http://hdl.handle.net/20.500.11940/16053
PMID: 31137484
DOI: 10.3390/nu11051121
ISSN: 2072-6643
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Fecha de publicación
2019Título de revista
Nutrients
Tipo de contenido
Artigo
DeCS
resultado del tratamiento | tirotropina | estudios retrospectivos | glándula tiroides | obesidad | mediana edad | pérdida de peso | humanos | factores de tiempo | adulto | índice de masa corporal | cirugía bariátricaMeSH
Weight Loss | Bariatric Surgery | Adult | Thyroid Gland | Middle Aged | Humans | Treatment Outcome | Time Factors | Obesity | Body Mass Index | Thyrotropin | Retrospective StudiesResumen
Obesity is associated with several endocrine abnormalities, including thyroid dysfunction. The objective of this study was to investigate the effect of weight loss after bariatric surgery on thyroid-stimulating hormone (TSH) levels in euthyroid patients with morbid obesity. We performed an observational study, evaluating patients with morbid obesity submitted to bariatric surgery. We included 129 patients (92 women) and 31 controls (21 women). Clinical, anthropometric, biochemical, and hormonal parameters were evaluated. The primary endpoint was circulating TSH (microU/mL). Fasting TSH levels were higher in the obese group (3.3 +/- 0.2) than in the control group (2.1 +/- 0.2). The mean excessive body mass index (BMI) loss (EBMIL) 12 months after bariatric surgery was 72.7 +/- 2.1%. TSH levels significantly decreased in the obese patients after surgery; 3.3 +/- 0.2 vs. 2.1 +/- 0.2 before and 12 months after surgery, respectively. Free thyroxine (T4) (ng/dL) levels significantly decreased in the obese patients after surgery; 1.47 +/- 0.02 vs. 1.12 +/- 0.02 before and 12 months after surgery, respectively. TSH decreased significantly over time, and the decrement was associated with the EBMIL. In euthyroid patients with morbid obesity, weight loss induced by bariatric surgery promotes a significant decline of the increased TSH levels. This decrement of TSH is progressive over time after surgery and significantly associated with excess BMI loss.
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