K Alexander Iwen1, Erich Schröder1, Georg Brabant2. 1. Medizinische Klinik I, Experimentelle und Klinische Endokrinologie, Universität zu Lübeck, Lübeck, Germany. 2. Medizinische Klinik I, Experimentelle und Klinische Endokrinologie, Universität zu Lübeck, Lübeck, Germany ; Department of Endocrinology, The Christie Manchester Academic Health Science Centre, Manchester, UK.
Abstract
BACKGROUND: Clustering of various metabolic parameters including abdominal obesity, hyperglycaemia, low high-density lipoprotein cholesterol, elevated triglycerides and hypertension have been used worldwide as metabolic syndrome to predict cardiometabolic risk. Thyroid dysfunction impacts on various levels of these components. OBJECTIVES: The purpose of the present review is to summarize available data on thyroid hormone-dependent action on components of the metabolic syndrome. METHODS: A PubMed search for any combination of hyperthyroidism, thyrotoxicosis or hypothyroidism and metabolic syndrome, blood pressure, hypertension, hyperlipidaemia, cholesterol, high-density lipoprotein cholesterol, glucose, diabetes mellitus, body weight or visceral fat was performed. We included papers and reviews published between 2000 and today but accepted also frequently cited papers before 2000. RESULTS: There is convincing evidence for a major impact of thyroid function on all components of the metabolic syndrome, reflecting profound alterations of energy homeostasis at many levels. CONCLUSION: Even though the interactions shown in animal models and man are complex, it is evident that insulin sensitivity is highest and adverse thyroid effects on the metabolic system are lowest in euthyroid conditions.
BACKGROUND: Clustering of various metabolic parameters including abdominal obesity, hyperglycaemia, low high-density lipoprotein cholesterol, elevated triglycerides and hypertension have been used worldwide as metabolic syndrome to predict cardiometabolic risk. Thyroid dysfunction impacts on various levels of these components. OBJECTIVES: The purpose of the present review is to summarize available data on thyroid hormone-dependent action on components of the metabolic syndrome. METHODS: A PubMed search for any combination of hyperthyroidism, thyrotoxicosis or hypothyroidism and metabolic syndrome, blood pressure, hypertension, hyperlipidaemia, cholesterol, high-density lipoprotein cholesterol, glucose, diabetes mellitus, body weight or visceral fat was performed. We included papers and reviews published between 2000 and today but accepted also frequently cited papers before 2000. RESULTS: There is convincing evidence for a major impact of thyroid function on all components of the metabolic syndrome, reflecting profound alterations of energy homeostasis at many levels. CONCLUSION: Even though the interactions shown in animal models and man are complex, it is evident that insulin sensitivity is highest and adverse thyroid effects on the metabolic system are lowest in euthyroid conditions.
Entities:
Keywords:
Arterial hypertension; Dyslipoproteinaemia; Energy homeostasis; Insulin resistance; Metabolic syndrome; Mitochondria; Obesity; Thyroid function
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