Metabolic disturbances linked to obesity: the role of impaired tissue perfusion.
Associated with elevated risk of cardiovascular events and cancer, obesity is a worldwide problem affecting developed and developing countries. Microcirculatory vessels, represented by arterioles, capillaries and venules (mean internal diameter < 100 microm), are the place where blood/tissue nutrition and exchange effectively take place. Microvascular dysfunction is an early event in obesity probably secondary to endothelial dysfunction and capillaries rarefaction. New research techniques allow the investigation of the microcirculation in different vascular beds in humans. Studies suggest a link between endothelial dysfunction and visceral obesity. Oxidative stress, inflammation and renin-angiotensin system are among factors considered to be involved on microvascular dysfunction in obesity. Microcirculatory impairment present in obesity suggests that it could be an important causal factor in obesity-related disorders such as insulin resistance and hypertension.
Villela
Nivaldo Ribeiro
NR
Laboratório de Pesquisas Clínicas e Experimentais em Biologia Vascular, Centro Biomédico, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Rio de Janeiro, RJ, Brazil.
Kramer-Aguiar
Luiz Guilherme
LG
Bottino
Daniel Alexandre
DA
Wiernsperger
Nicolas
N
Bouskela
Eliete
E
D000273:Adipose Tissue; D000818:Animals; D002318:Cardiovascular Diseases / Q000209:etiology; D004730:Endothelium, Vascular / Q000503:physiopathology; D006801:Humans; D006973:Hypertension / Q000209:etiology; D007333:Insulin Resistance / Q000502:physiology*; D008833:Microcirculation / Q000502:physiology*; D009765:Obesity / Q000150:complications / Q000378:metabolism / Q000503:physiopathology*; D018384:Oxidative Stress / Q000502:physiology; D051381:Rats; D012039:Regional Blood Flow / Q000502:physiology; D014655:Vascular Resistance / Q000502:physiology