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Arq. bras. endocrinol. metab ; 51(1): 34-41, fev. 2007. ilus
Article in Portuguese | LILACS | ID: lil-448361

ABSTRACT

Diversas alterações endócrinas são descritas na obesidade. O eixo corticotrófico encontra-se hiper-responsivo, com maior depuração dos hormônios e nível de cortisol normal. A caracterização do pseudo-Cushing é importante. A leptina parece ser um hormônio permissivo para o desencadeamento da puberdade. Em adultos, as gonadotrofinas são normais, hiperandrogenismo e hiperestrogenismo são encontrados. Nas mulheres, a resistência insulínica é central no desenvolvimento da síndrome dos ovários policísticos (SOP), associada a hiperandrogenemia ovariana. Nos obesos, GH geralmente é baixo e IGF1 normal. A função tireoidiana é habitualmente normal nos obesos.


Several endocrine changes have been described in the obesity state. The corticotropic axis is hyperresponsive and there is enhancement of hormonal clearance, but cortisol levels are within the normal range. It is important to characterize a pseudo-Cushing in obesity. Leptin seems to be a permissive hormone for the beginning of puberty. In adults, gonadotropines are normal, and hyperandrogenism and hyperestrogenism are found. In women, insulin resistance has a central role in polycystic ovarian syndrome (POS), which is associated to ovarian hyperandrogenemia. In obese subjects, growth hormone (GH) is generally low and IGF1 is normal. Thyroid function is commonly normal in obese subjects.


Subject(s)
Humans , Endocrine Glands/metabolism , Hormones/metabolism , Hypothalamo-Hypophyseal System/metabolism , Obesity/metabolism , Obesity/physiopathology , Adrenocorticotropic Hormone/metabolism , Gonadotropins, Pituitary/metabolism , Growth Hormone/metabolism , Insulin Resistance/physiology , Leptin/metabolism , Thyrotropin/metabolism
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