Human IL6 enhances leptin action in mice.
Diabetologia
; 53(3): 525-35, 2010 Mar.
Article
em En
| MEDLINE
| ID: mdl-19902173
ABSTRACT
AIMS/HYPOTHESIS:
Interleukin-6 is an inflammatory cytokine with pleiotropic effects upon nutrient homeostasis. Many reports show that circulating IL6 correlates with obesity and contributes to insulin resistance; however, IL6 can promote energy expenditure that improves glucose homeostasis.METHODS:
We investigated nutrient homeostasis in C57BL/6J mice with sustained circulating human IL6 (hIL6) secreted predominantly from brain and lung (hIL6(tg) mice).RESULTS:
The hIL6(tg) mice displayed no features of systemic inflammation and were more insulin-sensitive than wild-type mice. On a high-fat diet, hIL6(tg) mice were lean, had low leptin concentrations, consumed less food and expended more energy than wild-type mice. Like ob/ob mice, the ob/ob (IL6) mice (generated by intercrossing ob/ob and hIL6(tg) mice) were obese and glucose-intolerant. However, low-dose leptin injections increased physical activity and reduced both body weight and food intake in ob/ob (IL6) mice, but was ineffective in ob/ob mice. Leptin increased hypothalamic signal transducer and activator of transcription-3 phosphorylation in ob/ob (IL6) mice, whereas ob/ob mice barely responded. CONCLUSIONS/INTERPRETATION:
Human IL6 enhanced central leptin action in mice, promoting nutrient homeostasis and preventing diet-induced obesity.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Interleucina-6
/
Leptina
/
Obesidade
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article