Decreased plasma orexin-A levels in obese individuals

J. A. Adam, P. P. C. A. Menheere, F. M. H. van Dielen, P. B. Soeters, W. A. Buurman, J. W. M. Greve

    Research output: Contribution to journalArticleAcademicpeer-review

    118 Citations (Scopus)

    Abstract

    Orexin-A and -B stimulate appetite and food intake in rats. Orexins and orexin receptors are present in the hypothalamus as well as the enteric nervous system, the pancreas and the gut. The presence of orexins in peripheral blood, however, has not yet been reported. To determine whether orexin-A is present in human plasma and is related to body weight, we measured plasma orexin-A and leptin levels in a population with a body mass index (BMI) range from 19.8 to 59 kg/m(2). Plasma orexin-A levels correlated negatively and plasma leptin levels correlated positively with BMI. In obese and morbidly obese individuals, orexin-A levels were significantly lower and leptin levels were significantly higher when compared to normal. Our results support previous data suggesting that orexin-A acts also in a peripheral manner. The fact that lower levels of plasma orexin-A are present in obese individuals suggests that it is involved in the regulation of human energy metabolism
    Original languageEnglish
    Pages (from-to)274-276
    JournalInternational journal of obesity (2005)
    Volume26
    Issue number2
    DOIs
    Publication statusPublished - 2002

    Cite this