Omentin-1 levels are reduced by pharmacologic doses of leptin, but remain unaffected by energy deprivation and display no day-night variation

O. P R Hamnvik, B. Thakkar, J. Chamberland, K. Aronis, B. Schneider, C. S. Mantzoros

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

OBJECTIVE: To study the day-night variation of omentin-1 levels and assess whether leptin and/or short- and long-term energy deprivation alter circulating omentin-1 levels via cytokines. DESIGN AND METHODS: Omentin-1 levels were measured hourly in serum samples from six healthy men to evaluate for day-night variation. To study effects of acute energy deprivation and of leptin administration, eight healthy subjects were studied in the fasting state for 72 h with administration of either placebo or metreleptin (recombinant human leptin) in physiologic replacement doses. We evaluated the effect of leptin in pharmacologic doses on serum omentin-1 and cytokine levels, as well as on omentin-1 levels in ex vivo omental adipose tissue, in 15 healthy volunteers. To study the effect of chronic energy deprivation and weight loss on omentin-1 levels, we followed 18 obese subjects for 12 months who underwent bariatric surgery. RESULTS: There is no day-night variation in omentin-1 levels. Short-term and chronic energy deprivation, as well as ex vivo leptin administration and physiologic replacement doses of leptin, do not alter omentin-1 levels; pharmacologic doses of metreleptin reduce omentin-1 levels, whereas levels of tumor necrosis factor-α receptor II and interleukin-6 tend to increase. CONCLUSIONS: Omentin-1 levels are reduced by pharmacologic doses of metreleptin independent of effects on cytokine levels.

Original languageEnglish (US)
Pages (from-to)260-264
Number of pages5
JournalInternational Journal of Obesity
Volume39
Issue number2
DOIs
StatePublished - Feb 11 2015

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Fingerprint Dive into the research topics of 'Omentin-1 levels are reduced by pharmacologic doses of leptin, but remain unaffected by energy deprivation and display no day-night variation'. Together they form a unique fingerprint.

  • Cite this