The Ob protein (leptin) and the kidney

Kumar Sharma, Robert V. Considine

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Mutation of the Ob gene, which encodes for leptin, or mutation of the leptin receptor leads to obesity in mice. Humans, for the most part, have a positive correlation of leptin with body fat mass suggesting possible defects in leptin effector mechanisms that may contribute to obesity. As patients on hemodialysis have difficulty with appetite, we investigated whether leptin is cleared by the kidney and is elevated in hemodialysis patients. In patients with intact renal function there was a net renal uptake of 12% of circulating leptin, whereas in patients with renal insufficiency there was no renal uptake of leptin. In a separate cohort of 36 patients with end-stage renal disease (ESRD), peripheral leptin levels factored for body mass index was increased by fourfold as compared to a group of healthy controls (N = 338). The leptin receptor exists in a long and short form, with the long form primarily expressed in the hypothalamus but also in the lungs and kidneys of the mouse. Further studies are necessary to clarify the role of leptin in regulating appetite in patients with ESRD and the role of leptin in directly affecting kidney function via its receptors.

Original languageEnglish (US)
Pages (from-to)1483-1487
Number of pages5
JournalKidney international
Volume53
Issue number6
DOIs
StatePublished - 1998

Keywords

  • End stage renal failure
  • Hemodialysis
  • Leptin
  • Obesity
  • Progression of renal disease

ASJC Scopus subject areas

  • Nephrology

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