Leptin is an adipocyte-derived hormone that can be thought of as a signal from adipose
tissue to the rest of the body conveying information about long-term nutritional status.
Patients with the very rare condition of generalized lipodystrophy have leptin deficiency
secondary to lack of adipose tissue. The combination of leptin deficiency and ectopic
lipid deposition in patients with lipodystrophy leads to metabolic complications
including severe insulin resistance and diabetes, hypertriglyceridemia, nonalcoholic
steatohepatitis, and polycystic ovarian syndrome. Between 2000 and 2014, the NIDDK IRP
conducted an open-label clinical trial of the recombinant human leptin analog,
metreleptin, in patients with generalized and partial forms of lipodystrophy. This study
showed that metreleptin ameliorates metabolic and endocrine abnormalities in
lipodystrophy, including reducing food intake, improving insulin resistance and diabetes,
reducing ectopic lipid, and normalizing reproduction. Based on these data, metreleptin
was approved by the FDA in February, 2014, for patients with generalized, but not
partial, lipodystrophy.
Currently, metreleptin is not available as an approved drug outside the US and Japan, and
it is available on a compassionate use basis only in a few additional countries. The
purpose of this study is twofold:
To provide access to metreleptin to patients with generalized lipodystrophy,
including those who have previously received metreleptin through NIH studies
(protocols 02-DK-0022 and 13-DK- 0057) AND/OR who cannot obtain metreleptin through
approved or compassionate use mechanisms in their home country
To continue to collect data on the long-term efficacy of metreleptin in ameliorating
the metabolic complications of generalized lipodystrophy.
Metreleptin will be given at doses of less than or equal to 0.24 mg/kg/day, adjusted
based on body weight and metabolic control. Patients will be seen approximately once per
year at NIH for evaluation, and potentially less frequently for those who are medically
stable and have difficulty traveling to the US. Laboratory evaluation will be obtained
more frequently by the patient s home providers as clinically indicated. The primary
outcomes of the study are improvements in serum triglycerides and hemoglobin A1c levels.
Secondary outcomes include measures of steatohepatitis and ectopic lipid, body
composition, bone mineral density and bone mineral metabolism, and pituitary and
reproductive function.
Metreleptin is supplied by Chiesi USA, Inc.. Neither the NIH nor Chiesi USA, Inc. can
guarantee that leptin will be available for these patients indefinitely and/or after the
study ends.