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Effects of Metreleptin in Pediatric Patients With Lipodystrophy.

ABSTRACT: Lipodystrophy syndromes are rare disorders of deficient adipose tissue. Metreleptin, a human analog of leptin, improved metabolic abnormalities in mixed cohorts of children and adults with lipodystrophy and low leptin.Determine effects of metreleptin on diabetes, hyperlipidemia, nonalcoholic fatty liver disease (NAFLD), growth, and puberty in pediatric patients with lipodystrophy and low leptin.Prospective, single-arm, open-label studies with continuous enrollment since 2000.National Institutes of Health, Bethesda, Maryland.Fifty-three patients aged 6 months to <18 years with lipodystrophy, leptin level <8 ng/mL (male patients) or <12 ng/mL (female patients), and ?1 metabolic abnormality (diabetes, insulin resistance, or hypertriglyceridemia).Subcutaneous metreleptin injections (0.04 to 0.19 mg/kg/d).Change in A1c, lipid, and transaminase levels after a mean ± standard deviation (SD) of 12 ± 0.2 months and 61 ± 39 months. Changes in liver histology, growth, and pubertal development throughout treatment.After 12 months, the A1c level (mean ± SD) decreased from 8.3% ± 2.4% to 6.5% ± 1.8%, and median triglyceride level decreased from 374 mg/dL [geometric mean (25th,75th percentile), 190, 1065] to 189 mg/dL (112, 334; P < 0.0001), despite decreased glucose- and lipid-lowering medications. The median [geometric mean (25th,75th percentile)] alanine aminotransferase level decreased from 73 U/L (45, 126) to 41 U/L (25, 59; P = 0.001), and that of aspartate aminotransferase decreased from 51 U/L (29, 90) to 26 U/L (18, 42; P = 0.0002). These improvements were maintained over long-term treatment. In 17 patients who underwent paired biopsies, the NAFLD activity score (mean ± SD) decreased from 4.5 ± 2.0 to 3.4 ± 2.0 after 3.3 ± 3.2 years of metreleptin therapy (P = 0.03). There were no clinically significant changes in growth or puberty.Metreleptin lowered A1c and triglyceride levels, and improved biomarkers of NAFLD in pediatric patients with lipodystrophy. These improvements are likely to reduce the lifetime burden of disease.

SUBMITTER: Brown RJ

PROVIDER: S-EPMC5443330 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Effects of Metreleptin in Pediatric Patients With Lipodystrophy.

Brown Rebecca J RJ Meehan Cristina Adelia CA Cochran Elaine E Rother Kristina I KI Kleiner David E DE Walter Mary M Gorden Phillip P

The Journal of clinical endocrinology and metabolism 20170501 5

<h4>Context</h4>Lipodystrophy syndromes are rare disorders of deficient adipose tissue. Metreleptin, a human analog of leptin, improved metabolic abnormalities in mixed cohorts of children and adults with lipodystrophy and low leptin.<h4>Objective</h4>Determine effects of metreleptin on diabetes, hyperlipidemia, nonalcoholic fatty liver disease (NAFLD), growth, and puberty in pediatric patients with lipodystrophy and low leptin.<h4>Design</h4>Prospective, single-arm, open-label studies with cont ...[more]

PMID: 28324110

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Project description:ObjectiveTo evaluate the long-term clinical effect of treatment with metreleptin (an analogue of human leptin) on glycemic and lipid abnormalities and markers of hepatic steatosis in patients with inherited or acquired lipodystrophy.MethodsFifty-five patients (36 with generalized lipodystrophy and 19 with partial lipodystrophy) with at least 1 of 3 metabolic abnormalities (diabetes mellitus, fasting triglyceride level ≥200 mg/dL, and insulin resistance) and low leptin levels received subcutaneous injections of metreleptin once or twice daily in an ongoing clinical trial at the National Institutes of Health.ResultsAt baseline, hemoglobin A1c-8.5% ± 2.1% (mean ± standard deviation [SD])-and triglycerides-479 ± 80 mg/dL (geometric mean ± standard error [SE])-were substantially elevated. Robust and sustained reductions in both variables were evident for the observed patient population during a 3-year metreleptin treatment period (-2.1% ± 0.5% [mean ± SE] and -35.4% ± 13.7% [mean ± SE], respectively). Mean alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels were elevated at baseline (100 ± 120 U/L and 71 ± 77 U/L [mean ± SD], respectively) and decreased by -45 ± 19 U/L and -33 ± 14 U/L (mean ± SE), respectively, during the 3-year metreleptin treatment period. Improvements in hemoglobin A1c, triglycerides, ALT, and AST were more pronounced in the subsets of patients having elevated levels at baseline. The most notable adverse events observed in this patient population were likely attributable to underlying metabolic abnormalities or comorbidities.ConclusionMetreleptin treatment substantially reduced glycemic variables, triglycerides, and liver enzymes (ALT and AST) and demonstrated durability of response throughout a 3-year treatment period. These results support metreleptin as a potential treatment for certain metabolic disorders (for example, diabetes mellitus and hypertriglyceridemia) associated with lipodystrophy.

Project description:OBJECTIVE:Recombinant human leptin (metreleptin) improves glycaemia and hypertriglyceridaemia in patients with generalized lipodystrophy; antibody development with in vitro neutralizing activity has been reported. We aimed to characterize antimetreleptin antibody development, including in vitro neutralizing activity. DESIGN:Two randomized controlled studies in patients with obesity (twice-daily metreleptin ± pramlintide for 20-52 weeks; 2006-2009); two long-term, open-label studies in patients with lipodystrophy (once-daily or twice-daily metreleptin for 2 months to 12·3 years; 2000-2014). PATIENTS:A total of 579 metreleptin-treated patients with obesity and 134 metreleptin-treated patients with lipodystrophy (antibody/neutralizing activity data: n = 105). MEASUREMENTS:Antimetreleptin antibodies, in vitro neutralizing activity. RESULTS:Antimetreleptin antibodies developed in most patients (obese: 96-100%; lipodystrophy: 86-92%). Peak antibody titers (approximately 1:125 to 1:3125) generally occurred within 4-6 months and decreased with continued therapy (lipodystrophy). Antibody development did not adversely impact efficacy or safety (patients with obesity), except for inflammatory injection site reactions, but was associated with elevated leptin concentrations. Three patients with obesity developed in vitro neutralizing activity coincident with weight gain. Weight later returned to baseline in one patient despite persistent neutralizing activity. Four patients with generalized lipodystrophy developed in vitro neutralizing activity concurrent with worsened metabolic control; two with confounding comorbidities had sepsis. One patient with lipodystrophy had resolution of neutralizing activity on metreleptin. CONCLUSIONS:Development of in vitro neutralizing activity could be associated with loss of efficacy but has not been consistently associated with adverse clinical consequences. Whether neutralization of endogenous leptin with clinical consequences occurs remains unclear.

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Effects of Metreleptin in Pediatric Patients With Lipodystrophy.

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Effects of Metreleptin in Pediatric Patients With Lipodystrophy.

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