We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of Bimagrumab vs Placebo on Body Fat Mass Among Adults With Type 2 Diabetes and Obesity: A Phase 2 Randomized Clinical Trial.
- Authors
Heymsfield, Steven B.; Coleman, Laura A.; Miller, Ram; Rooks, Daniel S.; Laurent, Didier; Petricoul, Olivier; Praestgaard, Jens; Swan, Therese; Wade, Thomas; Perry, Robert G.; Goodpaster, Bret H.; Roubenoff, Ronenn
- Abstract
Key Points: Question: What are the effects of bimagrumab, an antibody that blocks activin type II receptors and stimulates skeletal muscle growth, on total body fat mass and glycemic control in patients with type 2 diabetes and excess adiposity? Findings: In this phase 2 randomized clinical trial of 75 patients with type 2 diabetes and body mass index between 28 and 40 who received bimagrumab or placebo during 48 weeks along with diet and exercise counseling, those who received bimagrumab had a significantly larger decrease in total body fat mas and glycated hemoglobin and increase in lean mass compared with patients who received placebo. Meaning: These findings suggest that blockade of the activin receptor with bimagrumab could provide a novel pharmacologic approach for managing patients with type 2 diabetes with excess adiposity. This randomized clinical trial evaluates the efficacy and safety of bimagrumab on body composition and glycemic control in adults with type 2 diabetes and overweight or obesity. Importance: Antibody blockade of activin type II receptor (ActRII) signaling stimulates skeletal muscle growth. Previous clinical studies suggest that ActRII inhibition with the monoclonal antibody bimagrumab also promotes excess adipose tissue loss and improves insulin resistance. Objective: To evaluate the efficacy and safety of bimagrumab on body composition and glycemic control in adults with type 2 diabetes and overweight and obesity. Design, Setting, and Participants: This double-masked, placebo-controlled, 48-week, phase 2 randomized clinical trial was conducted among adults with type 2 diabetes, body mass index between 28 and 40, and glycated hemoglobin (HbA1c) levels between 6.5% and 10.0% at 9 US and UK sites. The trial was conducted from February 2017 to May 2019. Only participants who completed a full treatment regimen were included in analysis. Interventions: Patients were randomized to intravenous infusion of bimagrumab (10 mg/kg up to 1200 mg in 5% dextrose solution) or placebo (5% dextrose solution) treatment every 4 weeks for 48 weeks; both groups received diet and exercise counseling. Main Outcomes and Measures: The primary end point was least square mean change from baseline to week 48 in total body fat mass (FM); secondary and exploratory end points were lean mass (LM), waist circumference (WC), HbA1c level, and body weight (BW) changes from baseline to week 48. Results: A total of 75 patients were randomized to bimagrumab (n = 37; 23 [62.2%] women) or placebo (n = 38; 12 [31.6%] women); 58 (77.3%) completed the 48-week study. Patients at baseline had a mean (SD) age of 60.4 (7.7) years; mean (SD) BMI of 32.9 (3.4); mean (SD) BW of 93.6 (14.9) kg; mean (SD) FM of 35.4 (7.5) kg; and mean (SD) HbA1c level of 7.8% (1.0%). Changes at week 48 for bimagrumab vs placebo were as follows: FM, −20.5% (−7.5 kg [80% CI, −8.3 to −6.6 kg]) vs −0.5% (−0.18 kg [80% CI, −0.99 to 0.63 kg]) (P <.001); LM, 3.6% (1.70 kg [80% CI, 1.1 to 2.3 kg]) vs −0.8% (−0.4 kg [80% CI, −1.0 to 0.1 kg]) (P <.001); WC, −9.0 cm (80% CI, −10.3 to −7.7 cm) vs 0.5 cm (80% CI, −0.8 to 1.7 cm) (P <.001); HbA1c level, −0.76 percentage points (80% CI, −1.05 to −0.48 percentage points) vs −0.04 percentage points (80% CI, −0.23 to 0.31 percentage points) (P =.005); and BW, −6.5% (−5.9 kg [80% CI, −7.1 to −4.7 kg]) vs −0.8% (−0.8 kg [80% CI, −1.9 to 0.3 kg]) (P <.001). Bimagrumab's safety and tolerability profile was consistent with prior studies. Conclusions and Relevance: In this phase 2 randomized clinical trial, ActRII blockade with bimagrumab led to significant loss of FM, gain in LM, and metabolic improvements during 48 weeks in patients with overweight or obesity who had type 2 diabetes. ActRII pathway inhibition may provide a novel approach for the pharmacologic management of excess adiposity and accompanying metabolic disturbances. Trial Registration: ClinicalTrials.gov number: NCT03005288
- Subjects
ADIPOSE tissues; MONOCLONAL antibodies; TYPE 2 diabetes; OBESITY; PLACEBOS; RANDOMIZED controlled trials; ADULTS
- Publication
JAMA Network Open, 2021, Vol 4, Issue 1, pe2033457
- ISSN
2574-3805
- Publication type
Article
- DOI
10.1001/jamanetworkopen.2020.33457