Meta-Analyses of Phase 3 Trials Show Obese and Overweight Patients Taking Arena Pharmaceuticals' Lorcaserin Achieved Statistically Significant Weight Loss
At one year, using Modified Intent-to-Treat with Last Observation Carried Forward analysis (MITT-LOCF) of the integrated results, 46.3% of lorcaserin 10 mg twice daily (BID) patients and 40.6% of lorcaserin 10 mg once daily (QD) patients achieved at least 5% weight loss, compared to 22.1% of patients on placebo, and 22.0% of lorcaserin 10 mg BID patients and 17.3% of lorcaserin 10 mg QD patients achieved at least 10% weight loss, compared to 8.3% of patients on placebo. Of the patients completing year one of the trials, 62.3% of lorcaserin 10 mg BID patients and 52.8% of lorcaserin 10 mg QD patients achieved at least 5% weight loss, compared to 32.0% of patients on placebo, and 33.5% of lorcaserin 10 mg BID patients and 25.5% of lorcaserin 10 mg QD patients achieved at least 10% weight loss, compared to 13.8% of patients on placebo. Notably, this meta-analysis included approximately 600 patients enrolled with type 2 diabetes, a disease that typically makes weight loss more difficult to achieve.
Changes in secondary endpoints of cardiovascular and metabolic risk were assessed in the Phase 3 program. Body Mass Index (BMI), waist circumference, triglycerides, total cholesterol, LDL cholesterol, HDL cholesterol, systolic blood pressure, diastolic blood pressure, heart rate and quality of life were measured in all three trials in the Phase 3 program, and the integrated Year 1 results showed favorable statistically significant effects with lorcaserin 10 mg BID treatment compared to placebo. Lorcaserin did not increase heart rate or blood pressure; changes from baseline for patients who took lorcaserin 10 mg BID, lorcaserin 10 mg QD or placebo, respectively, were as follows: systolic blood pressure (mmHg), (-0.9, -0.2, -0.2); diastolic blood pressure (mmHg), (-1.4, -0.5, -0.8); and heart rate (bpm), (-1.0, -0.5, -0.2).
The most frequent lorcaserin-associated adverse events included headache, nausea, dizziness, fatigue and dry mouth. Headache was the only adverse event with an incidence that exceeded the placebo group by greater than 5%. In each trial, echocardiograms were performed at baseline and every six months to measure heart valve regurgitation. In the meta-analysis of the three trials, the proportion of patients who developed
"There is a significant unmet need for effective treatment options that can help patients reduce their weight and improve their health in a well-tolerated manner," said
The three lorcaserin Phase 3 trials randomized a total of 7,794 patients, and 7,500 patients were included in the primary efficacy analyses (MITT-LOCF), which required a patient to have taken at least one dose of study medication and have had at least one weight measurement subsequent to baseline. The MITT-LOCF analyses included 3,349 lorcaserin 10 mg BID patients, 865 lorcaserin 10 mg QD patients and 3,286 placebo patients. Patients had an average BMI, baseline weight and age of approximately 36 kg/m2, 100 kg and 45 years, respectively; approximately 80% of patients were female.
Lorcaserin is an investigational drug candidate intended for weight management, including weight loss and maintenance of weight loss, in patients who are obese (BMI >30) or patients who are overweight (BMI >27) and have at least one weight-related co-morbid condition. Lorcaserin is a new chemical entity that is believed to act as a selective serotonin 2C receptor agonist. The serotonin 2C receptor is expressed in the brain, including the hypothalamus, an area believed to be involved in the control of appetite and metabolism. Arena has patents that cover lorcaserin in
Arena submitted a New Drug Application (NDA) for lorcaserin to the
Lorcaserin Phase 3 Clinical Trial Program Overview
The lorcaserin Phase 3 clinical trial program consists of three double-blind, randomized, placebo-controlled trials, BLOOM (Behavioral modification and Lorcaserin for Overweight and Obesity Management), BLOSSOM (Behavioral modification and LOrcaserin Second Study for Obesity Management) and BLOOM-DM (Behavioral modification and Lorcaserin for Overweight and Obesity Management in Diabetes Mellitus), and enrolled approximately 7,800 patients. BLOOM and BLOSSOM evaluated lorcaserin versus placebo in patients who are obese or patients who are overweight and have at least one weight-related co-morbid condition. BLOOM evaluated 3,182 patients over a two-year treatment period, and BLOSSOM evaluated 4,008 patients over a one-year treatment period. BLOOM-DM evaluated 604 obese and overweight patients with type 2 diabetes over a one-year treatment period. The trials included a standardized program of moderate diet and exercise guidance.
Arena is a clinical-stage biopharmaceutical company focused on discovering, developing and commercializing oral drugs that target G protein-coupled receptors, an important class of validated drug targets, in four major therapeutic areas: cardiovascular, central nervous system, inflammatory and metabolic diseases. Arena's most advanced drug candidate, lorcaserin, is intended for weight management. Arena's wholly owned subsidiary,
Arena Pharmaceuticals® and Arena® are registered service marks of the company.
Certain statements in this press release are forward-looking statements that involve a number of risks and uncertainties. Such forward-looking statements include statements about the advancement, therapeutic indication and use, safety, efficacy, tolerability, mechanism of action and potential of lorcaserin; the significance of biomarkers; the submission of a Marketing Authorization Application for regulatory approval of lorcaserin; the response to the CRL for the lorcaserin NDA, including related plans and activities; the Eisai collaboration and potential activities thereunder; lorcaserin's patent coverage; and Arena's focus, goals, strategy, research and development programs, and ability to develop compounds and commercialize drugs. For such statements, Arena claims the protection of the Private Securities Litigation Reform Act of 1995. Actual events or results may differ materially
from Arena's expectations. Factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to, the following: the timing of regulatory review and approval is uncertain; the risk that data and other information related to Arena's research and development programs, including for lorcaserin, may not meet safety or efficacy requirements or otherwise be sufficient for regulatory approval; Arena's response to the CRL for the lorcaserin NDA or submission of a Marketing Authorization Application for regulatory approval of lorcaserin may not be submitted when anticipated, if at all; the
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