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A Study to Learn About Safety and Effects of Once-weekly Treatment With Berobenatide in Adults With Obesity Disease in Japan (VESPER-JW)

A PHASE 3, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY TO ASSESS THE EFFICACY AND SAFETY OF ONCE-WEEKLY BEROBENATIDE IN ADULTS WITH OBESITY DISEASE IN JAPAN (VESPER-JW)

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07794761
Enrollment
180
Registered
2026-08-31
Start date
2026-09-28
Completion date
2029-03-14
Last updated
2026-09-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obesity

Keywords

obesity, overweight, obesity disease

Brief summary

The purpose of this clinical study is to learn about safety and effects of berobenatide (PF-08653944) in adults with obesity disease, a condition where a person has too much body fat, which can harm their health and increase the risk of other medical problems. Some people in this study may also have type 2 diabetes, a condition in which the body does not use insulin properly, causing blood sugar levels to become too high. This study is seeking participants in Japan who: * Have obesity disease. * May have type 2 diabetes. * Meet the study-specific age, weight and health requirements. About 180 adults will take part in this study. Participants will be randomly assigned to receive either berobenatide or a placebo. A placebo looks like the study medicine but does not contain any active medicine. Berobenatide or placebo will be given as an injection under the skin of the abdomen (belly area). The study will compare the experiences of people receiving berobenatide with those receiving placebo to determine whether berobenatide can help people lose weight. The study will also assess the safety of berobenatide and its effects on body weight and other health measures. People will take part in this study for about 22 months. During this time, they will have about 15 study visits at the site. They will also have 2 study visits over the phone.

Interventions

Solution for injection

OTHERPlacebo

Solution for injection

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Aged ≥18 years. * BMI of: ≥27.0 kg/m2 to \<35.0 kg/m2 with ≥2 obesity-related health disorders or BMI of ≥35.0 kg/m2 with ≥1 obesity-related health disorder. The participant must have at least one of either hypertension, dyslipidemia or glucose intolerance (T2D and impaired glucose tolerance etc.) as an obesity-related health disorder.

Exclusion criteria

* Have a self-reported body weight change greater than 5% within 90 days prior to Screening. * Diagnosis of type 1 diabetes or any other form of diabetes other than T2D. * History of acute or chronic pancreatitis. * Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia type 2 (MEN-2).

Design outcomes

Primary

MeasureTime frame
Percent change from baseline in body weightBaseline, Week 72

Secondary

MeasureTime frame
Change from baseline in waist circumferenceBaseline, Week 72
Percentage of Participants achieving ≥10% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥15% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥20% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥5% of body weight reduction from baselineBaseline, Week 72
Change from baseline in body weightBaseline, Week 72
Change from baseline in Systolic Blood Pressure (SBP)Baseline, Week 72
Change from baseline in Diastolic Blood Pressure (DBP)Baseline, Week 72
Change from baseline in Impact of Weight on Quality of Life-Lite-Clinical Trial (IWQoL-Lite-CT) Physical Function composite scoreBaseline, Week 72
Change from baseline in IWQoL-Lite-CT total scoreBaseline, Week 72
Change from baseline in IWQoL-Lite-CT Physical composite scoreBaseline, Week 72
Change from baseline in IWQoL-Lite-CT Psychosocial composite scoreBaseline, Week 72
Change from Baseline in Fasting Plasma GlucoseBaseline, Week 72
Change from Baseline in Fasting InsulinBaseline, Week 72
Change from Baseline in revised Homeostatic Model Assessment insulin sensitivity as a percentage of normal (HOMA2-%S)Baseline, Week 72
Change from Baseline in revised Homeostatic Model Assessment beta-cell function as a percentage of a normal reference population (HOMA2-%B)Baseline, Week 72
Change from Baseline in HbA1cBaseline, Week 72
Change from baseline in Fasting Total CholesterolBaseline, Week 72
Change from baseline in Fasting Low-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting Very low-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting Non-High-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting High-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting triglyceridesBaseline, Week 72
Change from baseline in high-sensitivity C-reactive proteinBaseline, Week 72
Change from baseline in interleukin-6Baseline, Week 72
Change from baseline in interleukin-1 betaBaseline, Week 72
Number of Participants with Treatment Emergent Adverse Events (TEAEs)Baseline, Week 72
Number of Participants with Serious Adverse Events (SAEs)Baseline, Week 72
Number of Participants with adverse events leading to discontinuationBaseline, Week 72
Number of Participants with Adverse Events of Special Interest (AESIs)Baseline, Week 72
Number of participants with absolute and change from baseline in laboratory measurementsBaseline, Week 72
Change from baseline in visceral fat areaBaseline, Week 72
Percentage of participants achieving the conversion to normoglycemiaBaseline, Week 72
Change from Baseline in Oral Glucose Tolerance Test (OGTT) 2hBaseline, Week 72
Percentage of participants achieving conversion from HbA1c ≥7% to HbA1c <7%Baseline, Week 72
Percentage of participants achieving conversion from >6.5% to HbA1c ≤6.5%Baseline, Week 72
Percentage of participants achieving conversion from HbA1c ≥5.7% to HbA1c <5.7%Baseline, Week 72

Countries

Japan

Contacts

CONTACTPfizer CT.gov Call Center
ClinicalTrials.gov_Inquiries@pfizer.com1-800-718-1021
STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 5, 2026