Efficacy and Safety of KAI-9531 Administered Once Weekly Compared With Semaglutide and Placebo in Participants Living With Obesity Who Do Not Have Diabetes

NCT ID: NCT07284979

Last Updated: 2025-12-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE3

Total Enrollment

1200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-12-31

Study Completion Date

2028-04-17

Brief Summary

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The primary objective of this study is to demonstrate that KAI-9531 subcutaneous (SC) injection once weekly is superior to semaglutide SC once weekly and to placebo SC once weekly on percent change in body weight.

Detailed Description

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Conditions

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Obesity

Keywords

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Obesity KAI-9531 Glucagon-like peptide-1 GLP-1 Semaglutide Glucose-dependent Insulinotropic Peptide GIP

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators
The participant and investigator will be blinded for participants randomized to KAI-9531 or placebo until the study is complete. Semaglutide will be provided open-label.

Study Groups

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KAI-9531: Dose 1

Participants will receive Dose 1 of KAI-9531 once weekly.

Group Type EXPERIMENTAL

KAI-9531

Intervention Type DRUG

SC Injection

KAI-9531: Dose 2

Participants will receive Dose 2 of KAI-9531 once weekly.

Group Type EXPERIMENTAL

KAI-9531

Intervention Type DRUG

SC Injection

Semaglutide

Participants will receive semaglutide once weekly.

Group Type ACTIVE_COMPARATOR

Semaglutide

Intervention Type DRUG

SC Injection

Placebo

Participants will receive placebo matched to KAI-9531 once weekly.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

SC Injection

Interventions

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KAI-9531

SC Injection

Intervention Type DRUG

Semaglutide

SC Injection

Intervention Type DRUG

Placebo

SC Injection

Intervention Type DRUG

Other Intervention Names

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Wegovy

Eligibility Criteria

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Inclusion Criteria

* BMI ≥35 kilograms per square meter (kg/m\^2).
* History of at least 1 self-reported unsuccessful effort to lose weight with diet and exercise within the prior 6 months.

Exclusion Criteria

* Current diagnosis or history of diabetes mellitus.
* Started medications within 3 months prior to Screening that may cause significant weight gain, including, but not limited to, tricyclic antidepressants, atypical antipsychotics, and mood stabilizers.
* Unstable weight defined as self-reported change in body weight exceeding 5% within the 3 months prior to Screening.
* Family or personal history of multiple endocrine neoplasia Type 2 or medullary thyroid cancer.
* Uncontrolled hypertension or unstable cardiovascular disease.
* History of chronic or acute pancreatitis.
* Known clinically significant gastric-emptying abnormality or chronic treatment with medications that directly affect gastrointestinal motility.
* History of suicide attempt.
* History of significant active or unstable Major Depressive Disorder (MDD) or other severe psychiatric disorder.
* Received treatment with semaglutide, tirzepatide, glucagon-like peptide-1 receptor (GLP-1R) agonist, GLP-1/glucose-dependent insulinotropic polypeptide (GIP), or glucagon receptor agonist within 3 months prior to Screening.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Kailera

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Central Contacts

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Kailera Therapeutics, Inc.

Role: CONTACT

Phone: 781-317-0291

Email: [email protected]

Other Identifiers

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2025-523511-11-00

Identifier Type: CTIS

Identifier Source: secondary_id

K9531-3107

Identifier Type: -

Identifier Source: org_study_id