Study to Assess KN3835 in the Treatment of Flexible/Semi-Flexible Hammertoe (HMT)

September 10, 2026 updated by: Endo USA Inc., a Keenova Therapeutics Company

A Phase 3, Double-Blind, Randomized, Placebo-Controlled Study to Assess the Efficacy, Safety, and Tolerability of KN3835 vs Placebo in the Treatment of Flexible/Semi-Flexible Hammertoe

The primary purpose of this study is to assess the efficacy, safety, and tolerability of KN3835 compared to placebo in the treatment of flexible/semi-flexible HMT.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
554

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • California
      • Corona, California, United States, 92882
        • Recruiting
        • Keenova Site-009
        • Principal Investigator:
          • Babak Alavynejad
      • Tarzana, California, United States, 91356
        • Recruiting
        • Keenova Site-008
        • Principal Investigator:
          • Fardin Hakakian
    • Florida
      • Pinellas Park, Florida, United States, 33782
        • Recruiting
        • Keenova Site-004
        • Principal Investigator:
          • Jason Levy
      • Sweetwater, Florida, United States, 33172
        • Recruiting
        • Keenova Site-007
        • Principal Investigator:
          • Edward Gonzalez
    • Texas
      • Bedford, Texas, United States, 76021
        • Recruiting
        • Keenova Site-003
        • Principal Investigator:
          • Howard Harris
      • McAllen, Texas, United States, 78501
        • Recruiting
        • Keenova Site-002
        • Principal Investigator:
          • Joseph Caporusso
    • Utah
      • Salt Lake City, Utah, United States, 84107
        • Recruiting
        • Keenova Site-006
        • Principal Investigator:
          • Clark Larsen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Key Inclusion Criteria:

  • Has no significant medical history or examination findings related to the foot to be treated, which in the investigator's opinion, would make the participant unsuitable for study intervention administration or study required evaluations.
  • If female, be of non-childbearing potential or, if of childbearing potential, be non-pregnant, non-lactating and agree to use effective contraception when with a male partner for the duration of the study and for 28 days after treatment.
  • Be willing and able to comply with all protocol required visits and assessments.

Key Exclusion Criteria:

  • Has any musculoskeletal, neurosensory, other neurological or related disorder that affects the participant's use of his/her feet and/or would impair his/her completion of study assessments as determined by the investigator either due to the disorder or due to pain.
  • Has any significant medical condition(s), which in the investigator's opinion would make the participant unsuitable for enrollment in the study.
  • Has previously participated in clinical studies of KN3835 for plantar fasciitis, plantar fibromatosis, or HMT.

Note: Other inclusion/exclusion criteria may apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Placebo Comparator: Placebo
Other: Placebo
Participants will receive placebo matching to KN3835.
Experimental: KN3835
Biological: KN3835
Participants will receive KN3835.
Other Names:
  • EN3835

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Change From Baseline to Day 57 in Flexion Contracture as Measured by Goniometer
Time Frame: Baseline, Day 57
Baseline, Day 57

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Change From Baseline to Day 57 in the Foot Function Index (FFI) Difficulty Subscale Score
Time Frame: Baseline, Day 57
Baseline, Day 57
Change From Baseline to Day 57 in the FFI Activity Limitation Subscale Score
Time Frame: Baseline, Day 57
Baseline, Day 57
Change From Baseline to Day 57 in the Patient Global Impression of Severity (PGIS) HMT Overall Scale Score
Time Frame: Baseline, Day 57
Baseline, Day 57
Change From Baseline up to Day 57 in Flexion Contracture as Measured by Goniometer
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Percent Change From Baseline up to Day 57 in Flexion Contracture as Measured by Goniometer
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change From Baseline up to Day 57 in the FFI Pain Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change From Baseline up to Day 57 in the FFI Difficulty Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the FFI Activity Limitation Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the FFI Total score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the PGIS Foot Pain Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the PGIS Difficulty Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the PGIS Activity Limitation Subscale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Change from Baseline up to Day 57 in the PGIS HMT Overall Scale Score
Time Frame: Baseline, up to Day 57
Baseline, up to Day 57
Number of Participants With >=1 Point Improvement in the Foot Patient Global Impression of Change (PGIC) Foot Pain Subscale Score
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With >=1 Point Improvement in the PGIC Difficulty Subscale Score
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With >=1 Point Improvement in the PGIC Activity Limitation Subscale Score
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With >=1 Point Improvement in the PGIC HMT Overall Scale Score
Time Frame: Up to Day 57
Up to Day 57
Change from Baseline in the Pain Intensity Numeric Rating Scale (NRS) Score
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With >=1 Point Improvement in the Clinician Global Impression of Change (CGIC) Scale Score
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With >=1 Point Improvement in the Subject Satisfaction with Treatment Scale
Time Frame: Up to Day 57
Up to Day 57
Number of Participants With a ≥ 30% reduction in Flexion Contracture as measured by Goniometry
Time Frame: Baseline to Day 57
Baseline to Day 57
Number of Participants With a ≥ 50% reduction in Flexion Contracture as measured by Goniometry
Time Frame: Baseline to Day 57
Baseline to Day 57
Number of Participants With TEAEs
Time Frame: Baseline to Day 57
Baseline to Day 57

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Endo USA Inc., a Keenova Therapeutics Company

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Medical Director, MD, Endo USA Inc., a Keenova Therapeutics Company

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 11, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 7, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 7, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 14, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 10, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • KN3835-313 HMT

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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