A Study to Evaluate KYN-5356 in Adults With Cognitive Impairment Associated With Schizophrenia

NCT ID: NCT07191483

Last Updated: 2025-09-25

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

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

150 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-08-27

Study Completion Date

2026-12-31

Brief Summary

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This is a Phase 2, randomized, double-blind, placebo-controlled study to evaluate the efficacy, safety, Pharmacokinetic (PK) and Pharmacodynamic (PD) effects of 3 different dose regiments of KYN-5356 and placebo for 28 days.

Participants will be randomized to one of 4 treatment groups: placebo, KYN-5356 low dose, KYN-5356 medium dose, KYN-5356 high dose.

Participants will be admitted to the clinic on Day -3 and will remain in residence at the clinic for 32 days, from baseline through the treatment period.

Participants will be administered investigational medicinal product on Days 1 through 28. Efficacy, safety, PK and exploratory PD assessments will be performed throughout the dosing period. Participants will be discharged on Day 29 after safety assessments are completed and return for a follow-up visit on Day 42.

A subset of participants from selected sites will undergo electrophysiological assessments to evaluate the effect of KYN-5356 on neurophysiological measures of brain function.

Detailed Description

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Conditions

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Cognitive Impairment Associated With Schizophrenia (CIAS)

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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KYN-5356 low dose

KYN-5356 low dose, oral tablet for 28 days

Group Type EXPERIMENTAL

KYN-5356 low dose

Intervention Type DRUG

oral tablet

KYN-5356 medium dose

KYN-5356 medium dose, oral tablet for 28 days

Group Type EXPERIMENTAL

KYN-5356 Medium Dose

Intervention Type DRUG

oral tablet

KYN-5356 high dose

KYN-5356 high dose, oral tablet for 28 days

Group Type EXPERIMENTAL

KYN-5356 High Dose

Intervention Type DRUG

oral tablet

Placebo

Placebo, oral tablet for 28 days

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Oral tablet

Interventions

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KYN-5356 low dose

oral tablet

Intervention Type DRUG

Placebo

Oral tablet

Intervention Type OTHER

KYN-5356 Medium Dose

oral tablet

Intervention Type DRUG

KYN-5356 High Dose

oral tablet

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Has an established primary psychiatric diagnosis of schizophrenia
* Clinically stable and in the residual (nonacute) phase of their illness for at least 8 weeks before screening in the judgement of the investigator
* Diagnosis of schizophrenia for at least 1 year before screening
* Must be in ongoing maintenance antipsychotic monotherapy on a stable medication treatment regimen for ≥ 2 months before screening, including concomitant psychotropic medications.
* Male or female, aged ≥18 and ≤55 years
* Has a body mass index (BMI) between 18 and 40 kg/m2 Inclusive
* Must exhibit capability to comply with all protocol procedures in the judgement of the investigator
* Signed and dated written informed consent before screening in accordance with Good Clinical Practice.

Exclusion Criteria

* Currently being treated with more than 1 antipsychotic at the time of screening,
* A score of 2 or higher on any of the individual items of the Modified Simpson-Angus Scale (mSAS) at screening
* Moderate to severe substance use disorder (other than nicotine or caffeine, but including alcohol)
* Evidence of unstable medical condition
Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Kynexis B.V.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Woodland International Research Group

Little Rock, Arkansas, United States

Site Status RECRUITING

Synergy Research Center

Lemon Grove, California, United States

Site Status RECRUITING

Cenexel CNS

Los Alamitos, California, United States

Site Status RECRUITING

Cenexel RCA

Hollywood, Florida, United States

Site Status RECRUITING

Segal Trials

Miami Lakes, Florida, United States

Site Status RECRUITING

Cenexel ACMR

Atlanta, Georgia, United States

Site Status RECRUITING

Cenexel iResearch Atlanta

Decatur, Georgia, United States

Site Status RECRUITING

Uptown Research Institute

Chicago, Illinois, United States

Site Status RECRUITING

Cenexel CBH

Gaithersburg, Maryland, United States

Site Status RECRUITING

Arch Clinical Trials

St Louis, Missouri, United States

Site Status RECRUITING

Cenexel HRI

Marlton, New Jersey, United States

Site Status RECRUITING

Neuro-Behavioral Clinical Research

North Canton, Ohio, United States

Site Status RECRUITING

Community Clinical Research

Austin, Texas, United States

Site Status RECRUITING

Countries

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United States

Facility Contacts

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Principal Investigator

Role: primary

501-221-8681

Principal Investigator

Role: primary

619-303-6130

Principal Investigator

Role: primary

714-799-7799

Principal Investigator

Role: primary

954-990-7649

Principal Investigator

Role: primary

786-570-1971

Principal Investigator

Role: primary

404-881-5800

Principal Investigator

Role: primary

404-537-1281

Principal Investigator

Role: primary

773-989-8313

Principal Investigator

Role: primary

301-251-4702

Principal Investigator

Role: primary

314-282-3521

Principal Investigator

Role: primary

856-452-9901

Pri

Role: primary

330-493-1118

Principal Investigator

Role: primary

512-597-6704

Other Identifiers

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KYN5356-CL-002

Identifier Type: -

Identifier Source: org_study_id

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