A Study to Determine the Safety and Efficacy of TG-C in Subjects With Symptomatic Early Hip Osteoarthritis

A Randomized, Double-Blind, Placebo-Controlled, Phase 2 Study to Determine the Efficacy, Safety, and Dosing of TG-C in Adult Subjects With Symptomatic Early Hip Osteoarthritis

A Randomized, Double-Blind, Placebo-Controlled, Phase 2 Study to Determine the Efficacy, Safety, and Dosing of TG-C in Adult Subjects with Symptomatic Early Hip Osteoarthritis. TG-C will be administered to the target hip by a single ultrasound (or fluoroscopy)-guided, intra-articular injection with image capture showing correct injection of study drug into the femoroacetabular joint. Patients will be followed for 12 months for safety and efficacy.

Study Overview

• Status: Not yet recruiting
• Conditions: Degenerative Osteoarthritis
• Intervention / Treatment: Biological: TG-C; Biological: Placebo Control

Detailed Description

This protocol is designed to assess the safety and efficacy of TG-C in treating symptoms of osteoarthritis of the hip and determining disease modifying effects of TG-C. TG-C will be compared to normal saline as a control. Safety will be evaluated by observation of the injection site for irritation or other effects, the incidence and severity of adverse events, and changes in physical examination findings, radiographic criteria, and laboratory tests. Patients will be followed for 12 months for both safety and efficacy.

• Study Type: Interventional
• Enrollment (Estimated): 255
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Diana Halim, MS; Phone Number: 187 (301) 921-6000; Email: dhalim@tissuegene.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years to 76 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Aged 18 to 80 years old
• The subject has a diagnosis of Grade ≤2 primary OA of the target hip
• Pain ≥ 40 on VAS scale
• The subject has groin pain that is elicited by hip rotation on physical examination
• No history of significant organ system disorders.
• Body mass index (BMI) <40 kg/m2
• Systolic blood pressure of 100 to 160 mmHg and diastolic blood pressure of 60 to 90 mmHg.
• Using birth control
• Written informed consent

Exclusion Criteria:

• The subject exhibits severe symptoms in the target hip that result in difficulty or an inability to walk.
• The subject has severe hip OA ipsilateral to the target hip.
• Previous cartilage transplantation procedure to the injured cartilage surface.
• Major injury to the target hip within 12 months of screening.
• Active dermal ulcer or infection in the proximity of the target hip within 1 month before screening.
• The subject has had surgery on the target hip within the last 6 months.
• Total hip replacement surgery or other surgery on the target hip in the next 12 months.
• MRI indicates bone marrow infiltration, fracture, osteonecrosis/bone infarct, osteochondritis dissecans, tumor, moderate to severe dysplasia, avascular necrosis, post-traumatic arthritis, transient osteoporosis, slipped-cap femoral epiphysis, juvenile idiopathic arthritis, or axial juvenile spondyloarthritis.
• Hip conditions including but not limited to any autoimmune or infectious cause for arthritis; metabolic joint disease; neuropathic disorders, groin pain from non-orthopedic sources, or tumors, congestive heart failure, or chronic kidney disease.
• Uncontrolled diabetes based on a hemoglobin A1c (HbA1c) value >8% at the screening Visit.
• Increased risk for post-procedure bleeding or post-procedure infection.
• Ongoing infectious disease, including, but not limited to, HIV, hepatitis C, or current or prior hepatitis B.
• Cognitive impairment that would limit his/her ability to provide informed consent or to complete assessments and questionnaires.
• 1 year history of drug or alcohol abuse.
• Contraindication to or cannot undergo MRI.
• Active malignancy within the last 5 years.
• Pregnant or is lactating.
• Taken steroidal or NSAIDs within 14 days before the Baseline Visit
• Using topical analgesics on the target hip
• Receiving chronic narcotic treatment at screening.
• Received any injection to the target hip within the 3 months before the Baseline Visit.
• Taking antiplatelet or anticoagulants.
• Participated in an investigational study within 13 weeks before the Screening Visit or in the next 25 months.
• Unable to comply with the requisite study follow-up and all of the follow-up office visits.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo Control (Normal Saline); Normal saline, single 2 mL intraarticular injection	Biological: Placebo Control; 2 mL normal saline injection; Other Names: Normal Saline
Active Comparator: Active Treatment (TG-C); TG-C at 1.0 x 10e7 cells per single 2 mL intraarticular injection	Biological: TG-C; 2 mL injection of non-transduced human chondrocytes and irradiated transduced human GP2-293 cells expressing TGF-B1.; Other Names: TissueGene-C
Active Comparator: Active Treatment 2 (TG-C); TG-C at 3.0 x 10e6 cells per single 2 mL intraarticular injection	Biological: TG-C; 2 mL injection of non-transduced human chondrocytes and irradiated transduced human GP2-293 cells expressing TGF-B1.; Other Names: TissueGene-C

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in Hip Pain as Assessed by VAS	Assessment of change from baseline in target hip pain using the Visual Analog Scale (VAS). The VAS is a method for the assessment of the intensity of pain. The VAS is a horizontal line, 100 mm in length and anchored by word descriptors at each end (no pain, very severe pain). The patient marks on the line at the point that represents their current state. The VAS score is determined by measuring in millimeters from the left hand end to the point of the mark. The score ranges from "0" or no pain to "100" very severe pain.	Baseline to Month 12

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Hip Disability and Osteoarthritis Outcome Score (HOOS)	The HOOS questionnaire was built upon the Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC®). Questions from the WOMAC® were used as the basis for the survey, and 2 dimensions were added: sport and recreation and hip-related quality of life. The HOOS is composed of 40 questions in 5 subscales: Pain (10 items), Symptoms (5 items), Activity of Daily Living (17 items), Sport and Recreation Function (4 items), and Hip-Related Quality of Life (4 items). A total score, ranging from 0 to 100 is calculated. Higher scores represent better functioning.	Baseline to Month 12
Timed Up and Go Test (TUG)	The TUG test is used to determine the time needed to progress from sitting to standing and walking. In addition, the test helps to evaluate the probability for falls. The individual starts in a seated position in a chair with armrests and, upon command, stands up, walks 3 meters, turns around, walks back to the chair, and sits down. The time stops when the subject is seated. The use of walking aids should be recorded and kept consistent between tests.	Baseline to Months 1, 3, 6, 9, and 12
UCLA Activity Score	The UCLA Activity Score includes 10 statements that cover the range of activity states from being "wholly inactive, dependent on others, and cannot leave residence" to "regularly participate in impact sports." The respondents are instructed to select one statement that is most representative of their current activity. Lower scores on the scale reflect a low level of activity and higher scores reflect more activity.	Baseline to Months 1, 3, 6, 9, and 12
Joint Space Width (JSW) on standing X-ray	To evaluate the effects of 2 dose levels of TG-C on the structural features of the hip joint	Baseline to Month 12
WOMAC® (Western Ontario and McMaster Universities Osteoarthritis Index) total score	To evaluate the effects of 2 dose levels of TG-C on symptoms of OA of the hip. The test questions are scored on a scale of 0-4, which correspond to: None (0), Mild (1), Moderate (2), Severe (3), and Extreme (4). Higher scores on the WOMAC indicate worse pain, stiffness, and functional limitations.	Baseline to Month 12

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Physical Component Score (PCS) of the Short Form 12-Item Health Survey (SF-12 Questionnaire)	Evaluation the Health-Related Quality of Life (HRQoL) as measured by the physical component score (PCS) of the 12-Item Short-Form Health Survey version 2 (SF-12v2®) questionnaire addresses physical functioning, role-physical, bodily pain, general health perceptions, vitality, social functioning, role-emotional, and mental health. The mean score is set to 50. Scores >50 indicate better physical or mental health than the mean, and scores <50 indicate worse physical or mental health than the mean.	12 months
Clinician Global Impression of Change (CGI-C)	The CGI-C asks clinicians to choose the response that best describes the overall change in the patient's OA since they received the study medication as "much better," "moderately better," "a little better," "no change," "a little worse," "moderately worse," or" much worse." Clinicians are also asked to indicate if the change that the patient has experienced is clinically meaningful.	Week 1 and Months 1, 3, 6, 9, and 12
Clinician Global Impression of Severity (CGI-S)	clinician to choose the response that best describes the severity of the patient's overall OA as "none," "mild," "moderate," or "severe."	Baseline and at Months 1, 3, 6, 9, and 12
Patient Global Impression of Severity (PGI-S)	patients to select the response that best describes the severity of their OA, their OA-related pain, and their OA-related stiffness and their difficulty with activities as a result of their OA as "none," "mild," "moderate," or "severe."	Baseline and at Months 1, 3, 6, 9, and 12
Patient Global Impression of Change (PGI-C)	patients to choose the response that best describes the overall change in their OA, their OA-related pain, and their OA-related stiffness and the change in their difficulty with activities as a result of their OA since they received the study medication as "much better," "moderately better," "a little better," "no change," "a little worse," "moderately worse," or "much worse." Patients are also asked to indicate if the change that they have experienced is meaningful to them ("yes," "no," or "not applicable" in the case of no change)	Week 1 and Months 1, 3, 6, 9, and 12

Collaborators and Investigators

• Sponsor: Kolon TissueGene, Inc.
• Investigators: Study Chair: Moon Jong Noh, PhD, Kolon TissueGene, Inc.

Study record dates

Study Major Dates

• Study Start (Estimated): October 1, 2026
• Primary Completion (Estimated): October 1, 2027
• Study Completion (Estimated): October 1, 2027

Study Registration Dates

• First Submitted: March 2, 2022
• First Submitted That Met QC Criteria: March 2, 2022
• First Posted (Actual): March 11, 2022

Study Record Updates

• Last Update Posted (Actual): May 22, 2026
• Last Update Submitted That Met QC Criteria: May 20, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Keywords: hip
• Additional Relevant MeSH Terms: Musculoskeletal Diseases; Joint Diseases; Pharmaceutical Preparations; Crystalloid Solutions; Isotonic Solutions; Solutions; Saline Solution
• Other Study ID Numbers: TGC-OAH-201

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.: No