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Knee OsteoarthritisPhase 2NCT07547735

Phase II Clinical Trial of UC-MSCs in the Treatment of Knee Osteoarthritis

A Phase 2 study testing UC-MSCs in people with Knee Osteoarthritis, run by Union Hospital, Tongji Medical College, Huazhong University of Science and Technology at 3 sites in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

In recent years, the incidence rate and disability rate of osteoarthritis have continued to grow, and it has become a common chronic disease of elderly patients, second only to the "three highs", and poses a continuous threat to China's medical and health system and public health system. Read more about this study

Who is it for?
Ages 40 to 70 years
Conditions the study is for
Knee Osteoarthritis
What is being tested?
UC-MSCs
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
100 participants
Where
3 sitesChina
Study dates
20 Mar 2025to 30 May 2028
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 40 to 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Prior to conducting any assessment, written informed consent must be obtained;
  • Able to communicate well with researchers during screening, understand and comply with experimental requirements;
  • Age range from 40 to 70 years old (including threshold), regardless of gender;
  • Male weight ≥ 50 kg, female weight ≥ 45 kg, body mass index (BMI) within the range of 18-28 kg/m2 (including critical values);
  • According to the diagnostic criteria for knee osteoarthritis in the "Guidelines for the Diagnosis and Treatment of Osteoarthritis (2018 Edition)", subjects diagnosed with knee osteoarthritis (see Annex 1 for details); The course of knee osteoarthritis is more than 4 weeks;
  • Other:
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  • 15) There are contraindications to MRI examination or unwillingness to undergo MRI examination; 16) Hepatitis B, hepatitis C, AIDS, syphilis serological test positive pathogens; 17) Pregnant or lactating women, or male or female patients who tested positive for blood pregnancy during screening or have planned childbirth within 3 months after medication; 18) Patients who have received live vaccines or attenuated live vaccines within one month before administration; 19) Patients who have participated in clinical trials of other drugs or devices within 3 months prior to administration; 20) Patients with poor compliance, poor communication skills, inability to adhere to follow-up, and inability to complete the entire trial; 21) The researchers believe that it is not suitable for participants to enter this experiment.
  • 6) The target knee joint X-ray Kellgren Lawrence radiological grading (K-L IV grade) is II-III grade. Patients diagnosed with knee osteoarthritis on both sides should have non target knee joint symptoms, signs, and grading that do not exceed the target knee joint; 7) MRI examination shows partial or full layer damage to the cartilage of the knee joint; 8) A VAS score of ≥ 4 and ≤ 7 for knee joint pain at least 48 hours after discontinuing the use of all painkillers during screening; 9) Patients who use analgesic therapy (taking paracetamol/acetaminophen) to control local pain in the target knee joint agree to discontinue the use of similar analgesics 2 weeks prior to administration, and only allow NSAID as a rescue drug; Patients who use glucosamine, chondroitin, opioid drugs, or diacetate, glucosamine, etc. must agree to discontinue such drugs from 2 weeks prior to administration.
  • -

Who cannot join

  • History of local/systemic treatment:
  • Individuals with a history of knee joint infection, surgery, and radiation therapy within 6 months prior to administration;
  • Combined instability of the knee joint (anterior and posterior cruciate ligaments, medial and lateral collateral ligaments), rupture, relaxation, or external deformity of the knee joint;
  • According to researchers, diseases that may interfere with knee joint function assessment, such as symptomatic lower back pain, lumbar disc herniation, and hip joint pain in the target knee joint;
  • According to the judgment of researchers, local diseases that may confuse knee joint function assessment include but are not limited to septic arthritis, reactive arthritis, clinically recurrent pseudogout, chondrocalcinosis, or joint fractures;
  • Within 3 months prior to administration, any medication injection treatment (including intra-articular injection of growth factors, hormones, or sodium hyaluronate) or lavage surgery has been received in the knee joint (target side) cavity;
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  • Merge intra-articular or periarticular tumors (such as knee synovial chondroma, pigmented nodular synovitis, etc.);
  • Systemic diseases and treatment history:
  • Various serious systemic diseases such as neurological disorders, respiratory disorders, heart diseases (NYHA grade III and above), and liver dysfunction (ALT>3)×ULN or AST>3×ULN, renal dysfunction Cr>2×ULN or BUN>2×ULN, coagulation dysfunction (INR>1.5), or severe hematological disorders (such as grade 3 or above anemia, hemoglobin (Hb)<8 g/dL, grade 2 or above thrombocytopenia, PLT<75×10 ^ 9/L);
  • Diagnosed as systemic inflammatory arthritis or connective tissue disease, including but not limited to rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, gout, Paget's disease, systemic lupus erythematosus, or other systemic diseases that may confuse KOA assessment (such as fibromyalgia);
  • Subjects who receive long-term (>14 days) oral corticosteroids>5 mg/day within 3 months prior to administration, or who require long-term glucocorticoid treatment during the trial period;
  • Previously received stem cell therapy;
  • Uncontrolled hypertension is defined as systolic blood pressure (SBP)>160 mmHg or diastolic blood pressure (DBP)>100 mmHg during screening;
  • Having a history of tumors, mental illness, severe autoimmune diseases, hematological diseases, and long-term use of immunosuppressants;
  • Have a history of alcohol and prohibited drug abuse;
  • Has a history of hypersensitivity to protein drugs;

Trial locations and contacts

3 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Hongtao Tian, MD contact

18627171618

tianhongtao@vip.163.com

China3 sites, 3 recruiting
  • Guangzhou First People's Hospital

    Wuhan

    Jianwei Wang, 13316188653

    Recruiting
  • Wuhan Fourth Hospital

    Wuhan

    Qingsong Zhang, 18627858073

    Recruiting
  • Wuhan Third Hospital

    Wuhan

    Zhanghua Li, 18971610121

    Recruiting

Other trials in China

About this study

Official title: Multi-center, Randomized, Double-blinded, Placebo-controlled Phase II Clinical Trial of UC-MSCs for the Treatment of Knee Osteoarthritis

In recent years, the incidence rate and disability rate of osteoarthritis have continued to grow, and it has become a common chronic disease of elderly patients, second only to the "three highs", and poses a continuous threat to China's medical and health system and public health system. Knee osteoarthritis is the main type of osteoarthritis, ranking 11th in global disability diseases and 38th in disability adjusted life year loss, causing significant economic burden to patients, families, and society. At present, most of the treatment methods for KOA have limited efficacy, only relieving pain symptoms and cannot prevent cartilage damage and other tissue damage in the joints. Due to the limitations of adverse events, there is still no optimal treatment plan for KOA. Most studies believe that autologous mesenchymal stem cell transplantation is a new treatment method with good efficacy and good repair effect for mild to moderate cartilage defects. Given that there is currently no optimal treatment plan for KOA, human umbilical cord mesenchymal stem cell injection has potential development value and is of great significance for the treatment of KOA patients.

Read the detailed description

Osteoarthritis (OA) is a chronic inflammatory disease of the bone and joints, characterized by degenerative destruction of articular cartilage, subchondral bone sclerosis and osteophyte formation, and peripheral soft tissue inflammation and proliferation. Knee Osteoarthritis (KOA), which is negative and highly active, is the most common. Currently, there are approximately 1 billion KOA patients worldwide, with approximately 150 million patients in China, and the incidence rate increases with age. The clinical manifestation of KOA is repeated and prolonged bone and joint pain, which seriously affects the patient's quality of life, ultimately leading to joint structural damage and loss of function, causing a significant burden on individuals, families, and society. At present, there is a lack of effective treatment methods for KOA both domestically and internationally, and there is an urgent need to research new treatment strategies to meet clinical needs. Numerous studies have shown that local inflammation of the joint cavity and apoptosis of articular chondrocytes are the main pathological mechanisms of knee osteoarthritis. Therefore, the key to treating KOA is to inhibit the local inflammatory response of bone joints, promote chondrocyte regeneration, repair damaged joint surfaces, and restore their normal structure and function.

Mesenchymal Stem Cells (MSCs) are the most widely studied pluripotent stem cells. It exists in various tissues, has multidirectional differentiation potential, homing effect and powerful paracrine function, can regulate tissue microenvironment, promote damaged tissue repair through cell replacement, promote in-situ cell regeneration, anti-inflammatory and immune regulation and other mechanisms. Therefore, mesenchymal stem cell therapy has become the focus of KOA new therapy research. A large number of studies have shown that MSCs can be induced to differentiate into stable mature chondrocytes that can express proteoglycan and type II collagen. Fluorescently labeled MSCs could still be detected 10 weeks after injection into the joint cavity of osteoarthritis model animals, suggesting that MSCs homed in the injured articular cartilage tissue and participated in the regeneration and repair of the injured tissue. The effectiveness of MSCs therapy for KOA has been demonstrated in osteoarthritis models in different animals including rats, rabbits, sheep, pigs, and monkeys. MSCs from different sources can effectively inhibit the inflammatory response and chondrocyte injury in model animals, and stimulate the regeneration and repair of injured chondrocytes.

Based on the Phase I clinical trial that has entered the follow-up phase, the applicant is applying for a "Multi-center, randomized, double-blinded, placebo-controlled Phase II Clinical Trial of UC-MSCs for the Treatment of Knee Osteoarthritis". A total of 100 subjects are planned to be enrolled and randomly assigned in a 2:2:1 ratio to Treatment Group 1 (5.0 × 10⁶ cells/2.5 mL, 40 subjects), Treatment Group 2 (2.0 × 10⁷ cells/2.5 mL, 40 subjects) and Placebo group (20 subjects). The objective is to obtain a more comprehensive and direct assessment of the safety, efficacy, and optimal effective dose of UC-MSCs for knee osteoarthritis.

Being tested
UC-MSCs, placebo
Keywords
Knee Osteoarthritis; UC-MSCs; Cell Therapy; Efficiency; Safety
Medical subject headings
Osteoarthritis, Knee

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • UC-MSCsDrug

    1 time of UC-MSCs (5×10^6 UC-MSCs/2.5mL, single injection into the knee cavity

  • UC-MSCsDrug

    1 time of UC-MSCs (2×10^7 UC-MSCs/2.5mL, single injection into the knee cavity).

  • placeboDrug

    1 time of placebo (2.5mL normal saline containing 1 % human serum albumin, single injection into the knee cavity)

Study groups in NCT07547735
Study groupRoleWhat they receive
UC-MSCs Treatment Group 1ExperimentalParticipants will receive conventional treatment plus 1 time of UC-MSCs (5×10^6 UC-MSCs/2.5mL, single injection into the knee cavity).
Receives: Drug: UC-MSCs
UC-MSCs Treatment Group 2ExperimentalParticipants will receive conventional treatment plus 1 time of UC-MSCs (2×10^7 UC-MSCs/2.5mL, single injection into the knee cavity).
Receives: Drug: UC-MSCs
Placebo GroupPlacebo comparatorParticipants will receive conventional treatment plus 1 time of placebo (2.5mL normal saline containing 1 % human serum albumin, single injection into the knee cavity).
Receives: Drug: placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Changes in WOMAC score from baseline

    Measured: From Baseline (0 Week) to post-dose, 4 weeks, 12 weeks, 24 weeks, and 48 weeks after treatment

Secondary outcomes (7)
  1. Changes in VAS score from baseline

    Measured: From Baseline (0 Week) to post-dose, 4 weeks, 12 weeks, 24 weeks, and 48 weeks after treatment]

  2. Changes in knee joint range of motion from baseline

    knee joint range of motion

    Measured: From Baseline (0 Week) to 4 weeks, 12 weeks, 24 weeks, 48 weeks after treatment

  3. Changes in X-Kellgren-Lawrence grading

    Measured: From Baseline (0 Week) to 24 weeks, 48 weeks after treatment

  4. Changes of MRI-Roberts cartilage repair score compared with baseline

    Measured: From Baseline (0 Week) to 24 weeks, 48 weeks after treatment

  5. minimum joint space width (mJSW) from baseline

    Measured: From Baseline (0 Week) to 24 weeks, 48 weeks after treatment

  6. Changes of cartilage thickness compared with baseline

    Measured: From Baseline (0 Week) to 24 weeks, 48 weeks after treatment

  7. Changes of synovial inflammation score (reference MOAKS) compared with baseline

    Measured: From Baseline (0 Week) to 24 weeks, 48 weeks after treatment

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 Apr 2026
  2. Study start20 Mar 2025
  3. Primary completion30 May 2027 (estimated)
  4. Study completion30 May 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
100 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07547735
Sponsor's protocol ID
UHCT250346
Status last verified
Apr 2026
First submitted
29 Mar 2026
Last updated
23 Apr 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing UC-MSCs in people with Knee Osteoarthritis, run by Union Hospital, Tongji Medical College, Huazhong University of Science and Technology at 3 sites in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 9 inclusion and 16 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 23 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Hongtao Tian, MD (18627171618, tianhongtao@vip.163.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Changes in WOMAC score from baseline (time frame: From Baseline (0 Week) to post-dose, 4 weeks, 12 weeks, 24 weeks, and 48 weeks after treatment). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Apr 2026.

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