RecruitingPhase 1Phase 2NCT07413978

A Clinical Trial of Human Umbilical Cord Mesenchymal Stem Cell Injection for the Treatment of Severe Acute Respiratory Distress Syndrome

A Phase I-II, Open-label, Single-arm, Dose-escalation Clinical Trial to Evaluate the Safety and Tolerability of Human Umbilical Cord Mesenchymal Stem Cell Injection in the Treatment of Moderate to Severe Acute Respiratory Distress Syndrome

Sponsor

Changchun Tuohua Pharmaceutical Co., Ltd.

Enrollment

36 participants

Start Date

Apr 25, 2025

Study Type

INTERVENTIONAL

Conditions

Acute Respiratory Distress Syndrome

Summary

Primary Objective: To evaluate the safety and tolerability of human umbilical cord mesenchymal stem cell injection in the treatment of moderate/severe acute respiratory distress syndrome.Secondary Objectives: To explore the efficacy and appropriate dosage of human umbilical cord mesenchymal stem cell injection in the treatment of moderate/severe acute respiratory distress syndrome.Exploratory Objective: To explore the immunogenicity and pharmacokinetic/pharmacodynamic (PK/PD) characteristics of a single dose of human umbilical cord mesenchymal stem cell injection in patients with moderate/severe acute respiratory distress syndrome.

Eligibility

Min Age: 18 YearsMax Age: 80 Years

Inclusion Criteria6

Male or female patients aged 18 to 80 years (inclusive).
Diagnosis of moderate or severe Acute Respiratory Distress Syndrome (ARDS) according to A New Global Definition of Acute Respiratory Distress Syndrome, with an infectious etiology.
No improvement after 24 hours of conventional clinical treatment (defined as a persistent PaO₂/FiO₂ ratio ≤200 mmHg or a decrease from >200 mmHg to ≤200 mmHg after 24 hours of conventional supportive therapy; for severe ARDS, this assessment period may be shortened to 8 hours).
Ability to fully understand the nature of the study and voluntarily provide written informed consent.
Willingness to comply with all study procedures and demonstrate good compliance during the study period.
Agreement to participate in long-term follow-up.

Exclusion Criteria18

Patients with ARDS caused by COVID-19 infection.
Patients currently suffering from hepatitis B, hepatitis C, active or latent tuberculosis, AIDS, syphilis, immunodeficiency disorders, or other immune system diseases.
Presence of severe cardiovascular diseases at screening, including:Cardiac function classification of NYHA class III or higher.Uncontrolled myocarditis or valvular disease.Malignant arrhythmia requiring pharmacological treatment.
Abnormal liver or renal function at screening meeting any of the following criteria:ALT or AST ≥ 5 × ULN, or total bilirubin ≥ 3 × ULN.Serum creatinine ≥ 3 × ULN, or patients currently undergoing renal replacement therapy (CRRT).
Patients receiving extracorporeal membrane oxygenation (ECMO) therapy at the time of screening.
Severe hematological abnormalities at screening, including: hemorrhagic manifestations, PTA ≤ 40% (or INR ≥ 2.0), severe anemia (Hb < 60 g/L), moderate or severe thrombocytopenia (PLT < 50 × 10\^9/L), disseminated intravascular coagulation (DIC), leukemia, or other hematological abnormalities deemed ineligible for the study.
Severe end-stage respiratory diseases at screening.
Pulmonary hypertension with a pulmonary artery pressure > 70 mmHg.
History of deep vein thrombosis or pulmonary embolism within the 6 months prior to enrollment.
Patients post lung transplantation.
Presence of severe cardiopulmonary malformations at screening.
Severe psychiatric disorders.
Patients who are pregnant (positive pregnancy test), breastfeeding, or have a pregnancy plan, are unwilling to practice contraception during the study and for 12 months after the infusion, or are of childbearing potential and unwilling to use effective contraception.
Use of high-dose corticosteroids equivalent to methylprednisolone > 240 mg/day within 3 days prior to enrollment, or long-term irregular use of systemic corticosteroids for other diseases, which, in the investigator's judgment, may affect efficacy evaluation.
Allergy to any component of the Human Umbilical Cord Mesenchymal Stem Cell Injection (e.g., human albumin), or a history of severe allergies deemed by the investigator as unsuitable for participation.
Concurrent participation in another interventional clinical trial, or participation in another interventional clinical trial within the 3 months prior to screening.
History or current diagnosis of malignancy, or pathological confirmation of precancerous lesions.
Any other condition that, in the investigator's judgment, would lead to premature termination of the study, such as non-adherence to the protocol, concurrent severe illnesses requiring combined treatment, significant laboratory abnormalities, or social/family factors that could compromise the patient's safety or data collection.