This is a Phase I/II, multicenter study designed to evaluate the safety, tolerability, and preliminary efficacy of GKL-006RTU injection in participants with moderate to severe Acute Respiratory Distress Syndrome (ARDS).
The study consists of two parts:
Phase I is a single-arm, open-label study. Eligible participants will receive a single intravenous infusion of GKL-006RTU injection (1 bag or 3 bags, containing approximately 5.0±0.5×10\^8 invariant natural killer T (iNKT) cells per bag) in addition to standard background treatment. The primary objective of this phase is to assess the safety and tolerability of the investigational product.
Phase II is a randomized, double-blind, placebo-controlled study. Based on the results from Phase I, participants will receive GKL-006RTU injection or placebo via intravenous infusion, in addition to standard background treatment. The primary objective of this phase is to evaluate the efficacy of GKL-006RTU injection in treating moderate to severe ARDS.
Male or female, aged 18 to 80 years (inclusive).
Participants (or their legally authorized representatives, if the participant is unable to provide informed consent) who fully understand the nature of the study, voluntarily sign the informed consent form, and are willing to comply with and complete all study procedures during the study period.
Clinically diagnosed with Acute Respiratory Distress Syndrome (ARDS) according to the diagnostic criteria, with a time from diagnosis to enrollment not exceeding 96 hours.
The etiology of ARDS is confirmed to be infectious.
Positive screening for infectious diseases meeting any of the following: a)Active Hepatitis B virus infection (defined as [positive Hepatitis B Surface Antigen (HBsAg) or positive Hepatitis B Core Antibody (HBcAb)] with Hepatitis B Virus DNA [HBV-DNA] above the upper limit of normal); b) Hepatitis C virus (HCV) infection (defined as positive HCV antibody with HCV-RNA above the upper limit of normal); c) Human Immunodeficiency Virus (HIV) infection (defined as positive HIV antibody); d) Syphilis infection (defined as positive Treponema pallidum antibody).
Known immune system dysfunction (e.g., primary immunodeficiency, acquired immunodeficiency) or currently receiving systemic immunosuppressive therapy.
Expected survival time of less than 72 hours.
Occurrence of a cerebrovascular or cardiovascular event (unstable angina, congestive heart failure, myocardial infarction, or stroke) within the past 6 months; or severe cardiovascular disease at screening: New York Heart Association (NYHA) Functional Classification Class III or higher; uncontrolled myocarditis or valvular disease; hemodynamic instability, severe cardiac dysfunction, malignant arrhythmias, or severe rhythm/conduction abnormalities requiring drug therapy within the past 6 months.