Main objective: To explore the safety and tolerability of human umbilical cord mesenchymal stem cell injection in the treatment of interstitial lung disease (ILD); Secondary objective: To explore the preliminary effectiveness of human umbilical cord mesenchymal stem cell therapy for interstitial lung disease (ILD) and recommend appropriate cell therapy doses for subsequent clinical studies; Exploring the immunogenicity of human umbilical cord mesenchymal stem cell injection in the treatment of interstitial lung disease (ILD).
Gender not limited, age ≥ 18 years old (including threshold);
Clinical diagnosis of interstitial lung disease;
Blood biochemistry tests must meet the following criteria: alanine aminotransferase (ALT) ≤ 2.5 × ULN, aspartate aminotransferase (AST) ≤ 2.5 × ULN, total bilirubin (TBIL) ≤ 2 × ULN, direct bilirubin (DBIL) ≤ 1.5 × ULN, or creatinine (Cr) ≤ 3 × ULN;
The diffusion capacity of carbon monoxide (DLCO) (corrected by Hb) in lung function tests within the previous 3 months is 30% to 80% of the expected value (including 30% and 80%); Forced vital capacity (FVC) is 40% to 70% of the estimated value (including 40% and 70%)
Within the first 3 days of enrollment, use high-dose corticosteroids (equivalent to methylprednisolone>240 mg/day) or irregularly use systemic corticosteroids;
For patients receiving immunosuppressive therapy, unstable background treatment with cyclophosphamide, mycophenolate mofetil/sodium, methotrexate, or other immunosuppressive monotherapy is not allowed (combination therapy is not allowed)
Diagnose IPF patients who have previously taken drugs that may cause or worsen pulmonary fibrosis;
Individuals with a history of mechanical ventilation or concurrent infectious pneumonia or asthma within the previous month prior to screening; Patients with airway obstruction disease (FEV1/FVC<0.7 before using bronchodilators); Patients with other clinically significant serious abnormalities in the lungs; Currently requiring oxygen therapy treatment (oxygen therapy time>15h/d);