Clinical trial NCT06021067: Dead Mesenchymal Stem Cells for Radiation Lung Injury
Official title: Dead Mesenchymal Stem Cells for the Treatment of Radiation Lung Injury
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE1
PHASE2
Conditions: Radiation Lung Injury
Keywords: Dead Mesenchymal Stem Cells
Radiation Lung Injury
Treatment
Lead sponsor: Sichuan University
Sponsor class: OTHER
First posted: 2023-09-01
Enrollment: 15
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: one-arm study
Primary purpose: TREATMENT

Brief summary: The aim of this single center, single arm and prospective study is to explore the safety and efficacy of hDMSCs in the treatment of radiation pneumonitis.

Detailed description: As a single-center, single-arm, prospective clinical trial, this study aims to explore the safety and efficacy of hDMSCs in the treatment of radiation pneumonia. This study will include patients who have received chest radiation therapy and are diagnosed with radiation lung injury based on clinical manifestations and changes in chest CT imaging. The degree of lung injury is graded according to CTCAE v5.0 criteria, and the corresponding standard treatment is received according to its grade. Using the 3+3 design for dose climbing, according to the order of patient inclusion, the first 3 patients (cohort 1) are treated with a standard treatment regimen combined with a pre-specified starting dose of dead mesenchymal stem cells (this study does not set up a live MSC group as a control). There are currently no relevant research results of previous human trials. The starting dose is obtained by our preclinical research. The mouse dose is 1×10\^5/pc/30g, that is, the effective dose of mice is 3.3×10\^6/kg. The dose of mice is 10 times that of humans, and the effective dose of humans is 3.3×10\^5/kg. Therefore, the clinical effective dose of 60kg patients is 2.0×10\^7, infusion every 3 days, continuous infusion 4 times, treatment duration of 4\~6 weeks. During the dose-limited toxicity (DLT) observation period (30 days), observe the number of cases of DLT in 3 patients to determine whether to maintain the current dose group or adjust the dose group. If the dose of dead mesenchymal stem cells needs to be increased, the dose is ramped up by 3 times the starting dose (i.e., the second gradient dose is 6.0×10\^7) until the number of patients in either dose group reaches 6 or the dose group adjustment is not possible. To determine the optimal therapeutic dose for the treatment of radiation lung injury using death mesenchymal stem cells in combination with standard therapy. A total of 15 patients were planned to be included in this study.

Eligibility criteria: Inclusion Criteria:

* Received chest radiotherapy;
* EOCG PS score of 0 to 3 points;
* Diagnosis of radiation lung injury by the attending physician, grade 2 to 3 (according to the CTCAE v5.0 standards);
* Main organs function is normal, that meet the following criteria: blood routine examination (within 7 days of unused hematopoietic growth factors and blood transfusion) : ANC ≥ 1.5 x 10\^9 / L, PLT ≥ 80 x 10\^9 / L, HGB ≥ 80 g/L;Biochemical examination: TBil ≤ 1.5 x ULN (upper limit of normal);ALT or AST ≤ 2.5 x ULN; Creatinine clearance ≥ 60 mL/min (Cockcroft - Gault formula); Blood coagulation function: INR or PT ≤ 1.5 x ULN, if the subjects are receiving anticoagulant therapy, as long as the scope of PT in anticoagulant drugs for it. Heart function examination, electrocardiogram (ECG) normal or abnormal ECG (by the researchers to determine the clinical significance). Heart doppler ultrasound assessment: LVEF ≥ 50%;
* Radiation lung injury lasts less than 2 months；
* Survival expectation ≥6 months;
* Signed and dated written informed consent

Exclusion Criteria:

* Pregnant or lactating women, men and women of childbearing age who are unwilling or unable to take effective contraceptive measures;
* People with a history of chronic bronchitis, emphysema, or cor pulmonale;
* History of lung resection surgery;
* Tumor progression;
* People with severe lung infection;
* Uncontrollable severe systemic diseases (e.g., central nervous system, cardiovascular system, blood system, digestive system, endocrine system, respiratory system, genitourinary system, immune system, etc.) and psychosis;
* Serious cardiovascular events: a period of 6 months in heart failure (NYHA class III level IV), myocardial infarction, unstable angina, severe arrhythmia, cerebral infarction, cerebral hemorrhage;
* Abnormal liver and kidney function: AST and ALT exceed the upper limit of normal by 2.5 times. Serum creatinine is greater than 1.5 mg/dl in men and 1.4 mg/dl in women;
* Co-infection with HIV, Treponema pallidum, tuberculosis, influenza virus, adenovirus and other respiratory infections;
* Hemorrhage or thrombosis, bleeding or anticoagulant drugs;
* Combined with cachexia or other organ failure (requiring organ support);
* Shock or invasive ventilation;
* Combined with pulmonary interstitial pneumonia caused by other reasons or damage, or lung imaging showed radioactive lung injury diagnosed with pulmonary interstitial pneumonia or damage before;
* Patients who have participated in clinical studies of stem cells;
* The investigators believed that there were other reasons why participants were not suitable for the study.

Primary outcomes:
measure: The number of adverse events
timeFrame: up to 1 year
Secondary outcomes:
measure: Chest contrast-enhanced CT will be used to assess changes in lung injury after treatment
timeFrame: up to 1 year
measure: Blood gas analysis will be performed after 1 month of dead mesenchymal stem cell injection.
timeFrame: up to 1 year
measure: Pulmonary function test will be performed after 1, 2, 3, 6, 12month of dead mesenchymal stem cell injection.
timeFrame: up to 1 year
measure: 6-minute walking tests will be performed after 1, 2, 3, 6, 12month of dead mesenchymal stem cell injection.
timeFrame: up to 1 year
measure: St. George's Respiratory Questionnaire will be completed to estimate the quality of life after 1, 2, 3, 6, 12month of dead mesenchymal stem cell injection.
timeFrame: up to 1 year
Other outcomes:
Locations:
city: Chengdu
country: China
facility: West China Hospital
state: Sichuan
Study officials:
affiliation: Sichuan University
name: Zhen-Yu Ding, Prof
role: PRINCIPAL_INVESTIGATOR
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