Double-blind, Randomized, Placebo-controlled, Pilot Clinical Trial to Evaluate the Safety, Tolerability and Efficacy of Two Doses of a Conditioned Medium From a Co-culture of M2-macrophages and Fat-derived Mesenchymal Cells (PRS CK STORM) in the Modulation of the Cytokine Storm in Patients With Acute Respiratory Infection Caused by SARS-Cov-2, Influenza A, Influenza B and Respiratory Syncytial Virus (RSV)
The purpose of this clinical trial is to evaluate the safety, tolerability and efficacy of two doses (dose A and dose B) of Standardized Conditioned Medium Obtained by Coculture of M2-macrophages and fat-derived Mesenchymal Stromal Cells (PRS CK STORM) in the modulation of the cytokine storm in participants with acute respiratory infection caused by SARS-Cov-2, influenza A, influenza B and respiratory syncytial virus (RSV) in need for oxygen therapy. The main questions it aims to answer are: * Are both doses of PRS CK STORM (dose A and dose B) safe as an intravenous drug to modulate inflammatory processes, such as the cytokine storm in participants with SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV? * Are both doses of PRS CK STORM (dose A and dose B) effective as an intravenous drug to modulate SIRS-associated cytokine storm caused by SARS-Cov-2, influenza A, influenza B and RSV compared to the control group? * What are the anti-inflammatory and pro-inflammatory cytokine profiles after treatment with two different doses of PRS CK STORM in participants with SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV? Researchers will compare both doses of PRS CK STORM with the control group to test whether the anti-inflammatory action of PRS CK STORM is safe and effective in modulating the cytokine storm for the treatment of SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV. In addition, the anti-inflammatory and pro-inflammatory cytokine profiles after treatment PRS CK STORM compared to placebo group in these participants will be also studied.
• Signed informed consent by the participant or legal representative prior to the initiation of any study-specific procedure.
• Males and females aged ≥ 18 years old at the time of the consent.
• Confirmed diagnosis of SARS-CoV-2, influenza virus A, influenza virus B or RSV pneumonia by positive RT-PCR (results of a PCR prior to screening will be valid only if the PCR has been done for all 4 viruses and in 3 days prior to the screening visit). PCR will include the analysis of SARS-Cov-2, influenza A, influenza B and RSV.
• Diagnosis of systemic inflammatory response syndrome (SIRS), defined by the satisfaction of any two of the criteria below:
‣ Body temperature over 38 ºC or under 36 ºC.
⁃ Heart rate greater than 90 beats/minute.
⁃ Respiratory rate higher than 20 breaths/min or PaCO2 lower than 32 mmHg.
⁃ Leukocyte count higher than 12000/μL, lower than 4000/μL or over 10% immature forms or bands.
• Need for oxygen therapy.
• Female participants must be, either surgically sterilized or at least 1 year postmenopausal (confirmed by follicle-stimulating hormone \[FSH\] more than 20 international units \[Ius\] only for women under 54) or using adequate birth control (hormonal contraception, intrauterine contraceptive device, double barrier methods \[condom with spermicide, diaphragm with spermicide, or condom and diaphragm\]) or sexual abstinence for up to 90 days after the last treatment administration. Male participants must be willing to use barrier contraception (condom) for up to 90 days after the last treatment administration.