Transplantation of ACE2- Mesenchymal Stem Cells Improves the Outcome of Patients with COVID-19 Pneumonia

Abstract

A coronavirus (HCoV-19) has caused the novel coronavirus disease (COVID-19) outbreak in Wuhan, China. Preventing and reversing the cytokine storm may be the key to save the patients with severe COVID-19 pneumonia. Mesenchymal stem cells (MSCs) have been shown to possess a comprehensive powerful immunomodulatory function. This study aims to investigate whether MSC transplantation improves the outcome of 7 enrolled patients with COVID-19 pneumonia in Beijing YouAn Hospital, China, from Jan 23, 2020 to Feb 16, 2020. The clinical outcomes, as well as changes of inflammatory and immune function levels and adverse effects of 7 enrolled patients were assessed for 14 days after MSC injection. MSCs could cure or significantly improve the functional outcomes of seven patients without observed adverse effects. The pulmonary function and symptoms of these seven patients were significantly improved in 2 days after MSC transplantation. Among them, two common and one severe patient were recovered and discharged in 10 days after treatment. After treatment, the peripheral lymphocytes were increased, the C-reactive protein decreased, and the overactivated cytokine-secreting immune cells CXCR3+CD4+ T cells, CXCR3+CD8+ T cells, and CXCR3+ NK cells disappeared in 3-6 days. In addition, a group of CD14+CD11c+CD11b^mid regulatory DC cell population dramatically increased. Meanwhile, the level of TNF-α was significantly decreased, while IL-10 increased in MSC treatment group compared to the placebo control group. Furthermore, the gene expression profile showed MSCs were ACE2^- and TMPRSS2^- which indicated MSCs are free from COVID-19 infection. Thus, the intravenous transplantation of MSCs was safe and effective for treatment in patients with COVID-19 pneumonia, especially for the patients in critically severe condition.

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Affiliated Institutions

• University of Palermo IT
• University of North Texas Health Science Center US
• Institute of Chemistry, Komi Science Center RU
• Tel Aviv University IL
• University of North Texas US
• Russian Academy of Sciences RU
• King's College London GB
• Maharishi Markandeshwar University, Mullana IN
• Universitat de València ES
• Shanghai University CN
• Inha University KR
• Beijing YouAn Hospital CN
• Capital Medical University CN
• First Affiliated Hospital of Zhengzhou University CN
• Qingdao University CN
• University of Macau MO
• Chinese Academy of Medical Sciences & Peking Union Medical College CN
• Peking Union Medical College Hospital CN
• Second Affiliated Hospital of Xi'an Jiaotong University CN
• UNESCO FR

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