Healthy Clinical Trial
Official title:
A Tolerance Clinical Study On Aerosol Inhalation of Mesenchymal Stem Cells Exosomes In Healthy Volunteers
Exosomes are naturally occurring nanosized vesicles and comprised of natural lipid bilayers with the abundance of adhesive proteins that readily interact with cellular membranes. These vesicles have a content that includes cytokines and growth factors, signaling lipids, mRNAs, and regulatory miRNAs. Exosomes are involved in cell-to-cell communication, cell signaling, and altering cell or tissue metabolism at short or long distances in the body, and can influence tissue responses to injury, infection, and disease. Experimental studies have demonstrated that mesenchymal stem cells (MSCs) or their exosomes (MSCs-Exo) significantly reduced lung inflammation and pathological impairment resulting from different types of lung injury. In addition, macrophage phagocytosis, bacterial killing and outcome were improved. It is highly likely that MSCs-Exo have the similar therapeutic effect on inoculation pneumonia as MSCs themselves. This clinical study will be performed to evaluate the safety and tolerance of aerosol inhalation of the exosomes derived from allogenic adipose mesenchymal stem cells (MSCs-Exo) in healthy volunteers.
Experimental studies have demonstrated that mesenchymal stem cells (MSCs) or their exosomes (MSCs-Exo) significantly reduced lung inflammation and pathological impairment resulting from different types of lung injury. In addition, macrophage phagocytosis, bacterial killing and outcome were improved. It is highly likely that MSCs-Exo have the similar therapeutic effect on inoculation pneumonia as MSCs themselves. Although human bone marrow MSCs have been safely administered in patients with ARDS and septic shock (phase I/II trials), it seems safer to deliver MSCs-Exo rather than live MSCs. The intravenous administration of MSCs may result in aggregating or clumping in the injured microcirculation and carries the risk of mutagenicity and oncogenicity, which do not exist by treating with nebulized MSCs-Exo. Another advantage of MSCs-Exo over MSCs is the possibility of storing them for several weeks/months allowing their safe transportation and delayed therapeutic use. The purpose of this study, therefore, is to explore the safety and efficiency as well as provide a clinical dose reference for the subsequent trails of aerosol inhalation of MSCs-Exo in the treatment of severe lung diseases (including severe lung infection, acute respiratory distress syndrome (ARDS) and chronic obstructive pulmonary disease (COPD), etc.) ;
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