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Exosomes Derived From Mesenchymal Stem Cells Improved Function and Survival of Neutrophils From Severe Congenital Neutropenia Patients in Vitro Publisher Pubmed



Mahmoudi M1 ; Taghavifarahabadi M2 ; Namaki S1 ; Baghaei K3 ; Rayzan E4 ; Rezaei N2, 5, 6 ; Hashemi SM1, 7, 8
Authors
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Authors Affiliations
  1. 1. Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  2. 2. Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Basic and Molecular Epidemiology of Gastrointestinal Disorder Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Science, Tehran, Iran
  4. 4. International Hematology/Oncology of Pediatrics Experts, Universal Scientific Education and Research Network, Tehran University of Medical Sciences, Iran
  5. 5. Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Sheffield, United Kingdom
  7. 7. Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  8. 8. Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: Human Immunology Published:2019


Abstract

Severe congenital neutropenia (SCN) is described by the absolute neutrophil counts less than 500 cells/mm3, bacterial infections, and an arrest of neutrophil differentiation. So, effective strategies for improving the function and lifespan of the existing neutrophils in these patients are necessary. Mesenchymal stem cells (MSCs) have supportive effects on neutrophils. Recently, it was determined that MSCs exert their effects, mostly by secreting soluble factors and exosomes. So, in this study, neutrophils were isolated from the bloodstream of healthy donors and SCN patients and cultured with medium, MSC-exosomes or MSC-conditioned media (MSC-CM). Then, the effects of the two treatments on neutrophil respiratory burst, apoptosis and phagocytosis percentage were assessed using nitro blue tetrazolium (NBT) assay, annexin V-propidium iodide (PI) and Giemsa staining, respectively. Both treatments could significantly augment respiratory burst of neutrophils from SCN patients and healthy donors. But, only CM could significantly enhance phagocytosis index. About the lifespan of neutrophils, only exosomes could significantly enhance it in both groups. Based on these results, both exosomes and CM derived from MSCs could be attractive candidates for rescuing SCN patients from serious infections. © 2019 American Society for Histocompatibility and Immunogenetics
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