scholarly journals 329. Functional Mapping of Tissue Tropism of Naturally Occurring Adeno-Associated Virus Isolates from Human Hematopoietic Stem Cells

2011 ◽  
Vol 19 ◽  
pp. S127-S128 ◽  
2008 ◽  
Vol 19 (3) ◽  
pp. 267-278 ◽  
Author(s):  
Zongchao Han ◽  
Li Zhong ◽  
Njeri Maina ◽  
Zhongbo Hu ◽  
Xiaomiao Li ◽  
...  

2020 ◽  
Author(s):  
Purwati Sumorejo ◽  
Disca Sandyakala Purnama ◽  
Andang Miatmoko ◽  
Nasronudin Nasronudin ◽  
Aristika Dinaryanti ◽  
...  

Abstract Background: The prevalence of COVID-19 cases in Indonesia until June 9th 2020, Government has confirmed the number of 32.076 positive cases from 34 provinces in Indonesia with 1.923 fatalities. Along with the development of technology, stem cell-based biological medical therapy, and stem cell-based immunotherapy were developed to find out its potential in the case of COVID-19 treatment besides using chemical drugs as a therapy.Methods: In this study, in vitro research will be conducted to determine the potential of hematopoietic stem cells (HSC) against SARS-CoV-2 (COVID-19) viruses with virus isolates from Indonesia. The SARS-CoV-2 virus was planted in rat kidney cells and Vero cells, then cells that had been planted with the virus were given HSC cells and then evaluated at 24, 48, and 72 hours. The evaluation is done by collecting cells and supernatant from the cell plate and then evaluating the viral load using a Polymerase Chain Reaction (PCR) machine.Results: The results showed that the addition of HSC on cells that had been infected by SARS-CoV-2 decrease in viral load within 24 to 72 hours in all variations of Multiples of Infection (MoI) values.Conclusions: The administration of HSC cells has the potential to eliminate SARS-CoV-2 virus. Although this research is an in vitro study, this study could be the basis for the development of alternative stem cell-based therapies to handle COVID-19 cases in Indonesia.


2017 ◽  
Vol 214 (7) ◽  
pp. 2023-2040 ◽  
Author(s):  
Christelle Freitas ◽  
Monika Wittner ◽  
Julie Nguyen ◽  
Vincent Rondeau ◽  
Vincent Biajoux ◽  
...  

The CXCL12/CXCR4 signaling exerts a dominant role in promoting hematopoietic stem and progenitor cell (HSPC) retention and quiescence in bone marrow. Gain-of-function CXCR4 mutations that affect homologous desensitization of the receptor have been reported in the WHIM Syndrome (WS), a rare immunodeficiency characterized by lymphopenia. The mechanisms underpinning this remain obscure. Using a mouse model with a naturally occurring WS-linked gain-of-function Cxcr4 mutation, we explored the possibility that the lymphopenia in WS arises from defects at the HSPC level. We reported that Cxcr4 desensitization is required for quiescence/cycling balance of murine short-term hematopoietic stem cells and their differentiation into multipotent and downstream lymphoid-biased progenitors. Alteration in Cxcr4 desensitization resulted in decrease of circulating HSPCs in five patients with WS. This was also evidenced in WS mice and mirrored by accumulation of HSPCs in the spleen, where we observed enhanced extramedullary hematopoiesis. Therefore, efficient Cxcr4 desensitization is critical for lymphoid differentiation of HSPCs, and its impairment is a key mechanism underpinning the lymphopenia observed in mice and likely in WS patients.


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