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Human cytomegalovirus induces apoptosis in the hematopoietic cell line MO7e

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Several studies have shown that human cytomegalovirus (HCMV) induces growth suppression of hematopoietic progenitors. In vitro studies have demonstrated that the HCMV-induced suppression is independent of viral protein production. Previous studies have indicated a link between HCMV infection and apoptosis in human cells. The purpose of our study was to investigate whether the observed inhibitory effect of HCMV on the human myeloid progenitors could be connected to the induction of apoptosis. The growth and cell death of the hematopoietic cell line MO7e was investigated following infection with HCMV virions and dense bodies. Both virions and dense bodies inhibited the growth of MO7e cells, and induced cell death measured by trypan blue staining. In addition, both HCMV virions and dense bodies caused an increased amount of apoptosis-characteristic DNA fragmentation in the MO7e cells compared to mock-treated cells. The HCMV virions were also able to induce an increased expression of phosphatidylserine on the cell surface, which is an early event in the initiation of apoptosis in most cell types. In conclusion, HCMV and HCMV dense bodies are able to induce apoptosis in the myeloid progenitor cell line MO7e
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Keywords: Human cytomegalovirus; apoptosis; hematopoietic cell line

Document Type: Original Article

Affiliations: 1: Institute of Microbiology, and 2: Department of Pediatric Research, The National Hospital, Oslo, Norway

Publication date: 2000-03-01

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