Inhibitory effect of hexamethylene bisacetamide on replication of human cytomegalovirus

Inhibitory effect of hexamethylene bisacetamide on replication of human cytomegalovirus The effect of hexamethylane bisacetamide (HMBA), a hybrid polar compound, on gene expression and replication of human cytomegalovirus (HCMV) was studied. When HCMV-infected human thyroid papillary carcinoma (TPC-1) and human embryonic lung (HEL) fibroblast cells were maintained with medium containing 2.5 and 5 mM HMBA for 10 days, there was a greater than 2- to 3-log reduction in virus yield compared to that in untreated cells. Infection of TPC-1 cells with HCMV resulted in an establishment of persistent infection and the cells continuously produced virus with titer of over 10 5 PFU/ml, whereas HMBA prevented the infected cells from entering into the persistent infection. Moreover, treatment of the persistently infected cultures with HMBA reduced production of infectious HCMV more efficiently than did ganciclovir, and eventually ceased HCMV production. Western blotting analysis revealed that HMBA blocks accumulation of the immediate early 2 (IE2) protein in TPC-1 cells and delays synthesis of this protein in HEL cells, but has little effect on the level of the IE1 protein during the early times after infection. Synthesis of the viral early and late proteins in both cells was also substantially blocked by HMBA. The results indicate that the inhibition or the delay of the critical IE2 protein synthesis in the presence of HMBA would actually be a process that fails to proceed beyond the IE stages in HCMV replication cycle. Archives of Virology Springer Journals

Inhibitory effect of hexamethylene bisacetamide on replication of human cytomegalovirus

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Copyright © 2005 by Springer-Verlag/Wien
Biomedicine; Medical Microbiology; Infectious Diseases; Virology
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