Host factor SAMHD1 restricts DNA viruses in non-dividing myeloid cells.
Host factor SAMHD1 restricts DNA viruses in non-dividing myeloid cells.
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DOI:
10.1371/journal.ppat.1003481
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发表时间:
2013
期刊:
影响因子:
6.7
通讯作者:
Kim B
中科院分区:
文献类型:
--
作者:
Hollenbaugh JA;Gee P;Baker J;Daly MB;Amie SM;Tate J;Kasai N;Kanemura Y;Kim DH;Ward BM;Koyanagi Y;Kim B
SAMHD1 is a newly identified anti-HIV host factor that has a dNTP triphosphohydrolase activity and depletes intracellular dNTP pools in non-dividing myeloid cells. Since DNA viruses utilize cellular dNTPs, we investigated whether SAMHD1 limits the replication of DNA viruses in non-dividing myeloid target cells. Indeed, two double stranded DNA viruses, vaccinia and herpes simplex virus type 1, are subject to SAMHD1 restriction in non-dividing target cells in a dNTP dependent manner. Using a thymidine kinase deficient strain of vaccinia virus, we demonstrate a greater restriction of viral replication in non-dividing cells expressing SAMHD1. Therefore, this study suggests that SAMHD1 is a potential innate anti-viral player that suppresses the replication of a wide range of DNA viruses, as well as retroviruses, which infect non-dividing myeloid cells. Various viral pathogens such as HIV-1, herpes simplex virus (HSV) and vaccinia virus infect terminally-differentiated/non-dividing macrophages during the course of viral pathogenesis. Unlike dividing cells, non-dividing cells lack chromosomal DNA replication, do not enter the cell cycle, and harbor very low levels of cellular dNTPs, which are substrates of viral DNA polymerases. A series of recent studies revealed that the host protein SAMHD1 is dNTP triphosphohydrolase, which contributes to the poor dNTP abundance in non-dividing myeloid cells, and restricts proviral DNA synthesis of HIV-1 and other lentiviruses in macrophages, dendritic cells, and resting T cells. In this report, we demonstrate that SAMHD1 also controls the replication of large dsDNA viruses: vaccinia virus and HSV-1, in primary human monocyte-derived macrophages. SAMHD1 suppresses the replication of these DNA viruses to an even greater extent in the absence of viral genes that are involved in dNTP metabolism such as thymidine kinase. Therefore, this study supports that dsDNA viruses evolved to express enzymes necessary to increase the levels of dNTPs as a mechanism to overcome the restriction induced by SAMHD1 in myeloid cells.
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影响因子:
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作者:
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通讯作者:
Landau, N. R.
影响因子:
82.9
作者:
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影响因子:
64.8
作者:
BULLER, RML;SMITH, GL;MOSS, B
通讯作者:
MOSS, B
影响因子:
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作者:
Goldstone, David C.;Ennis-Adeniran, Valerie;Webb, Michelle
通讯作者:
Webb, Michelle
DOI:
10.2174/1874091x00701010033
发表时间:
2007-12-04
期刊:
The open biochemistry journal
影响因子:
--
作者:
Brown, Jay C
通讯作者:
Brown, Jay C