ArticleRetrovirology2012
SAMHD1 restricts HIV-1 infection in dendritic cells (DCs) by dNTP depletion, but its expression in DCs and primary CD4+ T-lymphocytes cannot be upregulated by interferons.
Article in Retrovirology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 143 papers.
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Who cites it
143 citing papers in PubMed, 192 citations in OpenAlex.
- Host factor SAMHD1 restricts DNA viruses in non-dividing myeloid cells.PLoS pathogens · 2013Trial
- HIV-1 derived oligonucleotides induce a type I IFN/STING dependent immune suppression reversible by targeting IFNARI.PLoS pathogens · 2026Article
- Hepatocyte SAMHD1 Deficiency Attenuates Hepatic Steatosis via Suppression of SREBP Activation in a Mouse Model of Metabolic-Associated Steatotic Liver Disease.International journal of biological sciences · 2026Article
- Single-base mJournal of virology · 2025Article
- Mammalian innate antiviral defenses: beyond interferon.Journal of virology · 2025Review
- Dendritic cells and HIV transmission: roles and subsets of antigen-presenting cells in the human anogenital tract.PLoS pathogens · 2025Review
- A novel aptamer-based dNTP assay reveals that intact HIV virions are highly stable and do not contain enough dNTPs to support DNA synthesis.Journal of virology · 2025Article
- Blockade ofmBio · 2025Article
- SAMHD1 enhances HIV-1-induced apoptosis in monocytic cells via the mitochondrial pathway.mBio · 2025Article
- dNTP depletion and beyond: the multifaceted nature of SAMHD1-mediated viral restriction.Journal of virology · 2025Review
- Nuclear Overexpression of SAMHD1 Induces M Phase Stalling in Hepatoma Cells and Suppresses HCC Progression by Interacting with the Cohesin Complex.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- SAMHD1 shapes deoxynucleotide triphosphate homeostasis by interconnecting the depletion and biosynthesis of different dNTPs.Nature communications · 2025Article
- Involvement of Human Cellular Proteins and Structures in Realization of the HIV Life Cycle: A Comprehensive Review, 2024.Viruses · 2024Review
- Human papillomavirus 16 replication converts SAMHD1 into a homologous recombination factor and promotes its recruitment to replicating viral DNA.Journal of virology · 2024Article
- Article
- Platform-directed allostery and quaternary structure dynamics of SAMHD1 catalysis.Nature communications · 2024Article
- Review
- Interactions between HIV proteins and host restriction factors: implications for potential therapeutic intervention in HIV infection.Frontiers in immunology · 2024Review
- Human lysyl-tRNA synthetase phosphorylation promotes HIV-1 proviral DNA transcription.Nucleic acids research · 2023Article
- Nucleoside Analog 2',3'-Isopropylidene-5-Iodouridine as Novel Efficient Inhibitor of HIV-1.Pharmaceutics · 2023Article
83 more citing papers are in PubMed but not listed here.
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundSAMHD1 is an HIV-1 restriction factor in non-dividing monocytes, dendritic cells (DCs), macrophages, and resting CD4+ T-cells. Acting as a deoxynucleoside triphosphate (dNTP) triphosphohydrolase, SAMHD1 hydrolyzes dNTPs and restricts HIV-1 infection in macrophages and resting CD4+ T-cells by decreasing the intracellular dNTP pool. However, the intracellular dNTP pool in DCs and its regulation by SAMHD1 remain unclear. SAMHD1 has been reported as a type I interferon (IFN)-inducible protein, but whether type I IFNs upregulate SAMHD1 expression in primary DCs and CD4+ T-lymphocytes is unknown.
resultsHere, we report that SAMHD1 significantly blocked single-cycle and replication-competent HIV-1 infection of DCs by decreasing the intracellular dNTP pool and thereby limiting the accumulation of HIV-1 late reverse transcription products. Type I IFN treatment did not upregulate endogenous SAMHD1 expression in primary DCs or CD4+ T-lymphocytes, but did in HEK 293T and HeLa cell lines. When SAMHD1 was over-expressed in these two cell lines to achieve higher levels than that in DCs, no HIV-1 restriction was observed despite partially reducing the intracellular dNTP pool.
conclusionsOur results suggest that SAMHD1-mediated reduction of the intracellular dNTP pool in DCs is a common mechanism of HIV-1 restriction in myeloid cells. Endogenous expression of SAMHD1 in primary DCs or CD4+ T-lymphocytes is not upregulated by type I IFNs.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.