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Open AccessJournal ArticleDOI

Mutations involved in Aicardi-Goutières syndrome implicate SAMHD1 as regulator of the innate immune response.

Gillian I. Rice, +50 more
- 14 Jun 2009 - 
- Vol. 41, Iss: 7, pp 829-832
TLDR
Mutations in SAMHD1 are described as the cause of Aicardi-Goutières syndrome at the AGS5 locus and data is presented to show that SAM HD1 may act as a negative regulator of the cell-intrinsic antiviral response.
Abstract
Aicardi-Goutieres syndrome is a mendelian mimic of congenital infection and also shows overlap with systemic lupus erythematosus at both a clinical and biochemical level The recent identification of mutations in TREX1 and genes encoding the RNASEH2 complex and studies of the function of TREX1 in DNA metabolism have defined a previously unknown mechanism for the initiation of autoimmunity by interferon-stimulatory nucleic acid Here we describe mutations in SAMHD1 as the cause of AGS at the AGS5 locus and present data to show that SAMHD1 may act as a negative regulator of the cell-intrinsic antiviral response

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Citations
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A census of human RNA-binding proteins.

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SAMHD1 is the dendritic- and myeloid-cell-specific HIV-1 restriction factor counteracted by Vpx

TL;DR: It is demonstrated that SAMHD1 is an antiretroviral protein expressed in cells of the myeloid lineage that inhibits an early step of the viral life cycle, and is probably required for HIV-1 restriction.
References
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Journal ArticleDOI

Trex1 Prevents Cell-Intrinsic Initiation of Autoimmunity

TL;DR: It is shown that single-stranded DNA derived from endogenous retroelements accumulates in Trex1-deficient cells, and thatTrex1 can metabolize reverse-transcribed DNA, and suggest an unanticipated contribution of endogenous Retroelements to autoimmunity.
Journal ArticleDOI

Mutations in genes encoding ribonuclease H2 subunits cause Aicardi-Goutières syndrome and mimic congenital viral brain infection.

TL;DR: It is shown that AGS can result from mutations in the genes encoding any one of its three subunits, demonstrating a role for ribonuclease H in human neurological disease and suggesting an unanticipated relationship between ribonUClease H2 and the antiviral immune response that warrants further investigation.
Journal ArticleDOI

Trex1 Exonuclease Degrades ssDNA to Prevent Chronic Checkpoint Activation and Autoimmune Disease

TL;DR: It is reported that Trex1, ordinarily associated with the endoplasmic reticulum (ER), relocalizes to the S phase nucleus after gamma irradiation or hydroxyurea treatment and acts on a single-stranded DNA polynucleotide species generated from processing of aberrant replication intermediates to attenuate DNA damage checkpoint signaling and prevent pathological immune activation.
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