Abstract
The mammalian innate immune system is activated by foreign nucleic acids. Detection of double- stranded DNA ( dsDNA) in the cytoplasm triggers characteristic antiviral responses and macrophage cell death. Cytoplasmic dsDNA rapidly activated caspase 3 and caspase 1 in bone marrow- derived macrophages. We identified the HIN- 200 family member and candidate lupus susceptibility factor, p202, as a dsDNA binding protein that bound stably and rapidly to transfected DNA. Knockdown studies showed p202 to be an inhibitor of DNA- induced caspase activation. Conversely, the related pyrin domain- containing HIN- 200 factor, AIM2 ( p210), was required for caspase activation by cytoplasmic dsDNA. This work indicates that HIN- 200 proteins can act as pattern recognition receptors mediating responses to cytoplasmic dsDNA.
Original language | English |
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Pages (from-to) | 1057-1060 |
Number of pages | 4 |
Journal | Science |
Volume | 323 |
Issue number | 5917 |
DOIs | |
Publication status | Published - 20 Feb 2009 |
Keywords / Materials (for Non-textual outputs)
- INNATE IMMUNE-RESPONSE
- CELL-DEATH
- FAMILY
- GENE
- MACROPHAGES
- RECOGNITION
- INFECTION
- SIGNALS
- DOMAIN
- LUPUS