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PYCARD

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PYCARD

A gene on chromosome 16p11.2 that encodes an adaptor protein  composed of two protein–protein interaction domains: an N-terminal PYRIN-PAAD-DAPIN domain (PYD) and a C-terminal caspase-recruitment domain (CARD), both of which belong to the six-helix bundle death domain-fold superfamily. This superfamily mediates assembly of large signalling complexes in the inflammatory and apoptotic-signalling pathways by activating caspase. In normal cells, PYCARD localises to the cytoplasm, but in cells undergoing apoptosis it forms ball-like aggregates near the nucleus.
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In the peritonitis mouse model (Table 2), PYCARD, IL-6, and lectin-like oxidized-LDL receptor-1 (LOX-1) were significantly upregulated in epididymal and in subcutaneous adipose tissue at all time points, whereas MCP-1 was induced only in epididymal but not in subcutaneous adipose tissue.
In the present study, we could demonstrate a shift in secretion profile from anti-inflammatory adipokines/cytokines such as adiponectin towards proinflammatory adipokines/cytokines such as visfatin, leptin, IL-6, PYCaRd, and MCP-1.
The following primary antibodies were used: WNV (Envelope protein; Abcam, Cambridge, MA), Iba-1 (Wako Chemicals, Richmond, VA), CD3 and Mac-3 (BD Biosciences, San Jose, CA), Fas (X-20, Santa Cruz Biotechnology, Dallas, TX), caspase 3 (Asp175, clone 5A1E, Cell Signaling, Danvers, MA), and PYCARD ASC-speck (MyBiosource, San Diego, CA).
Transcription of other inflammasome components, the NLR family pyrin domain containing 3 (NLRP3) and PYD and CARD domain containing (PYCARD) proteins, was significantly upregulated in OPN KO animals, on day 5 pi compared to baseline (p values = 0.02 and 0.024, resp.) (Figures 5(b) and 5(d)).
The inflammasome is a multiprotein oligomer consisting of caspase-1, PYCARD, and NALP that mediate the response to cellular danger signals activating and recruiting inflammatory cells.
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