{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T21:18:26Z","timestamp":1790630306788,"version":"4.1.0"},"reference-count":63,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2021,11,1]],"date-time":"2021-11-01T00:00:00Z","timestamp":1635724800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":["www.atsjournals.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Ozone (O3) is a prevalent air pollutant causing lung inflammation. Previous studies demonstrate that O3 oxidizes lipids, such as cholesterol, in the airway to produce oxysterols, such as secosterol A (SecoA), which are electrophiles that are capable of forming covalent linkages preferentially with lysine residues and that consequently modify protein function. The breadth of proteins modified by this oxysterol as well as the biological consequences in the lung are unknown. By using an alkynyl-tagged form of SecoA and shotgun proteomics, we identified 135 proteins as being modified in bronchial epithelial cells. Among them was NLRP2 (NLR family pyrin domain\u2013containing protein 2), which forms an alkynyl-tagged SecoA\u2013protein adduct at lysine residue 1019 (K1019) in the terminal leucine-rich repeat region, a known regulatory region for NLR proteins. NLRP2 expression in airway epithelial cells was characterized, and CRISPR-Cas9 knockout (KO) and shRNA knockdown of NLRP2 were used to determine its function in O3-induced inflammation. No evidence for NLPR2 inflammasome formation or an NLRP2-dependent increase in caspase-1 activity in response to O3 was observed. O3-induced proinflammatory gene expression for CXCL2 and CXCL8\/IL8 was further enhanced in NLRP2-KO cells, suggesting a negative regulatory role. Reconstitution of NLRP2-KO cells with the NLRP2 K1019 mutated to arginine partially blocked SecoA adduction and enhanced O3-induced IL-8 release as compared with wild-type NLRP2. Together, our findings uncover NLRP2 as a highly abundant, key component of proinflammatory signaling pathways in airway epithelial cells and as a novel mediator of O3-induced inflammation.<\/jats:p>","DOI":"10.1165\/rcmb.2021-0032oc","type":"journal-article","created":{"date-parts":[[2021,6,14]],"date-time":"2021-06-14T20:00:35Z","timestamp":1623700835000},"page":"500-512","update-policy":"https:\/\/doi.org\/10.1164\/crossmarkpolicies","source":"Crossref","is-referenced-by-count":15,"title":["Oxysterols Modify NLRP2 in Epithelial Cells, Identifying a Mediator of Ozone-induced Inflammation"],"prefix":"10.1093","volume":"65","author":[{"given":"Alexia","family":"Perryman","sequence":"first","affiliation":[{"name":"Center for Environmental Medicine, Asthma, and Lung Biology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adam M.","family":"Speen","sequence":"additional","affiliation":[{"name":"Center for Environmental Medicine, Asthma, and Lung 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