PMID- 33805042 OWN - NLM STAT- MEDLINE DCOM- 20210609 LR - 20210609 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 7 DP - 2021 Mar 24 TI - Transient Receptor Potential Ankyrin 1 (TRPA1)-An Inflammation-Induced Factor in Human HaCaT Keratinocytes. LID - 10.3390/ijms22073322 [doi] LID - 3322 AB - Transient receptor potential ankyrin 1 (TRPA1) is an ion channel mainly studied in sensory neurons where it mediates itch, pain and neurogenic inflammation. Recently, some nonneuronal cells have also been shown to express TRPA1 to support inflammatory responses. To address the role of TRPA1 in skin inflammation, we aimed to investigate TRPA1 expression in keratinocytes. HaCaT cells (a model of human keratinocytes) and skin biopses from wild-type and TRPA1 deficient mice were used in the studies. TRPA1 expression in nonstimulated keratinocytes was very low but significantly inducible by the proinflammatory cytokine tumor necrosis factor (TNF) in an nuclear factor kappa B (NF-kappaB), and mitogen-activated protein (MAP) kinase (p38 and c-Jun N-terminal kinase, JNK)-dependent manner. Interestingly, drugs widely used to treat skin inflammation, the calcineurin inhibitors tacrolimus and cyclosporine and the glucocorticoid dexamethasone, significantly decreased TRPA1 expression. Furthermore, pharmacological inhibition and genetic deletion of TRPA1 reduced the synthesis of TNF-induced monocyte chemoattractant protein 1 (MCP-1) in keratinocytes and mouse skin biopsies. In conclusion, these findings point to an inflammatory role for TRPA1 in keratinocytes and present TRPA1 as a potential drug target in inflammatory skin diseases. FAU - Luostarinen, Samu AU - Luostarinen S AD - The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland. FAU - Hamalainen, Mari AU - Hamalainen M AD - The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland. FAU - Moilanen, Eeva AU - Moilanen E AUID- ORCID: 0000-0002-8577-0316 AD - The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland. LA - eng GR - Academy of Finland/ GR - Research Foundation 300 of Rheumatic Diseases, Finland/ GR - Tampere Tuberculosis Foundation/ GR - Competitive State Research Financing of the Expert Responsibility Area of Tampere University Hospital/ PT - Journal Article DEP - 20210324 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (CCL2 protein, human) RN - 0 (Calcineurin Inhibitors) RN - 0 (Ccl2 protein, mouse) RN - 0 (Chemokine CCL2) RN - 0 (Glucocorticoids) RN - 0 (NF-kappa B) RN - 0 (TRPA1 Cation Channel) RN - 0 (TRPA1 protein, human) RN - 0 (Trpa1 protein, mouse) SB - IM MH - Animals MH - Biopsy MH - Calcineurin Inhibitors/pharmacology MH - Chemokine CCL2/metabolism MH - Female MH - Glucocorticoids/metabolism MH - HEK293 Cells MH - HaCaT Cells MH - Humans MH - Inflammation MH - Keratinocytes/*metabolism MH - MAP Kinase Signaling System MH - Mice MH - Mice, Knockout MH - NF-kappa B/metabolism MH - Skin/*metabolism/pathology MH - TRPA1 Cation Channel/*metabolism PMC - PMC8037497 OTO - NOTNLM OT - calcineurin inhibitors OT - glucocorticoids OT - inflammation OT - transient receptor potential ankyrin 1 (TRPA1) cation channel OT - tumor necrosis factor (TNF) COIS- The authors declare no conflict of interest. EDAT- 2021/04/04 06:00 MHDA- 2021/06/10 06:00 PMCR- 2021/03/24 CRDT- 2021/04/03 01:19 PHST- 2021/02/08 00:00 [received] PHST- 2021/03/10 00:00 [revised] PHST- 2021/03/17 00:00 [accepted] PHST- 2021/04/03 01:19 [entrez] PHST- 2021/04/04 06:00 [pubmed] PHST- 2021/06/10 06:00 [medline] PHST- 2021/03/24 00:00 [pmc-release] AID - ijms22073322 [pii] AID - ijms-22-03322 [pii] AID - 10.3390/ijms22073322 [doi] PST - epublish SO - Int J Mol Sci. 2021 Mar 24;22(7):3322. doi: 10.3390/ijms22073322.