PMID- 23717008 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20130530 LR - 20211021 IS - 1013-9087 (Print) IS - 2005-3894 (Electronic) IS - 1013-9087 (Linking) VI - 25 IP - 2 DP - 2013 May TI - Potential Immunoinflammatory Role of Staphylococcal Enterotoxin A in Atopic Dermatitis: Immunohistopathological Analysis and in vitro Assay. PG - 173-80 LID - 10.5021/ad.2013.25.2.173 [doi] AB - BACKGROUND: The underlying mechanism of atopic dermatitis (AD) exacerbated by Staphylococcus aureus has not been established. However, we demonstrated recently that the majority of S. aureus strains colonized in the skin of Korean AD patients carried genes encoding staphylococcal enterotoxin A (SEA) and/or toxic shock syndrome toxin-1 (TSST-1). OBJECTIVE: To clarify the role of staphylococcal superantigen, SEA in AD. METHODS: With the lesional skin of 9 AD patients and normal looking skin of one healthy adult, we examined first the expression of SEA, staphylococcal enterotoxin B (SEB), and TSST-1 using immunohistochemical analysis. In addition, we investigated the effects of SEA on the expression of inflammation-related adhesion molecules and cytokines in human HaCaT keratinocytes and Human Umbilical Vein Endothelial Cells (HUVECs) by reverse transcriptase-polymerase chain reaction (RT-PCR) analysis and enzyme-linked immunosorbent assay. RESULTS: Staphylococcal protein A (SPA) and SEA were detected with increased immunoreactivity in AD patients. However, TSST-1 showed mild-to-moderate immunoreactivity in AD patients, whereas SEB was minimally detected. In the double immunofluorescence investigation, SEA and SPA were well co-localized. SEA induced upregulation of adhesion molecules and elicited inflammatory responses in HaCaT keratinocytes and HUVECs. CONCLUSION: This study demonstrates the importance of SEA as an immunoinflammatory triggering factor of AD in Koreans. FAU - Lee, Hee-Woo AU - Lee HW AD - Department of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Korea. FAU - Kim, Sung Min AU - Kim SM FAU - Kim, Jung Min AU - Kim JM FAU - Oh, Byung Min AU - Oh BM FAU - Kim, Jun Young AU - Kim JY FAU - Jung, Han Jin AU - Jung HJ FAU - Lim, Hyun Jung AU - Lim HJ FAU - Kim, Byung Soo AU - Kim BS FAU - Lee, Weon Ju AU - Lee WJ FAU - Lee, Seok-Jong AU - Lee SJ FAU - Kim, Do Won AU - Kim DW LA - eng PT - Journal Article DEP - 20130510 PL - Korea (South) TA - Ann Dermatol JT - Annals of dermatology JID - 8916577 PMC - PMC3662910 OTO - NOTNLM OT - Atopic dermatitis OT - Staphylococcal enterotoxin A OT - Staphylococcus aureus EDAT- 2013/05/30 06:00 MHDA- 2013/05/30 06:01 PMCR- 2013/05/01 CRDT- 2013/05/30 06:00 PHST- 2011/10/24 00:00 [received] PHST- 2012/01/26 00:00 [revised] PHST- 2012/02/21 00:00 [accepted] PHST- 2013/05/30 06:00 [entrez] PHST- 2013/05/30 06:00 [pubmed] PHST- 2013/05/30 06:01 [medline] PHST- 2013/05/01 00:00 [pmc-release] AID - 10.5021/ad.2013.25.2.173 [doi] PST - ppublish SO - Ann Dermatol. 2013 May;25(2):173-80. doi: 10.5021/ad.2013.25.2.173. Epub 2013 May 10.