PMID- 18050371 OWN - NLM STAT- MEDLINE DCOM- 20080228 LR - 20171116 IS - 0315-162X (Print) IS - 0315-162X (Linking) VI - 34 IP - 12 DP - 2007 Dec TI - The CD40/CD40 ligand system in the skin of patients with subacute cutaneous lupus erythematosus. PG - 2412-6 AB - OBJECTIVE: To investigate whether CD40 and CD40 ligand (CD40L) is expressed in the skin of patients with subacute cutaneous lupus erythematosus (SCLE). METHODS: Six female patients with SCLE were studied. Skin biopsies were obtained from lesional and healthy sunprotected skin. Frozen sections were stained immunohistochemically using monoclonal antibodies to CD4, CD40, and CD40L. As controls we used 5 patients with discoid LE (DLE), 5 with dermatomyositis (DM), 3 with lichen planus (LP), and 2 with erythema multiforme (EM), as well as the normal-appearing skin of 5 healthy volunteers. RESULTS: The CD40 was intensely expressed in all SCLE, DLE, and DM lesions, and only focally in healthy sunprotected skin specimens. The number of CD40+ cells in SCLE dermis was lower than in DLE, similar to that in DM, LP and EM, and higher than in SCLE sunprotected skin. CD40L+ cells infiltrated the SCLE, DLE, DM, LP, and EM lesional dermis, and were more numerous in SCLE lesional skin than in SCLE healthy sunprotected skin. CONCLUSION: We showed that the CD40/CD40L system may represent an important pathway of induction of SCLE lesions. The expression of such costimulatory system in healthy sunprotected skin also may signify that its abnormal activation is constitutive in SCLE, as previously observed in systemic LE. FAU - Caproni, Marzia AU - Caproni M AD - Department of Dermatological Sciences, University of Florence, Florence, Italy. FAU - Torchia, Daniele AU - Torchia D FAU - Antiga, Emiliano AU - Antiga E FAU - Giomi, Barbara AU - Giomi B FAU - Mercuri, Michele AU - Mercuri M FAU - Volpi, Walter AU - Volpi W FAU - Fabbri, Paolo AU - Fabbri P LA - eng PT - Journal Article DEP - 20071115 PL - Canada TA - J Rheumatol JT - The Journal of rheumatology JID - 7501984 RN - 0 (CD40 Antigens) RN - 147205-72-9 (CD40 Ligand) SB - IM MH - Adult MH - CD40 Antigens/biosynthesis/*immunology MH - CD40 Ligand/biosynthesis/*immunology MH - Case-Control Studies MH - Dermatomyositis/immunology MH - Erythema Multiforme/immunology MH - Female MH - Gene Expression MH - Humans MH - Immunohistochemistry MH - Lichen Planus/immunology MH - Lupus Erythematosus, Cutaneous/*immunology MH - Lupus Erythematosus, Discoid/immunology MH - Skin/*immunology EDAT- 2007/12/01 09:00 MHDA- 2008/02/29 09:00 CRDT- 2007/12/01 09:00 PHST- 2007/12/01 09:00 [pubmed] PHST- 2008/02/29 09:00 [medline] PHST- 2007/12/01 09:00 [entrez] AID - 07/13/1129 [pii] PST - ppublish SO - J Rheumatol. 2007 Dec;34(12):2412-6. Epub 2007 Nov 15.