PMID- 16433684 OWN - NLM STAT- MEDLINE DCOM- 20060327 LR - 20060125 IS - 0906-6705 (Print) IS - 0906-6705 (Linking) VI - 15 IP - 2 DP - 2006 Feb TI - Role of microchimerism in the pathogenesis of oral lichen planus. PG - 125-9 AB - OBJECTIVE: Microchimerism of persistent fetal cells has been implicated in some cell-mediated autoimmune diseases. This study examines the hypothesis that fetal microchimerism plays a role in the pathogenesis of lichen planus (LP) affecting the oral cavity. STUDY DESIGN: Mucosal biopsies of 12 women with oral LP (OLP) were tested for the presence of both male cells and male DNA originating from prior pregnancies or prior blood transfusions. Six male patients with OLP served as a control group. Biopsies were analyzed for the presence of Y-chromosome-positive cells by fluorescence in situ hybridization (FISH) with X- and Y-specific DNA probes. To confirm the FISH findings, we used fluorescent polymerase chain reaction (PCR) to identify Y-chromosome sequences in DNA extracted from mucosal lesions. RESULTS: Using FISH technology, all the 18 biopsy samples showed good hybridization results. In females, Y-chromosome-specific signals were not detected by FISH at any site of the lesions. PCR amplification demonstrated a single peak at the locus specific for the X-chromosome. CONCLUSION: Male DNA microchimerism was not present in any of the investigated lesions, suggesting that microchimerism because of persisting male fetal cells is unlikely to play a major role in the pathogenesis of OLP. FAU - Weger, W AU - Weger W AD - Department of Dermatology, Medical University of Graz, Austria. FAU - Bauer, M AU - Bauer M FAU - Odell, E AU - Odell E FAU - Pertl, B AU - Pertl B FAU - Cerroni, L AU - Cerroni L FAU - Kerl, H AU - Kerl H FAU - Jakse, N AU - Jakse N FAU - Pertl, C AU - Pertl C LA - eng PT - Journal Article PL - Denmark TA - Exp Dermatol JT - Experimental dermatology JID - 9301549 RN - 0 (DNA Probes) SB - IM MH - Adult MH - Aged MH - Base Sequence MH - Case-Control Studies MH - *Chimerism MH - Chromosomes, Human, X/genetics MH - Chromosomes, Human, Y/genetics MH - DNA Probes/genetics MH - Female MH - Fetomaternal Transfusion MH - Humans MH - In Situ Hybridization, Fluorescence MH - Lichen Planus, Oral/*etiology/genetics/immunology MH - Male MH - Middle Aged MH - Pregnancy EDAT- 2006/01/26 09:00 MHDA- 2006/03/28 09:00 CRDT- 2006/01/26 09:00 PHST- 2006/01/26 09:00 [pubmed] PHST- 2006/03/28 09:00 [medline] PHST- 2006/01/26 09:00 [entrez] AID - EXD393 [pii] AID - 10.1111/j.1600-0625.2006.00393.x [doi] PST - ppublish SO - Exp Dermatol. 2006 Feb;15(2):125-9. doi: 10.1111/j.1600-0625.2006.00393.x.