PMID- 16374466 OWN - NLM STAT- MEDLINE DCOM- 20060307 LR - 20171116 IS - 0022-202X (Print) IS - 0022-202X (Linking) VI - 126 IP - 2 DP - 2006 Feb TI - Presence of chimeric maternally derived keratinocytes in cutaneous inflammatory diseases of children: the example of pityriasis lichenoides. PG - 345-8 AB - During pregnancy, maternal cells may enter the fetal circulation and persist until adulthood. The fate of these cells remains unknown. As unexplained T-cell-mediated conditions such as pityriasis lichenoides (PL) may occur in children, we aimed at identifying maternal cells in lesional skin of PL and controls. Archived skin biopsy specimens from young males with PL, atopic dermatitis, or normal skin were scanned for the presence of female (presumably maternal) cells using fluorescence in situ hybridization (FISH) with X and Y chromosome-specific probes. Phenotyping of maternal cells relied on FISH combined with anti-CD45, anti-CD1a, or anti-cytokeratin labelling, identifying leukocytes, Langerhans cells, and keratinocytes, respectively. Maternal cells were found in PL (11/12) and controls (4/7), but their average frequency was higher in PL: 99 per million cells as compared to 5 per million cells in controls (P = 0.005). In the epidermis, the maternal microchimeric cells were labelled by anti-cytokeratin in all cases. We identified maternally derived keratinocytes in the skin of male children with inflammatory skin disorders. These cells may either help repair the damaged skin or home initially in the skin and trigger a host (child) versus graft (mother) disease. FAU - Khosrotehrani, Kiarash AU - Khosrotehrani K AD - Service de dermatologie, Hopital Tenon, Paris, France. FAU - Guegan, Sarah AU - Guegan S FAU - Fraitag, Sylvie AU - Fraitag S FAU - Oster, Michele AU - Oster M FAU - de Prost, Yves AU - de Prost Y FAU - Bodemer, Christine AU - Bodemer C FAU - Aractingi, Selim AU - Aractingi S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Invest Dermatol JT - The Journal of investigative dermatology JID - 0426720 RN - 0 (Antigens, CD1) RN - 0 (CD1a antigen) RN - 68238-35-7 (Keratins) RN - EC 3.1.3.48 (Leukocyte Common Antigens) SB - IM CIN - J Invest Dermatol. 2006 Feb;126(2):239-41. PMID: 16418731 MH - Antigens, CD1/analysis MH - Child MH - Child, Preschool MH - *Chimera MH - Chimerism MH - Dermatitis, Atopic/genetics/*pathology MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Keratinocytes/chemistry/*pathology MH - Keratins/analysis MH - Leukocyte Common Antigens/analysis MH - Male MH - *Maternal-Fetal Exchange MH - Pityriasis Lichenoides/genetics/*pathology MH - Pregnancy EDAT- 2005/12/24 09:00 MHDA- 2006/03/08 09:00 CRDT- 2005/12/24 09:00 PHST- 2005/12/24 09:00 [pubmed] PHST- 2006/03/08 09:00 [medline] PHST- 2005/12/24 09:00 [entrez] AID - S0022-202X(15)32747-0 [pii] AID - 10.1038/sj.jid.5700060 [doi] PST - ppublish SO - J Invest Dermatol. 2006 Feb;126(2):345-8. doi: 10.1038/sj.jid.5700060.