Pityriasis lichenoides et varioliformis acuta and pityriasis lichenoides chronica: comparison of lesional T-cell subsets and investigation of viral associations
- Authors
- Kim, Jeong Eun; Yun, Woo Jin; Mun, Seog-Kyun; Yoon, Ghil Suk; Huh, Jooryung; Choi, Jee Ho; Chang, Sungeun
- Issue Date
- Aug-2011
- Publisher
- WILEY-BLACKWELL
- Keywords
- FOXP3; human herpesvirus-8 (HHV-8); pityriasis lichenoides; regulatory T-cells (T-reg)
- Citation
- JOURNAL OF CUTANEOUS PATHOLOGY, v.38, no.8, pp 649 - 656
- Pages
- 8
- Journal Title
- JOURNAL OF CUTANEOUS PATHOLOGY
- Volume
- 38
- Number
- 8
- Start Page
- 649
- End Page
- 656
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/21351
- DOI
- 10.1111/j.1600-0560.2011.01717.x
- ISSN
- 0303-6987
1600-0560
- Abstract
- Background: Pityriasis lichenoides (PL) exhibits a broad clinical spectrum that includes both acute and chronic forms. The precise biologic mechanisms underlying PL remain unclear. Objectives: To evaluate the immunohistochemical characteristics of PL and to investigate lesional T-cell subsets and the possible role of viral infection in its pathogenesis. Patients and methods: Samples from 10 patients with PL et varioliformis acuta (PLEVA) and 13 with PL chronica (PLC) were analyzed immunohistochemically. Epstein-Barr virus early regions were assayed by in situ hybridization and T-cell receptor-gamma (TCR-gamma) gene rearrangements were assayed by polymerase chain reaction (PCR). We also utilized PCR to assay for human herpesvirus-8 (HHV-8) DNA in 51 patients with PL and in 25 controls. Results: Lymphocytes expressing CD8 and T-cell intracellular antigen-1 were more abundant in patients with PLEVA than with PLC, whereas CD4+ lymphocytes and FOXP3-positive regulatory T-cells were more abundant in PLC. HHV-8 DNA was present in 11 of 51 (21.6%) PL patients and 0 of 25 controls. A clonal TCR-gamma gene rearrangement was observed in only one patient with PLEVA. Conclusions: Our data suggests that PL may represent an inflammatory condition induced by various triggering agents, such as HHV-8, rather than a lymphoproliferative disorder. PLEVA, characterized by an acute course with severe symptoms, may indicate a relative lack of regulatory T-cells in comparison with PLC.
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