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JPTM > Volume 44(6); 2010 > Article
The Korean Journal of Pathology 2010;44(6): 581-588.
doi: https://doi.org/10.4132/KoreanJPathol.2010.44.6.581
Distribution of Dendritic Cells and Regulatory T-Cells in Cutaneous Lymphomas.
Changyoung Yoo, Young Seon Hong, Baik Kee Cho, Sang Ho Kim, Sang In Shim, Chang Suk Kang
1Department of Hospital Pathology, St. Vincent's Hospital, Suwon, Korea.
2Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
3Department of Dermatology, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
4Department of Pathology, Songeui Campus, The Catholic University of Korea College of Medicine, Seoul, Korea.
5Department of Hospital Pathology, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea. cskang@catholic.ac.kr
ABSTRACT
BACKGROUND: Dendritic cells (DCs) play an important role in immune reactions. This study was designed to identify the distribution patterns of DCs and regulatory T-cells (Tregs) in cutaneous lymphomas. METHODS: Immunohistochemistry was used to determine langerin expression on Langerhans cells, CD11b on inflammatory DCs, CD209 and CD11c on dermal DCs, CD303 on plasmacytic DCs, and Foxp3 on Tregs in 81 cases of cutaneous lymphomas. RESULTS: Various DCs and Tregs were identified in most cutaneous lymphomas. Plasmacytic DCs, inflammatory DCs and Tregs were identified mainly in tumor areas, whereas dermal DCs were distributed both in the tumor and stromal areas. Among DCs, dermal DCs were most prominently identified in the cutaneous lymphomas not only in the tumor area but also in the stroma. The intense stromal infiltration of dermal DCs was consistent finding in T-cell lymphomas. Diffuse large B-cell lymphoma (DLBCL), not otherwise specified also showed intense stromal infiltration of dermal DCs, but stromal infiltration in DLBCL, leg type was relatively scant. CONCLUSIONS: The results suggest that all types of DCs and Tregs are involved in cutaneous lymphoma tumor immunity. Among them dermal DCs may play a dominant role.
Key Words: Dendritic cells; T-Lymphocytes, regulatory; Lymphomas, cutaneous