KMID : 0613820150250060686
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Journal of Life Science 2015 Volume.25 No. 6 p.686 ~ p.692
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The Distribution of CD8- and Foxp3-positive T Cells in Skin Squamous Cell Tumors and Basal Cell Carcinomas
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Jang Suk-Yong
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Abstract
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Cancer is subject to dynamic interactions between contrary immune reactions that drive both tumor growth and suppression. Forkhead box p3 positive T cells (Foxp3 positive T cells) might support tumor promotion, while CD8 positive T cells might protect the host. The present study examined the distributions of CD8- and Foxp3-positive T cells and CD8 positive T cells/ Foxp3 positive T cells ratio in skin squamous cell carcinoma (SCC) and its precancerous lesions; it also compared this with data for basal cell carcinoma (BCC). Iimmunohistochemical staining for CD8 and Foxp3 was conducted in 20 cases of SCC, Bowen¡¯s disease (BD), actinic keratosis (AK) and BCC. The BD and SCC cases exhibited significantly increased numbers of both CD8- and Foxp3-positive T cells in their advancing regions compared with the AK and BCC cases, and the BD cases exhibited significantly lower CD8 positive T cells / Foxp3 positive T cells ratio in these regions than did the AK and BCC cases. There was no significant difference in both T cells and the ratio between BD and SCC. The degree of both T cells infiltration differed between the advancing and central areas in SCC and BCC. Immune microenvironments differ between cutaneous squamous cell tumors and BCC and differ as well among tumor compartments.
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KEYWORD
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Basal cell carcinoma, CD8 positive T cell, Foxp3 positive T cell, skin squamous cell carcinoma
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