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Erschienen in: Cancer Immunology, Immunotherapy 7/2011

01.07.2011 | Original article

Enhanced programmed death 1 (PD-1) and PD-1 ligand (PD-L1) expression in patients with actinic cheilitis and oral squamous cell carcinoma

verfasst von: Tatiana Salles de Souza Malaspina, Thaís Helena Gasparoto, Maria Renata Sales Nogueira Costa, Edgard Franco de Melo Jr, Maura Rosane Valério Ikoma, José Humberto Damante, Karen Angélica Cavassani, Gustavo Pompermaier Garlet, João Santana da Silva, Ana Paula Campanelli

Erschienen in: Cancer Immunology, Immunotherapy | Ausgabe 7/2011

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Abstract

PD-1 and PD-L1 can be involved in tumor escape, and little is known about the role of these molecules in oral tumors or pre-malignant lesions. In the present study, we investigated the expression of PD-1 and PD-L1 in the blood and lesion samples of patients with actinic cheilitis (AC) and oral squamous cell carcinoma (OSCC). Our results showed that lymphocytes from peripheral blood and tissue samples exhibited high expression of PD-1 in both groups analyzed. Patients with AC presented higher percentage as well as the absolute numbers of CD4+PD-1+ and CD8+PD-1+ lymphocytes in peripheral blood mononuclear cells (PBMC) than healthy individuals, while patients with OSCC presented an increased frequency of CD8+PD1+ in PBMC when compared with controls. On the other hand, increased frequency of CD4+ and CD8+ T cells expressing PD-1+ accumulate in samples from OSCC, and the expression of PD-L1 was intense in OSCC and moderate in AC lesion sites. Lower levels of IFN-γ and higher levels of TGF-β were detected in OSCC samples. Our data demonstrate that PD-1 and PD-L1 molecules are present in blood and samples of AC and OSCC patients. Further studies are required to understand the significance of PD-1 and PD-L1 in oral tumors microenvironment.
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Metadaten
Titel
Enhanced programmed death 1 (PD-1) and PD-1 ligand (PD-L1) expression in patients with actinic cheilitis and oral squamous cell carcinoma
verfasst von
Tatiana Salles de Souza Malaspina
Thaís Helena Gasparoto
Maria Renata Sales Nogueira Costa
Edgard Franco de Melo Jr
Maura Rosane Valério Ikoma
José Humberto Damante
Karen Angélica Cavassani
Gustavo Pompermaier Garlet
João Santana da Silva
Ana Paula Campanelli
Publikationsdatum
01.07.2011
Verlag
Springer-Verlag
Erschienen in
Cancer Immunology, Immunotherapy / Ausgabe 7/2011
Print ISSN: 0340-7004
Elektronische ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-011-1007-5

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