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- W2516701064 abstract "// Barbara Seliger 1 , Simon Jasinski-Bergner 1 , Dagmar Quandt 1 , Christine Stoehr 2 , Juergen Bukur 1 , Sven Wach 3 , Wolfgang Legal 3 , Helge Taubert 3 , Bernd Wullich 3 , Arndt Hartmann 2 1 Institute of Medical Immunology, Martin-Luther-University, Halle-Wittenberg, Germany 2 Institute of Pathology, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany 3 Clinics for Urology, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany Correspondence to: Barbara Seliger, email: Barbara.Seliger@uk-halle.de Keywords: HLA-E, non-classical HLA class I, renal cell carcinoma, tumor progression, immune escape Received: April 11, 2016 Accepted: July 27, 2016 Published: August 31, 2016 ABSTRACT The non-classical human leukocyte antigen E (HLA-E) expression is frequently overexpressed in tumor diseases, transplants and virus-infected cells and represents an immunomodulatory molecule by binding to the receptors CD94/NKG2A, -B and –C on NK and T cells. Due to its immune suppressive features HLA-E expression might represent an important mechanism of tumors to escape immune surveillance. While an aberrant expression of the non-classical HLA-G antigen in human renal cell carcinoma (RCC) has been demonstrated to be associated with a worse outcome of patients and reduced sensitivity to immune effector cell-mediated cytotoxicity, the expression and function of HLA-E has not yet been analyzed in this tumor entity. Higher levels of HLA-E transcripts were detected in all RCC cell lines and tumor lesions, which were tested in comparison to normal kidney epithelium. Immunohistochemical staining of a tissue microarray (TMA) using the HLA-E-specific monoclonal antibody TFL-033 recognizing the cytoplasmic HLA-E α-chain as monomer revealed a heterogeneous HLA-E expression in RCC lesions with the highest frequency in chromophobe RCC when compared to other RCC subtypes. HLA-E expression did not correlate with the frequency of CD3 + , CD4 + , CD8 + and FoxP3 + immune cell infiltrations, but showed an inverse correlation with infiltrating CD56 + cells. In contrast to HLA-G, HLA-E expression in RCCs was not statistically significant associated with a decreased disease specific survival. These data suggest that HLA-E overexpression frequently occurs in RCC and correlates with reduced immunogenicity." @default.
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- W2516701064 date "2016-08-31" @default.
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- W2516701064 title "HLA-E expression and its clinical relevance in human renal cell carcinoma" @default.
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- W2516701064 doi "https://doi.org/10.18632/oncotarget.11744" @default.
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