Variability in Immunohistochemical Detection of Programmed Death Ligand 1 (PD-L1) in Cancer Tissue Types

Giosuè Scognamiglio; Anna De Chiara; Maurizio Di BonitoFabiana TatangeloNunzia Simona LositoAnnamaria AnnicielloRossella De CecioCrescenzo D’AlterioStefania ScalaMonica CantileGerardo Botti

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Variability in Immunohistochemical Detection of Programmed Death Ligand 1 (PD-L1) in Cancer Tissue Types

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In normal cell physiology, programmed death 1 (PD-1) and its ligand, PD-L1, play an immunoregulatory role in T-cell activation, tolerance, and immune-mediated tissue damage. The PD-1/PD-L1 pathway also plays a critical role in immune escape of tumor cells and has been demonstrated to correlate with a poor prognosis of patients with several types of cancer. However, recent reports have revealed that the immunohistochemical (IHC) expression of the PD-L1 in tumor cells is not uniform for the use of different antibodies clones, with variable specificity, often doubtful topographical localization, and with a score not uniquely defined. The purpose of this study was to analyze the IHC expression of PD-L1 on a large series of several human tumors to correctly define its staining in different tumor tissues.

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《international journal of molecular sciences》 |2016年第5期|共页
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Giosuè Scognamiglio; Anna De Chiara; Maurizio Di BonitoFabiana TatangeloNunzia Simona LositoAnnamaria AnnicielloRossella De CecioCrescenzo D’AlterioStefania ScalaMonica CantileGerardo Botti;
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Variability in Immunohistochemical Detection of Programmed Death Ligand 1 (PD-L1) in Cancer Tissue Types

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