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Lucas Leite Cunha
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Marjory Alana Marcello
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Elaine Cristina Morari
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Suely Nonogaki Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Fábio Frangiotti Conte Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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René Gerhard Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Fernando Augusto Soares Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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José Vassallo Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil
Laboratory of Cancer Molecular Genetics, Adolfo Lutz Institute, Department of Genetics and Evolution, Department of Radiology, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Laura Sterian Ward
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B7H1 is consistently associated with inhibition of the immune system in many solid tumors. However, there is no report about its impact on differentiated thyroid carcinoma (DTC) presentation, aggressiveness, or evolution. Aiming to investigate the role of B7H1 in DTC and correlate this protein with other tumor-infiltrating immune cells, we studied 407 thyroid nodule tissue samples including 293 from DTC patients, all managed according to a same standard protocol. In addition, we obtained 5 normal and 114 benign thyroid lesions. Eighteen out of the 253 papillary thyroid carcinomas were paired with respective metastatic lymph node tissues. B7H1 (CD274) protein expression was assessed by immunohistochemistry and the gene expression was quantified by real-time PCR. Malignant tissues displayed a more intense B7H1 staining and higher mRNA levels than benign tissues (both P<0.0001). We observed a positive linear correlation between higher age at diagnosis and B7H1 mRNA levels (P=0.02896). Elevated levels of B7H1 protein were associated with the presence of CD4+, CD8+, CD20+, and FoxP3+ lymphocytes (all P<0.05); tumor-associated macrophages (P<0.0001); and the presence of myeloid-derived suppressor cells (P=0.03256). Stage II–IV patients presented higher B7H1 mRNA levels than stage I cases (P=0.03522). On the contrary, a decreased expression of B7H1 protein was observed in lymph node metastasis (P=0.0152). In conclusion, our data demonstrate that B7H1 expression is associated with features of aggressiveness, suggesting that this is an immune evasion mechanism of DTC cells.

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Lucas Leite Cunha Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Elaine Cristina Morari Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Ana Carolina Trindade Guihen Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Daniela Razolli Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Renê Gerhard Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Suely Nonogaki Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Fernando Augusto Soares Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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José Vassallo Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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Laura Sterian Ward Laboratory of Cancer Molecular Genetics, Laboratory of Cell Signaling, Department of Radiology, Adolfo Lutz Institute, Department of Pathology, Laboratory of Investigative and Molecular Pathology (Ciped), Faculty of Medical Sciences, University of Campinas (Unicamp), PO Box 6111, 126 Tessalia Vieira de Camargo Street, Campinas, São Paulo, Brazil

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