PMID- 24355224 OWN - NLM STAT- MEDLINE DCOM- 20140423 LR - 20231213 IS - 0394-6320 (Print) IS - 0394-6320 (Linking) VI - 26 IP - 4 DP - 2013 Oct-Dec TI - Differential expression of immune-modulatory molecule HLA-E in non-neoplastic and neoplastic lesions of the thyroid. PG - 889-96 AB - Human leukocyte antigen (HLA)–E is a non-classical molecule of the histocompatibility complex that functions as one of the main ligands of the Natural Killer (NK) cell inhibitory receptor CD94/NKG2A and inhibits its potent cytotoxic activity. Due to the important role of NK cells in combating neoplasm, we hypothesized that the differential expression of HLA-E could favor the progression of heterogeneous thyroid tumors.Using an immunohistochemistry technique in 143 biopsies of thyroid tumors, including benign and malignant neoplasms and goiters, we evaluated the expression of HLA-E among various tumor types and its association with the clinicopathological factors of diseases. We verified high HLA-E expression in all types of neoplastic tumors, although no significant differences between the groups were found. Low expression was observed in 95 percent of the goiter samples, showing significant differences between neoplastic and non-neoplastic lesions. Furthermore, a significant result was found with regard to the tumor size, with high HLA-E expression being related to smaller tumors. Therefore, our data suggest that an increase in HLA-E may be associated with the establishment of thyroid neoplasms, with either benign or malignant features. FAU - Zanetti, B R AU - Zanetti BR AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Carvalho-Galano, D F AU - Carvalho-Galano DF AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Feitosa, N L F AU - Feitosa NL AD - Department of Internal Medicine, Division of Endocrinology and Metabolism, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Hassumi-Fukasawa, M K AU - Hassumi-Fukasawa MK AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Miranda-Camargo, F A AU - Miranda-Camargo FA AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Maciel, L M Z AU - Maciel LM AD - Department of Internal Medicine, Division of Endocrinology and Metabolism, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Ribeiro-Silva, A AU - Ribeiro-Silva A AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. FAU - Soares, E G AU - Soares EG AD - Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil. LA - eng PT - Journal Article PL - England TA - Int J Immunopathol Pharmacol JT - International journal of immunopathology and pharmacology JID - 8911335 RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Adult MH - Aged MH - Female MH - Histocompatibility Antigens Class I/*analysis MH - Humans MH - Immunohistochemistry MH - Male MH - Middle Aged MH - Thyroid Gland/*immunology MH - Thyroid Neoplasms/*immunology MH - HLA-E Antigens EDAT- 2013/12/21 06:00 MHDA- 2014/04/24 06:00 CRDT- 2013/12/21 06:00 PHST- 2013/12/21 06:00 [entrez] PHST- 2013/12/21 06:00 [pubmed] PHST- 2014/04/24 06:00 [medline] AID - 7 [pii] AID - 10.1177/039463201302600407 [doi] PST - ppublish SO - Int J Immunopathol Pharmacol. 2013 Oct-Dec;26(4):889-96. doi: 10.1177/039463201302600407.