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자료유형
학술저널
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대한병리학회 Journal of Pathology and Translational Medicine Journal of Pathology and Translational Medicine 제45권 제3호
발행연도
2011.1
수록면
276 - 280 (5page)

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Background: Expression studies of somatostatin receptor type 2A (SSTR2A) in neuroendocrine neoplasms (NENs) led to the development of clinically relevant diagnostic and therapeutic strate­gies. However, most of these strategies used in-house-developed antibodies and were focused on lung tumors. We evaluated commercially available SSTR2A antibodies in NENs of the colorec­tum to observe their subcellular localization and distribution within the resected tumor. Methods: The immunohistochemistry of 77 NENs located in the colorectum were studied using a commer­cially available antibody against SSTR2A. Results: Most neuroendocrine tumors (NET) grade (G)1 and G2 expressed the SSTR2A in the cytoplasm with apical or luminal localization. However, all neuroendocrine carcinomas (NEC) G3 were negative for SSTR2A. Conclusions: Our data indicate that SSTR2A immunohistochemistry shows cytoplasmic staining with distinct subcellular local­ization in most NET G1 in the colorectum using a commercially available antibody. Low or no ex­pression of SSTR2A in NET G2 and NEC G3 raises the possibility that SSTR2A may correlate with histologic differentiation and proliferative activity. Further validation studies in large case series are needed.

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