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Expression of Annexin A1 and UCH-L1 in central nervous system neuroepithelial tumors Cover

Expression of Annexin A1 and UCH-L1 in central nervous system neuroepithelial tumors

Open Access
|Feb 2017

Abstract

Background: Pathological diagnosis of CNS neuroepithelial tumors can be problematic due to morphological similarity, and many tumors in the group share immunohistochemical profile. New markers are needed to enhance histologic diagnosis.

Objective: We studied Annexin A1 and UCH-L1 expression in CNS neuroepithelial tumors, with regard to a possible application for practical usage.

Methods: Expression of Annexin A1 and UCH-L1 was evaluated in 224 various neuroepithelial tumors by immunohistochemistry using tissue microarrays.

Results: Annexin A1 was expressed by the majority of ependymoma (92%) but none of central neurocytoma (p = 0.0000002) and medulloblastoma (p <10-8). Absence of Annexin A1 and/or UCH-L1 was associated with low-grade astrocytoma rather than ependymoma (p = 0.0000009). Percentage of positive Annexin A1 and UCHL1 paralleled increasing histologic grades in diffuse astrocytomas.

Conclusion: Expression of Annexin A1 distinguishes ependymoma from central neurocytoma, and from medulloblastoma. Demonstration of Annexin A1 and/or UCH-L1 might be helpful to differentiate ependymoma from low-grade astrocytoma. Up-regulation of Annexin A1 and UCH-L1 in increasing histologic grade of diffuse astrocytomas suggests their roles in the malignant transformation.

DOI: https://doi.org/10.5372/1905-7415.0701.153 | Journal eISSN: 1875-855X | Journal ISSN: 1905-7415
Language: English
Page range: 81 - 88
Published on: Feb 4, 2017
Published by: Chulalongkorn University
In partnership with: Paradigm Publishing Services
Publication frequency: 6 issues per year

© 2017 Kanokkarn Takaew, Jutamas Wongphoom, Preecha Ruangvejvorachai, Shanop Shuangshoti, published by Chulalongkorn University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.