Podoplanin: a marker for reactive gliosis in gliomas and brain injury.

Abstract:

:Reactive astrogliosis is associated with many pathologic processes in the central nervous system, including gliomas. The glycoprotein podoplanin (PDPN) is upregulated in malignant gliomas. Using a syngeneic intracranial glioma mouse model, we show that PDPN is highly expressed in a subset of glial fibrillary acidic protein-positive astrocytes within and adjacent to gliomas. The expression of PDPN in tumor-associated reactive astrocytes was confirmed by its colocalization with the astrocytic marker S100β and with connexin43, a major astrocytic gap junction protein. To determine whether the increase in PDPN is a general feature of gliosis, we used 2 mouse models in which astrogliosis was induced either by a needle injury or ischemia and observed similar upregulation of PDPN in reactive astrocytes in both models. Astrocytic PDPN was also found to be coexpressed with nestin, an intermediate filament marker for neural stem/progenitor cells. Our findings confirm that expression of PDPN is part of the normal host response to brain injury and gliomas, and suggest that it may be a novel cell surface marker for a specific population of reactive astrocytes in the vicinity of gliomas and nonneoplastic brain lesions. The findings also highlight the heterogeneity of glial fibrillary acidic protein-positive astrocytes in reactive gliosis.

authors

Kolar K,Freitas-Andrade M,Bechberger JF,Krishnan H,Goldberg GS,Naus CC,Sin WC

doi

10.1097/NEN.0000000000000150

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

64-74

issue

1

eissn

0022-3069

issn

1554-6578

journal_volume

74

pub_type

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