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Response of microglial cells to experimental rat glioma
Author(s) -
Morioka Takato,
Baba Takehiko,
Black Keith L.,
Streit Wolfgang J.
Publication year - 1992
Publication title -
glia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.954
H-Index - 164
eISSN - 1098-1136
pISSN - 0894-1491
DOI - 10.1002/glia.440060110
Subject(s) - microglia , griffonia simplicifolia , glioma , biology , pathology , glial tumor , lectin , stain , neuroglia , immunohistochemistry , angiogenesis , brain tumor , central nervous system , neuroscience , immunology , staining , cancer research , inflammation , medicine
The response of indigenous CNS microglia to an experimentally induced glioma has been studied in rat brain using lectin histochemistry with the Griffonia simplicifolia B 4 ‐isolectin. The study was undertaken 2 weeks after tumor cell injection when tumor size was near maximal. Reactive microglial cells formed a dense band that surrounded most of the well‐circumscribed tumor mass, and extended along the corpus callosum into the contralateral cerebral hemisphere. From the periphery inward, reactive microglia extended into the tumor tissue, where large numbers of them were found to be present as microglia‐derived macrophages. The lectin stain, which also labels endo thelial cells, revealed a highly vascularized tumor with ongoing neovascularization apparent as vascular sprouts. Moderate numbers of lectin‐stained blood monocytes were localized primarily inside the vessel lumina. Our results show that microglial cells react to brain tumors; however, it remains to be determined whether the microglial response represents an active antitumor defense mechanism that could be manipulated during immunotherapeutic approaches. © 1992 Wiley‐Liss, Inc.