Blood vessels expressing CD90 in human and rat brain tumors

Neuropathology : Official Journal of the Japanese Society of Neuropathology
Akihiro InoueTakanori Ohnishi

Abstract

Blood vessels in brain tumors, particularly glioblastomas, have been shown to express CD90. CD90(+) cells in and around blood vessels in cancers including brain tumors have been identified as endothelial cells, cancer stem cells, fibroblasts or pericytes. In this study, we aimed to determine the nature or type(s) of cells that express CD90 in human brain tumors as well as an experimental rat glioma model by double immunofluorescence staining. The majority of CD90(+) cells in human glioblastoma tissue expressed CD31, CD34 and von Willebrand factor, suggesting that they were endothelial cells. Vasculatures in a metastatic brain tumor and meningioma also expressed CD90. CD90(+) cells often formed glomeruloid structures, typical of angiogenesis in malignant tumors, not only in glioblastoma but also in metastatic tumors. Some cells in the middle and outer layers of the vasculatures expressed CD90. Similar results were obtained in the rat glioma model. There were cells expressing both α-smooth muscle actin and CD90 in the middle layer of blood vessels, indicating that smooth muscle cells and/or pericytes may express CD90. CD90(+) vasculatures were surrounded by tumor-associated macrophages (TAMs). Thus, in addition to endothelial cel...Continue Reading

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Citations

Feb 23, 2018·Journal of Neuro-oncology·Elmar KirchesChristian Mawrin
Apr 15, 2017·Frontiers in Pharmacology·Talita GlaserXiang Zeng
Jul 25, 2021·The Journal of Clinical Endocrinology and Metabolism·Asumi IesatoCarmelo Nucera

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