title: Nestin as a marker for proliferative endothelium in gliomas.
abstract: Nestin is one of the intermediate filaments abundantly produced in the developing central nervous system and somites in the embryonic stage. Nestin is also reportedly detected in gliomas/glioblastomas. We retested nestin expression in brain tumors having a range of malignancy grades using immunostaining. The intensity of nestin immunostaining roughly paralleled the malignancy grade of the gliomas. However, many tumors were negative for nestin immunostaining, while nestin immunostaining was invariably detected in tumor endothelium regardless of glioma malignancy grades or brain tumor types. We suspected that angiogenic epithelial cells may express nestin, and we found that nestin was highly positive in bovine aortic endothelial cells in static culture. However, nestin expression decreased when the endothelial cells underwent laminar shear stress flow, under which endothelial cells exhibit differentiated features and a decreased rate of growth. Because nestin is highly expressed in growing endothelial cells, we examined its expression in hemangioblastomas because hemangioblasts are thought to be a precursor for angiogenic epithelial cells. As expected, nestin immunostained strongly in all four samples of hemangioblastomas. We suggest that nestin is not only a marker for neuroepithelial stem cells and glioma cells but also for tumor endothelial cells during rapid growth.
authors.affiliation: Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi 371-8512, Japan.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Sugawara
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kurihara
authors.forename: Mitsuko
authors.initials: M
authors.lastname: Negishi
authors.forename: Nobuhito
authors.initials: N
authors.lastname: Saito
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Nakazato
authors.forename: Tomio
authors.initials: T
authors.lastname: Sasaki
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Takeuchi
mesh_terms: D000818:Animals; D014408:Biomarkers, Tumor / Q000032:analysis*; D001932:Brain Neoplasms / Q000098:blood supply / Q000737:chemistry* / Q000473:pathology; D002417:Cattle; D002455:Cell Division; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000737:chemistry* / Q000473:pathology; D019084:Fluorescent Antibody Technique, Indirect; D005910:Glioma / Q000098:blood supply / Q000737:chemistry* / Q000473:pathology; D018325:Hemangioblastoma / Q000098:blood supply / Q000737:chemistry / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D007381:Intermediate Filament Proteins / Q000032:analysis* / Q000235:genetics; D009367:Neoplasm Staging; D009419:Nerve Tissue Proteins; D064231:Nestin; D012333:RNA, Messenger / Q000378:metabolism; D011817:Rabbits; D013314:Stress, Mechanical
chemical_list: D014408:Biomarkers, Tumor; D007381:Intermediate Filament Proteins; C577484:NES protein, human; D009419:Nerve Tissue Proteins; D064231:Nestin; D012333:RNA, Messenger