title: Undersulfation of glycosaminoglycans induced by sodium chlorate treatment affects the progression of C6 rat glioma, in-vivo.
abstract: The stimulatory input of extracellular matrix (ECM) components has been implicated in the invasive properties of glioma cells. It has been demonstrated that undersulfation of glycosaminoglycans (GAGs) promoted by sodium chlorate (SC) treatment reduces C6 glioma cell proliferation and adhesion to ECM molecules, in-vitro. In the present study, the authors investigated the involvement of GAG undersulfation in glioma cell growth in the brain parenchyma. The in-vitro treatment of C6 cells with SC and subsequent intracerebral inoculation in vehicle containing SC resulted in a reduced proportion of animals bearing glioma and a reduced tumor mass diameter. It also promoted longer animal survival. Intracerebral inoculation of SC-treated C6 cells in vehicle without SC or the SC treatment after intracerebral implantation of untreated C6 cells did not result in any reduction of tumor growth. Alterations in clinical, hematological and behavioral parameters in the open field were observed near the point of death when tumors presented a greater size. The results suggest an important role of GAGs in glioma growth which possibly affects cell proliferation and/or interactions with the normal tissue environment.
authors.affiliation: Departamento de Biologia Celular, Embriologia e Genética, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, 88040-900, Trindade, Florianópolis, S.C., Brazil.
authors.forename: Bruno
authors.initials: B
authors.lastname: Lobão-Soares
authors.forename: Marcio
authors.initials: M
authors.lastname: Alvarez-Silva
authors.forename: Claudia B N
authors.initials: CB
authors.lastname: Mendes de Aguiar
authors.forename: Mauro
authors.initials: M
authors.lastname: Nicolau
authors.forename: Andrea G
authors.initials: AG
authors.lastname: Trentin
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology; D001932:Brain Neoplasms / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D016380:Brain Tissue Transplantation / Q000379:methods; D002448:Cell Adhesion / Q000187:drug effects / Q000502:physiology; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002704:Chlorates / Q000494:pharmacology*; D018450:Disease Progression; D005109:Extracellular Matrix / Q000187:drug effects* / Q000378:metabolism; D005910:Glioma / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D006025:Glycosaminoglycans / Q000378:metabolism*; D006540:Herbicides / Q000494:pharmacology; D008297:Male; D009361:Neoplasm Invasiveness / Q000503:physiopathology / Q000517:prevention & control*; D051381:Rats; D017208:Rats, Wistar; D013431:Sulfates / Q000378:metabolism; D015996:Survival Rate; D016896:Treatment Outcome
chemical_list: D000970:Antineoplastic Agents; D002704:Chlorates; D006025:Glycosaminoglycans; D006540:Herbicides; D013431:Sulfates; C032706:sodium chlorate