title: Serum proteolytic activity during the growth of C6 astrocytoma.
abstract: Tumor growth is dependent on the ability of neoplastic cells to induce angiogenesis. Blood-vessel remodeling requires the reconstruction of the nonfibrous proteins and type IV collagen components of the basement membrane. This study has assessed the influence of the growth of C6 astrocytoma cells in the rat spheroid implantation model on serum general protease and type IV collagenase activity. The results demonstrate that general protease activity increased in serum, reaching maximum values on Day 6 and Day 13 following spheroid implantation, and that type IV collagenase activity increased in serum, obtaining maximum values on Day 8 and Day 15. The measurement of serum proteolytic activity may be of value in the detection of recurrent tumors.
authors.affiliation: Department of Clinical Neurological Sciences, University of Western Ontario, London, Canada.
authors.forename: I S
authors.initials: IS
authors.lastname: Vaithilingam
authors.forename: W
authors.initials: W
authors.lastname: McDonald
authors.forename: N K
authors.initials: NK
authors.lastname: Brown
authors.forename: E
authors.initials: E
authors.lastname: Stroude
authors.forename: R A
authors.initials: RA
authors.lastname: Cook
authors.forename: R F
authors.initials: RF
authors.lastname: Del Maestro
mesh_terms: D000818:Animals; D001254:Astrocytoma / Q000201:enzymology* / Q000473:pathology; D001932:Brain Neoplasms / Q000201:enzymology* / Q000473:pathology; D002455:Cell Division / Q000502:physiology; D020780:Matrix Metalloproteinase 9; D008565:Membrane Proteins / Q000378:metabolism; D003012:Microbial Collagenase / Q000097:blood*; D009368:Neoplasm Transplantation; D010447:Peptide Hydrolases / Q000097:blood*; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D008565:Membrane Proteins; D010447:Peptide Hydrolases; D003012:Microbial Collagenase; D020780:Matrix Metalloproteinase 9