title: Relationships between Ki-67 labelling index, amplification of the epidermal growth factor receptor gene, and prognosis in human glioblastomas.
abstract: The aim of this study was to determine possible relationships between Ki-67 labelling index (Ki-67 LI), amplification of the epidermal growth factor receptor (EGFR) gene, and prognosis in human glioblastomas. Ki-67 LI was determined on cryosections of biopsy specimens of 20 human glioblastomas with a mouse anti-human Ki-67 monoclonal antibody. Amplification of the EGFR gene was determined by slot blot and Southern blot analyses of DNA extracted from the tumour biopsies. The Ki-67 LI was higher in the glioblastoma group with EGFR gene amplification (8 tumours, median value of Ki-67 LI 4.2, range 0.4-24.6) than in those without EGFR gene amplification (12 tumours, median value of Ki-67 LI 0.8, range 0.2-11.8) (0.05 p less than 0.1). The glioblastoma patients with Ki-67 LI greater than 1.5 (10 tumours) had a statistically significant shorter survival than those with Ki-67 LI less than 1.5 (10 tumours) (p less than 0.05). The glioblastoma patients with EGFR gene amplification lived shorter time than those without EGFR gene amplification (p greater than 0.05).
authors.affiliation: Institute of Cancer Research, Medical Technical Centre, Trondheim, Norway.
authors.forename: S H
authors.initials: SH
authors.lastname: Torp
authors.forename: E
authors.initials: E
authors.lastname: Helseth
authors.forename: A
authors.initials: A
authors.lastname: Dalen
authors.forename: G
authors.initials: G
authors.lastname: Unsgaard
mesh_terms: D000206:Actuarial Analysis; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D002455:Cell Division / Q000235:genetics* / Q000502:physiology; D066246:ErbB Receptors / Q000235:genetics*; D005260:Female; D005784:Gene Amplification / Q000235:genetics*; D015972:Gene Expression Regulation, Neoplastic / Q000502:physiology*; D005910:Glioma / Q000235:genetics* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D006801:Humans; D019394:Ki-67 Antigen; D008297:Male; D008875:Middle Aged; D008940:Mitotic Index; D009687:Nuclear Proteins / Q000235:genetics*; D011379:Prognosis; D016019:Survival Analysis
chemical_list: D019394:Ki-67 Antigen; D009687:Nuclear Proteins; D066246:ErbB Receptors