Cancer · 1996
Prognostic significance of Ki-67 labeling indices obtained using MIB-1 monoclonal antibody in patients with supratentorial astrocytomas.
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Wakimoto H, Aoyagi M, Nakayama T, Nagashima G, Yamamoto S, Tamaki M, Hirakawa K
Аннотация
BACKGROUND: Identification of the prognosis of patients with gliomas is important for selecting and evaluating the effectiveness of treatment. The aim of this study was to evaluate the Ki-67 labeling index (LI) using the newly generated MIB-1 monoclonal antibody (MoAb) as a prognostic indicator for patients with astrocytomas.
METHODS: Ki-67 immunohistochemistry was performed on paraffin sections to estimate the growth potential of 72 supratentorial astrocytomas using the MIB-1 MoAb after hydrated autoclaving treatment. Multivariate analysis using the Cox proportional hazard stepwise model was used to evaluate the influence of Ki-67 LI, as well as other prognostic factors, on the duration of survival of patients with supratentorial astrocytomas.
RESULTS: The mean Ki-67 LI was 3.8% (+/- 2.7%; standard deviation [SD]) in Grade 2 gliomas (n = 19), 18.4% (+/- 9.7% SD) in Grade 3 gliomas (n = 25), and 31.6% (+/- 12.9% SD) in Grade 4 gliomas (n = 28). Multivariate survival analysis showed that histologic grade, Ki-67 LI, and Karnofsky performance status (KPS) score before and after treatment were independent, statistically significant prognostic factors for patients with all grades of astrocytomas. In high grade lesions, Ki-67 LI, tumor location (superficial vs. deep), and KPS score after treatment were significant prognostic variables, whereas histologic grade did not meet the significance level for entry into the stepwise model.
CONCLUSIONS: These results indicate that the Ki-67 LI obtained using MIB-1 MoAb is an important and practical tool for estimating biologic behavior of gliomas, as well as for predicting survival.
METHODS: Ki-67 immunohistochemistry was performed on paraffin sections to estimate the growth potential of 72 supratentorial astrocytomas using the MIB-1 MoAb after hydrated autoclaving treatment. Multivariate analysis using the Cox proportional hazard stepwise model was used to evaluate the influence of Ki-67 LI, as well as other prognostic factors, on the duration of survival of patients with supratentorial astrocytomas.
RESULTS: The mean Ki-67 LI was 3.8% (+/- 2.7%; standard deviation [SD]) in Grade 2 gliomas (n = 19), 18.4% (+/- 9.7% SD) in Grade 3 gliomas (n = 25), and 31.6% (+/- 12.9% SD) in Grade 4 gliomas (n = 28). Multivariate survival analysis showed that histologic grade, Ki-67 LI, and Karnofsky performance status (KPS) score before and after treatment were independent, statistically significant prognostic factors for patients with all grades of astrocytomas. In high grade lesions, Ki-67 LI, tumor location (superficial vs. deep), and KPS score after treatment were significant prognostic variables, whereas histologic grade did not meet the significance level for entry into the stepwise model.
CONCLUSIONS: These results indicate that the Ki-67 LI obtained using MIB-1 MoAb is an important and practical tool for estimating biologic behavior of gliomas, as well as for predicting survival.