Analysis of Proliferative Potentials in Meningiomas by Ki-67, Proliferating Cell Nuclear Antigen, and Flow Cytometry.
- Author:
Jae Sung AHN
1
;
Jeong Hoon KIM
;
Byung Duk KWUN
Author Information
1. Department of Neurological Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Meningiomas;
Proliferative potentials;
Ki-67;
Proliferating cell nuclear antigen;
Flow cytometry
- MeSH:
DNA;
Flow Cytometry*;
Ki-67 Antigen;
Meningioma*;
Ploidies;
Proliferating Cell Nuclear Antigen*
- From:Journal of Korean Neurosurgical Society
2001;30(7):861-869
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: In this study, we investigated the relationship between the histologic grading of meningiomas and proliferative potentials determined by the Ki-67, proliferating cell nuclear antigen(PCNA) and flow cytometry (FCM) with the aim of determining whether these potentials can be used as a parameter to the proliferative activity, in particular of atypical and malignant meningiomas. METHODS: This study consisted of 47 meningiomas(6 malignant, 14 atypical, and random sampled 27 benign meningiomas). By immunohistochemical staining of Ki-67 and PCNA on formalin-fixed, paraffin-embedded sections, the anti-human rabbit polyclonal antibody against Ki-67 antigen and anti-PCNA monoclonal antibody(PC10) scores were counted. FCM was also performed on paraffin-embedded tissue using a selective staining technique for DNA. DNA ploidy, S-phase fraction, and proliferative index(PI)) were determined. RESULTS: The results are summarized as follows; 1) Proliferation rates as assessed by Ki-67 and PCNA closely correlated with the degree of anaplastic histologic features. 2) Proliferative potentials determined by FCM(S-phase fraction and PI) were not able to distinguish between benign and atypical/malignant meningiomas. 3) DNA ploidy was not a useful indicator of histologic grade in these tumors. 4) Proliferative potentials such as Ki-67 staining index(SI) and PCNA SI did not correlate with the ploidy pattern. 5) There was a linear correlation between Ki-67 SI and PCNA SI, but we could not find a correlation between Ki-67 SI and S-phase fraction or PI. Our results also did not show a statistically signficant correlation between PCNA SI and S-phse fraction or PI. CONCLUSIONS: We conclude that evaluation of the proliferative potentials with Ki-67 and PCNA is important as an additional factor for the prediction of malignancy in meningiomas. A dual study of Ki-67 and PCNA SIs on the same tissue might improve the accuracy with which the proliferative potential of a tumor can be predicted. We demonstrated that FCM in meningiomas is not valuable in predicting the behavior of these neoplasms, but we did observe a trend toward more malignancy with higher percent S-phase fraction and higher PI. Analysis of the S-phase fraction and PI might therefore be a useful tool to discriminate among histologic grades of meningiomas.
