Ki67 Labelling Index predicts clinical outcome and survival in oral squamous cell carcinoma

Abstract Objective To investigate the Ki 67 expression and its correlation with clinicopathological features and 3 years as well as 5 years survival rate in oral squamous cell carcinoma (OSCC). Methodology Total 217cases of OSCC primarily treated with surgery with or without radiation were included. All patients were followed up for 3 years and 150 were followed up of 5 years for disease free survival. The immunohistochemistry was carried out on neutral buffered formalin fixed paraffin embedded tissue to evaluate the expression of Ki67. Results The Ki67 labeling index (LI) was significantly higher with respect to adverse clinicopathological parameters such as histopathological grading (p<0.001), clinical TNM staging (p<0.001) and nodal metastasis (p<0.001). The OSCC patients survived for less than 3 and 5 years were showed significantly higher Ki67 LI as compared to diseases free survived more than 3 and 5 years(p<0.001). The three years survival rate of OSCC patient significantly higher with low Ki67 LI (≤45) 96.2%, followed by moderate Ki67 LI (46 to 60) 60.7% and high Ki67 LI (≥61) 37.7% (p<0.001). The five years survival rate of OSCC patient statistically significantly higher with low Ki67 LI (≤45)93.3%, followed by moderate Ki67 LI (46 to 60) 46.8% and Ki67 LI (≥61) 23.3% (p<0.001). Conclusion The measurement of cell proliferative activity by using Ki67 antigen expression in individual OSCC might provide unique, predictive information on clinical outcome, prognosis and deciding treatment modalities in OSCC.

Clinicopathological study of premalignant and malignant lesions of cervix along with apoptotic index and Ki-67 expression

Background: Cervical cancer is known to have a good response to radiotherapy. The response and prognosis are dependent on the level of apoptosis. Pap smear and histopathology are cost-effective methods in diagnosing premalignant and malignant lesions of cervix but not accurate in classifying and estimating the progression of the disease, especially in premalignant lesions. Therefore this study was undertaken to know the role of Ki-67 expression and apoptotic index in classifying accurately the premalignant lesions for better management.Methods: The study included 540 cases diagnosed histologically as cervical intraepithelial neoplasia or carcinoma. The apoptotic index is calculated for all the 540 cases using light microscopy on Haematoxylin and Eosin stained sections. Ki-67 immunohistochemical staining was done for 100 cervical biopsies. Ki-67 expression was graded and the Ki-67 labelling index was calculated. Statistical evaluation was done using the unpaired t-test.Results: The Apoptotic index increased with increasing grade of dysplasia. There is a significant difference in the mean apoptotic index between premalignant and malignant lesions of the cervix. The ki-67 index increased with increasing grade of dysplasia. There is a significant difference in the mean Ki-67 index between premalignant and malignant lesions of the cervix.Conclusions: Apoptotic index and proliferative indices have been found useful in distinguishing between premalignant and malignant lesions of the cervix and gives an idea about the proliferative activity of the tumour for better management of the patient and to determine prognosis.

Glut1 Expression and FDG Uptake in Non-small Cell Lung Carcinoma: Its Relationship to Histopathologic Types and Proliferation Rate

PURPOSE: 18F-fluoro-2-deoxy-d-glucose (18F-FDG) positron emission tomography (PET) is known to be useful in the detection of lung cancer. However, the degree of FDG uptake was variable. To correlate FDG activity on PET with various histopathologic factors,we assessed the relationships between 18F-FDG uptake and glucose transporter 1 (Glut1) expression, histologic subtypesand Ki-67 labelling indices. MATERIALS AND METHODS: One hundred two patients with non-small cell lung cancer (NSCLC) who had surgery and preoperative 18F-FDG PET scan as a part of the staging work-up were enrolled in this study. The amount of FDG uptake in the primary lesion was measured by a standardized uptake values (SUVs) and correlated with tumor size, histologic subtypes, and immunohistochemical results of Glut1 and Ki-67 labelling indices. RESULTS: Cell type of NSCLC were 52 adenocarcinomas, 36 squamous cell carcinomas, 14 other NSCLC. All tumors could be detected by FDG PET. Uptake was correlated with tumor size (p<0.01). The FDG uptake was significantly lower in adenocarcinomas than in squamous cell carcinomas or other NSCLC (p<0.001). The percentages of Glut1- positive area and staining intensity of the tumor were also significantly lower in adenocarcinomas than in squamous cell carcinomas or other NSCLC (p<0.001). Ki-67 labelling indices of the tumor correlated with the percentage of Glut1 intensity and SUVs in NSCLC (p7lt;0.001). CONCLUSION: These results suggest that overexpression of Glut1 and proliferating activity is related to 18F-FDG uptake in NSCLC. Glut1 expression appear to be different among histologic subtypes. Glut1 expression, as well as FDG uptake, is lower in adenocarcinomas than squamous cell carcinomas or other NSCLC.

The Relationship between Clinical Features and Changes of Proliferative Activity Analysed by Ki-67 in Recurrent Astrocytic Tumors

The relationship between the proliferative activity and clinical features in 21 cases of recurrent astrocytic tumors were studied. The proliferative activity of tumor cell was analysed by Ki-67 labelling index using immunohistochemistry for MIB-1 antibody. Positive relationships were noted on clinical features, such as mean ages, time interval between primary and secondary operation, postoperative survival, and histopathologic grade with Ki-67 labelling indices in the primary tumors. Unlike to these, clinicopathologic characteristrics were not positively correlated in secondary recurrent tumors. It is thus suggested that Ki-67 labelling indices would be valuable in the estimations of clinical prognosis and histopathologic grades in the primary astrocytic tumors but might not be in the recurrent astrocytic tumors due to change of biologic features of tumor cell after radiotherapy and/or chemotherapy.

Prognostic Significance of Proliferating Cell Nuclear Antigen in Epithelial Ovarian Cancer / 대한산부인과학회잡지

No abstract available.

The prognostic significance of tumor angiogenesis, proliferating cell nuclear antigen(PCNA), and the Ki-67 index in carcinoma of the uterine cervix

Angiogenesis, the induction of new capillaries and venules, is associated with tumor growth. This study was designed to determine whether cervical carcinomas are angiogenic, and to investigate whether tumor angiogenesis can serve as a prognostic factor in cervical carcinoma. Surgical specimens of 47 cervical carcinomas were immunohistochemically stained specifically for endothelial cells with factor VIII-related antigen to identify all vessels. Microvessels were counted from photographs of 200x microscopic fields. In addition, thirty-seven cases were studied by immunohistochemical means using the monoclonal antibodies for PCNA and for Ki-67 to determine tumor cell proliferation rates in cervical carcinomas. The microvessel count(MVC), the PCNA labelling index, and the Ki-67 index were calculated and compared with known prognostic factors and disease free survival rates in cervical carcinomas. A wide range in the MVC count(range 12-100 mean=38.2+/-19.2), the PCNA labeling index(8-69% mean=33.6+/-15.2%), and in the extent of Ki-67 staining(0-43% mean=10.3+/-10.5%) was observed, indicating considerable variation of tumor angiogenic activity and tumor growth rates. This study showed statistically significant correlations in disease free survival rates with both lymph node status and the microvessel count. However, there was no significant difference in disease free survival rates between tumor stage, age, the PCNA labelling index, and the Ki-67 index.

Expression of p53 Protein and PCNA in Brain Tumors

Formalin-fixed, paraffin-embedded samples of 32 brain tumors(8 meningiomas, 10 astrocytomas(low grade 5, anaplastic 5), 8 glioblastoma multiforme, 6 oligodendrogliomas(low grade 2, anaplastic 3) were investigated by immunocytochemistry with monoclonal antibodies against p53 protein and proliferating cell nuclear antigen(PCNA). Expression of p53 protein was detected in 1 of 5 cases(20%) of low grade astrocytomas, 2 of 5 cases(40%) of anaplastic astrocytoma, 4 of 8 cases(50%) of glioblastoma multiforme and 4 of 4 cases(100%) of malignant oligodendroglioma. All low grade oligodendrogliomas, meningiomas fail to express p53. Expression of PCNA was detected in 3 of 8 cases of meningioma with very low labeling index(0-0.3), 2 of 5 cases of low grade astrocytoma with low labeling index(0-11.3), 3 of 5 cases of anaplastic astrocytoma with middle labeling index(0-28.2), 6 of 8 cases of glioblastoma multiforme and 4 of 4 cases of malignant oligodendroglioma with high labelling index(0-92.3, 7.6-48.1). Expression of PCNA was not detected in low grade oligodendrogliomas. Tumor group with high expression of p53 protein showed increment of PCNA expression. A strong positive correlation between tumor grade and extent of p53 protein and PCNA expression was found(p<0.002) .

Correlation of Histologic Findings of Ovarian Epithelial Tumors with Expression of Proliferating Cell Nuclear Antigen and Flow Cytometric DNA Analysis

The prognosis of malignant ovarian tumor is poorer than that of borderline malignant ovarian tumor, Therefore an accurate diagnosis and estimation of the biologic behavior of the tumor are necessary for proper management of the patient. The histologic investigation of the tumor may provide information on the estimation of the malignant potential of tumor cells, but it may be a questionable method because of the subjective determination of tumor grade. Quantification of proliferative activity of tumor cells may play a role as an objective method to provide an estimation of the malignant potential of tumor cells. An evaluation of histologic findings was done on 84 cases of ovarian mucinous and serous tumors that were surgically resected and diagnosed during the period from January 1981 through July 1992. The proliferating cell nuclear antigen (PCN A) labelling index estimated from the immunohistochemical stain for PCN A and the Sphase fraction and porliferative index obtained from flow cytometric DN A analysis were assessed each other with histologic findings. The results are as follows: The presence of aneuploidy in malignant tumors was statistically significant as compared with benign tumors. The borderline malignant tumors showed no significant difference between the number of diploidy and aneuploidy. The PCNA labelling index, S-phase fraction and proliferative index tended to increase as the histologic grade of tumors went up. They were higher in malignant tumors than in others. The PCN A labelling index, S-phase fraction and proliferative index were higher in tumors with aneuploidy than in those with diploidy. In contrast to borderline malignant tumors, the PCNA labelling index in malignant tumors revealed a significant relation with the mitotic index. The S-phase fraction and proliferative index showed, in malignant tumors, a close correlation with the architectural grade and nucleolar grade, but not in borderline malignant tumors. Considering these results, the presence of aneuploidy, PCNA label.

Proliferating Cell Nuclear Antigen : Relation to Histologic Grade and Prognosis / 대한부인종양콜포스코피학회잡지

The measurement of tumor cell proliferation is becoming inueasingly recognized in defining prognostic groups. Boliferatirg cell nuclear antigen(PCNA) imrnunolocalimtion can be used as an index of cell proliferation and rnay define the extent of deppature from norrmil gmwth control. PCNA is eonsidered to be maker of cell proliferation. The aim of this study was to evnlunte the expreeion of PCNA in epithelial ocarian cancer as well as the possible correlation with degree of differentiation, tumor etage and overall survival. The material consisted of 35 epithehal ovarian cancer. The PCNA labelling index (Ll) ranged from 7.5% to 92.5% with a median value of 46.7%. PCNA labelling index (LI) is 30% in grade 1, 63% in grade 2, and 100% in grade 3 in epithelial ovarian cancer(p>0.05). Also, a positive correlation was found between PCNA labelling index (LI) and clinical stage (P<0.05) The estimated 3 year survival in patients with a tumor LI below the median (low proliferative group) was higher than those with a tumor LI greater than the median(high proliferation group) (87.5% VS 50%, P<0.05).

Proliferating Cell Nuclear Antigen : Relation to Histologic Grade and Prognosis / 대한부인종양콜포스코피학회잡지

The measurement of tumor cell proliferation is becoming inueasingly recognized in defining prognostic groups. Boliferatirg cell nuclear antigen(PCNA) imrnunolocalimtion can be used as an index of cell proliferation and rnay define the extent of deppature from norrmil gmwth control. PCNA is eonsidered to be maker of cell proliferation. The aim of this study was to evnlunte the expreeion of PCNA in epithelial ocarian cancer as well as the possible correlation with degree of differentiation, tumor etage and overall survival. The material consisted of 35 epithehal ovarian cancer. The PCNA labelling index (Ll) ranged from 7.5% to 92.5% with a median value of 46.7%. PCNA labelling index (LI) is 30% in grade 1, 63% in grade 2, and 100% in grade 3 in epithelial ovarian cancer(p>0.05). Also, a positive correlation was found between PCNA labelling index (LI) and clinical stage (P<0.05) The estimated 3 year survival in patients with a tumor LI below the median (low proliferative group) was higher than those with a tumor LI greater than the median(high proliferation group) (87.5% VS 50%, P<0.05).