Cancer Research and Treatment

Original Articles

Prognostic Value of PCNA , c-erbB-2 , c-fos in Patients with Non-small Cell Lung Cancer: Yi Hyeong Lee, Joong Bae Ahn, Dong Hwang Shin, Soon Won Hong, Jeong Yeon Shim, Kyung Young Jung, Se Kyu Kim, Joon Chang, Joo Hang Kim, Won Youn Lee, Byung Soo Kim, Sung Kyu Kim; J Korean Cancer Assoc. 1999;31(4):678-685.

Abstract PDF: PURPOSE
Oncogenes, tumor suppressor genes, and growth variables of tumors are important in the assessment of prognosis in lung cancer. The expression of PCNA, c-erbB-2 (HER-2/neu), and c-fos oncoprotein and their prognostic implications in surgically resected patients with non-small cell lung cancer were evaluated.
MATERIALS AND METHODS
Seventy patients with non-small cell lung cancer were included and PCNA, c-erbB-2 and c-fos overexpression were evaluated by immunohistochemical stain using paraffin-embedded tissue.
RESULTS
The mean proportion of PCNA positive cells was 18.6%, and there was no significant difference according to cell type and stage. The median survival time was significantly shorter in the group with high PCNA expression (>10%) as compared with the group with low PCNA expression (<10%) (37 months vs 16 months). Four (6.3%) of 64 cases demonstrated c-erbB-2 positivity. These were all adenocarcinoma cases. c-fos protein was only rarely overexpressed (1/51).
CONCLUSION
PCNA expression was shown to be a useful prognostic parameter in resected non-small cell lung cancer while c-erbB-2 and c-fos oncoprotein were infrequently expressed.

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Prognostic Significance of c-erbB2 , c-fos , p53 , Proliferating Cell Nuclear Antigen ( PCNA ) and Epidermal Growth Factor ( EGF: Seung Do Lee, Sung Uhn Baek, Chung Han Lee, Bang Hur, Man Ha Huh; J Korean Cancer Assoc. 1995;27(4):527-535.

Abstract PDF: To evaluate the prognostic significance of c-erbB2, c-fos, p53, PCNA and EGF in stage III gastric carcinoma, frequency of their expression was examined by immunohistochemical method in 206 cases of stage III gastric carcinomas with paraffin-embedded tissue specimens which were obtained surgically at the department of surgery, Kosin Medical College from 1984 to 1988. Survival rate and other clinicopathological parameters were analysed. Expression rates of c-erbB2, c-fos, p53, PCNA and EGF were 46.1%, 43.7%, 62.1%, 65.0% and 35.9% respectively. Correlation of expression was found betweer. EGF and c-fos, EGF and c- erbB2, and c-erbB2 and c-fos respectively. c-erbB2 expression was more frequently observed in intestinal type, well or moderately differentiated carcinomas than diffuse type, poorly differentiated or mucinous types(p<0.05). Similarly EGF expression rate was high in intestinal type and low in mucinous or signet ring cell types(p<0.05). Five year survival rates of positive cases and negative cases were 27.4% and 23.9% in c-erbB2, 27.7% and 23.9% in c-fos, 24.0% and 27.8% in p53, 25.1% and 26.4% in PCNA and 20.5% and 28.9% in EGF respectively. There were no significant differences between positive cases and negative cases in survival rates. When the above factors and conventiona1 prognostic fectors such es tumor depth(t3, t4), lymph node invasion(n0, nl, n2), number of positive nodes(l-3, 4-6, 7- ), Laurens types, were en- tered simultaneously into the Cox regression model, number of positive nodes, and RGF expression emerged as independent prognostic factors(p=0.0004, p=0.043 respectively).

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