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Prognostic role of sensitive-to-apoptosis gene expression in rectal cancer

World Journal of Gastroenterology 2011年第44期17卷 4905-4910页

作者： Sevgi A Ozden Hazan Ozyurt Zerrin Ozgen olca kilinc Mustafa Oncel Aylin E Gul Nimet Karadayi Nedime Serakinci Beki Kan Oya Orun Clinic of Radiation Oncology Dr.Lütfi K|rdar Kartal Education and Research Hospital Clinic of Radiation Oncology Medical Park Department of Biophysics Marmara University School of Medicine Clinic of Surgery Dr.Lütfi K|rdar Kartal Education and Research Hospital Department of Pathology Dr. Lütfi K|rdar Kartal Education and Research Hospital Telomere Aging Group Center for IRSSouthern Denmark University Faculty of Medicine Near East University Department of Biophysics Ac badem University School of Medicine

AIM:To investigate the association between prognosis of rectal cancer treated with chemoradiotherapy(CRT) and expression of sensitive-to-apoptosis(SAG),B-cell lymphoma-extra large(Bcl-X L) and Bcl-2 homologous antagonist/killer(Bak).METHODS:Real-time quantitative polymerase chain reaction was used to determine the expression of proteins of interest,namely SAG,Bcl-X L,Bak and β-actin,in rectal carcinoma patients who had a follow-up period of 3 years after *** specimens were excised from the rectal tumor preceding ***:SAG,Bcl-X L and Bak proteins showed significant correlations with each *** multivariate analysis,patients with high vs low SAG expression showed a statistically significant difference in 2-year survival rates:56% vs 73%,respectively(P = 0.056).On the other hand,there were no significant correlations between the expression levels of all three genes and metastatic rates or tumor responses to *** overall survival in the patients with elevated SAG expression was 27.1 mo ± 3.9 mo [95% confidence interval(CI):19.3-34.9],and in patients with reduced expression,it was 32.1 mo ± 2.5 mo(95% CI:27.3-36.9).The corresponding values for Bcl-X L were 28.0 mo ± 4.1 mo(95% CI:19.9-36.1) and 31.7 mo ± 2.9 mo(95% CI:26.0-37.5),and those for Bak were 29.8 mo ± 3.7 mo(95% CI:22.5-37.2) and 30.6 mo ± 2.4 mo(95% CI:25.5-35.0),***:Two-year survival rates significantly correlated with low SAG expression,and SAG may be a candidate gene for good prognosis,independent of therapeutic response of different individuals.

关键词： Sensitive-to-apoptosis gene Sensitive-toapoptosis Rectal cancer B-cell lymphoma-extra large Bcl-2 homologous antagonist/killer Apoptosis

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