Expression and prognostic significance of APAF-1, caspase-8 and caspase-9 in stage II/III colon carcinoma: caspase-8 and caspase-9 is associated with poor prognosis
Apoptosis protease activating factor-1 (APAF-1), caspase-8 and caspase-9 are important factors in the execution of death signals. To study their prognostic influence in colon carcinoma, expression of APAF-1, caspase-8 and caspase-9 was determined by immunohistochemistry in normal colon mucosa (n = 8...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2010
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| In: |
International journal of cancer
Year: 2010, Volume: 127, Issue: 4, Pages: 873-880 |
| ISSN: | 1097-0215 |
| DOI: | 10.1002/ijc.25111 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/ijc.25111 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ijc.25111 
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| Author Notes: | Jörn Sträter, Ines Herter, Gaby Merkel, Ulf Hinz, Jürgen Weitz and Peter Möller |
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| 245 | 1 | 0 | |a Expression and prognostic significance of APAF-1, caspase-8 and caspase-9 in stage II/III colon carcinoma |b caspase-8 and caspase-9 is associated with poor prognosis |c Jörn Sträter, Ines Herter, Gaby Merkel, Ulf Hinz, Jürgen Weitz and Peter Möller |
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| 520 | |a Apoptosis protease activating factor-1 (APAF-1), caspase-8 and caspase-9 are important factors in the execution of death signals. To study their prognostic influence in colon carcinoma, expression of APAF-1, caspase-8 and caspase-9 was determined by immunohistochemistry in normal colon mucosa (n = 8) and R0-resected stage II/III colon carcinomas (n ≥ 124) using a semiquantitative score. Staining results were correlated with disease-free survival by Kaplan-Meier estimates, and multivariate Cox analyses were performed. In normal colon, APAF-1 and caspase-8 are most strongly expressed in the luminal surface epithelium, whereas caspase-9 is expressed all along the crypt axis. In colon carcinomas, there is considerable variability in the expression of these proapoptotic factors, although complete loss of caspase-8 and caspase-9 is rare. APAF-1 expression did not correlate with disease-free survival. Instead, both expression of caspase-9 and high-level expression of caspase-8 in a majority of tumor cells were significantly associated with adverse prognosis (p = 0.004 and p = 0.029, respectively). The influence of caspase-8 expression was mainly seen in patients with stage III colon carcinoma (p = 0.011), whereas the prognostic influence of caspase-9 expression was significant in stage II cases (p = 0.037) and just failed to be significant in stage III tumors (p = 0.0581). After adjusting for confounding factors in a multivariate Cox analysis, the effect of caspase-9 in predicting disease-free survival was confirmed (p = 0.003). Our data suggest that, in colon carcinomas, expression of caspase-8 and caspase-9 is significantly associated with poor survival. Caspase-9 may be an independent prognosticator in colon carcinoma. | ||
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