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BMC Cancer
Published in: BMC Cancer 1/2007

Open Access 01-12-2007 | Research article

The expression of HSP27 is associated with poor clinical outcome in intrahepatic cholangiocarcinoma

Authors: Antonello A Romani, Pellegrino Crafa, Silvia Desenzani, Gallia Graiani, Costanza Lagrasta, Mario Sianesi, Paolo Soliani, Angelo F Borghetti

Published in: BMC Cancer | Issue 1/2007

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Abstract

Background

The heat shock proteins (HSPs) 27-kDa (HSP27) and 72-kDa (HSP72), are ubiquitous chaperone molecules inducible in cells exposed to different stress conditions. Increased level of HSPs are reported in several human cancers, and found to be associated with the resistance to some anticancer treatments and poor prognosis. However, there is no study of the relationship between HSPs expression and patient's prognosis in intrahepatic cholangiocarcinoma (IHCCA). In this exploratory retrospective study, we investigated the expressions of HSP27 and HSP72 as potential prognostic factors in IHCCA.

Methods

Thirty-one paraffin-embedded samples were analyzed by immunohistochemical methods using HSP27 and HSP72 monoclonal antibodies. Proliferation rate was assessed in the same specimens by using monoclonal antibody against phosphorylated histone H3 (pHH3). Fisher's exact test was used to assess the hypothesis of independence between categorical variables in 2 × 2 tables. The ANOVA procedure was used to evaluate the association between ordinal and categorical variables. Estimates of the survival probability were calculated using the Kaplan-Meier method, and the log rank test was employed to test the null hypothesis of equality in overall survival among groups. The hazard ratio associated with HSP27 and HSP72 expression was estimated by Cox hazard-proportional regression.

Results

The expression of HSP27 was related to mitotic index, tumor greatest dimension, capsular and vascular invasion while the expression of HSP72 was only related to the presence of necrosis and the lymphoid infiltration. Kaplan-Maier analysis suggested that the expression of HSP27 significantly worsened the patients' median overall survival (11 ± 3.18 vs 55 ± 4.1 months, P-value = 0.0003). Moreover HSP27-positive patients exhibited the worst mean survival (7.0 ± 3.2 months) in the absence of concomitant HSP72 expression.

Conclusion

The expression of HSP27, likely increasing cell proliferation, tumor mass, vascular and capsular invasion, might promote aggressive tumor behaviour in IHCCA and decrease patients' survival. Immunohistochemical detection of HSP27 on routine sections may provide a reliable prognostic marker for IHCCA able to influence the therapeutic strategies for this cancer.
Appendix
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Metadata
Title
The expression of HSP27 is associated with poor clinical outcome in intrahepatic cholangiocarcinoma
Authors
Antonello A Romani
Pellegrino Crafa
Silvia Desenzani
Gallia Graiani
Costanza Lagrasta
Mario Sianesi
Paolo Soliani
Angelo F Borghetti
Publication date
01-12-2007
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2007
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-7-232

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