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Increased Expression of Galectin-1 in Carcinoma-Associated Stroma Predicts Poor Outcome in Prostate Carcinoma Patients
van den Brule, Frederic; Waltregny, David; Castronovo, Vincenzo
2001In Journal of Pathology, 193 (1), p. 80-7
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Abstract :
[en] Galectin-1, a member of the beta-galactoside-binding galectin family, is a pleiotropic dimeric protein participating in a variety of normal and pathological processes, including cancer progression. Modulation of the interactions with the basement membrane glycoprotein laminin and induction of apoptosis in activated T lymphocytes are well-known functions of this galectin. In this study, the expression of galectin-1 was examined in 148 human primary prostate carcinoma samples. Immunohistochemical staining of paraffin sections of prostate tissues revealed that galectin-1 was not detected in normal, PIN (prostatic intraepithelial neoplasia) or carcinoma cells, but accumulated in the stroma and associated fibroblasts. Galectin-1 expression was significantly increased in the tumour-associated stroma compared with the non-neoplastic gland-associated stroma in 21.3% of the cases (Mantel-Haenszel test, p=0.001; Wilcoxon signed rank test, p<0.0001). Increased galectin-1 expression in the cancer-associated stroma compared to the normal gland-associated stroma (p=0.03) was identified by multivariate analysis as a strong independent predictor of prostate-specific antigen (PSA) recurrence, just after the pathological stage (p<0.0001). The association between accumulation of galectin-1 in the stroma of the malignant tissue and aggressiveness of the tumour adds weight to the body of evidence that identifies a role for galectin-1 in the acquisition of the invasive phenotype. In addition to modulating cancer cell interactions with laminin, galectin-1 accumulated around the cancer cells may act as an immunological shield by inducing activated T-cell apoptosis. This exciting hypothesis warrants further investigation.
Disciplines :
Oncology
Author, co-author :
van den Brule, Frederic
Waltregny, David  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Labo de recherche sur les métastases
Castronovo, Vincenzo ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie générale et cellulaire
Language :
English
Title :
Increased Expression of Galectin-1 in Carcinoma-Associated Stroma Predicts Poor Outcome in Prostate Carcinoma Patients
Publication date :
January 2001
Journal title :
Journal of Pathology
ISSN :
0022-3417
eISSN :
1096-9896
Publisher :
John Wiley & Sons, Chichester, United Kingdom
Volume :
193
Issue :
1
Pages :
80-7
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 January 2009

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