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Expression of the KAI1 metastasis suppressor gene in non-metastatic versus metastatic human colorectal cancer.
- Source :
-
Anticancer research [Anticancer Res] 2002 Nov-Dec; Vol. 22 (6A), pp. 3337-42. - Publication Year :
- 2002
-
Abstract
- Background: The importance of KAI1 to colorectal cancer (CRC) progression is unclear, with conflicting data regarding changes in KAI1 expression during tumour progression.<br />Materials and Methods: In situ hybridisation and immunohistochemistry, with a semiquantitative scoring system, were used to assess KAI1 mRNA and protein levels, respectively, in normal colon samples (43), and non-metastatic (24) or metastatic (33) primary cancers, and liver metastases (48).<br />Results: There was significant loss of KAI1 mRNA and protein staining in non-metastatic primary tumours versus normal tissues (Bonferroni, p < 0.05) but levels recovered to near normal in metastatic primary tumours and liver metastases. Increased KAI1 expression significantly correlated with distant metastases (Mann-Whitney, p = 0.0001, mRNA; p = 0.033, protein), cancer-specific survival (Cox regression analysis p = 0.0002, mRNA; 0.0493, protein) and overall patient survival (p = 0.0001, mRNA). Multivariate analysis (Cox proportional hazards model) confirmed high KAI1 mRNA expression was an independent prognostic indicator of distant metastasis (p < 0.0001), cancer-specific survival (p < 0.0001) and overall patient survival (p < 0.0001).<br />Conclusion: These data indicate a complex relationship between KAI1 and progression of human CRC, in which expression is reduced in localised primary tumours, but regained in disease associated with metastasis.
- Subjects :
- Analysis of Variance
Colorectal Neoplasms metabolism
Gene Expression
Humans
Immunohistochemistry
In Situ Hybridization
Kangai-1 Protein
Liver Neoplasms metabolism
Membrane Glycoproteins biosynthesis
Paraffin Embedding
Predictive Value of Tests
RNA, Messenger biosynthesis
RNA, Messenger genetics
Survival Rate
Antigens, CD
Colorectal Neoplasms genetics
Colorectal Neoplasms pathology
Genes, Tumor Suppressor
Liver Neoplasms genetics
Liver Neoplasms secondary
Membrane Glycoproteins genetics
Proto-Oncogene Proteins
Subjects
Details
- Language :
- English
- ISSN :
- 0250-7005
- Volume :
- 22
- Issue :
- 6A
- Database :
- MEDLINE
- Journal :
- Anticancer research
- Publication Type :
- Academic Journal
- Accession number :
- 12530084