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Prognostic significance of intraperitoneal cancer cells in gastric carcinoma: detection of cytokeratin 20 mRNA in peritoneal washes, in addition to detection of carcinoembryonic antigen.
- Source :
-
Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association [Gastric Cancer] 2005; Vol. 8 (3), pp. 142-8. - Publication Year :
- 2005
-
Abstract
- Background: In patients with gastric cancer, the presence of gastric cancer cells in the peritoneal cavity detected by cytologic examination, is a significant prognostic factor. A more sensitive, reverse transcriptase-polymerase chain reaction (RT-PCR) technique, amplifying carcinoembryonic antigen (CEA), was introduced as a new detection system, but produced some false-positive results. A search for other molecular markers is ongoing.<br />Methods: Peritoneal washes were obtained from 195 patients with gastric carcinoma during surgery. Cytokeratin 20 (CK20) mRNA levels were quantified, in addition to those of CEA, using the LightCycler, and the feasibility of CK20 as a target was evaluated.<br />Results: CK20 was limited, in terms of sensitivity, for detecting disseminated cancer cells (sensitivity, 63%; specificity, 91%; positive predictive value, 70%; and negative predictive value, 88%). Multimarker analysis was performed, in which samples positive for either CK20 or CEA mRNA were considered to be positive for cancer cells. Multivariate analysis identified the multimarker analysis as a significant independent prognostic determinant.<br />Conclusion: CK20 RT-PCR produced information that could add a significant impact to the knowledge obtained by CEA RT-PCR, although detection by CK20 alone was not sufficiently sensitive to replace CEA in the detection system.
- Subjects :
- Biomarkers, Tumor genetics
Biomarkers, Tumor metabolism
Carcinoembryonic Antigen metabolism
Humans
Intermediate Filament Proteins metabolism
Keratin-20
Lymphatic Metastasis diagnosis
Neoplasm Invasiveness diagnosis
Neoplasm Staging
Peritoneal Neoplasms metabolism
Peritoneal Neoplasms secondary
Prognosis
RNA, Neoplasm genetics
RNA, Neoplasm metabolism
Reverse Transcriptase Polymerase Chain Reaction
Sensitivity and Specificity
Stomach Neoplasms metabolism
Survival Rate
Carcinoembryonic Antigen genetics
Intermediate Filament Proteins genetics
Peritoneal Lavage
Peritoneal Neoplasms genetics
RNA, Messenger analysis
Stomach Neoplasms genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1436-3291
- Volume :
- 8
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association
- Publication Type :
- Academic Journal
- Accession number :
- 16086116
- Full Text :
- https://doi.org/10.1007/s10120-005-0318-7