Prognostic significance of MAGE in peritoneal washes in gastric carcinoma patients without peritoneal metastasis: results of a 5-year follow-up study.
OBJECTIVE
The RT-PCR assay of peritoneal washes has been used to predict peritoneal metastasis of gastric carcinoma. We used melanoma associated gene (MAGE) RT-PCR to detect peritoneal metastasis of gastric carcinoma after curative surgery and evaluated its clinical significance.


METHODS
Eighty-four peritoneal washes and 23 tumor and normal tissues were obtained from 84 gastric carcinoma patients. MAGE A1-A6 RT-PCR was carried out, and the results were evaluated according to their clinicopathologic characteristics. Five-year follow-up clinical studies were carried out periodically, and overall survival rates were retrospectively investigated using medical records.


RESULTS
For the paired tumor and normal tissues, MAGE expression rates were 65.2% and 4.3%, respectively. In peritoneal fluids, 11 cases (13.1%) revealed MAGE expression, and higher MAGE expression rates were observed with young age, deeper invasion, and advanced stages of tumor groups. MAGE-positive cases had much higher recurrence rates than MAGE-negative cases (45.5% vs. 9.6%, P<0.002). Among T-stage, N-stage, and MAGE expression; MAGE expression was determined to be the most important prognostic factor for overall survival rate by Cox proportional hazard model analysis.


CONCLUSIONS
MAGE RT-PCR results for peritoneal fluid disclosed significant associations with peritoneal recurrence of gastric carcinoma and proved to be the most important factor for overall survival rate in gastric carcinoma patients who had undergone radical resection.
Jeon
Chang-Ho
CH
Department of Laboratory Medicine, School of Medicine, Daegu Catholic University, Daegu, Korea.
Shin
Im-Hee
IH
Park
Jae-Bok
JB
Chae
Hyun-Dong
HD
D000328:Adult; D000368:Aged; D000951:Antigens, Neoplasm / Q000235:genetics*; D014408:Biomarkers, Tumor / Q000235:genetics*; D002277:Carcinoma / Q000235:genetics* / Q000276:immunology / Q000401:mortality / Q000556:secondary / Q000601:surgery; D016009:Chi-Square Distribution; D005260:Female; D005500:Follow-Up Studies; D005743:Gastrectomy; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000235:genetics*; D009367:Neoplasm Staging; D010533:Peritoneal Lavage; D010534:Peritoneal Neoplasms / Q000235:genetics* / Q000276:immunology / Q000401:mortality / Q000556:secondary; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018570:Risk Assessment; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000235:genetics* / Q000276:immunology / Q000401:mortality / Q000473:pathology / Q000601:surgery; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome
D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins