[Association of Omi/HtrA2 expression and prognosis in patients with gastric carcinoma].
OBJECTIVE
To explore the expression of serine protease Omi/HtrA2 in gastric carcinoma tissue and its association with clinicopathological features and prognosis.


METHODS
Omi/HtrA2 protein expression levels were detected by immunohistochemistry method in resected gastric carcinomas(n=68), adjacent noncancerous tissues(n=15), and normal tissues(n=15), and its association with clinicopathological features and prognosis were analyzed.


RESULTS
Omi/HtrA2 expression was positive in 73.5%(50/68) of gastric cancer tissues, which was significantly higher than that in adjacent noncancerous tissues and normal tissues(P<0.05). There were no significant differences in Omi/HtrA2 expression with respect to sex, age, tumor size, and depth of invasion(all P>0.05). Omi/HtrA2 expression level was significantly associated with tumor differentiation, extent of lymph node metastasis, and tumor stage(all P<0.05). Overall 5-year survival rate of patients with gastric carcinoma was 63.3%. Five-year survival rate was higher in Omi/HtrA2 positive cases than Omi/HtrA2 negative cases(72.0% vs. 61.1%), however the difference was not statistically significant.


CONCLUSIONS
Omi/HtrA2 expression is more common in gastric carcinoma. Omi/HtrA2 expression is associated with tumor differentiation, extent of lymph node metastasis, and tumor stage.
Chen
Hong-lei
HL
Department of Gastrointestinal Surgery and Colorectal Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
Chen
Chuang-qi
CQ
Ma
Jin-ping
JP
Cai
Shi-rong
SR
Wang
Zhao
Z
Yang
Wan
W
He
Yu-long
YL
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005753:Gastric Mucosa / Q000378:metabolism; D000074923:High-Temperature Requirement A Serine Peptidase 2; D006801:Humans; D008297:Male; D008875:Middle Aged; D024101:Mitochondrial Proteins / Q000235:genetics / Q000378:metabolism*; D009367:Neoplasm Staging; D011379:Prognosis; D012697:Serine Endopeptidases / Q000235:genetics / Q000378:metabolism*; D013270:Stomach / Q000473:pathology; D013274:Stomach Neoplasms / Q000378:metabolism* / Q000473:pathology*; D055815:Young Adult
D024101:Mitochondrial Proteins; D012697:Serine Endopeptidases; C000615914:HTRA2 protein, human; D000074923:High-Temperature Requirement A Serine Peptidase 2