Abstract:
AIM:To investigate let-7a expression and analyze the correlation between let-7a and progression of gastric mucosa cancerization. METHODS:The tissue microarray was constructed previously in 52 cases of human gastric carcinoma, 17 cases of chronic atrophic gastritis (atypical hyperplasia) and 11 cases of normal gastric tissue, and tissue microarrays combined with in situ hybridization were used to detect the expression of let-7a. RESULTS:The positive rates of let-7a in normal gastric tissue, chronic atrophic gastritis and gastric carcinoma were 90.9%, 88.2% and 86.5%, respectively, without significant differences among the groups (P > 0.05). However, an intense signal of let-7a was observed in gastric epithelial cells, whereas a less intense signal was found in gastric atypical hyperplasia epithelial cells and a weak signal in gastric carcinoma epithelial cells. The expression of let-7a decreased along with the progression of gastric mucosa cancerization (P < 0.05). In the group of gastric carcinoma, the expression of let-7a was even significantly lower in gastric carcinomas with lymph node metastasis than in those without metastasis (P < 0.05). CONCLUSION:Gastric carcinoma has relatively lower expression of let-7a. Reduced let-7a may be a fundamental factor in the formation and lymph node metastasis of gastric carcinoma.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Zhu YM,Zhong ZX,Liu ZMdoi
10.3748/wjg.v16.i26.3325subject
Has Abstractpub_date
2010-07-14 00:00:00pages
3325-9issue
26eissn
1007-9327issn
2219-2840journal_volume
16pub_type
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