Following our studies on the gastroprotective effect and cytotoxicity of terpene derivatives, new amides were prepared from the diterpene 8(17)-labden-15,19-dioic acid (junicedric acid) and its 8(9)-en isomer with C-protected amino acids (amino acid esters). The new compounds were evaluated for their gastroprotective effect in the ethanol/HCl-induced gastric lesions model in mice, as well as fo...

background: e-cadherin is a calcium-dependent molecule that contributes to intercellular adhesion. its proper functioning is important in the maintenance of epithelial structure and integrity. e-cadherin serves as a very important tumor suppressor. in this study, we aimâ to determineâ the frequencyâ of e-cadherin expression aberrancy and its relationship to theâ biologicalâ behavior of gastric ...

OBJECTIVE WZhet is a rearranged and partially deleted form of the Epstein-Barr virus (EBV) genome in which the BamH1W region becomes juxtaposed with and activates BZLF1, resulting in constitutive viral replication. We tested whether WZhet induces viral replication in epithelial cells, and we studied its prevalence in a wide range of lesional tissues arising in vivo. METHODS A quantitative rea...

Helicobacter pylori induces cell death by apoptosis. However, the apoptosis-inducing factor is still unknown. The virulence factor vacuolating cytotoxin A (VacA) is a potential candidate, and thus its role in apoptosis induction was investigated in the human gastric epithelial cell line AGS. The supernatant from the vacA wild-type strain P12 was able to induce apoptotic cell death, whereas the ...

Tetraspanins are cell-surface glycoproteins and have received attention recently as both suppressors and promoters of metastasis. CO-029 is a member of the tetraspanin family and is implicated to be a metastasis-promoting tetraspanin in some cancers. However, the role of CO-029 in gastric cancer remains unexplored. The present study aimed to investigate the expression of CO-029 in gastric cance...

To observe the expression of α-Enolase( ENO1) correlated with the pathological progression of gastric cancer and to investigate the effects of ENO1 down-regulation on the proliferative and migratory abilities of gastric cell lines in vitro. The expression of ENO1 was detected in 22 cases of gastric cancer, 20 cases of atypical hyperplasia and 18 cases of normal gastric tissues by immunohistoche...

The present study aimed to investigate the role of PTCH1 methylation in gastric carcinogenesis and the therapeutic effect of the methylation inhibitor, 5-aza-2'-deoxycytidine (5-aza-dC), in the treatment of gastric cancer. Total RNA was extracted from 20 gastric cancer tissues, their corresponding adjacent normal tissues and a gastric cancer AGS cell line. PTCH1 mRNA expression was detected by ...