ABSTRACT
Objective To investigate the relationship between chronic gastropathy with intestinal metaplasia (IM) and caudal type homeobox genes 2 (Cdx2),tumor necrosis factor-α (TNF-α),Helicobacter pylori (Hp) infection.Methods Onehundred and thirty patients underwent gastroscopy were divided into 2 groups by typical pathological type:gastritis group (30 cases) and IM group [100 cases,including mild IM group (30 cases),moderate IM group (35 cases),severe IM group (35 cases)].Hp infection was confirmed.The expressions of Cdx2 and TNF-α protein was evaluated by immunohistochemistry.Results The positive expression rates of Cdx2 and TNF-α protein in IM group were significantly higher than those in gastritis group [78.0％(78/100) vs.6.7％(2/30),60.0％(60/100) vs.16.7％(5/30)],and there were statistical differences (P ＜ 0.01).The positive expression rates of Cdx2 and TNF-α protein in positive and negative Hp infection in IM group were significantly higher than those in gastritis group [Cdx2 protein:79.4％(50/63) vs.1/10,75.7％(28/37) vs.5.0％(1/20);TNF-α:74.6％(47/63) vs.4/10,35.1％(13/37)vs.5.0％ (1/20)],and there were statistical differences (P ＜ 0.01).The positive expression rate of Cdx2 protein in moderate IM group and severe IM group were significantly higher than those in mild IM group [80.0％ (28/35) and 97.1％ (34/35) vs.53.3％ (16/30)],in severe IM group were significantly higher th.an those in moderate IM group,and there were statistical differences (P ＜0.05).There were no statistical differences in the positive expression rate of Cdx2 protein of difference Hp infection among the 4 groups (P＞0.05).There were no statistical differences in the positive expression rate of TNF-α protein between mile IM group and moderate IM group (P ＞ 0.05).The positive expression rate of TNF-α protein in severe IM group was significantly higher than that in mild IM group and moderate IM group [80.0％(28/35) vs.40.0％(12/30) and 57.1％(20/35)],and there were statistical differences (P ＜ 0.05).The positive expression rate of TNF-α protein of positive Hp infection patients in gastritis group,mild IM group,moderate IM group and severe IM group were significantly higher than those of negative Hp infection patients (4/10 vs.1/20,47/63vs.13/37,10/18 vs.2/12,15/21 vs.5/14,22/24 vs.6/11),and there were statistical differences (P ＜ 0.05).Conclusions The expressions of Cdx2 and TNF-α protein and Hp infection are closely related with IM.Therefore,testing the level of Cdx2 and TNF-α protein expressions can help to judge the degree of IM,which provides a basis for reversing IM.
ABSTRACT
Objective: To study the therapeutic effect of secondary lymphoid tissue chemokine (SLC) combined with CpG oligodeoxynucleotide (CpG-ODN) in treatment of implanted mouse melanoma and the possible mechanism. Methods: SLC-Fc fusion protein was prepared and its chemotaxis of lymphocytes was detected by chemotaxis assay. Implanted melanoma mouse models were established and randomly divided into 4 groups: control group, SLC-Fc group, CpG-ODN group, and SLC-Fc+CpG-ODN group. The growth of implanted tumors in each group was observed after treatment. Subtype and infiltration of lymphocytes in implanted tumor tissues were examined by flow cytometry. Results: SLC-Fc protein was successfully prepared, and it dose-dependently attracted lymphocytes (0.03, 0.3, and 3 μg/L). Intra-tumor injection SLC-Fc and CpG-ODN alone or in combination significantly inhibited growth of B16-implanted tumors. Tumor size in SLC-Fc+CpG-ODN group was significantly smaller than that in control group (P<0.01), and animals in SLC-Fc+CpG-ODN group survived longer. Tumor-infiltrated CD4~+ T, CD~8+ T, and dendritic cells (DCs) in SLC-Fc+CpG-ODN group were markedly increased as compared with those in control group (P<0.05), and tumor draining lymph nodes were dramatically enlarged. Conclusion: SLC combined with CpG-ODN can inhibit the growth of implanted melanoma by attracting CD4~+ T and CD8~+ T and promoting proliferation of DCs.
ABSTRACT
AIM: To study apoptosis and the involved genes in malignant transformation of gastric carcinoma. METHODS: Apoptotic cell and apoptotic regulating gene p53,bcl-2,c-myc were detected in 46 cases with gastric carcinomas, 20 cases with precancerous lesions and 24 cases with normal mucosa in situ using TdT-mediated dUTP-biotin nick end labeling (TUNEL) technique and immunohistochemical stain. RESULTS: Apoptotic index in precancerous lesion(intestinal metaplasia and dysplasia) and gastric carcinoma were significantly higher than that in normal mucosa( P