ABSTRACT
Thrombospondin (THBS) 2, as a member of the THBS family, is expressed in a variety of tumor cells and has important significance in the development and metastasis of tumors. In recent years, studies have reported that the specific role of THBS2 in different tumors is different, and it participates in a variety of biological processes, such as cell apoptosis, wound healing, angiogenesis and inflammation. At present, the role of THBS2 in tumorigenesis, development, and prognosis is not completely clear. Exploring the abnormal expression and mechanism of THBS2 in tumors is expected to provide a new method for tumor diagnosis and treatment.
ABSTRACT
Objective@#To explore the potential mechanism of pimecrolimus in airway remodeling of atopic dermatitis (AD) and asthma mice.@*Methods@#Female BALB/c mice were randomly divided into three groups: control group, atopic dermatitis group and pimecrolimus treatment group. The cell in bronchoalveolar lavage fluid (BALF) was calculated by Ray-Jimsa staining. The structural changes in lung tissue and skin tissue were observed by hematoxylin-eosin (HE) staining, and the level of interleukin (IL)-33, IL-5, IL-13 in serum was detected by enzyme-linked immunosorbent assay (ELISA). The expressions of type 1 collagen (Col1) in the airway of mice were detected by RT-PCR and Western blotting. And western blotting was also used to determine the activation of mitogen-activated protein kinase P38 (P38MAPK) and mitogen-and stress-activated protein kinase 1 (MSK1) in the lungs of mice.@*Results@#Compared with those in the control group, the total number of leukocytes in bronchoalveolar lavage fluid (BALF) and the expression levels of IL-33, IL-13 and IL-5 in serum of atopic dermatitis group were significantly higher, and the difference was statistically significant (P < 0.05). In the atopic dermatitis group, the phosphorylation of P38MAPK and MSK1 protein was increased (1.50 ± 0.43 vs. 0.80 ± 0.43, 1.39 ± 0.08 vs. 0.62 ± 0.08) and the expression of Col1 protein and protein (1 vs. 3.20 ± 0.59, 1.40 ± 0.12 vs. 0.13 ± 0.16) was increased, and the difference was statistically significant (P < 0.05). After pimecrolimus treatment, the number of leukocytes in BALF, the levels of IL-33, IL-5 and IL-13 in serum (213.13 ± 11.89, 657.97 ± 86.47, 143.82 ± 33.02), the phosphorylation of P38MAPK and MSK1 protein in lung tissue (0.10 ± 0.04, 0.85 ± 0.05), and the expression of Col1 mRNA and Col1 protein were decreased (0.61 ± 0.22, 0.48 ± 0.08), and the difference was statistically significant (P < 0.05). The edema of lung and skin tissue and the infiltration of inflammatory cells were alleviated.@*Conclusions@#Pimecrolimus can alleviate the inflammation and airway remodeling in mice by inhibiting the activation of IL-33 related pathways, thereby reducing the incidence of asthma.
ABSTRACT
Hilar cholangiocarcinoma is a common bile duct cancer.The radical resection rate of end-stage malignancies reported in literature is about 20％.Half of the patients have lost the chance of operation at the time of care,while the average survival time in the patients who can not be operated is about six months.Therefore,for most patients,looking for a palliative treatment which can prolong the survival time is particularly important.From June 2013 to June 2014,our hospital applied iodine-125 brachytherapy,to treat 7 patients with unresectable hilar cholangio carcinoma.All the patients are still alive,the average survival time of 7 patients is 5.2 months up to now,with median survival time being 7.8 months,and longest survival time being 12 months.With good outcomes,few complications,as well as significantly prolonged survival time,iodine125 brachytherapy is regarded with broad clinical applications.
ABSTRACT
<p><b>OBJECTIVE</b>To study genome-wide gene expression changes in gastric cancer cells after iodine-125 ¹²⁵(I) particle irradiation.</p><p><b>METHODS</b>¹²⁵I particles were used to irradiate three gastric cancer cell lines of various differentiation levels:high (BGC-823) , medium (AGS) and low (NCI-N87) .Whole-genome gene expression was investigated with microarray. The gene expression in iodine-125 irradiated and untreated cancer cells was compared, and the genes with transcript levels altered for at least 2 folds (P < 0.05) were selected. The change in gene expression levels was verified by using quantitative real-time (qRT) -PCR.</p><p><b>RESULTS</b>The three gastric cancer cell lines received the same dose rate of ¹²⁵I particle irradiation. Cluster analysis showed that the Gene Ontology (GO) categories did not change in the three cell lines, but changes in gene expression levels were evident for many genes. After ¹²⁵I particle irradiate NCI-N87 cells, 895 genes were up-regulated, 786 genes were down-regulated; AGS was irradiated by ¹²⁵I seed, there were 124 genes upregulated, 161 genes were down-regulated; BGC-823 cells were treated by ¹²⁵I seed irradiation, 2 412 genes upregulated, 3 243 downregulated genes. After ionizing radiation can cause very complex transcriptional regulation changes, KEGG pathway analysis shows that these differentially expressed genes overlap in a particular cell pathway. Four genes, TRAF3IP2-AS1, SDC1, RABL2B and NOM, were found having at least 2-fold difference in expression (P < 0.05) , and the gene expression alteration was confirmed by qRT-PCR.</p><p><b>CONCLUSIONS</b>¹²⁵I particle irradiation caused gene expression changes in gastric cancer cells. The expressions of TRAF3IP2-AS1, SDC1, RABL2B and NOM are altered significantly in all three cell lines studied, indicating that these genes may play an important role in the ¹²⁵I seed treatment of gastric cancer. These genes could be potential targets for developing anti-cancer drugs in the future.</p>