Zhang W.-J.,Xi'an Jiaotong University |
Zhang W.-J.,Third Hospital of Chengdu |
Sui Y.-X.,Xi'an Jiaotong University |
Budha A.,Xi'an Jiaotong University |
And 5 more authors.
World Journal of Gastroenterology | Year: 2012
AIM: To develop an affinity peptide that binds to gastric cancer used for the detection of early gastric cancer. METHODS: A peptide screen was performed by biopanning the PhD-12 phage display library, clearing non-specific binders against tumor-adjacent normal appearing gastric mucosa and obtaining selective binding against freshly harvested gastric cancer tissues. Tumortargeted binding of selected peptides was confirmed by bound phage counts, enzyme-linked immunosorbent assay, competitive inhibition, fluorescence microscopy and semi-quantitative analysis on immunohistochemistry using different types of cancer tissues. RESULTS: Approximately 92.8% of the non-specific phage clones were subtracted from the original phage library after two rounds of biopanning against normalappearing gastric mucosa. After the third round of positive screening, the peptide sequence AADNAKTKSFPV (AAD) appeared in 25% (12/48) of the analyzed phages. For the control peptide, these values were 6.8 ± 2.3, 5.1 ± 1.7, 3.5 ± 2.1, 4.6 ± 1.9 and 1.1 ± 0.5, respectively. The values for AAD peptide were statistically significant (P < 0.01) for gastric cancer as compared with other histological classifications and control peptide. CONCLUSION: A novel peptide is discovered to have a specific binding activity to gastric cancer, and can be used to distinguish neoplastic from normal gastric mucosa, demonstrating the potential for early cancer detection on endoscopy. © 2012 2012 Baishideng. All rights reserved.
Zhang H.-T.,Third Hospital of Chengdu |
Zhang H.-T.,Peoples Hospital Of Dege County |
Gao L.,Third Hospital of Chengdu |
Ye Y.,Third Hospital of Chengdu |
And 3 more authors.
Chinese Journal of Evidence-Based Medicine | Year: 2015
Objective: To investigate the association between local population’s lifestyle and the morbidity of cerebral stroke in Ganzi Tibetan state, so as to provided references for preventing stroke in the local region.Methods: A representative population sample (including residents, farmers and herdsmen) of Kangding, Dege, Ganzi, Litang and Batang county was selected through randomized cluster sampling from September 2010 to June 2012. Data including lifestyle, housing conditions and stroke status were collected using a questionnaire. Then statistic analysis was performed using SPSS 19.0 software.Results: A total of 7 038 cases were investigated, of which 125 cases with cerebral stroke were found. The morbidity of stroke was 1 923/100 000. Smoking, alcohol drinking, excessive intake of salt and overweight were positively associated with the risk of cerebral stroke, while appropriate physical exercise was negatively associated with cerebral stroke. Housing conditions and height above sea level were not obviously associated with cerebral stroke.Conclusion: The prevalence of cerebral stroke is high in Ganzi Tibetan state, which is related to special local population’s lifestyle. It is very important to reinforce the work for the prevention and control of stroke. © 2015 Editorial Board of Chin J Evid-based Med.
Yuan Y.-Q.,Third Hospital of Chengdu |
Hou M.,Third Hospital of Chengdu |
Wu H.,Third Hospital of Chengdu |
Wang F.,Third Hospital of Chengdu
Brain Tumor Pathology | Year: 2012
Meningiomas are common, typically benign intracranial neoplasms with well-demarcated borders. Meningiomas with indistinct boundaries have been reported. These can invade surrounding structures, and present surgical and diagnostic challenges. We present the case of an unusual meningioma in a 53-year-old male in which preoperative magnetic resonance imaging (MRI) revealed an irregular lesion with clear boundaries and peripheral rim enhancement. Intraoperatively, however, no cleavage plane was apparent. Histological examination showed an increase of fibroconnective tissue with proliferation of dilated vessels in the periphery of the tumor concordant with the rim. Immunohistochemical staining of the tumor was positive for EMA and CD34, but negative for CEA, Ki67, and GFAP. Immunohistochemical staining of proliferating vessels in the periphery of the tumor was positive for CD34. A so-called 'capsule' structure was suggested according to MRI findings and pathological examination. The tumor was diagnosed as a mixed type meningioma, WHO grade I. © 2012 The Japan Society of Brain Tumor Pathology.
Lin W.,University of Sichuan |
Lin W.,Third Hospital of Chengdu |
Zhang W.,University of Sichuan |
Zhang J.,University of Sichuan |
And 2 more authors.
Journal of Cranio-Maxillofacial Surgery | Year: 2014
This study was to investigate whether surgically created incisions in discs at different sizes would heal spontaneously. Thirty mature goats were randomly divided into group A (1 mm), group B (3 mm) and group C (5 mm) according to the length of incision on the discs. Five animals in each group were sacrificed at 3 and 6 months postoperatively. The disc and condyle were evaluated by gross, histological and immunohistochemistry examinations. 1-mm discal incisions healed spontaneously with nearly normal gross and histological appearance at 6 months postoperatively, while 3-mm and 5-mm discal incisions failed to heal. Degenerative changes were observed in the fibrocartilage in both 3-mm and 5-mm incision groups, with a greater extent in the 5-mm group. Our results suggested that the TMJ disc of goat has limited self-repair capability to damage, which will be useful for making pre-surgical decisions related to the size and healing period of TMJ disc perforations. © 2014 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.
Zheng J.-B.,Xi'an Jiaotong University |
Qiao L.-N.,Xi'an Jiaotong University |
Sun X.-J.,Xi'an Jiaotong University |
Qi J.,Shaanxi Provincial Peoples Hospital |
And 6 more authors.
Molecular Medicine Reports | Year: 2015
Caudal-related homeobox transcription factor 2 (CDX2) is a transcription factor, which is specifically expressed in the adult intestine. It is essential for the development and homeostasis of the intestinal epithelium and its functions as a tumor suppressor have been demonstrated in the adult colon. The present study aimed to examine the inhibitory effects of the overexpression of CDX2 on subcutaneously-transplanted tumors, derived from LoVo colon cancer cells, in nude mice, and to provide experimental evidence for the biotherapy of colon cancer. A pEGFP-C1-CDX2 eukaryotic expression vector was transfected into the LoVo cells via lipofection, and LoVo cells stably-expressing CDX2 (pEGFP-C1-CDX2 cells) were obtained using G418 selection. A nude mouse subcutaneously-transplanted tumor model was established by inoculating the nude mice with the pEGFP-C1-CDX2 cells, and the effects of overexpression of CDX2 on transplanted tumor growth in the LoVo cells were observed. Western blotting results demonstrated that the protein expression of CDX2 in the LoVo cells was higher in the pEGFP-C1-CDX2 cell group, compared with that in the pEGFP-C1 cell group and the untreated cell group. At 20 days post-inoculation with either pEGFP-C1-CDX2 or pEGFP-C1, the transplanted tumor masses were significantly lower in the pEGFP-C1-CDX2 group, compared with those in the pEGFP-C1 and untreated groups. Immunohistochemistry revealed that the expression levels of CDX2 and matrix metalloproteinase-2 (MMP-2) were detected in each group, and the protein expression of CDX2 was increased in the tumor tissues from the nude mice in the pEGFP-C1-CDX2 group. However the expression of MMP-2 was downregulated in the tumor tissues of the nude mice in the pEGFP-C1-CDX2 group. Taken together, these data suggested that pEGFP-C1-CDX2 cells exhibited suppressed tumor growth in vivo. Overexpression of CDX2 was observed in transplanted tumors in the pEGFP-C1-CDX2 group, and the gene expression of MMP-2 was reduced. These results indicate that CDX2 inhibited the growth of colorectal tumor cells, possibly by downregulating the gene expression.