Key Laboratory of Carcinogenesis and Translational Research
Cao J.,Peking University |
Jin J.,Beijing Hospital |
Deng D.,Key Laboratory of Carcinogenesis and Translational Research |
Liu H.,Peking University
Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences | Year: 2016
METHODS: The hybrid capture (HC-II) was used to detect infection of HPV in 255 samples taken from 12 cases of healthy oral mucosa, 211 cases of patients with pathological diagnosis and 32 cases of patients with clinical diagnosis. The diagnosed cases included 8 cases of benign lesions of the oral mucosa, precancerous lesions [74 cases of oral leukoplakia (OLK) with hyperplasia and 42 cases of OLK with oral epithelial dysplasia (OED)], 91 cases of precancerous condition [oral lichen planus (OLP)] and 28 cases of oral squamous cell carcinoma (OSCC). And in situ hybridization (ISH) was used to detect infection of HPV in 33 cases of OSCC and 76 cases of OLK, including 30 cases of hyperplasia, 15 cases of mild OED, 15 cases of moderate OED and 16 cases of severe OED.RESULTS: The prevalence of HPV in OLP samples was higher (12.12%, 8/66) than that of OLK (2.59%, 3/116) (χ(2)=4.666, P=0.031) and OSCC(7.14%, 2/28, χ(2)=0.513, P=0.474). The prevalence of HPV in OSCC (7.14%, 2/28) was higher than that of OLK (2.59%, 3/116), and no significant difference was found. There was only one case of smoke spot and statistical analysis was not carried out. ISH was used to detect type 16/18 and type 31/33 HPV DNA in 109 cases of oral mucosal lesions in paraffin sections and only one case of OSCC was HPV positive. Thirty-seven cases were detected by HC-II and ISH methods at the same time. The same negative results by the two methods were found in 94.6% samples (35/37). In the other two samples, one was OSCC with early infiltration and the other was OLK with hyperplasia, The HC-II results were positive while the ISH results were negative. The patients with OLP and HPV testing results were followed up and the average follow-up period was (36.2 ± 10.5) months. It was found that three of them had a malignant transformation, and the malignant transformation rate of HPV positive patients was 12.50% (1/8), which was higher than that of HPV negative patients (3.45%, 2/58), and the difference was not statistically significant, P=0.249.CONCLUSION: HC-II assay was more sensitive in detecting HPV infection of oral mucosal lesions than ISH. The results of this study showed that there was insufficient evidence for taking HPV infection as a predictor of OLK carcinogenesis. Patients suffering from OLP were in a precancerous condition. The prevalence of HPV in OLP patients of this study was higher than that in OLK and OSCC patients, suggesting that for some reason, OLP patients were susceptible to HPV. HPV testing can be considered as routine in patients with OLP, and HC-II assay was recommended. And patients with OLP and HPV positive should be followed up regularly.OBJECTIVE: To investigate the possibility for human papillomavirus (HPV) infection to be a predictable signal for the carcinogenesis of oral mucosa by comparing the prevalences of HPV in each stage of oral mucosal carcinogenesis and to compare the sensitivity differences of the two methods in detecting HPV infection in oral cavity.
Pan W.,Peking University |
Cheng Y.,Peking University |
Zhang H.,Peking University |
Liu B.,Peking University |
And 12 more authors.
Scientific Reports | Year: 2014
Cytokines are soluble proteins that exert their functions by binding specific receptors. Many cytokines play essential roles in carcinogenesis and have been developed for the treatment of cancer. In this study, we identified a novel potential cytokine using immunogenomics designated colon-derived SUSD2 binding factor (CSBF), also known as chromosome 10 open reading frame 99 (C10orf99). CSBF/C10orf99 is a classical secreted protein with predicted molecular mass of 6.5 kDa, and a functional ligand of Sushi Domain Containing 2 (SUSD2). CSBF/C10orf99 has the highest expression level in colon tissue. Both CSBF/C10orf99 and SUSD2 are down-regulated in colon cancer tissues and cell lines with different regulation mechanisms. CSBF/C10orf99 interacts with SUSD2 to inhibit colon cancer cell growth and induce G1 cell cycle arrest by down-regulating cyclin D and cyclin-dependent kinase 6 (CDK6). CSBF/C10orf99 displays a bell-shaped activity curve with the optimal effect at ∼10 ng/ml. Its growth inhibitory effects can be blocked by sSUSD2-Fc soluble protein. Our results suggest that CSBF/C10orf99 is a novel potential cytokine with tumor suppressor functions.
Yu Y.,Key Laboratory of Carcinogenesis and Translational Research |
Yu Y.,Peking University |
Wu J.,Key Laboratory of Carcinogenesis and Translational Research |
Wu J.,Peking University |
And 15 more authors.
EMBO Reports | Year: 2012
Kindlin 2, as a focal adhesion protein, controls integrin activation. However, the association of Kindlin 2 with cancer-related signalling pathways is unknown. Here we identified a new direct interaction between Kindlin 2 and the active β-catenin. Importantly, Kindlin 2 forms a tripartite complex with β-catenin and TCF4. Mechanistically, Kindlin 2 selectively strengthens the occupancy of β-catenin on the Wnt target gene Axin2 and enhances Axin2 gene expression. Functionally, the β-catenin-Axin2-Snail cascade is required for Kindlin 2-induced tumour cell invasion. Our data indicate that Kindlin 2 is a new regulator of Wnt signalling, providing a mechanistic insight into the role of Kindlin 2 in cancer progression. © 2012 European Molecular Biology Organization.
Wang L.,Peking University |
Wang L.,Jilin University |
Du Y.,Key Laboratory of Carcinogenesis and Translational Research |
Lu M.,Peking University |
Li T.,Peking University
Nucleic Acids Research | Year: 2012
Protein lysine acetylation plays an important role in the normal functioning of cells, including gene expression regulation, protein stability and metabolism regulation. Although large amounts of lysine acetylation sites have been identified via large-scale mass spectrometry or traditional experimental methods, the lysine (K)-acetyl-transferase (KAT) responsible for the acetylation of a given protein or lysine site remains largely unknown due to the experimental limitations of KAT substrate identification. Hence, the in silico prediction of KAT-specific acetylation sites may provide direction for further experiments. In our previous study, we developed the acetylation set enrichment based (ASEB) computer program to predict which KAT-families are responsible for the acetylation of a given protein or lysine site. In this article, we provide KAT-specific acetylation site prediction as a web service. This web server not only provides the online tool and R package for the method in our previous study, but several useful services are also included, such as the integration of protein-protein interaction information to enhance prediction accuracy. This web server can be freely accessed at http://cmbi.bjmu.edu.cn/ huac. © 2012 The Author(s).
PubMed | Key Laboratory of Carcinogenesis and Translational Research and Peking University
Type: | Journal: Oncotarget | Year: 2016
The aim of this study is trying to describe more details of superior mesenteric artery margin in pancreaticoduodenectomy for pancreatic ductal adenocarcinoma, to evaluate biological and prognostic implications of tumor budding in this margin, and to provide more evidence for evaluation of R0 surgery in pancreaticoduodenectomy. 46 patients in 5-years period are included in this study. Immunochemistry and immunofluorescence are used to analyze tumor budding and epithelial-mesenchymal transition. Superior mesenteric artery margin might be described from four aspects including location, gross appearance, microscopic appearance and tumor budding. We find that 1mm rule for R1 surgery is more appropriate to predict prognosis (P = 0.009) than 0mm rule (P = 0.141). Expression of cytokeratin in tumor budding is significantly lower than primary tumor (P = 0.001), and it suggests that tumor budding may participate the procedure of epithelial-mesenchymal transition. High-grade tumor budding and decreasing cytokeratin of tumor budding correlate with distant metastasis and has negative influence on prognosis. So superior mesenteric artery margin might be not only an area that tumor cells may invade, but also a pathway for distant metastasis. It is necessary to evaluate superior mesenteric artery margin in pancreaticoduodenectomy for pancreatic cancer.
PubMed | Key Laboratory of Carcinogenesis and Translational Research, Laboratory of Molecular Cell Biology and Tumor Biology and Peking University
Type: | Journal: OncoTargets and therapy | Year: 2016
Recent studies showed that muscarinic acetylcholine receptor 3 (M3), as a muscarinic acetylcholine receptor family member that plays an important role in normal physiological function, is engaged in cancer progression. However, the role of M3 in pancreatic ductal adenocarcinoma (PDAC) is not known. The aim of this study is to investigate the expression and prognostic value of M3 in patients with PDAC.The localization and expression of M3 in PDAC were examined by immunohistochemistry. VAChT was employed to detect parasympathetic nerve fibers in the corresponding M3 PDAC tissues. The correlation between M3 expression and patients survival was assessed by Kaplan-Meier analysis.M3 was discovered predominantly localized in the cell cytoplasm and expressed in all specimens of PDAC patients. Significant correlation was noted between increased M3 intensity and high grade of PDAC (High expression of M3 is a prognostic marker for PDAC.
Deng Q.J.,Key Laboratory of Carcinogenesis and Translational Research |
Wang C.Y.,Hua County Bureau of Health |
Li F.L.,Hua County Peoples Hospital
Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences | Year: 2013
To determine the epidemiological characteristics and associated risk factors of hepatitis B surface antigens (HBsAg) prevalence in rural areas of Hua County, Henan Province, and to provide scientific evidence for Hepatitis B prevention and control in local areas. On the basis of an ongoing esophageal cancer cohort study in rural Anyang, a total of 5 104 subjects aged 25-65 years were clustered and selected from 5 targeted villages for this study in rural areas of Hua County, Henan Province. HBsAg was detected in their blood samples and a questionnaire was completed by all the subjects in a manner of one-on-one interview. All statistical analyses were conducted using SPSS for Windows version 13.0. Of the 5 104 studied subjects (overall participation rate: 92.05%), 5.17% were positive for HBsAg. The detection rate was significantly higher in males than in females (6.54% vs. 3.87%, P<0.001) and the highest detection rates were observed in the 25-29 and 55-59 years groups in both males and females. Multiple Logistic analyses showed unmarried status (OR=1.80, 95% CI: 1.00-3.25) and high frequency of sexual intercourse (Ptrend=0.049) were associated with higher the risk for hepatitis B virus (HBV) infection. The prevalence of HBsAg in rural Hua County, Henan Province, was slightly lower than the national average of the same time period. More attention should be attached to high risk groups of HBV infection in this population, i.e. males aged 25-29 years and 55-59 years and sexually active population. Immunization and health education projects against hepatitis B should be carried out in this population to further reduce the overall prevalence of hepatitis B.
Wu X.-J.,Key Laboratory of Carcinogenesis and Translational Research |
Miao R.-L.,Key Laboratory of Carcinogenesis and Translational Research |
Li Z.-Y.,Key Laboratory of Carcinogenesis and Translational Research |
Bu Z.-D.,Key Laboratory of Carcinogenesis and Translational Research |
And 8 more authors.
European Journal of Surgical Oncology | Year: 2015
Background: Gastric cancer is one of most common malignancies in the world. Currently the prognostic prediction is entirely based on the TNM staging system. In this study, we evaluated whether metastatic lymph node ratio (rN) at the time of surgery would improve the prognostic prediction in conjunction with the TNM staging system. Methods: This retrospective study includes 745 patients, who had been referred for surgery due to gastric cancer between 1995 and 2007 and had at least 15 lymph nodes examined at the time of surgery without preoperative treatment. Clinicopathologic features and overall survival were analyzed using univariate and multivariate modes to identify the risk factors for overall survival. Results: Median overall survival of all patients analyzed is 57.8 months and 5-year overall survival is 49.5%. Tumor site, macroscopic type, pTNM stage, and rN stage are identified as independent prognostic factors. Increased positive lymph node ratio correlates with shorter survival in all patients and in each T and N stage. In stage III gastric cancer patients, rN stage shows additional prognostic value on overall survival (p < 0.001). Conclusions: rN stage is a simple and promising prognostic factor of gastric cancer after surgery in addition to the TNM stage system especially in stage III patients. But the independent prognostic value of rN stage in stage I, II and IV gastric cancer is yet to be determined. © 2015 Elsevier Ltd. All rights reserved.
Huang H.,Key Laboratory of Carcinogenesis and Translational Research |
Han Y.,Key Laboratory of Carcinogenesis and Translational Research |
Wu J.,Key Laboratory of Carcinogenesis and Translational Research |
Tian Z.,Key Laboratory of Carcinogenesis and Translational Research |
And 2 more authors.
Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences | Year: 2014
OBJECTIVE: To identify chemoresistance-associated secretory proteins by proteomic approaches, and to provide the basis for selecting suitable chemotherapy in gastric cancer treatment.METHODS: Drug resistant cell lines were established by gradient drug treatment with MGC-803 gastric cancer cells. The secreted proteins of MGC-803 parental and resistant cells were collected from the conditional medium without serum and separated by two-dimensional gel electrophoresis (2-DE).The proteins were analyzed by PD Quest 7.1.0 software and identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS). Real-time RT-PCR was performed to confirm the difference of expression on the mRNA level.RESULTS: The 5-fluorouracil (5FU), paclitaxel (TA) and cisplatin (DDP)-resistant gastric cancer cell lines with the resistance indexes of 110.6, 70.0 and 13.3 respectively, were established successfully. DDP-resistant cells had strong cross-resistance to 5FU and TA, and the resistance indexes were 23.5 and 114.0. 5FU-resistant cells also had strong cross-resistance to TA with the resistance index 70.0. The 2-DE patterns of protein component spectra from the conditional medium were obtained with 18 proteins whose abundances were increased in all chemoresistance cells for more than 2-fold, 13 of which were identified by mass spectrometry, including protease and proteins involved in signal transduction. Compared with the parental cell MGC-803, SLMAP, TOP3A, DYNC1H1, RHPN1, PUF60 and SIAH1 were significantly up-regulated in three drug resistant cells, IFT172 and FILIP were up-regulated in 5FU-resistant and TA-resistant cells, PLVAP and LMNA were up-regulated in TA- and DDP-resistant cells. Further validation revealed that SIAH1 protein was enriched in cell lysates and the conditional medium from all the drug resistant cells.CONCLUSION: By establishing the 5FU-,TA- and DDP-resistant gastric cancer cell lines and assisted by 2-DE and mass spectrometry, we demonstrated the different secretory protein profiling and found that SIAH1 had significantly increased in both cell lysates and the conditional medium of the drug-resistant cells, which are potential candidates for developing chemoresistance markers in sera from gastric cancer patients.
PubMed | Key Laboratory of Carcinogenesis and Translational Research
Type: Journal Article | Journal: EMBO reports | Year: 2012
Kindlin 2, as a focal adhesion protein, controls integrin activation. However, the association of Kindlin 2 with cancer-related signalling pathways is unknown. Here we identified a new direct interaction between Kindlin 2 and the active -catenin. Importantly, Kindlin 2 forms a tripartite complex with -catenin and TCF4. Mechanistically, Kindlin 2 selectively strengthens the occupancy of -catenin on the Wnt target gene Axin2 and enhances Axin2 gene expression. Functionally, the -catenin-Axin2-Snail cascade is required for Kindlin 2-induced tumour cell invasion. Our data indicate that Kindlin 2 is a new regulator of Wnt signalling, providing a mechanistic insight into the role of Kindlin 2 in cancer progression.