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      • KCI등재

        Using low-coverage whole genome sequencing technique to analyze the chromosomal copy number alterations in the exfoliative cells of cervical cancer

        Tong Ren,Jing Suo,Shikai Liu,Shu Wang,Shan Shu,Yang Xiang,Jing-He Lang 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.5

        Objectives: We analyzed the chromosomal-arm-level copy number alterations (CNAs) in the cervical exfoliative cell and tissue samples by using the low-coverage whole genomic sequencing technique. Methods: In this study, we retrospectively collected 55 archived exfoliated cervical cell suspension samples and the corresponding formalin-fixed and paraffin-embedded tissue section samples including 27 invasive cervical cancer and 28 control cases. We also collected 19 samples of the cervical exfoliative cells randomly from women to verify the new algorithm model. We analyzed the CNAs in cervical exfoliated cell and tissue samples by using the low-coverage next generation of sequencing. Results: In the model-building study, multiple chromosomal-arm-level CNAs were detected in both cervical exfoliated cell and tissue samples of all cervical cancer cases. By analyzing the consistency of CNAs between exfoliated cells and cervical tissue samples, as well as the heterogeneity in individual patient, we also established a C-score algorithm model according to the chromosomal-arm-level changes of 1q, 2q, 3p, 7q. The C-score model was then validated by the pathological diagnosis of all 74 exfoliated cell samples (including 55 cases in model-building group and 19 cases in verification group). In our result, a cutoff value of C-score >6 showed 100% sensitivity and 100% specificity in the diagnosis of cervical cancer. Conclusion: In this study, we found that CNAs of cervical exfoliated cell samples could robustly distinguish invasive cervical cancer from cancer-free tissues. And we have also developed a C-score algorithm model to process the sequencing data in a more standardized and automated way.

      • Prognostic Value of β-catenin Expression in Breast Cancer Patients: a Meta-analysis

        Zhang, De-Pu,Li, Xiao-Wei,Lang, Jing-He Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.14

        Background: ${\beta}$-catenin plays a crucial role in the progression of breast cancer (BC) and a prognostic role of in BC patients has been widely reported. However, controversy still remains. Materials and Methods: Identical search strategies were used to search relevant literature in electronic databases updated to July 1, 2014. Individual hazard ratios (HRs) and 95% confidence intervals (CIs) were extracted and pooled HRs with 95%CIs were used to evaluate the strength of association between positive ${\beta}$-catenin expression in different subcellular locations and survival results of BC patients. Subgroup and meta-regression analyses were performed to explore heterogeneity. Funnel plots of Begg's and Egger's linear regression test were used to investigate publication bias. Heterogeneity and sensitivity were also assessed. All the work was completed using STATA. Results: A total of 2,204 patients from 12 evaluative studies were finally included. Pooled HRs and 95%CIs suggested that ${\beta}$-catenin expression in cytoplasm/nucleus had an unfavorable impact on both overall survival (OS) (HR: 1.93, 95%CI: 1.40-2.65) and disease free survival (DFS)/ recurrent free survival (RFS) (HR: 1.60, 95%CI: 1.20-2.13) in BC patients. However, here was no significant association between ${\beta}$-catenin expression in the membranes with OS (HR: 0.65, 95%CI: 0.42-1.02) or DFS/RFS (HR: 0.66, 95%CI: 0.38-1.13). Publication bias was absent in all of the four outcomes. Sensitivity analysis revealed that the results of this meta-analysis were robust. Conclusions: Positive ${\beta}$-catenin expression in cytoplasm/nucleus rather than in membrane is a significant prognostic factor in patients with BC who have been surgically treated.

      • KCI등재

        Design of potent, non-toxic anticancer peptides based on the structure of the antimicrobial peptide, temporin-1CEa

        Qing-Zhu Yang,Che Wang,Lei Lang,Yang Zhou,He Wang,De-Jing Shang 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.11

        Recent advances in the search for novel anticanceragents have indicated that the positively chargedantimicrobial peptides have emerged as promising agentsoffering several advantages over the conventional anticancerdrugs. As a naturally occurring, cationic, a-helicalantimicrobial peptide, temproin-1CEa has been proved toexhibit a potent anticancer effect and a moderate hemolyticactivity. In order to reduce the hemolytic activity of temporin-1CEa and improve its anticancer potency towards arange of human breast cancer cells, in the present study, sixanalogs of temporin-1CEa were rationally designed andsynthesized. The amphipathicity levels and a-helicalstructural patterns of peptides were reserved, while theircationic property and hydrophobicity were changed. Theresults of MTT and hemolysis assay indicated that theanalog peptides displayed an improved anticancer activityand showed an overall optimized therapeutic index. Thehydrophobicity of peptides was positively correlated withtheir hemolytic and antitumor activities. Moreover, the datasuggest a strategy of increasing the cationicity whilemaintaining the moderate hydrophobicity of naturallyoccurring amphipathic a-helical peptides to generate analogswith improved cytotoxicity against tumor cells butdecreased activity against non-neoplastic cells such ashuman erythrocytes. This work highlights the potential forrational design and synthesis of improved antimicrobialpeptides that have the capability to be used therapeuticallyfor treatment of cancers.

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