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      • KCI등재

        A Modified Laminotomy for Interlaminar Endoscopic Lumbar Discectomy: Technical Report and Preliminary Results

        Zhiyun Feng,Yuxu Wu,Honghao Wu,Tae Gyong Jon,Ying Yuan,Zhong Chen,Yue Wang 대한척추신경외과학회 2023 Neurospine Vol.20 No.4

        Objective: To introduce a technique of laminotomy using a common trephine to enlarge the interlaminar space at L4/5 segment for interlaminar endoscopic lumbar discectomy (IELD) and report the anatomical basis of this procedure, technical details, as well as primary clinical outcomes of a consecutive patient cohort with L4/5 lumbar disc herniation (LDH). Methods: On anteroposterior fluoroscopy, the intersection of the medial edge of the inferior articular process and the inferior endplate of L4 vertebra was taken as the target. Using a common trephine, laminotomy was performed to remove a big portion of the posterior wall of the canal under the guidance of endoscopy. From June 2018 to December 2021, the consecutive patients who underwent L4/5 IELD were prospectively studied. Clinical outcomes were assessed at the day before surgery, 1 day, 1 month, 3 months, 12 months after surgery, and the last follow-up. Numerical Rating Scale, Roland-Morris Disability Questionnaire (RMDQ), and MacNab criteria were used to evaluate back and leg pain, the quality of life, and clinical efficacy, respectively. Results: There were 64 men and 44 women, with an age of 50.3 ± 14.9 years. The operating time was 74.54 ± 17.42 minutes. The mean follow-up time was 32.7 ± 18.6 months (range, 12–64 months). The complications of IELD included numbness, neck pain, and recurrence. Both leg pain (6.2 ± 1.9 vs. 1.8 ± 0.8, p < 0.001) and back pain (3.1 ± 2.3 vs. 1.7 ± 0.9, p < 0.001) quickly improved after this procedure and maintained (1.1 ± 1.5, 1.1 ± 1.3) at final follow-up. Physical disability due to back pain, as assessed using RMDQ, was improved remarkably after surgery (15.0 ± 5.8 vs. 2.9 ± 4.1, p < 0.001). In addition, MacNab outcome grade was evaluated as good-to-excellent in 96 cases (88.9%). Conclusion: A convenient technique of laminotomy using a common trephine was proposed for the L4/5 IELD. It can efficiently enlarge the interlaminar entry to perform endoscopic discectomy. This procedure is particularly suitable for treating LDH with concomitant lumbar spinal stenosis and migrated herniated disc.

      • KCI등재

        Stigmast-4-en-6β-ol-3-one decreases viability and induces apoptosis and ferroptosis in liver cancer cells by reducing E2F1

        Zhiyun Zhang,Jian Wang,Weiping Wan,Zhengchao Shen,Aixue Zuo,Rong Chen,Qinyi Wu,Enli Cai,Feng Huang,Rongping Zhang,Xinan Shi 한국통합생물학회 2023 Animal cells and systems Vol.27 No.1

        Hepatocellular carcinoma (HCC) is a frequently occurring malignant gastrointestinal cancer. The 5-year survival rate of HCC is still below 8%, and thus, identifying more effective therapeutic methodsis needed. Here, we evaluated the effects of Stigmast-4-en-6β-ol-3-one (S463) on the viability andcolony formation of liver cancer cells. S463 treatment decreased the viability and inducedapoptosis and ferroptosis in liver cancer cells, and also increased cellular malondialdehyde(MDA) and lipid peroxidation levels. In S463 treated cells, the expression level of Bax wasincreased, and the expression level of GPX4 was reduced, and the cleavage of PARP wasimproved. We also found that S463 treatment downregulated E2F1 and upregulated p53 atboth the mRNA and protein levels. Importantly, rescue experiments revealed thatoverexpression of E2F1 partially restored S463-induced Bax and p53 upregulation and GPX4downregulation and counteracted the S463-induced decrease in cell viability and colonyformation and the S463-induced increase in MDA and lipid peroxidation levels. Our findingssuggest that S463 significantly inhibits viability and colony formation and induces apoptosisand ferroptosis in liver cancer cells via E2F1.

      • KCI등재

        Molecular cloning, characterization and expression analysis of bolting-associated genes in flowering Chinese cabbage

        Xufeng Xiao,Caijun Wu,Zhiyun Xu,Yingui Yang,Shuying Fan,Heng Wang 한국유전학회 2015 Genes & Genomics Vol.37 No.4

        Bolting and flowering enhance the commercial value of flowering Chinese cabbage. FLOWERING LOCUS C (FLC) and FRIGIDA (FRI) are two key flowering time genes in Arabidopsis thaliana. Here we reported on the cloning and characterization of three ‘classical’ genes from the autonomous pathway from flowering Chinese cabbage, BrcuFCA, BrcuFLD and BrcuFVE. The results of expression analysis showed BrcuFLC was a gradually up-regulated with the developmental stages. However, temporal mRNA expression of BrcuFRI, BrcuFCA, BrcuFVE, and BrcuFLD were found to follow the opposite transcription patterns. The spatial expression patterns of BrcuFCA, BrcuFLD, and BrcuFVE were similar with the highest levels in flowers, whereas the highest transcription levels of BrcuFLC occurred in leaves and stems and that of BrcuFRI in roots. We presumed that the main pathway of bolting– flowering regulation in flowering Chinese cabbage might be the autonomous pathway and different from the vernalization pathway and FRI-dependent pathway.

      • KCI등재

        Prevalence of Plasmid-Mediated Quinolone Resistance Genes Among Escherichia coli in the Gut of Healthy People in Fuzhou, China

        Bin Ling,Yao Chen,Zhiyun Wu,Zhichang Zhao,Juan Wu,Yingping Cao 대한진단검사의학회 2018 Annals of Laboratory Medicine Vol.38 No.4

        The intestinal tract may be an important reservoir for antibioticresistant genes [1]. Determining the prevalence of quinolone resistance in intestinal bacteria within the community is important for both healthy subjects and hospital patients as quinolone is one of the most commonly used antibiotics in China. The prevalence of plasmid-mediated quinolone resistance (PMQR) geneharboring Enterobacteriaceae in the gut flora among healthy humans was previously unknown, so we assessed the prevalence of PMQR genes among commensal Escherichia coli in healthy persons from one region in China. This study was approved by the Ethics Committee of the Fujian Medical University Union Hospital (No. 2012KY085). Written informed consent was obtained from all participants.

      • KCI등재

        Modeling and Virtual Screening of Antisense Peptides Targeting the Divergent Region of Tumor-Associated MT1-MMP Protein

        Bowen Tan,Yijie Zhou,Zhilei Song,Yinxuan Peng,Fang Wu,Yue Kang,Xiaomin Liu,Li Zeng,Tingting Huang,Zongying Liu,Lili Xiong,Zhiyun Guo,Jian Cui,Canquan Mao 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.9

        Membrane type-1 matrix metalloproteinase (MT1-MMP; also known as MMP14) is a key enzyme involved in tumor invasion and metastasis, and is a potential target for drug discovery for cancer therapy. However, till now there is no MT1-MMP- or MMP-based anticancer drugs in the market mainly because of the high conservation of the MMP family and also because there is no elucidated crystal structure for the mature MT1-MMP. The modeling of the three-dimensional structure of mature MT1-MMP and the finding of MT1-MMP targeted peptides by virtual screening are highly desired. In this study, the three-dimensional structure of mature MT1-MMP is constructed by homology and de novo modeling and later rationalized and optimized by molecular dynamics simulations. An antisense peptide library was constructed against the divergent sense peptide DEGTEEET in the specific region of MT1-MMP, which was found by multiple alignment of the whole MMP family. The antisense peptide library was virtually screened against the constructed three-dimensional model of MT1-MMP. The top 20 novel peptides were further studied, which were found well docked with MT1-MMP at the region of DEGTEEET, again confirming their specific binding to MT1-MMP. Preliminary study of one of the top-ranked peptide SFLLSPFV showed that it could inhibit the viabilities of MG63 and MDA-MB-231 tumor cells. We thus not only successfully modeled the three-dimensional structure of mature MT1-MMP but also provided a new way for the finding of peptide candidates targeting MT1-MMP based on antisense peptide library.

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