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Endocr Relat Cancer ; 26(1): 153-164, 2019 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-30139768


There is no effective treatment for patients with poorly differentiated papillary thyroid cancer or anaplastic thyroid cancer (ATC). Anlotinib, a multi-kinase inhibitor, has already shown antitumor effects in various types of carcinoma in a phase I clinical trial. In this study, we aimed to better understand the effect and efficacy of anlotinib against thyroid carcinoma cells in vitro and in vivo. We found that anlotinib inhibits the cell viability of papillary thyroid cancer and ATC cell lines, likely due to abnormal spindle assembly, G2/M arrest, and activation of TP53 upon anlotinib treatment. Moreover, anlotinib suppresses the migration of thyroid cancer cells in vitro and the growth of xenograft thyroid tumors in mice. Our data demonstrate that anlotinib has significant anticancer activity in thyroid cancer, and potentially offers an effective therapeutic strategy for patients of advanced thyroid cancer type.

J Gen Appl Microbiol ; 64(4): 198-201, 2018 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-29695662


A biosensor screening assay based on the synthesis of betaxanthin was applied to relatively high throughput screening of the L-tyrosine mutant library. In the assays, fluorescence output showed a linear relationship between extracellular L-tyrosine content and yellow pigment formation. In addition, the yellow pigment accumulation of the L-tyrosine high-yield strain can be easily distinguished with the naked eye compared with the wild-type strain. As a result, numerous mutants that exhibited significantly increased coloration, were screened out after random mutagenesis, and p-coumaric acid production in mutants NK-A3 and NK-B4, were remarkably improved by 4-fold more than that of the wild-type strain. In general, this study provides a novel strategy for screening mutant libraries in the search for highly L-tyrosine-producing strains.

Ensaios de Triagem em Larga Escala , Microbiologia Industrial/métodos , Saccharomyces cerevisiae/metabolismo , Tirosina/biossíntese , Técnicas Biossensoriais , Biblioteca Gênica , Mutagênese , Ácidos Picolínicos/metabolismo , Propionatos/metabolismo , Saccharomyces cerevisiae/genética , Tirosina/genética , Tirosina/metabolismo
BMC Microbiol ; 17(1): 198, 2017 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-28927379


BACKGROUND: Autoinducer-2 (AI-2) is a universal signal molecule and enables an individual bacteria to communicate with each other and ultimately control behaviors of the population. Harnessing the character of AI-2, two kinds of AI-2 "controller cells" ("consumer cells" and "supplier cells") were designed to "reprogram" the behaviors of entire population. RESULTS: For the consumer cells, genes associated with the uptake and processing of AI-2, which includes LsrACDB, LsrFG, LsrK, were overexpressed in varying combinations. Four consumer cell strains were constructed: Escherichia coli MG1655 pLsrACDB (NK-C1), MG1655 pLsrACDBK (NK-C2), MG1655 pLsrACDBFG (NK-C3) and MG1655 pLsrACDBFGK (NK-C4). The key enzymes responsible for production of AI-2, LuxS and Mtn, were also overexpressed, yielding strains MG1655 pLuxS (NK-SU1), and MG1655 pLuxS-Mtn (NK-SU2). All the consumer cells could decrease the environmental AI-2 concentration. NK-C2 and NK-C4 were most effective in AI-2 uptake and inhibited biofilm formation. While suppliers can increase the environmental AI-2 concentration and NK-SU2 was most effective in supplying AI-2 and facilitated biofilm formation. Further, reporter strain, MG1655 pLGFP was constructed. The expression of green fluorescent protein (GFP) in reporter cells was initiated and guided by AI-2. Mixture of consumer cells and reporter cells suggest that consumer cells can decrease the AI-2 concentration. And the supplier cells were co-cultured with reporter cells, indicating that supplier cells can provide more AI-2 compared to the control. CONCLUSIONS: The consumer cells and supplier cells could be used to regulate environmental AI-2 concentration and the biofilm formation. They can also modulate the AI-2 concentration when they were co-cultured with reporter cells. It can be envisioned that this system will become useful tools in synthetic biology and researching new antimicrobials.

Bactérias/metabolismo , Escherichia coli/fisiologia , Homosserina/análogos & derivados , Lactonas/metabolismo , Bactérias/crescimento & desenvolvimento , Proteínas de Bactérias/genética , Proteínas de Bactérias/metabolismo , Biofilmes/efeitos dos fármacos , Biofilmes/crescimento & desenvolvimento , Liases de Carbono-Enxofre/genética , Liases de Carbono-Enxofre/metabolismo , Escherichia coli/genética , Escherichia coli/crescimento & desenvolvimento , Proteínas de Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Regulação Bacteriana da Expressão Gênica , Genes Bacterianos , Homosserina/análise , Homosserina/genética , Homosserina/metabolismo , Lactonas/análise
Zhonghua Nan Ke Xue ; 22(4): 335-8, 2016 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-30088705


Objective: To explore the treatment of vesiculitis with hemospermia by transurethral seminal vesiculoscopy. Methods: We treated 64 cases of vesiculitis with hemospermia by transurethral seminal vesiculoscopy. During the operation,we removed the stones and inflammatory substances and collected seminal vesicle fluid to be cultured for bacteria,ureaplasma urealyticum(UU),chlamydia trachomatis(CT),and mycoplasma hominis(MH),followed by infusion of levofloxacin at 0. 3 g/100 ml into the seminal vesicle. Regular follow-up was conducted post-operatively. Results: All the operations were successfully accomplished, the operation time averaging(40 ± 15) min(25- 50 min). The ejaculatory duct opening was observed on the verumontanum surface in the posterior urethra in 2 cases, abnormal passages found in the prostatic utricle in 8 cases, and seminal vesicle fenestration from the prostatic utricle conducted in the other 54 cases(32 by seminal vesiculoscopy and 22 with holmium laser). Stones were seen in the prostatic utricle in 5 cases, in the seminal vesicle in 6 cases, and in both the prostatic utricle and seminal vesicle in 2 cases. Culture of the seminal vesicle fluid showed the acinetobacter to be positive in 1 case and UU, CT, and MH to be negative. At 3 months after surgery, hemospermia was cured in 52 cases, relieved in 8,and unimproved in 4. Conclusion: Seminal vesicle fenestration drainage by transurethral seminal vesiculoscopy for the treatment of vesiculitis with hemospermia has the advantages of short operation time, high effectiveness and no obvious complications and can also be employed for the examination of the seminal vesicle as well as removal of stones and inflammatory substances.

Doenças dos Genitais Masculinos/cirurgia , Hemospermia/cirurgia , Inflamação/cirurgia , Glândulas Seminais/cirurgia , Líquidos Corporais , Cálculos , Chlamydia trachomatis , Drenagem , Ductos Ejaculatórios , Humanos , Lasers de Estado Sólido , Levofloxacino , Masculino , Duração da Cirurgia , Período Pós-Operatório , Próstata , Uretra