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1.
Cancer Lett ; 2020 Mar 03.
Artigo em Inglês | MEDLINE | ID: mdl-32142917

RESUMO

Endometrial cancer, a type of primary epithelial malignant tumor in the endometrium, is one of the three most common malignant tumors of the female reproductive system. While the incidence of endometrial cancer has been recently rising, its etiology remains unclear. In this study we found that EM2D9, an independently developed monoclonal antibody, specifically recognized endometrial cancer cells; we further determined that EM2D9 target protein was α5ß1. In vitro and in vivo experiments showed that EM2D9 inhibited the migration of endometrial cancer cells. Real-time quantitative PCR results showed that the expression of CD151 mRNA in endometrial carcinoma cells significantly decreased after EM2D9 treatment. We also found that EM2D9 affected the FAK signaling pathway. Collectively, these results shed light on a new mechanism for the development of endometrial carcinoma.

2.
J Phys Chem Lett ; 11(4): 1364-1369, 2020 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-32000486

RESUMO

A method using machine learning (ML) is proposed to describe metal growth for simulations, which retains the accuracy of ab initio density functional theory (DFT) and results in a thousands-fold reduction in the computational time. This method is based on atomic energy decomposition from DFT calculations. Compared with other ML methods, our energy decomposition approach can yield much more information with the same DFT calculations. This approach is employed for the amorphous sodium system, where only 1000 DFT molecular dynamics images are enough for training an accurate model. The DFT and neural network potential (NNP) are compared for the dynamics to show that similar structural properties are generated. Finally, metal growth experiments from liquid to solid in a small and larger system are carried out to demonstrate the ability of using NNP to simulate the real growth process.

3.
Cancer Med ; 8(4): 1806-1816, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30907072

RESUMO

Bladder cancer (BC) is a complex disease and could be classified into nonmuscle-invasive BC (NMIBC) or muscle-invasive BC (MIBC) subtypes according to the distinct genetic background and clinical prognosis. Until now, the golden standard and confirmed diagnosis of BC is cystoscopy and the major problems of BC are the high rate of recurrence and high costs in the clinic. Recent molecular and genetic studies have provided perspectives on the novel biomarkers and potential therapeutic targets of BC. In this article, we provided an overview of the traditional diagnostic approaches of BC, and introduced some new imaging, endoscopic, and immunological diagnostic technology in the accurate diagnosis of BC. Meanwhile, the minimally invasive precision treatment technique, immunotherapy, chemotherapy, gene therapy, and targeted therapy of BC were also included. Here, we will overview the diagnosis and therapy methods of BC used in clinical practice, focusing on their specificity, efficiency, and safety. On the basis of the discussion of the benefits of precision medicine in BC, we will also discuss the challenges and limitations facing the non-invasive methods of diagnosis and precision therapy of BC. The molecularly targeted and immunotherapeutic approaches, and gene therapy methods to BC treatment improved the prognosis and overall survival of BC patients.

4.
Infect Dis Poverty ; 7(1): 104, 2018 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-30384860

RESUMO

BACKGROUND: Echinococcosis is a parasitic zoonosis caused by Echinococcus larvae parasitism causing high mortality. The Tibetan Region of Sichuan Province is a high prevalence area for echinococcosis in China. Understanding the geographic distribution pattern is necessary for precise control and prevention. In this study, a spatial analysis was conducted to explore the town-level epidemiology of echinococcosis in the Sichuan Tibetan Region and to provide guidance for formulating regional prevention and control strategies. METHODS: The study was based on reported echinococcosis cases by the end of 2017, and each case was geo-coded at the town level. Spatial empirical Bayes smoothing and global spatial autocorrelation were used to detect the spatial distribution pattern. Spatial scan statistics were applied to examine local clusters. RESULTS: The spatial distribution of echinococcosis in the Sichuan Tibetan Region was mapped at the town level in terms of the crude prevalence rate, excess hazard and spatial smoothed prevalence rate. The spatial distribution of echinococcosis was non-random and clustered with the significant global spatial autocorrelation (I = 0.7301, P = 0.001). Additionally, five significant spatial clusters were detected through the spatial scan statistic. CONCLUSIONS: There was evidence for the existence of significant echinococcosis clusters in the Tibetan Region of Sichuan Province, China. The results of this study may assist local health departments with developing better prevention strategies and prompt more efficient public health interventions.


Assuntos
Equinococose/epidemiologia , Análise Espacial , Animais , Teorema de Bayes , China/epidemiologia , Echinococcus/isolamento & purificação , Geografia , Humanos , Saúde Pública , Tibet/epidemiologia , Zoonoses/epidemiologia , Zoonoses/parasitologia
5.
Front Physiol ; 8: 208, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28428760

RESUMO

To understand dynamic changes in polyamines (PAs) forms and components of polyamine metabolism in zoysiagrass (Zoysia japonica Steud.) response to salt stress with exogenous spermidine (Spd) application, two Chinese zoysia cultivars, z081 and z057, were exposed to sodium chloride stress for 2, 4, 6, and 8 days. The z057 cultivar possesses higher salinity tolerance than the z081 cultivar. Salt stress decreased the zoysiagrass fresh weight (FW) and increased free Spd and spermine (Spm) levels and soluble and insoluble putrescine (Put), Spd and Spm levels in both cultivars. Moreover, salt stress enhanced the activities of arginine decarboxylase (ADC), ornithine decarboxylase (ODC), S-adenosylmethionine decarboxylase (SAMDC), and diamine oxidase (DAO). Exogenous Spd increased PA metabolism and ADC, SAMDC, and DAO activities and decreased free Put levels under salt stress conditions in both cultivars. In addition, structural equation modeling (SEM) showed that ODC, SAMDC, and DAO contributed to PA metabolism, and endogenous Spd levels also contributed to endogenous Spm levels. Free PAs may be the primary factor influencing the variation of other PA forms. SEM also indicated that ADC and polyamine oxidase (PAO) play a limited role in enhancing zoysia salt tolerance via PA metabolism under salt stress.

6.
Front Plant Sci ; 7: 1221, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27582752

RESUMO

Salt stress, particularly short-term salt stress, is among the most serious abiotic factors limiting plant survival and growth in China. It has been established that exogenous spermidine (Spd) stimulates plant tolerance to salt stress. The present study utilized two zoysiagrass cultivars commonly grown in China that exhibit either sensitive (cv. Z081) or tolerant (cv. Z057) adaptation capacity to salt stress. The two cultivars were subjected to 200 mM salt stress and treated with different exogenous Spd concentrations for 8 days. Polyamine [diamine putrescine (Put), tetraamine spermine (Spm), and Spd], H2O2 and malondialdehyde (MDA) contents and polyamine metabolic (ADC, ODC, SAMDC, PAO, and DAO) and antioxidant (superoxide dismutase, catalase, and peroxidase) enzyme activities were measured. The results showed that salt stress induced increases in Spd and Spm contents and ornithine decarboxylase (ODC), S-adenosylmethionine decarboxylase (SAMDC), and diamine oxidase (DAO) activities in both cultivars. Exogenous Spd application did not alter polyamine contents via regulation of polyamine-degrading enzymes, and an increase in polyamine biosynthetic enzyme levels was observed during the experiment. Increasing the concentration of exogenous Spd resulted in a tendency of the Spd and Spm contents and ODC, SAMDC, DAO, and antioxidant enzyme activities to first increase and then decrease in both cultivars. H2O2 and MDA levels significantly decreased in both cultivars treated with Spd. Additionally, in both cultivars, positive correlations between polyamine biosynthetic enzymes (ADC, SAMDC), DAO, and antioxidant enzymes (SOD, POD, CAT), but negative correlations with H2O2 and MDA levels, and the Spd + Spm content were observed with an increase in the concentration of exogenous Spd.

7.
Zhongguo Zhen Jiu ; 33(11): 993-5, 2013 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-24494286

RESUMO

OBJECTIVE: To observe the difference in the efficacy on traumatic nerve injury among electroacupuncture, warm needling therapy and electroacupuncture plus warm needling therapy and explore the better therapeutic method. METHODS: The electromyography (EMG) and electroneurography (ENG) of 93 cases showed traumatic nerve injury of moderate damage. According to the single blind randomization principle, they were divided into an electroacupuncture (EA) group, a warm needling therapy (WN) group and an EA plus WN group, 31 cases in each one. The main acupoints were selected from Yangming Meridian and Shaoyang Meridian corresponding to the distribution of damaged nerves. EA, WN and EA plus WN were applied separately. The treatment was given once every day, 15 treatments made one session. After 3 sessions of treatment (45 treatments in total), EMG and ENG were re-checked and the results were analyzed statistically. RESULTS: Regarding the total effective rate and effective rate, it was 96. 8% (30/31) in the EA plus WN group, which was better than 74.2% (23/31) in the EA group and 77. 4% (24/31) in the WN group (P<0. 05). Concerning to the improvements of EMG, the result in the EA plus WN group was 96.8% (30/31), which was better than the other two groups [74. 2%(23/31),74. 2%(23/31)] (P<0. 05). In terms of the recovery of nerve conduction and amplitude, the results in EA plus WN group [(50.9+/-4. 6)m/s,(8. 8+/-2. 9),microVx1 000] were better than the other two groups [(43.7+/-3.1)m/s,(4. 2+/-1. 9)microV X 1 000,(43. 8+/-3. 3)m/s,(4. 5+/-2. 2)microV X 1 000] (P<0. 05). CONCLUSION: EA combined with WN is a better therapy of acupuncture and moxibustion in the treatment of traumatic nerve injury.


Assuntos
Terapia por Acupuntura , Traumatismos dos Nervos Periféricos/terapia , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento , Adulto Jovem
8.
J Agric Food Chem ; 58(15): 8490-4, 2010 Aug 11.
Artigo em Inglês | MEDLINE | ID: mdl-20614904

RESUMO

As more and more genetically modified organisms (GMO) are commercialized, efficient and inexpensive assays are required for their quick detection. An event-specific detection strategy based on the unique and specific sequences of integration junctions is useful because of its high specificity. This study developed a system for detecting six GM maize lines (Bt11, Bt176, GA21, MON810, NK603, and T25) using optical silicon thin-film biosensor chips. Aldehyde-labeled probes were arrayed and covalently attached to a hydrazine-derivatized chip surface. Biotinylated PCR amplicons were then hybridized with the probes. After washing and brief incubation with an anti-biotin IgG horseradish peroxidase conjugate and a precipitable horseradish peroxidase substrate, biotinylated PCR amplicons perfectly matched with the probes can be visualized by the color change on the chip surface (gold to blue/purple). This assay is extremely robust, exhibits high sensitivity and specificity, and is flexible from low through moderate to high throughput.


Assuntos
Técnicas Biossensoriais/métodos , Plantas Geneticamente Modificadas/genética , Zea mays/genética , Técnicas Biossensoriais/instrumentação
9.
J Genet Genomics ; 37(5): 341-6, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20513635

RESUMO

mRNA quantification is very important in molecular biological researches. Traditional spectrophotometric method cannot distinguish DNA, rRNA and tRNA species from mRNA. Northern blot can be used for mRNA quantification but is known to be time consuming. To rapidly detect mRNA levels, we developed an optical thin-film biosensor chip based method, to quantify mRNA in samples. After total RNA was extracted, the mRNA with poly(A) tails was reverse transcribed with oligo(dT)(20) primers and dNTPs mixed with digoxigenin(DIG)-11-dUTP. The transcribed first strand cDNA was hybridized with oligo(dA)(20) nucleotide probes spotted on optical thin-film biosensor chips. Excess first strand cDNA, single-strand RNA, and mis-matched DNA/DNA hybrids were removed by washing. The perfect-matched DNA/DNA hybrid was detected with anti-DIG-AP (alkaline phosphatase) conjugate and then incubated with NBT/BCIP substrate for color development. The range of the color is from purplish red to blue, according to the cDNA mass deposited on chip surface. Detection of mRNA levels from Arabidopsis samples proved that this method is feasible for mRNA quantification, and has great potential for application in mRNA quantification in various organisms.


Assuntos
Arabidopsis/química , Técnicas Biossensoriais/métodos , Análise de Sequência com Séries de Oligonucleotídeos/métodos , RNA Mensageiro/análise , RNA de Plantas/análise , Arabidopsis/genética , RNA Mensageiro/genética , RNA de Plantas/genética
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