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1.
Cancer Lett ; 519: 211-225, 2021 10 28.
Artigo em Inglês | MEDLINE | ID: mdl-34311033

RESUMO

The transient receptor potential canonical (TRPC) channels have been implicated in various types of malignancies including gastric cancer (GC). However, the detailed mechanisms of TRPC channels underlying cell proliferation and apoptosis of GC cells remain largely unknown. Here, we report that TRPC3 was highly expressed in clinical GC specimens and correlated with GC malignant progression and poor prognosis. Forced expression of TRPC3 in GC cells enhanced both receptor-operated Ca2+ entry (ROCE) and store-operated Ca2+ entry (SOCE) and promoted the nuclear factor of activated T cell 2 (NFATc2) nuclear translocation by AKT/GSK-3ß and CNB2 signaling. Pharmacological inhibition of TRPC3 or CRISPR/Cas9-mediated TRPC3 knockout effectively inhibited the growth of GC cells both in vitro and in vivo. These effects were reversible by the rescue of TRPC3 expression. Furthermore, we confirmed the role of TRPC3 and the ROCE-AKT/GSK3ß-CNB2/NFATc2 signaling cascade in regulating cell cycle checkpoint, apoptosis cascade, and intracellular ROS production in GC. Overall, our findings suggest an oncogenic role of TRPC3 in GC and may highlight a potential target of TRPC3 for therapeutic intervention of GC and its malignant progression.


Assuntos
Carcinogênese/metabolismo , Glicogênio Sintase Quinase 3 beta/metabolismo , Fatores de Transcrição NFATC/metabolismo , Transdução de Sinais/fisiologia , Neoplasias Gástricas/metabolismo , Canais de Cátion TRPC/metabolismo , Animais , Apoptose/fisiologia , Carcinogênese/patologia , Linhagem Celular Tumoral , Proliferação de Células/fisiologia , Humanos , Camundongos , Oncogenes/fisiologia , Transporte Proteico/fisiologia , Espécies Reativas de Oxigênio/metabolismo , Neoplasias Gástricas/patologia
2.
Nanomaterials (Basel) ; 10(10)2020 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-33036403

RESUMO

Wearable electronics, such as sensors, actuators, and supercapacitors, have attracted broad interest owing to their promising applications. Nevertheless, practical problems involving their sensitivity and stretchability remain as challenges. In this work, efforts were devoted to fabricating a highly stretchable and sensitive strain sensor based on dip-coating of graphene onto an electrospun thermoplastic polyurethane (TPU) nanofibrous membrane, followed by spinning of the TPU/graphene nanomembrane into an intertwined-coil configuration. Owing to the intertwined-coil configuration and the synergy of the two structures (nanoscale fiber gap and microscale twisting of the fiber gap), the conductive strain sensor showed a stretchability of 1100%. The self-inter-locking of the sensor prevents the coils from uncoiling. Thanks to the intertwined-coil configuration, most of the fibers were wrapped into the coils in the configuration, thus avoiding the falling off of graphene. This special configuration also endowed our strain sensor with an ability of recovery under a strain of 400%, which is higher than the stretching limit of knees and elbows in human motion. The strain sensor detected not only subtle movements (such as perceiving a pulse and identifying spoken words), but also large movements (such as recognizing the motion of fingers, wrists, knees, etc.), showing promising application potential to perform as flexible strain sensors.

3.
Medicine (Baltimore) ; 99(27): e21042, 2020 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-32629729

RESUMO

BACKGROUND: This systematic review protocol will appraise the effectiveness and safety of electrical stimulation (ES) for limb spasticity (LS) in children with stroke. METHODS: Cochrane Library, EMBASE, PUBMED, PsycINFO, Scopus, OpenGrey, CINAHL, ACMD, CNKI, and WANGFANG will be systematically retrieved for randomized controlled trials (RCTs) testing the effectiveness of ES compared with other interventions on LS in children with stroke. Two independent authors will evaluate eligibility using predefined criteria and will perform data extraction and study quality appraisal of eligible trials. Primary outcomes include gait velocity, and limb spasticity status. Limb function, quality of life, pain intensity, and adverse events will be assessed as secondary outcomes. We will perform data analysis using RevMan 5.3 software. RESULTS: This systematic review will summarize the most recent evidence to assess the effectiveness and safety of ES for LS in children with stroke. CONCLUSIONS: The results of this study may help to determine whether ES is effective or not for LS in children with stroke. STUDY REGISTRATION: INPLASY202050115.


Assuntos
Terapia por Estimulação Elétrica/métodos , Espasticidade Muscular/terapia , Acidente Vascular Cerebral/complicações , Criança , Terapia por Estimulação Elétrica/efeitos adversos , Humanos , Espasticidade Muscular/psicologia , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Segurança , Resultado do Tratamento , Velocidade de Caminhada/fisiologia
4.
Nat Prod Res ; 34(22): 3189-3198, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30698037

RESUMO

Four new C-geranyl flavonoids, paulownione D-G (1-4) were isolated from the 50% acetone-H2O extract of the flowers of Paulownia fortunei. The structures of the compounds were determined by extensive spectroscopic analyses (UV, IR, HR-ESI-MS, 1D and 2D NMR). All of the compounds (1-4) exhibited potent protection effects in H9c2 cardiocytes against the lipopolysaccharide (LPS)-induced inflammation.


Assuntos
Anti-Inflamatórios não Esteroides/química , Anti-Inflamatórios não Esteroides/farmacologia , Flavonoides/química , Flavonoides/farmacologia , Lamiales/química , Animais , Linhagem Celular , Avaliação Pré-Clínica de Medicamentos , Flores/química , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Lipopolissacarídeos/toxicidade , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Miócitos Cardíacos/efeitos dos fármacos , Ratos
5.
Medicine (Baltimore) ; 98(37): e16814, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31517812

RESUMO

The purpose of this study was to compare outcomes of open reduction and internal fixation (ORIF) versus closed reduction (CR) for mandibular condylar fractures.Patients included in the National Inpatient Sample (NIS) database (2005-2014) who were admitted to the hospital for unilateral mandibular condylar fracture were included in the analysis. Patient characteristics and clinical outcomes were compared between those who received ORIF and those receiving CR. Logistic regression analysis was performed to estimate odds ratios (ORs) for each aspect of the main observed events.NIS data of 12,303 patients who underwent ORIF and 4310 patients who underwent CR were analyzed. Compared to CR, ORIF had an increased risk of longer hospital stay (adjusted OR [aOR] = 1.78, 95% confidence intervals [CIs] = 1.51-2.09), higher total medical cost (aOR = 2.57, 95% CI = 2.17-3.05), and hematoma development (aOR = 10.66, 95% CI = 1.43-75.59), but had a lower risk of having wound complications (aOR = 0.86, 95% CI = 0.79-0.93).Patients with mandibular condylar fractures who receive ORIF have greater risk of having an extended hospital stay, higher total medical costs, and hematoma development but lower risk of experiencing wound complications compared to those who receive CR.


Assuntos
Fixação Interna de Fraturas , Côndilo Mandibular/lesões , Côndilo Mandibular/cirurgia , Fraturas Mandibulares/cirurgia , Redução Aberta , Adulto , Comorbidade , Estudos Transversais , Feminino , Fixação Interna de Fraturas/economia , Custos de Cuidados de Saúde , Hematoma/epidemiologia , Hematoma/etiologia , Humanos , Pacientes Internados , Tempo de Internação/economia , Masculino , Fraturas Mandibulares/economia , Fraturas Mandibulares/epidemiologia , Redução Aberta/economia , Complicações Pós-Operatórias/epidemiologia , Fatores de Risco , Resultado do Tratamento
6.
Nanoscale Res Lett ; 14(1): 215, 2019 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-31240411

RESUMO

CuS nanoflowers were loaded on anatase TiO2/polyvinylidene fluoride (PVDF) fibers by hydrothermal treated electrospun tetrabutyl orthotitanate (TBOT)/PVDF fibers at low temperature. The results indicated that the amount of copper source and sulfur source determined the crystallization and morphology of the resultant products. It was found that the composite of CuS narrowed the band gap energy of TiO2 and enhanced the separation efficiency of the photogenerated electron-hole pairs of TiO2. The photocatalytic reaction rate of CuS/TiO2/PVDF fibers to rhodamine B was 3 times higher than that of TiO2/PVDF fibers under visible light irradiation. Besides, owing to the preparation process was carried out at low temperature, the flexibility of CuS/TiO2/PVDF fibers was ensured. In addition, the self-cleaning performance of the dye droplets on the resultant product surface was demonstrated under visible light. Meanwhile, the resultant product can automatically remove dust on the surface of the material under the rolling condition of droplets due to its hydrophobicity. Therefore, the as-prepared CuS/TiO2/PVDF fibers can not only degrade the contaminated compounds, but also depress the maintenance cost owing to its self-cleaning performance, which means a very practical application prospect.

7.
Nanomaterials (Basel) ; 9(3)2019 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-30875731

RESUMO

Novel flexible and recyclable core-shell heterostructured fibers based on cauliflower-like MoS2 and TiO2/PVDF fibers have been designed through one-step hydrothermal treatment based on electrospun tetrabutyl orthotitanate (TBOT)/PVDF fibers. The low hydrothermal temperature avoids the high temperature process and keeps the flexibility of the as-synthesized materials. The formation mechanism of the resultant product is discussed in detail. The composite of MoS2 not only expands the light harvesting window to include visible light, but also increases the separation efficiency of photo-generated electrons and holes. The as-prepared product has proven to possess excellent and stable photocatalytic activity in the degradation of Rhodamine B and levofloxacin hydrochloride under visible light irradiation. In addition, the TiO2/PVDF@MoS2 core-shell heterostructured fibers exhibit self-cleaning property to dye droplets under visible light irradiation. Meanwhile, due to its hydrophobicity, the resultant product can automatically remove dust on its surface under the rolling condition of droplets. Hence, the as-prepared product cannot only degrade the contaminated compounds on the surface of the material, but also reduce the maintenance cost of the material due to its self-cleaning performance. Therefore, the as-prepared product possesses potential applications in degradation of organic pollutants and water treatment, which makes it a prospective material in the field of environmental treatment.

8.
Rev Esp Enferm Dig ; 111(4): 308-313, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30896961

RESUMO

BACKGROUND AND AIMS: non-alcoholic fatty liver disease (NAFLD) is the most common type of chronic liver injury worldwide. Some studies have shown that thymosin beta4 (Tß4) is closely related to liver diseases. Nevertheless, only a few published studies have reported the relationship between Tß4 and NAFLD. The purpose of this study was to evaluate the levels of Tß4 in patients with NAFLD compared with controls and to validate their relationship in a larger cohort. PATIENTS AND METHODS: a total of 76 NAFLD patients and 130 healthy controls were included in the study. Serum levels of Tß4, IL-6 and adiponectin were determined by ELISA. Serum glucose, insulin and lipids, as well as liver function were measured. Multivariate statistical analyses were performed via logistic regression modelling to determine the predictors with a significant relevance to NAFLD. The association between serum Tß4 and study variables was tested using correlation coefficients calculations. RESULTS: serum Tß4 content was 3.20 ± 0.98 mg/l in NAFLD patients (n = 76) and 5.53 ± 1.24 mg/l in healthy controls (n = 130); the difference between the two groups was statistically significant (p = 0.000). Multivariate logistic regression analysis identified Tß4 (OR = 0.343, 95% CI 0.240-0.491, p < 0.001), LDL (OR = 1.019, 95% CI 1.007-1.030, p = 0.001), ALT (OR = 1.021, 95% CI 1.001-1.041, p = 0.040) and IL-6 (OR = 1.443, 95% CI 1.079-1.929, p = 0.013) as independent predictors of NAFLD diagnosis. Serum Tß4 levels had a significant negative correlation with total cholesterol, TG, AST, GGT and IL-6 (p < 0.05 for all) and the correlation coefficient values were -0.163, -0.253, -0.143, -0.245 and -0.155, respectively. Serum Tß4 levels were positively correlated with serum adiponectin levels, with a correlation coefficient value of 0.143. CONCLUSION: serum Tß4 may play a defensive role in the development of NAFLD. Further studies are needed to confirm the role of Tß4 in NAFLD.


Assuntos
Proteínas dos Microfilamentos/sangue , Hepatopatia Gordurosa não Alcoólica/sangue , Timosina/sangue , Adiponectina/sangue , Alanina Transaminase/sangue , Aspartato Aminotransferases/sangue , Glicemia/análise , Estudos de Casos e Controles , Feminino , Humanos , Insulina/sangue , Interleucina-6/sangue , Lipídeos/sangue , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , gama-Glutamiltransferase/sangue
9.
Anat Rec (Hoboken) ; 302(9): 1544-1551, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-30809951

RESUMO

Melatonin, a neurohormone secreted by the pineal gland, has a variety of biological functions, such as circadian rhythms regulation, anti-oxidative activity, immunomodulatory effects, and anittumor, etc. At present, its antitumor effect has attracted people's attention due to its extensive tissue distribution, good tissue compatibility, and low toxic and side effects. In the gastrointestinal tract, there is high level of melatonin and many studies showed melatonin has effects of anti-gastric cancer. In this experiment, human gastric cancer cell lines AGS and MGC803 were used to investigate the intracellular molecular mechanism of melatonin against gastric cancer. After AGS and MGC803 have been treated with melatonin, the changes of cell morphology and cellular structure were observed under electron microscope. Flow cytometer and apoptosis detection kits were used to analyze the effect of apoptosis on AGS and MGC803. The alterations of apoptosis-related proteins Caspase 9, Caspase 3, and upstream regulators AKT, MDM2 including expression, phosphorylation, and activation were detected to analyze the intracellular molecular mechanism of melatonin inhibiting gastric cancer. In AGS and MGC803 cells with melatonin exposure, cleaved Caspase 9 was upregulated and Caspase 3 was activated; moreover, MDM2 and AKT expression and phosphorylation were downregulated. Melatonin promoted apoptosis of AGS and MGC803 cells by the downregulation of AKT and MDM2. Anat Rec, 302:1544-1551, 2019. © 2019 American Association for Anatomy.


Assuntos
Antioxidantes/farmacologia , Apoptose , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Melatonina/farmacologia , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-mdm2/antagonistas & inibidores , Neoplasias Gástricas/patologia , Proliferação de Células , Regulação para Baixo , Humanos , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteínas Proto-Oncogênicas c-mdm2/metabolismo , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/metabolismo , Células Tumorais Cultivadas
10.
Nanomaterials (Basel) ; 8(10)2018 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-30332837

RESUMO

To meet the urgent need of society for advanced photocatalytic materials, novel visible light driven heterostructured composite was constructed based on graphitic carbon nitride (g-C3N4) and fibrous TiO2. The g-C3N4/TiO2 (CNT) composite was prepared through electrospinning technology and followed calcination process. The state of the g-C3N4 and fibrous TiO2 was tightly coupled. The photocatalytic performance was measured by degrading the Rhodamine B. Compared to commercial TiO2 (P25®) and electrospun TiO2 nanofibers, the photocatalytic performance of CNT composite was higher than them. The formation of CNT heterostructures and the enlarged specific surface area enhanced the photocatalytic performance, suppressing the recombination rate of photogenerated carriers while broadening the absorption range of light spectrum. Our studies have demonstrated that heterostructured CNT composite with an appropriate proportion can rational use of visible light and can significantly promote the photogenerated charges transferred at the contact interface between g-C3N4 and TiO2.

11.
Artigo em Inglês | MEDLINE | ID: mdl-30254685

RESUMO

There has been great interest in phytoestrogens, which are polyhydric compounds that are derived from plants and have a structure similar to that of the mammalian steroid hormone 17ß-estradiol. The present study examined the estrogenic effects of a new natural uridine derivative, lepidiumuridine A (LA), that was isolated from the seeds of Lepidium apetalum. The structure was clarified and determined via analysis of extensive spectroscopic data interpretation. The activity of LA was investigated by measuring the levels of estradiol (E2), luteinizing hormone (LH), follicle stimulating hormone (FSH), and the uterus growth in mice. The proliferation experiment of MCF-7 breast cancer cells was also conducted. Western blot, in-cell western, and antagonist assays with methyl piperidino-pyrazole (MPP) were used for exploring the mechanism of the effects of LA. The results showed that LA elevated the uterine coefficient, the levels of E2, and FSH significantly. In addition, LA significantly elevated ERα expression in the uterus and MCF-7 cells. MPP inhibited the proliferation of LA-stimulated MCF-7 cell and ERα expression in MCF-7 cells. Taken together, LA had an estrogen-like effect, which was mainly mediated by the estrogen receptor ERα.

12.
Oncol Rep ; 39(4): 1975-1983, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29484412

RESUMO

Globally, gastric cancer (GC) is one of the most common types of cancer and the third leading cause of cancer­related death. In China, gastric and liver cancers have the highest mortality rates. Melatonin, also known as N-acetyl­5-methoxytryptamine, is a hormone that is produced by the pineal gland in animals and regulates sleep and wakefulness. Melatonin has been shown to inhibit various carcinomas, including GC. There are many different hypotheses to explain the anticancer effects of melatonin, including stimulation of apoptosis, inhibition of cell growth, regulation of anticancer immunity, induction of free-radical scavenging, and the competitive inhibition of estrogen. However, the underlying mechanism by which these effects are elicited remains elusive. The aim of the present study was to investigate the effects of melatonin on human GC cells and determine the underlying molecular mechanism. We treated SGC-7901 GC cells with melatonin and analyzed the resulting protein changes using protein chip technology. Several proteins related to cell apoptosis and proliferation were identified and further tested in SGC-7901 GC cells. We found that melatonin induced cell cycle arrest and the downregulation of CDC25A, phospho-CDC25A (at Ser75), p21 (p21Cip1/p21Waf1) and phospho-p21 (at Thr145). Melatonin also induced upregulation of Bax, downregulation of Bcl-xL, an increase in cleaved caspase-9 level and activation of caspase-3, which confirmed the involvement of the mitochondria in melatonin­induced apoptosis. Upstream regulators of the above proteins, MDM2, phospho-MDM2 (at Ser166) and AKT, phospho-AKT (at Thr308) were all attenuated by melatonin, which led to an increase in p53. The present study demonstrated that the oncostatic effects of melatonin on SGC-7901 GC cells are mediated via the blockade of the AKT/MDM2 intracellular pathway.


Assuntos
Melatonina/administração & dosagem , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-mdm2/genética , Neoplasias Gástricas/tratamento farmacológico , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Proteínas de Neoplasias/genética , Transdução de Sinais , Neoplasias Gástricas/genética , Neoplasias Gástricas/patologia
13.
Int J Mol Med ; 41(1): 173-183, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29115378

RESUMO

Surgery-obtained synovium specimens (SSSs) can provide a source of synovial mesenchymal stem cells (SMSCs) for experimental studies. However, these specimens contain diverse tissues, including the intima and subintima; therefore, these SMSCs are not entirely derived from the intima and their cell source is heterogeneous. The present study isolated synovial fragments (SFs) from synovial fluid dilutions extracted from patients with temporomandibular joint (TMJ) osteoarthrosis. Unlike SSSs, SFs, which are membranous and translucent, consist of only several cell layers, indicating the presence of only the intima. In the present study, SF cells (SFCs) and SSS cells (SSSCs) exhibited a homogeneous, fibroblast­like, spindle­shaped morphology after passaging in vitro. Furthermore, both cell types exhibited similar proliferative and differentiation potentials in vitro. However, SFCs exhibited more uniform surface markers compared with SSSCs when analysed by flow cytometry. Taken together, these results indicated that SFs contained a greater amount of unmixed intima than SSSs, and that SFCs exhibited more homogeneous characteristics than SSSCs, thereby offering an improved source of SMSCs in the TMJ.


Assuntos
Diferenciação Celular/genética , Células-Tronco Mesenquimais/citologia , Líquido Sinovial/citologia , Articulação Temporomandibular/citologia , Adolescente , Adulto , Idoso , Contagem de Células , Feminino , Citometria de Fluxo , Humanos , Masculino , Transplante de Células-Tronco Mesenquimais , Pessoa de Meia-Idade , Osteoartrite/patologia , Osteoartrite/cirurgia , Membrana Sinovial/citologia , Transtornos da Articulação Temporomandibular/patologia , Transtornos da Articulação Temporomandibular/cirurgia
14.
Rev Esp Enferm Dig ; 110(1): 19-24, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29271227

RESUMO

OBJECTIVE: The aim of the study was to determine whether serum thymosin beta4 (Tß4) can be a useful noninvasive biomarker to differentiate between nonalcoholic steatohepatitis (NASH) and nonalcoholic fatty liver (NAFL). METHODS: The study included 24 NAFL patients and 21 NASH patients. The levels of Tß4, 8-hydroxydeoxyguanosine acid (8-OhdG), liver function parameters, blood lipid, and glucose were detected in the venous blood of all patients. The NAFLD histological activity score (NAS) was examined in biopsy specimens from all patients. Statistical analysis was performed in order to find differences between the two abovementioned groups. In addition, receiver operator characteristic (ROC) analyses for alanine aminotransferase (ALT) and Tß4 levels were performed in NAFL and NASH patients and the cut-off value was determined. Associations between the variables were tested using correlation coefficient calculations. Statistical significance was set at a p value of < 0.05. RESULTS: Serum Tß4 content was 5.12 ± 1.87 mg/l in the NAFL group and 2.98 ± 1.35 mg/l in the NASH group (p < 0.001). Serum Tß4 content and NAS, histological features of hepatic steatosis, lobular inflammation and ballooning, ALT, glucose and 8-OhdG levels were negatively correlated (p < 0.05 for all) in the NASH group. The correlation coefficient values were -0.530, -0.562, -0.574, -0.438, -0.446, -0.426 and -0.563, respectively. On the basis of ROC analysis, the best predictive Tß4 cut-off value for detecting NASH was 3.94 mg/l (85.7% sensitivity and 79.2% specificity, which were higher than those of ALT). CONCLUSION: Serum Tß4 level can be used as a biomarker for the diagnosis of NASH and was negatively correlated with the oxidation state of the liver.


Assuntos
Biomarcadores/sangue , Hepatopatia Gordurosa não Alcoólica/sangue , Timosina/sangue , 8-Hidroxi-2'-Desoxiguanosina , Adulto , Idoso , Aspartato Aminotransferases/sangue , Desoxiguanosina/análogos & derivados , Diagnóstico Diferencial , Feminino , Humanos , Fígado/patologia , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Hepatopatia Gordurosa não Alcoólica/patologia
15.
Chronic Dis Transl Med ; 3(3): 165-168, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29063072

RESUMO

As a result of increased prevalence of obesity worldwide, non-alcoholic fatty liver disease (NAFLD) has become one of the most common causes of chronic liver disease. Although most NAFLD cases remain benign, some progress to end-stage liver diseases such as cirrhosis and hepatocellular carcinoma. Therefore, treatment should be considered for NAFLD patients who are likely to progress to nonalcoholic steatohepatitis (NASH) or fibrosis. Thymosin beta 4 (Tß4), a G-actin sequestering peptide, regulates actin polymerization in mammalian cells. In addition, studies have reported anti-inflammatory, insulin-sensitizing, and anti-fibrotic effects of Tß4. However, no research has been done to investigate the effects of Tß4 on NAFLD. Based on the findings above mentioned, we hypothesize that Tß4 may represent an effective treatment for NAFLD.

16.
Nanoscale ; 9(12): 4154-4161, 2017 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-28282101

RESUMO

Nanofiber-based air filters and electrostatic precipitation have stimulated considerable interest because of their high-efficiency for PM2.5 capture. In this paper, we introduce a new method of in situ electrospinning (e-spinning) of nanostructures into a polluted enclosed space to efficiently clean the air. From the comparisons of different polymer precursors and different PM2.5 capture techniques, it can be seen that in situ e-spinning of chitosan aqueous solution into the air exhibits the best PM2.5 capture efficiency, which may be attributed to the stronger polarity of chitosan and the synergistic effect of the strong electrostatic adsorption and surface adhesion of the electrospun (e-spun) nanofibers. A removal rate as high as 3.7 µg m-3 s-1 was obtained using this technology with a high efficiency of more than 95% PM2.5 capture. The results obtained from a field test in a smoking room (∼5 × 6 × 3 m3) are still in great agreement with those obtained in an experimental box (∼25 × 30 × 35 cm3). More importantly, chitosan is non-toxic and biodegradable, and is harmless to human health when used as a precursor for in situ e-spinning for PM2.5 capture.

17.
Cell Mol Neurobiol ; 37(5): 879-887, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27631411

RESUMO

Mammalian target of rapamycin (mTOR) is a key regulator of metabolism, cell growth, and protein synthesis. Since decreased mTOR activity has been found to slow aging in many species, the aim of this study was to examine the activity of mTOR and its phosphorylated form in in vitro and in vivo models mimicking Alzheimer's disease (AD), and investigate the potential pathway of PGC-1ß in regulating mTOR expression. Primary neurons and N2a cells were treated with Aß25-35, while untreated cells served as controls. The expression of mTOR, p-mTOR (Ser2448), and PGC-1ß was determined with Western blotting and RT-PCR assay, and the translocation of mTOR was detected using confocal microscopy. Aß25-35 treatment stimulated the translocation of mTOR from cytoplasm to nucleus, and resulted in elevated expression of mTOR and p-mTOR (Ser2448) and reduced PGC-1ß expression. In addition, overexpression of PGC-1ß was found to decrease mTOR expression. The results of this study demonstrate that Aß increases the expression of mTOR and p-mTOR at the site of Ser2448, and the stimulation of Aß is likely to depend on sirtuin 1, PPARγ, and PGC-1ß pathway in regulating mTOR expression.


Assuntos
Neurônios/metabolismo , Coativadores de Receptor Nuclear/metabolismo , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo/metabolismo , Sirtuína 1/metabolismo , Serina-Treonina Quinases TOR/metabolismo , Acetilação , Peptídeos beta-Amiloides , Animais , Linhagem Celular , Núcleo Celular/efeitos dos fármacos , Núcleo Celular/metabolismo , Camundongos Transgênicos , Neuritos/efeitos dos fármacos , Neuritos/metabolismo , Fragmentos de Peptídeos , Fosforilação , Transporte Proteico/efeitos dos fármacos , Ratos
18.
Chronic Dis Transl Med ; 2(1): 34-41, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29063023

RESUMO

OBJECTIVE: To evaluate the maintenance effect of probiotics versus that of aminosalicylates on ulcerative colitis. METHODS: MEDLINE, EMBASE, the Cochrane Controlled Trials Register, and the Chinese Biomedical Database were searched in English or Chinese. Data extracted were selected with strict criteria. RESULTS: In six randomized controlled trials (RCTs), a total of 721 participants were enrolled and the maintenance effect of probiotics (n = 364) versus that of aminosalicylates (n = 357) on ulcerative colitis was investigated. No significant difference was observed between probiotics and aminosalicylate groups (relative risk (RR) = 1.08; 95% confidence interval (CI): 0.91-1.28; P = 0.40). Three RCTs compared the incidence of adverse events with probiotics versus those with aminosalicylates. No significant difference was observed in the incidence of adverse events between the two groups (RR = 1.20; 95% CI: 0.92-1.56; P = 0.17). CONCLUSIONS: Probiotics and aminosalicylates both showed a maintenance effect on ulcerative colitis. However, more well-designed RCTs are required.

19.
Yao Xue Xue Bao ; 51(12): 1881-4, 2016 12.
Artigo em Chinês | MEDLINE | ID: mdl-29908559

RESUMO

The chemical constituents of the seeds of Lepidium apetalum Willd. were investigated using chromatographic methods, including Diaion HP-20, Toyopearl HW-40, MCI Gel CHP-20, ODS, silica gel chromatography and semi-preparative-HPLC. Three compounds were isolated and their structures were elucidated by spectral data and physicochemical properties, which were identified as lepidiumamide A (1), cis-desulfoglucotropaeolin(2), trans-desulfoglucotropaeolin (3). Among those, compound 1 is a new phenylacetamide, compound 2 and 3 were isolated from this plant for the first time, and their configurations were also identified for the first time.


Assuntos
Acetamidas/isolamento & purificação , Lepidium/química , Sementes/química , Cromatografia Líquida de Alta Pressão , Estrutura Molecular
20.
PLoS One ; 10(12): e0144226, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26649753

RESUMO

Induced pluripotent stem cell-derived mesenchymal stem cells (iPSC-MSCs) serve as a promising source for cell-based therapies in regenerative medicine. However, optimal methods for transforming iPSCs into MSCs and the characteristics of iPSC-MSCs obtained from different methods remain poorly understood. In this study, we developed a one-step method for obtaining iPSC-MSCs (CD146+STRO-1+ MSCs) from human synovial fluid MSC-derived induced iPSCs (SFMSC-iPSCs). CD146-STRO-1-SFMSCs were reprogrammed into iPSCs by transduction with lentivirus-mediated Sox2, Oct-3/4, klf4, and c-Myc. SFMSC-iPSCs were maintained with mTeSR1 medium in Matrigel-coated culture plates. Single dissociated cells were obtained by digesting the SFMSC-iPSCs with trypsin. The dissociated cells were then plated into Matrigel-coated culture plate with alpha minimum essential medium supplemented with 10% fetal bovine serum, 1× Glutamax, and the ROCK inhibitor Y-27632. Cells were then passaged in standard cell culture plates with alpha minimum essential medium supplemented with 10% fetal bovine serum and 1× Glutamax. After passaging in vitro, the cells showed a homogenous spindle-shape similar to their ancestor cells (SFMSCs), but with more robust proliferative activity. Flow cytometric analysis revealed typical MSC surface markers, including expression of CD73, CD90, CD105, and CD44 and lack of CD45, CD34, CD11b, CD19, and HLA-DR. However, these cells were positive for CD146 and stro-1, which the ancestor cells were not. Moreover, the cells could also be induced to differentiate in osteogenic, chondrogenic, and adipogenic lineages in vitro. The differentiation potential was improved compared with the ancestor cells in vitro. The cells were not found to exhibit oncogenicity in vivo. Therefore, the method presented herein facilitated the generation of STRO-1+CD146+ MSCs from SFMSC-iPSCs exhibiting enhanced proliferation and differentiation potential.


Assuntos
Antígenos CD/metabolismo , Diferenciação Celular , Células-Tronco Pluripotentes Induzidas/citologia , Células-Tronco Mesenquimais/citologia , Líquido Sinovial/citologia , Adipogenia , Técnicas de Cultura de Células , Condrogênese , Citometria de Fluxo , Humanos , Fator 4 Semelhante a Kruppel , Osteogênese
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