Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 77
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
PLoS One ; 15(6): e0233903, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32516316

RESUMO

OBJECTIVE: Transcranial direct-current stimulation (tDCS) is a noninvasive approach that can alter brain excitability. Several studies have shown the effectiveness of tDCS in improving language and movement function in stroke patients. However, the effect of tDCS on cognitive function after stroke remains uncertain. METHODS: We searched Medline, Embase, the Cochrane Central Register of Controlled Trials (CENTRAL), the China National Knowledge Infrastructure, the China Science and Technology Journal Database, and the Wanfang Data Knowledge Service Platform from inception to April 2, 2019. Two reviewers independently screened the studies, extracted the data, and evaluated the quality of the included studies using the Cochrane Collaboration Risk of Bias Tool. All statistical analyses were performed in RevMan 5.3, and the mean difference (MD) or standard mean difference (SMD) were used as the pooled statistics. RESULTS: Fifteen studies involving 820 participants were included. When compared with passive tDCS, anodal tDCS was associated with improved general cognitive performance as examined by the Minimum Mental State Examination or Montreal Cognitive Assessment (SMD = 1.31, 95% CI 0.91-1.71, P < 0.00001), attention performance (SMD = 0.66, 95% CI 0.11-1.20, P = 0.02). There was no significant difference in memory performance (SMD = 0.41, 95% CI -0.67-1.50, P = 0.46). CONCLUSIONS: tDCS is likely to be effective for patients with cognitive impairment after stroke. The evidence for different effects based on population characteristics and stimulation methods was limited, but a real effect cannot be ruled out. More high-quality research in this field is required to determine the potential benefits of tDCS in the treatment of cognitive deficits after stroke and to establish the optimal treatment program.

3.
Mol Cell Probes ; 51: 101534, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32081769

RESUMO

Osteosarcoma is a malignant tumor in bones that is common in children and adolescents. MicroRNAs (miRs) are small non-coding RNAs that are associated with various kinds of tumors. miR-21 is one of the most frequently overexpressed microRNAs in osteosarcoma. Curcumin is a naturally occurring phenolic compound that has antitumor properties. Curcumin significantly inhibits osteosarcoma. However, the role of miR-21 and its target gene, reversion-inducing cysteine-rich protein with kazal motifs (RECK), in the anticancer activity of curcumin against osteosarcoma remains unclear. The aim of this study is to investigate the effect(s) of curcumin on osteosarcoma cell proliferation and elucidate its molecular mechanism. Cell counting kit-8, colony formation and flow cytometry assays were performed to study cell proliferation and apoptosis. Real time-polymerase chain reaction was used to determine the expression of miR-21 and RECK. Wnt/ß-catenin signaling pathway proteins were detected by Western Blot. We hereby show that curcumin upregulated the expression of RECK via miR-21, thereby subsequently regulating Wnt/ß-catenin signaling leading to the inhibition of osteosarcoma.

4.
Sci Rep ; 9(1): 18719, 2019 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-31822697

RESUMO

Fuzhenghuayu (FZHY) is a compound extracted from natural plants. Its anti-fibrotic effect has been confirmed in experimental and clinical studies. However, precise effects and underlying mechanisms of FZHY in liver angiogenesis largely remain understood. In this study, we investigated the effects of FZHY on sinusoidal capillarization and angiogenesis with mice challenged for Carbon tetrachloride (CCl4) and dimethylnitrosamine (DMN), in vitro human hepatic sinusoidal endothelial cells (HHSEC) and Human Umbilical Vein Endothelial Cell (HUVEC) 3D fibrin gel model. Besides its anti-fibrotic effect, FZHY ameliorated CCl4 and DMN-induced sinusoidal capillarization, angiogenesis and expression of angiogenesis-associated factors, i.e. CD31, VEGF, VEGF receptor II, phosphor-ERK and HIF-1α. Consistent with the findings based on animal models, inhibitory effects of FZHY on capillarization and angiogenesis were further confirmed in HHSEC and the HUVEC 3D fibrin gel model, respectively. These data suggest that FZHY ameliorates not only liver fibrosis but also vessel remodeling in experimental models. Therefore, FZHY might be a potentially useful drug to treat liver cirrhosis in clinical practice.

5.
J Genet ; 982019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31544781

RESUMO

Presummer, summer, and autumn bolls (PSB, SB and AB, respectively) in cotton are related to both maturity and yield. Therefore, studying their genetic basis is important for breeding purposes. In this study, we developed an association analysis panel consisting of 169 upland cotton accessions. The panel was phenotyped for PSB, SB and AB across four environments and genotyped using a Cotton SNP80K array. Single-nucleotide polymorphisms (SNPs) associated with these three traits were identified by a genomewide association study. A total of 53,848 high-quality SNPs were screened, and 91 significant trait-associated SNPs were detected. Of the 91 SNPs 33 were associated with PSB, 21 with SB and 37 with AB. Three SNPs for PSB (TM10410, TM13158 and TM21762) and five for AB (TM13730, TM13733, TM13834, TM29666 and TM43214) were repeatedly detected in two environments or by two methods. These eight SNPs exhibited high phenotypic variation of more than 10%, thus allowing their use formarker-assisted selection. The candidate genes for target traits were also identified. These findings provide a theoretical basis for the improvement of early maturity and yield in cotton breeding programmes.


Assuntos
Gossypium/genética , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas/genética , Alelos , Fibra de Algodão , Ontologia Genética , Estudo de Associação Genômica Ampla/métodos , Genótipo , Desequilíbrio de Ligação , Fenótipo , Estações do Ano
6.
Commun Biol ; 2: 274, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31372513

RESUMO

Natural polysaccharides have received much attention for their ability to ameliorate hepatic steatosis induced by high-fat diet. However, the potential risks of their use have been less investigated. Here, we show that the exopolysaccharides (EPS) from Lactobacillus rhamnosus GG (LGG) and L. casei BL23 reduce hepatic steatosis in zebrafish fed a high-fat diet, while BL23 EPS, but not LGG EPS, induce liver inflammation and injury. This is due to the fact that BL23 EPS induces gut microbial dysbiosis, while LGG EPS promotes microbial homeostasis. We find that LGG EPS, but not BL23 EPS, can directly activate intestinal HIF1α, and increased HIF1α boosts local antimicrobial peptide expression to facilitate microbial homeostasis, explaining the distinct compositions of LGG EPS- and BL23 EPS-associated microbiota. Finally, we find that liver injury risk is not confined to Lactobacillus-derived EPS but extends to other types of commonly used natural polysaccharides, depending on their HIF1α activation efficiency.


Assuntos
Peptídeos Catiônicos Antimicrobianos/metabolismo , Fígado Gorduroso/etiologia , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Polissacarídeos/administração & dosagem , Prebióticos/administração & dosagem , Animais , Peptídeos Catiônicos Antimicrobianos/biossíntese , Dieta Hiperlipídica , Microbioma Gastrointestinal , Lactobacillus , Larva , Peixe-Zebra/crescimento & desenvolvimento
7.
Int J Clin Pract ; 73(10): e13394, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31332896

RESUMO

BACKGROUND: Intra-operative hypotension might induce poor postoperative outcomes in non-cardiac surgery, and the relationship between the level or duration of Intra-operative hypotension (IOH) and postoperative adverse events is still unclear. In this study, we performed a meta-analysis to determine how IOH could affect acute kidney injury (AKI), myocardial injury and mortality in non-cardiac surgery. METHODS: We searched PubMed (Medline), Embase, Springer, The Cochrane Library, Ovid and Google Scholar, and retrieved the related clinical trials on intra-operative hypotension and prognosis in non-cardiac surgery. RESULTS: Fifteen observational studies were included. The meta-analysis showed that in non-cardiac surgery, intra-operative hypotension (mean arterial pressure [MAP]) <60 mm Hg for more than 1 minute was associated with an increased risk of postoperative acute kidney injury(AKI) [1-5 minutes: odds ratio (OR) = 1.13, 95% CI (1.04, 1.23), I2  = 0, P = .003; 5-10 minutes: OR = 1.18, 95% CI (1.07, 1.31), I2  = 0, P = .001; >10 minutes: OR = 1.35, 95% CI (1.1, 1.67), I2  = 52.6%, P = .004] and myocardial injury [1-5 minutes: OR = 1.16, 95% CI (1.01, 1.33), I2  = 30.6%, P = .04; 5-10 minutes: OR = 1.34, 95% CI (1.01, 1.77), I2  = 70.4%, P = .046; >10 minutes: OR = 1.43, 95% CI (1.18, 1.72), I2  = 39.4%, P < .0001]. Intra-operative hypotension (MAP < 60 mm Hg) for 1-5 minutes was not associated with postoperative 30-day mortality [OR = 1.15, 95% CI (0.95, 1.4), I2  = 0, P = .154], but intra-operative hypotension (MAP < 60 mm Hg) for more than 5 min was associated with an increased risk of postoperative 30-day mortality [OR = 1.11, 95% CI (1.06, 1.17), I2  = 51.9%, P < .0001]. CONCLUSION: Intra-operative hypotension was associated with an increased risk of postoperative AKI, myocardial injury and 30-day mortality in non-cardiac surgery. Intra-operative MAP < 60 mm Hg more than 1 minute should be avoided.


Assuntos
Lesão Renal Aguda/mortalidade , Hipotensão/mortalidade , Complicações Intraoperatórias , Infarto do Miocárdio/mortalidade , Lesão Renal Aguda/complicações , Humanos , Hipotensão/complicações , Infarto do Miocárdio/complicações
8.
Anaesthesiol Intensive Ther ; 51(2): 147-158, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31268276

RESUMO

Haemodynamic monitoring is the cornerstone in the optimization of tissue perfusion and the prevention of deteriorating metabolism. Haemodynamic alterations could be summarized in terms of cardiac dysfunction, changes of loading conditions (preload or/and afterload), and patient related issues. This review aims to present the clinical applications of different haemodynamic monitoring techniques, discuss advantages and disadvantages, and provide guidance to help the clinician select those techniques suitable to optimize haemodynamics in individual patients during the perioperative period.


Assuntos
Monitorização Hemodinâmica/métodos , Hemodinâmica/fisiologia , Assistência Perioperatória/métodos , Humanos
9.
Front Pharmacol ; 10: 447, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31156425

RESUMO

All-trans retinoic acid (ATRA) is an effective agent that induces differentiation, inhibits cell proliferation, and acts as an anticancer agent. ATRA was successfully conjugated with Pluronic F127 via esterification to enhance its anticancer effects. Pluronic-ATRA showed high cytotoxicity and inhibitory concentrations (IC50) 50% lower than those of ATRA in various breast cancer cell lines (4T1:31.16-8.57 µg/mL; EMT6: 50.48-7.08 µg/mL; MDA-MB-231:37.58-8.99 µg/mL; BT474:25.27-9.09 µg/mL). In combination with chemotherapy, Pluronic-ATRA synergistically enhanced the cytotoxic effects of cisplatin (CDDP). Pluronic-ATRA combined with CDDP effectively suppressed breast tumor growth in vivo. The results of this study demonstrate the potential of Pluronic-ATRA as an anticancer agent that can be used in combination therapy against solid tumors.

10.
Sci Rep ; 9(1): 6029, 2019 04 15.
Artigo em Inglês | MEDLINE | ID: mdl-30988338

RESUMO

It has been well established that the cerebellum and its associated circuitry constitute the essential neuronal system for both delay and trace classical eyeblink conditioning (DEC and TEC). However, whether the cerebellum is sufficient to independently modulate the DEC, and TEC with a shorter trace interval remained controversial. Here, we used direct optogenetic stimulation of mossy fibers in the middle cerebellar peduncle (MCP) as a conditioned stimulus (CS) replacement for the peripheral CS (eg, a tone CS or a light CS) paired with a periorbital shock unconditioned stimulus (US) to examine the ability of the cerebellum to learn the DEC and the TEC with various trace intervals. Moreover, neural inputs to the pontine nucleus (PN) were pharmacological blocked to limit the associative motor learning inside the cerebellum. We show that all rats quickly acquired the DEC, indicating that direct optogenetic stimulation of mossy fibers in the left MCP is a very effective and sufficient CS to establish DEC and to limit the motor learning process inside the cerebellum. However, only five out of seven rats acquired the TEC with a 150-ms trace interval, three out of nine rats acquired the TEC with a 350-ms trace interval, and none of the rats acquired the TEC with a 500-ms trace interval. Moreover, pharmacological blocking glutamatergic and GABAergic inputs to the PN from the extra-cerebellar and cerebellar regions has no significant effect on the DEC and TEC learning with the optogenetic CS. These results indicate that the cerebellum has the ability to independently support both the simple DEC, and the TEC with a trace interval of 150 or 350 ms, but not the TEC with a trace interval of 500 ms. The present results are of great importance in our understanding of the mechanisms and ability of the cerebellum in associative motor learning and memory.

11.
World J Surg Oncol ; 17(1): 7, 2019 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-30611274

RESUMO

BACKGROUND: Perioperative transfusion can reduce the survival rate in colorectal cancer patients. The effects of transfusion on the short- and long-term prognoses are becoming intriguing. OBJECTIVE: This systematic review and meta-analysis aimed to define the effects of perioperative transfusion on the short- and long-term prognoses of colorectal cancer surgery. RESULTS: Thirty-six clinical observational studies, with a total of 174,036 patients, were included. Perioperative transfusion decreased overall survival (OS) (hazard ratio (HR), 0.33; 95% confidence interval (CI), 0.24 to 0.41; P < 0.0001) and cancer-specific survival (CSS) (HR, 0.34; 95% CI, 0.21 to 0.47; P < 0.0001), but had no effect on disease-free survival (DFS) (HR, 0.17; 95% CI, - 0.12 to 0.47; P = 0.248). Transfusion could increase postoperative infectious complications (RR, 1.89, 95% CI, 1.56 to 2.28; P < 0.0001), pulmonary complications (RR, 2.01; 95% CI, 1.54 to 2.63; P < 0.0001), cardiac complications (RR, 2.20; 95% CI, 1.75 to 2.76; P < 0.0001), anastomotic complications (RR, 1.51; 95% CI, 1.29 to 1.79; P < 0.0001), reoperation(RR, 2.88; 95% CI, 2.05 to 4.05; P < 0.0001), and general complications (RR, 1.86; 95% CI, 1.66 to 2.07; P < 0.0001). CONCLUSION: Perioperative transfusion causes a dramatically negative effect on long-term prognosis and increases short-term complications after colorectal cancer surgery.


Assuntos
Transfusão de Sangue , Neoplasias Colorretais/cirurgia , Cirurgia Colorretal/efeitos adversos , Assistência Perioperatória , Complicações Pós-Operatórias , Humanos , Prognóstico
12.
Neural Regen Res ; 14(5): 896-902, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30688276

RESUMO

Tau protein, a microtubule-associated protein, has a high specific expression in neurons and axons. Because traumatic spinal cord injury mainly affects neurons and axons, we speculated that tau protein may be a promising biomarker to reflect the degree of spinal cord injury and prognosis of motor function. In this study, 160 female Sprague-Dawley rats were randomly divided into a sham group, and mild, moderate, and severe spinal cord injury groups. A laminectomy was performed at the T8 level to expose the spinal cord in all groups. A contusion lesion was made with the NYU-MASCIS impactor by dropping a 10 g rod from heights of 12.5 mm (mild), 25 mm (moderate) and 50 mm (severe) upon the exposed dorsal surface of the spinal cord. Tau protein levels were measured in serum and cerebrospinal fluid samples at 1, 6, 12, 24 hours, 3, 7, 14 and 28 days after operation. Locomotor function of all rats was assessed using the Basso, Beattie and Bresnahan locomotor rating scale. Tau protein concentration in the three spinal cord injury groups (both in serum and cerebrospinal fluid) rapidly increased and peaked at 12 hours after spinal cord injury. Statistically significant positive linear correlations were found between tau protein level and spinal cord injury severity in the three spinal cord injury groups, and between the tau protein level and Basso, Beattie, and Bresnahan locomotor rating scale scores. The tau protein level at 12 hours in the three spinal cord injury groups was negatively correlated with Basso, Beattie, and Bresnahan locomotor rating scale scores at 28 days (serum: r = -0.94; cerebrospinal fluid: r = -0.95). Our data suggest that tau protein levels in serum and cerebrospinal fluid might be a promising biomarker for predicting the severity and functional outcome of traumatic spinal cord injury.

13.
J Thorac Dis ; 10(3): 1635-1647, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29707316

RESUMO

Background: Casitas B-lineage lymphoma proto-oncogene-b (CBLB) influences the threshold of T cell activation and controlling peripheral T cell tolerance. In the present study, we hypothesize that potentially functional single nucleotide polymorphisms (SNPs) in CBLB are associated with clinical outcomes in patients advanced non-small cell lung cancer (NSCLC) treated with the first-line chemotherapy. Methods: We genotyped three SNPs (rs2305035, rs3772534 and rs9657904) at CBLB in 116 advanced NSCLC patients with progression free survival (PFS) data and 133 advanced NSCLC patients with overall survival (OS) data, and we assessed their associations, 95% confidence interval (CI), with clinical outcomes by using Cox proportional hazards regression analyses. In silico functional analysis was also performed for the SNPs under investigation. Results: We found that associations between the three SNPs and PFS/OS were not significant in the overall NSCLC patients. The rs2305035 AA genotype was associated with a worse PFS in female patients and those of non-smokers or light smokers (95% CI, 1.14-11.81, P=0.030; 95% CI, 1.42-10.24, P=0.008; and 95% CI, 1.39-9.93, P=0.009; respectively), compared with the GG+AA genotypes. We also found that the rs9657904 CC genotype was significantly associated with a worse OS than TT + TC genotypes in male advanced NSCLC patients. Further in silico functional analysis revealed that the rs965704 T allele was significantly associated with lower mRNA expression levels of the CBLB gene. Conclusions: Our findings identified two CBLB SNPs (rs2305035 and rs9657904) that were significantly associated with PFS and OS in several subgroups of Chinese advanced NSCLC patients after the first-line chemotherapy.

14.
Minerva Anestesiol ; 84(11): 1287-1297, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-29756694

RESUMO

INTRODUCTION: There is a high incidence of postoperative cardiopulmonary complications after thoracic surgery with one lung ventilation (OLV), the effect of general anesthetics on intraoperative cardiopulmonary function and postoperative complications is still unclear. EVIDENCE ACQUISITION: We searched the Embase, PubMed, Cochrane Library, Springer, Wiley, CNKI, VIP and Wanfang databases for randomized controlled trials (RCTs) in which inhalation anesthesia and intravenous anesthesia were compared; intraoperative cardiopulmonary function and postoperative complications were assessed in patients undergoing thoracic surgery with intraoperative one-lung ventilation (OLV). EVIDENCE SYNTHESIS: Twenty-three RCTs with a total of 1349 patients were included. Compared with intravenous anesthesia, inhalation anesthesia significantly increased pulmonary shunt fraction (Qs/Qt) (mean: 5.72, 95% CI: 3.93 to 7.51, P<0.0001), and improved Cardiac Index (CI) (mean difference [MD]: 0.19, 95% CI: 0.10 to 0.28, P<0.0001), but decreased Oxygenation Index (OI) during OLV intraoperatively (MD: -27.37, 95% CI: -43.92 to -10.82, P=0.001). Inhalation anesthesia could reduce postoperative pulmonary complications (RR: 0.47, 95% CI: 0.33 to 0.66, P<0.0001), but did not reduce postoperative cardiac adverse events (P>0.05). CONCLUSIONS: Inhalation anesthesia can preserve intraoperative cardiac function and reduce postoperative pulmonary complications in patients undergoing thoracic surgery with OLV; although it decreases intraoperative pulmonary function, inhalation anesthesia may be superior to intravenous anesthesia in thoracic surgery. Publication bias existed in some included studies, and the sample size was not large enough in CI and cardiac adverse events.


Assuntos
Anestesia por Inalação , Anestesia Intravenosa , Coração/fisiologia , Pulmão/fisiologia , Complicações Pós-Operatórias/epidemiologia , Procedimentos Cirúrgicos Torácicos , Testes de Função Cardíaca , Humanos , Monitorização Intraoperatória , Ventilação Monopulmonar , Ensaios Clínicos Controlados Aleatórios como Assunto , Testes de Função Respiratória
15.
Mol Med Rep ; 17(3): 4035-4042, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29286133

RESUMO

Osteoarthritis (OA) is a common degenerative joint disease. Inflammation may exaggerate the catabolism and degeneration in the pathogenesis of OA. Hydroxytyrosol (HT) has been used in the management of inflammatory diseases. In addition, reports have revealed that autophagy was a therapeutic target of diseases caused by inflammation. Sirtuin 6 (SIRT6) has also been demonstrated to prevent OA development by reducing both the inflammatory response and chondrocyte senescence. However, the roles of SIRT6 and autophagy in cartilage and its underlying anti­inflammatory mechanism are unknown. Therefore, the present study aimed to determine the effects of HT on autophagy and inflammation in chondrocytes, and clarify whether HT regulates the inflammatory response through SIRT6­mediated autophagy. The expression of protein and mRNA were determined by western blot analysis and reverse transcription­quantitative polymerase chain reaction. The production of cytokines was detected by ELISA. It was demonstrated that HT inhibited the levels of interleukin (IL)­1ß and IL­6 in tumor necrosis factor (TNF)­α­stimulated chondrocytes in a concentration­dependent manner. In addition, HT promoted cell autophagy and increased the mRNA and protein expression levels of SIRT6 in chondrocytes stimulated with TNF-α. Autophagy inhibitor 3-methyladenine or knockdown of SIRT6 decreased the inhibitory effects of HT on the inflammatory response in chondrocytes. In addition, knockdown of SIRT6 attenuated the expression of microtubule-associated protein 1A/1B­light chain 3 and Beclin1 in chondrocytes. Overall, these findings suggested that HT inhibits the inflammatory response of chondrocytes through SIRT6­mediated autophagy. The present study provided a new drug target for the clinical treatment of inflammatory diseases.


Assuntos
Anti-Inflamatórios/farmacologia , Autofagia/efeitos dos fármacos , Condrócitos/efeitos dos fármacos , Álcool Feniletílico/análogos & derivados , Sirtuínas/genética , Fator de Necrose Tumoral alfa/antagonistas & inibidores , Adenina/análogos & derivados , Adenina/farmacologia , Animais , Cartilagem Articular/efeitos dos fármacos , Cartilagem Articular/imunologia , Cartilagem Articular/patologia , Sobrevivência Celular/efeitos dos fármacos , Quimiocina CCL2/antagonistas & inibidores , Quimiocina CCL2/genética , Quimiocina CCL2/imunologia , Condrócitos/imunologia , Condrócitos/patologia , Regulação da Expressão Gênica , Interleucina-1beta/antagonistas & inibidores , Interleucina-1beta/genética , Interleucina-1beta/imunologia , Interleucina-6/antagonistas & inibidores , Interleucina-6/genética , Interleucina-6/imunologia , Masculino , Modelos Biológicos , Osteoartrite/genética , Osteoartrite/imunologia , Osteoartrite/patologia , Álcool Feniletílico/farmacologia , Cultura Primária de Células , Ratos , Ratos Sprague-Dawley , Transdução de Sinais , Sirtuínas/antagonistas & inibidores , Sirtuínas/imunologia , Fator de Necrose Tumoral alfa/farmacologia
16.
Exp Biol Med (Maywood) ; 242(9): 974-985, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28440736

RESUMO

Levistilide A (C24H28O4, molecular weight = 380.48) derived from Angelica sinensis (Danggui) has been reported to inhibit hepatic stellate cell proliferation. This study investigated the effects of levistilide A on liver fibrosis relating to angiogenesis, particularly on the characteristic change in liver sinusoidal endothelial cells. LX-2 cells were activated by TGF-ß1, and the human hepatic sinusoidal endothelial cells (HHSECs) were induced by endothelial cell growth supplement. Cell viability was detected using a methylthiazoldiphenyl-tetrazolium bromide assay; F-actin was visualized through the fluorescence probe method; cell proliferation was examined using the EdU kit; antiangiogenesis activity was assessed using the tube formation assay and transgenic zebrafish model. To verify the results in vivo, rats were subcutaneously injected with CCl4 twice a week for six weeks to duplicate the liver fibrosis model and then treated with 10 mL/kg of normal saline, 4 mg/kg of sorafenib, and 3 and 6 mg/kg of levistilide A for three weeks from the fourth week. Collagen deposition was detected through Sirius Red staining; liver microvasculature was examined through vWF labeling and X-ray 2D imaging; sinusoidal fenestrations were observed through scanning electron microscopy; collagen I, α-SMA, CD31, vascular endothelial growth factor (VEGF), and VEGF-R2 were detected through Western blotting. Our results indicated that levistilide A attenuated LX-2 cell activation and HHSEC proliferation. The ability of HHSECs to form tubelike structures in Matrigel was inhibited, and the number of functional vessels in transgenic zebrafish decreased. In in vivo experiments, levistilide A reduced collagen deposition and the number of new microvessels; ameliorated sinusoid capillarization; and downregulated the expression of CD31, VEGF, and VEGF-R2. These findings suggest that levistilide A can inhibit liver fibrosis through antiangiogenesis by alleviating sinusoid capillarization via the VEGF signaling pathway. Impact statement Levistilide A has been reported to inhibit hepatic stellate cell (HSC) proliferation. In this study, we further investigated the mechanisms of levistilide A on liver fibrosis relating to angiogenesis, particularly on the characteristic change in liver sinusoidal endothelial cells. The cell models of HSC and liver sinusoidal endothelial cell and CCl4 induced liver fibrosis model were used. These results suggest that levistilide A can inhibit liver fibrosis through antiangiogenesis by alleviating sinusoid capillarization via the vascular endothelial growth factor signaling pathway. The effect of levistilide A on liver fibrosis was confirmed, and its detailed mechanism was also discussed. These findings suggest that levistilide A may be a great potential drug for treating liver fibrosis through antiangiogenesis, and this effect will be verified in other fibrotic animal model studies or by clinical trials.


Assuntos
Fármacos Gastrointestinais/administração & dosagem , Compostos Heterocíclicos de Anel em Ponte/administração & dosagem , Cirrose Hepática/tratamento farmacológico , Cirrose Hepática/patologia , Neovascularização Patológica/patologia , Animais , Modelos Animais de Doenças , Fígado/patologia , Cirrose Hepática/induzido quimicamente , Niacinamida/administração & dosagem , Niacinamida/análogos & derivados , Compostos de Fenilureia/administração & dosagem , Ratos , Sorafenibe , Resultado do Tratamento , Peixe-Zebra
17.
Minerva Anestesiol ; 83(7): 749-761, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28402094

RESUMO

INTRODUCTION: Postoperative major adverse cardiac events (MACEs) are the main cause of postoperative mortality, and controversies exist regarding the effects of anesthesia methods on postoperative MACEs and mortality in high-risk cardiac patients after non-cardiac surgeries. EVIDENCE ACQUISITION: A Meta-analysis about the effect of anesthesia methods on postoperative MACEs and mortality in high-risk cardiac patients undergoing intermediate- or high-risk non-cardiac surgeries was conducted; Chinese databases (SinoMed, CNKI, Wanfang, and VIP) and English databases (Medline, EMBASE, PubMed, Springer, Ovid, the Cochrane Library, and Google scholar) were searched. EVIDENCE SYNTHESIS: Twenty-seven randomized controlled trials (RCTs) were included and 35340 patients were involved. The cardiac troponin I level (cTnI) on postoperative day 1 (MD: -0.39, 95% CI: -0.45--0.34, P<0.00001) and the incidence of myocardial ischaemia (OR: 0.43, 95% CI: 0.27-0.68, P=0.0004) within 3 postoperative days were significantly lower after sevoflurane anesthesia than propofol anesthesia. There were no differences in postoperative MACEs or in mortality within either 30 days or 1 year between sevoflurane and propofol anesthesia, or between N2O and non-N2O anesthesia. The cTnI on postoperative day 3 was significantly lower from epidural anesthesia combined with general anesthesia (GA) than from GA alone (MD: -0.61, 95% CI: -0.75--0.47, P<0.00001). However, there were no differences in myocardial infarction or mortality between epidural anesthesia combined with GA and GA alone, or between spinal anesthesia alone and GA alone. CONCLUSIONS: Sevoflurane anesthesia, or epidural combined with general anesthesia can provide short-term myocardial protective effect in high-risk cardiac patients undergoing intermediate- or high-risk non-cardiac surgeries.


Assuntos
Anestesia/métodos , Cardiopatias/mortalidade , Complicações Pós-Operatórias/mortalidade , Anestesia/efeitos adversos , Cardiopatias/etiologia , Humanos , Complicações Pós-Operatórias/etiologia , Ensaios Clínicos Controlados Aleatórios como Assunto
18.
Artigo em Inglês | MEDLINE | ID: mdl-27340417

RESUMO

Salvianolate is widely used to treat angiocardiopathy in clinic in China, but its application in liver diseases remains unclear. Our study aims to investigate the effect of Salvianolate on rat hepatic injury by protecting hepatocyte mitochondria. To evaluate the effects of Salvianolate on injured hepatocytes, alpha mouse liver 12 (AML-12) cells were induced with hydrogen peroxide (H2O2) and treated with Salvianolate. Cell viability and MitoTracker Green for mitochondria and 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazole-carbocyanide iodine (JC-1) levels and cytochrome C (Cyto-C) expressions were detected in vitro. To identify the effect of Salvianolate on protecting against mitochondria injury, male Wistar rats were injected with carbon tetrachloride (CCl4) and treated with Salvianolate (40 mg·kg(-1)). Serum liver function, parameters for peroxidative damage, hematoxylin and eosin (H&E) staining, and transmission electron microscope (TEM) of hepatocyte mitochondria were assayed. Our results showed that Salvianolate effectively protected hepatocytes, increased mitochondria vitality, and decreased Cyto-C expressions in vitro. Besides, Salvianolate alleviated the liver function, attenuated the indicators of peroxidation, and relieved the mitochondria injury in vivo. In conclusion, Salvianolate is effective in protecting hepatocytes from injury in vitro and in vivo, and the mechanism might be related to its protective effect on hepatocyte mitochondria against oxidative stress.

19.
Ying Yong Sheng Tai Xue Bao ; 27(1): 173-81, 2016 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-27228607

RESUMO

In this study, field trials were conducted to examine the effects of cotton stalk biochar on microbial population, function and structural diversity of microorganisms in rhizosphere soil of continuous cotton cropping field in Xinjiang by plate count, Biolog and DGGE methods. The experiment was a factorial design with four treatments: 1) normal fertilization with cotton stalk removed (NPK); 2) normal fertilization with cotton stalk powdered and returned to field (NPKS); 3) normal fertilization plus cotton stalk biochar at 22.50 t · hm⁻² (NPKB1); and 4) normal fertilization plus cotton stalk biochar at 45.00 t · hm⁻² (NPKB2). The results showed that cotton stalk biochar application obviously increased the numbers of bacteria and actinomycetes in the rhizospheric soil. Compared with NPK treatment, the number of fungi was significantly increased in the NPKB1treatment, but not in the NPKB2 treatment. However, the number of fungi was generally lower in the biochar amended (NPKB1, NPKB2) than in the cotton stalk applied plots (NPKS). Application of cotton stalk biochar increased values of AWCD, and significantly improved microbial richness index, suggesting that the microbial ability of utilizing carbohydrates, amino acids and carboxylic acids, especially phenolic acids was enhanced. The number of DGGE bands of NPKB2 treatment was the greatest, with some species of Gemmatimonadetes, Acidobacteria, Proteobacteria and Actinobacteria being enriched. UPGMC Cluster analysis pointed out that bacterial communities in the rhizospheric soil of NPKB2 treatment were different from those in the NPK, NPKS and NPKB1treatments, which belonged to the same cluster. These results indicated that application of cotton stalk biochar could significantly increase microbial diversity and change soil bacterial community structure in the cotton rhizosphere soil, thus improving the health of soil ecosystem.


Assuntos
Carvão Vegetal/química , Fertilizantes , Gossypium/química , Rizosfera , Microbiologia do Solo , Bactérias , China , Ecossistema , Fungos , Caules de Planta/química , Solo/química
20.
Neural Regen Res ; 11(2): 312-8, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27073386

RESUMO

To investigate the pattern of neural differentiation and synaptogenesis in the mouse retina, immunolabeling, BrdU assay and transmission electron microscopy were used. We show that the neuroblastic cell layer is the germinal zone for neural differentiation and retinal lamination. Ganglion cells differentiated initially at embryonic day 13 (E13), and at E18 horizontal cells appeared in the neuroblastic cell layer. Neural stem cells in the outer neuroblastic cell layer differentiated into photoreceptor cells as early as postnatal day 0 (P0), and neural stem cells in the inner neuroblastic cell layer differentiated into bipolar cells at P7. Synapses in the retina were mainly located in the outer and inner plexiform layers. At P7, synaptophysin immunostaining appeared in presynaptic terminals in the outer and inner plexiform layers with button-like structures. After P14, presynaptic buttons were concentrated in outer and inner plexiform layers with strong staining. These data indicate that neural differentiation and synaptogenesis in the retina play important roles in the formation of retinal neural circuitry. Our study showed that the period before P14, especially between P0 and P14, represents a critical period during retinal development. Mouse eye opening occurs during that period, suggesting that cell differentiation and synaptic formation lead to the attainment of visual function.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA