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1.
Front Oncol ; 11: 751758, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34765557

RESUMO

Post-radiation soft tissue sarcomas (PRSTSs) are rare secondary malignancies. In this report, we describe the clinical presentation of a 52-year-old woman who underwent postmastectomy radiation therapy (PMRT) for left-sided breast cancer 2.7 years ago and presented with a left internal mammary mass and left interpectoral nodule on computed tomography. On further evaluation, she was diagnosed with internal mammary rhabdomyosarcoma and interpectoral nodal breast cancer relapse, and was treated with chemotherapy, followed by surgery and endocrine therapy. She developed left pleural metastases and is currently receiving targeted therapy. Internal mammary rhabdomyosarcomas are rare among PRSTSs and pose a diagnostic challenge for patients with breast cancer. Histological evaluation is important for the differential diagnosis of breast cancer relapses with secondary malignancies. The management of post-radiation thoracic rhabdomyosarcomas is challenging, and the prognosis is poor.

2.
Front Behav Neurosci ; 15: 747733, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34803624

RESUMO

Tai Chi Chuan (TCC) is assumed to exert beneficial effects on functional brain activity and cognitive function in elders. Until now, empirical evidence of TCC induced intra-regional spontaneous neural activity and inhibitory control remains inconclusive. Whether the effect of TCC is better than that of other aerobic exercises is still unknown, and the role of TCC in younger adults is not yet fully understood. Here we used resting-state functional MRI (fMRI) to investigate the effects of 8-week TCC (n = 12) and brisk walking (BW, n = 12) on inhibitory control and fractional amplitude of low-frequency fluctuations (fALFF). The results found that TCC had significant effects on inhibitory control performance and spontaneous neural activity that were associated with significantly increased fALFF in the left medial superior frontal gyrus (Cohen's d = 1.533) and the right fusiform gyrus (Cohen's d = 1.436) and decreased fALFF in the right dorsolateral superior frontal gyrus (Cohen's d = 1.405) and the right paracentral lobule (Cohen's d = 1.132).TCC exhibited stronger effects on spontaneous neural activity than the BW condition, as reflected in significantly increased fALFF in the left medial superior frontal gyrus (Cohen's d = 0.862). There was a significant positive correlation between the increase in fALFF in the left medial superior frontal gyrus and the enhancement in inhibitory control performance. The change in fALFF in the left medial superior frontal gyrus was able to explain the change in inhibitory control performance induced by TCC. In conclusion, our results indicated that 8 weeks of TCC intervention could improve processing efficiency related to inhibitory control and alter spontaneous neural activity in young adults, and TCC had potential advantages over BW intervention for optimizing spontaneous neural activity.

3.
Artigo em Inglês | MEDLINE | ID: mdl-34283015

RESUMO

A novel pale orange-coloured bacterium, designated strain SYSU D00532T, was isolated from sandy soil collected from the Gurbantunggut desert in Xinjiang, PR China. Cells of strain SYSU D00532T were found to be aerobic, Gram-stain-negative, oxidase-positive, catalase-positive, motile and rod-shaped with a single polar or subpolar flagellum. Growth occurred at 15-45 °C (optimum, 28-37 °C, pH 5.0-8.0 (optimum, pH 6.0-7.0) and with 0-1.5% NaCl (w/v; optimum, 0.5 %). The major polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and phosphatidylglycerol. Unidentified aminolipids, unidentified polar lipids, an unidentified aminophospholipid and an unidentified phospholipid were also detected. The major respiratory quinone was ubiquinone-10 and the major fatty acids were summed feature 8 (C18:1 ω7c and/or C18:1 ω6c), C16:0 and C19:0 cyclo ω8c. The genomic DNA G+C content was 69.8 mol%. Results of phylogenetic analysis based on 16S rRNA gene sequences indicated that strain SYSU D00532T belonged to the family Azospirillaceae and showed 93.4% (Desertibacter roseus 2622T), 93.2% (Skermanella xinjiangensis 10-1-101T), 93.2% ('Skermanella rubra' YIM 93097T) and 92.4% (Desertibacter xinjiangensis M71T) similarities. Based on the phylogenetic, phenotypic and chemotaxonomic data, strain SYSU D00532T is proposed to represent a new species of a new genus, named Arenibaculum pallidiluteum gen. nov., sp. nov., within the family Azospirillaceae. The type strain is SYSU D00532T (=KCTC 82269T=CGMCC 1.18631T=MCCC 1K04984T). We also propose the reclassification of Skermanella xinjiangensis to a new genus Deserticella as Deserticella xinjiangensis comb. nov., and the transfer of the genera Indioceanicola and Oleisolibacter from the family Rhodospirillaceae to the family Azospirillaceaewe based on the phylogenetic results.


Assuntos
Filogenia , Rhodospirillaceae/classificação , Microbiologia do Solo , Técnicas de Tipagem Bacteriana , China , DNA Bacteriano/genética , Clima Desértico , Pigmentação , Rhodospirillaceae/isolamento & purificação , Análise de Sequência de DNA , Ubiquinona/análogos & derivados , Ubiquinona/química
4.
Ecotoxicol Environ Saf ; 220: 112345, 2021 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-34020283

RESUMO

Microplastics (MPs) and tributyltin (TBT) are both potential environmental pollutants that enter organisms through the food chain and affect bodily functions. However, the effects and mechanisms of MPs and TBT exposure (especially the co-exposure of both pollutants) on mammals remain unclear. In this study, Ф5µm MPs (5MP) was administered alone or in combination with TBT to investigate the health risk of oral exposure in mice. All three treatments induced inflammation in the liver, altered gut microbiota composition and disturbed fecal bile acids profiles. In addition to decreasing triglyceride (TG) and increasing aspartate aminotransferase (AST) and macrophage-expressed gene 1 (Mpeg1), 5MP induced hepatic cholestasis by stimulating the expression of the cholesterol hydroxylase enzymes CYP8B1 and CYP27A1, and inhibiting multidrug resistance-associated protein 2 and 3 (MRP2, MRP3), and bile-salt export pump (BSEP) to prevent bile acids for entering the blood and bile. Correspondingly, 5MP treatment decreased 7-ketolithocholic acid (7-ketoLCA) and taurocholic acid (TCA), which were positively correlated with decreased Bacteroides and Marvinbryantia and negatively correlated with increased Bifidobacterium. In addition, TBT increased interferon γ (IFNγ) and Mpeg1 levels to induce inflammation, accompanied by decreased 7-ketoLCA, tauro-alpha-muricholic acid (T-alpha-MCA) and alpha-muricholic acid (alpha-MCA) levels, which were negatively related to Coriobacteriaceae_UCG-002 and Bifidobacterium. Co-exposure to 5MP and TBT also decreased TG and induced bile acids accumulation in the liver due to inhibited BSEP, which might be attributed to the co-regulation of decreased T-alpha-MCA and Harryflintia. In conclusion, the administration of 5MP and TBT alone and in combination could cause gut microbiome dysbiosis and subsequently alter bile acids profiles, while the combined exposure of 5MP and TBT weakened the toxic effects of 5MP and TBT alone.


Assuntos
Ácidos e Sais Biliares/metabolismo , Poluentes Ambientais/efeitos adversos , Microbioma Gastrointestinal/efeitos dos fármacos , Poliestirenos/efeitos adversos , Compostos de Trialquitina/efeitos adversos , Animais , Bactérias/metabolismo , Microbioma Gastrointestinal/fisiologia , Masculino , Metaboloma , Metabolômica , Camundongos , Camundongos Endogâmicos C57BL , Microplásticos/efeitos adversos , RNA Bacteriano/análise , RNA Ribossômico 16S/análise
5.
Chemosphere ; 276: 130212, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33740654

RESUMO

Rice as a paddy field crops, iron-containing materials application could induce its iron plaque formation, thereby affecting cadmium (Cd) transportation in the rhizosphere and its uptake in root. In this study, a hydroponic experiment was conducted to investigate the effects of three exogenous iron materials, namely nano-Fe3O4-modified biochar (BC-Fe), chelated iron (EDTA-Fe), and ferrous sulfate (FeSO4), on the iron plaque formation on the surface of rice root, and to investigate the effects of formed iron plaque on the absorption, migration, and transportation of Cd and Fe in rice plant. The results showed that yellow-brown and brown iron plaque was formed on surface cells of the Fe-treated rice root, and some black particles were embedded in the iron plaque formed by BC-Fe. The proportion of crystallized iron plaque (31.8%-35.9%) formed by BC-Fe was much higher than that formed by EDTA-Fe and FeSO4. The Cd concentrations in the crystallized iron plaque formed by BC-Fe were 7.64-13.0 mg·kg-1, and increased with the increasing of Fe concentrations in the plaque. The Cd translocation factor from root to stem (TFr-s) and the Cd translocation factor from stem to leaf (TFs-l) with BC-Fe treatment decreased by 84.7% and 80.0%, respectively. The results demonstrated that application BC-Fe promoted the formation of iron plaque and enhanced the sequestration of Cd and Fe in roots, thus reduced the transportation and accumulation of Cd in aerial rice tissues.


Assuntos
Oryza , Poluentes do Solo , Cádmio/análise , Carvão Vegetal , Ferro/análise , Raízes de Plantas/química , Solo , Poluentes do Solo/análise
6.
Environ Sci Pollut Res Int ; 28(14): 18050-18061, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33410055

RESUMO

Arsenic (As)-contaminated paddy soil could result in elevated levels of As in rice plants and sequentially harm human health. The Fe3O4-modified biochar (NBC-Fe) prepared by the coprecipitation method was applied in a pot experiment to investigate its effect on mobility and bioavailability of As in soil and to reduce As accumulation in rice tissues (brown rice, husks, spikelets, leaves, stems, and roots). Compared with non-application (CK), application of NBC-Fe significantly increased the cation exchange capacity (CEC), decreased As availability, and raised the As concentration of crystalline hydrous oxide-bound fraction in the soil. The addition of 0.05-1.6% (w/w) NBC-Fe significantly reduced the As concentrations in brown rice by 9.4-47.3%, which was lower than the level set by the National Food Safety Standards of China (0.2 mg/kg). The NBC-Fe treatment decreased As concentrations in iron plaque (DCB-As), and the DCB-As had the very significant correlations (P < 0.01) with the As concentrations in different rice tissues (brown rice, husks, spikelets, leaves, stems, and roots). The NBC-Fe immobilized As to decrease As availability in soil and increased the amount and thickness of iron plaque to sequester As on the surfaces of rice root. This study demonstrates that NBC-Fe is a promising soil amendment for the remediation of As-contaminated soil, therefore reducing As accumulation in rice plant and safety risks for rice consumption.


Assuntos
Arsênio , Oryza , Poluentes do Solo , Arsênio/análise , Cádmio/análise , Carvão Vegetal , China , Humanos , Raízes de Plantas/química , Solo , Poluentes do Solo/análise
8.
Huan Jing Ke Xue ; 41(8): 3855-3861, 2020 Aug 08.
Artigo em Chinês | MEDLINE | ID: mdl-33124363

RESUMO

A field experiment involving eight treatments with water management combined with leaf spraying silicon fertilizer was conducted in a paddy field heavily contaminated with Cd (2.83 mg·kg-1) to study the effects of these treatments on rice growth and Cd accumulation in different rice tissues. The results showed that:① the treatments had no significant effects on rice plant height or number of tillers, but increased the biomass of brown rice by 1.7% to 25.0%. Among the eight treatments, that of water flooding during the rice maturation period plus leaf spraying silicon fertilizer (CY) resulted in the highest amount of brown rice yield. ② The treatment of conventional water management plus leaf spraying silicon fertilizer (Si) had no significant effect on the exchangeable Cd content and TCLP extractable Cd content in soil, whereas the other treatments reduced the exchangeable Cd content by 7.8%-42.6% and the TCLP extractable Cd content by 20.0%-40.8%. ③ The Si treatment could reduce the Cd content in various rice tissues, with an overall decrease of 19.0% in brown rice. The other treatments significantly reduced the Cd content in various rice tissues. The treatment of moisture during the rice maturation period plus leaf spraying silicon fertilizer (CS) resulted in the highest reduction in the Cd content in brown rice (44.0%), and was followed by the treatments of batch-type water flooding during the entire rice growth period plus leaf spraying silicon fertilizer (JX; 36.4%), and moisture during the rice pustulation period plus leaf spraying silicon fertilizer (GS; 31.8%). ④ For paddy-fields that are contaminated with Cd to medium and heavy levels, the CS and JX treatments are recommended to manage rice production in order to significantly reduce the Cd content of brown rice whilst having little effect on the rice yield.


Assuntos
Oryza , Poluentes do Solo , Cádmio/análise , Fertilizantes/análise , Folhas de Planta/química , Silício , Solo , Poluentes do Solo/análise , Água , Abastecimento de Água
9.
Medicine (Baltimore) ; 99(37): e21862, 2020 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-32925723

RESUMO

This study aimed to compare the early outcome of proximal femoral nail antirotation (PFNA) and bipolar hemiarthroplasty (BPH) in elderly intertrochanteric fractures (ITFs) patients aged 85 years or more.This is a prospective cohort study, and we analyzed 120 elderly patients aged 85 years or more presented with ITFs who underwent BPH and PFNA between January 2017 and July 2018. 84 patients treated with PFNA were set as Group A, and 36 patients treated with BPH were set as Group B. Data such as gender, age, period of follow-up, fracture classification (according to Evans-Jensen classification), preoperative ASA (American Society of Anesthesiologists) physical status, interval between injury and operation, method of anaesthesia, duration of operation time, blood loss during surgery, time of weight bearing after operation, incidence of complications 2 weeks after operation, mortality rates and Harris Hip Score 12 months after operation were recorded and compared.There are no statistically significant differences when compared general data in patients from group A and B (P > .05). Operation time in Group A is less than Group B (103.33, 40-230 min vs 122.64, 75-180 minute, P < .01). Blood loss during surgery in Group A is less than Group B (70.24, 50-100 mL vs 194.44, 100-500 mL, P < .01). Time of weight bearing after operation in Group A is longer than Group B (50.70, 7-100 days vs 6.67, 4-14 days, P < .01). Incidence of complications 2 weeks after operation in Group A is less than Group B (14.12% vs 36.11%, P < .01). Mortality rates 12 months after operation in Group A is similar with Group B (13.10% vs 19.44%, P > .05). Harris Hip Score 12 months after operation in Group A is similar with Group B (64.64,0-91 points vs 64.41, 0-90 points, P > .05).Although BPH and PFNA have similar functional outcome and mortality rates 12 months after operation, BPH has more postoperative complications in elderly patients aged 85 years or more with ITFs, Bipolar Hemiarthroplasty should not be selected as the primary option for ITFs in elderly patients aged 85 years or more.


Assuntos
Fixação Intramedular de Fraturas/mortalidade , Hemiartroplastia/mortalidade , Fraturas do Quadril/cirurgia , Complicações Pós-Operatórias/mortalidade , Idoso de 80 Anos ou mais , Pinos Ortopédicos , Feminino , Fixação Intramedular de Fraturas/métodos , Avaliação Geriátrica , Hemiartroplastia/métodos , Fraturas do Quadril/mortalidade , Humanos , Masculino , Duração da Cirurgia , Complicações Pós-Operatórias/etiologia , Estudos Prospectivos , Resultado do Tratamento
10.
Preprint em Inglês | medRxiv | ID: ppmedrxiv-20092882

RESUMO

BackgroundThe new coronavirus pneumonia (COVID-19) has evolved into a global pandemic disease, and the epidemiological characteristics of the disease have been reported in detail. However, many patients with new coronary pneumonia have comorbidities, and there are few researches reported in this special population. Methodsa retrospective analysis was performed on 132 consecutive COVID-19 patients with comorbidities from January 19, 2020 to March 7, 2020 in Hubei Third Peoples Hospital. Patients were divided into mild group and critical group and were followed up to the clinical endpoint. The observation biomarkers include the clinical feature, blood routine, blood biochemistry, inflammation biomarkers, and coagulation function. Univariate and multivariate logistic regression was used to analyze the risk factors associated with death. Results132 patients were enrolled in this study and divided into the mild group (n=109, 82.6%) and critical group (n=23, 17.4%), of whom 119 were discharged and 13 were died in hospital. The all-cause mortality rate was 9.8%, of which 7 patients died of respiratory failure, 5 patients died of heart failure, and 1patient died of chronic renal failure. There was significant statistical difference of mortality rates between the mild group (5.5%) and the critical group (30.4%). The average time of hospitalization was 16.9 (9, 22) days. Hypertension was the most common comorbidity (n=90, 68.2%), followed by diabetes (n=45, 34.1%), coronary heart disease (31, 23.5%). Compared with the mild group, the patients were older in critical group (P <0.05), and neutrophils, neutrophil ratio, neutrophil-lymphocyte ratio (NLR), serum urea nitrogen (BUN), procalcitonin (PCT), C-reactive protein CRP), serum amyloid protein (SSA), N-terminal brain natriuretic peptide precursor (NT-pro BNP) were significantly increased (P <0.05). However, lymphocytes lymphocyte ratio, albumin were lower than those in the critical group (P <0.05). The patients were further divided into the survivor group (n=119, 90.2%) and the non-survivor group (n=13, 9.8%). Compared with the survivor group, the death rate of patients with coronary heart disease was significantly increased (53.8% vs 20.2%), and The neutrophil ratio, aspartate aminotransferase (AST), BUN, PCT, CRP, SAA, interleukin-6(IL-6) and D-dimer were significantly increased (P <0.05), while the lymphocytes and NLR reduced (P <0.05). Multivariate logistic stepwise regression analysis showed that the past medical history of coronary heart disease[OR:2.806 95%CI:0.971~16.795], decreased lymphocytes [OR: 0.040, 95%CI:0.001~2.306], increased AST[OR:1.026, 95%CI:1.000~1.052], increased SSA[OR:1.021, 95%CI:1.001~1.025], and increased D-dimer[OR:1.231, 95%CI:1.042~1.456] are risk factors associated with death in COVID-19 patients pneumonia with comorbidities. ConclusionThe mortality rate of COVID-19 patients with coronary heart disease is relatively high. In all patients, the lower lymphocytes, and higher NLR, BUN, PCT, CRP, SSA, D-dimer are significant characteristics. The past medical history of coronary heart disease, decreased lymphocytes, increased AST, SSA and D-dimer are risk factors associated with death in COVID-19 patients pneumonia with comorbidities

11.
Int J Syst Evol Microbiol ; 70(5): 3091-3095, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32238231

RESUMO

A Gram-stain-positive, facultatively anaerobic and non-motile strain, designated SYSUP0004T, was isolated from the tubers of Gastrodia elata Blume collected from Yunnan Province, PR China. The 16S rRNA gene sequence result showed that the strain SYSUP0004T shared low similarity (97.7 %) with the type strain of Cellulomonas marina. SYSUP0004T grew at pH 6.0-9.0 (optimum, pH 8.0), temperature 4-30 °C (optimum, 28 °C) and could tolerate NaCl up to 4 % w/v (optimum in the absence of NaCl). The cell-wall peptidoglycan type was A4ß with an interpeptide bridge l-ornithine-d-glutamic acid. Cell-wall sugars were mannose, ribose, glucose, galactose and fucose. The menaquinone was MK-9(H4). The major fatty acids were anteiso-C15:0, anteiso-C15 : 1 A, C16 : 0 and anteiso-C17 : 0. The polar lipids of SYSUP0004T were diphosphatidylglycerol, unidentified phosphoglycolipid, phosphatidylinositol mannosides and unidentified glycolipid. The genomic DNA G+C content was 76.5 %. The average nucleotide identity values between SYSUP0004T and members of the genus Cellulomonas were below the cut-off level (95-96 %) recommended as the ANI criterion for interspecies identity. Thus, based on the above results strain SYSUP0004T represents a novel species of the genus Cellulomonas, for which the name Cellulomonas endophytica sp. nov. is proposed. The type strain, SYSUP0004T (=KCTC 49025T=CGMCC 1.16405T).


Assuntos
Cellulomonas/classificação , Gastrodia/microbiologia , Filogenia , Técnicas de Tipagem Bacteriana , Composição de Bases , Cellulomonas/isolamento & purificação , China , DNA Bacteriano/genética , Ácidos Graxos/química , Glicolipídeos/química , Peptidoglicano/química , Fosfolipídeos/química , Tubérculos/microbiologia , RNA Ribossômico 16S/genética , Análise de Sequência de DNA , Vitamina K 2/análogos & derivados , Vitamina K 2/química
12.
Environ Pollut ; 260: 113970, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32014742

RESUMO

Nano-Fe3O4-modified biochar (BC-Fe) was prepared by the coprecipitation of nano-Fe3O4 on a rice husk biochar surface. The effects of BC-Fe on cadmium (Cd) bioavailability in soil and on Cd accumulation and translocation in rice (Oryza sativa L. cv. 'H You 518') were investigated in a pot experiment with 7 application rates (0.05-1.6%, w/w). BC-Fe increased the biomass of the rice plants except for the roots and affected the concentration and accumulation of Cd and Fe in the plants. The Cd concentrations of brown rice were significantly decreased by 48.9%, 35.6%, and 46.5% by the 0.05%, 0.2%, and 0.4% BC-Fe treatments, respectively. Soil cation exchange capacity (CEC) increased by 9.4%-164.1% in response to the application of BC-Fe (0.05-1.6%), while the soil Cd availability decreased by 6.81%-25.0%. However, 0.8-1.6% BC-Fe treatments promoted Cd transport to leaves, which could increase the risk of Cd accumulation in brown rice. Furthermore, BC-Fe application promoted the formation of iron plaque and enhanced the root interception of Cd. The formation of iron plaque reduced the toxicity of Cd to rice roots, but this barrier effect was limited and had an interval threshold (DCB-Fe: 22.5-27.3 g·kg-1) under BC-Fe treatments.


Assuntos
Cádmio/metabolismo , Oryza/metabolismo , Poluentes do Solo/metabolismo , Carvão Vegetal , Ferro , Raízes de Plantas , Solo
13.
Environ Sci Pollut Res Int ; 27(14): 16134-16144, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32103429

RESUMO

The use of Napier grass to remediate heavy metal-contaminated soil is a new phytoremediation technique. The objective of this study was to evaluate the ability of Napier grass (Pennisetum purpureum Schumach.) to remediate Cd- and Zn-contaminated cultivated soil under nonmowing and mowing and the possibility of safe utilization of the stem and leaf after detoxification by liquid extraction. Three Napier grass varieties, P. purpureum cv. Mott (PM), P. purpureum cv. Red (PR), and P. purpureum cv. Guiminyin (PG), were planted in a field with 3.74 mg kg-1 Cd and 321.26 mg kg-1 Zn for 180 days. The maximum amounts of Cd and Zn removed by PG were 197.5 and 5023.9 g ha-1, respectively, almost equaling those of hyperaccumulators. Compared with nonmowing, mowing did not decrease the Cd and Zn contents in various tissues but increased the biomasses of PM, PR, and PG by 86.6%, 18.9%, and 26.1%, respectively. Compared with nonmowing, the amounts of Cd removed by PM, PR, and PG under mowing increased by 110.5%, 40.0%, and 107.9%, respectively, and that of Zn increased by 63.0%, 53.1%, and 71.6%. The dominant Cd and Zn chemical fractions in Napier grass were the pectate- and protein-integrated fractions. After liquid extraction, although the nutrient element (Ca, K, Mg, and Mn) contents in the stem and leaf were reduced significantly, the Cd and Zn contents decreased below the limit of the Chinese Hygienic Standard for Feeds, and the crude protein content was largely retained. Such detoxified stems and leaves can be safely used as feeds or as raw materials for energy production.


Assuntos
Pennisetum , Poluentes do Solo/análise , Biodegradação Ambiental , Cádmio/análise , Raízes de Plantas/química , Solo , Zinco/análise
14.
J Zhejiang Univ Sci B ; 21(12): 990-998, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33843164

RESUMO

Disulfide-bond A oxidoreductase-like protein (DsbA-L) is a molecular chaperone involved in the multimerization of adiponectin. Recent studies have found that DsbA-L is related to metabolic diseases including gestational diabetes mellitus (GDM), and can be regulated by peroxisome proliferator-activated receptor γ (PPARγ) agonists; the specific mechanism, however, is uncertain. Furthermore, the relationship between DsbA-L and the novel adipokine chemerin is also unclear. This article aims to investigate the role of DsbA-L in the improvement of insulin resistance by PPARγ agonists in trophoblast cells cultured by the high-glucose simulation of GDM placenta. Immunohistochemistry and western blot were used to detect differences between GDM patients and normal pregnant women in DsbA-L expression in the adipose tissue. The western blot technique was performed to verify the relationship between PPARγ agonists and DsbA-L, and to explore changes in key molecules of the insulin signaling pathway, as well as the effect of chemerin on DsbA-L. Results showed that DsbA-L was significantly downregulated in the adipose tissue of GDM patients. Both PPARγ agonists and chemerin could upregulate the level of DsbA-L. Silencing DsbA-L affected the function of rosiglitazone to promote the phosphatidylinositol 3-kinase (PI3K)-protein kinase B (PKB)/AKT pathway. Therefore, it is plausible to speculate that DsbA-L is essential in the environment of PPARγ agonists for raising insulin sensitivity. Overall, we further clarified the mechanism by which PPARγ agonists improve insulin resistance.


Assuntos
Diabetes Gestacional/metabolismo , Glutationa Transferase/fisiologia , Resistência à Insulina , PPAR gama/agonistas , Adulto , Células Cultivadas , Quimiocinas/farmacologia , Feminino , Glutationa Transferase/genética , Humanos , PPAR gama/fisiologia , Gravidez , Gordura Subcutânea/metabolismo
15.
Int J Biol Sci ; 15(8): 1755-1770, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31360117

RESUMO

Diselenide-containing paclitaxel nanoparticles (SePTX NPs) indicated selectivity of cytotoxicity between cancerous and normal cells in our previous work. Herein, the mechanism is revealed by molecular biology in detail. Cancer cells and normal cells were treated with the SePTX NPs and cell proliferation was measured using 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2-H-tetrazolium bromide (MTT) assay and cell morphology. Measurement of reactive oxygen species (ROS) levels and biochemical parameters were employed to monitor oxidative stress of the cells. JC-1 assay was used to detect the mitochondrial dysfunction of the cells. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) analysis was used to detect apoptosis of the cells. Immunofluorescence analysis and western blotting were employed to monitor changes in signaling pathway-related proteins. Compared with PTX, SePTX NPs has a good selectivity to cancer cells and can obviously induce the proliferation damage of cancer cells, but has no significant toxicity to normal cells, indicating that SePTX NPs has a specific killing effect on cancer cells. The results of mechanism research show that SePTX NPs can successfully inhibit the depolymerization of microtubules and induce cell cycle arrest, which is related to the upregulation of p53 and CyclinB1. Simultaneously, SePTX NPs can successfully induce oxidative stress, cause mitochondrial dysfunction, resulting in mitochondrial pathway-mediated apoptosis, which is related to the upregulation of autophagy-related protein LC3-II. On the other hand, lewis lung cancer C57BL/6 mice were used to evaluate the anti-tumor effects of SePTX NPs in vivo. Our data show that SePTX NPs exhibited high inhibiting efficiency against the growth of tumors and were able to reduce the side effects. Collectively, these data indicate that the high antitumor effect and selective cytotoxicities of SePTX NPs is promising in future cancer therapy.


Assuntos
Nanopartículas/química , Paclitaxel/química , Compostos de Selênio/química , Animais , Western Blotting , Proliferação de Células/efeitos dos fármacos , Ciclina B1/genética , Ciclina B1/metabolismo , Células HeLa , Humanos , Marcação In Situ das Extremidades Cortadas , Células MCF-7 , Camundongos , Camundongos Endogâmicos C57BL , Paclitaxel/farmacologia , Compostos de Selênio/farmacologia
16.
Curr Med Sci ; 39(2): 190-195, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31016509

RESUMO

Preeclampsia (PE) remains a leading cause of maternal and perinatal morbidity and mortality in obstetrics worldwide. No effective treatments to reduce its incidence and severity in clinical practice are currently available. A variety of hypotheses have been generated aiming to explain the origins of PE, notably being the genetic predispositions and placental dysfunction. As regard to placental dysfunction, much progress has been made in basic research and several potential therapeutic targets have been identified. This review will discuss in detail the potential therapeutic targets in PE models including uteroplacental blood flow, oxidative stress, vasoactive factors and inflammation/immune response, and introduce the evolving technologies for placental research nowadays.


Assuntos
Placenta/patologia , Pré-Eclâmpsia/etiologia , Animais , Feminino , Humanos , Inflamação/etiologia , Inflamação/genética , Estresse Oxidativo/genética , Pré-Eclâmpsia/genética , Gravidez
17.
Int Immunopharmacol ; 71: 164-168, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30901679

RESUMO

Glaucoma eventually leads to optic nerve damage and vision loss without medical intervention. More than 50% of glaucoma caused blindness are attributed to primary angle closure glaucoma, particularly in Asians. It is reported that immune inflammation is involved in the progress of glaucoma. Increased inflammation cytokines are detected in the aqueous humor of chronic primary angle closure glaucoma (CPACG). IL-36, IL-37 and IL-38, are novel cytokines and are involved in many inflammatory diseases, including inflammatory bowel diseases and acute anterior uveitis, but the possible contributing role in the pathogenesis of CPACG is unclear. In our current study, increased IL-36, IL-37 and IL-38 were detected in the aqueous humor of CPACG compared with age-related cataract (ARC). Furthermore, a significant correlation was detected between mean deviation of visual field (MDVF) of CPACG and IL-36, IL-37 or IL-38, respectively. Our data suggest IL-36, IL-37 and IL-38 might contribute to the immunological mediated pathogenesis of CPACG, despite the eye being an immune-privileged organ under normal conditions. The precise underlying mechanism of these cytokines during the development of CPACG remains to be explored. Our findings may be useful in therapeutic targeting of specific pathology.


Assuntos
Humor Aquoso/metabolismo , Glaucoma de Ângulo Fechado/imunologia , Mediadores da Inflamação/metabolismo , Interleucina-1/metabolismo , Interleucinas/metabolismo , Visão Ocular/imunologia , Idoso , Idoso de 80 Anos ou mais , Humor Aquoso/imunologia , Doença Crônica , Feminino , Humanos , Degeneração Macular/imunologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos
18.
Medicine (Baltimore) ; 97(48): e13088, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30508887

RESUMO

RATIONALE: Lung adenocarcinoma is the most common pathologic pattern of lung cancer. During the past decades, a number of targeted agents have been explored to treat advanced lung adenocarcinoma. Recently, Crizotinib, the antagonist of anaplastic lymphoma kinase (ALK), has been widely used in ALK-rearranged lung cancer treatment. Crizotinib is generally well tolerated while its most frequent adverse events include visual disorders, gastrointestinal disturbances, cardiac and endocrine abnormalities. Rash caused by crizotinib is rarely seen, and there are few case reports of severe rash caused by crizotinib. PATIENT CONCERNS AND DIAGNOSES: Here we report cases of an 81-year-old man and a 66-year-old woman with ALK-rearranged advanced lung adenocarcinoma. When patients came to our department, they both had crizotinib-induced severe rash. INTERVENTIONS: Crizotinib was initiated as the 1st-line treatment without other therapies. We treated severe rash with traditional Chinese medicine (TCM) therapy called Zhiyang Pingfu liquid along with Western medicine. Zhiyang Pingfu liquid consists of Scutellaria baicalensis 20 g, Portulaca oleracea 30 g, Cortex Dictamni 30 g, Sophora flavescens 30 g, and other substances. Western medicine includes Minocycline hydrochloride tablets and Aprepitant capsules. OUTCOMES: Both patients achieved a partial response when treated with crizotinib, and suffered from severe rash. With Zhiyang Pingfu liquid and Western medicine, their rash gradually disappeared with no sign of cancer progression. Also the male patient did not relieve after taking only antibiotics (standard therapy) and anti-allergic medicine. LESSONS: Despite the dramatic benefit of crizotinib for patients with ALK rearrangement, crizotinib-induced severe rash needs to be dealt with caution. This is the 1st case in which TCM and Western medicine are used to successfully treat crizotinib-induced severe rash. The mechanism of crizotinib-induced rash deserves further attention in future research.


Assuntos
Antibacterianos/uso terapêutico , Crizotinibe/efeitos adversos , Exantema/induzido quimicamente , Exantema/tratamento farmacológico , Medicina Tradicional Chinesa/métodos , Minociclina/uso terapêutico , Adenocarcinoma de Pulmão/tratamento farmacológico , Idoso , Idoso de 80 Anos ou mais , Aprepitanto/uso terapêutico , Crizotinibe/uso terapêutico , Quimioterapia Combinada , Feminino , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Masculino
19.
Rev Sci Instrum ; 89(6): 064501, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29960510

RESUMO

Laser link acquisition is a key technology for inter-satellite laser ranging and laser communication. In this paper, we present an acquisition scheme based on the differential power sensing method with dual-way scanning, which will be used in the next-generation gravity measurement mission proposed in China, called Space Advanced Gravity Measurements (SAGM). In this scheme, the laser beams emitted from two satellites are power-modulated at different frequencies to enable the signals of the two beams to be measured distinguishably, and their corresponding pointing angles are determined by using the differential power sensing method. As the master laser beam and the slave laser beam are decoupled, the dual-way scanning method, in which the laser beams of both the master and the slave satellites scan uncertainty cones simultaneously and independently, can be used, instead of the commonly used single-way scanning method, in which the laser beam of one satellite scans and that of the other one stares. Therefore, the acquisition time is reduced significantly. Numerical simulation and experiments of the acquisition process are performed using the design parameters of the SAGM mission. The results show that the average acquisition time is less than 10 s for a scanning range of 1-mrad radius with a success rate of more than 99%.

20.
Aging Dis ; 9(2): 273-286, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29896416

RESUMO

SIRT3 is a class III histone deacetylase that modulates energy metabolism, genomic stability and stress resistance. It has been implicated as a potential therapeutic target in a variety of neurodegenerative diseases, including Parkinson's disease (PD). Our previous study demonstrates that SIRT3 had a neuroprotective effect on a rotenone-induced PD cell model, however, the exact mechanism is unknown. In this study, we investigated the underlying mechanism. We established a SIRT3 stable overexpression cell line using lentivirus infection in SH-SY5Y cells. Then, a PD cell model was established using rotenone. Our data demonstrate that overexpression of SIRT3 increased the level of the autophagy markers LC3 II and Beclin 1. After addition of the autophagy inhibitor 3-MA, the protective effect of SIRT3 diminished: the cell viability decreased, while the apoptosis rate increased; α-synuclein accumulation enhanced; ROS production increased; antioxidants levels, including SOD and GSH, decreased; and MMP collapsed. These results reveal that SIRT3 has neuroprotective effects on a PD cell model by up-regulating autophagy. Furthermore, SIRT3 overexpression also promoted LKB1 phosphorylation, followed by activation of AMPK and decreased phosphorylation of mTOR. These results suggest that the LKB1-AMPK-mTOR pathway has a role in induction of autophagy. Together, our findings indicate a novel mechanism by which SIRT3 protects a rotenone-induced PD cell model through the regulation of autophagy, which, in part, is mediated by activation of the LKB1-AMPK-mTOR pathway.

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