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Kaohsiung J Med Sci ; 35(8): 493-500, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31087766


The role of the voltage-gated sodium channel 1.7 (Nav1.7) is unclear in models of neuropathic pain induced by nerve injury. In the present study, we measured expression levels of Nav1.7 in two distinct neuropathic pain models: spinal nerve ligation (SNL) and chronic constriction injury (CCI). In the SNL model, both mRNA and protein levels of Nav1.7 were markedly lower in the L5 dorsal root ganglia (DRG) but were significantly higher in the L4 DRG. Nav1.7 protein levels were notably higher in both L4 and L5 DRGs under CCI conditions. We found that excessive damage of L5 nerves such as SNL reduced expression levels of Nav1.7 in the injured L5 DRG and activated the adjacent uninjured DRG, resulting in Nav1.7 level increases in the adjacent L4 DRG. We confirmed again that Nav1.7 was closely related to neuropathic pain induced by nerve injury. More importantly, our results suggest that tracing the molecular changes exclusively in the L5 DRG in SNL model may not completely explain the pain mechanism; it is necessary to study the adjacent uninjured L4 DRG.

J Thromb Thrombolysis ; 45(3): 463-465, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29478129


The imaging finding of hypo-attenuated leaflet thickening (HALT) on bioprosthesis after transcatheter aortic valve replacement (TAVR) has been reported. The underlying mechanism is not clear, but leaflet thrombosis is speculated to be the cause. Heterogeneous antiplatelet responses may play a role in the process. This is a prospective, single-center pilot study in patients who received successful TAVR from June 2012 to November 2016. HALT on post-procedural multi-detector computed tomography. We thoroughly genotyped 34 SNPs and 8 SNPs that have been reported for clopidogrel and aspirin resistance. A total of 148 patients were enrolled. There were 15 patients demonstrating signs of HALT. Patients with HALT had a higher rate of atrial fibrillation (AF) pre-TAVR (33.3 vs. 7.5%, P = 0.01). We found that rs4244285 G>A polymorphism of the CYP2C19 gene was associated with the risk of HALT in the overdominant model (OR 4.00 [1.15-13.97], P = 0.02 for GA vs. GG+AA) adjusted by sex and the presence of pre-TAVR AF. Antiplatelet drug resistance is a reasonable possibility involved in HALT. Potential directions were suggested in polymorphisms of the CYP2C19 gene.

Inibidores da Agregação de Plaquetas/uso terapêutico , Polimorfismo de Nucleotídeo Único , Substituição da Valva Aórtica Transcateter/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Aspirina/farmacologia , Aspirina/uso terapêutico , Clopidogrel , Citocromo P-450 CYP2C19/genética , Resistência a Medicamentos/genética , Feminino , Próteses Valvulares Cardíacas/efeitos adversos , Humanos , Masculino , Projetos Piloto , Estudos Prospectivos , Ticlopidina/análogos & derivados , Ticlopidina/farmacologia , Ticlopidina/uso terapêutico
Ying Yong Sheng Tai Xue Bao ; 26(12): 3803-10, 2015 Dec.
Artigo em Chinês | MEDLINE | ID: mdl-27112022


Human activity is the main driving force of the change of land cover and landscape patterns. However, there are few studies focusing on the mechanism of human-induced change of land cover and landscape patterns at village scale. In this study, taking low-slope hilly area of Dali City, Northwestern Yunnan Province as a case study area, high resolution satellite images were introduced to find out the rules of land cover and landscape pattern changes, i.e. GeoEye-1 of 2009 and World- View-3 of 2014. The object-oriented and human-computer-interaction approaches were applied to interpret the images using ArcGIS 10.2 and ENVI 5.2. The results showed that, the main land cover types in the study area were forest land, paddy field and dry land in 2009, with forest, bulldozed unbuilt ground and paddy field in 2014, accounting for 82.8% and 70.9% of the total area, respectively. The land cover transition showed that, during 2009-2014, the main land cover change flows were from forest land, paddy field and dry land, to bulldozed unbuilt ground and construction land. Furthermore, the area of bulldozed but unbuilt land had increased to be 531.57 hm² in 2014, which mainly came from forest land (42.8%), dry land (21.7%), and paddy field (14.2%). Landscape pattern change was characterized as the increase of patch quantity and density, the decrease of mean patch size, the complication of patch shape, the fragmentation of landscape patches, and the diversification of landscape patterns.

Agricultura , Florestas , Imagens de Satélites , China , Cidades , Atividades Humanas , Oryza
Yao Xue Xue Bao ; 49(2): 273-6, 2014 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-24761622


This study is to investigate the effect of Euphorbia humifusa effective fraction (EHEF) on the CYP51 enzyme activity, the lanosterol content and the MEP, SUB gene expression of Trichophyton rubrum. Trichophyton rubrum was treated by EHEF for 7 days at 26 degrees C. The activity of CYP51 enzyme of Trichophyton rubrum in the cell membrane was determined by using ELISA kit, and the lanosterol content was investigated by using high performance liquid chromatography (HPLC), and the MEP, SUB gene expression of Trichophyton rubrum was detected with the reverse transcription polymerase chain reaction (RT-PCR) method. Results showed that EHEF can decrease the membrane CYP51 enzyme activity, and it also can accumulate the fungal lanosterol in a dose-dependent manner, and it also can decrease the gene expression of MEP and SUB. The antifungal mechanism of EHEF may be related to the inhibition on CYP51 enzyme activity, and to the effects on fungal cell membrane ergosterol biosynthesis. It may also play an antifungal effect by inhibiting the MEP, SUB gene expression of fungal proteases.

Antifúngicos/farmacologia , Medicamentos de Ervas Chinesas/farmacologia , Euphorbia/química , Metaloproteases/metabolismo , Subtilisinas/metabolismo , Trichophyton/metabolismo , Antifúngicos/isolamento & purificação , Membrana Celular/efeitos dos fármacos , Membrana Celular/metabolismo , Medicamentos de Ervas Chinesas/isolamento & purificação , Ativação Enzimática/efeitos dos fármacos , Regulação Fúngica da Expressão Gênica , Lanosterol/metabolismo , Plantas Medicinais/química , Esterol 14-Desmetilase/metabolismo , Trichophyton/efeitos dos fármacos , Trichophyton/genética