Consulta: creatorFacets:"Wang,T."
Registros recuperados: 5
Data/hora: 17/06/2024 01:22:19

Ischemic post-conditioning attenuates the intestinal injury induced by limb ischemia/reperfusion in rats
Provedor de dados: 56
Autores: Leng,Y.F.; Zhang,Y.; Zhang,Y.; Xue,X.; Wang,T.; Kang,Y.Q.
The purpose of this study was to investigate the protective effects of ischemic post-conditioning on damage to the barrier function of the small intestine caused by limb ischemia-reperfusion injury. Male Wistar rats were randomly divided into 3 groups (N = 36 each): sham operated (group S), lower limb ischemia-reperfusion (group LIR), and post-conditioning (group PC). Each group was divided into subgroups (N = 6) according to reperfusion time: immediate (0 h; T1), 1 h (T2), 3 h (T3), 6 h (T4), 12 h (T5), and 24 h (T6). In the PC group, 3 cycles of reperfusion followed by ischemia (each lasting 30 s) were applied immediately. At all reperfusion times (T1-T6), diamine oxidase (DAO), superoxide dismutase (SOD), and myeloperoxidase (MPO) activity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Post-conditioning; Limb ischemia-reperfusion injury; Small intestine.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000500005

Putative role of ischemic postconditioning in a rat model of limb ischemia and reperfusion: involvement of hypoxia-inducible factor-1α expression
Provedor de dados: 56
Autores: Wang,T.; Zhou,Y.T.; Chen,X.N.; Zhu,A.X.
Hypoxia-inducible factor-1α (HIF-1α) is one of the most potent angiogenic growth factors. It improves angiogenesis and tissue perfusion in ischemic skeletal muscle. In the present study, we tested the hypothesis that ischemic postconditioning is effective for salvaging ischemic skeletal muscle resulting from limb ischemia-reperfusion injury, and that the mechanism involves expression of HIF-1α. Wistar rats were randomly divided into three groups (n=36 each): sham-operated (group S), hindlimb ischemia-reperfusion (group IR), and ischemic postconditioning (group IPO). Each group was divided into subgroups (n=6) according to reperfusion time: immediate (0 h, T0), 1 h (T1), 3 h (T3), 6 h (T6), 12 h (T12), and 24 h (T24). In the IPO group, three cycles of 30-s...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypoxia-inducible factor-1α; Ischemic postconditioning; Skeletal muscle ischemia.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000900738

Investigation on the nasal airflow characteristics of anterior nasal cavity stenosis
Provedor de dados: 56
Autores: Wang,T.; Chen,D.; Wang,P.H.; Chen,J.; Deng,J.
We used a computational fluid dynamics (CFD) model to study the inspiratory airflow profiles of patients with anterior nasal cavity stenosis who underwent curative surgery, by comparing pre- and postoperative airflow characteristics. Twenty patients with severe anterior nasal cavity stenosis, including one case of bilateral stenosis, underwent computed tomography (CT) scans for CFD modelling. The pre- and postoperative airflow characteristics of the nasal cavity were simulated and analyzed. The narrowest area of the nasal cavity in all 20 patients was located within the nasal valve area, and the mean cross-sectional area increased from 0.39 cm2 preoperative to 0.78 cm2 postoperative (P&lt;0.01). Meanwhile, the mean airflow velocity in the nasal valve area...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anterior nasal cavity stenosis; Computational fluid dynamics; Nasal valve area; Airflow characteristics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000900704

Control of respiration in fish, amphibians and reptiles
Provedor de dados: 56
Autores: Taylor,E.W.; Leite,C.A.C.; McKenzie,D.J.; Wang,T.
Fish and amphibians utilise a suction/force pump to ventilate gills or lungs, with the respiratory muscles innervated by cranial nerves, while reptiles have a thoracic, aspiratory pump innervated by spinal nerves. However, fish can recruit a hypobranchial pump for active jaw occlusion during hypoxia, using feeding muscles innervated by anterior spinal nerves. This same pump is used to ventilate the air-breathing organ in air-breathing fishes. Some reptiles retain a buccal force pump for use during hypoxia or exercise. All vertebrates have respiratory rhythm generators (RRG) located in the brainstem. In cyclostomes and possibly jawed fishes, this may comprise elements of the trigeminal nucleus, though in the latter group RRG neurons have been located in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vertebrates; Control of respiration; Respiratory rhythm generation; Water and air breathing; Chemoreceptors; Mechanoreceptors.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000500001

Effects of propofol on lipopolysaccharide-induced expression and release of HMGB1 in macrophages
Provedor de dados: 56
Autores: Wang,T.; Wei,X.Y.; Liu,B.; Wang,L.J.; Jiang,L.H.
This study aimed to determine the effects of different concentrations of propofol (2,6-diisopropylphenol) on lipopolysaccharide (LPS)-induced expression and release of high-mobility group box 1 protein (HMGB1) in mouse macrophages. Mouse macrophage cell line RAW264.7 cells were randomly divided into 5 treatment groups. Expression levels of HMGB1 mRNA were detected using RT-PCR, and cell culture supernatant HMGB1 protein levels were detected using enzyme-linked immunosorbent assay (ELISA). Translocation of HMGB1 from the nucleus to the cytoplasm in macrophages was observed by Western blotting and activity of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) in the nucleus was detected using ELISA. HMGB1 mRNA expression levels increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propofol; HMGB1; LPS; RAW 264.7 cells; NF-κB.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000400286