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1.
Acta Anatomica Sinica ; (6): 104-108, 2010.
Artigo em Chinês | WPRIM | ID: wpr-404339

RESUMO

Objective To investigate the expression and effects of endothelin-1 (ET-1) in cerebral vessels of scalded rats. MethodHistological method was used to observe the alteration of histological structure of basilar artery in 8 scalded rats. Reverse transcription polymerase chain reaction(RT-PCR) was performed to examine expression of ET-1 mRNA;Western blotting to analyse expression of endothelin-1;radioimmunoassay to measure ET-1 levels;R3espectively, of cerebral basilar artery in 48 scalded rats. ResultVascular pathohistological changes were observed in cerebral basilar artery after rats were scalded;ET-1, ET-1 mRNA expression and ET-1 levels of basilar artery in scald 6 hours, 12 hours and 24 hours group were obviously higher than that of control group. Conclusion Scald may cause an increases of ET-1 expression in basilar artery, and elevated ET-1 expression may relate to the pathogenesis of cerebral vascular injury in scalded rats.

2.
Chinese Journal of Burns ; (6): 102-104, 2002.
Artigo em Chinês | WPRIM | ID: wpr-289178

RESUMO

<p><b>OBJECTIVE</b>To explore the influence of lanthanum chloride on the TNFalpha expression of murine peritoneal macrophages stimulated by lipopolysaccharide (LPS).</p><p><b>METHODS</b>Murine peritoneal macrophages (Mphi) were isolated, cultured and then stimulated by LPS. The influence of lanthanum chloride on the TNFalpha secretion and TNFalphamRNA expression of murine Mphi stimulated by LPS was determined by ELISA method and SYBR green fluorescence quantitative RT-PCR. Forty BALB/C mice were randomly divided into two groups and were treated by lethal dose of LPS and lanthanum chloride processed LPS, respectively. The mortality within 7 days was observed.</p><p><b>RESULTS</b>The TNFalpha secretion and TNFalphamRNA expression level of the Mphi from mice treated by lanthanum chloride processed LPS were obviously lower than those by LPS only (P < 0.01). The mortality of the mice treated by lethal dose of LPS which has been processed by lanthanum chloride was significantly lower than that by lethal dose of LPS only.</p><p><b>CONCLUSION</b>Lanthanum chloride possessed the capacity of lowering down the toxicity of LPS and inhibiting the TNFalpha secretion and TNFalphamRNA expression in murine Mphi stimulated by LPS.</p>


Assuntos
Animais , Feminino , Masculino , Camundongos , Células Cultivadas , Regulação da Expressão Gênica , Lantânio , Farmacologia , Lipopolissacarídeos , Farmacologia , Toxicidade , Macrófagos Peritoneais , Biologia Celular , Metabolismo , Camundongos Endogâmicos BALB C , RNA Mensageiro , Genética , Metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Fator de Necrose Tumoral alfa , Genética , Secreções Corporais
3.
Chinese Journal of Hematology ; (12): 531-533, 2002.
Artigo em Chinês | WPRIM | ID: wpr-261387

RESUMO

<p><b>OBJECTIVE</b>To explore the synergic effect of heparan sulfate (HS) and cytokines on the growth of human umbilical cord blood (UCB) hematopoietic cells.</p><p><b>METHODS</b>Hematopoietic cells from human UCB were cultured with (1) cytokines (rhIL-3, rhIL-1beta, rhIL-6 and SCF) or (2) SN (supernatant from cultured human marrow stromal cells) and cytokines, or (3) SN, or (4) HS and cytokines. Cellular proliferation, CFU-GM yields and changes of cell immunophenotype were observed.</p><p><b>RESULTS</b>Hematopoietic cell proliferation reached peak at the 14th day. The number of total nucleated cells increased 134.5-, 171.3-, 81.5- and 167.2-fold in (1), (2), (3) and (4) groups, respectively, at the 21th day, the (3) group significantly decreased. CD(34)(+) cells increased at the 7th day and reached peak, at the 14th day with a percentage of 68.4%, 82.5%, 69.8% and 79.3%, and at the 21th day 56.2%, 71.7.%, 12.3% and 73.3%, respectively. CD(33)(+) cells reached peak at the 14th day and increased by 80.2%, 68.6%, 81.6% and 70.3%, respectively, and remained these levels at the 21th day. CD(38)(+) cells increased by 66.6%, 73.8%, 70.4% and 71.9% at the 7th day and remained this level at the 14th and the 21th day. From the first week of culture, the percentage of CFU-GM increased in all of the four groups, at the second week of culture, it increased by 250%, 279%, 217% and 273%, and at the third week still increased by 151%, 240%, 145% and 231%, respectively.</p><p><b>CONCLUSION</b>The combination of SN and cytokines have a synergic effect in promoting proliferation of hematopoietic cell from human UCB. The synergic effect remained the same when SN was replaced by heparan sulfate.</p>


Assuntos
Humanos , Recém-Nascido , ADP-Ribosil Ciclase , ADP-Ribosil Ciclase 1 , Antígenos CD , Antígenos CD34 , Antígenos de Diferenciação Mielomonocítica , Divisão Celular , Células Cultivadas , Citocinas , Farmacologia , Sinergismo Farmacológico , Sangue Fetal , Biologia Celular , Alergia e Imunologia , Heparitina Sulfato , Farmacologia , Interleucina-1 , Farmacologia , Interleucina-3 , Farmacologia , Leucócitos Mononucleares , Biologia Celular , Alergia e Imunologia , Glicoproteínas de Membrana , Proteínas Recombinantes , Farmacologia , Lectina 3 Semelhante a Ig de Ligação ao Ácido Siálico , Fatores de Tempo
4.
Chinese Traditional and Herbal Drugs ; (24)1994.
Artigo em Chinês | WPRIM | ID: wpr-574391

RESUMO

Objective To investigate the effect of sasanquasaponin (SQS) on injury of endothelial cells induced by hypoxia-reoxygenation and neutrophil adhesion, and its possible mechanisms. Methods Human umbilical vein endothelial cells (HUVEC) were exposed to normoxia or hypoxia-reoxygenation in the absence or presence of SQS (10.0, 1.0, and 0.1 ?mol/L). Lactate dehydrogenase (LDH) activity was determined in cultured HUVEC supernatants. HUVEC survival rate, neutrophil adhesion rate, malondialdehyde (MDA) level superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were measured. Neutrophil adhesion was assayed in additional HUVEC treated as above. Results The results showed that hypoxia-reoxygenation resulted in HUVEC injury and enhancement of neutrophil adhesion, with the increase in LDH activity, MDA level, and adhesion rate as well, conversely, with the decrease in activity of SOD and GSH-Px; SQS antagonized these changes in a concentration-dependent manner. Conclusion SQS may protect HUVEC against hypoxia-reoxygenation injury and its mechanism appeares to be related to anti-lipoperoxidization and anti-adhesion of white blood cell.

5.
Journal of Xi'an Jiaotong University(Medical Sciences) ; (6)1981.
Artigo em Chinês | WPRIM | ID: wpr-543026

RESUMO

Objective To build artificial dermis by using the acellular dermis,collagen membrane and collagen gel as scaffolds.Methods The fibroblasts were isolated from infant skin.The 3~(rd) generation cells were seeded into 3 different scaffolds.The artificial dermis was detected by HE staining,phase contrast microscope or scanning electron microscope.Results The fibroblasts implanted on the ADM began to rupture and died after 2 to 3 days.Though the fibroblasts proliferated well in collagen gel,the artificial dermis contracted obviously.Another artificial dermis contracted slightly by inoculating fibroblasts on collagen membrane,and the fibroblasts on them were in appropriate proliferation.Conclusion The artificial dermis built by collagen membrane as scaffolds has a preferable structure for an ideal substitute of skin.

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