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首页> 外文期刊>Cell biology international. >Transcriptional activation of heme oxygenase-1 gene in mouse spleen, liver and kidney cells after treatment with lipopolysaccharide or hemoglobin.
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Transcriptional activation of heme oxygenase-1 gene in mouse spleen, liver and kidney cells after treatment with lipopolysaccharide or hemoglobin.

机译:用脂多糖或血红蛋白处理后,小鼠脾脏,肝和肾细胞中血红素加氧酶-1基因的转录激活。

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摘要

Heme oxygenase (HO)-1 catalyzes the conversion of heme to biliverdin, iron and carbon monoxide. HO-1 is induced by many reagents including heme, Hb and lipopolysaccharide (LPS). LPS is known to activate the HO-1 gene in cultured mouse liver and macrophage cells through oxidative activation of NF-kappaB. But little is known about the effect of LPS and Hb on the HO-1 gene in living organisms. To study this issue, we examined the HO-1 and its mRNA levels in mouse liver, spleen and kidney after intravenous administration of LPS and Hb. On LPS treatment, the amount of HO-1 and its mRNA increased markedly mainly in mouse spleen, but on Hb treatment the amounts of HO-1 and its mRNA increased slightly only in liver. Run-off transcription assay supported the above results and band shift assays also revealed that LPS significantly activates an NF-kappaB-like factor in spleen cells, while Hb slightly activates it in liver cells. According to our previous study, a small amount of Hb injected to mouse is selectively taken up by liver as Hb-haptoglobin complex. These results suggest different pathways for the HO gene activation in mouse organs; one by LPS in spleen cells and the other by Hb in liver cells.
机译:血红素加氧酶(HO)-1催化血红素转化为胆绿素,铁和一氧化碳。 HO-1由许多试剂诱导,包括血红素,血红蛋白和脂多糖(LPS)。已知LPS通过NF-κB的氧化激活来激活培养的小鼠肝脏和巨噬细胞中的HO-1基因。但是,关于LPS和Hb对活生物体中HO-1基因的影响知之甚少。为了研究这一问题,我们在静脉内注射LPS和Hb后检查了小鼠肝脏,脾脏和肾脏中的HO-1及其mRNA水平。在LPS处理中,HO-1及其mRNA的量主要在小鼠脾脏中显着增加,但是在Hb处理中,HO-1及其mRNA的量仅在肝脏中略有增加。径流转录测定法支持上述结果,并且带移测定法还显示,LPS显着激活脾细胞中的NF-κB样因子,而Hb略微激活肝细胞中的它。根据我们先前的研究,少量注射入小鼠的Hb被肝脏选择性吸收为Hb-触珠蛋白复合物。这些结果提示了小鼠器官中HO基因激活的不同途径。一种是在脾细胞中通过LPS进行,另一种是在肝细胞中通过Hb进行。

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