...
首页> 外文期刊>Journal of biochemical and molecular toxicology >Ricin-induced toxicity in the macrophage J744A.1 cells: the role of TNF-alpha and the modulation effects of TNF-alpha polyclonal antibody.
【24h】

Ricin-induced toxicity in the macrophage J744A.1 cells: the role of TNF-alpha and the modulation effects of TNF-alpha polyclonal antibody.

机译:巨噬细胞J744A.1细胞中的蓖麻毒性:TNF-α的作用和TNF-α多克隆抗体的调节效果。

获取原文
获取原文并翻译 | 示例
           

摘要

Ricin is a natural toxin of the castor beans (Ricinus communus). We studied the time- and concentration-dependent effects of ricin on the release of TNF-alpha and lactate dehydrogenase (LDH), as well as the modulation of the ricin-induced effects by TNF-alpha antibody in the J774A.1 cells. When added at concentrations ranging from 0 to 1000 ng/mL, ricin caused concentration-dependent increases in the release of TNF-alpha after incubation for 12 to 24 hours. Concentration-dependent increases in the leakage of LDH were also observed after incubation of the cells with those concentrations of ricin for 24 to 48 hours. Addition of 5 units/mL of rabbit anti-mouse TNF-alpha polyclonal antibody (TNF-alpha antibody) 2 hours prior to the addition of ricin resulted in a decrease in the ricin-induced toxicity, indicated by the release of LDH by the cells. However, when added at concentrations higher than 5 units/mL, the antibody resulted in either no effect or an increase in the ricin-induced LDH leakage. These results suggest that secretion of TNF-alpha by the macrophages in response to ricin plays a significant role in the toxicity of ricin and that TNF-alpha antibody can antagonize the effects of ricin in this cell line when added at relatively low concentrations.
机译:蓖麻植物是蓖麻籽(Ricinus Communus)的天然毒素。我们研究了蓖麻植物蓖麻植物对TNF-α和乳酸脱氢酶(LDH)的释放的时间和浓度依赖性作用,以及J774A.1细胞中TNF-α抗体的蓖麻诱导的效果的调节。当在0至1000ng / ml的浓度下添加时,蓖麻素导致浓度依赖性依赖于孵育后释放TNF-α在孵育12至24小时后。在将细胞孵育在细胞24至48小时的浓度下,还观察到LDH泄漏中的浓度依赖性增加。在加入蓖麻油之前2小时加入5个单位/ mL兔抗小鼠TNF-α多克隆抗体(TNF-α抗体)导致蓖麻毒素引起的毒性降低,通过细胞释放LDH 。然而,当以高于5个单位/ mL的浓度添加时,抗体导致无效应或增加蓖麻诱导的LDH泄漏。这些结果表明,巨噬细胞响应蓖麻植物的TNF-α分泌在蓖麻毒素的毒性中发挥着重要作用,并且TNF-α抗体可以在相对低浓度下添加时对该细胞系中的蓖麻植物的影响拮抗。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号