...
首页> 外文期刊>Journal of Cellular Physiology >Swelling activates chloride current and increases internal calcium in nonpigmented epithelial cells from the rabbit ciliary body.
【24h】

Swelling activates chloride current and increases internal calcium in nonpigmented epithelial cells from the rabbit ciliary body.

机译:肿胀激活氯电流和增加内部nonpigmented上皮细胞中的钙从兔子睫状体。

获取原文
获取原文并翻译 | 示例
           

摘要

Membrane current and [Ca]i in rabbit nonpigmented ciliary body epithelial cells (NPE cells) were monitored with combined patch-clamp and fura-2 measurements during cell swelling induced by anisosmotic conditions. In the presence of K-channel blockers, cell swelling produced an increase in membrane current, accompanied by an increase in [Ca]i. Structural changes in the cell, associated with membrane deformation, may be the cause of the increase in [Ca]i during swelling. The conductance activated by swelling was permeable to Cl: it was dependent on the Cl concentration gradient across the cell membrane, and it was blocked by the Cl-channel blockers DIDS, SITS, NPPB, and DIOA. Although swelling increased both Cl current and [Ca]i, there was no evidence that Ca was involved in the regulation of the Cl conductance. Cell swelling activated the current even when [Ca]i was strongly buffered at an elevated level (500 nM) or at a low level (approximately 0) with internal Ca-BAPTA/Cs-BAPTA mixtures. In addition, Cl conductance was unaffected when [Ca]i was increased with a Ca ionophore. There was also no evidence that cAMP participates in the regulation of the Cl conductance: swelling activation of the current occurred in the presence of cAMP inhibitor (Rp-cAMP-S) and cAMP mimic (Sp-cAMP-S). The data suggest independent involvement of Cl conductance and internal Ca in the regulation of cell volume in NPE cells.
机译:膜电流和兔子nonpigmented (Ca)我睫状体上皮细胞(细胞)神经性肺水肿监控结合膜片箝和fura-2测量细胞肿胀引起的anisosmotic条件。K-channel阻滞剂,细胞肿胀了增加膜电流,伴随着一个增加(Ca)我。细胞,与膜变形有关,可能的原因(Ca)我在增加肿胀。透水Cl:它依赖于Cl吗浓度梯度穿过细胞膜,它被Cl-channel阻滞剂了,坐在NPPB, DIOA。增加当前Cl和(Ca)我没有证据表明,Ca是参与监管Cl电导。目前即使我强烈缓冲(Ca)在一个高水平(500海里)或在一个较低水平(约0)与内部Ca-BAPTA / Cs-BAPTA混合物。影响(Ca)时,我与Ca增加离子载体。参与监管的Cl电导:肿胀的激活电流发生在营地抑制剂的存在(Rp-cAMP-S)和营地模仿(Sp-cAMP-S)。建议独立Cl电导的参与监管和内部Ca的细胞体积在肺水肿细胞。

著录项

相似文献

  • 外文文献
  • 中文文献
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