Caspase-14 expression impairs retinal pigment epithelium barrier function: potential role in diabetic macular edema.

Caspase-14 expression impairs retinal pigment epithelium barrier function: potential role in diabetic macular edema.
复制标题

DOI:
10.1155/2014/417986
复制
发表时间:
2014
影响因子:
--
通讯作者:
Al-Shabrawey M
Al-Shabrawey M
中科院分区:
生物学3区
文献类型:
--
作者:
Beasley S;El-Sherbiny M;Megyerdi S;El-Shafey S;Choksi K;Kaddour-Djebbar I;Sheibani N;Hsu S;Al-Shabrawey M

文献摘要

参考文献

被引文献

相似文献

我们最近发现,caspase-14是视网膜中的一种新分子,可能在糖尿病视网膜病变(DR)中加速血管细胞死亡。在这里,我们评估了caspase-14是否与高血糖下视网膜色素上皮细胞(RPE)功能障碍有关。我们检测了高糖(HG, 30 mM d -葡萄糖)对人RPE (ARPE-19)细胞中caspase-14表达的影响,结果显示,与正常葡萄糖(5 mM d -葡萄糖+ 25 mM l -葡萄糖)相比,caspase-14的表达显著增加。我们还利用转染了caspase-14质粒或caspase-14 siRNA的ARPE-19细胞,评估了调节caspase-14表达对RPE细胞屏障功能、吞噬和其他caspase激活的影响。我们采用fitc -葡聚糖通量法和电细胞底物阻抗传感(ECIS)检测RPE细胞屏障功能的变化。与HG相似,caspase-14在ARPE-19细胞中的表达增加了fitc -葡聚糖通过融合单层渗漏,降低了跨细胞电阻(TER)。抑制caspase-14可阻止HG的这些影响。此外,caspase-14敲低可以阻止HG诱导的caspase-1和caspase-9的激活,caspase-1和caspase-9是HG激活的两种caspase。我们的研究结果表明,在高血糖条件下,caspase-14有助于RPE细胞屏障的破坏,从而在糖尿病性黄斑水肿的发展中发挥作用。
We recently showed that caspase-14 is a novel molecule in retina with potential role in accelerated vascular cell death during diabetic retinopathy (DR). Here, we evaluated whether caspase-14 is implicated in retinal pigment epithelial cells (RPE) dysfunction under hyperglycemia. The impact of high glucose (HG, 30 mM D-glucose) on caspase-14 expression in human RPE (ARPE-19) cells was tested, which showed significant increase in caspase-14 expression compared with normal glucose (5 mM D-glucose + 25 mM L-glucose). We also evaluated the impact of modulating caspase-14 expression on RPE cells barrier function, phagocytosis, and activation of other caspases using ARPE-19 cells transfected with caspase-14 plasmid or caspase-14 siRNA. We used FITC-dextran flux assay and electric cell substrate impedance sensing (ECIS) to test the changes in RPE cell barrier function. Similar to HG, caspase-14 expression in ARPE-19 cells increased FITC-dextran leakage through the confluent monolayer and decreased the transcellular electrical resistance (TER). These effects of HG were prevented by caspase-14 knockdown. Furthermore, caspase-14 knockdown prevented the HG-induced activation of caspase-1 and caspase-9, the only activated caspases by HG. Phagocytic activity was unaffected by caspase-14 expression. Our results suggest that caspase-14 contributes to RPE cell barrier disruption under hyperglycemic conditions and thus plays a role in the development of diabetic macular edema.
DOI: 10.3390/ijms14022334
发表时间: 2013-01-24
影响因子: 5.6
作者:
Kalimuthu S;Se-Kwon K
通讯作者: Se-Kwon K
DOI: 10.1007/s11892-011-0204-0
发表时间: 2011-08-01
影响因子: 4.2
作者:
Durham, Jennifer T.;Herman, Ira M.
通讯作者: Herman, Ira M.
DOI: 10.1167/iovs.12-10495
发表时间: 2012-12-01
影响因子: 4.4
作者:
Bhattacharya, Sujoy;Chaum, Edward;Johnson, Leonard R.
通讯作者: Johnson, Leonard R.
DOI: 10.1001/jama.290.15.2057
发表时间: 2003-10-15
影响因子: 120.7
作者:
Congdon, NG;Friedman, DS;Lietman, T
通讯作者: Lietman, T
DOI: 10.1016/j.jdermsci.2010.11.016
发表时间: 2011-02-01
影响因子: 4.6
作者:
Roelandt, Truus;Heughebaert, Carol;Hachem, Jean-Pierre
通讯作者: Hachem, Jean-Pierre