Effects of dual arterial blood supply on liver regeneration in the graft and the host following heterotopic auxiliary liver transplantation

Zhang, Junjing; Xi, Junqing; Dong, Chengbin; Meng, Xing‐Kai

doi:10.3892/etm.2014.1976

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…Hydrogen peroxide treatment depolymerizes and disorganizes MTs in human osteosarcoma 143B cells, rat pheochromocytoma PC-12 cells, AR42J pancreatic epithelial cells, and human umbilical cord vein endothelial HUVEC cells [10-13]. In addition, oxidative stress has been implicated in inducing MT disassembly in the setting of lung injury, resulting in pulmonary endothelial cell barrier dysfunction and increased inflammatory response [14].…”

Section: Introductionmentioning

confidence: 99%

Oxidative stress decreases microtubule growth and stability in ventricular myocytes

Drum

Yuan

et al. 2016

Journal of Molecular and Cellular Cardiology

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Microtubules (MTs) have many roles in ventricular myocytes, including structural stability, morphological integrity, and protein trafficking. However, despite their functional importance, dynamic MTs had never been visualized in living adult myocytes. Using adeno-associated viral vectors expressing the MT-associated protein plus end binding protein 3 (EB3) tagged with EGFP, we were able to perform live imaging and thus capture and quantify MT dynamics in ventricular myocytes in real time under physiological conditions. Super-resolution nanoscopy revealed that EB1 associated in puncta along the length of MTs in ventricular myocytes. The vast (~80%) majority of MTs grew perpendicular to T-tubules at a rate of 0.06 μm*s−1 and growth was preferentially (82%) confined to a single sarcomere. Microtubule catastrophe rate was lower near the Z-line than M-line. Hydrogen peroxide increased the rate of catastrophe of MTs ~7-fold, suggesting that oxidative stress destabilizes these structures in ventricular myocytes. We also quantified MT dynamics after myocardial infarction (MI), a pathological condition associated with increased production of reactive oxygen species (ROS). Our data indicate that the catastrophe rate of MTs increases following MI. This contributed to decreased transient outward K+ currents by decreasing the surface expression of Kv4.2 and Kv4.3 channels after MI. On the basis of these data, we conclude that, under physiological conditions, MT growth is directionally biased and that increased ROS production during MI disrupts MT dynamics, decreasing K+ channel trafficking.

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Section: Introductionmentioning

confidence: 99%