Metabolic regulation of apoptosis via Ca+/Calmodulin Kinase II (CaMKII)

نویسندگان

  • Francis McCoy
  • Laura Eckard
  • Si-lng Chen
  • Leta K Nutt
چکیده

Background The metabolic state of a cell is an important factor in whether or not it engages its apoptotic machinery. Furthermore, reprogramming energy metabolism is now recognized as a hallmark of cancer; so understanding how metabolism regulates apoptosis is crucial. Recently it has been demonstrated that CaMKII serves as a link between metabolic state and apoptosis [1]. Using the Xenopus laevis oocyte extract, it was shown that addition of glucose-6-phosphate (G6P) induced an inhibitory phosphorylation of caspase 2, mediated via CaMKII. However, the mechanisms of how G6P and metabolism regulate CaMKII still remain unclear. The aim of this study is to investigate the underlying mechanisms of how metabolism regulates CaMKII activity.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Calcium entry mediates hyperglycemia-induced apoptosis through Ca2+/calmodulin-dependent kinase ll in retinal capillary endothelial cells

PURPOSE Hyperglycemia-induced vascular cell apoptosis is a seminal early event in diabetic retinopathy. Prolonged hyperglycemia is known to increase intracellular cytosolic free calcium ([Ca(2+)]i) in retinal vascular endothelial cells (RECs), suggesting that [Ca(2+)]i is a critical trigger for microvascular degeneration. This study aims to elucidate Ca(2+)-dependent signaling mechanisms that m...

متن کامل

CaMKII in sinoatrial node physiology and dysfunction

The calcium and calmodulin-dependent protein kinase II (CaMKII) is present in sinoatrial node (SAN) pacemaker cells and is required for physiological "fight or flight" SAN beating rate responses. Inhibition of CaMKII in SAN does not affect baseline heart rate, but reduces heart rate increases in response to physiological stress. CaMKII senses intracellular calcium (Ca(2) (+)) changes, oxidation...

متن کامل

Regulation of calcium/calmodulin-dependent protein kinase II activation by intramolecular and intermolecular interactions.

As its name implies, calcium/calmodulin-dependent protein kinase II (CaMKII) is calcium dependent. In its basal state, the activity of CaMKII is extremely low. Regulation of intracellular calcium levels allows the neuron to link activity with phosphorylation by CaMKII. This review will briefly summarize our current understanding of the intramolecular mechanisms of activity regulation and their ...

متن کامل

Metabolic Regulation of Oocyte Cell Death through the CaMKII-Mediated Phosphorylation of Caspase-2

Vertebrate female reproduction is limited by the oocyte stockpiles acquired during embryonic development. These are gradually depleted over the organism's lifetime through the process of apoptosis. The timer that triggers this cell death is yet to be identified. We used the Xenopus egg/oocyte system to examine the hypothesis that nutrient stores can regulate oocyte viability. We show that pento...

متن کامل

The eag potassium channel binds and locally activates calcium/calmodulin-dependent protein kinase II.

Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) has been implicated in the regulation of neuronal excitability in many systems. Recent studies suggest that local regulation of membrane potential can have important computational consequences for neuronal function. In Drosophila, CaMKII regulates the eag potassium channel, but if and how this regulation was spatially restricted was unknown...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره 6  شماره 

صفحات  -

تاریخ انتشار 2012