A mathematical model of the mitochondrial NADH shuttles and anaplerosis in the pancreatic -cell

نویسندگان

  • Pål O. Westermark
  • Jeanette Hellgren Kotaleski
  • Anneli Björklund
  • Valdemar Grill
  • Anders Lansner
چکیده

Pål O. Westermark, Jeanette Hellgren Kotaleski, Anneli Björklund, Valdemar Grill, and Anders Lansner Parallel Scientific Computing Institute/Computational Biology and Neurocomputing, Computer Science and Communication, Royal Institute of Technology, Stockholm, Sweden; Institute for Theoretical Biology, Humboldt University Berlin, Berlin, Germany; Department of Molecular Medicine, Endocrine and Diabetes Unit, Karolinska Institute and Hospital, Stockholm, Sweden; and Institute of Cancer Research and Molecular Medicine, Medical Faculty, Norwegian University of Science and Technology, Trondheim, Norway

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

A mathematical model of the mitochondrial NADH shuttles and anaplerosis in the pancreatic beta-cell.

The pancreatic beta-cells respond to an increased glycolytic flux by secreting insulin. The signal propagation goes via mitochondrial metabolism, which relays the signal to different routes. One route is an increased ATP production that, via ATP-sensitive K(+) (K(ATP)) channels, modulates the cell membrane potential to allow calcium influx, which triggers insulin secretion. There is also at lea...

متن کامل

Insulin release, peripheral insulin resistance and muscle function in protein malnutrition: a role of tricarboxylic acid cycle anaplerosis.

Pancreatic beta-cells and skeletal muscle act in a synergic way in the control of systemic glucose homeostasis. Several pyruvate-dependent and -independent shuttles enhance tricarboxylic acid cycle intermediate (TACI) anaplerosis and increase beta-cell ATP:ADP ratio, triggering insulin exocytotic mechanisms. In addition, mitochondrial TACI cataplerosis gives rise to the so-called metabolic coup...

متن کامل

Aralar plays a significant role in maintaining the survival and mitochondrial membrane potential of BV2 microglia.

NADH shuttles mediate the transfer of the reducing equivalents of cytosolic NADH into mitochondria. Increasing evidence has suggested that malate-aspartate shuttle (MAS), one of the two types of NADH shuttles, plays important roles in certain biological processes. Aralar/AGC1, a Ca(2+)-dependent aspartate-glutamate carrier on mitochondrial membrane, is a component of MAS. It has been reported t...

متن کامل

Role of NADH Shuttles in Glucose-Induced Insulin Secretion From Fetal -Cells

The NADH shuttle system, which transports the substrate for oxidative metabolism directly from the cytosol to the mitochondrial electron transport chain, has been shown to be essential for glucose-induced activation of mitochondrial metabolism and insulin secretion in adult -cells. We examined the role of these shuttles in the fetal -cell, which is immature in being unable to secrete insulin in...

متن کامل

Enhanced mitochondrial glutamine anaplerosis suppresses pancreatic cancer growth through autophagy inhibition

Cancer cells use precursors derived from tricarboxylic acid (TCA) cycle to support their unlimited growth. However, continuous export of TCA cycle intermediates results in the defect of mitochondrial integrity. Mitochondria glutamine metabolism plays an essential role for the maintenance of mitochondrial functions and its biosynthetic roles by refilling the mitochondrial carbon pool. Here we re...

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   شماره 

صفحات  -

تاریخ انتشار 2007