Nutrient availability links mitochondria, apoptosis, and obesity
نویسندگان
چکیده
Mitochondria are the dominant source of the cellular energy requirements through oxidative phosphorylation, but they are also central players in apoptosis. Nutrient availability may have been the main evolutionary driving force behind these opposite mitochondrial functions: production of energy to sustain life and release of apoptotic proteins to trigger cell death. Here, we explore the link between nutrients, mitochondria and apoptosis with known and potential implications for age-related decline and metabolic syndromes.
منابع مشابه
Minireview: nutrient sensing and the regulation of insulin action and energy balance.
Obesity is the result of an imbalance between energy intake and energy expenditure. Under most circumstances, the increased availability of nutrients is tightly coupled with nutrient-sensing mechanisms that in turn activate appropriate behavioral and metabolic responses. The latter responses include decreases in food intake and the production of endogenous nutrients and increased expenditure of...
متن کاملNutrient-sensing hypothalamic TXNIP links nutrient excess to energy imbalance in mice.
Nutrient excess in obesity and diabetes is emerging as a common putative cause for multiple deleterious effects across diverse cell types, responsible for a variety of metabolic dysfunctions. The hypothalamus is acknowledged as an important regulator of whole-body energy homeostasis, through both detection of nutrient availability and coordination of effectors that determine nutrient intake and...
متن کاملA Cellular Response to an Internal Energy Crisis
Lack of an appropriate energy supply has been thought to induce cell death in a nonspecific manner by causing a decline in metabolism and a gradual cessation of cellular function. In this issue of Cell, Nutt et al. (2005) describe a new mechanism that directly links nutrient availability to apoptosis in Xenopus oocytes and show that age-dependent changes in the nutritional state of a cell might...
متن کاملSchizophrenia Induces Oxidative Stress and Cytochrome C Release in Isolated Rat Brain Mitochondria: a Possible Pathway for Induction of Apoptosis and Neurodegeneration
Schizophrenia is a chronic and often debilitating illness which affects about 1% of the world population. Some reagents have been used to simulate schizophrenic disorders in laboratory animals, such as amphetamine and ketamine. Previous studies have suggested that reactive oxygen species (ROS) production, reduced levels of ATP, mitochondrial dysfunction and apoptosis are involved in the pathoph...
متن کاملSchizophrenia Induces Oxidative Stress and Cytochrome C Release in Isolated Rat Brain Mitochondria: a Possible Pathway for Induction of Apoptosis and Neurodegeneration
Schizophrenia is a chronic and often debilitating illness which affects about 1% of the world population. Some reagents have been used to simulate schizophrenic disorders in laboratory animals, such as amphetamine and ketamine. Previous studies have suggested that reactive oxygen species (ROS) production, reduced levels of ATP, mitochondrial dysfunction and apoptosis are involved in the pathoph...
متن کامل