BACKGROUND Postprandially induced oxidative stress can cause damage to mitochondrial components and initiate cellular degradative processes; which are related to obesity comorbidities. AIM OF THE STUDY This trial sought to determine whether weight loss induced by caloric restriction provides antioxidant protection to reduce the postprandial response of mitochondrial function and oxidative str...

Atrial Fibrillation is the most common sustained cardiac arrhythmia worldwide harming millions of people every year. Atrial Fibrillation (AF) abruptly induces rapid conduction between atrial myocytes which is associated with oxidative stress and abnormal calcium handling. Unfortunately this new equilibrium promotes perpetuation of the arrhythmia. Recently, in addition to being the major source ...

Fibromyalgia (FM) is a chronic pain syndrome with unknown etiology. Recent studies have shown evidence demonstrating that mitochondrial dysfunction and oxidative stress may have a role in the pathophysiology of FM. Coenzyme Q10 (CoQ10) is an essential electron carrier in the mitochondrial respiratory chain and a strong antioxidant. Low CoQ10 levels have been detected in patients with FM, and a ...

Reactive oxygen species (ROS) is generated by oxidative stress and plays an important role in various cardiac pathologies. The SIRT1 signaling pathway and mitochondrial biogenesis play essential roles in mediating the production of ROS. SIRT1 activated by resveratrol protects cardiomyocytes from oxidative stress, but the exact mechanisms by which SIRT1 prevents oxidative stress, and its relatio...

Cellular mechanisms involved in multiple neurodegenerative diseases converge on mitochondria to induce overproduction of reactive oxygen species, damage to mitochondria, and subsequent cytochrome c release. Little is currently known regarding the contribution mitochondrial dynamics play in cytochrome c release following oxidative stress in neurodegenerative disease. Here we induced oxidative st...

Oxidative stress-induced mitochondrial dysfunction and neuronal cell death have important roles in the development of neurodegenerative diseases. Dynamin related protein 1 (Drp1) is a critical factor in regulating mitochondrial dynamics. A variety of posttranslational modifications of Drp1 have been reported, including phosphorylation, ubiquitination, sumoylation and S-nitrosylation. In this st...

Insulin resistance, a critical component of type 2 diabetes (T2D), precedes and predicts T2D onset. T2D is also associated with mitochondrial dysfunction. To define the cause-effect relationship between insulin resistance and mitochondrial dysfunction, we compared mitochondrial metabolism in induced pluripotent stem cells (iPSC) from 5 healthy individuals and 4 patients with genetic insulin res...

incidence of heart failure dramatically increases with aging. An important feature of cardiac aging is an increase in susceptibility to stress, such as ischemia and hemodynamic overload [1]. The heart is an organ in which mitochondria are abundant and mitochondrial dysfunction caused by oxidative stress is believed to be an important cause of aging and failure. Mitochondrial permeability transi...

Dr. Zhang’s research focuses on the autophagy-lysosomal pathway which plays an important role in obesity and diabetes, as well as cancer, cardiovascular, pulmonary and neurodegenerative diseases. Her group developed new concepts linking mitochondrial dysfunction, autophagy and oxidative stress in cell death and survival, including the development of novel in vitro and in vivo approaches to asse...

Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative condition which is almost universally fatal. Some sufferers have an identifiable genetic mutation (<2%), but the majority of cases are sporadic (SALS). There is a body of evidence suggesting involvement of oxidative stress and mitochondrial abnormalities in the pathogenesis of ALS. Mitochondrial function was assessed in remote tissues (...