Oxidative stress due to free radicals is involved in the pathogenesis of many chronic disorders including cancer, inflammation and neurological diseases. Reactive oxygen species (ROS) may be implicated in age-related macular degeneration (AMD).This study investigated the expression of manganese superoxide dismutase MnSOD on mRNA and protein level. Moreover it examines the genetic sequence polym...

Chronic intermittent hypoxia (CIH) is associated with increased production of reactive oxygen species that contributes to the adaptive mechanism underlying the improved myocardial ischemic tolerance. The aim was to find out whether the antioxidative enzyme manganese superoxide dismutase (MnSOD) can play a role in CIH-induced cardioprotection. Adult male Wistar rats were exposed to intermittent ...

The filamentous cyanobacterium Anabaena PCC 7120 (now renamed Nostoc PCC 7120) possesses two genes for superoxide dismutase (SOD). One is an iron-containing (FeSOD) whereas the other is a manganese-containing superoxide dismutase (MnSOD). Localization experiments and analysis of the sequence showed that the FeSOD is cytosolic, whereas the MnSOD is a membrane-bound homodimeric protein containing...

Elevated mitochondrial reactive oxygen species have been suggested to play a causative role in some forms of muscle insulin resistance. However, the extent of their involvement in the development of diet-induced insulin resistance remains unclear. To investigate, manganese superoxide dismutase (MnSOD), a key mitochondrial-specific enzyme with antioxidant modality, was overexpressed, and the eff...

Loss of function of the tumor suppressor protein p53 represents a very frequent event in human carcinogenesis, but the molecular mechanisms linking impaired p53 activity to increased cell malignancy are still incompletely understood. p53 is normally involved in both cell cycle control and the induction of cell death and is involved in the latter mainly through the transcriptional regulation of ...

Eukaryotic gene expression is a complex process that can be controlled at the level of transcription, post-transcription or translation and post-translation. In recent years, there has been a growing interest in understanding the role of 3'-untranslated region (UTR) in regulating mRNA turnover and translation. The 3'-UTR harbors the poly(A) signal and post-transcriptional regulatory sequences, ...

BACKGROUND The manganese superoxide dismutase (MnSOD) gene encodes an antioxidant enzyme (SOD2) that may protect cells from oxidative damage. The MnSOD allele with Val as amino acid 16 encodes a protein that has 30-40% lower activity compared with the MnSOD Ala variant, hence possibly increasing susceptibility to oxidative stress. On the other hand, some epidemiologic studies suggest that the A...

Amputation as a result of impaired wound healing is a serious complication of diabetes. Inadequate angiogenesis contributes to poor wound healing in diabetic patients. Endothelial progenitor cells (EPCs) normally augment angiogenesis and wound repair but are functionally impaired in diabetics. Here we report that decreased expression of manganese superoxide dismutase (MnSOD) in EPCs contributes...

Superoxide is widely regarded as the primary reactive oxygen species (ROS) which initiates downstream oxidative stress. Increased oxidative stress contributes, in part, to many disease conditions such as cancer, atherosclerosis, ischemia/reperfusion, diabetes, aging, and neurodegeneration. Manganese superoxide dismutase (MnSOD) catalyzes the dismutation of superoxide into hydrogen peroxide whic...

BACKGROUND Oxidative stress is thought to play an important role in age-induced atherogenesis. Manganese superoxide dismutase (MnSOD) is an antioxidant enzyme that is localized in mitochondria and protects macrophages against apoptosis induced by oxidized low density lipoprotein (oxLDL). We previously reported that genetic polymorphism of MnSOD modifies mitochondrial MnSOD (mtMnSOD) activity an...