Mutations in superoxide dismutase cause a subset of familial amyotrophic lateral sclerosis and provoke progressive paralysis when expressed in mice. After retrograde transport to the spinal cord following injection into muscles, an adeno-associated virus carrying a gene that encodes a small interfering RNA was shown to target superoxide dismutase messenger RNA for degradation. The corresponding...

Superoxide dismutase (SOD) plays an important role in detoxication of the organism. Its function is to protect the organism against the cytotoxic action of free radicals. The highest expression of superoxide dismutase was observed in the hepatocytes adjacent to the hydatid cyst. The expression of this gene in the hepatocytes of infected livers 5 cm apart from the infection site was slightly lower.

A further characterization of human extracellular superoxide dismutase is reported. The study was especially aimed at the interaction with substances known to interfere with CuZn superoxide dismutase and other superoxide dismutases. Extracellular superoxide dismutase is efficiently inhibited by cyanide and is about 3 times more sensitive than is human CuZn superoxide dismutase. The sensitivity ...

The amount of Mn superoxide dismutase (MnSOD) and the activity of Cu,Zn-superoxide dismutase (CuZnSOD) have been studied in human fibroblasts of five subjects with trisomy 21 and five subjects with normal karyotype, using nuclear magnetic relaxation and polarographic methods. In the trisomic fibroblasts we have found a mean molar amount of MnSOD 25.4% lower than in the control, and an amount of...

background: amyotrophic lateral sclerosis (als) is the most common motor neuron disorder in european populations. als can be sporadic als (sals) or familial als (fals). among 20 known als genes, mutations in c9orf72 and superoxide dismutase 1 (sod1) are the most common genetic causes of the disease. whereas c9orf72 mutations are more common in western populations, the contribution of sod1 to al...

BACKGROUND AND PURPOSE It has been postulated that oxygen-derived free radicals are produced in significant quantities upon reperfusion of ischemic brain and that the free radicals play a pivotal role in triggering the ischemic neuronal damage causing delayed neuronal death. This study was undertaken to examine the effects of human recombinant superoxide dismutase on the delayed neuronal death ...

Superoxide radicals are produced in trace amounts by the mitochondrial respiratory chain. Most are removed rapidly by superoxide dismutase in the matrix. Superoxide is also known to react with glutathione. Reported values of the rate constant for this reaction range from 10(2) to in excess of 10(5) M(-1).s(-1). The magnitude of this rate constant has important physiological implications because...