l cysteine/atrophy

The murine mutant wobbler is a model of lower motoneuron degeneration with associated skeletal muscle atrophy. This mutation most closely resembles Werdnig-Hofmann disease in humans and shares some of the clinical features of amyotrophic lateral sclerosis (ALS). It has been suggested that reactive

Age-related macular degeneration (AMD) involves the loss of retinal pigment epithelium (RPE) and photoreceptors and is one of the leading causes of blindness in the elderly. Oxidative damage to proteins, lipids, and DNA has been associated with RPE dysfunction and AMD. In this study, we evaluated

Antioxidant defenses play a critical role in the regulation of programmed cell death, even when death is induced by nonoxidative stimuli. During spermatogenesis, most of the testicular germ cells degenerate by an apoptotic process that is under hormonal control. However, the exact mechanisms by

Methylmercury (MeHg) is related to several deleterious effects on the vertebrate nervous system and part of these effects are through interaction with sulfhydryl (-SH) group found in cellular proteins. We decided to characterize the dose-dependent effect of MeHg on the neurotoxicity and the neurite

Groups of 25 female F344 rats and 25 female B6C3F1 mice were exposed to 0, 30, 300, 600, or 1200 ppm tetrafluoroethylene (TFE) by inhalation for up to 12 days. Another set of 25 female rats and 25 female mice of the same strains were given 0, 5, 20, or 50 mg/kg of

Aberrant oxidative pathways of catecholamine neurotransmitters, i.e. dopamine and norepinephrine, are an important biochemical correlate of catecholaminergic neuron loss in some disabling neurodegenerative diseases of the elderly, notably Parkinson's disease. In an oxidative stress setting, under

The noradrenergic neurotransmitter (-)-norepinephrine (1) is very easily oxidized at physiological pH to an o-quinone (2) that normally cyclizes and subsequently oxidatively polymerizes to black melanin. In this investigation it is demonstrated that L-cysteine (CySH) can divert the melanin pathway

A single subcutaneous injection of L-cysteine (1.2 mg/g body weight) to rats 4 days after birth was followed by atrophy of the brain which was well developed 27--32 days after the injection. It was apparent that the lesioned animals could be divided into two groups (type 1 and 2) on account of the

The effect of subchronic exposure of S-(1,2-dichlorovinyl)-L-cysteine (DCVC), an active metabolite of trichloroethylene (TCE), was investigated in mice, as a part of mechanistic assessment of renal toxicity of TCE. To examine the subchronic effects of DCVC on kidney function, Balb/c male mice were

A single subcutaneous injection of L-cysteine (1.2 mg/g body wt.) to 4-day-old rats leads to atrophy of the brains examined 27-31 days later. The brains could be separated into two groups (type 1 and 2) on account of the degree of atrophy. Type-1 lesion, with a brain weight reduction of 20%, was

S-(trans-1,2-Dichlorovinyl)-L-cysteine (DCVC) exposure causes acute renal tubular cytotoxicity. To further characterize the effects of DCVC, a chronic study was undertaken. Male Swiss-Webster mice received DCVC dissolved in their drinking water at 0.01, 0.05 and 0.1 mg ml-1. At 4, 8, 21 and 37

Histopathologically, sperm granulomas consist of a central mass of degenerating spermatozoa surrounded by many epithelioid macrophages and lymphocytes. Using monoclonal antibodies (ED1, ED2, and OX6), the authors investigated immunohistochemically the participation of different macrophage

The initial step in the genesis of neuromelanin, a black polymeric pigment normally found in the cytoplasm of dopaminergic cell bodies in the substantia nigra (SN), is the autoxidation of dopamine (DA) to DA-o-quinone (1). In this investigation, it is demonstrated that in the presence of L-cysteine