The role of the Na(+)/H(+) exchanger in ischemia, reperfusion, and preconditioning was investigated in isolated perfused rat hearts. Contractile function, [Na(+)](i), and pH(i) were measured; ischemic damage was assessed by the recovery of developed pressure (DP) on reperfusion. After 30 minutes of ischemia, DP recovered to only 14+/-4% of preischemic control. In contrast, after preconditioning...

Dystrophic epidermolysis bullosa pruriginosa (DEB-Pr) is a rare subtype of dystrophic epidermolysis bullosa (DEB). This disease is characterized by severe itching, lichenoid nodules or prurigo-like lesions, and linear scarring with a predilection for the extensor limbs. Pathogenic mutations in the type VII collagen alpha 1 (COL7A1) gene have been identified. We analyzed mutations in the COL7A1 ...

The role of Na+ in the regulation of cell growth was examined in quiescent, high-density cultures of kidney epithelial cells of the BSC-1 line. The addition of NaCl to the medium increased the number of cells initiating DNA synthesis in a concentration-dependent manner after serum stimulation. In the presence of added NaCl, cells in confluent cultures grew to high density at an increased rate, ...

background: garcinia kola seed is consumed indiscriminately in nigeria without recourse to its potential toxicity. therefore, this study was aimed at assessing the toxicity of the aqueous extract of g. kola seeds on selected tissues of male rats.  methods: thirty male rats (215.00 ± 18.58 g) were assigned into four groups: a, b, c and d which received 0.5 ml of distilled water, 25, 50 and 100 m...

Duchenne muscular dystrophy (DMD) is a hereditary degenerative disease manifested by the absence of dystrophin, a structural, cytoskeletal protein, leading to muscle degeneration and early death through respiratory and cardiac muscle failure. Whereas the rise of cytosolic Ca(2+) concentrations in muscles of mdx mouse, an animal model of DMD, has been extensively documented, little is known abou...

In this study, the alterations in serum biochemical parameters of patients with lung cancer exposed to radiotherapy was investigated. For this aim, the levels of serum gamma glutamyltransferase (GGT), aspartate aminotransferase (AST), alanine aminotransferase (ALT), albumin (ALB), bilurubin (BLB), copper (Cu), sodium (Na) and potassium (K) were evaluated before and after radiotherapy. Serum enz...

Analysis of membrane currents recorded from hormone-deprived H441 cells showed that the membrane potential (V(m)) in single cells (approximately -80 mV) was unaffected by lowering [Na+]o or [Cl(-)]o, indicating that cellular Na+ and Cl(-) conductances (GNa and GCl, respectively) are negligible. Although insulin (20 nM, approximately 24 h) and dexamethasone (0.2 microM, approximately 24 h) both ...

Research on recruitment variability has gained momentum in the last years, undoubtedly due to many unknowns related climate change impacts. Knowledge about recruitment—the process of small, young fish transitioning an older, larger life stage—timing and success is especially important for commercial species, as it allows predicting availability adapting fishing practices its sustainable exploit...

Two metabolism trials were conducted to determine the effect of altering dietary Na and K on Mg availability. Three dietary treatments (normal K-normal Na, high K-normal Na and high K-high Na) were imposed upon nine crossbred wether lambs in a randomized block design. Each trial consisted of a 5-d diet adjustment, a 10-d preliminary period and a 5-d collection of feed, feces and urine. Increasi...

introduction: an induction of osteogenic differentiation in rat bone marrow stromal cell cultures by dexamethasone was reported. materials and methods: the marrow stromal cells obtained from 4 to 6 weeks - old spruge-dawely male rats were grown in primary culture for 7 days and then subcultured for 20 days. the cells were cultured in either dmem medium containing 15% fetal calf serum, antibioti...