The relationship between intracellular free calcium and the motile responses of outer hair cells isolated from the guinea pig cochlea was examined. Calcium levels were modulated by the addition of the calcium ionophores ionomycin or A23187 to the incubation medium and monitored with the fluorescent calcium indicator fluo-3. In the presence of 1.25 mM external calcium, the application of either ...

Neutrophils release decondensed nuclear chromatin or Neutrophil Extracellular Traps (NETs) in response to a great number of physiological and pharmacological stimuli. However, apart from the host defensive function, NETs play an essential role pathogenesis various autoimmune, inflammatory, malignant diseases. Therefore, understanding molecular mechanisms formation, usually leading neutrophil de...

Calcium management differs in T and B lymphocytes. [Ca2+]i elevation in response to calcium ionophores is up to 10 times greater in T cells than B cells. There is no difference between them in ionophore uptake. T cells, but not B cells, possess a calcium-sensitive potassium channel which produces membrane hyperpolarization at [Ca2+]i above 200 nM. This alters T cell density providing a rapid an...

Nicarbazin (NCZ) is an anticoccidial drug routinely used in the poultry industry that can negatively affect reproduction by reducing egg production, egg weight, and egg hatchability. The molecular mechanisms by which NCZ affects reproduction are unknown. Lipoprotein lipase, vitellogenin, transglutaminase, and calcium are all involved in egg formation and embryogenesis. Therefore, in vitro assay...

Plasmodium chabaudi malaria parasite organelles are major elements for ion homeostasis and cellular signaling and also target for antimalarial drugs. By using confocal imaging of intraerythrocytic parasites we demonstrated that the dye acridine orange (AO) is accumulated into P. chabaudi subcellular compartments. The AO could be released from the parasite organelles by collapsing the pH gradien...

26 donor. This also distinguishes direct NO toxicity from 11,-1 toxicity. In the latter case, ionic fluxes were noted directly after the addition of the cytokine [ 151. In our experiment [CaZ+li started to increase progressively after 30 min until membrane rupture after approx. 3 h (not shown). This progressive calcium ion influx appeared to be closely associated with cell damage because nicoti...