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Characterization of mouse salivary polypeptide secretion after oral administration of pilocarpine RChHN
LÓPEZ-SOLÍS,REMIGIO; PUENTE,MARGARITA; DURÁN,VIVIANA; MORALES-BOZO,IRENE; KEMMERLING,ULRIKE; PARDO,RODRIGO; WENK,CAROLINA.
Mouse salivary secretion provoked by single or multiple oral administrations of the cholinergic agent pilocarpine was characterized. An accessory ad hoc device, manipulated by a single operator, was used to collect saliva from various mice simultaneously. A single challenge by pilocarpine in the range 40-400 µg provoked a dose-dependent secretory response. The secretory response lasted for about 40 minutes and was constituted by four clearly defined stages, namely: lag (5-10 min), maximal flow (10 min), slowering (15-20 min) and postsecretory rest. In this response, usual parameters were: maximal flow rate, 30-40 µl/min; total volume of saliva, 250-350 µl/mouse and total salivary protein, about 700 µg/mouse. Temporal desensitization of the secretory...
Tipo: Journal article Palavras-chave: Mouse; Saliva; Secretion; Pilocarpine; Polypeptides.
Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000000023
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Signal transduction and gene expression regulated by calcium release from internal stores in excitable cells Biol. Res.
CARRASCO,MARÍA ANGÉLICA; JAIMOVICH,ENRIQUE; KEMMERLING,ULRIKE; HIDALGO,CECILIA.
Calcium regulation of several transcription factors involves different calcium-dependent signaling cascades and engages cytoplasmic as well as nuclear calcium signals. The study of the specific sources of calcium signals involved in regulation of gene expression in skeletal muscle has been addressed only recently. In this tissue, most cytoplasmic and nuclear calcium signals originate from calcium release from internal stores, mediated either by ryanodine receptor (RyR) or IP3 receptor (IP3R) channels. The latter are located both in the sarcoplasmic reticulum (SR) and in the nuclear membrane, and their activation results in long-lasting nuclear calcium increase. The calcium signals mediated by RyR and IP3R are very different in kinetics, amplitude and...
Tipo: Journal article Palavras-chave: Calcium signals; Intracellular stores; Transcription; Oxidation; Neurons; Skeletal muscle.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000400028
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