H2O2Enhances Ca2+Release from Osteoblast Internal Stores
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چکیده
منابع مشابه
Calcium from internal stores modifies dendritic spine shape.
S ince their discovery at the turn of the century by Ramon y Cajal (1), dendritic spines have fascinated scientists by their unusual structure and by their likely role in cognitive functions such as learning and memory. Spines are protrusions from dendrites having diverse shapes that range more than 100-fold in size. Larger spines have proportionately larger synapses and more diversity in subce...
متن کاملCalcium from internal stores triggers GABA release from retinal amacrine cells.
The Ca(2+) that promotes transmitter release is generally thought to enter presynaptic terminals through voltage-gated Ca(2+)channels. Using electrophysiology and Ca(2+) imaging, we show that, in amacrine cell dendrites, at least some of the Ca(2+) that triggers transmitter release comes from endoplasmic reticulum Ca(2+) stores. We show that both inositol 1,4,5-trisphosphate receptors (IP(3)Rs)...
متن کاملSynaptic transmission mediated by internal calcium stores in rod photoreceptors.
Retinal rod photoreceptors are depolarized in darkness to approximately -40 mV, a state in which they maintain sustained glutamate release despite low levels of calcium channel activation. Blocking voltage-gated calcium channels or ryanodine receptors (RyRs) at the rod presynaptic terminal suppressed synaptic communication to bipolar cells. Spontaneous synaptic events were also inhibited when e...
متن کاملSubpopulations of rat vascular smooth muscle cells as discriminated by calcium release mechanisms from internal stores.
Transsarcolemmal influx and release from the sarcoplasmic reticulum (SR) through specific Ca2+ channels are the two main pathways to elevate cytosolic Ca2+ (Ca2+i) in vascular smooth muscle cells (VSMCs). To elucidate intercellular distribution and function of the Ca2+ channel in SR in cultured VSMCs, we observed Ca2+i transients by digital two-dimensional imaging with a fluorescent Ca2+ indica...
متن کاملCa-induced Ca Release from Internal Stores in INS-1 Rat Insulinoma Cells.
The secretion of insulin from pancreatic β-cells is triggered by the influx of Ca(2+) through voltage-dependent Ca(2+) channels. The resulting elevation of intracellular calcium ([Ca(2+)](i)) triggers additional Ca(2+) release from internal stores. Less well understood are the mechanisms involved in Ca(2+) mobilization from internal stores after activation of Ca(2+) influx. The mobilization pro...
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ژورنال
عنوان ژورنال: Yonsei Medical Journal
سال: 2002
ISSN: 0513-5796
DOI: 10.3349/ymj.2002.43.2.229