Abstract:
:A model explaining quantal Ca2+ release as an intrinsic property of the inositol 1,4,5-triphosphate (IP3) receptor has been put forward. The model is based on the hypothesis that the IP3 receptor can catalyze a transformation of the IP3 molecule differing from its conventional metabolism. A simple kinetic mechanism is considered, in which IP3-induced Ca2+ channel opening is followed by the step of IP3 conversion and channel closure. Examination of the resulting mathematical model shows that it can reproduce well both partial release of stored Ca2+ and the same responsiveness to subsequent IP3 additions. On incorporation of an additional closed state of the channel, the model describes also a time-dependent channel inactivation at a high IP3 dose. Temperature sensitivity of the catalytic step accounts for the reported elimination of quantal responses and inactivation at low temperature. The transformation product is surmised to be a positional or stereo isomer of IP3.
journal_name
Biosci Repjournal_title
Bioscience reportsauthors
Kaimachnikov NP,Nazarenko VGdoi
10.1007/BF01207265subject
Has Abstractpub_date
1996-10-01 00:00:00pages
405-13issue
5eissn
0144-8463issn
1573-4935journal_volume
16pub_type
杂志文章abstract::Conflicting opinions were recently expressed concerning the possible effect of alpha 2-adrenergic agonists upon cyclic AMP production in pancreatic islets. In the present study, clonidine inhibited glucose-induced insulin release from rat pancreatic islets, this inhibitory effect being abolished by idazoxan. Clonidine...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01122227
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journal_title:Bioscience reports
pub_type: 杂志文章
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journal_title:Bioscience reports
pub_type: 杂志文章
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journal_title:Bioscience reports
pub_type: 杂志文章
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journal_title:Bioscience reports
pub_type: 杂志文章
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pub_type: 杂志文章,meta分析
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01182482
更新日期:1991-06-01 00:00:00
abstract::Radioactivity from [14C] adenosine was linearly incorporated into tissue nucleotides in perfused rat hearts. All the TCA-extractable 14C was confined to the purine nucleoside phosphates for up to 1 h of perfusion. Radioactivity was also incorporated linearly into the TCA-insoluble fraction, which by 40 min accounted f...
journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:1981-11-01 00:00:00
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更新日期:2015-04-16 00:00:00
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pub_type: 杂志文章
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更新日期:2020-01-31 00:00:00
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pub_type: 临床试验,杂志文章
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:2019-04-09 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:2018-02-02 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:1982-10-01 00:00:00
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doi:10.1042/BSR20192940
更新日期:2019-11-29 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01116242
更新日期:1986-10-01 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20200858
更新日期:2020-08-28 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:1985-07-01 00:00:00
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journal_title:Bioscience reports
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20181640
更新日期:2019-05-07 00:00:00
abstract::Poly(A)+RNA was isolated from brown adipose tissue of cold acclimated rats and a fraction enriched for uncoupling protein mRNA was used to generate a cDNA library in pBR 322. Immunological screening of 1,500 colonies with an affinity-purified antiserum against the uncoupling protein yielded five positive clones, pUCPr...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01145183
更新日期:1986-01-01 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:2003-04-01 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
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更新日期:1982-04-01 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01117331
更新日期:1988-12-01 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20193094
更新日期:2019-12-20 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20181794
更新日期:2019-07-25 00:00:00
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journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01119901
更新日期:1985-10-01 00:00:00