Regulation of Quantal Size by Presynaptic Mechanisms
Regulation of Quantal Size by Presynaptic Mechanisms
复制标题
突触前机制对量子大小的调节
DOI:
10.1515/revneuro.2000.11.2-3.159
复制
发表时间:
2000
影响因子:
4.1
通讯作者:
E. Pothos
中科院分区:
文献类型:
--
作者:
D. Sulzer;E. Pothos
Quantal size is often modeled as invariant, although it is now well established that the number of transmitter molecules released per synaptic vesicle during exocytosis can be modulated in central and peripheral synapses. In this review, we suggest why presynaptically altered quantal size would be important at social synapses that provide extrasynaptic neurotransmitter. Current techniques used to measure quantal size are reviewed with particular attention to amperometry, the first approach to provide direct measurement of the number of molecules and kinetics of presynaptic quantal release, and to CNS dopamine neuronal terminals. The known interventions that alter quantal size at the presynaptic locus are reviewed and categorized as (1) alteration of transvesicular free energy gradients, (2) modulation of vesicle transmitter transporter activity, (3) modulation of fusion pore kinetics, (4) altered transmitter degranulation, and (5) changes in synaptic vesicle volume. Modulation of the number of molecules released per quantum underlies mechanisms of drug action of L-DOPA and the amphetamines, and seems likely to be involved in both normal synaptic modification and disease states. Statistical analysis for examining quantal size and data presentation is discussed. We include detailed information on performing nonparametric resampling statistical analysis, the Kolmogorov-Smirnov test for two populations, and random walk simulations using spreadsheet programs.
登录
查看更多内容
DOI:
10.1016/s1040-7952(06)80020-0
发表时间:
1994
期刊:
Advances in second messenger and phosphoprotein research
影响因子:
--
作者:
Bekkers,JM;Stevens,CF
通讯作者:
Stevens,CF
影响因子:
4.8
作者:
Tamir,H;Piscopo,I;Liu,KP;Hsiung,SC;Adlersberg,M;Nicolaides,M;al-Awqati,Q;Nunez,EA;Gershon,MD
通讯作者:
Gershon,MD
DOI:
10.1002/neu.480180507
发表时间:
1987
期刊:
Journal of neurobiology
影响因子:
--
作者:
Sulzer,D;Piscopo,I;Ungar,F;Holtzman,E
通讯作者:
Holtzman,E
影响因子:
3.4
作者:
OBERHAUSER, AF;MONCK, JR;FERNANDEZ, JM
通讯作者:
FERNANDEZ, JM
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Maron,R;Stern,Y;Kanner,BI;Schuldiner,S
通讯作者:
Schuldiner,S