Abstract

We showed previously that Ca2+ and the Ca2+-binding protein, calmodulin, can act together to displace the low molecular mass GTPase, Rab 3A from macaque brain prefrontal cortex synaptic vesicle membranes. This finding was of potential interest because synaptic vesicle-bound Rab 3A is thought to influence the Ca2+-triggered release of neurotransmitters from axonal termini. The fact that Ca2+/calmodulin can displace Rab 3A from synaptic vesicle membranes in vitro raises the possibility that Ca2+/calmodulin may have a similar effect in vivo. During the past year we explored this possibility in a collaborative study with investigators at the University of Lausanne in Switzerland. The results of the study showed that a mutant form of Rab 3 that cannot bind Ca2+/calmodulin has no effect on stimulated exocytotic events. This suggests that the complex of Rab 3 with Ca2+/calmodulin that is normally generated in response to elevated concentrations of Ca2+ may reduce the numbe r of exocy totic events that occur in response to secretory stimuli. FUNDING NIH grant RR00166 and the Howard Hughes Medical Institute.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
5P51RR000166-39
Application #
6316731
Study Section
Project Start
1976-06-01
Project End
2002-04-30
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
39
Fiscal Year
2000
Total Cost
$105,178
Indirect Cost

  Institution

Name
University of Washington
Department
Type
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195

  Publications

Pham, Amelie; Carrasco, Marisa; Kiorpes, Lynne (2018) Endogenous attention improves perception in amblyopic macaques. J Vis 18:11
Zanos, Stavros; Rembado, Irene; Chen, Daofen et al. (2018) Phase-Locked Stimulation during Cortical Beta Oscillations Produces Bidirectional Synaptic Plasticity in Awake Monkeys. Curr Biol 28:2515-2526.e4
Choi, Hannah; Pasupathy, Anitha; Shea-Brown, Eric (2018) Predictive Coding in Area V4: Dynamic Shape Discrimination under Partial Occlusion. Neural Comput 30:1209-1257
Shushruth, S; Mazurek, Mark; Shadlen, Michael N (2018) Comparison of Decision-Related Signals in Sensory and Motor Preparatory Responses of Neurons in Area LIP. J Neurosci 38:6350-6365
Raghanti, Mary Ann; Edler, Melissa K; Stephenson, Alexa R et al. (2018) A neurochemical hypothesis for the origin of hominids. Proc Natl Acad Sci U S A 115:E1108-E1116
Wool, Lauren E; Crook, Joanna D; Troy, John B et al. (2018) Nonselective Wiring Accounts for Red-Green Opponency in Midget Ganglion Cells of the Primate Retina. J Neurosci 38:1520-1540
Hasegawa, Yu; Curtis, Britni; Yutuc, Vernon et al. (2018) Microbial structure and function in infant and juvenile rhesus macaques are primarily affected by age, not vaccination status. Sci Rep 8:15867
Oleskiw, Timothy D; Nowack, Amy; Pasupathy, Anitha (2018) Joint coding of shape and blur in area V4. Nat Commun 9:466
Eberle, R; Jones-Engel, L (2017) Understanding Primate Herpesviruses. J Emerg Dis Virol 3:
McAdams, Ryan M; McPherson, Ronald J; Kapur, Raj P et al. (2017) Focal Brain Injury Associated with a Model of Severe Hypoxic-Ischemic Encephalopathy in Nonhuman Primates. Dev Neurosci 39:107-123

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