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PMID:28370453
| Citation |
Dai, Z, Tang, X, Chen, J, Tang, X and Wang, X (2017) Rab3A Inhibition of Ca -Dependent Dopamine Release From PC12 Cells Involves Interaction With Synaptotagmin I. J. Cell. Biochem. 118:3696-3705 |
|---|---|
| Abstract |
Rab3 and synaptotagmin have been suggested to play important roles in the regulation of neurotransmitter release and, however, the molecular mechanism has not been completely clear. Here, we studied the effects of Rab3A and synaptotagmin I (Syt I) on dopamine release using PC12 cells as a model system. Rab3A was demonstrated to have effects on both Ca -independent and Ca -dependent dopamine releases from the PC12 cells. Application of Rab3A (up to 2500 nM) gradually decreased the amount of Ca -dependently released dopamine, indicating that Rab3A is a negative modulator that was further supported by the increase in dopamine release caused by Rab3A knockdown. Syt I knockdown weakened the Ca -dependent dopamine release, suggesting that Syt I plays a positive regulatory role in the cellular process. Treatment of the Syt I-knocked down PC12 cells with Rab3A further decreased Ca -dependent dopamine release and, however, the decrease magnitude was significantly reduced compared with that before Syt I knockdown, thus for the first time demonstrating that the inhibitory effect of Rab3A on Ca -dependent dopamine release involves the interaction with Syt I. This work has shed new light on the molecular mechanism for Rab3 and synaptotamin regulation of neurotransmitter release. J. Cell. Biochem. 118: 3696-3705, 2017. © 2017 Wiley Periodicals, Inc. |
| Links |
PubMed Online version:10.1002/jcb.26016 |
| Keywords |
Animals; Calcium/metabolism; Dopamine/secretion; Gene Knockdown Techniques; Neurotransmitter Agents/secretion; PC12 Cells; Rats; Synaptotagmin I/genetics; Synaptotagmin I/metabolism; rab3A GTP-Binding Protein/antagonists & inhibitors; rab3A GTP-Binding Protein/genetics; rab3A GTP-Binding Protein/metabolism |
Significance
Annotations
| Gene product | Qualifier | GO Term | Evidence Code | with/from | Aspect | Extension | Notes | Status |
|---|---|---|---|---|---|---|---|---|
| GO:0014059: regulation of dopamine secretion |
ECO:0000314: |
P |
Figure 2A and 2c show that there are concentration dependent effects of RAB3a on Dopamine release in culture medium. The RAB3a was taken from rats. |
complete | ||||
| GO:0033603: dopamine secretion |
ECO:0000315: |
P |
Figure 4c shows that in the absence of RAB3a the dopamine content was significantly lower after the SYT1 knockdown when compared to figure 2c - without the SYT 1 knockdown. The proteins are taken from rats. |
complete | ||||
Notes
See also
References
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