Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity
Dopamine (DA) modulates glutamatergic synaptic transmission and its plasticity in the striatum; however it is not well known how DA modulates long-term plasticity of striatal GABAergic inhibitory synapses. This work focused on the analysis of both dopaminergic modulation of inhibitory synapses and t...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Neural Plasticity |
| Online Access: | http://dx.doi.org/10.1155/2015/789502 |
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| author | Elizabeth Nieto Mendoza Elizabeth Hernández Echeagaray |
| author_facet | Elizabeth Nieto Mendoza Elizabeth Hernández Echeagaray |
| author_sort | Elizabeth Nieto Mendoza |
| collection | DOAJ |
| description | Dopamine (DA) modulates glutamatergic synaptic transmission and its plasticity in the striatum; however it is not well known how DA modulates long-term plasticity of striatal GABAergic inhibitory synapses. This work focused on the analysis of both dopaminergic modulation of inhibitory synapses and the synaptic plasticity established between GABAergic afferents to medium spiny neurons (MSNs). Our results showed that low and high DA concentrations mainly reduced the amplitude of inhibitory synaptic response; however detailed analysis of the D1 and D2 participation in this modulation displayed a wide variability in synaptic response. Analyzing DA participation in striatal GABAergic plasticity we observed that high frequency stimulation (HFS) of GABAergic interneurons in the presence of DA at a low concentration (200 nM) favored the expression of inhibitory striatal LTD, whereas higher concentration of DA (20 μM) primarily induced LTP. Interestingly, the plasticity induced in an animal model of striatal degeneration mimicked that induced in the presence of DA at a high concentration, which was not abolished with D2 antagonist but was prevented by PKA blocker. |
| format | Article |
| id | doaj-art-766717ac7d0947d194f33cdd23769ecf |
| institution | Kabale University |
| issn | 2090-5904 1687-5443 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Neural Plasticity |
| spelling | doaj-art-766717ac7d0947d194f33cdd23769ecf2025-02-03T01:22:28ZengWileyNeural Plasticity2090-59041687-54432015-01-01201510.1155/2015/789502789502Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term PlasticityElizabeth Nieto Mendoza0Elizabeth Hernández Echeagaray1Unidad de Biomedicina, FES-I, Universidad Nacional Autónoma de México, Avenida de los Barrios No. 1, Los Reyes Iztacala, 54090 Tlalnepantla, MEX, MexicoUnidad de Biomedicina, FES-I, Universidad Nacional Autónoma de México, Avenida de los Barrios No. 1, Los Reyes Iztacala, 54090 Tlalnepantla, MEX, MexicoDopamine (DA) modulates glutamatergic synaptic transmission and its plasticity in the striatum; however it is not well known how DA modulates long-term plasticity of striatal GABAergic inhibitory synapses. This work focused on the analysis of both dopaminergic modulation of inhibitory synapses and the synaptic plasticity established between GABAergic afferents to medium spiny neurons (MSNs). Our results showed that low and high DA concentrations mainly reduced the amplitude of inhibitory synaptic response; however detailed analysis of the D1 and D2 participation in this modulation displayed a wide variability in synaptic response. Analyzing DA participation in striatal GABAergic plasticity we observed that high frequency stimulation (HFS) of GABAergic interneurons in the presence of DA at a low concentration (200 nM) favored the expression of inhibitory striatal LTD, whereas higher concentration of DA (20 μM) primarily induced LTP. Interestingly, the plasticity induced in an animal model of striatal degeneration mimicked that induced in the presence of DA at a high concentration, which was not abolished with D2 antagonist but was prevented by PKA blocker.http://dx.doi.org/10.1155/2015/789502 |
| spellingShingle | Elizabeth Nieto Mendoza Elizabeth Hernández Echeagaray Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity Neural Plasticity |
| title | Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity |
| title_full | Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity |
| title_fullStr | Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity |
| title_full_unstemmed | Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity |
| title_short | Dopaminergic Modulation of Striatal Inhibitory Transmission and Long-Term Plasticity |
| title_sort | dopaminergic modulation of striatal inhibitory transmission and long term plasticity |
| url | http://dx.doi.org/10.1155/2015/789502 |
| work_keys_str_mv | AT elizabethnietomendoza dopaminergicmodulationofstriatalinhibitorytransmissionandlongtermplasticity AT elizabethhernandezecheagaray dopaminergicmodulationofstriatalinhibitorytransmissionandlongtermplasticity |