In vivo photorelease of GABA in the mouse cortex
Electrical stimulation has been used for more than 100 years in neuroscientific and biomedical research as a powerful tool for controlled perturbations of neural activity. Despite quickly driving neuronal activity, this technique presents some important limitations, such as the impossibility to ac...
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ri-123456789-231122021-07-09T23:13:03Z In vivo photorelease of GABA in the mouse cortex Lopes-dos-Santos, V. Campi, J. Filevich, O. Ribeiro, Sidarta Tollendal Gomes Etchenique, R. Caged compounds Neural stimulation GABA Cerebral cortex Photorelease Electrical stimulation has been used for more than 100 years in neuroscientific and biomedical research as a powerful tool for controlled perturbations of neural activity. Despite quickly driving neuronal activity, this technique presents some important limitations, such as the impossibility to activate or deactivate specific neuronal populations within a single stimulation site. This problem can be avoided by pharmacological methods based on the administration of receptor ligands able to cause specific changes in neuronal activity. However, intracerebral injections of neuroactive molecules inherently confound the dynamics of drug diffusion with receptor activation. Caged compounds have been proposed to circumvent this problem, for spatially and temporally controlled release of molecules. Caged compounds consist of a protecting group and a ligand made inactive by the bond between the two parts. By breaking this bond with light of an appropriate wavelength, the ligand recovers its activity within milliseconds. To test these compounds in vivo, we recorded local field potentials (LFPs) from the cerebral cortex of anesthetized female mice (CF1, 60-70 days, 20-30 g) before and after infusion with caged γ-amino-butyric-acid (GABA). After 30 min, we irradiated the cortical surface with pulses of blue light in order to photorelease the caged GABA and measure its effect on global brain activity. Laser pulses significantly and consistently decreased LFP power in four different frequency bands with a precision of few milliseconds (P < 0.000001); however, the inhibitory effects lasted several minutes (P < 0.0043). The technical difficulties and limitations of neurotransmitter photorelease are presented, and perspectives for future in vivo applications of the method are discussed. 2017-05-26T13:11:17Z 2017-05-26T13:11:17Z 2011-07-25 article 0100-879X https://repositorio.ufrn.br/jspui/handle/123456789/23112 eng Acesso Aberto application/pdf |
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eng |
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Caged compounds Neural stimulation GABA Cerebral cortex Photorelease |
| spellingShingle |
Caged compounds Neural stimulation GABA Cerebral cortex Photorelease Lopes-dos-Santos, V. Campi, J. Filevich, O. Ribeiro, Sidarta Tollendal Gomes Etchenique, R. In vivo photorelease of GABA in the mouse cortex |
| description |
Electrical stimulation has been used for more than 100 years in neuroscientific and biomedical research as a powerful tool for
controlled perturbations of neural activity. Despite quickly driving neuronal activity, this technique presents some important
limitations, such as the impossibility to activate or deactivate specific neuronal populations within a single stimulation site. This
problem can be avoided by pharmacological methods based on the administration of receptor ligands able to cause specific
changes in neuronal activity. However, intracerebral injections of neuroactive molecules inherently confound the dynamics of
drug diffusion with receptor activation. Caged compounds have been proposed to circumvent this problem, for spatially and
temporally controlled release of molecules. Caged compounds consist of a protecting group and a ligand made inactive by the
bond between the two parts. By breaking this bond with light of an appropriate wavelength, the ligand recovers its activity within
milliseconds. To test these compounds in vivo, we recorded local field potentials (LFPs) from the cerebral cortex of anesthetized
female mice (CF1, 60-70 days, 20-30 g) before and after infusion with caged γ-amino-butyric-acid (GABA). After 30 min,
we irradiated the cortical surface with pulses of blue light in order to photorelease the caged GABA and measure its effect on
global brain activity. Laser pulses significantly and consistently decreased LFP power in four different frequency bands with a
precision of few milliseconds (P < 0.000001); however, the inhibitory effects lasted several minutes (P < 0.0043). The technical
difficulties and limitations of neurotransmitter photorelease are presented, and perspectives for future in vivo applications of
the method are discussed. |
| format |
article |
| author |
Lopes-dos-Santos, V. Campi, J. Filevich, O. Ribeiro, Sidarta Tollendal Gomes Etchenique, R. |
| author_facet |
Lopes-dos-Santos, V. Campi, J. Filevich, O. Ribeiro, Sidarta Tollendal Gomes Etchenique, R. |
| author_sort |
Lopes-dos-Santos, V. |
| title |
In vivo photorelease of GABA in the mouse cortex |
| title_short |
In vivo photorelease of GABA in the mouse cortex |
| title_full |
In vivo photorelease of GABA in the mouse cortex |
| title_fullStr |
In vivo photorelease of GABA in the mouse cortex |
| title_full_unstemmed |
In vivo photorelease of GABA in the mouse cortex |
| title_sort |
in vivo photorelease of gaba in the mouse cortex |
| publishDate |
2017 |
| url |
https://repositorio.ufrn.br/jspui/handle/123456789/23112 |
| work_keys_str_mv |
AT lopesdossantosv invivophotoreleaseofgabainthemousecortex AT campij invivophotoreleaseofgabainthemousecortex AT filevicho invivophotoreleaseofgabainthemousecortex AT ribeirosidartatollendalgomes invivophotoreleaseofgabainthemousecortex AT etcheniquer invivophotoreleaseofgabainthemousecortex |
| _version_ |
1773959176344567808 |