Abstract:
:We have developed a superfusion method utilizing an open-volume microfluidic device for administration of pharmacologically active substances to selected areas in brain slices with high spatio-temporal resolution. The method consists of a hydrodynamically confined flow of the active chemical compound, which locally stimulates neurons in brain slices, applied in conjunction with electrophysiological recording techniques to analyze the response. The microfluidic device, which is a novel free-standing multifunctional pipette, allows diverse superfusion experiments, such as testing the effects of different concentrations of drugs or drug candidates on neurons in different cell layers with high positional accuracy, affecting only a small number of cells. We demonstrate herein the use of the method with electrophysiological recordings of pyramidal cells in hippocampal and prefrontal cortex brain slices from rats, determine the dependence of electric responses on the distance of the superfusion device from the recording site, document a multifold gain in solution exchange time as compared to whole slice perfusion, and show that the device is able to store and deliver up to four solutions in a series. Localized solution delivery by means of open-volume microfluidic technology also reduces reagent consumption and tissue culture expenses significantly, while allowing more data to be collected from a single tissue slice, thus reducing the number of laboratory animals to be sacrificed for a study.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Ahemaiti A,Ainla A,Jeffries GD,Wigström H,Orwar O,Jesorka A,Jardemark Kdoi
10.1016/j.jneumeth.2013.08.012subject
Has Abstractpub_date
2013-10-15 00:00:00pages
292-6issue
2eissn
0165-0270issn
1872-678Xpii
S0165-0270(13)00283-5journal_volume
219pub_type
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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journal_title:Journal of neuroscience methods
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