Associative pairing involving monocular stimulation selectively mobilizes a subclass of GABAergic interneurons in the mouse visual cortex
| Autor: | R. Zakrzewska, Monika Liguz-Lecznar, Wioletta J. Waleszczyk, Malgorzata Kossut, Jolanta Skangiel-Kramska |
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| Rok vydání: | 2009 |
| Předmět: |
genetic structures
Conditioning Classical Cell Count Sensory system Biology Somatosensory system Auditory cortex Mice Heart Rate Interneurons Vision Monocular medicine Animals gamma-Aminobutyric Acid Visual Cortex Auditory Cortex Electroshock Glutamate Decarboxylase General Neuroscience Association Learning Barrel cortex eye diseases Up-Regulation Parvalbumins medicine.anatomical_structure Visual cortex Cerebral cortex Visual Perception biology.protein GABAergic Neuroscience Photic Stimulation Parvalbumin |
| Zdroj: | The Journal of Comparative Neurology. 516:482-492 |
| ISSN: | 1096-9861 0021-9967 |
| DOI: | 10.1002/cne.22129 |
| Popis: | Levels of γ-aminobutyric acid (GABA) and its synthesizing enzyme in cerebral cortex are regulated by sensory experience. Previously we found that associative pairing of vibrissae stimulation and tail shock results in upregulation of GABAergic markers in the mouse barrel cortex. In order to ascertain whether GABAergic upregulation also accompanies associative pairing in other sensory modalities, we examined the mouse visual cortex after analogous training with visual stimulus. During pairing, visual stimulus (CS) was coupled with a tail shock (UCS). We examined the density of cells expressing glutamic acid decarboxylase (GAD) and parvalbumin (PV) in monocular and binocular segments of the primary visual cortex (V1). The auditory cortex was used as a control. After monocular training, the density of cells expressing GAD rose significantly in the monocular segment of V1 contralateral to the stimulated eye, compared with the opposite hemisphere. This effect was due to the association of CS and UCS, as no changes were found after visual stimulation alone or in the auditory cortex. No changes were noted in the density of PV+ neurons, so the effect was attributed to GAD+/PV− neurons. Mobilization of a specific subclass of GABAergic cells, observed after associative pairing in the somatosensory and visual cortices, may reflect the necessity to restrict the activity of circuits involved in sensory association. J. Comp. Neurol. 516:482–492, 2009. © 2009 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
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