Abstract
Noradrenaline acting via β-adrenoceptors (β-ARs) in the CNS plays an important role in learning/memory and cognitive functions. β-ARs have been shown to be expressed in cortical pyramidal and subcortical principal cells. However, little is known about β-AR expression in different subtypes of GABAergic neurons. Here, we report that both β1- and β2-ARs are expressed in a majority of GABAergic interneurons in the medial prefrontal cortex of mice, including parvalbumin (PV)-, calretinin (CR)-, calbindin D-28k (CB)-, somatostatin (SST)- and Reelin-immunoreactive (ir) interneurons. Relative to PV-, CB-, SST- and Reelin-ir interneurons, CR-ir interneurons are less likely to express β1- and β2-ARs. SST-ir interneurons are more likely to express β2-AR compared with the other subtypes of interneurons. The present results are of significance for understanding the role of β-ARs in prefrontal cortical functions.
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