TY - JOUR
T1 - Immunolocalization of the voltage-gated potassium channel Kv2.2 in GABAergic neurons in the basal forebrain of rats and mice
AU - Hermanstyne, Tracey O.
AU - Kihira, Yoshitaka
AU - Misono, Kaori
AU - Deitchler, Ashley
AU - Yanagawa, Yuchio
AU - Misonou, Hiroaki
PY - 2010/11
Y1 - 2010/11
N2 - The Kv2 voltage-gated potassium channels, Kv2.1 and Kv2.2, are important regulators of neuronal excitability in mammalian brain. It has been shown that Kv2.1 channels are expressed in virtually all neurons in the brain. However, the cellular localization of Kv2.2 has not been fully elucidated. In this article we report that Kv2.2 is highly expressed in a subset of neurons in the magnocellular preoptic nucleus (MCPO) and the horizontal limb of the diagonal band of Broca (HDB) of the basal forebrain complex, which are areas highly implicated in the regulation of cortical activity and the sleep/wake cycle. It has been shown that MCPO and HDB contain distinct populations of neurons that differ in their neurochemicals, cholinergic, glutamatergic, and gamma-aminobutyric acid (GABA)ergic neurons. Using specific immunolabeling and knockin mice in which green fluorescent protein (GFP) is expressed in GABAergic neurons, we found that Kv2.2 is abundantly expressed in a large subpopulation of the GABAergic neurons in the MCPO and HDB. These data offer Kv2.2 as a molecular target to study the role of the specific subpopulation of basal forebrain GABAergic neurons.
AB - The Kv2 voltage-gated potassium channels, Kv2.1 and Kv2.2, are important regulators of neuronal excitability in mammalian brain. It has been shown that Kv2.1 channels are expressed in virtually all neurons in the brain. However, the cellular localization of Kv2.2 has not been fully elucidated. In this article we report that Kv2.2 is highly expressed in a subset of neurons in the magnocellular preoptic nucleus (MCPO) and the horizontal limb of the diagonal band of Broca (HDB) of the basal forebrain complex, which are areas highly implicated in the regulation of cortical activity and the sleep/wake cycle. It has been shown that MCPO and HDB contain distinct populations of neurons that differ in their neurochemicals, cholinergic, glutamatergic, and gamma-aminobutyric acid (GABA)ergic neurons. Using specific immunolabeling and knockin mice in which green fluorescent protein (GFP) is expressed in GABAergic neurons, we found that Kv2.2 is abundantly expressed in a large subpopulation of the GABAergic neurons in the MCPO and HDB. These data offer Kv2.2 as a molecular target to study the role of the specific subpopulation of basal forebrain GABAergic neurons.
KW - Antibody
KW - Corticopetal projection
KW - Magnocellular preoptic nucleus
KW - Potassium channel
KW - Sleep
UR - http://www.scopus.com/inward/record.url?scp=77957903137&partnerID=8YFLogxK
U2 - 10.1002/cne.22457
DO - 10.1002/cne.22457
M3 - Article
C2 - 20853508
AN - SCOPUS:77957903137
SN - 0021-9967
VL - 518
SP - 4298
EP - 4310
JO - Journal of Comparative Neurology
JF - Journal of Comparative Neurology
IS - 21
ER -