Age-related changes in the distribution of Na(v)1.1 and Na(v)1.2 in rat cerebellum.
Modification of sodium channel availability and behavior is obviously a good candidate for alteration of action potential observed during aging. In the present study, we revealed age-related alterations in the expression of voltage-gated Na+ (Na(v)) channel in rat cerebellum by immunohistochemistry. In the cerebellar cortex of aged rats, Na(v)1.1 immunoreactivity in Purkinje cell bodies was highly increased, whereas granule cells showed lower staining intensity. In the cerebellar nuclei of aged rats, Na(v)1.1 and Na(v)1.2 expression was specifically increased in the cerebellar output neurons, which was confirmed by image analysis. The first demonstration of age-related changes in Na(v) channel expression contributes to our understanding of the mechanisms responsible for alteration in synaptic transmission during aging.
Chung
Yoon Hee
YH
Department of Anatomy, Medical Research Center, Seoul National University College of Medicine, 28 Yongon-Dong, Chongno-Gu, Seoul 110-799, Korea.
Joo
Kyeung Min
KM
Kim
Myeung Ju
MJ
Cha
Choong Ik
CI
D000375:Aging / Q000378:metabolism*; D000818:Animals; D002531:Cerebellum / Q000166:cytology / Q000378:metabolism*; D007150:Immunohistochemistry; D008297:Male; D011689:Purkinje Cells / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D015222:Sodium Channels / Q000378:metabolism*; D009435:Synaptic Transmission
D015222:Sodium Channels