Elevated substance P (NK-1) receptor immunoreactivity in the cerebellum of seizure prone gerbil.
In the present study, we performed a comparative analysis of the distribution of substance P (SP) receptor (NK-1) immunoreactivity in order to determine the characteristics of the SP system in the cerebelli of rat and gerbils. In the rat cerebellar cortex, only a few Purkinje cells exhibited weak NK-1 receptor immunoreactivity. Similar to the case of rat, NK-1 receptor immunoreactivity in the cerebellar cortex of seizure resistant (SR) gerbils was rarely detected. In contrast, in the cerebellar cortex of seizure sensitive (SS) gerbils, dendrites and cell bodies of Purkinje cell showed strong NK-1 receptor immunoreactivity. Similar to the cerebellar cortex, little NK-1 receptor immunoreactivity in deep cerebellar nuclei was observed in the rat. In SR gerbils, however, deep cerebellar nuclei showed weak NK-1 receptor immunoreactivity. NK-1 receptor immunoreactivity in the deep cerebellar nuclei of SS gerbils was markedly increased, as compared with SR gerbils. Based on the present data, we suggest that the SP system of cerebellar circuit in gerbil are different from rat, and over-expression of NK-1 receptor immunoreactivity in Purkinje cells of SS gerbils may be relevant to Purkinje cell loss induced by seizure activity.
Kim
Duk-Soo
DS
Department of Anatomy, College of Medicine, Hallym University, Chunchon, Kangwon-Do 200-702, Republic of Korea.
Yoo
Ki-Yeon
KY
Hwang
In-Koo
IK
Jung
Ju-Young
JY
Won
Moo Ho
MH
Seo
Je Hoon
JH
Kang
Tae-Cheon
TC
D000818:Animals; D000906:Antibodies; D002529:Cerebellar Nuclei / Q000378:metabolism; D003342:Corpus Striatum / Q000378:metabolism; D004827:Epilepsy / Q000378:metabolism*; D005849:Gerbillinae; D007150:Immunohistochemistry; D011689:Purkinje Cells / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D018040:Receptors, Neurokinin-1 / Q000276:immunology / Q000378:metabolism*; D013373:Substance P / Q000378:metabolism*
D000906:Antibodies; D018040:Receptors, Neurokinin-1; D013373:Substance P