Autoradiographic localization of nicotinic receptor binding in rat brain using [3H]methylcarbamylcholine, a novel radioligand

Shizuo Yamada, Donald R. Gehlert, Kumiko N. Hawkins, Koichi Nakayama, William R. Roeske, Henry I. Yamamura

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Light microscopic autoradiography was used to visualize the neuroanatomical distribution of nicotinic receptors in rat brain using a novel radioligand, [3H]methylcarbamylcholine (MCC). Specific [3H]MCC binding to slide-mounted tissue sections of rat brain was saturable, reversible and of high affinity. Data analysis revealed a single population of [3H]MCC binding sites with a Kd value of 1.8 nM and Bmax of 20.1 fmol/mg protein. Nicotinic agonists and antagonists competed for [3H]MCC binding sites in slide-mounted brain sections with much greater potency than muscarinic drugs. The rat brain areas containing the highest densities of [3H]MCC binding were in thalamic regions, the medial habenular nucleus and the superior colliculus. Moderate densities of [3H]MCC binding were seen over the anterior cingulate cortex, the nucleus accumbens, the zona compacta of substantia nigra and ventral tegmental area. Low densities of [3H]MCC binding were found in most other brain regions. These data suggest that [3H]MCC selectively labels central nicotinic receptors and that these receptors are concentrated in the thalamus, the medial habenular nucleus and the superior colliculus of the rat brain.

Original languageEnglish (US)
Pages (from-to)2851-2861
Number of pages11
JournalLife Sciences
Volume41
Issue number26
DOIs
StatePublished - Dec 28 1987
Externally publishedYes

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Nicotinic Receptors
Rats
Brain
Habenula
Superior Colliculi
Binding Sites
Nicotinic Agonists
Nicotinic Antagonists
Ventral Tegmental Area
N-methylcarbamylcholine
Gyrus Cinguli
Nucleus Accumbens
Herpes Zoster
Autoradiography
Thalamus
Cholinergic Agents
Labels
Tissue
Light
Pharmaceutical Preparations

ASJC Scopus subject areas

  • Pharmacology

Cite this

Autoradiographic localization of nicotinic receptor binding in rat brain using [3H]methylcarbamylcholine, a novel radioligand. / Yamada, Shizuo; Gehlert, Donald R.; Hawkins, Kumiko N.; Nakayama, Koichi; Roeske, William R.; Yamamura, Henry I.

In: Life Sciences, Vol. 41, No. 26, 28.12.1987, p. 2851-2861.

Research output: Contribution to journalArticle

Yamada, Shizuo ; Gehlert, Donald R. ; Hawkins, Kumiko N. ; Nakayama, Koichi ; Roeske, William R. ; Yamamura, Henry I. / Autoradiographic localization of nicotinic receptor binding in rat brain using [3H]methylcarbamylcholine, a novel radioligand. In: Life Sciences. 1987 ; Vol. 41, No. 26. pp. 2851-2861.
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