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More MS news articles for October 2002

Aminergic receptors in astrogliotic plaques from patients with multiple sclerosis

Neurosci Lett 2002 Oct 11;331(2):87
Zeinstra E, te Riele P, Langlois X, Wilczak N, Leysen J, De Keyser J.
Department of Neurology, University Hospital Groningen, Hanzeplein 1, 9700RB, The, Groningen, Netherlands

Cultured astrocytes express a spectrum of neurotransmitter receptors.

However, little is known about these receptors in situ.

We previously reported the absence of beta(2) adrenergic receptors on astrocytes in multiple sclerosis (MS).

Here we used [(3)H]-radioligands and receptor autoradiography to screen for a variety of other aminergic receptors in six silent chronic astrogliotic plaques in brain tissue obtained from five patients with MS.

Dopamine D(1) and histamine H(1) receptors were absent.

We detected specific binding for cholinergic muscarinic receptors > dopamine D(2), alpha(1-) and alpha(2)-adrenergic receptors > 5-HT(1A), 5-HT(1B/D), 5-HT(2A), 5-HT(2c), 5-HT(4), and dopamine D(3) receptors.

Radiotracers for these aminergic receptors might be useful for studying astrogliosis in patients with MS, and compounds acting at some of these receptors may have potential to modulate astroglial function in MS.