Abstract：
:The ubiquitous polyamines spermidine and spermine are known as modulators of glutamate receptors and inwardly rectifying potassium channels. They are synthesized by a set of specific enzymes in which spermidine synthase is the rate-limiting step catalysing the formation of the spermine precursor spermidine from putrescine. Spermidine and spermine were previously localized to astrocytes, probably reflecting storage rather than synthesis in these cells. In order to identify the cellular origin of spermidine and spermine synthesis in the brain, antibodies were raised against recombinant mouse spermidine synthase. As expected, strong spermidine synthase-like immunoreactivity was obtained in regions known to express high levels of spermidine and spermine, such as the hypothalamic paraventricular and supraoptic nuclei. In the striatum, spermidine synthase was found in neurones and the neuropil of the patch compartment (striosome) as defined by expression of the micro opiate receptor. The distinct expression pattern of spermidine synthase, however, only partially overlapped with the distribution of the products spermidine and spermine in the striatum. In addition, spermidine synthase-like immunoreactivity was seen in patch compartment-apposed putative interneurones. These spermidine synthase-positive neurones did not express any marker characteristic of the major striatal interneurone classes. The neuropil labelling in the patch compartment and in adjacent putative interneurones may indicate a role for polyamines in intercompartmental signalling in the striatum.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
Krauss M,Langnaese K,Richter K,Brunk I,Wieske M,Ahnert-Hilger G,Veh RW,Laube Gdoi
10.1111/j.1471-4159.2006.03721.xkeywords:
subject
Has Abstractpub_date
2006-04-01 00:00:00pages
174-89issue
1eissn
0022-3042issn
1471-4159pii
JNC3721journal_volume
97pub_type
杂志文章abstract：:Monoclonal antibodies were raised against the synaptosomal plasma membranes (SPMs) purified from the electric organ of the Torpedo. One antibody that reacts preferentially with SPMs rather than with other membrane fractions isolated from this tissue was previously found to inhibit hydrophilic and amphiphilic choline-O...
journal_title：Journal of neurochemistry
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journal_title：Journal of neurochemistry
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pub_type： 杂志文章
doi：10.1046/j.1471-4159.1995.65010355.x
更新日期：1995-07-01 00:00:00
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pub_type： 杂志文章
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pub_type： 杂志文章,评审
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journal_title：Journal of neurochemistry
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abstract：:Five subtypes of the muscarinic receptor have been cloned from both the rat and human genomes. Although all five genes have the coding sequences in a single exon, their structures 5' of the initiation codon are largely uncharacterized, except for the M4 receptor. In the brain, muscarinic receptors mediate motor and me...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1999.0720900.x
更新日期：1999-03-01 00:00:00
