Abstract:
:Release of somatostatin into the circulation from the activated TRPV1-expressing nociceptors revealed by antidromic stimulation of dorsal roots in the rat pinpointed to a novel potential drug target on these nociceptors. The review summarizes the functional, biochemical and pharmacological evidence for a novel somatostatin-mediated counter-regulatory antiinflammatory/antinociceptive "sensocrine" function in rats and guinea-pigs. To identify the somatostatin receptor subtype(s) responsible for this function, experiments were focused on actions of sstR4 receptor agonists as this subtype, similarly to sstR1, is not involved in endocrine regulation. Involvement of somatostatin and the sstR4 was revealed by using pretreatment with somatostatin antibody, depletion of somatostatin with cysteamine, measuring the plasma somatostatin-like immunoreactivity, release from nerves in vitro from isolated trachea, detection of sstR4 receptors in animal and human tissue specimens, using sstR4 gene-deleted mice and investigating in detail effects of a stable peptide analogue of somatostatin (TT-232) and of an ultrapotent non-peptide agonist of sstR4 receptors. Promising antinociceptive, antihyperalgesic effects of these sstR4 agonists were observed in various experimental models of inflammatory and neuropathic conditions which are mediated both by TRPV1-expressing nociceptors and non-neural cells involved in mediation of inflammation. In sstR4 receptor knockout mice an aggravation of inflammation and hyperalgesia was observed.
journal_name
Curr Top Med Chemjournal_title
Current topics in medicinal chemistryauthors
Szolcsányi J,Pintér E,Helyes Z,Petho Gdoi
10.2174/156802611796904852subject
Has Abstractpub_date
2011-01-01 00:00:00pages
2253-63issue
17eissn
1568-0266issn
1873-4294pii
BSP/CTMC/E-Pub/-000163-11-19journal_volume
11pub_type
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journal_title:Current topics in medicinal chemistry
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doi:10.2174/156802611797470349
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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journal_title:Current topics in medicinal chemistry
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