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Effects induced by cysteamine on chemically-induced nociception in mice
S Pieretti1, A Di Giannuario, A Capasso
1Istituto Superiore di Sanita, Rome, Italy.
Life Sciences
|January 1, 1994
Summary
Cysteamine, a somatostatin depletor, reduces chemically induced pain in mice. This antinociceptive effect is mediated by somatostatin, suggesting its role in pain modulation.
Area of Science:
- Neuroscience
- Pharmacology
- Pain Research
Background:
- Cysteamine is known to deplete somatostatin.
- The role of somatostatin in pain pathways is not fully understood.
Purpose of the Study:
- To investigate the effects of cysteamine on chemically induced pain in mice.
- To elucidate the involvement of somatostatin in cysteamine's antinociceptive effects.
Main Methods:
- Administration of cysteamine to mice followed by chemical stimuli (formalin, acetic acid).
- Assessment of antinociceptive effects using licking response and writhing tests.
- Evaluation of the roles of somatostatin, naloxone, yohimbine, and a somatostatin antagonist.
Main Results:
- Cysteamine significantly reduced pain responses in both formalin and acetic acid tests.
- Intrathecal somatostatin reversed cysteamine's antinociceptive effects, while intracerebroventricular somatostatin reduced them.
- A somatostatin antagonist enhanced cysteamine's pain-reducing effects.
Conclusions:
- Somatostatin plays a crucial role in mediating cysteamine's antinociceptive actions.
- Cysteamine's pain-relieving properties are linked to somatostatin depletion.
- Findings suggest potential therapeutic targets for pain management involving the somatostatin system.