Metachlorophenylpiperazine (m-CPP) induced intracavernous pressure responses in anaesthetized rats
| Autor: | E S Hayes, P.G. Adaikan |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Agonist
Male medicine.medical_specialty Spiperone Ketanserin medicine.drug_class Urology (+)-Naloxone Piperazines Rats Sprague-Dawley Sexual Behavior Animal Internal medicine medicine Pressure Animals Anesthesia 8-Hydroxy-2-(di-n-propylamino)tetralin integumentary system business.industry musculoskeletal neural and ocular physiology Quipazine Penile Erection Mianserin humanities nervous system diseases Yohimbine Rats Serotonin Receptor Agonists Endocrinology Serotonin business medicine.drug Penis |
| Zdroj: | International journal of impotence research. 14(4) |
| ISSN: | 0955-9930 |
| Popis: | Here we have recorded the effects of metachlorophenylpiperazine (m-CPP) on intracavernous pressure (ICP) in anesthetized rats pretreated with various pharmacological agents in an attempt to determine the mechanism and relevance of the m-CPP induced ICP response to other models of erection. m-CPP elicited consistent and significantly greater increases in ICP (71.5+/-6.6 mmHg) compared with the mixed 5-HT(2a/2c) agonists trifluoromethylphenylpiperazine (3.4+/-1.3 mmHg) and quipazine (10.9+/-1.8 mmHg). Blockade of 5-HT(2a) receptors with ketanserin failed to unmask any stimulatory effect of quipazine (7.2+/-1.0 mmHg). m-CPP induced ICP responses (71+/-7.0 mmHg) were unaffected in the presence of mianserin (63+/-5 mmHg) and ketanserin (51+/-12 mmHg). Spiperone significantly reduced the m-CPP induced increase in ICP (8.0+/-1.0 mmHg). Naloxone, yohimbine and 8-hydroxy-2-(di-n-propylamino)tetralin (8-OHDPAT) failed to elicit increases in ICP on their own. All three drugs significantly reduced the latency to the first m-CPP induced ICP response compared to saline. Yohimbine increased the duration of m-CPP induced ICP responses whereas 8-OHDPAT increased the mean number of m-CPP induced ICP responses compared to saline. The effects of m-CPP on ICP in anesthetized rats may not be mediated by 5-HT(2c) receptors and appears to be similar to erection in copula, but not erection elicited by other drugs or penile sheath retraction. |
| Databáze: | OpenAIRE |
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