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首页> 外文期刊>Receptors and Channels >Interactions of 'Ultra-Low' Doses of Naltrexone and Morphine in Mature and Young Male and Female Rats
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Interactions of 'Ultra-Low' Doses of Naltrexone and Morphine in Mature and Young Male and Female Rats

机译:纳曲酮和吗啡的“超低”剂量在成年和成年雌雄大鼠中的相互作用

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摘要

Sex and age influence morphine analgesia in humans and animals. Mature rats show greater morphine analgesia in males than in females. Ultra-low doses of naltrexone enhance morphine analgesia. In mature rats (18-22 weeks), naltrexone (0.002-2.0 mg/kg)-morphine (2 mg/kg) cotreatment enhanced morphine analgesia in females, an effect inversely related to naltrexone dose. Conversely, in mature male rats, naltrexone tended to decrease morphine analgesia with increasing dose. In young rats (8-10 weeks), morphine analgesia was unrelated to sex and in both sexes the naltrexone-morphine interaction was negligible. These data show that dose, age, and sex alter the naltrexone-morphine interaction in rats.
机译:性别和年龄影响人和动物的吗啡镇痛作用。成熟的大鼠在雄性中比在雌性中具有更大的吗啡镇痛作用。超低剂量的纳曲酮可增强吗啡镇痛作用。在成年大鼠(18-22周)中,纳曲酮(0.002-2.0 mg / kg)-吗啡(2 mg / kg)联合治疗可增强雌性吗啡镇痛作用,该作用与纳曲酮剂量成反比。相反,在成年雄性大鼠中,纳曲酮倾向于随着剂量增加而减少吗啡镇痛作用。在幼鼠(8-10周)中,吗啡镇痛与性别无关,在男女中,纳曲酮-吗啡的相互作用均可以忽略不计。这些数据表明剂量,年龄和性别会改变大鼠的纳曲酮-吗啡相互作用。

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