We have previously demonstrated that gonadectomy either prior to (early) or after (late) puberty elevated ethanol consumption in males to levels similar to intact adult females-effects that were attenuated by testosterone replacement. To assess whether alterations in the aversive effects of ethanol might contribute to gonadectomy-associated increases in ethanol intake in males, the present study examined the impact of gonadectomy on conditioned taste aversions (CTA) to ethanol in male and female Sprague-Dawley rats. Animals were gonadectomized, received sham surgery (SH) or non-manipulated (NM) on postnatal (P) day 23 (early) or 67 (late) and tested for CTA to ethanol in adulthood. Water-deprived rats were given 1 hr access every-other-day to 10% sucrose followed by an injection of ethanol (0, 1g/kg) for 5 test sessions. Test data were analyzed to determine the first day significant aversions emerged in each ethanol group (i.e., sucrose intakes significantly less than their saline-injected counterparts). Early gonadectomized males acquired the CTA more rapidly than did early SH and NM males (day 1 vs 3 and 4 respectively), whereas a gonadectomy-associated enhancement in ethanol CTA was not evident in late males. Among females, gonadectomy had little impact on ethanol-induced CTA, with females in all groups showing an aversion by the first or second day, regardless of surgery age. These data suggest that previously observed elevations in ethanol intake induced by either pre- or post-pubertal gonadectomy in males are not related simply to gonadectomy-induced alterations in the aversive effects of ethanol indexed via CTA.

译文

我们以前已经证明,在青春期 (早期) 或青春期 (晚期) 之前进行性腺切除术会将男性的乙醇消耗量提高到与完整的成年女性相似的水平-睾丸激素替代作用会减弱。为了评估乙醇的厌恶作用的改变是否可能导致男性性腺切除术相关的乙醇摄入量增加,本研究检查了性腺切除术对雄性和雌性Sprague-Dawley大鼠对乙醇的条件性味厌恶 (CTA) 的影响。在出生后第23天 (早期) 或第67天 (晚期) 对动物进行性腺切除,接受假手术 (SH) 或非操纵 (NM),并在成年后测试CTA至乙醇。每隔一天给缺水的大鼠1小时10% 蔗糖,然后注射乙醇 (0,1 g/kg) 进行5次测试。分析测试数据以确定每个乙醇组中出现的第一天明显厌恶 (即,蔗糖摄入量明显少于注射盐水的对应物)。早期性腺切除的男性获得CTA的速度比早期SH和NM的男性更快 (分别为第1天和第3天和第4天),而在晚期男性中,性腺切除术相关的乙醇CTA增强并不明显。在女性中,性腺切除术对乙醇诱导的CTA几乎没有影响,无论手术年龄如何,所有组的女性在第一天或第二天都表现出厌恶情绪。这些数据表明,先前观察到的男性青春期前或青春期后性腺切除术引起的乙醇摄入量升高与性腺切除术引起的通过CTA索引的乙醇厌恶作用的改变无关。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录