Nicotine formulations impact reinforcement-related behaviors in a mouse model of vapor self-administration.

Nicotine formulations impact reinforcement-related behaviors in a mouse model of vapor self-administration.
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尼古丁制剂会影响蒸汽自我给药的小鼠模型中与增强相关的行为。

DOI:
10.1016/j.drugalcdep.2021.108732
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发表时间:
2021-07-01
影响因子:
4.2
通讯作者:
Cooper SY
Cooper SY
中科院分区:
医学2区
文献类型:
--
作者:
Henderson BJ;Cooper SY

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电子尼古丁输送系统(END)不同于可燃香烟,因为根据产品的不同,可能使用尼古丁盐基或无尼古丁基烟。我们研究了尼古丁盐和游离碱制剂如何改变雄性和雌性小鼠的e-Vape®自我给药(EVSA)行为和血浆可替宁水平。成年C57/BL6J小鼠用于EVSA和指定的蒸发电子液体(50:50 PGVG、6 mg/mL尼古丁无碱或6 mg/mL尼古丁盐)。小鼠按固定比例1(FR1)的时间表升级,每天2小时,然后过渡到FR3以检查与强化相关的行为。在这里,我们观察到,与不服用尼古丁的小鼠相比,给予尼古丁盐的小鼠在FR3时间表上表现出更高的EVSA。此外,在受控被动吸入给药后,被分配尼古丁盐的小鼠表现出更高的血浆可替宁浓度。这些数据提供了证据,证明尼古丁-盐配方可能有助于更大的强化相关行为,并强调了关于尼古丁配方的进一步研究的必要性。
Electronic nicotine delivery systems (ENDS) differ from combustible cigarettes given that nicotine-salt or nicotine-freebase may be used depending on the product. We have investigated how nicotine-salt and freebase formulations alter e-Vape® self-administration (EVSA) behavior and plasma cotinine levels in male and female mice. Adult C57/BL6J mice were used in EVSA and assigned vaping e-liquids (50:50 PGVG, 6 mg/mL nicotine-freebase, or 6 mg/mL nicotine-salt). Mice were escalated on a fixed ratio 1 (FR1) schedule in daily 2 hr sessions and then transitioned to a FR3 to examine reinforcement-related behaviors. Here we observed that mice assigned nicotine-salt exhibited increased EVSA on a FR3 schedule compared to nicotine-freebase. Additionally, mice assigned nicotine-salt exhibited higher plasma cotinine concentrations following delivery-controlled passive-inhalation sessions. These data provide evidence nicotine-salt formulations may contribute to greater reinforcement-related behavior and highlight the need for further investigations regarding nicotine formulation in ENDS.
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