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短期和长期吗啡暴露后不同脑区磷酸化CREB表达的变化:与食物摄入的关系。

Alterations in phosphorylated CREB expression in different brain regions following short- and long-term morphine exposure: relationship to food intake.

作者信息

Ren Xiuhai, Lutfy Kabirullah, Mangubat Michael, Ferrini Monica G, Lee Martin L, Liu Yanjun, Friedman Theodore C

机构信息

Division of Endocrinology, Metabolism and Molecular Medicine, Department of Medicine, Charles R. Drew University of Medicine and Science and UCLA School of Medicine, 1731 E. 120th. Street, Los Angeles, CA 90059, USA.

出版信息

J Obes. 2013;2013:764742. doi: 10.1155/2013/764742. Epub 2013 Aug 29.

DOI:10.1155/2013/764742
PMID:24073333
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3773431/
Abstract

BACKGROUND

Activation of the cyclic adenosine monophosphate (cAMP)/phosphorylated CREB (P-CREB) system in different brain regions has been implicated in mediating opioid tolerance and dependence, while alteration of this system in the lateral hypothalamus (LH) has been suggested to have a role in food intake and body weight.

METHODS

Given that opioids regulate food intake, we measured P-CREB in different brain regions in mice exposed to morphine treatments designed to induce different degrees of tolerance and dependence.

RESULTS

We found that a single morphine injection or daily morphine injections for 8 days did not influence P-CREB levels, while the escalating dose of morphine regimen raised P-CREB levels only in the ventral tegmental area (VTA). Chronic morphine pellet implantation for 7 days raised P-CREB levels in the LH, VTA, and dorsomedial nucleus of the hypothalamus (DM) but not in the nucleus accumbens and amygdala. Increased P-CREB levels in LH, VTA, and DM following 7-day treatment with morphine pellets and increased P-CREB levels in the VTA following escalating doses of morphine were associated with decreased food intake and body weight.

CONCLUSION

The morphine regulation of P-CREB may explain some of the physiological sequelae of opioid exposure including altered food intake and body weight.

摘要

背景

不同脑区中环磷酸腺苷(cAMP)/磷酸化环磷腺苷反应元件结合蛋白(P-CREB)系统的激活与阿片类药物耐受性和依赖性的介导有关,而下丘脑外侧区(LH)中该系统的改变被认为在食物摄入和体重方面发挥作用。

方法

鉴于阿片类药物调节食物摄入,我们在接受旨在诱导不同程度耐受性和依赖性的吗啡治疗的小鼠的不同脑区中测量了P-CREB。

结果

我们发现单次注射吗啡或每日注射吗啡8天对P-CREB水平没有影响,而递增剂量的吗啡方案仅使腹侧被盖区(VTA)的P-CREB水平升高。慢性植入吗啡微丸7天可使LH、VTA和下丘脑背内侧核(DM)的P-CREB水平升高,但伏隔核和杏仁核的P-CREB水平未升高。吗啡微丸治疗7天后LH、VTA和DM中P-CREB水平升高以及递增剂量吗啡后VTA中P-CREB水平升高与食物摄入量和体重下降有关。

结论

吗啡对P-CREB的调节可能解释了阿片类药物暴露的一些生理后果,包括食物摄入和体重的改变。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/f575cf68768d/JOBES2013-764742.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/bf1065995e71/JOBES2013-764742.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/49cda3d58363/JOBES2013-764742.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/8eb93bd38baf/JOBES2013-764742.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/f7108b80773d/JOBES2013-764742.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/f575cf68768d/JOBES2013-764742.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/bf1065995e71/JOBES2013-764742.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/49cda3d58363/JOBES2013-764742.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/8eb93bd38baf/JOBES2013-764742.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/f7108b80773d/JOBES2013-764742.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/208b/3773431/f575cf68768d/JOBES2013-764742.005.jpg

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