Role of Nicotinamide N-Methyltransferase in Dorsal Striatum in Cocaine Place Preference
Role of Nicotinamide N-Methyltransferase in Dorsal Striatum in Cocaine Place Preference
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背侧纹状体烟酰胺 N-甲基转移酶在可卡因位置偏好中的作用
DOI:
10.1038/npp.2017.147
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发表时间:
2017-07
影响因子:
7.6
通讯作者:
Cen Xiaobo
中科院分区:
文献类型:
--
作者:
Luo Li;Shang Fei Fei;Long Hailei;Jiang Linhong;Zhu Ruiming;Zhao Qian;Gu Hui;Kong Jueying;Xu Wei;Zhao Yinglan;Cen Xiaobo
Nicotinamide N-methyltransferase (NNMT) transfers the methyl from S-adenosyl-L-methionine (SAM) to nicotinamide (NA) to produce S-adenosyl-L-homocysteine (SAH) and 1-methylnicotinamide (MeN). NNMT has been implicated in a variety of diseases; however, the role of NNMT in drug addiction is largely unknown. Here, we found that the expression of Nnmt was significantly upregulated in the dorsal striatum (DS) of cocaine-conditioned mice. Cocaine significantly decreased SAM/SAH ratio levels in the DS, which was accompanied with the decreased activities of Rac1 and RhoA. Lentivirus-mediated knockdown of Nnmt in the dorsomedial striatum (DMS) attenuated cocaine conditioned place preference (CPP) reward, but increased striatal SAM/SAH ratio levels as well as Rac1 and RhoA activities. In addition, pharmacological inhibition of NNMT through intra-DMS infusion of MeN attenuated cocaine CPP and the activities of Rac1 and RhoA, but increased SAM/SAH ratio. These results suggest that NNMT-dependent transmethylation is involved in the activation of Rac1 and RhoA, which utilize SAM as a methyl donor cofactor. Co-immunoprecipitation assay using a RhoGDIα antibody indirectly captured Rac1 or RhoA that were bound to RhoGDIα. The results showed that cocaine increased the association of RhoGDIα with Rac1 or RhoA, whereas such effect was inhibited by Nnmt knockdown. Collectively, our findings show that NNMT regulates cocaine CPP through SAM-mediated modification of Rac1 and RhoA.
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影响因子:
82.9
作者:
Hong S;Moreno-Navarrete JM;Wei X;Kikukawa Y;Tzameli I;Prasad D;Lee Y;Asara JM;Fernandez-Real JM;Maratos-Flier E;Pissios P
通讯作者:
Pissios P
DOI:
10.1093/jnen/61.2.111
发表时间:
2002-02-01
影响因子:
3.2
作者:
Parsons, RB;Smith, ML;Ramsden, DB
通讯作者:
Ramsden, DB
影响因子:
5.3
作者:
Black, Yolanda D.;Maclaren, Fair R.;Konradi, Christine
通讯作者:
Konradi, Christine
影响因子:
4.6
作者:
Liu W;Shang FF;Xu Y;Belegu V;Xia L;Zhao W;Liu R;Wang W;Liu J;Li CY;Wang TH
通讯作者:
Wang TH
DOI:
10.1038/npp.2012.104
发表时间:
2012-10
期刊:
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology
影响因子:
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作者:
通讯作者:
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