TY  - JOUR
A1  - Song, Ning-Ning
A1  - Xiu, Jian-Bo
A1  - Huang, Ying
A1  - Chen, Jia-Yin
A1  - Zhang, Lei
A1  - Gutknecht, Lise
A1  - Lesch, Klaus Peter
A1  - Li, He
A1  - Ding, Yu-Qiang
T1  - Adult Raphe-Specific Deletion of Lmx1b Leads to Central Serotonin Deficiency
JF  - PLoS ONE
N2  - The transcription factor Lmx1b is essential for the differentiation and survival of central serotonergic (5-HTergic) neurons during embryonic development. However, the role of Lmx1b in adult 5-HTergic neurons is unknown. We used an inducible Cre-LoxP system to selectively inactivate Lmx1b expression in the raphe nuclei of adult mice. Pet1-CreER(T2) mice were generated and crossed with Lmx1b(flox/flox) mice to obtain Pet1-CreER(T2); Lmx1b(flox/flox) mice (which termed as Lmx1b iCKO). After administration of tamoxifen, the level of 5-HT in the brain of Lmx1b iCKO mice was reduced to 60% of that in control mice, and the expression of tryptophan hydroxylase 2 (Tph2), serotonin transporter (Sert) and vesicular monoamine transporter 2 (Vmat2) was greatly down-regulated. On the other hand, the expression of dopamine and norepinephrine as well as aromatic L-amino acid decarboxylase (Aadc) and Pet1 was unchanged. Our results reveal that Lmx1b is required for the biosynthesis of 5-HT in adult mouse brain, and it may be involved in maintaining normal functions of central 5-HTergic neurons by regulating the expression of Tph2, Sert and Vmat2.
KW  - Molecular-genetics
KW  - Sonic hedgehog
KW  - Neurons
KW  - Mice
KW  - Brain
KW  - Expression
KW  - System
KW  - PET-1
KW  - Transporter
KW  - Disorders
Y1  - 2011
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-133581
VL  - 6
IS  - 1
ER  - 
TY  - JOUR
A1  - Song, Ning-Ning
A1  - Jia, Yun-Fang
A1  - Zhang, Lei
A1  - Zhang, Qiong
A1  - Huang, Ying
A1  - Liu, Xiao-Zhen
A1  - Hu, Ling
A1  - Lan, Wei
A1  - Chen, Ling
A1  - Lesch, Klaus-Peter
A1  - Chen, Xiaoyan
A1  - Xu, Lin
A1  - Ding, Yu-Qiang
T1  - Reducing central serotonin in adulthood promotes hippocampal neurogenesis
JF  - Scientific Reports
N2  - Chronic administration of selective serotonin reuptake inhibitors (SSRIs), which up-regulates central serotonin (5-HT) system function, enhances adult hippocampal neurogenesis. However, the relationship between central 5-HT system and adult neurogenesis has not fully been understood. Here, we report that lowering 5-HT level in adulthood is also able to enhance adult hippocampal neurogenesis. We used tamoxifen (TM)-induced Cre in Pet1-CreER\(^{T2}\) mice to either deplete central serotonergic (5-HTergic) neurons or inactivate 5-HT synthesis in adulthood and explore the role of central 5-HT in adult hippocampal neurogenesis. A dramatic increase in hippocampal neurogenesis is present in these two central 5-HT-deficient mice and it is largely prevented by administration of agonist for 5-HTR2c receptor. In addition, the survival of new-born neurons in the hippocampus is enhanced. Furthermore, the adult 5-HT-deficient mice showed reduced depression-like behaviors but enhanced contextual fear memory. These findings demonstrate that lowering central 5-HT function in adulthood can also enhance adult hippocampal neurogenesis, thus revealing a new aspect of central 5-HT in regulating adult neurogenesis.
KW  - serotonin
KW  - SSRI
KW  - hippocampal neurogenesis
KW  - adulthood
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-168004
VL  - 6
IS  - 20338
ER  -