Effects of neural stem cell LSD1 conditional knockout on the mood and memory in mice / 中国实验动物学报

ABSTRACT

Objective To study the function of LSD1 in the development of neurons and the influence of LSD1 on mood and memory-related behavior in mice. Methods The LSD1(flox / flox) transgenic mice were crossed with Nestin?cre(Tg) transgenic mice, using Cre?LoxP recombination system, to generate LSD1 conditional knockout of neural stem cell ( LSD1?CKO) mice, LSD1(flox/ flox) Nestin?cre(Tg) mice, and LSD1(flox/ flox) mice as control. The neuron proliferation in LSD1?CKO mice was further detected by immunofluorescence staining. At the same time, the mood and memory?related behavior of LSD1?CKO mice were examined using several methods:sucrose preference test ( SPT) , forced swimming test ( FST) and novel?object recognition ( NOR) assay. Results In the LSD1 brain?specific CKO mice, the neuron proliferation rate in the hippocampus was significantly reduced ( P=0. 023 ) , the preference for sucrose was reduced ( P =0. 0075 ) , immobility duration during the forced swimming test was increased (P<0. 05), and LSD1?CKO mice also exhibits memory?decline (P=0. 0019) during the novel?object recognition test. Conclusions Depletion of LSD1 in mouse brain neural stem cells leads to significant reduction of the neuron proliferation in the hippocampus. LSD1?CKO mice show more negative emotions and memory impairment.