Mei CHEN, Dabing LI, Jianghui LI, et al. Chaihu Oral Liquid improves hippocampal neurogenesis and short-term memory defects in adult BTBR autism mice[J]. Journal of Army Medical University, 2022, 44(9): 874-881.
DOI:
Mei CHEN, Dabing LI, Jianghui LI, et al. Chaihu Oral Liquid improves hippocampal neurogenesis and short-term memory defects in adult BTBR autism mice[J]. Journal of Army Medical University, 2022, 44(9): 874-881. DOI: 10.16016/j.2097-0927.202110004.
Chaihu Oral Liquid improves hippocampal neurogenesis and short-term memory defects in adult BTBR autism mice
To investigate the effects of Chaihu Oral Liquid (CHOL) on the neurogenesis in hippocampal dentate gyrus (DG) and short-term memory defects in BTBR T
+
Itpr3
tf
/J (BTBR) autism model mice.
Methods
2
Healthy adult male C57BL/6J(C57) mice (7~8 weeks old
24.72±1.35 g) and BTBR mice (7~ 8 weeks old
27.7±1.42 g) were randomly divided into groups as follows (
n
=4 in each group): C57 control
C57 drug treatment
BTBR control
and BTBR drug treatment. Mice in the treatment groups
were given CHOL solution gavage (10 μL/g) once a day for 7 consecutive days
while those of the control group received equal volume of normal saline. Daily changes of body weight were recorded. After the last administration
hair grooming
bead embedding
new object recognition and open field experiments were conducted on the next day and lasted for 4 d. Finally
the samples of mice brain tissue were harvested
and immunofluorescence staining was performed to detect the NeuN
DCX
SOX2/GFAP labeled nerve cells in hippocampal DG.
Results
2
Behavioral results suggested that mice in the BTBR control group showed a more obvious preference for old objects in the new object recognition experiment (
P
<
0.01)
as compared with the C57 control group
while the new object recognition index was significantly improved in the BTBR drug treatment group (
P
<
0.05). Moreover
the BTBR control group presented more repetitive behavior and longer movement distance than the C57 control during the hair grooming
bead embedding and open field experiments
as well as higher body weight (
P
<
0.05)
whereas the BTBR treatment group had no significant changes in comparison with the BTBR control regarding these aspects. There were no notable differences between the C57 control and C57 treatment groups in terms of new object recognition index
repetitive behavior
motor ability and body weight. Immunofluorescence staining results indicated that the numbers of NeuN labeled mature neurons and DCX labeled newborn neurons in hippocampal DG were greatly decreased in the BTBR control group
so as the number of SOX/GFAP labeled neural progenitor cells (
P
<
0.01)
while the number of neurocytes was remarkably increased in the BTBR drug treatment group (
P
<
0.05). There were no significant differences in the numbers of NeuN
DCX and SOX2/GFAP labeled neurocytes between the C57 control and the C57 treatment groups.
Conclusion
2
CHOL promotes the generation of hippocampal DG nerve progenitor cells
new and mature neurons in adult BTBR mice
and improves the short-term learning and memory dysfunction.
关键词
Keywords
references
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