Effect of advanced maternal age on development of hippocampal neural stem cells in offspring rats
YANG Jing, HAN Wei, LIU Jie, YANG Chen, ZHAO Wen-Jie, SUN Hong, PAN Ya-Nan, CHEN Heng-Sheng, CHENG Li, JIANG Li
Department of Neurology, Children's Hospital of Chongqing Medical University/Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory Disorders, Chongqing 400014, China
Abstract Objective To study the effect of advanced maternal age (AMA) on the development of hippocampal neural stem cells in offspring rats. Methods Ten 3-month-old and ten 12-month-old female Sprague-Dawley rats were housed individually with 3-month-old male rats (1:1, n=20), whose offspring rats were assigned to a control group and an AMA group. A total of 40 rats were randomly selected from each group. Immunofluorescence assay and Western blot were used to localize and determine the levels of protein expression of Nestin and doublecortin (DCX) on day 7 as well as neuronal nuclear antigen (NeuN) and glial fibrillary acidic protein (GFAP) on day 28 (n=8 for each marker). Immunofluorescence assay was also used to localize the hippocampal expression of polysialylated isoforms of neural cell adhesion molecule (PSA-NCAM) on day 14 (n=8 for each marker). Results According to the Western blot results, the AMA group had significantly lower protein expression of DCX than the control group (P < 0.05), while there were no significant differences in the protein expression of Nestin, NeuN, and GFAP between the two groups (P > 0.05). According to the results of immunofluorescence assay, the AMA group had significantly lower protein expression of Nestin, DCX, and PSA-NCAM in the hippocampal dentate gyrus (DG) region than the control group (P < 0.05), while there were no significant differences in the above indices in the hippocampal CA1 and CA3 regions between the two groups (P > 0.05). The AMA group had significantly higher expression of NeuN in the hippocampal CA1 region than the control group (P < 0.01), while there were no significant differences in the expression of NeuN in the hippocampal DG and CA3 regions between the two groups (P > 0.05). The AMA group had significantly lower expression of GFAP in the hippocampal CA1, CA3, and DG regions than the control group (P < 0.05). Conclusions AMA may cause inhibition of proliferation, survival, and migration of hippocampal neural stem cells. AMA may also affect their differentiation into neurons and astrocytes, which will eventually lead to developmental disorders of hippocampal neural stem cells in offspring rats.
YANG Jing,HAN Wei,LIU Jie et al. Effect of advanced maternal age on development of hippocampal neural stem cells in offspring rats[J]. CJCP, 2020, 22(9): 1017-1026.
YANG Jing,HAN Wei,LIU Jie et al. Effect of advanced maternal age on development of hippocampal neural stem cells in offspring rats[J]. CJCP, 2020, 22(9): 1017-1026.
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