Abstract
The decreased efficiency of autophagic processing in the central nervous system during aging may be a contributing factor in neurodegenerative diseases. BAG3 (Bcl2 associated athanogene 3) is a major member of the BAG family of co-molecular chaperones that mediate selective macroautophagy. Therefore, we analyzed the expression and distribution of BAG3 in the brain at postnatal 0 day (P0), P15, 1-, 2-, 9-, 12-, and 18 month-old C57BL/6 mice, thus covering almost all ages. Except for a significant steep drop in mRNA and protein levels in the cortex and hippocampus soon after birth, there were minimal differences in the expression and distribution of BAG3 among P15, M1, M2, M9, and M12 mice; however, at 18 months, BAG3 expression was significantly higher. Immunohistochemical analyses showed that BAG3 is mainly located in the neuronal cytoplasm and processes in C57BL/6 the cerebral cortex and hippocampus from P0 to M18 postnatal development. These findings indicate that BAG3 might be stable in young and middle-aged mice, but unstable in aged mice.
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All original data in this study are available from the corresponding author on request.
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Acknowledgements
This work is supported by grants from the Natural Science Foundation of China (81471112, 81000468, 81771174, and 81601113). The authors would like to thank Editage (www.editage.com) for English editing.
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WZ and H-QW conceived and designed the study. X-LL, GL, T-TL, and NZ performed the experiments and data analyses. X-LL and HX drafted the manuscript. WZ finalized the article. All authors read and approved the manuscript.
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Li, X., Lin, G., Liu, T. et al. Postnatal development of BAG3 expression in mouse cerebral cortex and hippocampus. Brain Struct Funct 226, 2629–2650 (2021). https://doi.org/10.1007/s00429-021-02356-y
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DOI: https://doi.org/10.1007/s00429-021-02356-y