Postnatal development of BAG3 expression in mouse cerebral cortex and hippocampus

Area of Science:

• Neuroscience
• Molecular Biology
• Cellular Biology

Background:

• Autophagic processing declines in the aging central nervous system, potentially contributing to neurodegenerative diseases.
• BAG3 (Bcl2 associated athanogene 3) is a key co-molecular chaperone involved in selective macroautophagy.

Purpose of the Study:

• To investigate the expression and distribution of BAG3 in the brain across various developmental and aging stages in C57BL/6 mice.

Main Methods:

• Analysis of BAG3 mRNA and protein levels.
• Immunohistochemical examination of BAG3 distribution in the cerebral cortex and hippocampus.

Main Results:

• BAG3 mRNA and protein levels dropped significantly after birth (P0) but remained relatively stable from P15 to 12 months.
• A significant increase in BAG3 expression was observed in 18-month-old mice.
• Immunohistochemistry revealed BAG3 is primarily localized in neuronal cytoplasm and processes throughout postnatal development.

Conclusions:

• BAG3 expression is stable in young and middle-aged mice but becomes unstable in aged mice.
• The altered expression pattern of BAG3 in aging mice may have implications for neurodegenerative disease research.