Apolipoprotein E and Dendrite Recovery in Hippocampal Neurons
Author Information
Author(s): Maezawa Izumi, Zaja-Milatovic Snjezana, Milatovic Dejan, Stephen Christina, Sokal Izabela, Maeda Nobuyo, Montine Thomas J, Montine Kathleen S
Primary Institution: University of Washington
Hypothesis
Direct activation of CD14/TLR-4 in vivo would yield different amounts of paracrine damage to hippocampal sector CA1 pyramidal neurons in TR APOE mice.
Conclusion
The environment within TR APOE2 mouse hippocampus was most supportive of dendrite regeneration while that within TR APOE4 hippocampus failed to support dendrite regeneration.
Supporting Evidence
- TR APOE4 mice had significantly shorter dendrites at 6 weeks of age.
- Recovery of dendrite length was greater in TR APOE2 than TR APOE3 mice.
- TR APOE4 mice showed failure of dendrite regeneration after LPS exposure.
Takeaway
This study found that different versions of a protein called apolipoprotein E affect how well brain cells can recover after being damaged by the immune system.
Methodology
We measured changes in dendrite length in hippocampal CA1 neurons using Golgi staining and assessed neurite outgrowth of cultured primary neurons in response to astrocyte conditioned medium.
Potential Biases
Potential bias in the interpretation of results due to the specific genetic background of the mice used.
Limitations
The study used a specific mouse model, which may not fully represent human conditions.
Participant Demographics
All mice were female between 5 and 7 weeks of age.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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