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Quantitative protein profiling of hippocampus during human aging
Benhong Xu1, Yanpan Gao1, Shaohua Zhan1
1National Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, China.
Neurobiology of Aging
|March 1, 2016
Summary
Aging significantly alters protein expression in the human hippocampus. Key pathways like the electron transport chain show downregulation, potentially impacting memory and cognitive functions with age.
Area of Science:
- Neuroscience
- Proteomics
- Aging Research
Background:
- The hippocampus is crucial for memory and learning.
- Age-related cognitive decline is a growing concern.
- Limited understanding of age-related protein changes in the human hippocampus.
Purpose of the Study:
- To investigate age-related changes in hippocampal protein expression.
- To identify specific proteins and pathways affected by normal aging.
Main Methods:
- Quantitative proteomic analysis using 4-plex tandem mass tag labeling.
- Postmortem human hippocampal samples from 16 subjects across four age groups.
- Verification of key proteins using quantitative Western blot.
Main Results:
- 35 proteins were upregulated, and 25 were downregulated with increasing age among 4582 analyzed proteins.
- Upregulated proteins include transgelin and vimentin; downregulated proteins are involved in electron transport and synaptic vesicle fusion.
- Proteins associated with Alzheimer's disease showed minimal age-related changes.
Conclusions:
- Significant alterations in the hippocampal proteome occur during normal human aging.
- Downregulation of energy metabolism and synaptic function proteins may underlie age-related hippocampal dysfunction.
- Findings provide insights into the molecular mechanisms of cognitive aging.
