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Integrated Proteomics and Metabolomics Analysis in Hippocampus of Rats With T2DM-Associated Cognitive Decline
Ying Zhang1, Jiale Yu1, Dongmei Su1
1NHC Key Laboratory of Reproductive Health Engineering Technology Research, National Research Institute for Family Planning, Beijing, China.
Summary
Type 2 diabetes causes cognitive decline by altering brain metabolism. This study found the pentose phosphate pathway and ABC transporters are activated in the hippocampus, disrupting synaptic function and causing neuroinflammation.
Area of Science:
- Neuroscience
- Metabolomics
- Proteomics
Background:
- Type 2 diabetes mellitus (T2DM) is a prevalent chronic condition.
- Cognitive decline is a significant complication of T2DM, with unclear molecular mechanisms.
Purpose of the Study:
- To investigate molecular alterations in the hippocampus of T2DM rats using metabolomics and proteomics.
- To elucidate the mechanisms underlying T2DM-related cognitive dysfunction.
Main Methods:
- Combined metabolomics and proteomics analysis in T2DM rat hippocampus.
- KEGG Markup Language (KGML) network analysis to integrate metabolite and protein data.
- Gene Ontology (GO) and KEGG pathway analyses to identify affected biological processes and pathways.
Main Results:
- Identified 58 differentially expressed metabolites and 61 differentially expressed proteins.
- Proteomic analysis revealed alterations in cytoskeleton organization and actin-related processes.
- Metabolomic and pathway analyses highlighted the pentose phosphate pathway (PPP) and ABC transporters as significantly activated.
- Up-regulation of Rpia (PPP indicator) and Tap1 (immune-function ABC transporter) was observed.
Conclusions:
- Activated PPP and ABC transporters in the T2DM hippocampus disrupt synaptic transmission and promote neuroinflammation.
- These findings offer insights into T2DM-related cognitive dysfunction mechanisms.
- Potential therapeutic targets for neuroprotection against cognitive decline in T2DM may be identified.
