| First Author | Huang HX | Year | 2024 |
| Journal | J Neurochem | Volume | 168 |
| Issue | 7 | Pages | 1193-1214 |
| PubMed ID | 38372586 | Mgi Jnum | J:353929 |
| Mgi Id | MGI:7716553 | Doi | 10.1111/jnc.16042 |
| Citation | Huang HX, et al. (2024) Mass spectrometry imaging highlights dynamic patterns of lipid co-expression with Abeta plaques in mouse and human brains. J Neurochem 168(7):1193-1214 |
| abstractText | Lipids play crucial roles in the susceptibility and brain cellular responses to Alzheimer's disease (AD) and are increasingly considered potential soluble biomarkers in cerebrospinal fluid (CSF) and plasma. To delineate the pathological correlations of distinct lipid species, we conducted a comprehensive characterization of both spatially localized and global differences in brain lipid composition in App(NL-G-F) mice with spatial and bulk mass spectrometry lipidomic profiling, using human amyloid-expressing (h-Abeta) and WT mouse brains controls. We observed age-dependent increases in lysophospholipids, bis(monoacylglycerol) phosphates, and phosphatidylglycerols around Abeta plaques in App(NL-G-F) mice. Immunohistology-based co-localization identified associations between focal pro-inflammatory lipids, glial activation, and autophagic flux disruption. Likewise, in human donors with varying Braak stages, similar studies of cortical sections revealed co-expression of lysophospholipids and ceramides around Abeta plaques in AD (Braak stage V/VI) but not in earlier Braak stage controls. Our findings in mice provide evidence of temporally and spatially heterogeneous differences in lipid composition as local and global Abeta-related pathologies evolve. Observing similar lipidomic changes associated with pathological Abeta plaques in human AD tissue provides a foundation for understanding differences in CSF lipids with reported clinical stage or disease severity. |
