Publications by authors named "Alina Sigalov"
Article Synopsis
- Single-nucleus transcriptomic studies have identified specific glial cell states linked to Alzheimer's disease but lack context from the actual structure of the human neocortex.
- This study used an unbiased analytic strategy to analyze spatially-registered transcriptomic data, finding that certain genes, including metallothioneins, are altered near amyloid plaques.
- Validation through immunofluorescence showed that a reactive astrocyte subtype, Ast.5, is involved in the environment around these plaques, indicating its potential role in the disease process.
Article Synopsis
- Researchers created a comprehensive cell atlas of the aging brain by analyzing 1.65 million single-nucleus RNA sequences from older adults, revealing specific cell types linked to Alzheimer’s disease (AD).
- They discovered two distinct microglial subpopulations involved in the progression of amyloid-β and tau proteinopathies, as well as an astrocyte subpopulation linked to cognitive decline.
- Using a new methodology called BEYOND, the study identified two different pathways of brain aging, which helps in developing personalized therapies targeting specific cellular communities related to AD and other forms of brain aging.
Microglia and neuroinflammation play an important role in the development and progression of Alzheimer's disease (AD). Inositol polyphosphate-5-phosphatase D (INPP5D/SHIP1) is a myeloid-expressed gene genetically-associated with AD. Through unbiased analyses of RNA and protein profiles in INPP5D-disrupted iPSC-derived human microglia, we find that reduction in INPP5D activity is associated with molecular profiles consistent with disrupted autophagy and inflammasome activation.
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