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Screening of a neuronal cell model of tau pathology for therapeutic compounds.

Neurobiology of aging (2019-01-15)
Marcus Pickhardt, Michele Tassoni, Philip Denner, Birgit Kurkowsky, Ana Kitanovic, Christoph Möhl, Eugenio Fava, Eckhard Mandelkow

We have developed a cell-based phenotypic automated high-content screening approach for N2a cells expressing the pro-aggregant repeat domain of tau protein (tauRDΔK), which allows analysis of a chemogenomic library of 1649 compounds for their effect on the inhibition or stimulation of intracellular tau aggregation. We identified several inhibitors and stimulators of aggregation and achieved a screening reproducibility >85% for all data. We identified 18 potential inhibitors (= 1.1% of the library) and 10 stimulators (= 0.6% of the library) of tau aggregation in this cell model of tau pathology. The results provide insights into the regulation of cellular tau aggregation and the pathways involved in this process (e.g., involving signaling via p38 mitogen-activated protein kinase, histone deacetylases, vascular endothelial growth factor, rho/ROCK). For example, inhibitors of protein kinases (e.g., p38) can reduce tau aggregation, whereas inhibitors of deacetylases (histone deacetylases) can enhance aggregation. These observations are compatible with reports that phosphorylated or acetylated tau promotes pathology.

Product Number
Product Description

Formaldehyde solution, contains 10-15% methanol as stabilizer, 37 wt. % in H2O
Trypsin-EDTA solution, 1 ×, sterile; sterile-filtered, BioReagent, suitable for cell culture, 0.5 g porcine trypsin and 0.2 g EDTA • 4Na per liter of Hanks′ Balanced Salt Solution with phenol red
Thioflavine S, practical grade
Doxycycline hyclate
Dulbecco′s Phosphate Buffered Saline, Modified, without calcium chloride and magnesium chloride, liquid, sterile-filtered, suitable for cell culture
Resazurin sodium salt, powder, BioReagent, suitable for cell culture