Neurodegeneration: 10 AD models quantified GFAP expression (WB, IHC, or IF) as a marker of astrocyte activation (Liu et al., 2020; Syeda et al., 2018; Cuervo-Zanatta et al., 2023; Wang et al., 2019, 2024; Pan et al., 2022; Qian et al., 2023; Qu et al., 2022; Giridharan et al., 2023; Kim et al., 2020). The gene discussed is GFAP; the disease is Alzheimer disease.