Catalpol and tetramethylpyrazine relieve Alzheimer's disease by facilitating AQP4 protein expression and polarized distribution in hippocampal astrocytes via inducing the STAT3-mediated UCHL1 expression - Chujun Deng; Mengting Zhu; Jing Yuan; Tianxiang Yin; Huize Chen; Shengxi Meng (Naunyn-Schmiedeberg's Archives of Pharmacology, 2026)