A highly sensitive quantitative method of polysialic acid reveals its unique changes in brain aging and neuropsychiatric disorders. - Hane, Masaya; Naramura, Ayane; Hayakawa, Kaito; Abe, Chikara; Nakagawa, Takahiro; Kushima, Itaru; Furukawa, Soma; Fukami, Yuki; Ikegami, Keisuke; Saigoh, Kazumasa; Kusunoki, Susumu; Katsuno, Masahisa; et al. (Scientific Reports, 2025)