Flavonoid Glycosides from Hosta longipes, Their Inhibition on NO Production, and Nerve Growth Factor Inductive Effects
نویسندگان
چکیده
Investigação fitoquímica das folhas da Hosta longipes identificou um novo flavonóide glicosídeo, o caempferol-3-O-β-D-glucopiranosil-(1→2)-[6’’’-O-acetil-β-D-glucopiranósido]7-O-β-D-glucopiranósido, e mais cinco derivados flavonóides conhecidos. As estruturas de dois compostos foram reveladas por vários métodos de RMN (H e C RMN, H-H COSY, HMQC HMBC) e hidrólise química. Dados de RMN de um deles são publicados pela primeira vez. As atividades biológicas de seis compostos revelaram que cinco inibiram fortemente a produção de óxido nítrico (NO), com valores de IC50 de 11,56-15,97 μm em células BV-2 estimuladas por lipopolissacarídeo (LPS), sem toxicidade celular. Dois compostos mostraram indução moderada da secreção no fator de crescimento do nervo (NGF) em linhagem de células C6 de glioma (124,70 ± 7,71% e 117,02 ± 3,60%, respectivamente).
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