NO inhibitory constituents as potential anti-neuroinflammatory agents for AD from Blumea balsamifera

• Published in: Bioorganic chemistry Vol. 76; pp. 449 - 457
• Main Authors: Ma, Jun, Ren, Quanhui, Dong, Bangjian, Shi, Zhaoyu, Zhang, Jie, Jin, Da-Qing, Xu, Jing, Ohizumi, Yasushi, Lee, Dongho, Guo, Yuanqiang
• Format: Journal Article
• Language: English
• Published: SAN DIEGO Elsevier Inc 01.02.2018; Elsevier
• Subjects: Animals; Anti-Inflammatory Agents, Non-Steroidal - chemistry; Anti-Inflammatory Agents, Non-Steroidal - isolation & purification; Anti-Inflammatory Agents, Non-Steroidal - pharmacology; Asteraceae - chemistry; Biochemistry & Molecular Biology; Blumea balsamifera; Cell Line; Chemistry; Chemistry, Organic; Diterpenoids; Life Sciences & Biomedicine; Mice; Microglia - drug effects; Molecular docking; Molecular Docking Simulation; Molecular Structure; Neuroprotective Agents - chemistry; Neuroprotective Agents - isolation & purification; Neuroprotective Agents - pharmacology; Nitric Oxide - antagonists & inhibitors; Nitric Oxide Synthase Type II - chemistry; NO inhibitory activities; Physical Sciences; Plant Components, Aerial - chemistry; Science & Technology; Sesquiterpenoids; Terpenes - chemistry; Terpenes - isolation & purification; Terpenes - pharmacology; Diterpenoids; NO inhibitory activities; Blumea balsamifera; Sesquiterpenoids; Molecular docking; CELLS; METABOLITES; TRITERPENOIDS; ALZHEIMERS-DISEASE; FLAVONOIDS; ANTICANCER ACTIVITIES; INOS PROTEIN; EXTRACTS; EPIDEMIOLOGY
• ISSN: 0045-2068; 1090-2120
• DOI: 10.1016/j.bioorg.2017.12.008

[Display omitted] •Four new terpenoids were isolated from Blumea balsamifera.•The structures were elucidated by NMR data and ECD calculations.•All of the compounds showed NO inhibitory effects.•Molecular docking revealed interactions of the isolates with the iNOS protein. Our continuous search for new nitric oxide (NO) inhibitory substances as anti-neuroinflammatory agents for AD resulted in the isolation of one new labdane diterpenoid and three new guaiane sesquiterpenoids, as well as ten known compounds from Blumea balsamifera. Their structures were elucidated by NMR spectroscopic data analysis and the time-dependent density functional theory (TDDFT) electronic circular dichroism (ECD) calculations. The anti-neuroinflammatory effects were examined by inhibiting NO release in LPS-induced murine microglial BV-2 cells. The possible mechanism of NO inhibition of some bioactive compounds was also investigated using molecular docking, which revealed the interactions of bioactive compounds with the iNOS protein.