Structures and Anti-Inflammatory Evaluation of Phenylpropanoid Derivatives from the Aerial Parts of Dioscorea polystachya.

ABSTRACT: Seven undescribed phenylpropanoid constituents, including three new bibenzyl derivatives (1-3) along with four new benzofuran stilbene derivatives (4-7), were isolated from the aerial parts of Dioscorea polystachya. The structures of these compounds were elucidated using a combination of spectroscopic analyses, including UV, IR, HRESIMS, 1D, and 2D NMR. Further, all the compounds were evaluated on the anti-inflammatory activity for their inhibition of nitric oxide (NO) production by RAW 264.7 macrophages cells, and some of them (1-3 and 6) displayed inhibitory activity with IC₅₀ values in the range of 9.3-32.3 μM. Moreover, compound 3 decreased the expression of iNOS in Western blot analysis, suggesting compound 3 is mediated via the suppression of an LPS-induced NF-κB inflammasome pathway.

SUBMITTER: Cai B 

PROVIDER: S-EPMC9502174 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature