Four organosulfur compounds from the seeds of Capsella bursa-pastoris and their anti-inflammatory activities

Nat Prod Res. 2023 Aug-Sep;37(16):2688-2696. doi: 10.1080/14786419.2022.2130307. Epub 2022 Oct 6.

Abstract

Phytochemical investigation of the seeds of Capsella bursa-pastoris led to the isolation of four organosulfur compounds. There were two new compounds, 10-methylsulfinyl-decanamide (1) and 11-methylsulfinyl-undecanamide (2), along with two known compounds (3 - 4), which all have a sulfoxide group and an amide or a nitrile group. Their chemical structures were elucidated by analysing UV, IR, ESI-MS and NMR spectroscopy. In addition, compounds 1 - 4 were evaluated for their anti-inflammatory activities by using LPS-induced RAW 264.7 cells. Compounds 1 - 4 exhibited potential anti-inflammatory activities on NO release characterised by decreasing the mRNA expression levels of inducible NO synthase (iNOS), cytokines cyclooxygenase-2 (COX-2) and interleukin 6 (IL-6).

Keywords: Capsella bursa-pastoris; NMR spectroscopy; anti-inflammatory activity; organosulfur compounds; sulfoxide.