Eclipta prostrata (L.) L. is a medicinal plant of the Asteraceae family, and several extracts and isolated compounds of E. prostrata (L.) L. showed a wide range of biological activities such as antimicrobial, anticancer, hepatoprotective, neuroprotective, hair growth promoting activities, and more recently against covid-19. Eclipta prostrata (L.) L. hairy roots produce wedelolactone (WL), demethylwedelolactone (DWL) and 3,5-di- O -caffeoylquinic acid (3,5-diCQA), and there is no data in literature regarding biosynthetic pathways are involved. To verify the biosynthetic route, feeding experiments were carried out using sodium [2- 13 C]acetate, [3- 13 C] dl -phenylalanine, and 13 C-labeled compounds (WL, DWL and 3,5-diCQA) were detected by ultra-high-performance liquid chromatography-quadrupole time of flight mass spectrometry (HPLC-QTOF-MS). Analysis showed that the metabolic pathways operative of coumestans (WL and DWL) are derived from acetate and shikimate pathways, while that the phenylpropanoid (3,5-diCQA) biosynthesis is exclusively from shikimate pathway. Supplementary Information The online version contains supplementary material available at 10.1007/s11240-022-02342-0.
Eclipta prostrata (L.) L. is a medicinal plant of the Asteraceae family, and several extracts and isolated compounds of Eclipta prostrata (L.) L. showed a wide range of biological activities such as antimicrobial, anticancer, hepatoprotective, neuroprotective, hair growth promoting activities, and more recently against covid-19. Eclipta prostrata (L.) L. hairy roots produce wedelolactone (WL), demethylwedelolactone (DWL) and 3,5-di-O-caffeoylquinic acid (3,5-diCQA), and there is no data in literature regarding biosynthetic pathways are involved. To verify the biosynthetic route, feeding experiments were carried out using sodium [2-13C]acetate, [3-13C]DL-phenylalanine, and 13C-labeled compounds (WL, DWL and 3,5-diCQA) were detected by ultra-high-performance liquid chromatography-quadrupole time of flight mass spectrometry (HPLC-QTOF-MS). Analysis showed that the metabolic pathways operative of coumestans (WL and DWL) are derived from acetate and shikimate pathways, while that the phenylpropanoid (3,5-CQA) biosynthesis is exclusively from shikimate pathway.
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