1. Phenolic glycosides and flavonoids with antioxidant and anticancer activities from Desmodium caudatum .
- Author
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Xu QN, Zhu D, Wang GH, Lin T, Sun CL, Ding R, Tian WJ, and Chen HF
- Subjects
- Glycosides pharmacology, HeLa Cells, Humans, Phenols pharmacology, Plant Extracts pharmacology, Antioxidants pharmacology, Flavonoids pharmacology
- Abstract
Descaudatine A ( 1 ), an undescribed phenolic glycoside, along with a known analogue ( 2 ) and ten flavonoids ( 3-12 ), were isolated from the whole plant of Desmodium caudatum . Compounds 1 and 4 exhibited potent antioxidant activities with the IC
50 of 58.59 μM and 31.31 μM, respectively, which were approached to that of the positive control Vitamin C (IC50 = 46.32 μM). Meanwhile, 12 showed moderate antioxidant activity with the IC50 of 173.9 μM. Besides, compounds 3 and 6 inhibited the proliferation of HeLa cells with IC50 values of 56.14 μM and 69.04 μM, respectively. Further studies indicated that 3 and 6 could dose-dependently induce PARP cleavage and might trigger caspase-3, 8, 9 activation to induce apoptosis. RXRα is an ideal anticancer target of nuclear receptor. The reporter gene assay of RXRα indicated that 3 and 6 could inhibited the 9- cis -RA induced RXRα transcription in a concentration-dependent manner.- Published
- 2021
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