2. Academic Validation
  3. Polyoxypregnane steroids from the stems of Marsdenia tenacissima

Polyoxypregnane steroids from the stems of Marsdenia tenacissima

  • J Nat Prod. 2014 Sep 26;77(9):2044-53. doi: 10.1021/np500385b.
Sheng Yao 1,  Kenneth Kin-Wah To,  Ya-Zhou Wang,  Chun Yin,  Chunping Tang,  Stella Chai,  Chang-Qiang Ke,  Ge Lin,  Yang Ye
Affiliations

Affiliation

  • 1 State Key Laboratory of Drug Research and Natural Products Chemistry Department, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu-Chong-Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People's Republic of China.
PMID: 25215856 DOI: 10.1021/np500385b
Abstract

A new polyoxypregnane aglycone, tenacigenin D (1), and seven new C21 steroid glycosides, tenacissimosides D-J (2-8), were isolated from the stems of Marsdenia tenacissima. Their structures were determined by interpretation of their 1D and 2D NMR and other spectroscopic data, as well as by comparison with published values for related known compounds. Compound 1 was found to circumvent P-glycoprotein (P-gp)-mediated multidrug resistance through an inhibitory effect on P-gp with a similar potency to verapamil. In addition, compound 1 potentiated the activity of erlotinib and gefitinib in epidermal growth factor receptor tyrosine kinase inhibitor (EGFR TKI)-resistant non-small-cell lung Cancer cells.

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