Cited by 57Drug Transport and Resistance MechanismsPlant-derived Lignans Synthesis and BioactivityAntibiotic Resistance in Bacteria

Schisandrol A from Schisandra chinensis Reverses P-Glycoprotein-Mediated Multidrug Resistance by Affecting Pgp-Substrate Complexes

Fong, Wang-Fun, Wan, Chi-Keung, Zhu, Guo-Yuan, Chattopadhyay, Apurba, Dey, Saibal, Zhao, Zhongzhen, Shen, Xiao-Ling·2007·Planta Medica

Abstract

Recent studies have shown that dibenzocyclooctadiene lignans may reverse P-glycoprotein-mediated multidrug resistance (Pgp-MDR) in cancer cells; however, the mechanism of action remains unknown. Through screening of herbs, we found that schisandrol A (SCH) isolated from Fructus Schisandrae (the dried fruit of Schisandra chinensis (Turcz.) Baill.) sensitized Pgp-MDR HepG2-DR cells by interfering with the function of Pgp-substrate complexes. In Pgp-MDR cells, SCH enhanced the cytotoxicity of cancer drugs that are Pgp substrates and restored vinblastine-induced G2/M arrest without lowering Pgp expression. SCH increased cellular retention of Pgp substrates such as rhodamine 123. In Pgp-overexpressing membrane preparations, SCH stimulated basal Pgp-ATPase thus showing some substrate-like function. However, SCH was not a competitive inhibitor for verapamil or progesterone and decreased their Km. In the presence of substrates, SCH decreased the reactivity between Pgp and the monoclonal antibody UIC-2 which is normally increased with active substrate-Pgp complexes. The labeling of active Pgp transport sites by [125I]-iodoarylazidoprazosin was partially blocked by SCH. SCH did not affect the activity of the mutant Pgp F983A suggesting that SCH acted differently than the thioxanthene type of Pgp allosteric inhibitors. Our results suggest that SCH acts by affecting the normal formation and functioning of the Pgp-substrate complexes.

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Crossref · 10.1055/s-2007-967120

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  • Several studies reported that some lignans (gomisin A, gomisin G, schizandrin, and schisanhenol) possess antitumor bioactivities.

    “Several studies reported that some lignans (gomisin A, gomisin G, schizandrin, and schisanhenol) possess antitumor bioactivities [94,95,96,97,98].”

    From Plant Adaptogens—History and Future Perspectives (2021) · cites this paper as [96]

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Authors
Fong, W.-F., Wan, C.-K., Zhu, G.-Y., Chattopadhyay, A., Dey, S., Zhao, Z., & Shen, X.-L.
Affiliations
  • Hong Kong Baptist University (HK)
  • City University of Hong Kong (HK)
  • Uniformed Services University of the Health Sciences (US)
Venue
Planta Medica
Published
2007-03
Volume
73
Issue
3
Pages
212-220
ISSN
  • 0032-0943 (ISSN-L)
  • 1439-0221
OpenAlex
W2085869499
Cited by
57
References
0
Citations by year
2026: 1 · 2025: 1 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 3 · 2013: 4 · 2012: 4
FWCI
2.52
Type
journal article
Language
en
Open access
closed
Locations
  • Planta Medica (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of General Medical Sciences (GM067926, R01GM067926)
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant-derived Lignans Synthesis and Bioactivity
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Antibiotic Resistance in Bacteria
Keywords
schisandrol A, Schisandra chinensis, multidrug resistance reversal, P-glycoprotein, dibenzocyclooctadiene lignans, Fructus Schisandrae, vinblastine, G2/M cell cycle arrest, allosteric inhibition, drug efflux, HepG2 cells
MeSH terms
Antineoplastic Agents, Phytogenic, Cell Survival, Flow Cytometry, Fruit, Humans, Phytotherapy, Plant Extracts, Blotting, Western, Lignans, Drug Resistance, Multiple, Drug Resistance, Neoplasm, Inhibitory Concentration 50, Reverse Transcriptase Polymerase Chain Reaction, ATP Binding Cassette Transporter, Subfamily B, Member 1, ATP-Binding Cassette, Sub-Family C Proteins, Schisandra, Cyclooctanes, Cell Line, Tumor

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