title: Hepato-protective effects of six schisandra lignans on acetaminophen-induced liver injury are partially associated with the inhibition of CYP-mediated bioactivation.
abstract: Acetaminophen (APAP) overdose is the most frequent cause of drug-induced acute liver failure. Schisandra fructus is widely-used traditional Chinese medicine which possesses hepato-protective potential. Schisandrin A (SinA), Schisandrin B (SinB), Schisandrin C (SinC), Schisandrol A (SolA), Schisandrol B (SolB), and Schisantherin A (SthA) are the major bioactive lignans. Most recently, we found SolB exerts significant hepato-protection against APAP-induced liver injury. In this study, the protective effects of the other five schisandra lignans against APAP-induced acute hepatotoxicity in mice were investigated and compared with that of SolB. The results of morphological and biochemical assessment clearly demonstrated significant protective effects of SinA, SinB, SinC, SolA, SolB, and SthA against APAP-induced liver injury. Among these schisandra lignans, SinC and SolB exerted the strongest hepato-protective effects against APAP-induced hepatotoxicity. Six lignans pretreatment before APAP dosing could prevent the depletions of total liver glutathione (GSH) and mitochondrial GSH caused by APAP. Additionally, the lignans treatment inhibited the enzymatic activities of three CYP450 isoforms (CYP2E1, CYP1A2, and CYP3A11) related to APAP bioactivation, and further decreased the formation of APAP toxic intermediate N-acetyl-p-benzoquinone imine (NAPQI) in mouse microsomal incubation system. This study demonstrated that SinA, SinB, SinC, SolA, SolB and SthA exhibited significant protective actions toward APAP-induced liver injury, which was partially associated with the inhibition of CYP-mediated APAP bioactivation.
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Fan
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
authors.forename: Huasen
authors.initials: H
authors.lastname: Tan
authors.affiliation: The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
authors.forename: Pan
authors.initials: P
authors.lastname: Chen
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
authors.forename: Hang
authors.initials: H
authors.lastname: Zeng
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China. Electronic address: huangmin@mail.sysu.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Huang
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China. Electronic address: bihchang@mail.sysu.edu.cn.
authors.forename: Huichang
authors.initials: H
authors.lastname: Bi
mesh_terms: D000082:Acetaminophen / Q000633:toxicity*; D018712:Analgesics, Non-Narcotic / Q000633:toxicity*; D000818:Animals; D056486:Chemical and Drug Induced Liver Injury / Q000378:metabolism / Q000517:prevention & control*; D034242:Cyclooctanes / Q000627:therapeutic use*; D019388:Cytochrome P-450 CYP1A2 / Q000378:metabolism; D019392:Cytochrome P-450 CYP2E1 / Q000378:metabolism; D051544:Cytochrome P-450 CYP3A / Q000378:metabolism; D004149:Dioxoles / Q000627:therapeutic use*; D017705:Lignans / Q000627:therapeutic use*; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000378:metabolism; D008810:Mice, Inbred C57BL; D011083:Polycyclic Compounds / Q000627:therapeutic use*; D020011:Protective Agents / Q000627:therapeutic use*; D032141:Schisandra / Q000737:chemistry
chemical_list: D018712:Analgesics, Non-Narcotic; D034242:Cyclooctanes; D004149:Dioxoles; D017705:Lignans; D008565:Membrane Proteins; D011083:Polycyclic Compounds; D020011:Protective Agents; C520474:schisandrol A; C015499:schizandrin B; D000082:Acetaminophen; C033585:schizandrol B; C034734:schizandrin A; C034557:schizandrer A; C031409:schizandrin C; D019392:Cytochrome P-450 CYP2E1; C496508:Cyp3a11 protein, mouse; D019388:Cytochrome P-450 CYP1A2; D051544:Cytochrome P-450 CYP3A
keywords: Acetaminophen; Bioactivation; Hepato-protective effect; Liver injury; Schisandra lignan