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  1. Article ; Online: Evaluation of cytochrome P450-based drug metabolism in hemorrhagic shock rats that were transfused with native and an artificial red blood cell preparation, Hemoglobin-vesicles.

    Tokuno, Masahiro / Taguchi, Kazuaki / Sakai, Hiromi / Ohtsuki, Sumio / Yamasaki, Keishi / Otagiri, Masaki

    Drug metabolism and pharmacokinetics

    2020  Volume 35, Issue 5, Page(s) 417–424

    Abstract: Hemoglobin-vesicles (Hb-V) are being developed as red blood cell (RBC) substitutes. In this study ... we report on quantitative and qualitative alterations of hepatic cytochrome P450 (CYPs) and ... but not clinically significant effect on drug metabolism via CYPs in the liver due to decreased protein ...

    Abstract Hemoglobin-vesicles (Hb-V) are being developed as red blood cell (RBC) substitutes. In this study, we report on quantitative and qualitative alterations of hepatic cytochrome P450 (CYPs) and the pharmacokinetics of CYP-metabolizing drugs, with a focus on four CYP isoforms (CYP1A2, CYP2C11, CYP2E1 and CYP3A2), after Hb-V resuscitation from a massive hemorrhage. The results of proteome analysis and western blot data indicate that resuscitation with both Hb-V and packed RBC (PRBC) resulted in a decrease in the protein levels of CYPs. Along with a decrease in the protein expression of CYPs, pharmacokinetic studies showed that the elimination of CYP-metabolizing drugs was prolonged in the Hb-V and PRBC resuscitation groups. It is also noteworthy that the CYP-metabolizing drugs in the Hb-V resuscitation group was retained for a longer period compared to the PRBC resuscitation group, and this is attributed to the CYP isoforms having a lower metabolic activity in the Hb-V resuscitation group than that for the PRBC resuscitation group. These findings suggest that resuscitation with Hb-V after a massive hemorrhage has a slight but not clinically significant effect on drug metabolism via CYPs in the liver due to decreased protein levels and the metabolic activity with respect to the CYPs.
    MeSH term(s) Animals ; Caffeine/chemistry ; Caffeine/metabolism ; Chlorzoxazone/chemistry ; Chlorzoxazone/metabolism ; Cytochrome P-450 Enzyme System/chemistry ; Cytochrome P-450 Enzyme System/metabolism ; Drug Interactions ; Hemoglobins/chemistry ; Hemoglobins/metabolism ; Liposomes/chemistry ; Liposomes/metabolism ; Male ; Midazolam/chemistry ; Midazolam/metabolism ; Rats ; Rats, Sprague-Dawley ; Shock, Hemorrhagic/metabolism ; Tolbutamide/chemistry ; Tolbutamide/metabolism
    Chemical Substances Hemoglobins ; Liposomes ; Caffeine (3G6A5W338E) ; Cytochrome P-450 Enzyme System (9035-51-2) ; Tolbutamide (982XCM1FOI) ; Chlorzoxazone (H0DE420U8G) ; Midazolam (R60L0SM5BC)
    Keywords covid19
    Language English
    Publishing date 2020-06-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 2095748-8
    ISSN 1880-0920 ; 1347-4367 ; 0916-1139
    ISSN (online) 1880-0920
    ISSN 1347-4367 ; 0916-1139
    DOI 10.1016/j.dmpk.2020.06.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Evaluation of cytochrome P450-based drug metabolism in hemorrhagic shock rats that were transfused with native and an artificial red blood cell preparation, Hemoglobin-vesicles

    Tokuno, Masahiro / Taguchi, Kazuaki / Sakai, Hiromi / Ohtsuki, Sumio / Yamasaki, Keishi / Otagiri, Masaki

    Drug metab. pharmacokineti

    Abstract: Hemoglobin-vesicles (Hb-V) are being developed as red blood cell (RBC) substitutes. In this study ... we report on quantitative and qualitative alterations of hepatic cytochrome P450 (CYPs) and ... but not clinically significant effect on drug metabolism via CYPs in the liver due to decreased protein ...

    Abstract Hemoglobin-vesicles (Hb-V) are being developed as red blood cell (RBC) substitutes. In this study, we report on quantitative and qualitative alterations of hepatic cytochrome P450 (CYPs) and the pharmacokinetics of CYP-metabolizing drugs, with a focus on four CYP isoforms (CYP1A2, CYP2C11, CYP2E1 and CYP3A2), after Hb-V resuscitation from a massive hemorrhage. The results of proteome analysis and western blot data indicate that resuscitation with both Hb-V and packed RBC (PRBC) resulted in a decrease in the protein levels of CYPs. Along with a decrease in the protein expression of CYPs, pharmacokinetic studies showed that the elimination of CYP-metabolizing drugs was prolonged in the Hb-V and PRBC resuscitation groups. It is also noteworthy that the CYP-metabolizing drugs in the Hb-V resuscitation group was retained for a longer period compared to the PRBC resuscitation group, and this is attributed to the CYP isoforms having a lower metabolic activity in the Hb-V resuscitation group than that for the PRBC resuscitation group. These findings suggest that resuscitation with Hb-V after a massive hemorrhage has a slight but not clinically significant effect on drug metabolism via CYPs in the liver due to decreased protein levels and the metabolic activity with respect to the CYPs.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #624483
    Database COVID19

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