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Changes in Disposition of Ezetimibe and Its Active Metabolites Induced by Impaired Hepatic Function: The Influence of Enzyme and Transporter Activities. Pharmaceutics 2022; 14:pharmaceutics14122743. [PMID: 36559237 PMCID: PMC9785202 DOI: 10.3390/pharmaceutics14122743] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
Ezetimibe (EZE) is a selective cholesterol absorption inhibitor. Hepatic impairment significantly increases the systemic exposure of EZE and its main active phenolic glucuronide, EZE-Ph. Although changes in efflux transporter activity partly explain the changes in EZE-Ph pharmacokinetics, the causes of the changes to EZE and the effects of the administration route on EZE-Ph remain unclear. A carbon tetrachloride (CCl4)-induced hepatic failure rat model was combined with in vitro experiments to explore altered EZE and EZE-Ph disposition caused by hepatic impairment. The plasma exposure of EZE and EZE-Ph increased by 11.1- and 4.4-fold in CCl4-induced rats following an oral administration of 10 mg/kg EZE, and by 2.1- and 16.4-fold after an intravenous injection. The conversion of EZE to EZE-Ph decreased concentration-dependently in CCl4-induced rat liver S9 fractions, but no change was observed in the intestinal metabolism. EZE-Ph was a substrate for multiple efflux and uptake transporters, unlike EZE. In contrast to efflux transporters, no difference was seen in the hepatic uptake of EZE-Ph between control and CCl4-induced rats. However, bile acids that accumulated due to liver injury inhibited the uptake of EZE-Ph by organic anion transporting polypeptides (OATPs) (glycochenodeoxycholic acid and taurochenodeoxycholic acid had IC50 values of 15.1 and 7.94 μM in OATP1B3-overexpressed cells). In conclusion, the increased plasma exposure of the parent drug EZE during hepatic dysfunction was attributed to decreased hepatic glucuronide conjugation, whereas the increased exposure of the metabolite EZE-Ph was mainly related to transporter activity, particularly the inhibitory effects of bile acids on OATPs after oral administration.
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Extrahepatic Drug Transporters in Liver Failure: Focus on Kidney and Gastrointestinal Tract. Int J Mol Sci 2020; 21:ijms21165737. [PMID: 32785140 PMCID: PMC7461118 DOI: 10.3390/ijms21165737] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/02/2020] [Accepted: 08/05/2020] [Indexed: 02/07/2023] Open
Abstract
Emerging information suggests that liver pathological states may affect the expression and function of membrane transporters in the gastrointestinal tract and the kidney. Altered status of the transporters could affect drug as well as endogenous compounds handling with subsequent clinical consequences. It seems that changes in intestinal and kidney transporter functions provide the compensatory activity of eliminating endogenous compounds (e.g., bile acids) generated and accumulated due to liver dysfunction. A literature search was conducted on the Ovid and PubMed databases to select relevant in vitro, animal and human studies that have reported expression, protein abundance and function of the gastrointestinal and kidney operating ABC (ATP-binding cassette) transporters and SLC (solute carriers) carriers. The accumulated data suggest that liver failure-associated transporter alterations in the gastrointestinal tract and kidney may affect drug pharmacokinetics. The altered status of drug transporters in those organs in liver dysfunction conditions may provide compensatory activity in handling endogenous compounds, affecting local drug actions as well as drug pharmacokinetics.
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Liu H, Chen M, Yin H, Hu P, Wang Y, Liu F, Tian X, Huang C. Exploration of the hepatoprotective chemical base of an orally administered herbal formulation (YCHT) in normal and CCl 4-intoxicated liver injury rats. Part 1: Metabolic profiles from the liver-centric perspective. JOURNAL OF ETHNOPHARMACOLOGY 2019; 237:81-91. [PMID: 30904705 DOI: 10.1016/j.jep.2019.03.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/27/2019] [Accepted: 03/17/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Yin-Chen-Hao Tang (YCHT), derived from "Treatise on Febrile Diseases" in ancient China, has been a very popular hepatoprotective three-herb formula in China and Japan, although its chemical base remains unclear. AIM OF THIS STUDY As the first step in revealing the hepatoprotective chemical base of YCHT, we aimed to clarify the absorbed ingredients and associated metabolic pathways for orally dosed YCHT in both normal and liver injury rats from a liver-centric perspective. MATERIALS AND METHODS With the aid of 10 reference compounds, the absorbed ingredients and generated metabolites were systematically characterized by high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (HPLC-Q-TOF) in the portal vein plasma (the plasma before hepatic disposition) - liver - systemic plasma (the plasma after hepatic disposition), following oral administration of YCHT in normal and CCl4-induced liver injury rats. RESULTS A total of 38 compounds with six chemical structures, consisting of 10 prototypes and 28 metabolites generated through 9 biotransformations, were absolutely or tentatively identified, and 25 compounds were first reported on YCHT treatments. Among them, 8 compounds were absolutely confirmed by comparing with standard substances, and some had published hepatoprotective activities. Compared with the 35, 15, and 29 compounds identified in the portal vein plasma, liver, and systemic plasma of normal rats, respectively, the corresponding numbers of characterized compounds were 37, 13 and 29 in the liver injury rats. CONCLUSIONS Sulfation and glucuronidation were the predominant biotransformations, and intestinal metabolism, prior to hepatic metabolism, occurred for most compounds. CCl4-induced liver injury caused only slight changes in the metabolic profiles of rats orally administered YCHT. These results provided the precondition for further quantitative analysis and pharmacodynamic screening of compounds in YCHT.
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Affiliation(s)
- Huan Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingcang Chen
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hao Yin
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pei Hu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yangyang Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fang Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoting Tian
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Chenggang Huang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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Tian X, Liu H, Qiao S, Yin H, Chen M, Hu P, Wang Y, Peng H, Liu F, Pan G, Huang C. Exploration of the hepatoprotective chemical base of an orally administered herbal formulation (YCHT) in normal and CCl 4-intoxicated liver injury rats. Part 2: Hepatic disposition in vivo and hepatoprotective activity in vitro. JOURNAL OF ETHNOPHARMACOLOGY 2019; 236:161-172. [PMID: 30802610 DOI: 10.1016/j.jep.2019.02.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 01/27/2019] [Accepted: 02/11/2019] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Yin-Chen-Hao Tang (YCHT) has been a very popular, hepatoprotective three-herb formula with an unclear chemical base. AIM OF THIS STUDY To reveal the hepatoprotective chemical base of oral-dosed YCHT, we bridged the hepatic disposition of six compounds in vivo and their hepatoprotection in vitro. MATERIALS AND METHODS In vivo, following the oral administration of YCHT in normal and CCl4-induced liver injury rats, the determinations of chlorogenic acid, 4-hydroxyacetophenone, geniposide, genipin, rhein and emodin were conducted in the portal vein plasma, the liver, and the systemic plasma. In vitro, the hepatoprotective activities of these compounds were determined in the CCl4-induced HepG2 cells. RESULTS Consistent with the highest content in YCHT, geniposide had the highest exposure in vivo. Inconsistent with the negligible content, rhein, 4-hydroxyacetophenone, emodin and genipin showed substantial hepatic accumulations. In contrast, chlorogenic acid, an ingredient that has a high content in YCHT, elicited no hepatic exposure. In normal rats, the hepatic disposition prevented the compounds entering into the systemic plasma from the portal vein plasma by 44.9-100%, except for rhein. CCl4-induced liver injury caused a decreased hepatic exposure of 4-hydroxyacetophenone, rhein and emodin by 50%. In vitro, all six compounds exerted the hepatoprotection by increasing cell viability, decreasing hepatic marker enzymes and inhibiting lipid peroxidation at varying levels. CONCLUSION Geniposide, rhein, emodin, 4-hydroxyacetophenone and genipin directly resisted liver injury in oral-dosed YCHT, while chlorogenic acid likely played an indirect role. This study proved that YCHT exerted hepatoprotection through multiple components and multiple actions. However, close attention should be paid to the possible side effects and oral dosage of YCHT in clinics.
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Affiliation(s)
- Xiaoting Tian
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huan Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shida Qiao
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Yin
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mingcang Chen
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pei Hu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yangyang Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huige Peng
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guoyu Pan
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Chenggang Huang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Hai Ke Road Zhangjiang, Pudong, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Padowski JM, Pollack GM. Influence of enterohepatic recycling on the time course of brain-to-blood partitioning of valproic acid in rats. Drug Metab Dispos 2012; 40:1846-53. [PMID: 22715475 DOI: 10.1124/dmd.112.045500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
A widely used metric of substrate exposure in brain is the brain-to-serum partition coefficient (K(p,brain); C(brain)/C(serum)), most appropriately determined at distribution equilibrium between brain tissue and serum. In some cases, C(brain)/C(serum) can peak and then decrease, as opposed to monotonically increasing to a plateau, precluding accurate estimation of partitioning. This "overshoot" has been observed with compounds that undergo enterohepatic recycling (ER), such as valproic acid (VPA). Previous simulation experiments identified a relationship between overshoot in the C(brain)/C(serum) versus time profile and distribution into a peripheral "compartment" (e.g., the ER loop). This study was conducted to evaluate model predictions of that relationship. Initial experiments tested the ability of activated charcoal, antibiotics, or Mrp2 deficiency to impair VPA ER in rats, thereby limiting the apparent volume of distribution associated with ER. Mrp2 deficiency (significantly) and antibiotics (moderately) interrupted VPA ER. Subsequently, brain partitioning was evaluated in the presence versus absence of ER modulation. Although overshoot was not eliminated completely, deconvolution revealed that overshoot was reduced in Mrp2-deficient and antibiotic-treated rats. Consistent with model predictions, overshoot was higher after antibiotic treatment (moderate ER interruption) than in Mrp2 deficiency (substantial ER interruption). Steady-state K(p,brain) was unaffected by experimental manipulation, also consistent with model predictions. These data support the hypothesis that C(brain)/C(serum) may overshoot K(p,brain) based on the extent of peripheral sequestration. Consideration of this information, particularly for compounds that undergo significant extravascular distribution, may be necessary to avoid erroneous estimation of K(p,brain).
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Affiliation(s)
- Jeannie M Padowski
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Kundu R, Dasgupta S, Biswas A, Bhattacharya S, Pal BC, Bhattacharya S, Rao P, Barua N, Bordoloi M, Bhattacharya S. Carlinoside reduces hepatic bilirubin accumulation by stimulating bilirubin-UGT activity through Nrf2 gene expression. Biochem Pharmacol 2011; 82:1186-97. [DOI: 10.1016/j.bcp.2011.07.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 06/12/2011] [Accepted: 07/07/2011] [Indexed: 01/21/2023]
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Nagata M, Hidaka Y, Hatakeyama K, Kawano Y, Iwakiri T, Okumura M, Arimori K. Hepatic fibrosis does not affect the pharmacokinetics of 5-fluorouracil in rats. Biopharm Drug Dispos 2010; 32:126-30. [DOI: 10.1002/bdd.744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 10/27/2010] [Accepted: 11/28/2010] [Indexed: 11/10/2022]
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Gu X, Manautou JE. Regulation of hepatic ABCC transporters by xenobiotics and in disease states. Drug Metab Rev 2010; 42:482-538. [PMID: 20233023 DOI: 10.3109/03602531003654915] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The subfamily of ABCC transporters consists of 13 members in mammals, including the multidrug resistance-associated proteins (MRPs), sulfonylurea receptors (SURs), and the cystic fibrosis transmembrane conductance regulator (CFTR). These proteins play roles in chemical detoxification, disposition, and normal cell physiology. ABCC transporters are expressed differentially in the liver and are regulated at the transcription and translation level. Their expression and function are also controlled by post-translational modification and membrane-trafficking events. These processes are tightly regulated. Information about alterations in the expression of hepatobiliary ABCC transporters could provide important insights into the pathogenesis of diseases and disposition of xenobiotics. In this review, we describe the regulation of hepatic ABCC transporters in humans and rodents by a variety of xenobiotics, under disease states and in genetically modified animal models deficient in transcription factors, transporters, and cell-signaling molecules.
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Affiliation(s)
- Xinsheng Gu
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, 06269, USA
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MARTINEZ M, MODRIC S. Patient variation in veterinary medicine: part I. Influence of altered physiological states. J Vet Pharmacol Ther 2010; 33:213-26. [DOI: 10.1111/j.1365-2885.2009.01139.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Ikemura K, Iwamoto T, Okuda M. Altered functions and expressions of drug transporters in liver, kidney and intestine in disorders of local and remote organs: possible role of oxidative stress in the pathogenesis. Expert Opin Drug Metab Toxicol 2009; 5:907-20. [DOI: 10.1517/17425250903008525] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Inhibition of mitochondrial respiratory chain in the brain of rats after hepatic failure induced by carbon tetrachloride is reversed by antioxidants. Brain Res Bull 2009; 80:75-8. [PMID: 19406217 DOI: 10.1016/j.brainresbull.2009.04.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 04/21/2009] [Accepted: 04/22/2009] [Indexed: 11/23/2022]
Abstract
Hepatic encephalopathy is an important cause of morbidity and mortality in patients with severe hepatic failure. This disease is clinically characterized by a large variety of symptoms including motor symptoms, cognitive deficits, as well as changes in the level of alertness up to hepatic coma. Carbon tetrachloride is frequently used in animals to produce an experimental model to study the mechanisms involved in the progression of hepatic disease and the impact of various drugs on this progression. The brain is highly dependent on ATP and most cell energy is obtained through oxidative phosphorylation, a process requiring the action of various respiratory enzyme complexes located in a special structure of the inner mitochondrial membrane. In this context, we evaluated the activities of mitochondrial respiratory chain complexes in the brain of rats submitted to acute administration of carbon tetrachloride and treated with NAC and DFX alone or in combination. Our results showed that complexes I, II and IV were inhibited after carbon tetrachloride administration and that NAC and DFX alone or in combination were able to prevent the inhibition of these enzymes. On the other hand, complex III was not affected. The participation of oxidative stress has been postulated in the hepatic encephalopathy and it is well known that the electron transport chain itself is vulnerable to damage by this species. Based on our findings, we suggest that oxidative stress may be involved in the inhibition of complexes from mitochondrial respiratory chain.
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