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Reis-Mendes A, Vitorino-Oliveira C, Ferreira M, Carvalho F, Remião F, Sousa E, de Lourdes Bastos M, Costa VM. Comparative In Vitro Study of the Cytotoxic Effects of Doxorubicin's Main Metabolites on Cardiac AC16 Cells Versus the Parent Drug. Cardiovasc Toxicol 2024; 24:266-279. [PMID: 38347287 PMCID: PMC10937802 DOI: 10.1007/s12012-024-09829-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 01/10/2024] [Indexed: 03/14/2024]
Abstract
Doxorubicin (DOX; also known as adriamycin) serves as a crucial antineoplastic agent in cancer treatment; however, its clinical utility is hampered by its' intrinsic cardiotoxicity. Although most DOX biotransformation occurs in the liver, a comprehensive understanding of the impact of DOX biotransformation and its' metabolites on its induced cardiotoxicity remains to be fully elucidated. This study aimed to explore the role of biotransformation and DOX's main metabolites in its induced cardiotoxicity in human differentiated cardiac AC16 cells. A key discovery from our study is that modulating metabolism had minimal effects on DOX-induced cytotoxicity: even so, metyrapone (a non-specific inhibitor of cytochrome P450) increased DOX-induced cytotoxicity at 2 µM, while diallyl sulphide (a CYP2E1 inhibitor) decreased the 1 µM DOX-triggered cytotoxicity. Then, the toxicity of the main DOX metabolites, doxorubicinol [(DOXol, 0.5 to 10 µM), doxorubicinone (DOXone, 1 to 10 µM), and 7-deoxydoxorubicinone (7-DeoxyDOX, 1 to 10 µM)] was compared to DOX (0.5 to 10 µM) following a 48-h exposure. All metabolites evaluated, DOXol, DOXone, and 7-DeoxyDOX caused mitochondrial dysfunction in differentiated AC16 cells, but only at 2 µM. In contrast, DOX elicited comparable cytotoxicity, but at half the concentration. Similarly, all metabolites, except 7-DeoxyDOX impacted on lysosomal ability to uptake neutral red. Therefore, the present study showed that the modulation of DOX metabolism demonstrated minimal impact on its cytotoxicity, with the main metabolites exhibiting lower toxicity to AC16 cardiac cells compared to DOX. In conclusion, our findings suggest that metabolism may not be a pivotal factor in mediating DOX's cardiotoxic effects.
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Affiliation(s)
- Ana Reis-Mendes
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Cláudia Vitorino-Oliveira
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Mariana Ferreira
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Félix Carvalho
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Fernando Remião
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Emília Sousa
- Laboratory of Organic and Pharmaceutical Chemistry, Chemistry Department, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, 4450-208, Porto, Portugal
| | - Maria de Lourdes Bastos
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal
| | - Vera Marisa Costa
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal.
- Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, UCIBIO - Applied Molecular Biosciences Unit, University of Porto, 4050-313, Porto, Portugal.
- Toxicology Laboratory, Faculty of Pharmacy, UCIBIO, University Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal.
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Mu QG, Lin G, Jeon M, Wang H, Chang FC, Revia RA, Yu J, Zhang M. Iron oxide nanoparticle targeted chemo-immunotherapy for triple negative breast cancer. MATERIALS TODAY (KIDLINGTON, ENGLAND) 2021; 50:149-169. [PMID: 34987308 PMCID: PMC8722574 DOI: 10.1016/j.mattod.2021.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Triple negative breast cancer is difficult to treat effectively, due to its aggressiveness, drug resistance, and lack of the receptors required for hormonal therapy, particularly at the metastatic stage. Here, we report the development and evaluation of a multifunctional nanoparticle formulation containing an iron oxide core that can deliver doxorubicin, a cytotoxic agent, and polyinosinic:polycytidylic acid (Poly IC), a TLR3 agonist, in a targeted and simultaneous fashion to both breast cancer and dendritic cells. Endoglin-binding peptide (EBP) is used to target both TNBC cells and vasculature epithelia. The nanoparticle demonstrates favorable physicochemical properties and a tumor-specific targeting profile. The nanoparticle induces tumor apoptosis through multiple mechanisms including direct tumor cell killing, dendritic cell-initiated innate and T cell-mediated adaptive immune responses. The nanoparticle markedly inhibits tumor growth and metastasis and substantially extends survival in an aggressive and drug-resistant metastatic mouse model of triple negative breast cancer (TNBC). This study points to a promising platform that may substantially improve the therapeutic efficacy for treating metastatic TNBC.
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Affiliation(s)
- Qin gxin Mu
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Guanyou Lin
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Mike Jeon
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Hui Wang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Fei-Chien Chang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Richard A Revia
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - John Yu
- Department of Neurosurgery, Maxine-Dunitz Neurosurgical Institute, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Miqin Zhang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
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Genetic Polymorphisms Affecting Cardiac Biomarker Concentrations in Children with Cancer: an Analysis from the "European Paediatric Oncology Off-patents Medicines Consortium" (EPOC) Trial. Eur J Drug Metab Pharmacokinet 2021; 45:413-422. [PMID: 31981210 DOI: 10.1007/s13318-019-00592-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND OBJECTIVES Doxorubicin plays an essential role in the treatment of paediatric cancers. Defining genotypes with a higher risk for developing anthracycline-induced cardiotoxicity could help to reduce cardiotoxicity. METHODS Data originated from a phase II study assessing the pharmacokinetics of doxorubicin in 100 children. Studied patients (0-17 years) were treated for solid tumours or leukaemia. Two cycles of doxorubicin were studied. Concentrations of natriuretic peptides proANP, BNP and NT-proBNP and cardiac troponins T and I were measured at five time points before, during and after two cycles of doxorubicin treatment. Genotypes of 17 genetic polymorphisms in genes encoding for anthracycline metabolizing enzymes and drug transporters were determined for each patient. We analysed the influence of genotypes on cardiac biomarker concentrations at different time points by a Kruskal-Wallis test. To perform a pairwise comparison significant genetic polymorphisms with more than two genotypes were analysed by a post hoc test. RESULTS The Kruskal-Wallis tests and the post hoc-tests showed a significant association for seven genetic polymorphisms (ABCB1-rs1128503, ABCB1-rs1045642, ABCC1-rs4148350, CBR3-rs8133052, NQO2-in/del, SLC22A16-rs714368 and SLC22A16-rs6907567) with the concentration of at least one biomarker at one or more time points. We could not identify any polymorphism with a consistent effect on any biomarker over the whole treatment period. CONCLUSIONS In this study of patients treated with doxorubicin for different tumour entities, seven genetic polymorphisms possibly influencing the pharmacokinetics and pharmacodynamics of doxorubicin could lead occasionally to differences in the concentration of cardiac biomarkers. Since, the role of cardiac biomarkers for monitoring anthracycline-induced cardiotoxicity has not yet been clarified, further trials with a long follow-up time are required to assess the impact of these genetic polymorphisms on chemotherapy-related cardiotoxicity. TRIAL REGISTRATION EudraCT number: 2009-011454-17.
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Patel R, Barker J, ElShaer A. Pharmaceutical Excipients and Drug Metabolism: A Mini-Review. Int J Mol Sci 2020; 21:E8224. [PMID: 33153099 PMCID: PMC7662502 DOI: 10.3390/ijms21218224] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022] Open
Abstract
Conclusions from previously reported articles have revealed that many commonly used pharmaceutical excipients, known to be pharmacologically inert, show effects on drug transporters and/or metabolic enzymes. Thus, the pharmacokinetics (absorption, distribution, metabolism and elimination) of active pharmaceutical ingredients are possibly altered because of their transport and metabolism modulation from the incorporated excipients. The aim of this review is to present studies on the interaction of various commonly-used excipients on pre-systemic metabolism by CYP450 enzymes. Excipients such as surfactants, polymers, fatty acids and solvents are discussed. Based on all the reported outcomes, the most potent inhibitors were found to be surfactants and the least effective were organic solvents. However, there are many factors that can influence the inhibition of CYP450, for instance type of excipient, concentration of excipient, type of CYP450 isoenzyme, incubation condition, etc. Such evidence will be very useful in dosage form design, so that the right formulation can be designed to maximize drug bioavailability, especially for poorly bioavailable drugs.
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Affiliation(s)
| | | | - Amr ElShaer
- Drug Discovery, Delivery and Patient Care (DDDPC), School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey KT1 2EE, UK; (R.P.); (J.B.)
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Wang Y, Liu M, Zhang J, Liu Y, Kopp M, Zheng W, Xiao S. Multidrug Resistance Protein 1 Deficiency Promotes Doxorubicin-Induced Ovarian Toxicity in Female Mice. Toxicol Sci 2019; 163:279-292. [PMID: 29462422 DOI: 10.1093/toxsci/kfy038] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Multidrug resistance protein 1 (MDR1), a phase III drug transporter that exports substrates out of cells, has been discovered in both cancerous and normal tissues. The over expression of MDR1 in cancer cells contributes to multiple drug resistance, whereas the MDR1 in normal tissues protects them from chemical-induced toxicity. Currently, the role of MDR1 in the ovary has not been entirely understood. Our objective is to determine the function of MDR1 in protecting against chemotherapy-induced ovarian toxicity. Using both the in vivo transgenic mouse model and in vitro follicle culture model, we investigated the expression of MDR1 in the ovary, the effect of MDR1 deficiency on doxorubicin (DOX)-induced ovarian toxicity, and the ovarian steroid hormonal regulation of MDR1. Results showed that the MDR1 was expressed in the ovarian epithelial cells, stroma cells, theca cell layers, endothelial cells, and luteal cells. The lack of MDR1 did not affect female ovarian function and fertility; however, its deficiency significantly exacerbated the DOX-induced ovarian toxicity in both in vivo and in vitro models. The MDR1 showed significantly higher expression levels in the ovaries at estrus and metestrus stages than those at proestrus and diestrus stages. However, this dynamic expression pattern was not regulated by the ovarian steroid hormones of estrogen (E2) and progesterone (P4) but correlated to the number and status of corpus luteum. In conclusion, our study demonstrates that the lack of MDR1 promotes DOX-induced ovarian toxicity, suggesting the critical role of MDR1 in protecting female ovarian functions during chemotherapy.
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Affiliation(s)
- Yingzheng Wang
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina 29208
| | - Mingjun Liu
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina 29208
| | - Jiyang Zhang
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Yuwen Liu
- Department of Human Genetics, The University of Chicago, Chicago, Illinois 60637
| | - Megan Kopp
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina 29208
| | - Weiwei Zheng
- Key Laboratory of Public Health Safety, Ministry of Education, Department of Environmental Health, School of Public Health, Institution for Water Pollution and Health Research, Fudan University, Shanghai 20032, China
| | - Shuo Xiao
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina 29208
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Xiao S, Zhang J, Liu M, Iwahata H, Rogers HB, Woodruff TK. Doxorubicin Has Dose-Dependent Toxicity on Mouse Ovarian Follicle Development, Hormone Secretion, and Oocyte Maturation. Toxicol Sci 2018; 157:320-329. [PMID: 28329872 DOI: 10.1093/toxsci/kfx047] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Doxorubicin (DOX), one of the most commonly used anticancer medications, has been reported to affect fertility by damaging ovarian follicles; however, the dose-dependent toxicity of DOX on the dynamic follicle development and oocyte maturation has not been well-defined. Our objective is to determine the effects of human-relevant exposure levels of DOX on follicular functions across developmental time. In vitro cultured multilayered secondary mouse follicles were treated with DOX at 0, 2, 20, 100, and 200 nM for 24 h, and follicle development, hormone secretion, and oocyte maturation were analyzed. DOX caused dose-dependent toxicity on follicle growth, survival, and secretion of 17β-estradiol (E2). At 200 nM, DOX induced DNA damage and apoptosis in follicle somatic cells first and then in oocytes, which was correlated with the uptake of DOX first to the somatic cells followed by germ cells. Follicles treated with DOX at 0, 2, and 20 nM showed similar oocyte metaphase II (MII) percentages after in vitro oocyte maturation; however, 20 nM DOX significantly increased the number of MII oocytes with abnormal spindle morphology and chromosome misalignment. In an effort to harmonize the in vitro study to in vivo treatment, dose-dependent toxicity on oocyte meiotic maturation was found in 16-day-old CD-1 mice treated with DOX at 0, 0.4, 2, and 10 mg/kg, consistent with the in vitro oocyte maturation outcomes. Our study demonstrates that DOX has dose-dependent toxicity on ovarian follicle development, hormone secretion, and oocyte maturation, which are three key factors to support the female reproductive and endocrine functions.
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Affiliation(s)
- Shuo Xiao
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Center for Reproductive Science, Northwestern University, Chicago, Illinois, USA
| | - Jiyang Zhang
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Master of Biotechnology Program, Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois, USA
| | - Mingjun Liu
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Master of Biotechnology Program, Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois, USA
| | - Hideyuki Iwahata
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Center for Reproductive Science, Northwestern University, Chicago, Illinois, USA
| | - Hunter B Rogers
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Center for Reproductive Science, Northwestern University, Chicago, Illinois, USA
| | - Teresa K Woodruff
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Center for Reproductive Science, Northwestern University, Chicago, Illinois, USA
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Hu H, Li Y, Zhou Q, Ao Y, Yu C, Wan Y, Xu H, Li Z, Yang X. Redox-Sensitive Hydroxyethyl Starch-Doxorubicin Conjugate for Tumor Targeted Drug Delivery. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30833-30844. [PMID: 27791359 DOI: 10.1021/acsami.6b11932] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Doxorubicin (DOX) is one of the most potent anticancer agents in cancer chemotherapy, but the clinical use of DOX is restricted by its severe side effects caused by nonspecific delivery. To alleviate the side effects and improve the antitumor efficacy of DOX, a novel redox-sensitive hydroxyethyl starch-doxorubicin conjugate, HES-SS-DOX, with diameter of 19.9 ± 0.4 nm was successfully prepared for tumor targeted drug delivery and GSH-mediated intracellular drug release. HES-SS-DOX was relatively stable under extracellular GSH level (∼2 μM) but released DOX quickly under intracellular GSH level (2-10 mM). In vitro cell study confirmed the GSH-mediated cytotoxicity of HES-SS-DOX. HES-SS-DOX exhibited prolonged plasma half-life time and enhanced tumor accumulation in comparison to free DOX. As a consequence, HES-SS-DOX exhibited better antitumor efficacy and reduced toxicity as compared to free DOX in the in vivo antitumor activity study. The redox-sensitive HES-SS-DOX was proved to be a promising prodrug of DOX, with clinical potentials, to achieve tumor targeted drug delivery and timely intracellular drug release for effective and safe cancer chemotherapy.
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Affiliation(s)
- Hang Hu
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Yihui Li
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Qing Zhou
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Yanxiao Ao
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Chan Yu
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Ying Wan
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Huibi Xu
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
| | - Zifu Li
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
- Wuhan Institute of Biotechnology , High Tech Road 666, East Lake High Tech Zone, Wuhan 430040, People's Republic of China
| | - Xiangliang Yang
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
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Shahzadi A, Yazici Z. Effect of Ciprofloxacin on the Plasma Concentration of Doxorubicin, Following Acute and Chronic Dose Protocol in Sprague Dawley Rats. INT J PHARMACOL 2013. [DOI: 10.3923/ijp.2014.69.77] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Li G, Yang F, He L, Ding H, Sun N, Liu Y, Liu Y, Shan Q, Li Y, Zeng Z. Pharmacokinetics of mequindox and its metabolites in rats after intravenous and oral administration. Res Vet Sci 2012; 93:1380-6. [PMID: 22459092 DOI: 10.1016/j.rvsc.2012.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 01/10/2012] [Accepted: 02/26/2012] [Indexed: 12/28/2022]
Abstract
Pharmacokinetics of mequindox (MEQ) and its metabolites were determined in rats after intravenous (i.v.) and oral (p.o.) administration of MEQ at a single dose of 10 mg kg(-1) bodyweight. After both administrations, MEQ and five of its metabolites were quantified, except M4, whereas M1 and M2 were the predominant ones. The areas under the concentration-time curves (h ng mL(-1)) of MEQ, M1, M2, M3, M5 and M10 after i.v. administration were 7559±495, 6354±2761, 5586±2337, 1034±160, 2370±791 and 1813±622, respectively, whereas after p.o. administration, remained as 2809±40, 4361±3544, 4351±1046, 1444±814, 3864±305 and 1213±569, respectively. The elimination half-lives (h) of these compounds after i.v. administration were 3.48±0.80, 4.20±0.76, 6.25±2.41, 4.77±1.54, 4.69±1.62 and 16.89±5.15, respectively, and were 3.21±0.40, 3.66±1.06, 4.20±1.03, 8.91±5.99, 4.20±2.02 and 20.84±10.85 after p.o. administration, respectively. After p.o. administration, the bioavailability of MEQ was 37.16%. The results showed that MEQ was extensively metabolized in rats and rapidly absorbed after p.o. administration.
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Affiliation(s)
- Guanghui Li
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China
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Wang Y, Katzenmeyer JB, Arriaga EA. Combination of micellar electrokinetic and high-performance liquid chromatographies to assess age-related changes in the in vitro metabolism of Fischer 344 rat liver. J Gerontol A Biol Sci Med Sci 2011; 66:935-43. [PMID: 21746738 DOI: 10.1093/gerona/glr074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The metabolism of doxorubicin, a widely used anticancer drug, is different in young adult and old cancer patients. In this study, we demonstrate that micellar electrokinetic chromatography with laser-induced fluorescence detection is highly suited to monitor the metabolism of doxorubicin in subcellular fractions isolated from young adult (11 months, 100% survival rate) and old (26 months, ~25% survival rate) Fischer 344 rat livers. The relative amounts of doxorubicin metabolized in both mitochondria-enriched and postmitochondria fractions of young adult were larger than the respective fractions of old rat liver. 7-Deoxydoxorubicinolone and 7-deoxydoxorubicinone were identified using internal standard addition and structural elucidation by high-performance liquid chromatography with combined laser-induced fluorescence and mass spectrometry detection. Although high-performance liquid chromatography with combined laser-induced fluorescence and mass spectrometry detection is more useful in the identification of compounds, micellar electrokinetic chromatography with laser-induced fluorescence detection has low-sample requirements, simplified sample processing procedures, short analysis times and low limit of detection. Therefore, the combination of these two techniques provides a powerful approach to investigate metabolism of fluorescent drugs in aging studies.
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Affiliation(s)
- Yaohua Wang
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
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Fasinu P, Pillay V, Ndesendo VMK, du Toit LC, Choonara YE. Diverse approaches for the enhancement of oral drug bioavailability. Biopharm Drug Dispos 2011; 32:185-209. [PMID: 21480294 DOI: 10.1002/bdd.750] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 11/23/2010] [Accepted: 01/28/2011] [Indexed: 12/31/2022]
Abstract
In conscious and co-operating patients, oral drug delivery remains the preferable route of drug administration. However, not all drugs possess the desirable physicochemical and pharmacokinetic properties which favor oral administration mainly due to poor bioavailability. This has in some cases led to the choice of other routes of administration, which may compromise the convenience and increase the risk of non-compliance. Poor bioavailability has necessitated the administration of higher than normally required oral doses which often leads to economic wastages, risk of toxicity, erratic and unpredictable responses. The challenge over the years has been to design techniques that will allow oral administration of most drugs, irrespective of their properties, to achieve a therapeutic systemic availability. This will be a worthy achievement since over 90% of therapeutic compounds are known to possess oral bioavailability limitations. In this review, an attempt has been made to explore various approaches that have been used in recent years to improve oral drug bioavailability, including physical and chemical means. This review strives to provide a comprehensive overview of advances made over the past 10 years (2000-2010) in the improvement of the oral bioavailability of drugs. Briefly, the design of prodrugs to bypass metabolism or to enhance solubility as well as modification of formulation techniques such as the use of additives, permeation enhancers, solubilizers, emulsifiers and non-aqueous vehicles have been discussed. Arising approaches, such as formulation modification techniques; novel drug delivery systems, which exploit the gastrointestinal regionality of drugs, and include the pharmaceutical application of nanotechnology as an emerging area in drug delivery; inhibition of efflux pumps; and inhibition of presystemic metabolism have been more extensively addressed. This critical review sought to assess each method aimed at enhancing the oral bioavailability of drugs in terms of the purpose, scientific basis, limitations, commercial application, as well as the areas in which current research efforts are being focused and should be focused in the future.
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Affiliation(s)
- Pius Fasinu
- Department of Pharmacy and Pharmacology, University of the Witwatersrand, 7 York Road, Parktown 2193, Johannesburg, South Africa
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Selting KA, Ogilvie GK, Gustafson DL, Long ME, Lana SE, Walton JA, Hansen RA, Turner AS, Laible I, Fettman MJ. Evaluation of the effects of dietary n-3 fatty acid supplementation on the pharmacokinetics of doxorubicin in dogs with lymphoma. Am J Vet Res 2006; 67:145-51. [PMID: 16426224 DOI: 10.2460/ajvr.67.1.145] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the effect of dietary n-3 fatty acids on the pharmacokinetics of doxorubicin in dogs with lymphoma. ANIMALS 23 dogs with lymphoma in stages IIIa, IVa, and Va. PROCEDURE Dogs receiving doxorubicin chemotherapy were randomly allocated to receive food with a high (test group) or low (control group) content of n-3 fatty acids. Serum doxorubicin and doxorubicinol concentrations were measured via high-performance liquid chromatography before and 6 to 9 weeks after initiation of the diets. Lymph node concentrations of doxorubicin were assessed 6 hours after the initial treatment. Dogs' body composition was assessed by means of dual-energy x-ray absorptiometry scans. RESULTS No significant differences in doxorubicin pharmacokinetics were detected between treatment groups. Significant differences existed between the first and second sampling times among all dogs for area under the curve, maximum serum concentration, and clearance. Differences in body composition did not affect measured pharmacokinetic variables. The terminal elimination half-life was longer in dogs in which a long-term remission was achieved than in dogs that did not have remission. CONCLUSIONS AND CLINICAL RELEVANCE Dietary supplementation of n-3 fatty acids is common in veterinary patients with neoplasia, but supplementation did not affect doxorubicin pharmacokinetics in this population of dogs. Explanations for the beneficial effects of n-3 fatty acids other than alterations in the pharmacokinetics of chemotherapy drugs should be investigated. Dogs may metabolize drugs differently prior to remission of lymphoma than when in remission. The pharmacokinetics of doxorubicin at the time of the first administration may predict response to treatment.
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Affiliation(s)
- Kim A Selting
- Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
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Tortolani PJ, Park AE, Louis-Ugbo J, Attallah-Wasef ES, Kraiwattanapong C, Heller JG, Boden SD, Yoon ST. The effects of doxorubicin (adriamycin) on spinal fusion: an experimental model of posterolateral lumbar spinal arthrodesis. Spine J 2004; 4:669-74. [PMID: 15541701 DOI: 10.1016/j.spinee.2004.05.254] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2003] [Accepted: 05/24/2004] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Malignant spinal lesions may require surgical excision and segmental stabilization. The decision to perform a concomitant fusion procedure is influenced in part by the need for adjunctive chemotherapy as well as the patient's anticipated survival. Although some evidence exists that suggests that chemotherapy may inhibit bony healing, no information exists regarding the effect of chemotherapy on spinal fusion healing. PURPOSE To determine the effect of a frequently used chemotherapeutic agent, doxorubicin, on posterolateral spinal fusion rates. STUDY DESIGN/SETTING Prospective animal model of posterolateral lumbar fusion. OUTCOME MEASURES Determination of spinal fusion by manual palpation of excised spines. Plain radiographic evaluation of denuded spines to evaluate intertransverse bone formation. METHODS Thirty-two New Zealand White rabbits underwent posterior intertransverse process fusion at L5-L6 with the use of iliac autograft bone. Rabbits randomly received either intravenous doxorubicin (2.5 mg/kg) by means of the central vein of the ear at the time of surgery (16 animals) or no treatment (16 animals; the control group). The animals were euthanized at 5 weeks, and the lumbar spines were excised. Spine fusion was assessed by manually palpating (by observers blinded to the treatment group) at the level of arthrodesis, and at the adjacent levels proximal and distal. This provided similar information to surgical fusion assessment by palpation in humans. Fusion was defined as the absence of palpable motion. Posteroanterior radiographs of the excised spines were graded in a blinded fashion using a five-point scoring system (0 to 4) devised to describe the amount of bone observed between the L5-L6 transverse processes. Power analysis conducted before initiation of the study indicated that an allocation of 16 animals to each group would permit detection of at least a 20% difference in fusion rates with statistical significance at p=.05. RESULTS Eleven of the 16 spines (69%) in the control group and 6 of the 16 spines (38%) in the doxorubicin group fused. This difference was statistically significant (=.038). There was no significant correlation (p>.05) between the radiographic grade of bone formation (0 to 4) and fusion as determined by palpation. There were four wound infections in the control group and four in the doxorubicin group. However, solid fusions were palpated in three of these four spines in both the control and treatment groups. CONCLUSIONS No significant differences in wound complications were noted with doxorubicin administration. A single dose of doxorubicin administered intravenously at the time of surgery appears to play a significant inhibitory role in the process of spinal fusion. If similar effects occur in humans, these data suggest that doxorubicin may be harmful to bone healing in a spine fusion if given during the perioperative period. Further investigation will be necessary to determine the effect of time to aid at determining whether doxorubicin administered several weeks pre- or postoperatively results in improved fusion rate, and whether bone morphogenetic proteins can overcome these inhibitory effects.
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Affiliation(s)
- P Justin Tortolani
- Scoliosis and Spine Center of Maryland St. Joseph Medical Center, O'Dea Medical Arts Bldg, 7505 Osler Drive, Suite 104, Towson, MD 21204-7737, USA
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Abstract
Cancer and epilepsy commonly co-occur, and concomitant administration of antiepileptic (AEDS) and chemotherapeutic drugs (CTDs) is necessary in many cases. Many drugs are metabolised by the hepatic cytochrome P450 (CYP) isoenzyme system, and coadministration of AEDs and CTDs can lead to clinically relevant interactions by induction or inhibition of enzymes in shared metabolic pathways. These interactions can cause insufficient tumour and seizure control or lead to unforeseen toxicity. Enzyme-inducing AEDs reduce the effects of taxanes, vinca alkaloids, methotrexate, teniposide, and camptothecin analogues. Inhibition of the metabolism of nitrosoureas or etoposide by valproic acid can lead to CTD toxicity. Poor seizure control may result from the combinations of phenytoin with cisplatin or corticosteroids, and valproic acid with methotrexate. Increased toxicity of AEDs can occur when phenytoin is combined with 5-fluorouracil. Use of enzyme-inducing AEDs should be avoided in patients with cancer, particularly in association with chemotherapy. Generally, valproic acid-although not free from interactions-would be the agent of first choice. Some of the newer AEDs not metabolised by the P450 system may prove to be good alternatives.
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Kimura Y, Sawai N, Okuda H. Antitumour activity and adverse reactions of combined treatment with chitosan and doxorubicin in tumour-bearing mice. J Pharm Pharmacol 2001; 53:1373-8. [PMID: 11697545 DOI: 10.1211/0022357011777873] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
We examined the antitumour activity and adverse reactions, such as myelotoxicity, gastrointestinal toxicity and body-weight loss,of the cancer chemotherapy drug doxorubicin when given with chitosan in sarcoma 180-bearing mice. Intraperitoneally administered doxorubicin (5 mg kg(-1)) given on days 1 and 8 with or without orally administered chitosan (200, 400 and 800 mg kg(-1) twice daily) inhibited tumour growth. The orally administered chitosan (400 and 800 mg kg(-1) twice daily) prevented doxorubicin-induced body-weight loss and small-intestinal mucosal injury. Similarly, the reduction of leucocyte number induced by the intraperitoneally administered doxorubicin was restored to normal by the oral administration of chitosan (400 and 800 mg kg(-1) twice daily). It seems likely that the mechanisms by which the orally administered chitosan protects against doxorubicin-induced gastrointestinal toxicity may be due to the formation of doxorubicin-chitosan complex in the small-intestinal mucosa through the diffusion of chitosan into the small-intestinal villi. In conclusion, our data suggest that the oral administration of chitosan prevents the gastrointestinal mucositis associated with doxorubicin therapy.
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Affiliation(s)
- Y Kimura
- Second Department of Medical Biochemistry, School of Medicine, Ehime University, Onsen-gun, Japan.
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