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El-Beshbishy HA, Waggas DS, Ali RA. Rats' testicular toxicity induced by bisphenol A is lessened by crocin via an antiapoptotic mechanism and bumped P-glycoprotein expression. Toxicon 2024; 241:107674. [PMID: 38458495 DOI: 10.1016/j.toxicon.2024.107674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/09/2024] [Accepted: 02/29/2024] [Indexed: 03/10/2024]
Abstract
Bisphenol A (BPA) engenders testicular toxicity via hydroxyl free radical genesis in rat striatum and depletion of the endogenous antioxidants in the epididymal sperms. The multi-drug resistance efflux carrier; P-glycoprotein (P-gp) expel the BPA from the testis and is responsible for the testicular protection through the deactivation of numerous xenobiotics. In our study, we investigated whether the BPA-induced testicular toxicity could be circumvented through administration of an antioxidant; crocin (Cr). Implication of P-gp expression was also investigated. Rats administered BPA (10 mg/kg b.w. orally for 14 days), dropped the body weight, testes/body weight ratio, total protein content, testosterone, follicle stimulating hormone, luteinizing hormone, and sperm motility & count, total antioxidant status, glutathione content and antioxidant enzymes (superoxide dismutase and catalase), concomitant with the elevation of the percentage abnormal sperm morphology, as well as testicular lipid peroxides and nitrite/nitrate levels. Histopathological examination showed spermatogenesis disorders after the BPA rats exposure. The immunohistochemical study showed up-regulation of the P-gp as evident by increasing immunoreactivity in interstitial cells, with positive localization in some spermatogonia cells. The BPA-treated rats showed positive immunoreactivity against caspase-3. The co-intake of Cr (200 mg/kg b.w./day, i.p. 14 days) along with the BPA, significantly ameliorated all the mentioned parameters, boosted histopathological image, fell the caspase-3 up-regulation, and perched the P-gp expression. We showed that, Cr promotes P-gp as an approach to nurture the testicles against the BPA toxicity. In conclusion; Cr lessens the oxidative stress conditions to safeguard rats from the BPA-induced testicular toxicity and sex hormones abnormalities, reducing apoptosis and up-regulating P-gp.
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Affiliation(s)
- Hesham A El-Beshbishy
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, 11231, Egypt; Medical Laboratory Sciences Department, Fakeeh College for Medical Sciences, Jeddah, 21461, Saudi Arabia.
| | - Dania S Waggas
- Pathological Sciences Department, Fakeeh College for Medical Sciences, Jeddah, 21461, Saudi Arabia
| | - Rabab A Ali
- Genetics Unit, Children Hospital, Mansoura University, Mansoura, 35516, Egypt; Medical Laboratory Technology Dept., College of Applied Medical Sciences, Taibah University, Yanbu, Saudi Arabia
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2
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Ijima H, Kuroda S, Ono T, Kawakami K. Digoxin Transport by Renal Proximal Tubule Cells is Enhanced by Adhesive Synthetic RGD Peptide. Int J Artif Organs 2018; 30:25-33. [PMID: 17295190 DOI: 10.1177/039139880703000105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Introduction The dialyzer apparatus has been widely used as an artificial kidney in medical treatment. However, side effects such as amyloidosis have occurred during long-term treatment. Therefore, we focused on developing a hybrid artificial kidney with a filtration and reabsorption apparatus, but it was found that cells spread extensively and it is difficult to maintain a uniform monolayer with a regular cell shape on a collagen-coated substrate. The purpose of this study was to improve cell adhesion, uniform stable monolayer formation and active transport function by immobilization of arginine-glycine-aspartic acid (RGD) on the culture substratum. Materials and Methods Polycarbonate semipermeable membranes were coated with collagen, fibronectin, laminin and synthetic polypeptide, including RGD (Pronectin F). Cell adhesion and digoxin transport were estimated using a renal proximal tubule cell line that overexpressed the P-glycoprotein gene. Results and Discussion Under initial and confluent conditions, immobilized cell density in Pronectin F-coated wells was higher than that under other conditions. Transepithelial electrical resistance and digoxin transport activity on Pronectin F-coated membranes were the highest of all conditions. This might have been caused by uniform cell morphology and high cell density.
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Affiliation(s)
- H Ijima
- Department of Chemical Engineering, Faculty of Engineering, Graduate School, Kyushu University, Nishi-ku, Fukuoka, Japan.
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3
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Takahashi M, Sakurai M, Enosawa S, Omasa T, Tsuruoka S, Matsumura T. Double-Compartment Cell Culture Apparatus: Construction and Biochemical Evaluation for Bioartificial Liver Support. Cell Transplant 2017; 15:945-52. [PMID: 17300000 DOI: 10.3727/000000006783981341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Functional demands on a bioartificial liver support (BAL) device are not limited to biosynthetic activities, but must also encompass metabolic removal of potentially toxic substances. For most BALs, however, the concept and design are exclusively directed to biosynthetic support. To add the ability to metabolize and remove toxic substances, we designed a double-compartment cell culture apparatus (DCCA). Two compartments are separated from each other by a compact epithelial cell sheet spread over a synthetic microporous membrane. When a renal proximal convoluted tubular cell line that had been transduced with the human multidrug-resistant (MDR) gene, PCTL-MDR, was introduced into one of the compartments (hereafter referred to as the “inner” compartment) of the DCCA, a compact cellular monolayer was formed on the membrane. Ammonium ions passed across the membrane, but glucose and its metabolite lactate could not, indicating that the DCCA allowed selective transportation of cellular metabolites. In addition to PCTL-MDR, HepG2, a cell line of hepatic-origin, transduced with CYP3A4 (designated GS-3A4-HepG2), was seeded on the opposite side of the membrane, and the metabolism and transportation of lidocaine were studied. The lidocaine metabolite, monoethylglycinexylidide, was detected in the inner compartment across the PCTL-MDR cell layered membrane, indicating that metabolism and the selective transportation of metabolites between the two compartments occurred by cooperation of renal and hepatic cells. These results suggest that this type of DCCA represents a novel BAL that possesses biotransporting activities, as well as biosynthetic and metabolic activities.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Calcium/metabolism
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Culture Techniques/instrumentation
- Cell Culture Techniques/methods
- Cell Line, Tumor
- Chromatography, High Pressure Liquid
- Glucose/metabolism
- Humans
- Lactic Acid/metabolism
- Liver, Artificial
- Membranes, Artificial
- Models, Theoretical
- Quaternary Ammonium Compounds/metabolism
- Transfection
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Affiliation(s)
- Masahiro Takahashi
- Cell Technology Center, Roman Industries Co. Ltd., Yokohama 236-0004, Japan
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4
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Abstract
The kidney plays a vital role in the elimination of xenobiotics including drugs, toxins, and endogenous metabolites. Renal drug elimination involves 3 major processes: glomerular filtration, tubular secretion, and tubular reabsorption. Although glomerular filtration is a simple unidirectional diffusion process, renal tubular secretion and/or reabsorption can involve saturable processes mediated by multiple highly specialized membrane transport systems. Current research has identified that these transport proteins play a significant role in the efficient removal and/or reabsorption of pharmacological agents. Since the majority of membrane transporters have broad substrate specificity, there is a significant risk for drug-drug interactions through competition for similar transport pathways. This article will focus on the cellular expression, localization, and transport properties of various renal drug transport systems (ie, organic anion, organic cation, nucleoside, and adenosine triphosphate [ATP]-dependent efflux transporters). Specific examples of drugs that are transported by each of these mechanisms will be provided. Clinically relevant drug-drug interactions involving renal drug transporters will be discussed to guide the clinician in understanding and preventing these interactions.
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Affiliation(s)
- Patrick T. Ronaldson
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto
| | - Reina Bendayan
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto,
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5
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El-Sheikh AAK, Morsy MA, Mahmoud MM, Rifaai RA. Protective mechanisms of coenzyme-Q10 may involve up-regulation of testicular P-glycoprotein in doxorubicin-induced toxicity. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:772-781. [PMID: 24632013 DOI: 10.1016/j.etap.2014.02.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 01/28/2014] [Accepted: 02/10/2014] [Indexed: 06/03/2023]
Abstract
The anticancer drug; doxorubicin (DOX), causes testicular toxicity as an adverse effect. P-glycoprotein (P-gp) is a multidrug resistance efflux transporter expressed in blood-testis barrier, which extrudes DOX from the testis. We investigated whether DOX-induced gonadal injury could be prevented by the use of antioxidant; coenzyme-Q10 (CoQ10). The involvement of P-gp expression, as a possible protective mechanism, was also investigated. CoQ10 was administered orally for 8 days, and DOX toxicity was induced via a single i.p. dose of 15 mg/kg at day 4. Concomitant administration of CoQ10 with DOX significantly restored testicular oxidative stress parameters and the distorted histopathological picture, reduced the up-regulation of caspase 3 caused by DOX, and increased P-gp expression. We show for the first time that CoQ10 up-regulates P-gp as a novel mechanism for gonadal protection. In conclusion, CoQ10 protects against DOX-induced testicular toxicity in rats via ameliorating oxidative stress, reducing apoptosis and up-regulating testicular P-gp.
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Affiliation(s)
- Azza A K El-Sheikh
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia, Egypt
| | - Mohamed A Morsy
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia, Egypt.
| | - Marwa M Mahmoud
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia, Egypt
| | - Rehab A Rifaai
- Department of Histology, Faculty of Medicine, Minia University, El-Minia, Egypt
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Oo ZY, Kandasamy K, Tasnim F, Zink D. A novel design of bioartificial kidneys with improved cell performance and haemocompatibility. J Cell Mol Med 2013; 17:497-507. [PMID: 23480720 PMCID: PMC3822650 DOI: 10.1111/jcmm.12029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 12/28/2012] [Indexed: 12/12/2022] Open
Abstract
Treatment with bioartificial kidneys had beneficial effects in animal experiments and improved survival of critically ill patients with acute kidney injury in a Phase II clinical trial. However, a Phase II b clinical trial failed. This and other results suggested various problems with the current design of bioartificial kidneys. We propose a novel design to improve various properties of device, including haemocompatibility and cell performance. An important feature of the novel design is confinement of the blood to the lumina of the hollow fibre membranes. This avoids exposure of the blood to the non-haemocompatible outer surfaces of hollow fibre membranes, which usually occurs in bioartificial kidneys. We use these outer surfaces as substrate for cell growth. Our results show that commercial hollow fibre membranes can be directly applied in the bioreactor when human primary renal proximal tubular cells are grown in this configuration, and no coatings are required for the formation of robust and functional renal epithelia. Furthermore, we demonstrate that the bioreactor unit produces significant amounts of interleukins. This result helps to understand the immunomodulatory effects of bioartificial kidneys, which have been observed previously. The novel bioartificial kidney design outlined here and the results obtained would be expected to improve the safety and performance of bioartificial kidneys and to contribute to a better understanding of their effects.
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Affiliation(s)
- Zay Yar Oo
- Institute of Bioengineering and Nanotechnology, The Nanos, Singapore 138669, Singapore
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7
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Nibourg GAA, Chamuleau RAFM, van Gulik TM, Hoekstra R. Proliferative human cell sources applied as biocomponent in bioartificial livers: a review. Expert Opin Biol Ther 2012; 12:905-21. [DOI: 10.1517/14712598.2012.685714] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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8
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Saito A, Sawada K, Fujimura S. Present status and future perspectives on the development of bioartificial kidneys for the treatment of acute and chronic renal failure patients. Hemodial Int 2011; 15:183-92. [PMID: 21395969 DOI: 10.1111/j.1542-4758.2011.00530.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A bioartificial renal tubule device (BTD) consisting of a hollow-fiber module and human proximal tubular epithelial cells has been completed technically by Humes and colleagues and a few other groups. Humes and colleagues developed BTD, treated acute kidney injury patients with multiorgan failure by continuous hemofiltration (CHF) in conjunction with BTD, and reported a significantly higher survival rate than that by CHF with BTD without cells in the Food and Drug Administration phase IIa trial. However, BTD has never been approved by the US Government, as the CHF+BTD treatment did not show a significant difference from the control group in the phase IIb trial. Human proximal tubular epithelial cells were confirmed to be overgrown on artificial membrane, which resulted in the inhibition of active transports and the metabolism of essential substances. Function of the BTD could be maintained in a U0126-contained medium, even if the BTD had to have been waited by a new acute kidney injury patient for several weeks. For wearable kidneys, heparin-covalently bound membrane or methacryloyloxyethyl phosphorylcholine (MPC) polymer-coated membranes are candidates for antithrombogenic hemofilters, while endothelial progenitor cells from a cord blood, CD133(+) cells-attached hemofilter in which the permeability of the cells was enhanced by the enlarged diameter of fenestrae by treating with cytochalasin B are another candidate. The MPC blend membrane containing 1% of the MPC polymer in polysulfone was developed as a BTD module. MPC was 7 times larger at the sponge layer than at the skin layer of the membrane, resulting in hemocompatibility at the sponge layer and cytocompatibility at the skin layer.
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Affiliation(s)
- Akira Saito
- Department of Medicine, Division of Nephrology and Metabolism, Tokai University School of Medicine, Isehara, Japan.
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9
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P-glycoprotein is functionally expressed in the placenta-derived bovine caruncular epithelial cell line 1 (BCEC-1). Placenta 2011; 32:146-52. [DOI: 10.1016/j.placenta.2010.11.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 11/09/2010] [Accepted: 11/10/2010] [Indexed: 01/16/2023]
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10
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Tasnim F, Deng R, Hu M, Liour S, Li Y, Ni M, Ying JY, Zink D. Achievements and challenges in bioartificial kidney development. FIBROGENESIS & TISSUE REPAIR 2010; 3:14. [PMID: 20698955 PMCID: PMC2925816 DOI: 10.1186/1755-1536-3-14] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 08/10/2010] [Indexed: 12/23/2022]
Abstract
Bioartificial kidneys (BAKs) combine a conventional hemofilter in series with a bioreactor unit containing renal epithelial cells. The epithelial cells derived from the renal tubule should provide transport, metabolic, endocrinologic and immunomodulatory functions. Currently, primary human renal proximal tubule cells are most relevant for clinical applications. However, the use of human primary cells is associated with many obstacles, and the development of alternatives and an unlimited cell source is one of the most urgent challenges. BAKs have been applied in Phase I/II and Phase II clinical trials for the treatment of critically ill patients with acute renal failure. Significant effects on cytokine concentrations and long-term survival were observed. A subsequent Phase IIb clinical trial was discontinued after an interim analysis, and these results showed that further intense research on BAK-based therapies for acute renal failure was required. Development of BAK-based therapies for the treatment of patients suffering from end-stage renal disease is even more challenging, and related problems and research approaches are discussed herein, along with the development of mobile, portable, wearable and implantable devices.
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Affiliation(s)
- Farah Tasnim
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
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11
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Saito A, Aung T, Sekiguchi K, Sato Y, Vu DM, Inagaki M, Kanai G, Tanaka R, Suzuki H, Kakuta T. Present status and perspectives of bioartificial kidneys. J Artif Organs 2006; 9:130-5. [PMID: 16998696 DOI: 10.1007/s10047-006-0336-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Accepted: 04/18/2006] [Indexed: 11/26/2022]
Abstract
Currently, hemodialysis is not adequate as a renal replacement therapy because it provides intermittent treatment and does not provide the metabolic function of renal tubules. The next generation of artificial kidney should replace intermittent hemodialysis with continuous hemofiltration and provide the full metabolic function of renal tubules. The current decade has witnessed the development of bioartificial kidneys using artificial membranes and renal tubular epithelial cells. Active transport and metabolic functions were confirmed in the confluent monolayers of tubular cells on artificial membranes. Bioartificial kidneys have succeeded in improving the prognosis of patients with multiple organ dysfunction, presumably by lowering plasma cytokine levels in patients. For successful treatment of chronic renal failure using bioartificial kidneys, it is necessary to overcome some technical hurdles such as improving the antithrombogenic properties of the surface of artificial membranes and prolonging the function of renal tubule cells on an artificial membrane. Transfection of functional protein genes into renal tubule cells enables bioartificial tubule devices to increase their transport capacity and metabolic functions such as digoxin secretion and water transport. The development of wearable roller pumps is also essential for the clinical application of a continuous treatment system.
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Affiliation(s)
- Akira Saito
- Division of Nephrology, Department of Medicine, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa 259-1193, Japan.
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12
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Tsuruoka S, Nishiki K, Wakaumi M, Wang N, Yamamoto H, Ando H, Imai M, Fujimura A. Treatment of digoxin intoxication model by hybrid-kidney with hollowfibre module for clinical haemodialysis. Nephrol Dial Transplant 2004; 19:1339-40. [PMID: 15102990 DOI: 10.1093/ndt/gfh135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Abstract
Bioartificial kidneys, which consist of continuous haemofiltration and bioartificial tubules using tubular epithelial cells, have been studied since 1987. The bioartificial tubules consist of hollow fibre modules and tubular epithelial cells grown on the hollow fibre membranes after coating with extracellular matrices. The kinds of tubular epithelial cells, extracellular matrices and artificial membranes therefore have been investigated and then the most appropriate cell and materials have been selected on the basis of the development of bioartificial kidneys. Successful seeding to form confluent monolayers on the surfaces of hollow fibers is not easy, but this method has already been established. Renal assist devices using human renal proximal tubular epithelial cells have been used in the treatment of acute renal failure patients with endotoxemia by Humes et al., and successful treatment of acute renal failure patients with these devices was reported in 2001 and 2002, in which the improved mortality rate of those patients was shown. A bioartificial kidney, in which cDNA of multidrug resistance protein-1 was transfected into tubular epithelial cells that were then grown on the outer surfaces of hollow fibers, was used in the experimental treatment of digoxin-intoxicated dogs. Rapidly reduced digoxin levels were noted in the plasma of the dogs after treatment. Bioartificial kidneys, however, have never been used in the long-term treatment of a maintenance dialysis patient, although patients need those kidneys. In order to establish long-term treatment with a bioartificial kidney, each haemofilter has to function for more than one week without systemic anticoagulation and a bioartificial tubule must function for 3-4 weeks.
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Affiliation(s)
- Akira Saito
- Institute of Medical Science, Tokai University, Japan.
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Tsuruoka S, Ishibashi K, Yamamoto H, Wakaumi M, Suzuki M, Schwartz GJ, Imai M, Fujimura A. Functional analysis of ABCA8, a new drug transporter. Biochem Biophys Res Commun 2002; 298:41-5. [PMID: 12379217 DOI: 10.1016/s0006-291x(02)02389-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We examined the transport capacity in Xenopus laevis oocytes of human EST KIAA0822/ABCA8, a member of the ABC superfamily. Substrates of ABCC2/MRP-2 such as [14C]estradiol-beta-glucuronide, taurocholate, and LTC4, and of organic anion transporter (OAT), such as para-aminohippuric acid, ochratoxin-A, were significantly accumulated while tetraethylammonium and doxorubicin were not. The transport of [14C]estradiol-beta-glucuronide was ATP-dependent and K(m) and V(max) values of 30.4microM and 66.9pmol/h/egg, respectively, were estimated. The transport of [14C]estradiol-beta-glucuronide was inhibited by substrates/inhibitors of ABCC2/MRP-2, but not by those of the organic cation transporter and multidrug resistance protein (MDR)-1. KIAA0822/ABCA8 possesses two ATP-binding sites and fourteen transmembrane domains. Northern blot analysis revealed expression in most organs, especially in heart, skeletal muscle, and liver. Thus, ABCA8 is a new member of the xenobiotic transporter ABC-subfamily.
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Affiliation(s)
- Shuichi Tsuruoka
- Department of Clinical Pharmacology, Jichi Medical School, 3311 Yakushiji, Minamikawachi, Kawachi, Tochigi 329-0498, Japan.
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Tsuruoka S, Nishiki K, Sugimoto K, Suzuki M, Imai M, Fujimura A. Specific therapy of digoxin intoxication in dogs by hybrid kidney overexpressing multidrug resistance protein. Kidney Int 2002; 62:1332-7. [PMID: 12234303 DOI: 10.1111/j.1523-1755.2002.kid570.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND We have recently developed a unique hybrid artificial kidney, where the proximal tubular cell line, over-expressing multidrug resistance protein, MDR-1 (PCTL-MDR), was cultured on hollow fibers. While this module efficiently removed digoxin in vitro, its efficacy in vivo remained to be determined. METHODS The system was scaled up by connecting 10 similar modules in parallel, with the MDR-1 (PCTL-MDR) overexpressed proximal tubular cell line cultured as in our previous study. The system was connected to dogs intoxicated with digoxin, a representative substrate of MDR-1. Blood was circulated for 90 minutes through the system. Arterial and venous blood concentrations of digoxin and inulin were monitored. Complete blood cell count and granulocyte elastase were measured before and at the end of the study. RESULTS By using the system with PCTL-MDR, the arterial digoxin concentration was dramatically decreased from 2.89 +/- 0.10 to 0.92 +/- 0.11 ng/mL, but not by the system with PCTL alone. The clearance was 22.4 +/- 2.1 and 1.5 +/- 0.2 mL/min for the PCTL-MDR and PCTL equipment, respectively. Inulin was not transported in either system. White blood cell and platelet counts were slightly reduced by the treatment while hematocrit was unchanged; the granulocyte elastase concentration was slightly increased. CONCLUSION These data suggest that our new type of hybrid kidney can selectively remove digoxin sufficiently to reduce its systemic blood concentration in dogs with digoxin intoxication. Taking previous studies into consideration, this system may be a more powerful tool for the treatment of intoxication.
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Affiliation(s)
- Shuichi Tsuruoka
- Department of Clinical Pharmacology, Jichi Medical School, 3311 Yakushiji, Minamikawachi, Kawachi, Tochigi 329-0498, Japan.
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Endo M, Enosawa S, Ozaki M, Tsuruoka S, Hiramatsu S, Kim K, Omasa T, Matsumura T, Aoki T, Koyanagi Y, Suzuki S. Artificial mimicking of physiological active transport by a membrane co-cultured with two different cells: hepatic origin HepG2 and renal origin PCTL-MDR. Artif Organs 2002; 26:806-11. [PMID: 12197938 DOI: 10.1046/j.1525-1594.2002.06997.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We designed a membrane culture unit on which 2 different cell lines were co-cultured to achieve selective and active transport of toxins. Hepatic origin HepG2 and renal origin multidrug-resistant gene-transduced proximal convoluted tubular cell line (PCTL-MDR) were cultured on the opposite sides of an expanded polytetrafluoroethylene membrane. The activity of testosterone hydroxylation by original HepG2 was very low; however, the cytochrome p450 (CYP) 3A4-transduced recombinant HepG2 metabolized the substrate efficiently. Testosterone added into the outer medium was hydrolyzed by HepG2, and the metabolites were preferentially transported to the inner medium by PCTL-MDR. [3H]-digoxin and [14C]-inulin were added to the outer medium; the digoxin was transported from the outer to inner space through the cell monolayer but the inulin was not, suggesting that the membrane actively transported only the substrate of the channel protein, MDR. The cells were irradiated (10 Gy) to prevent a membrane leak due to overgrowth. The irradiation did not induce apoptosis but resulted in long-lasting membrane function without leakage. The membrane co-cultured with hepatic and renal origin cells will enable a novel hemofiltration system with selective and active transport activities.
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Affiliation(s)
- Mitsufumi Endo
- Department of Regeneration Surgery, National Center for Child Health and Development, Tokyo, Japan
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17
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Coculture of hepatic and renal origin cell lines provides biohemofiltration with an active transport system of xenobiotics metabolites. J Artif Organs 2001. [DOI: 10.1007/bf02480028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Enosawa S, Miyashita T, Li XK, Suzuki S, Amemiya H, Omasa T, Suga K, Matsumura T. A bioreactor with glutamine synthetase-transfected recombinant HepG2 cells exhibits ammonia removal activity without the need for added cofactors and substrates: Advantage of a cellular bioreactor over enzyme-immobilized beads. J Artif Organs 2001. [DOI: 10.1007/bf02480030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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