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Court MH, Zhang X, Ding X, Yee KK, Hesse LM, Finel M. Quantitative distribution of mRNAs encoding the 19 human UDP-glucuronosyltransferase enzymes in 26 adult and 3 fetal tissues. Xenobiotica 2011; 42:266-77. [DOI: 10.3109/00498254.2011.618954] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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102
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Okyar A, Piccolo E, Ahowesso C, Filipski E, Hossard V, Guettier C, La Sorda R, Tinari N, Iacobelli S, Lévi F. Strain- and sex-dependent circadian changes in abcc2 transporter expression: implications for irinotecan chronotolerance in mouse ileum. PLoS One 2011; 6:e20393. [PMID: 21674030 PMCID: PMC3108586 DOI: 10.1371/journal.pone.0020393] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 04/27/2011] [Indexed: 11/19/2022] Open
Abstract
Background ATP-binding cassette transporter abcc2 is involved in the cellular efflux of irinotecan. The drug is toxic for mouse ileum, where abcc2 is highly expressed. Here, we investigate whether circadian changes in local abcc2 expression participate in the circadian rhythm of irinotecan toxicity for ileum mucosa, and further assess whether genetic background or sex modify this relation. Methodology/Principal Findings Ileum mucosa was obtained every 3–4 h for 24 h in male and female B6D2F1 and B6CBAF1 mice synchronized with light from Zeitgeber Time (ZT)0 to ZT12 alternating with 12 h of darkness. Irinotecan (50 mg/kg i.v. daily for 4 days) was administered at the sex- and strain-specific times corresponding to least (ZT11-15) or largest drug-induced body weight loss (ZT23-03-07). Abcc2 expression was determined with qRT-PCR for mRNA and with immunohistochemistry and confocal microscopy for protein. Histopathologic lesions were graded in ileum tissues obtained 2, 4 or 6 days after treatment. Two- to six-fold circadian changes were demonstrated for mRNA and protein mean expressions of abcc2 in mouse ileum (p<0.05). ZT12 corresponded to high mRNA and protein expressions, with circadian waveforms differing according to genetic background and sex. The proportion of mice spared from ileum lesions varied three-fold according to irinotecan timing, with best tolerability at ZT11-15 (p = 0.00003). Irinotecan was also best tolerated in males (p = 0.05) and in B6CBAF1 (p = 0.0006). Conclusions/Significance Strain- and sex-dependent circadian patterns in abcc2 expressions displayed robust relations with the chronotolerance of ileum mucosa for irinotecan. This finding has strong potential implications for improving the intestinal tolerability of anticancer drugs through circadian delivery.
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Affiliation(s)
- Alper Okyar
- INSERM, U776 Rythmes Biologiques et Cancers, Hôpital Paul Brousse, Villejuif, France
- Université Paris-Sud, UMR-S0776, Orsay, France
- Department of Pharmacology, Istanbul University Faculty of Pharmacy, Beyazit, Istanbul, Turkey
| | - Enza Piccolo
- Consorzio Interuniversitario Nazionale per la Bioncologia (CINBO) CE.S.I. - Università “G. d'Annunzio”, Chieti, Italy
| | - Constance Ahowesso
- INSERM, U776 Rythmes Biologiques et Cancers, Hôpital Paul Brousse, Villejuif, France
- Université Paris-Sud, UMR-S0776, Orsay, France
| | - Elisabeth Filipski
- INSERM, U776 Rythmes Biologiques et Cancers, Hôpital Paul Brousse, Villejuif, France
- Université Paris-Sud, UMR-S0776, Orsay, France
| | - Virginie Hossard
- INSERM, U776 Rythmes Biologiques et Cancers, Hôpital Paul Brousse, Villejuif, France
- Université Paris-Sud, UMR-S0776, Orsay, France
| | - Catherine Guettier
- Assistance Publique-Hôpitaux de Paris, Laboratoire d'Anatomie et Cytologie Pathologiques, Hôpital Paul Brousse, Villejuif, France
| | - Rosanna La Sorda
- Consorzio Interuniversitario Nazionale per la Bioncologia (CINBO) CE.S.I. - Università “G. d'Annunzio”, Chieti, Italy
| | - Nicola Tinari
- Consorzio Interuniversitario Nazionale per la Bioncologia (CINBO) CE.S.I. - Università “G. d'Annunzio”, Chieti, Italy
| | - Stefano Iacobelli
- Consorzio Interuniversitario Nazionale per la Bioncologia (CINBO) CE.S.I. - Università “G. d'Annunzio”, Chieti, Italy
| | - Francis Lévi
- INSERM, U776 Rythmes Biologiques et Cancers, Hôpital Paul Brousse, Villejuif, France
- Université Paris-Sud, UMR-S0776, Orsay, France
- Assistance Publique-Hôpitaux de Paris, Unité de Chronothérapie, Département de Cancérologie, Hôpital Paul Brousse, Villejuif, France
- * E-mail:
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103
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Haenisch S, Laechelt S, Bruckmueller H, Werk A, Noack A, Bruhn O, Remmler C, Cascorbi I. Down-regulation of ATP-binding cassette C2 protein expression in HepG2 cells after rifampicin treatment is mediated by microRNA-379. Mol Pharmacol 2011; 80:314-20. [PMID: 21540293 DOI: 10.1124/mol.110.070714] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
microRNAs (miRNAs), which contribute to the post-transcriptional processing through 3'-untranslated region-interference, have been shown to be involved in the regulation of ATP-binding cassette (ABC) membrane transporters. The aim of this study was to investigate whether ABCC2, an important efflux transporter for various endogenous and exogenous compounds at several compartment barriers, is subject to miRNA-mediated post-transcriptional gene regulation. We screened the expression of 377 human miRNAs in HepG2 cells after 48 h of treatment with 5 μM rifampicin [a pregnane X receptor (PXR) ligand] or vehicle using reverse transcription-polymerase chain reaction-based low-density arrays. Specific miRNA, ABCC2 mRNA, and protein expression were monitored in HepG2 cells undergoing rifampicin treatment for 72 h. Loss- and gain-of-function experiments and reporter gene assays were performed for further confirmation. Highly deregulated miRNAs compared with in silico data revealed miRNA (miR) 379 as candidate miRNA targeting ABCC2 mRNA. Under rifampicin treatment, ABCC2 mRNA increased significantly, with a maximal fold change of 1.56 ± 0.43 after 24 h. In addition, miR-379 increased (maximally 4.10 ± 1.33-fold after 48 h), whereas ABCC2 protein decreased with a maximal fold change of 0.47 ± 0.08 after 72 h. In contrast, transfection of miR-379 inhibitor led to an elevation of ABCC2 protein expression after rifampicin incubation for 48 h. We identify a miRNA negatively regulating ABCC2 on the post-transcriptional level and provide evidence that this miRNA impedes overexpression of ABCC2 protein after a PXR-mediated external transcriptional stimulus in HepG2 cells.
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Affiliation(s)
- Sierk Haenisch
- Institute for Experimental and Clinical Pharmacology, University Hospital Schleswig-Holstein, Bldg. 30, Arnold-Heller-Str. 3, D-24105 Kiel, Germany
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McConnell RE, Benesh AE, Mao S, Tabb DL, Tyska MJ. Proteomic analysis of the enterocyte brush border. Am J Physiol Gastrointest Liver Physiol 2011; 300:G914-26. [PMID: 21330445 PMCID: PMC3094140 DOI: 10.1152/ajpgi.00005.2011] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The brush border domain at the apex of intestinal epithelial cells is the primary site of nutrient absorption in the intestinal tract and the primary surface of interaction with microbes that reside in the lumen. Because the brush border is positioned at such a critical physiological interface, we set out to create a comprehensive list of the proteins that reside in this domain using shotgun mass spectrometry. The resulting proteome contains 646 proteins with diverse functions. In addition to the expected collection of nutrient processing and transport components, we also identified molecules expected to function in the regulation of actin dynamics, membrane bending, and extracellular adhesion. These results provide a foundation for future studies aimed at defining the molecular mechanisms underpinning brush border assembly and function.
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Affiliation(s)
| | | | - Suli Mao
- Departments of 1Cell and Developmental Biology and
| | - David L. Tabb
- 2Biomedical Informatics, Vanderbilt University Medical Center, Nashville, Tennessee
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105
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Dysfunction of the heme recycling system in heme oxygenase 1-deficient mice: effects on macrophage viability and tissue iron distribution. Blood 2010; 116:6054-62. [PMID: 20844238 DOI: 10.1182/blood-2010-03-272138] [Citation(s) in RCA: 196] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
To better understand the tissue iron overload and anemia previously reported in a human patient and mice that lack heme oxygenase-1 (HO-1), we studied iron distribution and pathology in HO-1(Hmox1)(-/-) mice. We found that resident splenic and liver macrophages were mostly absent in HO-1(-/-) mice. Erythrophagocytosis caused the death of HO-1(-/-) macrophages in in vitro experiments, supporting the hypothesis that HO-1(-/-) macrophages died of exposure to heme released on erythrophagocytosis. Rupture of HO-1(-/-) macrophages in vivo and release of nonmetabolized heme probably caused tissue inflammation. In the spleen, initial splenic enlargement progressed to red pulp fibrosis, atrophy, and functional hyposplenism in older mice, recapitulating the asplenia of an HO-1-deficient patient. We postulate that the failure of tissue macrophages to remove senescent erythrocytes led to intravascular hemolysis and increased expression of the heme and hemoglobin scavenger proteins, hemopexin and haptoglobin. Lack of macrophages expressing the haptoglobin receptor, CD163, diminished the ability of haptoglobin to neutralize circulating hemoglobin, and iron overload occurred in kidney proximal tubules, which were able to catabolize heme with HO-2. Thus, in HO-1(-/-) mammals, the reduced function and viability of erythrophagocytosing macrophages are the main causes of tissue damage and iron redistribution.
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