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Touloupi K, Küblbeck J, Magklara A, Molnár F, Reinisalo M, Konstandi M, Honkakoski P, Pappas P. The Basis for Strain-Dependent Rat Aldehyde Dehydrogenase 1A7 ( ALDH1A7) Gene Expression. Mol Pharmacol 2019; 96:655-663. [PMID: 31575620 DOI: 10.1124/mol.119.117424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 09/06/2019] [Indexed: 11/22/2022] Open
Abstract
Aldehyde hydrogenases (ALDHs) belong to a large gene family involved in oxidation of both endogenous and exogenous compounds in mammalian tissues. Among ALDHs, the rat ALDH1A7 gene displays a curious strain dependence in phenobarbital (PB)-induced hepatic expression: the responsive RR strains exhibit induction of both ALDH1A7 and CYP2B mRNAs and activities, whereas the nonresponsive rr strains show induction of CYP2B only. Here, we investigated the responsiveness of ALDH1A1, ALDH1A7, CYP2B1, and CYP3A23 genes to prototypical P450 inducers, expression of nuclear receptors CAR and pregnane X receptor, and structure of the ALDH1A7 promoter in both rat strains. ALDH1A7 mRNA, associated protein and activity were strongly induced by PB and modestly induced by pregnenolone 16α-carbonitrile in the RR strain but negligibly in the rr strain, whereas induction of ALDH1A1 and P450 mRNAs was similar between the strains. Reporter gene and chromatin immunoprecipitation assays indicated that the loss of ALDH1A7 inducibility in the rr strain is profoundly linked with a 16-base pair deletion in the proximal promoter and inability of the upstream DNA sequences to recruit constitutive androstane receptor-retinoid X receptor heterodimers. SIGNIFICANCE STATEMENT: Genetic variation in rat ALDH1A7 promoter sequences underlie the large strain-dependent differences in expression and inducibility by phenobarbital of the aldehyde dehydrogenase activity. This finding has implications for the design and interpretation of pharmacological and toxicological studies on the effects and disposition of aldehydes.
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Affiliation(s)
- Katerina Touloupi
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Jenni Küblbeck
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Angeliki Magklara
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Ferdinand Molnár
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Mika Reinisalo
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Maria Konstandi
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Paavo Honkakoski
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
| | - Periklis Pappas
- Departments of Pharmacology (K.T., M.K., P.P.) and Clinical Chemistry (A.M.), Faculty of Medicine, School of Health Sciences, University of Ioannina, and Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology (A.M.), Ioannina, Greece; School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (J.K., F.M., M.R., P.H.);Department of Biology, School of Science and Technology, Nazarbayev University, Nur-Sultan City, Kazakhstan (F.M.); Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (P.H.)
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Katharopoulos E, Touloupi K, Touraki M. Monitoring of multiple bacteriocins through a developed dual extraction protocol and comparison of HPLC-DAD with turbidometry as their quantification system. J Microbiol Methods 2016; 127:123-131. [PMID: 27282100 DOI: 10.1016/j.mimet.2016.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/03/2016] [Accepted: 06/03/2016] [Indexed: 11/19/2022]
Abstract
The present study describes the development of a simple and efficient screening system that allows identification and quantification of nine bacteriocins produced by Lactococcus lactis. Cell-free L. lactis extracts presented a broad spectrum of antibacterial activity, including Gram-negative bacteria, Gram-positive bacteria, and fungi. The characterization of their sensitivity to pH, and heat, showed that the extracts retained their antibacterial activity at extreme pH values and in a wide temperature range. The loss of antibacterial activity following treatment of the extracts with lipase or protease suggests a lipoproteinaceous nature of the produced antimicrobials. The extracts were subjected to a purification protocol that employs a two phase extraction using ammonium sulfate precipitation and organic solvent precipitation, followed by ion exchange chromatography, solid phase extraction and HPLC. In the nine fractions that presented antimicrobial activity, bacteriocins were quantified by the turbidometric method using a standard curve of nisin and by the HPLC method with nisin as the external standard, with both methods producing comparable results. Turbidometry appears to be unique in the qualitative determination of bacteriocins but the only method suitable to both separate and quantify the bacteriocins providing increased sensitivity, accuracy, and precision is HPLC.
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Affiliation(s)
- Efstathios Katharopoulos
- Laboratory of General Biology, Division of Genetics, Development and Molecular Biology, Department of Biology, School of Sciences, Aristotle University of Thessaloniki (A.U.TH.), 54 124 Thessaloniki, Greece
| | - Katerina Touloupi
- Laboratory of General Biology, Division of Genetics, Development and Molecular Biology, Department of Biology, School of Sciences, Aristotle University of Thessaloniki (A.U.TH.), 54 124 Thessaloniki, Greece
| | - Maria Touraki
- Laboratory of General Biology, Division of Genetics, Development and Molecular Biology, Department of Biology, School of Sciences, Aristotle University of Thessaloniki (A.U.TH.), 54 124 Thessaloniki, Greece.
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