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Sardelli G, Scali V, Signore G, Balestri F, Cappiello M, Mura U, Del Corso A, Moschini R. Response of a Human Lens Epithelial Cell Line to Hyperglycemic and Oxidative Stress: The Role of Aldose Reductase. Antioxidants (Basel) 2023; 12:antiox12040829. [PMID: 37107204 PMCID: PMC10135174 DOI: 10.3390/antiox12040829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/23/2023] [Accepted: 03/25/2023] [Indexed: 03/31/2023] Open
Abstract
A common feature of different types of diabetes is the high blood glucose levels, which are known to induce a series of metabolic alterations, leading to damaging events in different tissues. Among these alterations, both increased polyol pathway flux and oxidative stress are considered to play relevant roles in the response of different cells. In this work, the effect on a human lens epithelial cell line of stress conditions, consisting of exposure to either high glucose levels or to the lipid peroxidation product 4-hydroxy-2-nonenal, is reported. The occurrence of osmotic imbalance, alterations of glutathione levels, and expression of inflammatory markers was monitored. A common feature of the two stress conditions was the expression of COX-2, which, only in the case of hyperglycemic stress, occurred through NF-κB activation. In our cell model, aldose reductase activity, which is confirmed as the only activity responsible for the osmotic imbalance occurring in hyperglycemic conditions, seemed to have no role in controlling the onset of the inflammatory phenomena. However, it played a relevant role in cellular detoxification against lipid peroxidation products. These results, in confirming the multifactorial nature of the inflammatory phenomena, highlight the dual role of aldose reductase as having both damaging but also protecting activity, depending on stress conditions.
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Affiliation(s)
- Gemma Sardelli
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
| | - Viola Scali
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
| | - Giovanni Signore
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Mario Cappiello
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Umberto Mura
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
- Correspondence: ; Tel.: +39-050-2211450
| | - Roberta Moschini
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
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Casertano M, Genovese M, Santi A, Pranzini E, Balestri F, Piazza L, Del Corso A, Avunduk S, Imperatore C, Menna M, Paoli P. Evidence of Insulin-Sensitizing and Mimetic Activity of the Sesquiterpene Quinone Avarone, a Protein Tyrosine Phosphatase 1B and Aldose Reductase Dual Targeting Agent from the Marine Sponge Dysidea avara. Pharmaceutics 2023; 15:pharmaceutics15020528. [PMID: 36839851 PMCID: PMC9964544 DOI: 10.3390/pharmaceutics15020528] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/18/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) is a complex disease characterized by impaired glucose homeostasis and serious long-term complications. First-line therapeutic options for T2DM treatment are monodrug therapies, often replaced by multidrug therapies to ensure that non-responding patients maintain target glycemia levels. The use of multitarget drugs instead of mono- or multidrug therapies has been emerging as a main strategy to treat multifactorial diseases, including T2DM. Therefore, modern drug discovery in its early stages aims to identify potential modulators for multiple targets; for this purpose, exploration of the chemical space of natural products represents a powerful tool. Our study demonstrates that avarone, a sesquiterpene quinone obtained from the sponge Dysidea avara, is capable of inhibiting in vitro PTP1B, the main negative regulator of the insulin receptor, while it improves insulin sensitivity, and mitochondria activity in C2C12 cells. We observe that when avarone is administered alone, it acts as an insulin-mimetic agent. In addition, we show that avarone acts as a tight binding inhibitor of aldose reductase (AKR1B1), the enzyme involved in the development of diabetic complications. Overall, avarone could be proposed as a novel natural hit to be developed as a multitarget drug for diabetes and its pathological complications.
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Affiliation(s)
- Marcello Casertano
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Massimo Genovese
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Alice Santi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Erica Pranzini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56123 Pisa, Italy
- Interdepartmental Research Center for Marine Pharmacology, Via Bonanno 6, 56126 Pisa, Italy
| | - Lucia Piazza
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56123 Pisa, Italy
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56123 Pisa, Italy
- Interdepartmental Research Center for Marine Pharmacology, Via Bonanno 6, 56126 Pisa, Italy
| | - Sibel Avunduk
- Medical Laboratory Programme, Vocational School of Health Care, Mugla University, Marmaris 48187, Turkey
| | - Concetta Imperatore
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Marialuisa Menna
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
- Correspondence: (M.M.); (P.P.); Tel.: +39-081678518 (M.M.); +39-0552751248 (P.P.)
| | - Paolo Paoli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
- Correspondence: (M.M.); (P.P.); Tel.: +39-081678518 (M.M.); +39-0552751248 (P.P.)
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Balestri F, Poli G, Piazza L, Cappiello M, Moschini R, Signore G, Tuccinardi T, Mura U, Del Corso A. Dissecting the Activity of Catechins as Incomplete Aldose Reductase Differential Inhibitors through Kinetic and Computational Approaches. Biology 2022; 11:biology11091324. [PMID: 36138801 PMCID: PMC9495972 DOI: 10.3390/biology11091324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 12/03/2022]
Abstract
Simple Summary The increased glucose levels occurring in diabetes lead to several metabolic alterations responsible for the onset of the so-called diabetic complications, which include nephropathies, neuropathies, retinopathies, and cataract. An increased flux of glucose through the polyol pathway is considered the most relevant among these alterations. For this reason, the block of the polyol pathway, through the inhibition of the enzyme aldose reductase, is considered a valuable strategy to impair the onset of diabetic complications. However, aldose reductase also exerts a beneficial effect inside cells, since it can remove toxic aldehydes. Thus, to ameliorate the outcome of the use of aldose reductase inhibitors, the use of “differential inhibitors” has been proposed. These inhibitors should block the catalytic activity depending on the substrate the enzyme is working on, thus preserving the detoxifying action of the enzyme. In this work, derivatives of catechins are analyzed to evaluate their inhibitory action on aldose reductase. The study was conducted both in vitro on the isolated enzyme and in silico through a computational approach. Results demonstrated that gallocatechin gallate and catechin gallate act as differential inhibitors and that this action may be linked to an incomplete inhibitory effect. Abstract The inhibition of aldose reductase is considered as a strategy to counteract the onset of both diabetic complications, upon the block of glucose conversion in the polyol pathway, and inflammation, upon the block of 3-glutathionyl-4-hydroxynonenal reduction. To ameliorate the outcome of aldose reductase inhibition, minimizing the interference with the detoxifying role of the enzyme when acting on toxic aldehydes, “differential inhibitors”, i.e., molecules able to inhibit the enzyme depending on the substrate the enzyme is working on, has been proposed. Here we report the characterization of different catechin derivatives as aldose reductase differential inhibitors. The study, conducted through both a kinetic and a computational approach, highlights structural constraints of catechin derivatives relevant in order to affect aldose reductase activity. Gallocatechin gallate and catechin gallate emerged as differential inhibitors of aldose reductase able to preferentially affect aldoses and 3-glutathionyl-4-hydroxynonenal reduction with respect to 4-hydroxynonenal reduction. Moreover, the results highlight how, in the case of aldose reductase, a substrate may affect not only the model of action of an inhibitor, but also the degree of incompleteness of the inhibitory action, thus contributing to differential inhibitory phenomena.
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Affiliation(s)
- Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Giulio Poli
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano 12, 56126 Pisa, Italy
| | - Lucia Piazza
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
| | - Mario Cappiello
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Roberta Moschini
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Giovanni Signore
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Tiziano Tuccinardi
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano 12, 56126 Pisa, Italy
| | - Umberto Mura
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
- Correspondence: ; Tel.: +39-050-2211450
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Balestri F, Moschini R, Mura U, Cappiello M, Del Corso A. In Search of Differential Inhibitors of Aldose Reductase. Biomolecules 2022; 12:biom12040485. [PMID: 35454074 PMCID: PMC9024650 DOI: 10.3390/biom12040485] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/14/2022] [Accepted: 03/21/2022] [Indexed: 11/22/2022] Open
Abstract
Aldose reductase, classified within the aldo-keto reductase family as AKR1B1, is an NADPH dependent enzyme that catalyzes the reduction of hydrophilic as well as hydrophobic aldehydes. AKR1B1 is the first enzyme of the so-called polyol pathway that allows the conversion of glucose into sorbitol, which in turn is oxidized to fructose by sorbitol dehydrogenase. The activation of the polyol pathway in hyperglycemic conditions is generally accepted as the event that is responsible for a series of long-term complications of diabetes such as retinopathy, cataract, nephropathy and neuropathy. The role of AKR1B1 in the onset of diabetic complications has made this enzyme the target for the development of molecules capable of inhibiting its activity. Virtually all synthesized compounds have so far failed as drugs for the treatment of diabetic complications. This failure may be partly due to the ability of AKR1B1 to reduce alkenals and alkanals, produced in oxidative stress conditions, thus acting as a detoxifying agent. In recent years we have proposed an alternative approach to the inhibition of AKR1B1, suggesting the possibility of a differential inhibition of the enzyme through molecules able to preferentially inhibit the reduction of either hydrophilic or hydrophobic substrates. The rationale and examples of this new generation of aldose reductase differential inhibitors (ARDIs) are presented.
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Affiliation(s)
- Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56127 Pisa, Italy; (F.B.); (R.M.); (U.M.); (A.D.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56127 Pisa, Italy
| | - Roberta Moschini
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56127 Pisa, Italy; (F.B.); (R.M.); (U.M.); (A.D.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56127 Pisa, Italy
| | - Umberto Mura
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56127 Pisa, Italy; (F.B.); (R.M.); (U.M.); (A.D.C.)
| | - Mario Cappiello
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56127 Pisa, Italy; (F.B.); (R.M.); (U.M.); (A.D.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56127 Pisa, Italy
- Correspondence:
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, Via S. Zeno 51, 56127 Pisa, Italy; (F.B.); (R.M.); (U.M.); (A.D.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56127 Pisa, Italy
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Casertano M, Genovese M, Piazza L, Balestri F, Del Corso A, Vito A, Paoli P, Santi A, Imperatore C, Menna M. Identifying Human PTP1B Enzyme Inhibitors from Marine Natural Products: Perspectives for Developing of Novel Insulin-Mimetic Drugs. Pharmaceuticals (Basel) 2022; 15:ph15030325. [PMID: 35337123 PMCID: PMC8950868 DOI: 10.3390/ph15030325] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 02/07/2023] Open
Abstract
Diabetes mellitus (DM) represents a complex and multifactorial disease that causes metabolic disorders with acute and long-term serious complications. The onset of DM, with over 90% of cases of diabetes classified as type 2, implies several metabolic dysfunctions leading to consider DM a worldwide health problem. In this frame, protein tyrosine phosphatase 1B (PTP1B) and aldose reductase (AR) are two emerging targets involved in the development of type 2 diabetes mellitus (T2DM) and its chronic complications. Herein, we employed a marine-derived dual type inhibitor of these enzymes, phosphoeleganin, as chemical starting point to perform a fragment-based process in search for new inhibitors. Phosphoeleganin was both disassembled by its oxidative cleavage and used as model structure for the synthesis of a small library of functionalized derivatives as rationally designed analogues. Pharmacological screening supported by in silico docking analysis outlined the mechanism of action against PTP1B exerted by a phosphorylated fragment and a synthetic simplified analogue, which represent the most potent inhibitors in the library.
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Affiliation(s)
- Marcello Casertano
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (M.C.); (A.V.); (C.I.)
| | - Massimo Genovese
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy; (M.G.); (A.S.)
| | - Lucia Piazza
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy; (L.P.); (F.B.); (A.D.C.)
| | - Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy; (L.P.); (F.B.); (A.D.C.)
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, 56123 Pisa, Italy; (L.P.); (F.B.); (A.D.C.)
| | - Alessio Vito
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (M.C.); (A.V.); (C.I.)
| | - Paolo Paoli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy; (M.G.); (A.S.)
- Correspondence: (P.P.); (M.M.); Tel.: +39-055-275-1248 (P.P.); +39-081-67-8518 (M.M.)
| | - Alice Santi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy; (M.G.); (A.S.)
| | - Concetta Imperatore
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (M.C.); (A.V.); (C.I.)
| | - Marialuisa Menna
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (M.C.); (A.V.); (C.I.)
- Correspondence: (P.P.); (M.M.); Tel.: +39-055-275-1248 (P.P.); +39-081-67-8518 (M.M.)
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Ottanà R, Paoli P, Cappiello M, Nguyen TN, Adornato I, Del Corso A, Genovese M, Nesi I, Moschini R, Naß A, Wolber G, Maccari R. In Search for Multi-Target Ligands as Potential Agents for Diabetes Mellitus and Its Complications-A Structure-Activity Relationship Study on Inhibitors of Aldose Reductase and Protein Tyrosine Phosphatase 1B. Molecules 2021; 26:molecules26020330. [PMID: 33435264 PMCID: PMC7828111 DOI: 10.3390/molecules26020330] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/05/2021] [Accepted: 01/07/2021] [Indexed: 12/31/2022] Open
Abstract
Diabetes mellitus (DM) is a complex disease which currently affects more than 460 million people and is one of the leading cause of death worldwide. Its development implies numerous metabolic dysfunctions and the onset of hyperglycaemia-induced chronic complications. Multiple ligands can be rationally designed for the treatment of multifactorial diseases, such as DM, with the precise aim of simultaneously controlling multiple pathogenic mechanisms related to the disease and providing a more effective and safer therapeutic treatment compared to combinations of selective drugs. Starting from our previous findings that highlighted the possibility to target both aldose reductase (AR) and protein tyrosine phosphatase 1B (PTP1B), two enzymes strictly implicated in the development of DM and its complications, we synthesised 3-(5-arylidene-4-oxothiazolidin-3-yl)propanoic acids and analogous 2-butenoic acid derivatives, with the aim of balancing the effectiveness of dual AR/PTP1B inhibitors which we had identified as designed multiple ligands (DMLs). Out of the tested compounds, 4f exhibited well-balanced AR/PTP1B inhibitory effects at low micromolar concentrations, along with interesting insulin-sensitizing activity in murine C2C12 cell cultures. The SARs here highlighted along with their rationalization by in silico docking experiments into both target enzymes provide further insights into this class of inhibitors for their development as potential DML antidiabetic candidates.
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Affiliation(s)
- Rosaria Ottanà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci, Polo Universitario Annunziata, 98168 Messina, Italy; (R.O.); (I.A.)
| | - Paolo Paoli
- Department of Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, University of Firenze, Viale Morgagni 50, 50134 Firenze, Italy; (P.P.); (M.G.); (I.N.)
| | - Mario Cappiello
- Department of Biology, Biochemistry Unit, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy; (M.C.); (A.D.C.); (R.M.)
| | - Trung Ngoc Nguyen
- Molecular Design Lab, Institute of Pharmacy, Freie Universität Berlin, Königin-Luisestr. 2 + 4, 14195 Berlin, Germany; (T.N.N.); (A.N.); (G.W.)
| | - Ilenia Adornato
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci, Polo Universitario Annunziata, 98168 Messina, Italy; (R.O.); (I.A.)
| | - Antonella Del Corso
- Department of Biology, Biochemistry Unit, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy; (M.C.); (A.D.C.); (R.M.)
| | - Massimo Genovese
- Department of Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, University of Firenze, Viale Morgagni 50, 50134 Firenze, Italy; (P.P.); (M.G.); (I.N.)
| | - Ilaria Nesi
- Department of Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, University of Firenze, Viale Morgagni 50, 50134 Firenze, Italy; (P.P.); (M.G.); (I.N.)
| | - Roberta Moschini
- Department of Biology, Biochemistry Unit, University of Pisa, Via S. Zeno, 51, 56123 Pisa, Italy; (M.C.); (A.D.C.); (R.M.)
| | - Alexandra Naß
- Molecular Design Lab, Institute of Pharmacy, Freie Universität Berlin, Königin-Luisestr. 2 + 4, 14195 Berlin, Germany; (T.N.N.); (A.N.); (G.W.)
| | - Gerhard Wolber
- Molecular Design Lab, Institute of Pharmacy, Freie Universität Berlin, Königin-Luisestr. 2 + 4, 14195 Berlin, Germany; (T.N.N.); (A.N.); (G.W.)
| | - Rosanna Maccari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci, Polo Universitario Annunziata, 98168 Messina, Italy; (R.O.); (I.A.)
- Correspondence: ; Tel.: +39-090-6766406
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Balestri F, Barracco V, Renzone G, Tuccinardi T, Pomelli CS, Cappiello M, Lessi M, Rotondo R, Bellina F, Scaloni A, Mura U, Del Corso A, Moschini R. Stereoselectivity of Aldose Reductase in the Reduction of Glutathionyl-Hydroxynonanal Adduct. Antioxidants (Basel) 2019; 8:antiox8100502. [PMID: 31652566 PMCID: PMC6827081 DOI: 10.3390/antiox8100502] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 12/11/2022] Open
Abstract
The formation of the adduct between the lipid peroxidation product 4-hydroxy-2-nonenal (HNE) and glutathione, which leads to the generation of 3-glutathionyl-4-hydroxynonane (GSHNE), is one of the main routes of HNE detoxification. The aldo-keto reductase AKR1B1 is involved in the reduction of the aldehydic group of both HNE and GSHNE. In the present study, the effect of chirality on the recognition by aldose reductase of HNE and GSHNE was evaluated. AKR1B1 discriminates very modestly between the two possible enantiomers of HNE as substrates. Conversely, a combined kinetic analysis of the glutathionyl adducts obtained starting from either 4R- or 4S-HNE and mass spectrometry analysis of GSHNE products obtained from racemic HNE revealed that AKR1B1 possesses a marked preference toward the 3S,4R-GSHNE diastereoisomer. Density functional theory and molecular modeling studies revealed that this diastereoisomer, besides having a higher tendency to be in an open aldehydic form (the one recognized by AKR1B1) in solution than other GSHNE diastereoisomers, is further stabilized in its open form by a specific interaction with the enzyme active site. The relevance of this stereospecificity to the final metabolic fate of GSHNE is discussed.
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Affiliation(s)
- Francesco Balestri
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
- Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, 56124 Pisa, Italy.
| | - Vito Barracco
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
| | - Giovanni Renzone
- Proteomics & Mass Spectrometry Laboratory, ISPAAM-CNR, Via Argine 1085, 80147 Napoli, Italy.
| | - Tiziano Tuccinardi
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy.
| | | | - Mario Cappiello
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
- Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, 56124 Pisa, Italy.
| | - Marco Lessi
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi, 13, 56124 Pisa, Italy.
| | - Rossella Rotondo
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
| | - Fabio Bellina
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi, 13, 56124 Pisa, Italy.
| | - Andrea Scaloni
- Proteomics & Mass Spectrometry Laboratory, ISPAAM-CNR, Via Argine 1085, 80147 Napoli, Italy.
| | - Umberto Mura
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
| | - Antonella Del Corso
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
- Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, 56124 Pisa, Italy.
| | - Roberta Moschini
- Biochemistry Unit, Department of Biology, University of Pisa, via S. Zeno 51, 56127 Pisa, Italy.
- Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, 56124 Pisa, Italy.
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Balestri F, Quattrini L, Coviello V, Sartini S, Da Settimo F, Cappiello M, Moschini R, Del Corso A, Mura U, La Motta C. Acid Derivatives of Pyrazolo[1,5-a]pyrimidine as Aldose Reductase Differential Inhibitors. Cell Chem Biol 2018; 25:1414-1418.e3. [PMID: 30122369 DOI: 10.1016/j.chembiol.2018.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 04/20/2018] [Accepted: 07/23/2018] [Indexed: 10/28/2022]
Abstract
Aldose reductase (AKR1B1), the key enzyme of the polyol pathway, plays a crucial role in the development of long-term complications affecting diabetic patients. Nevertheless, the expedience of inhibiting this enzyme to treat diabetic complications has failed, due to the emergence of side effects from compounds under development. Actually AKR1B1 is a Janus-faced enzyme which, besides ruling the polyol pathway, takes part in the antioxidant defense mechanism of the body. In this work we report the evidence that a class of compounds, characterized by a pyrazolo[1,5-a]pyrimidine core and an ionizable fragment, modulates differently the catalytic activity of the enzyme, depending on the presence of specific substrates such as sugar, toxic aldehydes, and glutathione conjugates of toxic aldehydes. The study stands out as a systematic attempt to generate aldose reductase differential inhibitors (ARDIs) intended to target long-term diabetic complications while leaving unaltered the detoxifying role of the enzyme.
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Affiliation(s)
- Francesco Balestri
- Dipartimento di Biologia, Unità di Biochimica, Università di Pisa, Via L. Ghini 13, Pisa 56126, Italy
| | - Luca Quattrini
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, Pisa 56126, Italy
| | - Vito Coviello
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, Pisa 56126, Italy
| | - Stefania Sartini
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, Pisa 56126, Italy
| | - Federico Da Settimo
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, Pisa 56126, Italy
| | - Mario Cappiello
- Dipartimento di Biologia, Unità di Biochimica, Università di Pisa, Via L. Ghini 13, Pisa 56126, Italy
| | - Roberta Moschini
- Dipartimento di Biologia, Unità di Biochimica, Università di Pisa, Via L. Ghini 13, Pisa 56126, Italy
| | - Antonella Del Corso
- Dipartimento di Biologia, Unità di Biochimica, Università di Pisa, Via L. Ghini 13, Pisa 56126, Italy
| | - Umberto Mura
- Dipartimento di Biologia, Unità di Biochimica, Università di Pisa, Via L. Ghini 13, Pisa 56126, Italy
| | - Concettina La Motta
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, Pisa 56126, Italy.
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Balestri F, Sorce C, Moschini R, Cappiello M, Misuri L, Del Corso A, Mura U. Edible vegetables as a source of aldose reductase differential inhibitors. Chem Biol Interact 2017; 276:155-159. [PMID: 28159579 DOI: 10.1016/j.cbi.2017.01.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Revised: 01/18/2017] [Accepted: 01/29/2017] [Indexed: 11/25/2022]
Abstract
The hyperactivity of aldose reductase (AR) on glucose in diabetic conditions or on glutathionyl-hydroxynonenal in oxidative stress conditions, the source of cell damage and inflammation, appear to be balanced by the detoxifying action exerted by the enzyme. This detoxification acts on cytotoxic hydrophobic aldehydes deriving from membrane peroxidative processes. This may contribute to the failure in drug development for humans to favorably intervene in diabetic complications and inflammation, despite the specificity and high efficiency of several available aldose reductase inhibitors. This paper presents additional features to a previously proposed approach, on inhibiting the enzyme through molecules able to preferentially inhibit the enzyme depending on the substrate the enzyme is working on. These differential inhibitors (ARDIs) should act on glucose reduction catalyzed by AR without little or no effect on the reduction of alkenals or alkanals. The reasons why AR may be an eligible enzyme for differential inhibition are considered. These mainly refer to the evidence that, although AR is an unspecific enzyme that recognizes different substrates such as aldoses and hydrophobic aldehydes, it nevertheless displays a certain degree of specificity among substrates of the same class. After screening on edible vegetables, indications of the presence of molecules potentially acting as ARDIs are reported.
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Affiliation(s)
| | - Carlo Sorce
- University of Pisa, Department of Biology, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy
| | - Roberta Moschini
- University of Pisa, Department of Biology, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy
| | - Mario Cappiello
- University of Pisa, Department of Biology, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy
| | - Livia Misuri
- University of Pisa, Department of Biology, Pisa, Italy; Tuscany Region PhD School in Biochemistry and Molecular Biology, Italy
| | - Antonella Del Corso
- University of Pisa, Department of Biology, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy
| | - Umberto Mura
- University of Pisa, Department of Biology, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy.
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Maggi E, Cappiello M, Del Corso A, Lenzarini F, Peroni E, Benedetti-Cecchi L. Climate-related environmental stress in intertidal grazers: scaling-up biochemical responses to assemblage-level processes. PeerJ 2016; 4:e2533. [PMID: 27781156 PMCID: PMC5075701 DOI: 10.7717/peerj.2533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/06/2016] [Indexed: 11/29/2022] Open
Abstract
Background Organisms are facing increasing levels of environmental stress under climate change that may severely affect the functioning of biological systems at different levels of organization. Growing evidence suggests that reduction in body size is a universal response of organisms to global warming. However, a clear understanding of whether extreme climate events will impose selection directly on phenotypic plastic responses and how these responses affect ecological interactions has remained elusive. Methods We experimentally investigated the effects of extreme desiccation events on antioxidant defense mechanisms of a rocky intertidal gastropod (Patella ulyssiponensis), and evaluated how these effects scaled-up at the population and assemblage levels. Results With increasing levels of desiccation stress, limpets showed significant lower levels of total glutathione, tended to grow less and had reduced per capita interaction strength on their resources. Discussion Results suggested that phenotypic plasticity (i.e., reduction in adults’ body size) allowed buffering biochemical responses to stress to scale-up at the assemblage level. Unveiling the linkages among different levels of biological organization is key to develop indicators that can anticipate large-scale ecological impacts of climate change.
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Affiliation(s)
- Elena Maggi
- Department of Biology, University of Pisa, Pisa, Italy; CoNISMa, Consorzio Nazionale Interuniversitario per le Scienze del Mare, Roma, Italy
| | | | | | | | | | - Lisandro Benedetti-Cecchi
- Department of Biology, University of Pisa, Pisa, Italy; CoNISMa, Consorzio Nazionale Interuniversitario per le Scienze del Mare, Roma, Italy
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11
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Cappiello M, Peroni E, Lepore A, Moschini R, Del Corso A, Balestri F, Mura U. Rapid colorimetric determination of reduced and oxidized glutathione using an end point coupled enzymatic assay. Anal Bioanal Chem 2012. [DOI: 10.1007/s00216-012-6577-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Ottanà R, Maccari R, Giglio M, Del Corso A, Cappiello M, Mura U, Cosconati S, Marinelli L, Novellino E, Sartini S, La Motta C, Da Settimo F. Identification of 5-arylidene-4-thiazolidinone derivatives endowed with dual activity as aldose reductase inhibitors and antioxidant agents for the treatment of diabetic complications. Eur J Med Chem 2011; 46:2797-806. [DOI: 10.1016/j.ejmech.2011.03.068] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Revised: 03/20/2011] [Accepted: 03/23/2011] [Indexed: 01/24/2023]
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Maccari R, Corso AD, Giglio M, Moschini R, Mura U, Ottanà R. In vitro evaluation of 5-arylidene-2-thioxo-4-thiazolidinones active as aldose reductase inhibitors. Bioorg Med Chem Lett 2011; 21:200-3. [DOI: 10.1016/j.bmcl.2010.11.041] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 11/04/2010] [Accepted: 11/04/2010] [Indexed: 10/18/2022]
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De Donatis GM, Moschini R, Cappiello M, Del Corso A, Mura U. Cysteinyl-glycine in the control of glutathione homeostasis in bovine lenses. Mol Vis 2010; 16:1025-33. [PMID: 20577593 PMCID: PMC2890556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2010] [Accepted: 06/01/2010] [Indexed: 11/29/2022] Open
Abstract
PURPOSE To define a possible metabolic and/or signaling role for Cys-Gly in glutathione homeostasis in bovine eye lenses. METHODS Bovine lenses were cultured up to 24 h in a medium containing 0.5 mM reduced glutathione (GSH) under different conditions. The intracellular and the extracellular contents of thiol compounds were evaluated using a free zone capillary electrophoresis method. RESULTS Culture of lenses in the presence of GSH and the gamma-glutamyl transferase inhibitor serine-borate demonstrated a 1.5 fold increase in the level of extra-lenticular glutathione with respect to the initial value. Cys-Gly exogenously added impaired the extra-lenticular accumulation of glutathione. Both cysteine and gamma-Glu-Cys were ineffective in reducing extra-lenticular glutathione accumulation. In all conditions no differences in reduced and total intra-lenticular glutathione levels were observed. CONCLUSIONS The impairment of Cys-Gly generation correlated with inhibition of gamma-glutamyl transferase by serine/borate, resulting in high extra-lenticular concentration of glutathione effluxed from the bovine lens. The possibility that Cys-Gly may intervene either in the replenishment processes for cysteine in the GSH biosynthetic step or in the function of the efflux GSH-transporters is considered.
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15
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Maccari R, Ciurleo R, Giglio M, Cappiello M, Moschini R, Corso AD, Mura U, Ottanà R. Identification of new non-carboxylic acid containing inhibitors of aldose reductase. Bioorg Med Chem 2010; 18:4049-55. [PMID: 20452228 DOI: 10.1016/j.bmc.2010.04.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 04/06/2010] [Indexed: 11/28/2022]
Abstract
Non-carboxylic acid containing bioisosteres of (5-arylidene-2,4-dioxothiazolidin-3-yl)acetic acids, which are active as aldose reductase (ALR2) inhibitors, were designed by replacing the carboxylic group with the trifluoromethyl ketone moiety. The in vitro evaluation of the ALR2 inhibitory effects of these trifluoromethyl substituted derivatives led to the identification of two inhibitors effective at low micromolar doses. It was further confirmed that a carboxylic chain on N-3 of the thiazolidinedione scaffold is a determining requisite to obtain the highest efficacy levels; however, it is not essential for the interaction with the target enzyme and it can be replaced by different polar groups, thus obtaining less ionised or unionised inhibitors.
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Affiliation(s)
- Rosanna Maccari
- Dipartimento Farmaco-chimico, University of Messina, Polo Universitario dell'Annunziata, 98168 Messina, Italy.
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16
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Franzini M, Corti A, Martinelli B, Del Corso A, Emdin M, Parenti GF, Glauber M, Pompella A, Paolicchi A. Gamma-glutamyltransferase activity in human atherosclerotic plaques--biochemical similarities with the circulating enzyme. Atherosclerosis 2008; 202:119-27. [PMID: 18486136 DOI: 10.1016/j.atherosclerosis.2008.03.023] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2007] [Revised: 03/27/2008] [Accepted: 03/28/2008] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND PURPOSE Serum gamma-glutamyltransferase (GGT) activity has been identified as a predictor of complications of atherosclerosis, with a prognostic value for cardiovascular diseases and stroke. Human atherosclerotic lesions contain active GGT, which can give rise to pro-oxidant molecular species; thus a direct contribution of GGT to atherosclerosis progression is conceivable. The relationship between plaque and serum GGT is however unclear. METHODS AND RESULTS Human carotid plaques obtained from 18 consecutive patients undergoing carotid endoarteriectomy were analyzed, of which 6 were used for anion exchange and gel filtration chromatography/western blot studies, 7 for beta-lipoprotein precipitation, and 5 for RNA extraction and determination of low molecular weight thiols. Mean GGT activity in crude plaque homogenates was 60.9+/-21.5 (S.D.) mU/g tissue. The characteristics of GGT activity were compared in plaque homogenates and in serum obtained from controls (healthy blood donors). The methods employed (anion exchange and gel chromatography, western blot) showed the presence in plaque homogenates of two distinct complexes containing GGT activity, one of which comparable with plasma LDL/GGT complexes. Accordingly, precipitation of beta-lipoproteins from plaque homogenates resulted in removal of GGT activity. RT-PCR indicated in plaques the presence of GGT mRNA transcribed from GGT-I gene. Analysis of plaque extracts also revealed the presence of enzyme product cysteinyl-glycine both as free and protein-bound form, confirming that GGT-dependent pro-oxidant reactions may occur within the plaque environment. CONCLUSIONS The results obtained suggest the presence in plaques of a serum-like GGT protein, indicating that a direct contribution of serum GGT to enzyme activity found within atherosclerotic lesions is possible. Data also indicate the occurrence of GGT-mediated redox reactions within plaque environment, which might influence plaque progression.
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Affiliation(s)
- Maria Franzini
- Department of Experimental Pathology BMIE, University of Pisa Medical School, Via Roma 55, 56126 Pisa, Italy.
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Del Corso A, Cappiello M, Buono F, Moschini R, Paolicchi A, Mura U. Colorimetric coupled enzyme assay for γ-glutamyltransferase activity using glutathione as substrate. ACTA ACUST UNITED AC 2006; 67:123-30. [PMID: 16515806 DOI: 10.1016/j.jbbm.2006.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2006] [Revised: 01/19/2006] [Accepted: 01/23/2006] [Indexed: 11/30/2022]
Abstract
A colorimetric coupled enzyme assay for the determination of gamma-glutamyltransferase (GGT) activity using glutathione as substrate is described. The cysteine released from glutathione upon sequential action of GGT and leucine aminopeptidase is spectrophotometrically detected through its reaction with ninhydrin at 100 degrees C in acidic conditions. The method was applied to the determination of the activity of both bovine kidney and human serum GGT. In the described assay conditions with final GGT concentrations ranging from 0.18 to 4 mU/ml, a linear relationship between produced cysteine and incubation times up to 90 min was observed. When a standard chromogenic assay for GGT using L-gamma-glutamyl-3-carboxy-4-nitroanilide as substrate and the proposed assay were applied on the same serum sample a linear relationship between the two method was observed. Since the use of GSH as substrate, the proposed method can be usefully adopted for enzymological studies on GGT-related enzymes, a class of enzymes which is still waiting to be characterized.
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Affiliation(s)
- Antonella Del Corso
- Dipartimento di Biologia, Sezione di Biochimica, Università di Pisa, via S. Zeno, 51, 56100 Pisa, Italy.
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19
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Moschini R, Marini I, Malerba M, Cappiello M, Del Corso A, Mura U. Chaperone-like activity of alpha-crystallin toward aldose reductase oxidatively stressed by copper ion. Arch Biochem Biophys 2006; 453:13-7. [PMID: 16615933 DOI: 10.1016/j.abb.2006.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Accepted: 03/08/2006] [Indexed: 11/17/2022]
Abstract
The protective action of alpha-crystallin against copper-induced protein stress is studied using bovine lens aldose reductase (ALR2) as protein model. The oxidative inactivation of ALR2 induced by CuCl2 at the stoichiometric Cu2+/ALR2 ratio of 2/1 [I. Cecconi, M. Moroni, P.G. Vilardo, M. Dal Monte, P. Borella, G. Rastelli, L. Costantino, D. Garland, D. Carper, J.M. Petrash, A. Del Corso, U. Mura, Biochemistry 37 (1998) 14167-14174] is accompanied by protein aggregation phenomena when the metal ion concentration is increased (Cu2+/ALR2>3). Protein oxidation precedes protein precipitation. Both inactivation and precipitation of ALR2 are prevented by alpha-crystallin in a concentration-dependent manner. The rationale for the stabilization of ALR2 exerted by alpha-crystallin at low metal concentration is given on the basis of the ability of alpha-crystallin to chelate copper. However, the overall protective action exerted by alpha-crystallin at higher copper concentration may be explained invoking the contribution of the special features of alpha-crystallin to easily interact with target proteins undergoing structural rearrangement.
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Affiliation(s)
- Roberta Moschini
- Department of Biology, Section of Biochemistry, University of Pisa, via S. Zeno, 51, 56126 Pisa, Italy
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20
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Cappiello M, Alterio V, Amodeo P, Del Corso A, Scaloni A, Pedone C, Moschini R, De Donatis GM, De Simone G, Mura U. Metal Ion Substitution in the Catalytic Site Greatly Affects the Binding of Sulfhydryl-Containing Compounds to Leucyl Aminopeptidase,. Biochemistry 2006; 45:3226-34. [PMID: 16519517 DOI: 10.1021/bi052069v] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bovine lens leucyl aminopeptidase (blLAP), a homohexameric metallopeptidase preferring bulky and hydrophobic amino acids at the N-terminus of (di)peptides, contains two Zn(2+) ions per subunit that are essential for catalytic activity. They may be replaced by other divalent cations with different exchange kinetics. The protein readily exchangeable site (site 1) can be occupied by Zn(2+), Mn(2+), Mg(2+), or Co(2+), while the tight binding site (site 2) can be occupied by Zn(2+) or Co(2+). We recently reported that introduction of Mn(2+) into site 1 generates a novel activity of blLAP toward CysGly [Cappiello, M., et al. (2004) Biochem. J. 378, 35-44], which in contrast is not hydrolyzed by the (Zn/Zn) enzyme. This finding, while disclosing a potential specific role for blLAP in glutathione metabolism, raised a question about the features required for molecules to be a substrate for the enzyme. To clarify the interaction of the enzyme with sulfhydryl-containing derivatives, (Zn/Zn)- and (Mn/Zn)blLAP forms were prepared and functional-structural studies were undertaken. Thus, a kinetic analysis of various compounds with both enzyme forms was performed; the crystal structure of (Zn/Zn)blLAP in complex with the peptidomimetic derivative Zofenoprilat was determined, and a modeling study on the CysGly-(Zn/Zn)blLAP complex was carried out. This combined approach provided insight into the interaction of blLAP with sulfhydryl-containing derivatives, showing that the metal exchange in site 1 modulates binding to these molecules that may result in enzyme substrates or inhibitors, depending on the nature of the metal.
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Affiliation(s)
- Mario Cappiello
- Department of Physiology and Biochemistry, University of Pisa, I-56126 Pisa, Italy
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21
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Dal Monte M, Del Corso A, Moschini R, Cappiello M, Amodeo P, Mura U. Zofenoprilat-glutathione mixed disulfide as a specific S-thiolating agent of bovine lens aldose reductase. Antioxid Redox Signal 2005; 7:841-8. [PMID: 15998238 DOI: 10.1089/ars.2005.7.841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The ability of Zofenoprilat, an angiotensin-converting enzyme inhibitor carrying a thiol group, to intervene in protein S-thiolation processes was tested on bovine lens aldose reductase (ALR2). Zofenoprilat, more susceptible to oxidation than glutathione (GSH), forms with this physiological thiol a rather stable mixed disulfide (ZSSG). ZSSG, whose generation through the transthiolation reaction between GSH and Zofenoprilat homodisulfide was shown to be enhanced by a micro-class glutathione S-transferase, appears to be a specific donor of the Zofenoprilat moiety in the S-thiolation processes. This is indicated by the apparent stability of ZSSG to reduction by GSH and by the specificity of the transfer of the group on ALR2, used as a protein model. Indeed, the S-thiolation of ALR2 by ZSSG occurred exclusively through the insertion of the Zofenoprilat moiety of ZSSG on the enzyme. The modified ALR2 is shown to retain the same activity of the native enzyme, but displays a reduced sensitivity to inhibition. The S-thiolation of specific target enzymes is proposed as an event potentially relevant for the antioxidant action of Zofenoprilat.
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Affiliation(s)
- Massimo Dal Monte
- Dipartimento di Fisiologia e Biochimica, Università di Pisa, Pisa, Italy
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22
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Corti A, Ferrari SM, Lazzarotti A, Del Corso A, Mura U, Casini AF, Paolicchi A. UV light increases vitamin C uptake by bovine lens epithelial cells. Mol Vis 2004; 10:533-6. [PMID: 15316465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
PURPOSE To establish whether the oxidation of ascorbic acid (AA) in the aqueous humor may contribute to maintain the high concentration of AA of the anterior eye tissues during oxidative stress. METHODS Primary cultures of bovine lens epithelial cells (BLEC) were incubated in a medium with the concentration of AA, glutathione (GSH), and cysteine (Cys) found in the aqueous humor. The intracellular concentration of AA was measured over time and compared to that of cultures maintained in the same medium but exposed to UV light. RESULTS The uptake of extracellular AA by BLEC was 0.09+/-0.01 nmol/mg protein/min, but rose to 0.53+/-0.02 nmol/mg protein/min when cell cultures were exposed to a dose of UV-C light (178 microW/cm2) capable of oxidizing extracellular AA but not intracellular AA. Under the same conditions, intracellular AA was oxidized when cell monolayers were treated with 1,3-bis(2-Chloroethyl)-1-nitrosourea (BCNU), an inhibitor of glutathione reductase and thioredoxin reductase. The uptake of the oxidized form of AA, dehydroascorbic acid (DHAA), was approximately 7 times quicker than that of AA; the uptake and intracellular reduction of DHAA to AA was inhibited by depleting intracellular GSH. Extracellular glucose inhibited the uptake of DHAA by BLEC, and the extent of this inhibition was dependent on the concentration of extracellular glucose. CONCLUSIONS During mild oxidative stress, AA contained in aqueous humor may provide tissues of the anterior eye with a source of DHAA which is readily taken up and converted to intracellular AA, while intracellular AA is maintained in the reduced status by intracellular antioxidant systems. Since glucose inhibited DHAA uptake, this protective mechanism could be impaired in diabetes.
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Affiliation(s)
- Alessandro Corti
- Dipartimento di Patologia Sperimentale, Biotecnologie Mediche, Infettivologia ed Epidemiologia, Universitá di Pisa, Pisa, Italy
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Cappiello M, Lazzarotti A, Buono F, Scaloni A, D'Ambrosio C, Amodeo P, Méndez BL, Pelosi P, Del Corso A, Mura U. New role for leucyl aminopeptidase in glutathione turnover. Biochem J 2004; 378:35-44. [PMID: 14583094 PMCID: PMC1223929 DOI: 10.1042/bj20031336] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2003] [Revised: 10/22/2003] [Accepted: 10/29/2003] [Indexed: 11/17/2022]
Abstract
A manganese-dependent cysteinyl-glycine hydrolysing activity has been purified to electrophoretic homogeneity from bovine lens. The characterization of the purified enzyme (molecular mass of the native protein, molecular mass of the subunit and extensive primary structure analysis) allowed the unequivocal attribution of the cysteinyl-glycine hydrolysing activity, which is usually associated with alanyl aminopeptidase (EC 3.4.11.2) or membrane-bound dipeptidase (EC 3.4.13.19), to LAP (leucyl aminopeptidase; EC 3.4.11.1). Analysis of the pH dependence of Cys-Gly hydrolysis catalysed by LAP, supported by a molecular modelling approach to the enzyme-substrate conformation, gave insights into the ability of the enzyme to recognize Cys-Gly as a substrate. Due to the effectiveness of LAP in hydrolysing Cys-Gly (K(m)=0.57 mM, kcat=6.0x10(3) min(-1) at pH 7.4 and 25 degrees C) with respect to other dipeptide substrates, a new role for this enzyme in glutathione turnover is proposed.
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Affiliation(s)
- Mario Cappiello
- Dipartimento di Fisiologia e Biochimica, Università di Pisa, via S. Maria 55, 56126 Pisa, Italy
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24
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Cecconi I, Scaloni A, Rastelli G, Moroni M, Vilardo PG, Costantino L, Cappiello M, Garland D, Carper D, Petrash JM, Del Corso A, Mura U. Oxidative modification of aldose reductase induced by copper ion. Definition of the metal-protein interaction mechanism. J Biol Chem 2002; 277:42017-27. [PMID: 12183464 DOI: 10.1074/jbc.m206945200] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Aldose reductase (ALR2) is susceptible to oxidative inactivation by copper ion. The mechanism underlying the reversible modification of ALR2 was studied by mass spectrometry, circular dichroism, and molecular modeling approaches on the enzyme purified from bovine lens and on wild type and mutant recombinant forms of the human placental and rat lens ALR2. Two equivalents of copper ion were required to inactivate ALR2: one remained weakly bound to the oxidized protein whereas the other was strongly retained by the inactive enzyme. Cys(303) appeared to be the essential residue for enzyme inactivation, because the human C303S mutant was the only enzyme form tested that was not inactivated by copper treatment. The final products of human and bovine ALR2 oxidation contained the intramolecular disulfide bond Cys(298)-Cys(303). However, a Cys(80)-Cys(303) disulfide could also be formed. Evidence for an intramolecular rearrangement of the Cys(80)-Cys(303) disulfide to the more stable product Cys(298)-Cys(303) is provided. Molecular modeling of the holoenzyme supports the observed copper sequestration as well as the generation of the Cys(80)-Cys(303) disulfide. However, no evidence of conditions favoring the formation of the Cys(298)-Cys(303) disulfide was observed. Our proposal is that the generation of the Cys(298)-Cys(303) disulfide, either directly or by rearrangement of the Cys(80)-Cys(303) disulfide, may be induced by the release of the cofactor from ALR2 undergoing oxidation. The occurrence of a less interactive site for the cofactor would also provide the rationale for the lack of activity of the disulfide enzyme forms.
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Affiliation(s)
- Ilaria Cecconi
- Dipartimento di Fisiologia e Biochimica, Università di Pisa, via S. Maria, 55, Italy
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Rastelli G, Costantino L, Gamberini MC, Del Corso A, Mura U, Petrash JM, Ferrari AM, Pacchioni S. Binding of 1-benzopyran-4-one derivatives to aldose reductase: a free energy perturbation study. Bioorg Med Chem 2002; 10:1427-36. [PMID: 11886805 DOI: 10.1016/s0968-0896(01)00408-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The relative binding affinities to human aldose reductase (ALR2) of three new 7-hydroxy-2-benzyl-4H-1-benzopyran-4-one inhibitors were predicted by free energy perturbation (FEP) simulations. Molecular substitutions were specifically designed to investigate the role of hydrogen bonding at the active site of ALR2. Starting from the lead inhibitor 7-hydroxy-2-(4'-hydroxybenzyl)-4H-1-benzopyran-4-one, the 4'-hydroxyl was mutated to methyl and to trifluoromethyl, and an hydroxyl at position 8 was additionally introduced. Once synthesized and tested as inhibitors of ALR2, the compounds displayed variations of K(i) that were in qualitative to quantitative agreement with the calculated relative free energies of binding. The results, discussed in terms of balance between free energies of solvation and free energies of binding to ALR2, elucidate the importance of hydrogen bonding with Thr113 and with Trp111 and cofactor, and provide a rationale to the observed differences in binding affinities.
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Affiliation(s)
- Giulio Rastelli
- Dipartimento di Scienze Farmaceutiche, Universita di Modena e Reggio Emilia, Via Campi, 183, 41100, Modena, Italy.
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Del Corso A, Vilardo PG, Cappiello M, Cecconi I, Dal Monte M, Barsacchi D, Mura U. Physiological thiols as promoters of glutathione oxidation and modifying agents in protein S-thiolation. Arch Biochem Biophys 2002; 397:392-8. [PMID: 11795899 DOI: 10.1006/abbi.2001.2678] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Glutathione is one of the most relevant antioxidants present in cells. It exerts its scavenging action through the involvement of efficient and ubiquitous enzymes. GSH on the other hand, because of its chemical features, can scavenge reactive oxygen species without the involvement of enzymatic systems. The study deals with the mobilization of GSH pool in a nonenzymatic antioxidant system by other physiological thiols (i.e., cysteine and cysteinyl-glycine), which are far more sensitive than GSH to oxidative conditions. These thiol compounds, in the presence of iron/EDTA, can promote oxygen activation through their oxidation to disulfides. GSH, through trans-thiolation reactions, can regenerate Cys and CysGly, which can then recycle, thus inducing a massive GSH oxidation. In these conditions, making use of bovine lens aldose reductase as a protein model, evidence is given that Cys and CysGly promote specific protein S-thiolation reactions. The possibility that GSH may be recruited in controlling cellular oxygen tension is considered.
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Affiliation(s)
- Antonella Del Corso
- Dipartimento di Fisiologia e Biochimica, Università di Pisa, via S. Maria 55, Pisa 56100, Italy
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Daunizeau A, Borgard JP, Corso AD, Devilliers C, Duchassaing D, Eyraud D, Feuillu A, Guillosson JJ, Kulpa M. [Recommendations for setting up and using point of care blood gas systems]. Ann Biol Clin (Paris) 2001; 59:507-10. [PMID: 11470652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- A Daunizeau
- Service de biochimie, Centre hospitalier Docteur-Schaffner, SP 8, 62307 Lens cedex
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Rastelli G, Vianello P, Barlocco D, Costantino L, Corso AD, Mura U. Structure-based design of an inhibitor modeled at the substrate active site of aldose reductase. Bioorg Med Chem Lett 1997. [DOI: 10.1016/s0960-894x(97)00321-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Corso AD, Mauri F, Rubio A. Density-functional theory of the nonlinear optical susceptibility: Application to cubic semiconductors. Phys Rev B Condens Matter 1996; 53:15638-15642. [PMID: 9983397 DOI: 10.1103/physrevb.53.15638] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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