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Alta RYP, Vitorino HA, Goswami D, Terêsa Machini M, Espósito BP. Triphenylphosphonium-desferrioxamine as a candidate mitochondrial iron chelator. Biometals 2017; 30:709-718. [PMID: 28770399 DOI: 10.1007/s10534-017-0039-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 07/05/2017] [Accepted: 07/28/2017] [Indexed: 12/13/2022]
Abstract
Cell-impermeant iron chelator desferrioxamine (DFO) can have access to organelles if appended to suitable vectors. Mitochondria are important targets for the treatment of iron overload-related neurodegenerative diseases. Triphenylphosphonium (TPP) is a delocalized lipophilic cation used to ferry molecules to mitochondria. Here we report the synthesis and characterization of the conjugate TPP-DFO as a mitochondrial iron chelator. TPP-DFO maintained both a high affinity for iron and the antioxidant activity when compared to parent DFO. TPP-DFO was less toxic than TPP alone to A2780 cells (IC50 = 135.60 ± 1.08 and 4.34 ± 1.06 μmol L-1, respectively) and its native fluorescence was used to assess its mitochondrial localization (Rr = +0.56). These results suggest that TPP-DFO could be an interesting alternative for the treatment of mitochondrial iron overload e.g. in Friedreich's ataxia.
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Affiliation(s)
- Roxana Y P Alta
- Laboratory of Bioinorganic Chemistry and Metallodrugs, Department of Fundamental Chemistry, University of São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, São Paulo, Brazil. .,Laboratory of Peptide Chemistry, Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Professor Lineu Prestes 748, São Paulo, 05508-000, São Paulo, Brazil.
| | - Hector A Vitorino
- Laboratory of Bioinorganic Chemistry and Metallodrugs, Department of Fundamental Chemistry, University of São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, São Paulo, Brazil
| | | | - M Terêsa Machini
- Laboratory of Peptide Chemistry, Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Professor Lineu Prestes 748, São Paulo, 05508-000, São Paulo, Brazil
| | - Breno P Espósito
- Laboratory of Bioinorganic Chemistry and Metallodrugs, Department of Fundamental Chemistry, University of São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, São Paulo, Brazil
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Vitorino HA, Alta RYP, Alta ECP, Ortega P. Erratum to: Hepatopancreatic cells of a stone crab Menippe frontalis from Perú: separation, viability study, and evaluation of lipoperoxidation against cadmium contamination. In Vitro Cell Dev Biol Anim 2017; 53:782. [PMID: 28699137 DOI: 10.1007/s11626-017-0182-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- H A Vitorino
- Center of Natural and Human Sciences, Federal University of ABC, Santo André, Brazil
| | - R Y P Alta
- Faculty of Science, National University of Engineering, Lima, Peru
| | - E C P Alta
- Faculty of Science, National University of Engineering, Lima, Peru
| | - P Ortega
- Bioscience Institute, University of São Paulo, São Paulo, Brazil.
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Alta RYP, Vitorino HA, Goswami D, Liria CW, Wisnovsky SP, Kelley SO, Machini MT, Espósito BP. Mitochondria-penetrating peptides conjugated to desferrioxamine as chelators for mitochondrial labile iron. PLoS One 2017; 12:e0171729. [PMID: 28178347 PMCID: PMC5298241 DOI: 10.1371/journal.pone.0171729] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/24/2017] [Indexed: 12/16/2022] Open
Abstract
Desferrioxamine (DFO) is a bacterial siderophore with a high affinity for iron, but low cell penetration. As part of our ongoing project focused on DFO-conjugates, we synthesized, purified, characterized and studied new mtDFOs (DFO conjugated to the Mitochondria Penetrating Peptides TAT49-57, 1A, SS02 and SS20) using a succinic linker. These new conjugates retained their strong iron binding ability and antioxidant capacity. They were relatively non toxic to A2780 cells (IC50 40–100 μM) and had good mitochondrial localization (Rr +0.45 –+0.68) as observed when labeled with carboxy-tetramethylrhodamine (TAMRA) In general, mtDFO caused only modest levels of mitochondrial DNA (mtDNA) damage. DFO-SS02 retained the antioxidant ability of the parent peptide, shown by the inhibition of mitochondrial superoxide formation. None of the compounds displayed cell cycle arrest or enhanced apoptosis. Taken together, these results indicate that mtDFO could be promising compounds for amelioration of the disease symptoms of iron overload in mitochondria.
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Affiliation(s)
- Roxana Y. P. Alta
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Hector A. Vitorino
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | | | - Cleber W. Liria
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Simon P. Wisnovsky
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada
| | - Shana O. Kelley
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada
- Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - M. Terêsa Machini
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- * E-mail: (MTM); (BPE)
| | - Breno P. Espósito
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- * E-mail: (MTM); (BPE)
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Goswami D, Vitorino HA, Alta RYP, Silvestre DM, Nomura CS, Machini MT, Espósito BP. Deferasirox-TAT(47-57) peptide conjugate as a water soluble, bifunctional iron chelator with potential use in neuromedicine. Biometals 2015; 28:869-77. [PMID: 26164834 DOI: 10.1007/s10534-015-9873-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 06/15/2015] [Accepted: 06/28/2015] [Indexed: 11/25/2022]
Abstract
Deferasirox (DFX), an orally active and clinically approved iron chelator, is being used extensively for the treatment of iron overload. However, its water insolubility makes it cumbersome for practical use. In addition to this, the low efficacy of DFX to remove brain iron prompted us to synthesize and evaluate a DFX-TAT(47-57) peptide conjugate for its iron chelation properties and permeability across RBE4 cell line, an in vitro model of the blood-brain barrier. The water-soluble conjugate was able to remove labile iron from buffered solution as well as from iron overloaded sera, and the permeability of DFX-TAT(47-57) conjugate into RBE4 cells was not affected compared to parent deferasirox. The iron bound conjugate was also able to translocate through the cell membrane.
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Affiliation(s)
- Dibakar Goswami
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
- Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - Hector A Vitorino
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
| | - Roxana Y P Alta
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
| | - Daniel M Silvestre
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
| | - Cassiana S Nomura
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
| | - M Teresa Machini
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil
| | - Breno P Espósito
- Departamento de Química Fundamental, Universidade de São Paulo, Av. Lineu Prestes 748, São Paulo, 05508-000, Brazil.
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