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Sokolov SS, Smirnova EA, Rokitskaya TI, Severin FF. The Imidazolium Ionic Liquids Toxicity is Due to Their Effect on the Plasma Membrane. BIOCHEMISTRY. BIOKHIMIIA 2024; 89:451-461. [PMID: 38648765 DOI: 10.1134/s0006297924030064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/05/2023] [Accepted: 12/15/2023] [Indexed: 04/25/2024]
Abstract
Ionic liquids (ILs) are organic salts with a low melting point. This is due to the fact that their alkyl side chains, which are covalently connected to the ion, hinder the crystallization of ILs. The low melting point of ILs has led to their widespread use as relatively harmless solvents. However, ILs do have toxic properties, the mechanism of which is largely unknown, so identifying the cellular targets of ILs is of practical importance. In our work, we showed that imidazolium ILs are not able to penetrate model membranes without damaging them. We also found that inactivation of multidrug resistance (MDR) pumps in yeast cells does not increase their sensitivity to imidazolium ILs. The latter indicates that the target of toxicity of imidazolium ILs is not in the cytoplasm. Thus, it can be assumed that the disruption of the barrier properties of the plasma membrane is the main reason for the toxicity of low concentrations of imidazolium ILs. We also showed that supplementation with imidazolium ILs restores the growth of cells with kinetically blocked glycolysis. Apparently, a slight disruption of the plasma membrane caused by ILs can, in some cases, be beneficial for the cell.
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Affiliation(s)
- Svyatoslav S Sokolov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Ekaterina A Smirnova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Fedor F Severin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
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2
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Nunes B, Cagide F, Fernandes C, Borges A, Borges F, Simões M. Efficacy of Novel Quaternary Ammonium and Phosphonium Salts Differing in Cation Type and Alkyl Chain Length against Antibiotic-Resistant Staphylococcus aureus. Int J Mol Sci 2023; 25:504. [PMID: 38203676 PMCID: PMC10778626 DOI: 10.3390/ijms25010504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Antibacterial resistance poses a critical public health threat, challenging the prevention and treatment of bacterial infections. The search for innovative antibacterial agents has spurred significant interest in quaternary heteronium salts (QHSs), such as quaternary ammonium and phosphonium compounds as potential candidates. In this study, a library of 49 structurally related QHSs was synthesized, varying the cation type and alkyl chain length. Their antibacterial activities against Staphylococcus aureus, including antibiotic-resistant strains, were evaluated by determining minimum inhibitory/bactericidal concentrations (MIC/MBC) ≤ 64 µg/mL. Structure-activity relationship analyses highlighted alkyl-triphenylphosphonium and alkyl-methylimidazolium salts as the most effective against S. aureus CECT 976. The length of the alkyl side chain significantly influenced the antibacterial activity, with optimal chain lengths observed between C10 and C14. Dose-response relationships were assessed for selected QHSs, showing dose-dependent antibacterial activity following a non-linear pattern. Survival curves indicated effective eradication of S. aureus CECT 976 by QHSs at low concentrations, particularly compounds 1e, 3e, and 5e. Moreover, in vitro human cellular data indicated that compounds 2e, 4e, and 5e showed favourable safety profiles at concentrations ≤ 2 µg/mL. These findings highlight the potential of these QHSs as effective agents against susceptible and resistant bacterial strains, providing valuable insights for the rational design of bioactive QHSs.
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Affiliation(s)
- Bárbara Nunes
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (B.N.); (A.B.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- CIQUP-IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal (C.F.); (F.B.)
| | - Fernando Cagide
- CIQUP-IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal (C.F.); (F.B.)
| | - Carlos Fernandes
- CIQUP-IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal (C.F.); (F.B.)
| | - Anabela Borges
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (B.N.); (A.B.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Fernanda Borges
- CIQUP-IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal (C.F.); (F.B.)
| | - Manuel Simões
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (B.N.); (A.B.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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3
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Mironov VF, Dimukhametov MN, Nemtarev AV, Pashirova TN, Tsepaeva OV, Voloshina AD, Vyshtakalyuk AB, Litvinov IA, Lyubina AP, Sapunova AS, Abramova DF, Zobov VV. Novel Mitochondria-Targeted Amphiphilic Aminophosphonium Salts and Lipids Nanoparticles: Synthesis, Antitumor Activity and Toxicity. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2840. [PMID: 37947686 PMCID: PMC10649961 DOI: 10.3390/nano13212840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/17/2023] [Accepted: 10/24/2023] [Indexed: 11/12/2023]
Abstract
The creation of mitochondria-targeted vector systems is a new tool for the treatment of socially significant diseases. Phosphonium groups provide targeted delivery of drugs through biological barriers to organelles. For this purpose, a new class of alkyl(diethylAmino)(Phenyl) Phosphonium halides (APPs) containing one, two, or three diethylamino groups was obtained by the reaction of alkyl iodides (bromides) with (diethylamino)(phenyl)phosphines under mild conditions (20 °C) and high yields (93-98%). The structure of APP was established by NMR and XRD. A high in vitro cytotoxicity of APPs against M-HeLa, HuTu 80, PC3, DU-145, PANC-1, and MCF-7 lines was found. The selectivity index is in the range of 0.06-4.0 μM (SI 17-277) for the most active APPs. The effect of APPs on cancer cells is characterized by hyperproduction of ROS and depolarization of the mitochondrial membrane. APPs induce apoptosis, proceeding along the mitochondrial pathway. Incorporation of APPs into lipid systems (liposomes and solid lipid nanoparticles) improves cytotoxicity toward tumor cells and decrease toxicity against normal cell lines. The IC50s of lipid systems are lower than for the reference drug DOX, with a high SI (30-56) toward MCF-7 and DU-145. APPs exhibit high selective activity against Gram-positive bacteria S. aureus 209P and B. segeus 8035, including methicillin-resistant S. aureus (MRSA-1, MRSA-2), comparable to the activity of the fluoroquinolone antibiotic norfloxacin. A moderate in vivo toxicity in CD-1 mice was established for the lead APP.
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Affiliation(s)
- Vladimir F. Mironov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 18 Kremlevskaya St., 420008 Kazan, Russia
| | - Mudaris N. Dimukhametov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Andrey V. Nemtarev
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 18 Kremlevskaya St., 420008 Kazan, Russia
| | - Tatiana N. Pashirova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Olga V. Tsepaeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Alexandra D. Voloshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Alexandra B. Vyshtakalyuk
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Igor A. Litvinov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Anna P. Lyubina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Anastasiia S. Sapunova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Dinara F. Abramova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
| | - Vladimir V. Zobov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov St., 420088 Kazan, Russia; (M.N.D.); (A.V.N.); (T.N.P.); (O.V.T.); (A.D.V.); (A.B.V.); (I.A.L.); (A.P.L.); (A.S.S.); (D.F.A.); (V.V.Z.)
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4
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Rokitskaya TI, Khailova LS, Korshunova GA, Antonenko YN. Efficiency of mitochondrial uncoupling by modified butyltriphenylphosphonium cations and fatty acids correlates with lipophilicity of cations: Protonophoric vs leakage mechanisms. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184183. [PMID: 37286154 DOI: 10.1016/j.bbamem.2023.184183] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/19/2023] [Accepted: 05/31/2023] [Indexed: 06/09/2023]
Abstract
In order to determine the share of protonophoric activity in the uncoupling action of lipophilic cations a number of analogues of butyltriphenylphosphonium with substitutions in phenyl rings (C4TPP-X) were studied on isolated rat liver mitochondria and model lipid membranes. An increase in the rate of respiration and a decrease in the membrane potential of isolated mitochondria were observed for all the studied cations, the efficiency of these processes was significantly enhanced in the presence of fatty acids and correlated with the octanol-water partition coefficient of the cations. The ability of C4TPP-X cations to induce proton transport across the lipid membrane of liposomes loaded with a pH-sensitive fluorescent dye increased also with their lipophilicity and depended on the presence of palmitic acid in the liposome membrane. Of all the cations, only butyl[tri(3,5-dimethylphenyl)]phosphonium (C4TPP-diMe) was able to induce proton transport by the mechanism of formation of a cation-fatty acid ion pair on planar bilayer lipid membranes and liposomes. The rate of oxygen consumption by mitochondria in the presence of C4TPP-diMe increased to the maximum values corresponding to conventional uncouplers; for all other cations the maximum uncoupling rates were significantly lower. We assume that the studied cations of the C4TPP-X series, with the exception of C4TPP-diMe at low concentrations, cause nonspecific leak of ions through lipid model and biological membranes which is significantly enhanced in the presence of fatty acids.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Ljudmila S Khailova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Galina A Korshunova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
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5
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Ong HC, Coimbra JTS, Ramos MJ, Xing B, Fernandes PA, García F. Beyond the TPP + "gold standard": a new generation mitochondrial delivery vector based on extended PN frameworks. Chem Sci 2023; 14:4126-4133. [PMID: 37063789 PMCID: PMC10094279 DOI: 10.1039/d2sc06508h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Mitochondrial targeting represents an attractive strategy for treating metabolic, degenerative and hyperproliferative diseases, since this organelle plays key roles in essential cellular functions. Triphenylphosphonium (TPP+) moieties - the current "gold standard" - have been widely used as mitochondrial targeting vectors for a wide range of molecular cargo. Recently, further optimisation of the TPP+ platform drew considerable interest as a way to enhance mitochondrial therapies. However, although the modification of this system appears promising, the core structure of the TPP+ moiety remains largely unchanged. Thus, this study explored the use of aminophosphonium (PN+) and phosphazenylphosphonium (PPN+) main group frameworks as novel mitochondrial delivery vectors. The PPN+ moiety was found to be a highly promising platform for this purpose, owing to its unique electronic properties and high lipophilicity. This has been demonstrated by the high mitochondrial accumulation of a PPN+-conjugated fluorophore relative to its TPP+-conjugated counterpart, and has been further supported by density functional theory and molecular dynamics calculations, highlighting the PPN+ moiety's unusual electronic properties. These results demonstrate the potential of novel phosphorus-nitrogen based frameworks as highly effective mitochondrial delivery vectors over traditional TPP+ vectors.
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Affiliation(s)
- How Chee Ong
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - João T S Coimbra
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre 687, s/n 4169-007 Porto Portugal
| | - Maria J Ramos
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre 687, s/n 4169-007 Porto Portugal
| | - Bengang Xing
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Pedro A Fernandes
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre 687, s/n 4169-007 Porto Portugal
| | - Felipe García
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo Avda Julian Claveria 8 33006 Asturias Spain
- School of Chemistry, Monash University Clayton Victoria 3800 Australia
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6
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Kirsanov RS, Khailova LS, Rokitskaya TI, Iaubasarova IR, Nazarov PA, Panteleeva AA, Lyamzaev KG, Popova LB, Korshunova GA, Kotova EA, Antonenko YN. Ester-stabilized phosphorus ylides as protonophores on bilayer lipid membranes, mitochondria and chloroplasts. Bioelectrochemistry 2023; 150:108369. [PMID: 36638678 DOI: 10.1016/j.bioelechem.2023.108369] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/19/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023]
Abstract
Triphenylphosphonium ylides are commonly used as key intermediates in the Wittig reaction. Based on the known acidities of stabilized ylide precursors, we proposed that a methylene group adjacent to phosphorus in these compounds can ensure proton shuttling across lipid membranes. Here, we synthesized (decyloxycarbonylmethyl)triphenylphosphonium bromide (CMTPP-C10) by reaction of triphenylphosphine with decyl bromoacetate. This phosphonium salt precursor of the ester-stabilized phosphorus ylide along with its octyl (CMTPP-C8) and dodecyl (CMTPP-C12) analogues was found to be a carrier of protons in mitochondrial, chloroplast and artificial lipid membranes, suggesting that it can reversibly release hydrogen ions and diffuse through the membranes in both zwitterionic (ylide) and cationic forms. The CMTPP-C10-mediated electrical current across planar bilayer lipid membranes exhibited pronounced proton selectivity. Similar to conventional protonophores, known to uncouple electron transport and ATP synthesis, CMTPP-Cn (n = 8, 10, 12) stimulated mitochondrial respiration, while decreasing membrane potential, at micromolar concentrations, thereby showing the classical uncoupling activity in mitochondria. CMTPP-C12 also caused dissipation of transmembrane pH gradient on chloroplast membranes. Importantly, CMTPP-C10 exhibited substantially lower toxicity in cell culture, than C12TPP. Thus, we report the finding of a new class of ylide-type protonophores, which is of substantial interest due to promising therapeutic properties of uncouplers.
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Affiliation(s)
- Roman S Kirsanov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Ljudmila S Khailova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Iliuza R Iaubasarova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia; Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Pavel A Nazarov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Alisa A Panteleeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Konstantin G Lyamzaev
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia; The "Russian Clinical Research Center for Gerontology" of the Ministry of Healthcare of the Russian Federation, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Lyudmila B Popova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Galina A Korshunova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Elena A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
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7
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Gruenwald H, Kerns RJ. Stability of Phenyl-Modified Triphenylphosphonium Conjugates and Interactions with DTPA. ACS OMEGA 2022; 7:48332-48339. [PMID: 36591157 PMCID: PMC9798776 DOI: 10.1021/acsomega.2c06525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Triphenylphosphonium (TPP+) conjugates are effective in targeting drugs and probes to the mitochondria due to their lipophilic character that allows them to readily cross membranes and their large cationic radius that enables mitochondrial uptake because of the mitochondria's negative membrane potential. TPP+ conjugates, while effectively sequestered by the mitochondria, are also known to uncouple oxidative phosphorylation (OXPHOS) and depolarize the mitochondrial membrane. xTPP+ conjugates with para-substitutions of functional groups on the phenyl rings of the TPP+ moiety display different levels of dose-mediated cytotoxicity due to differing potencies of uncoupling. xTPP+ conjugates having a para CF3 group substituted on the phenyl rings have been shown to afford significantly reduced uncoupling potency. In the present study, the analysis of a CF3-TPP+ conjugate with a decyl linker for stability revealed instability specific to the presence of DMSO in aqueous alkaline buffer. It is also demonstrated that the metal chelator, DTPA, forms a noncovalent protective complex with TPP+ moieties and prevents degradation of the CF3-TPP+ conjugate in aqueous DMSO. The stability of different xTPP+ conjugates and their interactions with DTPA are reported.
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8
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Rokitskaya TI, Aleksandrova EV, Korshunova GA, Khailova LS, Tashlitsky VN, Luzhkov VB, Antonenko YN. Membrane Permeability of Modified Butyltriphenylphosphonium Cations. J Phys Chem B 2022; 126:412-422. [PMID: 34994564 DOI: 10.1021/acs.jpcb.1c08135] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The alkyltriphenylphosphonium (TPP) group is the most widely used vector targeted to mitochondria. Previously, the length of the alkyl linker was varied as well as structural modifications in the TPP phenyl rings to obtain the optimal therapeutic effect of a pharmacophore conjugated with a lipophilic cation. In the present work, we synthesized butyltriphenylphosphonium cations halogenated and methylated in phenyl rings (C4TPP-X) and measured electrical current through a planar lipid bilayer in the presence of C4TPP-X. The permeability of C4TPP-X varied in the range of 6 orders of magnitude and correlates well with the previously measured translocation rate constant for dodecyltriphenylphosphonium analogues. The partition coefficient of the butyltriphenylphosphonium analogues obtained by calculating the difference in the free energy of cation solvation in water and octane using quantum chemical methods correlates well with the permeability values. Using an ion-selective electrode, a lower degree of accumulation of analogues with halogenated phenyl groups was found on isolated mitochondria of rat liver, which is in agreement with their permeability decrease. Our results indicate the translocation of the butyltriphenylphosphonium cations across the hydrophobic membrane core as rate-limiting stage in the permeability process rather than their binding/release to/from the membrane.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | | | - Galina A Korshunova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Ljudmila S Khailova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Vadim N Tashlitsky
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Victor B Luzhkov
- Department of Kinetics of Chemical and Biological Processes, Institute of Problems of Chemical Physics, Russian Academy of Sciences, acad. Semenov av. 1, Chernogolovka, Moscow Region 142432, Russia.,Department of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
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9
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Terekhova N, Khailova LS, Rokitskaya TI, Nazarov PA, Islamov DR, Usachev KS, Tatarinov DA, Mironov VF, Kotova EA, Antonenko YN. Trialkyl(vinyl)phosphonium Chlorophenol Derivatives as Potent Mitochondrial Uncouplers and Antibacterial Agents. ACS OMEGA 2021; 6:20676-20685. [PMID: 34396013 PMCID: PMC8359139 DOI: 10.1021/acsomega.1c02909] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/19/2021] [Indexed: 05/08/2023]
Abstract
Trialkyl phosphonium derivatives of vinyl-substituted p-chlorophenol were synthesized here by a recently developed method of preparing quaternary phosphonium salts from phosphine oxides using Grignard reagents. All the derivatives with a number (n) of carbon atoms in phosphonium alkyl substituents varying from 4 to 7 showed pronounced uncoupling activity in isolated rat liver mitochondria at micromolar concentrations, with a tripentyl derivative being the most effective both in accelerating respiration and causing membrane potential collapse, as well as in provoking mitochondrial swelling in a potassium-acetate medium. Remarkably, the trialkyl phosphonium derivatives with n from 4 to 7 also proved to be rather potent antibacterial agents. Methylation of the chlorophenol hydroxyl group suppressed the effects of P555 and P444 on the respiration and membrane potential of mitochondria but not those of P666, thereby suggesting a mechanistic difference in the mitochondrial uncoupling by these derivatives, which was predominantly protonophoric (carrier-like) in the case of P555 and P444 but detergent-like with P666. The latter was confirmed by the carboxyfluorescein leakage assay on model liposomal membranes.
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Affiliation(s)
- Natalia
V. Terekhova
- Arbuzov
Institute of Organic and Physical Chemistry, FRC Kazan Scientific
Center of Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russian Federation
| | - Lyudmila S. Khailova
- Belozersky
Institute of Physico-Chemical Biology, Lomonosov
Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
| | - Tatyana I. Rokitskaya
- Belozersky
Institute of Physico-Chemical Biology, Lomonosov
Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
| | - Pavel A. Nazarov
- Belozersky
Institute of Physico-Chemical Biology, Lomonosov
Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
| | - Daut R. Islamov
- Arbuzov
Institute of Organic and Physical Chemistry, FRC Kazan Scientific
Center of Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russian Federation
| | - Konstantin S. Usachev
- Institute
of Fundamental Medicine and Biology, Kazan
Federal University, Kremlevskaya 18, Kazan 420008, Russian Federation
| | - Dmitry A. Tatarinov
- Arbuzov
Institute of Organic and Physical Chemistry, FRC Kazan Scientific
Center of Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russian Federation
| | - Vladimir F. Mironov
- Arbuzov
Institute of Organic and Physical Chemistry, FRC Kazan Scientific
Center of Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russian Federation
| | - Elena A. Kotova
- Belozersky
Institute of Physico-Chemical Biology, Lomonosov
Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
| | - Yuri N. Antonenko
- Belozersky
Institute of Physico-Chemical Biology, Lomonosov
Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
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