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Oliveira JD, Rodrigues da Silva GH, de Moura LD, Göethel G, Papini JZB, Casadei BR, Ribeiro LNDM, Cabeça LF, Garcia SC, Martinez EF, Tofoli GR, de Paula E. DoE development of ionic gradient liposomes: A successful approach to improve encapsulation, prolong anesthesia and decrease the toxicity of etidocaine. Int J Pharm 2023; 634:122672. [PMID: 36738810 DOI: 10.1016/j.ijpharm.2023.122672] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 01/19/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023]
Abstract
Etidocaine (EDC) is a long-acting local anesthetic of the aminoamide family whose use was discontinued in 2008 for alleged toxicity issues. Ionic gradient liposomes (IGL) are nanostructured carriers for which an inner/outer gradient of ions increases drug upload. This work describes IGLEDC, a formulation optimized by Design of Experiments, composed of hydrogenated soy phosphatidylcholine:cholesterol:EDC, and characterized by DLS, NTA, TEM/Cryo-TEM, DSC and 1H NMR. The optimized IGL showed significant encapsulation efficiency (41 %), good shelf stability (180 days) and evidence of EDC interaction with the lipid bilayer (as seen by DSC and 1H NMR results) that confirms its membrane permeation. In vitro (release kinetics and cytotoxicity) tests showed that the encapsulation of EDC into the IGL promoted sustained release for 24 h and decreased by 50 % the intrinsic toxicity of EDC to Schwann cells. In vivo IGLEDC decreased the toxicity of EDC to Caenorhabditis elegans by 25 % and extended its anesthetic effect by one hour, after infiltrative administration, at clinically used (0.5 %) concentration, in rats. Thus, this novel drug delivery system is a promise for the possible reintroduction of EDC in clinics, aiming at the control of operative and postoperative pain.
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Affiliation(s)
- Juliana Damasceno Oliveira
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, SP, Brazil
| | | | - Ludmila David de Moura
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, SP, Brazil
| | - Gabriela Göethel
- Toxicology Laboratory, Pharmacy Faculty, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Juliana Z B Papini
- São Leopoldo Mandic Institute and Research Center, Campinas-São Paulo, Brazil
| | | | | | - Luis Fernando Cabeça
- Department of Chemistry, Federal Technological University of Parana, Londrina, PR, Brazil
| | - Solange Cristina Garcia
- Toxicology Laboratory, Pharmacy Faculty, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | | | - Eneida de Paula
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, SP, Brazil.
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Freitas de Lima F, da Silva BB, Oliveira JD, de Moura LD, Rodrigues da Silva GH, Fernandes PCL, Souza RIC, Dos Santos AC, de Paula E. Prolonged anesthesia and decreased toxicity of enantiomeric-excess bupivacaine loaded in ionic gradient liposomes. Int J Pharm 2021; 606:120944. [PMID: 34324985 DOI: 10.1016/j.ijpharm.2021.120944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/26/2022]
Abstract
Bupivacaine is the most employed local anesthetic in surgical procedures, worldwide. Its systemic toxicity has directed the synthesis of the less toxic, S(-) enantiomer. This work describes a formulation of ionic gradient liposomes (IGL) containing S75BVC, an enantiomeric excess mixture of 75% S(-) and 25% R(+) bupivacaine. IGL prepared with 250 mM (NH4)2SO4 in the inner aqueous core of phosphatidylcholine and cholesterol (3:2 mol%) vesicles plus 0.5% S75BVC showed average sizes of 312.5 ± 4.5 nm, low polydispersity (PDI < 0.18), negative zeta potentials (-14.2 ± 0.2 mV) and were stable for 360 days. The encapsulation efficiency achieved with IGLS75BVC (%EE = 38.6%) was higher than with IGL prepared with racemic bupivacaine (IGLRBVC, %EE = 28.3%). TEM images revealed spherical vesicles and µDSC analysis provided evidence on the interaction of the anesthetic with the lipid bilayer. Then, in vitro - release kinetics and cytotoxicity- and in vivo - toxic effects in Zebrafish and biochemical/histopathological analysis plus analgesia in Wistar rats - tests were performed. IGLS75BVC exhibited negligible toxicity against Schwann cells and Zebrafish larvae, and it did not affect biochemical markers or the morphology of rat tissues (heart, brain, cerebellum, sciatic nerve). The in vitro release of S75BVC from IGL was extended from 4 to 24 h, justifying the prolonged anesthetic effect measured in rats (~9 h). The advantages of IGLS75BVC formulation over IGLRBVC and plain bupivacaine formulations (prolonged anesthesia, preferential sensorial blockade, and no toxicity) confirm its potential for clinical use in surgical anesthesia.
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Affiliation(s)
- Fernando Freitas de Lima
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil
| | - Bianca Brandão da Silva
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil
| | - Juliana Damasceno Oliveira
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil
| | - Ludmilla David de Moura
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil
| | | | | | | | | | - Eneida de Paula
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil.
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Miguel V, Sánchez-Borzone ME, Mariani ME, García DA. Modulation of membrane physical properties by natural insecticidal ketones. Biophys Chem 2021; 269:106526. [PMID: 33348175 DOI: 10.1016/j.bpc.2020.106526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 11/16/2022]
Abstract
The insecticidal activity of Mentha oil and its main components has been tested and established for various insects/pests. Several mint ketones have demonstrated to act on GABAA receptors (GABAA-R), a transmembrane channel target of several important insecticides whose activity can be modulated by surface-active compounds and by changes in the physical properties of the lipid membrane. In the present work, we analyze the capacity of monoterpenic ketones most commonly found in Mentha species, pulegone and menthone, to interact with DPPC membranes by molecular dynamics (MD) simulations and Langmuir monolayers. The experimental results indicate that the presence of menthone and pulegone in the subphase modify the interfacial characteristics of DPPC isotherms. The changes were reflected as expansion of the isotherms and disappearance or bringing forward of DPPC phase transition. MD simulation corroborate these results and indicate that both ketones are located at the region of the carbonyl group, at the interface with the acyl chains. Ketone intercalation between lipid molecules would induce an increasing intermolecular interaction, diminishing the film elasticity and causing an ordering effect. Our results suggest that the insecticidal activity of both ketones could involve their interaction with lipid molecules causing disturbance of the cell membrane as postulated for several larvicide compounds, or at least modulating the receptor surrounding.
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Affiliation(s)
- V Miguel
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET, Córdoba, Argentina
| | - M E Sánchez-Borzone
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET, Córdoba, Argentina
| | - M E Mariani
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET, Córdoba, Argentina
| | - D A García
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET, Córdoba, Argentina.
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Prates ÉT, Rodrigues da Silva GH, Souza TF, Skaf MS, Pickholz M, de Paula E. Articaine interaction with phospholipid bilayers. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Zenak S, Sabeur S, López-Cascales J. Study of the insertion of a small symmetric star polymer into different phospholipid bilayers. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mechanism of local anesthetic-induced disruption of raft-like ordered membrane domains. Biochim Biophys Acta Gen Subj 2019; 1863:1381-1389. [PMID: 31207252 DOI: 10.1016/j.bbagen.2019.06.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/28/2019] [Accepted: 06/13/2019] [Indexed: 11/20/2022]
Abstract
BACKGROUND Because ordered membrane domains, called lipid rafts, regulate activation of ion channels related to the nerve pulse, lipids rafts are thought to be a possible target for anesthetic molecules. To understand the mechanism of anesthetic action, we examined influence of representative local anesthetics (LAs); dibucaine, tetracaine, and lidocaine, on raft-like liquid-ordered (Lo)/non-raft-like liquid-disordered (Ld) phase separation. METHODS Impact of LAs on the phase separation was observed by fluorescent microscopy. LA-induced perturbation of the Lo and Ld membranes was examined by DPH anisotropy measurements. Incorporation of LAs to the membranes was examined by fluorescent anisotropy of LAs. The biding location of the LAs was indicated by small angle x-ray diffraction (SAXD). RESULTS Fluorescent experiments showed that dibucaine eliminated the phase separation the most effectively, followed by tetracaine and lidocaine. The disruption of the phase separation can be explained by their disordering effects on the Lo membrane. SAXD and other experiments further suggested that dibucaine's most potent perturbation of the Lo membrane is attributable to its deeper immersion and bulky molecular structure. Tetracaine, albeit immersed in the Lo membrane as deeply as dibucaine, less perturbs the Lo membrane probably because of its smaller bulkiness. Lidocaine hardly reaches the hydrophobic region, resulting in the weakest Lo membrane perturbation. CONCLUSION Dibcaine perturbs the Lo membrane the most effectively, followed by tetracaine and lidocaine. This ranking correlates with their anesthetic potency. GENERAL SIGNIFICANCE This study suggests a possible mechanistic link between anesthetic action and perturbation of lipid rafts.
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Liu GL, Bian WC, Zhao P, Sun LH. Delivery of Local Anesthesia: Current Strategies, Safety, and Future Prospects. Curr Drug Metab 2019; 20:533-539. [PMID: 31187706 DOI: 10.2174/1389200220666190610155049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/19/2019] [Accepted: 04/24/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND The systemic administration of anesthesia is associated with severe and undesirable side effects such as sedation, vomiting, nausea, allergies, respiratory problems, and neutrophil dysfunction. With the increase in the procedures of limb surgery, cosmetics, facial, skin, and cancer reconstruction, the demand for local anesthesia has increased multifold during the last one decade. Therefore, novel, safe, and cost-effective methods are being developed to deliver local anesthetics by the surgeons. METHOD To prepare a comprehensive research report on anesthesia, we performed a structured literature search of bibliographic databases for peer-reviewed articles published recently. The studies of different articles were summarized and a deductive qualitative and quantitative data analysis was applied. Subsequently, a comprehensive summary of the analysis was used to frame this review article with ample examples. RESULTS A thorough analysis of the reports suggested that there have been tremendous developments of synthesizing nanoparticle-based local anesthesia drugs. The active targeting ability of nanoparticle-based drug delivery strategy can further help to deliver the desired anesthetic drug locally. It was also found that different local anesthetic drugs are developed into liposome form and show better efficacy in patients receiving anesthesia. CONCLUSION The findings of this review article endorse that safe delivery of anesthesia drugs are essential for the safety of patients. Further, nanotechnology-based strategies are extremely useful for targeted delivery of anesthetic drugs at the required dose without affecting the neighboring tissues.
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Affiliation(s)
- Guo-Liang Liu
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Wen-Chao Bian
- Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun 130041, China
| | - Peng Zhao
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Li-Hua Sun
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun 130041, China
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Oliveira JD, Ribeiro LNDM, Rodrigues da Silva GH, Casadei BR, Couto VM, Martinez EF, de Paula E. Sustained Release from Ionic-Gradient Liposomes Significantly Decreases ETIDOCAINE Cytotoxicity. Pharm Res 2018; 35:229. [DOI: 10.1007/s11095-018-2512-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/27/2018] [Indexed: 12/18/2022]
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Thermal Stability of Phase-Separated Domains in Multicomponent Lipid Membranes with Local Anesthetics. MEMBRANES 2017; 7:membranes7030033. [PMID: 28661445 PMCID: PMC5618118 DOI: 10.3390/membranes7030033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/23/2017] [Accepted: 06/23/2017] [Indexed: 11/25/2022]
Abstract
The functional mechanisms of local anesthetics (LAs) have not yet been fully explained, despite their importance in modern medicine. Recently, an indirect interaction between channel proteins and LAs was proposed as follows: LAs alter the physical properties of lipid membranes, thus affecting the channel proteins. To examine this hypothesis, we investigated changes in thermal stability in lipid membranes consisting of dioleoylphosphocholine, dipalmitoylphosphocholine, and cholesterol by adding the LAs, lidocaine and tetracaine. The miscibility temperature of liquid-ordered (Lo) and liquid-disordered (Ld) phase separation was lowered, whereas that of phase separation between solid-ordered (So) and Ld phases was unchanged by LAs. Furthermore, we measured the line tension at the Lo/Ld interface from domain boundary fluctuation and found that it was significantly decreased by LAs. Finally, differential scanning calorimetry (DSC) revealed a change in the lipid main transition temperature on the addition of LAs. Based on the DSC measurements, we considered that LAs are partitioned into two coexisting phases.
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Comparison of histopathological effects of perineural administration of bupivacaine and bupivacaine-dexmedetomidine in rat sciatic nerve. ACTA ACUST UNITED AC 2016; 68:559-564. [DOI: 10.1016/j.etp.2016.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/05/2016] [Accepted: 09/07/2016] [Indexed: 11/19/2022]
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Koklic T. Perifosine induced release of contents of trans cell-barrier transport efficient liposomes. Chem Phys Lipids 2014; 183:50-9. [DOI: 10.1016/j.chemphyslip.2014.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 05/13/2014] [Accepted: 05/15/2014] [Indexed: 01/10/2023]
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Abd El-Alim S, Kassem A, Basha M. Proniosomes as a novel drug carrier system for buccal delivery of benzocaine. J Drug Deliv Sci Technol 2014. [DOI: 10.1016/s1773-2247(14)50087-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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ESR spectroscopic characterization of spin labeled procaine in homogeneous solutions and membrane mimetic systems. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Caruso B, Sánchez JM, García DA, de Paula E, Perillo MA. Probing the combined effect of flunitrazepam and lidocaine on the stability and organization of bilayer lipid membranes. A differential scanning calorimetry and dynamic light scattering study. Cell Biochem Biophys 2012; 66:461-75. [PMID: 23269502 DOI: 10.1007/s12013-012-9494-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Combined effects of flunitrazepam (FNZ) and lidocaine (LDC) were studied on the thermotropic equilibrium of dipalmitoyl phosphatidylcholine (dpPC) bilayers. This adds a thermodynamic dimension to previously reported geometric analysis in the erythrocyte model. LDC decreased the enthalpy and temperature for dpPC pre- and main-transitions (ΔHp, ΔHm, Tp, Tm) and decreased the cooperativity of the main-transition (ΔT(1/2,m)). FNZ decreased ΔHm and, at least up to 59 μM, also decreased ΔHp. In conjunction with LDC, FNZ induced a recovery of ∆T(1/2,m) control values and increased ΔHm even above the control level. The deconvolution of the main-transition peak at high LDC concentrations revealed three components possibly represented by: a self-segregated fraction of pure dpPC, a dpPC-LDC mixture and a phase with a lipid structure of intermediate stability associated with LDC self-aggregation within the lipid phase. Some LDC effects on thermodynamic parameters were reverted at proper LDC/FNZ molar ratios, suggesting that FNZ restricts the maximal availability of the LDC partitioned into the lipid phase. Thus, beyond its complexity, the lipid-LDC mixture can be rationalized as an equilibrium of coexisting phases which gains homogeneity in the presence of FNZ. This work stresses the relevance of nonspecific drug-membrane binding on LDC-FNZ pharmacological interactions and would have pharmaceutical applications in liposomal multidrug-delivery.
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Affiliation(s)
- Benjamín Caruso
- Departamento de Química, FCEFyN, Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina.
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Tappenbeck K, Hoppe S, Hopster K, Kietzmann M, Feige K, Huber K. Lidocaine and structure-related mexiletine induce similar contractility-enhancing effects in ischaemia-reperfusion injured equine intestinal smooth muscle in vitro. Vet J 2012; 196:461-6. [PMID: 23265867 DOI: 10.1016/j.tvjl.2012.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 11/05/2012] [Accepted: 11/15/2012] [Indexed: 10/27/2022]
Abstract
Postoperative ileus (POI) is a severe complication following small intestinal surgery in horses. It was hypothesised that prokinetic effects of lidocaine, the most commonly chosen drug for treatment of POI, resulted from drug integration into smooth muscle (SM) cell membranes, thereby modulating cell membrane properties. This would probably depend on the structural and lipophilic characteristics of lidocaine. To assess the influence of molecular structure and lipophilicity on prokinetic effects in vitro, the current study compared the effects of lidocaine with four structure-related drugs, namely, mexiletine, bupivacaine, tetracaine and procaine. The response to cumulative drug administration and reversibility of effects were tested by measuring isometric contractile performance of equine jejunal circular SM strips, challenged by a standardised, artificial in vivo ischaemia-reperfusion injury. A second set of SM strips were incubated with the different drugs to determine changes in creatine kinase (CK) release. All drugs caused a drug-specific increase in contractility, although only lidocaine and mexiletine induced similar concentration-dependent curve progressions, significantly reduced CK release, and featured shorter recovery times of tissue contractility after washing, compared to bupivacaine and tetracaine. In was concluded that the structural and lipophilic similarity of mexiletine and lidocaine were responsible for the similar effects of these drugs on SM contractility and cell membrane permeability, which supported the hypothesis that prokinetic effects of lidocaine are based on interactions with SM cell membranes modulated by these features.
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Affiliation(s)
- Karen Tappenbeck
- Department of Physiology, University of Veterinary Medicine, Bischofsholer Damm 15, D-30173 Hannover, Germany
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Weizenmann N, Huster D, Scheidt HA. Interaction of local anesthetics with lipid bilayers investigated by 1H MAS NMR spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:3010-8. [DOI: 10.1016/j.bbamem.2012.07.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/16/2012] [Accepted: 07/19/2012] [Indexed: 11/25/2022]
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Local Neurotoxicity and Myotoxicity Evaluation of Cyclodextrin Complexes of Bupivacaine and Ropivacaine. Anesth Analg 2012; 115:1234-41. [DOI: 10.1213/ane.0b013e318266f3d9] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Shintani M, Matsuo Y, Sakuraba S, Matubayasi N. Interaction of naphthalene derivatives with lipids in membranes studied by the 1H-nuclear Overhauser effect and molecular dynamics simulation. Phys Chem Chem Phys 2012; 14:14049-60. [DOI: 10.1039/c2cp41984j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Yi Z, Nagao M, Bossev DP. Effect of charged lidocaine on static and dynamic properties of model bio-membranes. Biophys Chem 2012; 160:20-7. [DOI: 10.1016/j.bpc.2011.08.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 08/28/2011] [Accepted: 08/30/2011] [Indexed: 11/28/2022]
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Cascales JJL, Costa SDO, Porasso RD. Thermodynamic study of benzocaine insertion into different lipid bilayers. J Chem Phys 2011; 135:135103. [DOI: 10.1063/1.3643496] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Poly(Lactide-co-Glycolide) Nanocapsules Containing Benzocaine: Influence of the Composition of the Oily Nucleus on Physico-Chemical Properties and Anesthetic Activity. Pharm Res 2011; 28:1984-94. [DOI: 10.1007/s11095-011-0425-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 03/08/2011] [Indexed: 11/25/2022]
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Rhee YS, Park CW, Oh TO, Kim JY, Ha JM, Lee BJ, Lee KH, Chi SC, Park ES. Effect of electrokinetic stabilizers on the physicochemical properties of propofol emulsions. Int J Pharm 2010; 398:21-7. [DOI: 10.1016/j.ijpharm.2010.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 06/21/2010] [Accepted: 07/08/2010] [Indexed: 10/19/2022]
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Abstract
IMPORTANCE OF THE FIELD Systemic toxicity, usually from overdose or intravascular dose, is feared because it mainly affects the heart and brain, and may be acutely life-threatening. AREAS COVERED IN THIS REVIEW Pharmacological studies of local anesthetic toxicity have largely been reviewed primarily relating to the evaluation of ropivacaine and levobupivacaine during the past decade. This review/opinion focuses more on the principles and concepts underlying the main models used, from chemical pharmacological and pharmacokinetic perspectives. WHAT THE READER WILL GAIN Research models required to produce pivotal toxicity data are discussed. The potencies for neural blockade and systemic toxicity are associated across virtually all models, with some deviations through molecular stereochemistry. These models show that all local anesthetics can produce direct cardiovascular system toxicity and CNS excitotoxicity that may further affect the cardiovascular system response. Whereas the longer-acting local anesthetics are more likely to cause cardiac death by malignant arrhythmias, the shorter-acting agents are more likely to cause cardiac contraction failure. In most models, equi-anesthetic doses of ropivacaine and levobupivacaine are less likely to produce serious toxicity than bupivacaine. TAKE HOME MESSAGE Of the various models, this reviewer favors a whole-body large animal preparation because of the comprehensive data collection possible. The conscious sheep preparation has contributed more than any other, and may be regarded as the de facto 'standard' experimental model for concurrent study of local anesthetic toxicity ± pharmacokinetics, using experimental designs that can reproduce the toxicity seen in clinical accidents.
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Affiliation(s)
- Laurence E Mather
- The University of Sydney, Royal North Shore Hospital, Department of Anaesthesia & Pain Management, St Leonards, Sydney 2065, Australia.
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Pickholz M, Giupponi G. Coarse grained simulations of local anesthetics encapsulated into a liposome. J Phys Chem B 2010; 114:7009-15. [PMID: 20429599 DOI: 10.1021/jp909148n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated the encapsulation of prilocaine (PLC), an aminoamide local anesthetic widely used in dentistry, into a small unilamellar liposome. We extended a recently developed coarse grained model to access the problem relevant time and length scales. Molecular dynamics (MD) simulations for different protonation states of the PLC captured important features of the PLC-vesicle interactions. We found that all neutral PLC molecules (nPLC) rapidly diffuse into the hydrophobic region of the vesicle adopting an asymmetric bimodal density distribution, with nPLC molecules jumping between the internal and external vesicle monolayers. Protonated PLC molecules (pPLC) initially placed in water were instead only found on the external monolayer, with a high rate of exchange with the water phase and no access to the inner part of the liposome. Although electrostatic interaction between pPLC tails and oppositely charged lipid head groups is shown to be structured, hydrophobicity is the driving force of PLC drug absorption within the liposome. Our simulations also show that a major percentage of pPLC remains trapped within the interior water phase of the liposome when starting from a configuration with pPLC distributed within the lipid membrane. This suggests that at low pH liposome-PLC complexes and therefore drug efficacy can strongly depend on the preparation procedure.
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Affiliation(s)
- Mónica Pickholz
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junin 954 RA-1053, Argentina
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Porasso RD, Drew Bennett WF, Oliveira-Costa SD, López Cascales JJ. Study of the Benzocaine Transfer from Aqueous Solution to the Interior of a Biological Membrane. J Phys Chem B 2009; 113:9988-94. [DOI: 10.1021/jp902931s] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rodolfo D. Porasso
- Instituto de Matemática Aplicada San Luis (IMASL) - Departamento de Física, Universidad Nacional de San Luis/CONICET, D5700HHW, San Luis, Argentina, Department of Biological Sciences, University of Calgary, Calgary AB T3A 2H4, Canada, and Universidad Politécnica de Cartagena, Grupo de Bioinformática y Macromoléculas (BioMac) Aulario II, Campus de Alfonso XIII, 30203 Cartagena, Murcia, Spain
| | - W. F. Drew Bennett
- Instituto de Matemática Aplicada San Luis (IMASL) - Departamento de Física, Universidad Nacional de San Luis/CONICET, D5700HHW, San Luis, Argentina, Department of Biological Sciences, University of Calgary, Calgary AB T3A 2H4, Canada, and Universidad Politécnica de Cartagena, Grupo de Bioinformática y Macromoléculas (BioMac) Aulario II, Campus de Alfonso XIII, 30203 Cartagena, Murcia, Spain
| | - S. D. Oliveira-Costa
- Instituto de Matemática Aplicada San Luis (IMASL) - Departamento de Física, Universidad Nacional de San Luis/CONICET, D5700HHW, San Luis, Argentina, Department of Biological Sciences, University of Calgary, Calgary AB T3A 2H4, Canada, and Universidad Politécnica de Cartagena, Grupo de Bioinformática y Macromoléculas (BioMac) Aulario II, Campus de Alfonso XIII, 30203 Cartagena, Murcia, Spain
| | - J. J. López Cascales
- Instituto de Matemática Aplicada San Luis (IMASL) - Departamento de Física, Universidad Nacional de San Luis/CONICET, D5700HHW, San Luis, Argentina, Department of Biological Sciences, University of Calgary, Calgary AB T3A 2H4, Canada, and Universidad Politécnica de Cartagena, Grupo de Bioinformática y Macromoléculas (BioMac) Aulario II, Campus de Alfonso XIII, 30203 Cartagena, Murcia, Spain
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Cabeça LF, Pickholz M, de Paula E, Marsaioli AJ. Liposome−Prilocaine Interaction Mapping Evaluated through STD NMR and Molecular Dynamics Simulations. J Phys Chem B 2009; 113:2365-70. [DOI: 10.1021/jp8069496] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luís F. Cabeça
- Institute of Chemistry, UNICAMP, CP 6154, 13083-970 Campinas, SP, Brazil, and Institute of Biology, UNICAMP, CP 6109, 13083-970 Campinas, SP, Brazil
| | - Mónica Pickholz
- Institute of Chemistry, UNICAMP, CP 6154, 13083-970 Campinas, SP, Brazil, and Institute of Biology, UNICAMP, CP 6109, 13083-970 Campinas, SP, Brazil
| | - Eneida de Paula
- Institute of Chemistry, UNICAMP, CP 6154, 13083-970 Campinas, SP, Brazil, and Institute of Biology, UNICAMP, CP 6109, 13083-970 Campinas, SP, Brazil
| | - Anita J. Marsaioli
- Institute of Chemistry, UNICAMP, CP 6154, 13083-970 Campinas, SP, Brazil, and Institute of Biology, UNICAMP, CP 6109, 13083-970 Campinas, SP, Brazil
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27
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Dibucaine effects on structural and elastic properties of lipid bilayers. Biophys Chem 2008; 139:75-83. [PMID: 19010585 DOI: 10.1016/j.bpc.2008.10.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 10/17/2008] [Accepted: 10/20/2008] [Indexed: 11/20/2022]
Abstract
In this work we report the interaction effects of the local anesthetic dibucaine (DBC) with lipid patches in model membranes by Atomic Force Microscopy (AFM). Supported lipid bilayers (egg phosphatidylcholine, EPC and dimyristoylphosphatidylcholine, DMPC) were prepared by fusion of unilamellar vesicles on mica and imaged in aqueous media. The AFM images show irregularly distributed and sized EPC patches on mica. On the other hand DMPC formation presents extensive bilayer regions on top of which multibilayer patches are formed. In the presence of DBC we observed a progressive disruption of these patches, but for DMPC bilayers this process occurred more slowly than for EPC. In both cases, phase images show the formation of small structures on the bilayer surface suggesting an effect on the elastic properties of the bilayers when DBC is present. Dynamic surface tension and dilatational surface elasticity measurements of EPC and DMPC monolayers in the presence of DBC by the pendant drop technique were also performed, in order to elucidate these results. The curve of lipid monolayer elasticity versus DBC concentration, for both EPC and DMPC cases, shows a maximum for the surface elasticity modulus at the same concentration where we observed the disruption of the bilayer by AFM. Our results suggest that changes in the local curvature of the bilayer induced by DBC could explain the anesthetic action in membranes.
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Castro V, Stevensson B, Dvinskikh SV, Högberg CJ, Lyubartsev AP, Zimmermann H, Sandström D, Maliniak A. NMR investigations of interactions between anesthetics and lipid bilayers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2604-11. [PMID: 18722341 DOI: 10.1016/j.bbamem.2008.07.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 07/11/2008] [Accepted: 07/14/2008] [Indexed: 11/24/2022]
Abstract
Interactions between anesthetics (lidocaine and short chain alcohols) and lipid membranes formed by dimyristoylphosphatidylcholine (DMPC) were studied using NMR spectroscopy. The orientational order of lidocaine was investigated using deuterium NMR on a selectively labelled compound whereas segmental ordering in the lipids was probed by two-dimensional 1H-13C separated local field experiments under magic-angle spinning conditions. In addition, trajectories generated in molecular dynamics (MD) computer simulations were used for interpretation of the experimental results. Separate simulations were carried out with charged and uncharged lidocaine molecules. Reasonable agreement between experimental dipolar interactions and the calculated counterparts was observed. Our results clearly show that charged lidocaine affects significantly the lipid headgroup. In particular the ordering of the lipids is increased accompanied by drastic changes in the orientation of the P-N vector in the choline group.
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Affiliation(s)
- Vasco Castro
- Division of Physical Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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