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Poirier B, Pasquier O, Chenede X, Corbier A, Prigent P, Azam A, Bernard C, Guillotel M, Gillot F, Riva L, Briand V, Ingenito R, Gauzy-Lazo L, Duclos O, Philippo C, Maillere B, Bianchi E, Mallart S, Janiak P, Illiano S. R2R01: A long-acting single-chain peptide agonist of RXFP1 for renal and cardiovascular diseases. Br J Pharmacol 2024. [PMID: 38450758 DOI: 10.1111/bph.16338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/09/2023] [Revised: 01/08/2024] [Accepted: 01/11/2024] [Indexed: 03/08/2024] Open
Abstract
BACKGROUND The therapeutic potential of relaxin for heart failure and renal disease in clinical trials is hampered by the short half-life of serelaxin. Optimization of fatty acid-acetylated single-chain peptide analogues of relaxin culminated in the design and synthesis of R2R01, a potent and selective RXFP1 agonist with subcutaneous bioavailability and extended half-life. EXPERIMENTAL APPROACH Cellular assays and pharmacological models of RXFP1 activation were used to validate the potency and selectivity of R2R01. Increased renal blood flow was used as a translational marker of R2R01 activity. Human mastocytes (LAD2 cells) were used to study potential pseudo-allergic reactions and CD4+ T-cells to study immunogenicity. The pharmacokinetics of R2R01 were characterized in rats and minipigs. KEY RESULTS In vitro, R2R01 had comparable potency and efficacy to relaxin as an agonist for human RXFP1. In vivo, subcutaneous administration of R2R01 increased heart rate and renal blood flow in normotensive and hypertensive rat and did not show evidence of tachyphylaxis. R2R01 also increased nipple length in rats, used as a chronic model of RXFP1 engagement. Pharmacokinetic studies showed that R2R01 has a significantly extended terminal half-life. The in vitro assays with LAD2 cells and CD4+ T-cells showed that R2R01 had low potential for pseudo-allergic and immunogenic reactions, respectively. CONCLUSION AND IMPLICATIONS R2R01 is a potent RXFP1 agonist with an extended half-life that increases renal blood flow in various settings including normotensive and hypertensive conditions. The preclinical efficacy and safety data supported clinical development of R2R01 as a potential new therapy for renal and cardiovascular diseases.
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Affiliation(s)
- Bruno Poirier
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | | | - Xavier Chenede
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Alain Corbier
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Philippe Prigent
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | | | - Carine Bernard
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Michel Guillotel
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Florence Gillot
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Laurence Riva
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Veronique Briand
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Raffaele Ingenito
- Peptides and Small Molecules R&D Department, IRBM Spa, Pomezia, Rome, Italy
| | - Laurence Gauzy-Lazo
- Département Médicaments et Technologies pour la Santé, Université de Paris-Saclay, CEA, INRAE, Gif-sur-Yvette, France
| | - Olivier Duclos
- Département Médicaments et Technologies pour la Santé, Université de Paris-Saclay, CEA, INRAE, Gif-sur-Yvette, France
| | | | | | - Elisabetta Bianchi
- Peptides and Small Molecules R&D Department, IRBM Spa, Pomezia, Rome, Italy
| | - Sergio Mallart
- Département Médicaments et Technologies pour la Santé, Université de Paris-Saclay, CEA, INRAE, Gif-sur-Yvette, France
| | - Philip Janiak
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
| | - Stephane Illiano
- Cardio-Vascular and metabolism, Sanofi R&D, Chilly Mazarin, France
- Investigative Toxicology, Sanofi R&D, Chilly Mazarin, France
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2
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Esposito S, Krick A, Pasquier O, Bonche F, Ingenito R, Magotti P, Bianchi E, Monteagudo E, Gallo M, Cicero DO, Orsatti L, Veneziano M, Caretti F, Mele R, Roversi D, Gennari N, Brasseur D, Gauzy-Lazo L, Duclos O, Mauriac C, Illiano S, Mallart S. Fatty acid acylated peptide therapeutics: discovery of omega-n oxidation of the lipid chain as a novel metabolic pathway in preclinical species. J Pharm Biomed Anal 2023; 227:115256. [PMID: 36764268 DOI: 10.1016/j.jpba.2023.115256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/19/2022] [Revised: 01/11/2023] [Accepted: 01/15/2023] [Indexed: 01/19/2023]
Abstract
We recently described C18 fatty acid acylated peptides as a new class of potent long-lasting single-chain RXFP1 agonists that displayed relaxin-like activities in vivo. Early pharmacokinetics and toxicological studies of these stearic acid acylated peptides revealed a relevant oxidative metabolism occurring in dog and minipig, and also seen at a lower extent in monkey and rat. Mass spectrometry combined to NMR spectroscopy studies revealed that the oxidation occurred, unexpectedly, on the stearic acid chain at ω-1, ω-2 and ω-3 positions. Structure-metabolism relationship studies on acylated analogues with different fatty acids lengths (C15-C20) showed that the extent of oxidation was higher with longer chains. The oxidized metabolites could be generated in vitro using liver microsomes and engineered bacterial CYPs. These systems were correlating poorly with in vivo metabolism observed across species; however, the results suggest that this biotransformation pathway might be catalyzed by some unknown CYP enzymes.
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Affiliation(s)
- Simone Esposito
- Biodistribution, Biotransformation and Analytical Science Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy.
| | - Alain Krick
- DMPK France, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France.
| | - Olivier Pasquier
- DMPK France, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Fabrice Bonche
- DMPK France, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Raffaele Ingenito
- Peptide Chemistry Unit, Peptides & Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Paola Magotti
- Peptide Chemistry Unit, Peptides & Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Elisabetta Bianchi
- Peptide Chemistry Unit, Peptides & Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Edith Monteagudo
- Biodistribution, Biotransformation and Analytical Science Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy; PK/PD & Bioanalytics Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Mariana Gallo
- Structural Biology Unit, Computational Chemistry & Structural Biology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Daniel Oscar Cicero
- Department of Chemical Science and Technology, University of Rome "Tor Vergata", 00133 Rome, Italy
| | - Laura Orsatti
- PK/PD & Bioanalytics Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Maria Veneziano
- PK/PD & Bioanalytics Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Fulvia Caretti
- PK/PD & Bioanalytics Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Riccardo Mele
- Biodistribution, Biotransformation and Analytical Science Unit, Experimental Pharmacology Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Daniela Roversi
- Peptide Chemistry Unit, Peptides & Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Nadia Gennari
- High Throughput Biology & Screening, Translational Research Department, IRBM Spa, Via Pontina Km 30 600, 00 071 Pomezia, Rome, Italy
| | - Denis Brasseur
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Laurence Gauzy-Lazo
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Olivier Duclos
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Christine Mauriac
- DMPK France, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Stephane Illiano
- Investigative Toxicology, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France
| | - Sergio Mallart
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, 91385 Chilly Mazarin, France.
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Mallart S, Ingenito R, Bianchi E, Bresciani A, Esposito S, Gallo M, Magotti P, Monteagudo E, Orsatti L, Roversi D, Santoprete A, Tucci F, Veneziano M, Bartsch R, Boehm C, Brasseur D, Bruneau P, Corbier A, Froissant J, Gauzy-Lazo L, Gervat V, Marguet F, Menguy I, Minoletti C, Nicolas MF, Pasquier O, Poirier B, Raux A, Riva L, Janiak P, Strobel H, Duclos O, Illiano S. Identification of Potent and Long-Acting Single-Chain Peptide Mimetics of Human Relaxin-2 for Cardiovascular Diseases. J Med Chem 2021; 64:2139-2150. [PMID: 33555858 DOI: 10.1021/acs.jmedchem.0c01533] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 11/29/2022]
Abstract
The insulin-like peptide human relaxin-2 was identified as a hormone that, among other biological functions, mediates the hemodynamic changes occurring during pregnancy. Recombinant relaxin-2 (serelaxin) has shown beneficial effects in acute heart failure, but its full therapeutic potential has been hampered by its short half-life and the need for intravenous administration limiting its use to intensive care units. In this study, we report the development of long-acting potent single-chain relaxin peptide mimetics. Modifications in the B-chain of relaxin, such as the introduction of specific mutations and the trimming of the sequence to an optimal size, resulted in potent, structurally simplified peptide agonists of the relaxin receptor Relaxin Family Peptide Receptor 1 (RXFP1) (e.g., 54). Introduction of suitable spacers and fatty acids led to the identification of single-chain lipidated peptide agonists of RXFP1, with sub-nanomolar activity, high subcutaneous bioavailability, extended half-lives, and in vivo efficacy (e.g., 64).
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Affiliation(s)
- Sergio Mallart
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Raffaele Ingenito
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Elisabetta Bianchi
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Alberto Bresciani
- Department of Translational Biology, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Simone Esposito
- DMPK, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Mariana Gallo
- Structural Biology, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Paola Magotti
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Edith Monteagudo
- DMPK, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Laura Orsatti
- DMPK, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Daniela Roversi
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Alessia Santoprete
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Federica Tucci
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Maria Veneziano
- DMPK, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Régine Bartsch
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Claudius Boehm
- Industrial Affairs, iCMC, Sanofi-Aventis R&D, Industriepark Höchst, Frankfurt 65926, Germany
| | - Denis Brasseur
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Patricia Bruneau
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Alain Corbier
- Cardio-Vascular and metabolism, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Jacques Froissant
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Laurence Gauzy-Lazo
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Vincent Gervat
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Frank Marguet
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Isabelle Menguy
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Claire Minoletti
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Marie-Françoise Nicolas
- Preclinical Development Sciences, Sanofi R&D, 13 quai Jules Guesde, Vitry sur Seine 94400, France
| | - Olivier Pasquier
- DMPK France, Sanofi R&D, 3 digue d'Alfortville, Alfortville 94140, France
| | - Bruno Poirier
- Cardio-Vascular and metabolism, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Alexandre Raux
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Laurence Riva
- Cardio-Vascular and metabolism, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Philip Janiak
- Cardio-Vascular and metabolism, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Hartmut Strobel
- Peptides and Small Molecules R&D Department, IRBM Spa, Via Pontina Km 30 600, Pomezia, Rome 00 071, Italy
| | - Olivier Duclos
- Integrated Drug Discovery, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
| | - Stephane Illiano
- Cardio-Vascular and metabolism, Sanofi R&D, 1 rue Pierre Brossolette, Chilly Mazarin 91385, France
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4
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Mackness BC, Jaworski JA, Boudanova E, Park A, Valente D, Mauriac C, Pasquier O, Schmidt T, Kabiri M, Kandira A, Radošević K, Qiu H. Antibody Fc engineering for enhanced neonatal Fc receptor binding and prolonged circulation half-life. MAbs 2019; 11:1276-1288. [PMID: 31216930 PMCID: PMC6748615 DOI: 10.1080/19420862.2019.1633883] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [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] [Indexed: 01/24/2023] Open
Abstract
The neonatal Fc receptor (FcRn) promotes antibody recycling through rescue from normal lysosomal degradation. The binding interaction is pH-dependent with high affinity at low pH, but not under physiological pH conditions. Here, we combined rational design and saturation mutagenesis to generate novel antibody variants with prolonged half-life and acceptable development profiles. First, a panel of saturation point mutations was created at 11 key FcRn-interacting sites on the Fc region of an antibody. Multiple variants with slower FcRn dissociation kinetics than the wildtype (WT) antibody at pH 6.0 were successfully identified. The mutations were further combined and characterized for pH-dependent FcRn binding properties, thermal stability and the FcγRIIIa and rheumatoid factor binding. The most promising variants, YD (M252Y/T256D), DQ (T256D/T307Q) and DW (T256D/T307W), exhibited significantly improved binding to FcRn at pH 6.0 and retained similar binding properties as WT at pH 7.4. The pharmacokinetics in human FcRn transgenic mice and cynomolgus monkeys demonstrated that these properties translated to significantly prolonged plasma elimination half-life compared to the WT control. The novel variants exhibited thermal stability and binding to FcγRIIIa in the range comparable to clinically validated YTE and LS variants, and showed no enhanced binding to rheumatoid factor compared to the WT control. These engineered Fc mutants are promising new variants that are widely applicable to therapeutic antibodies, to extend their circulation half-life with obvious benefits of increased efficacy, and reduced dose and administration frequency.
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Affiliation(s)
| | | | | | - Anna Park
- Biologics Research, Sanofi , Framingham , MA , USA
| | | | | | | | | | | | | | | | - Huawei Qiu
- Biologics Research, Sanofi , Framingham , MA , USA
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5
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Jeudy J, Salvador A, Simon R, Jaffuel A, Fonbonne C, Léonard JF, Gautier JC, Pasquier O, Lemoine J. Overcoming biofluid protein complexity during targeted mass spectrometry detection and quantification of protein biomarkers by MRM cubed (MRM3). Anal Bioanal Chem 2013; 406:1193-200. [DOI: 10.1007/s00216-013-7266-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 07/02/2013] [Accepted: 07/17/2013] [Indexed: 01/19/2023]
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Salvador A, Gautier JY, Pasquier O, Merdjan H. Liquid chromatography-tandem mass spectrometric determination of a new antibacterial agent (AVE6971) in human white blood cells. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 855:173-9. [PMID: 17540623 DOI: 10.1016/j.jchromb.2007.04.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 11/30/2006] [Revised: 04/18/2007] [Accepted: 04/26/2007] [Indexed: 11/19/2022]
Abstract
An LC-MS/MS assay for the quantitative determination of a new antibacterial agent (AVE6971) has been developed and validated in human white blood cells (WBC). The assay involved a lysing procedure of white blood cells and ultra centrifugation of the extracts. Chromatography was performed on a Supelcosil ABZ+ C(18) (2.1 mm x 50 mm, 5 microm) column using a mobile phase consisting of methanol/acetonitrile/10mM ammonium formate mixture (10:30:60, v/v/v) at a flow rate of 0.2 ml/min. The linearity was within the range of 10-10000 ng/ml of extracts, corresponding to 0.5-500 ng of AVE6971 in WBC pellets tubes. The validated lower limit of quantification was 10 ng/ml. The inter- and intra-run coefficients of variation (CV) for the assay were <12.9% and the accuracy were from -9.0 to -1.2%. AVE6971 was stable in WBC for at least 1 month at -75 degrees C. This assay proved to be suitable for the determination of AVE6971 in WBC from clinical studies.
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Affiliation(s)
- Arnaud Salvador
- CEPHAC Europe, 90 Avenue des Hauts de la Chaume, BP 28, 86281 Saint-Benoît, France.
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7
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Ozou ML, Girault J, Malgouyat JM, Pasquier O. Determination of sodium cromoglycate in human plasma by liquid chromatography-mass spectrometry in the turbo ion spray mode. J Chromatogr B Biomed Sci Appl 2001; 765:179-85. [PMID: 11767311 DOI: 10.1016/s0378-4347(01)00420-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A highly sensitivity liquid chromatography-tandem mass spectrometry method has been developed for the quantitation of sodium cromoglycate (SCG) in human plasma. The method was validated over a linear range of 0.100-50.0 ng/ml, using 13C4 sodium cromoglycate as the internal standard. Compounds were extracted from 1.0 ml of lithium heparin plasma by methanol elution of C18 solid-phase extraction cartridges. The dried residue was reconstituted with 100 microl of 0.01 N HCl. and 30 microl was injected onto the LC-MS-MS system. Chromatographic separation was achieved on a C8 (3.5 microm) column with an isocratic mobile phase of methanol-water-0.5 M ammonium acetate (35:64.8:0.2, v/v/v). The analytes were detected with a PE Sciex API 3000 mass spectrometer using turbo ion spray with positive ionization. Ions monitored in the multiple reaction monitoring (MRM) mode were m/z 469.2 (precursor ion) to m/z 245.1 (product ion) for SCG and m/z 473.2 (precursor ion) to m/z 247.1 (product ion) for 13C4 SCG (I.S.). The average recoveries of SCG and the I.S. from human plasma were 91 and 87%, respectively. The low limit of quantitation was 0.100 ng/ml. Results from a 4-day validation study demonstrated excellent precision (C.V.% values were between 1.9 and 6.5%) and accuracy (-5.4 to - 1.2%) across the calibration range of 0.100-50.0 ng/ml.
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Affiliation(s)
- M L Ozou
- Department of Drug Metabolism and Pharmacokinetics (DMPK France), Aventis Pharma, Antony, France.
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Garey KW, Tesoro E, Muggia V, Pasquier O, Rodvold KA. Cerebrospinal fluid concentrations of quinupristin-dalfopristin in a patient with vancomycin-resistant Enterococcus faecium [correction of faecalis] ventriculitis. Pharmacotherapy 2001; 21:748-50. [PMID: 11401187 DOI: 10.1592/phco.21.7.748.34573] [Citation(s) in RCA: 17] [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: 11/23/2022]
Abstract
A 44-year-old man was treated successfully for vancomycin-resistant Enterococcus faecium (VREF) ventriculitis with intrathecal quinupristin-dalfopristin 1 mg, 2 mg, and 4 mg, and other intravenous antibiotics. Cerebrospinal fluid samples were collected before and after the 1-mg and 2-mg doses to determine the concentrations of quinupristin-dalfopristin and its active metabolites. Concentrations were above the minimum inhibitory concentration for VREF immediately after unclamping the extraventricular drain and were quantifiable for at least 7 hours.
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Affiliation(s)
- K W Garey
- University of Illinois at Chicago, 60612, USA
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9
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Chevalier P, Rey J, Pasquier O, Rouzier-Panis R, Harding N, Montay G. Multiple-dose pharmacokinetics and safety of two regimens of quinupristin/dalfopristin (Synercid) in healthy volunteers. J Clin Pharmacol 2001; 41:404-14. [PMID: 11304897 DOI: 10.1177/00912700122010267] [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: 11/16/2022]
Abstract
Quinupristin/dalfopristin (Q/D) is a novel streptogramin antibiotic for the treatment of severe gram-positive infections. The purpose of this open, nonrandomized, parallel-group, phase I trial was to evaluate Q/D pharmacokinetics after single and repeated doses under the two different dosing regimens corresponding to the effective doses and to evaluate tolerability. Two groups of 10 healthy volunteers received multiple 1-hour intravenous infusions of 7.5 mg/kg Q/D either every 8 or 12 hours for 4 or 5 days, respectively. Plasma concentrations of Q, D, and metabolites were determined using high-performance liquid chromatography and selective microbiological assays. The two regimens q8h and q12h lead to the same disposition profile after single and repeated administration. Single-dose data confirmed the high plasma clearances of Q and D (about 0.90 l/h/kg) obtained previously. Unchanged drugs were the main components in plasma, with each of the three metabolites representing about 20% (in terms of the AUC ratio) of the parent drugs. Comparable steady-state concentrations were reached from day 2 of both regimens. A similar moderate increase in Cmax and AUC (about 20%) of parent drugs was observed between the first and last day of treatment. This phenomenon, which was also observed for the metabolites, was not expected considering the short terminal disposition half-lives of the parent drugs and trough plasma concentrations of all components mostly below the limits of quantitation at steady state, whatever the dosing regimen. The clearances of parent drugs at steady state were about 20% lower as compared with that observed following the first drug administration (statistically significant difference). No trend suggesting a treatment effect on any laboratory parameter, vital signs, or electrocardiographic parameters was identified. However, 80% of subjects reported venous adverse events probably related to treatment.
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Affiliation(s)
- P Chevalier
- Aventis Pharmaceuticals, 13, quai Jules Guesde, 94403 Vitry-sur-Seine, France
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10
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Chevalier P, Rey J, Pasquier O, Leclerc V, Baguet JC, Meyrier A, Harding N, Montay G. Pharmacokinetics of quinupristin/ dalfopristin in patients with severe chronic renal insufficiency. Clin Pharmacokinet 2000; 39:77-84. [PMID: 10926351 DOI: 10.2165/00003088-200039010-00005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/02/2022]
Abstract
OBJECTIVE To compare the pharmacokinetic profile of a single intravenous injection of quinupristin/dalfopristin, a new injectable streptogramin, in healthy young individuals and patients with severe chronic renal insufficiency. A secondary objective was to assess the relative tolerability of this dose in these patients compared with healthy individuals. PATIENTS AND PARTICIPANTS 13 patients with severe chronic renal insufficiency (creatinine clearance 6 to 28 ml/min/1.73m2) were individually matched for gender, bodyweight and age to a healthy volunteer. METHODS Participants received a single dose of quinupristin/dalfopristin 7.5 mg/kg bodyweight as a continuous 1-hour intravenous infusion, followed by serial blood sampling. RESULTS The disposition profile of unchanged quinupristin was similar in the 2 groups. However, the elimination of quinupristin derivatives in patients with renal impairment tended to be decreased: mean peak plasma drug concentration (Cmax) and area under the concentration-time curve from zero to infinity (AUCinfinity) of quinupristin plus its active derivatives were about 1.4 times higher in the patients with renal impairment compared with healthy volunteers. The mean Cmax and AUCinfinity of both unchanged dalfopristin and dalfopristin plus its active derivatives were about 1.3 times higher in renally impaired patients than in healthy volunteers. Adverse events were generally mild and transient. No severe or serious adverse events were reported and no participants prematurely discontinued the study. Venous tolerability tended to be better in healthy volunteers than in the patients with renal impairment. CONCLUSION These results suggest that no formal reduction in the dosage of quinupristin/dalfopristin is necessary in patients with severe chronic renal impairment.
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Sevilla L, Aperlo C, Dulic V, Chambard JC, Boutonnet C, Pasquier O, Pognonec P, Boulukos KE. The Ets2 transcription factor inhibits apoptosis induced by colony-stimulating factor 1 deprivation of macrophages through a Bcl-xL-dependent mechanism. Mol Cell Biol 1999; 19:2624-34. [PMID: 10082528 PMCID: PMC84055 DOI: 10.1128/mcb.19.4.2624] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.4] [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: 11/20/2022] Open
Abstract
Bcl-xL, a member of the Bcl-2 family, inhibits apoptosis, and its expression is regulated at the transcriptional level, yet nothing is known about the transcription factors specifically activating this promoter. The bcl-x promoter contains potential Ets binding sites, and we show that the transcription factor, Ets2, first identified by its sequence identity to v-ets of the E26 retrovirus, can transactivate the bcl-x promoter. Transient expression of Ets2 results in the upregulation of Bcl-xL but not of Bcl-xS, an alternatively spliced gene product which induces apoptosis. Ets2 is ubiquitously expressed at low levels in a variety of cell types and tissues but is specifically induced to abundant levels during macrophage differentiation. Since Bcl-xL is also upregulated during macrophage differentiation, we asked whether the bcl-x could be a direct downstream target gene of Ets2 in macrophages. BAC1.2F5 macrophages, which are dependent on macrophage colony-stimulating factor 1 (CSF-1) for their growth and survival, were used in these studies. We show that CSF-1 stimulation of BAC1.2F5 macrophages results in the upregulation of expression of ets2 and bcl-xL with similar kinetics of induction. In the absence of CSF-1, these macrophages undergo cell death by apoptosis, whereas constitutive expression of Ets2 rescues these cells from cell death, and bcl-xL is upregulated. These results strongly suggest a novel role of Ets2 in affecting apoptosis through its regulation of Bcl-xL transcription.
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Affiliation(s)
- L Sevilla
- Centre de Biochimie, Université de Nice, Faculté des Sciences, 06108 Nice, France
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Johnson CA, Taylor CA, Zimmerman SW, Bridson WE, Chevalier P, Pasquier O, Baybutt RI. Pharmacokinetics of quinupristin-dalfopristin in continuous ambulatory peritoneal dialysis patients. Antimicrob Agents Chemother 1999; 43:152-6. [PMID: 9869581 PMCID: PMC89036 DOI: 10.1128/aac.43.1.152] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Quinupristin-dalfopristin may be useful for treatment of organisms causing peritoneal dialysis-related peritonitis, including methicillin-resistant coagulase-negative staphylococci, methicillin-resistant Staphylococcus aureus, and vancomycin-resistant enterococci. The pharmacokinetic profiles of single intravenous doses of this combination streptogramin antibiotic of 7.5 mg/kg of body weight were characterized for eight noninfected patients receiving continuous ambulatory peritoneal dialysis. Comparison was made to pharmacokinetic profiles determined for eight healthy volunteers matched by age, sex, and race. Drug was measured in dialysate up to 6 h following the dose. Plasma and dialysate were assayed for parent compounds and metabolites. Mean pharmacokinetic parameters were compared between groups. No statistically significant differences were observed between groups for maximal concentrations in plasma, times to maximal concentration, areas under the curve, distribution volumes, rates of total body clearance, or half-lives in plasma for quinupristin and dalfopristin. No statistically significant differences were observed in maximal concentrations in plasma, times to maximal concentration, areas under the curve, or half-lives for cysteine, the glutathione conjugates of quinupristin, or the pristinamycin IIA metabolite of dalfopristin. The measurements in dialysate of the parent and most metabolites were below the expected MICs. Dialysis clearance was insignificant. Quinupristin-dalfopristin was well tolerated in both groups, causing only mild adverse events that resolved prior to discharge from the study. The disposition of quinupristin, dalfopristin, or their primary metabolites following a single dose was unaltered in patients receiving peritoneal dialysis. Intravenous dosing of this antibiotic combination is unlikely to be adequate for the treatment of peritonitis associated with peritoneal dialysis.
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Affiliation(s)
- C A Johnson
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin 53706, USA.
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Le Liboux A, Pasquier O, Montay G. Simultaneous high-performance liquid chromatographic determination of quinupristin, dalfopristin and their main metabolites in human plasma. J Chromatogr B Biomed Sci Appl 1998; 708:161-8. [PMID: 9653958 DOI: 10.1016/s0378-4347(98)00005-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Quinupristin-dalfopristin (30:70, w/w) is a new streptogramin, which has been developed for intravenous use. A specific and sensitive HPLC method was developed to measure simultaneously quinupristin (RP 57669) and dalfopristin (RP 54476) and their main metabolites in human plasma. The metabolites measured by this method were RP 69012 (glutathione-conjugated) and RPR 100391 (cysteine-conjugated) from quinupristin and RP 12536 (natural pristinamycin IIA), from dalfopristin. Solid-phase extraction with disposable cartridges was combined with reversed-phase HPLC and fluorimetric detection for RP 57669, RP 69012 and RPR 100391 and UV detection for RP 54476 and RP 12536. The method provided good recovery and low limits of quantitation (0.025 mg l(-1) for RP 57669, RP 54476 and RP 12536, and of 0.010 mg l(-1) for RP 69012 and RPR 100391). The validated range of concentrations of the method was: 0.025-5000 mg l(-1) for RP 57669, RP 54476 and RP 12536 and 0.010-0.750 mg l(-1) for RP 69012 and RPR 100391.
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Affiliation(s)
- A Le Liboux
- Department of Drug Metabolism and Pharmacokinetics, Chemical and Pharmaceutical Development, Rhône-Poulenc Rorer France, Antony
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Barelli H, Lebeau A, Pasquier O, Vizzavona J, Delaere P, Vincent J, Martinez J, Checler F. 694 Development of immunological tools to identify the nature of Aβs in the various lesions observed in Alzheimer's disease. Neurobiol Aging 1996. [DOI: 10.1016/s0197-4580(96)80696-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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