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Le Merdy M, Szeto KX, Perrier J, Bolger MB, Lukacova V. PBPK Modeling Approach to Predict the Behavior of Drugs Cleared by Metabolism in Pregnant Subjects and Fetuses. Pharmaceutics 2024; 16:96. [PMID: 38258106 PMCID: PMC10820132 DOI: 10.3390/pharmaceutics16010096] [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: 12/14/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 01/24/2024] Open
Abstract
This study aimed to develop a physiologically based pharmacokinetic (PBPK) model that simulates metabolically cleared compounds' pharmacokinetics (PK) in pregnant subjects and fetuses. This model accounts for the differences in tissue sizes, blood flow rates, enzyme expression levels, plasma protein binding, and other physiological factors affecting the drugs' PK in both the pregnant woman and the fetus. The PBPKPlus™ module in GastroPlus® was used to model the PK of metoprolol, midazolam, and metronidazole for both non-pregnant and pregnant groups. For each of the three compounds, the model was first developed and validated against PK data in healthy non-pregnant volunteers and then applied to predict the PK in the pregnant groups. The model accurately described the PK in both the non-pregnant and pregnant groups and explained well the differences in the plasma concentration due to pregnancy. When available, the fetal plasma concentration, placenta, and fetal tissue concentrations were also predicted reasonably well at different stages of pregnancy. The work described the use of a PBPK approach for drug development and demonstrates the ability to predict differences in PK in pregnant subjects and fetal exposure for metabolically cleared compounds.
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Affiliation(s)
- Maxime Le Merdy
- Simulations Plus, Inc., 42505 10th Street West, Lancaster, CA 93534, USA
| | - Ke Xu Szeto
- Simulations Plus, Inc., 42505 10th Street West, Lancaster, CA 93534, USA
| | - Jeremy Perrier
- PhinC Development, 36 Rue Victor Basch, 91300 Massy, France
| | - Michael B Bolger
- Simulations Plus, Inc., 42505 10th Street West, Lancaster, CA 93534, USA
| | - Viera Lukacova
- Simulations Plus, Inc., 42505 10th Street West, Lancaster, CA 93534, USA
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2
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Perrier J, Gualano V, Helmer E, Namour F, Lukacova V, Taneja A. Drug-drug interaction prediction of ziritaxestat using a physiologically based enzyme and transporter pharmacokinetic network interaction model. Clin Transl Sci 2023; 16:2222-2235. [PMID: 37667518 PMCID: PMC10651654 DOI: 10.1111/cts.13622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/17/2023] [Accepted: 08/11/2023] [Indexed: 09/06/2023] Open
Abstract
Ziritaxestat, an autotaxin inhibitor, was under development for the treatment of idiopathic pulmonary fibrosis. It is a substrate of cytochrome P450 3A4 (CYP3A4) and P-glycoprotein and a weak inhibitor of the CYP3A4 and OATP1B1 pathways. We developed a physiologically based pharmacokinetic (PBPK) network interaction model for ziritaxestat that incorporated its metabolic and transporter pathways, enabling prediction of its potential as a victim or perpetrator of drug-drug interactions (DDIs). Concurrently, we evaluated CYP3A4 autoinhibition, including time-dependent inhibition. In vitro information and clinical data from healthy volunteer studies were used for model building and validation. DDIs with rifampin, itraconazole, voriconazole, pravastatin, and rosuvastatin were predicted, followed by validation against a test dataset. DDIs of ziritaxestat as a victim or perpetrator were simulated using the final model. Predicted-to-observed DDI ratios for the maximum plasma concentration (Cmax ) and the area under the plasma concentration-time curve (AUC) were within a two-fold ratio for both the metabolic and transporter-mediated simulated DDIs. The predicted impact of autoinhibition/autoinduction or time-dependent inhibition of CYP3A4 was a 12% decrease in exposure. Model-based predictions for ziritaxestat as a victim of DDIs with a moderate CYP3A4 inhibitor (fluconazole) suggested a 2.6-fold increase in the AUC of ziritaxestat, while multiple doses of a strong inhibitor (voriconazole) would increase the AUC by 15-fold. Efavirenz would yield a three-fold decrease in the AUC of ziritaxestat. As a perpetrator, ziritaxestat was predicted to increase the AUC of the CYP3A4 index substrate midazolam by 2.7-fold. An overarching PBPK model was developed that could predict DDI liability of ziritaxestat for both CYP3A4 and the transporter pathways.
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Affiliation(s)
| | | | - Eric Helmer
- Early Development, ExscientiaOxfordUK
- Galapagos SASURomainvilleFrance
| | | | | | - Amit Taneja
- Galapagos SASURomainvilleFrance
- Simulations Plus, Inc.LancasterCaliforniaUSA
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3
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Martin T, Duivon M, Bessot N, Grellard JM, Emile G, Polvent S, Raoul L, Viader F, Eustache F, Joly F, Giffard B, Perrier J. Rest activity rhythms characteristics of breast cancer women following endocrine therapy. Sleep 2021; 45:6384813. [PMID: 34624895 DOI: 10.1093/sleep/zsab248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/22/2021] [Indexed: 01/20/2023] Open
Abstract
Rest-activity rhythm (RAR) disruptions are frequently associated with chemotherapy in breast cancer (BC), but they are less known in BC with endocrine therapy. The aim of this ancillary study was to characterize the RAR and estimated sleep characteristics from actigraphy in BC patients either treated (ET+) or untreated with endocrine therapy (ET-), compared to healthy controls (HC) and using a cross-sectional design. Eighteen ET+, 18 ET- and 16 HC completed questionnaires and wore wrist actigraphs at home for 2 weeks. Parametric and non-parametric RAR, sleep parameters, and quality of life were compared between groups (p<0.05). BC groups presented lower daytime activity than HC according to RAR analysis (mesor and M10 parameters). Compared to HC, ET- had lower inter-daily stability and ET+ had greater sleep complaints. Compared to ET-, ET+ had lower sleep efficiency, more time awake and higher activity levels at night, as assessed with actigraphy. Our results suggest an effect of cancer independent of treatment on RAR in BC, highlighting the need for further investigation of this topic. In contrast, sleep as assessed with actigraphy seems modified only during ET which matches with patients' sleep complaints. Further longitudinal studies would aid in confirming the latter hypothesis.
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Affiliation(s)
- T Martin
- Le Mans University, Movement - Interactions, Performance, MIP, EA 4334, Faculty of Sciences and Technologies, Avenue Olivier Messiaen, Le Mans, France
| | - M Duivon
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - N Bessot
- UNICAEN, INSERM, COMETE, GIP CYCERON, Normandie University , Caen, France
| | - J M Grellard
- Departments of Clinical Research Unit and Medical Oncology, Caen, France.,Institut Normand du Sein, Centre François Baclesse, Caen, France
| | - G Emile
- Departments of Clinical Research Unit and Medical Oncology, Caen, France.,Institut Normand du Sein, Centre François Baclesse, Caen, France
| | - S Polvent
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - L Raoul
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - F Viader
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - F Eustache
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
| | - F Joly
- Departments of Clinical Research Unit and Medical Oncology, Caen, France.,Institut Normand du Sein, Centre François Baclesse, Caen, France.,CHU Côte de Nacre, Caen, France.,INSERM, Normandie Univ, UNICAEN, U1086 ANTICIPE, Caen, France.,Cancer and Cognition Platform, Ligue Nationale Contre le Cancer, 14076, Caen, France
| | - B Giffard
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France.,Cancer and Cognition Platform, Ligue Nationale Contre le Cancer, 14076, Caen, France
| | - J Perrier
- Normandie Univ, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, Caen, France
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McPherson S, Perrier J, Dunn C, Khadra I, Davidson S, Ainousah B, Wilson CG, Halbert G. Small scale design of experiment investigation of equilibrium solubility in simulated fasted and fed intestinal fluid. Eur J Pharm Biopharm 2020; 150:14-23. [PMID: 32035969 DOI: 10.1016/j.ejpb.2020.01.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 11/11/2019] [Accepted: 01/22/2020] [Indexed: 12/19/2022]
Abstract
It is widely recognised that drug solubility within the gastrointestinal tract (GIT) differs from values determined in a simple aqueous buffer and to circumvent this problem measurement in biorelevant fluids is determined. Biorelevant fluids are complex mixtures of components (sodium taurocholate, lecithin, sodium phosphate, sodium chloride, pancreatin and sodium oleate) at various concentrations and pH levels to provide systems simulating fasted (FaSSIF) or fed (FeSSIF) intestinal media. Design of Experiment (DoE) studies have been applied to investigate FaSSIF and FeSSIF and indicate that a drug's equilibrium solubility varies over orders of magnitude, is influenced by the drug type and individual or combinations of media components, with some of these interactions being drug specific. Although providing great detail on the drug media interactions these studies are resource intensive requiring up to ninety individual experiments for FeSSIF. In this paper a low sample number or reduced DoE system has been investigated by restricting components with minimal solubility impact to a single value and only investigating variations in the concentrations of sodium taurocholate, lecithin, sodium oleate, pH and additionally in the case of fed media, monoglyceride. This reduces the experiments required to ten (FaSSIF) and nine (FeSSIF). Twelve poorly soluble drugs (Ibuprofen, Valsartan, Zafirlukast, Indomethacin, Fenofibrate, Felodipine, Probucol, Tadalafil, Carvedilol, Aprepitant, Bromocriptine and Itraconazole) were investigated and the results compared to published DoE studies and literature solubility values in human intestinal fluid (HIF), FaSSIF or FeSSIF. The solubility range determined by the reduced DoE is statistically equivalent to the larger scale published DoE results in over eighty five percent of the cases. The reduced DoE range also covers HIF, FaSSIF or FeSSIF literature solubility values. In addition the reduced DoE provides lowest measured solubility values that agree with the published DoE values in ninety percent of the cases. However, the reduced DoE only identified single and in some cases none of the major components influencing solubility in contrast to the larger published DoE studies which identified multiple individual components and component interactions. The identification of significant components within the reduced DoE was also dependent upon the drug and system under investigation. The study demonstrates that the lower experimental number reduces statistical power of the DoE to resolve the impact of media components on solubility. However, in a situation where only the solubility range is required the reduced DoE can provide the desired information, which will be of benefit during in vitro development studies. Further refinements are possible to extend the reduced DoE protocol to improve biorelevance and application into areas such as PBPK modelling.
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Affiliation(s)
- Stephanie McPherson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Jeremy Perrier
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Claire Dunn
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
| | - Scott Davidson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Bayan Ainousah
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Clive G Wilson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gavin Halbert
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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5
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Abstract
Oral administration of a solid dosage form requires drug dissolution in the gastrointestinal tract before absorption. Solubility is a key factor controlling dissolution, and it is recognized that, within the intestinal tract, this is influenced by the luminal fluid pH, amphiphile content, and composition. Various simulated intestinal fluid recipes have been introduced to mimic this behavior and studied using a range of different experimental techniques. In this article, we have measured equilibrium solubility utilizing a novel four component mixture design (4CMD) with biorelevant amphiphiles (bile salt, phospholipid, oleate, and monoglyceride) within a matrix of three pH values (5, 6, and 7) and total amphiphile concentrations (11.7, 30.6, and 77.5 mM) to provide a topographical and statistical overview. Three poorly soluble drugs representing acidic (indomethacin), basic (carvedilol), and neutral (fenofibrate) categories have been studied. The macroscopic solubility behavior agrees with literature and exhibits an overall increasing solubility from low pH and total amphiphile concentration to high pH and total amphiphile concentration. Within the matrix, all three drugs display different topographies, which can be related to the statistical effect levels of the individual amphiphiles or amphiphile interactions on solubility. The study also identifies previously unreported three and four way factor interactions notably between bile salt, phospholipid, pH, and total amphiphile concentration. In addition, the results also reveal that solubility variability is linked to the number of amphiphiles and the respective ratios in the measurement fluid, with the minimum variation present in systems containing all four amphiphiles. The individual 4CMD experiments within the matrix can be linked to provide a possible intestinal solubility window for each drug that could be applied in PBPK modeling systems. Overall the approach provides a novel overview of intestinal solubility topography along with greater detail on the impact of the various factors studied; however, each matrix requires 351 individual solubility measurements. Further studies will be required to refine the experimental protocol in order the maximize information garnered while minimizing the number of measurements required.
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Affiliation(s)
- Claire Dunn
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Jeremy Perrier
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Clive G. Wilson
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gavin W. Halbert
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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Jammes H, Gasselin M, Notebaert L, Foucras G, Perrier J, Jouneau L, Prézelin A, Leroux C, Pires J, Richard C, Gelin V, Weber M, Kiefer H. PSXVI-12 Long term effects of cloning by nuclear transfer on monocytes methylome in Dairy Cattle. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | - G Foucras
- Ecole Nationale Vétérinaire de Toulouse (ENVT),Toulouse, France
| | | | | | | | - C Leroux
- INRA, Saint-Genes-Champanelle,France
| | - J Pires
- INRA, Saint-Genes-Champanelle,France
| | | | | | - M Weber
- CNRS, Université de Strasbourg, Strasbourg cedex,France
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7
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Kiefer H, Perrier J, Sellem E, Prézelin A, Gasselin M, Jouneau L, Piumi F, Al Adhami H, Weber M, Fritz S, Boichard D, Le Danvic C, Schibler L, Jammes H. 118 Contribution of sperm methylome to bull fertility and interactions with DNA polymorphism. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | | | | | | | | | | | - M Weber
- CNRS, Université de Strasbourg,Strasbourg, France
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Perrier J, Zhou Z, Dunn C, Khadra I, Wilson CG, Halbert G. Statistical investigation of the full concentration range of fasted and fed simulated intestinal fluid on the equilibrium solubility of oral drugs. Eur J Pharm Sci 2018; 111:247-256. [PMID: 28987539 PMCID: PMC5710999 DOI: 10.1016/j.ejps.2017.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 10/04/2017] [Accepted: 10/04/2017] [Indexed: 11/22/2022]
Abstract
Upon oral administration the solubility of a drug in intestinal fluid is a key property influencing bioavailability. It is also recognised that simple aqueous solubility does not reflect intestinal solubility and to optimise in vitro investigations simulated intestinal media systems have been developed. Simulated intestinal media which can mimic either the fasted or fed state consists of multiple components each of which either singly or in combination may influence drug solubility, a property that can be investigated by a statistical design of experiment technique. In this study a design of experiment covering the full range from the lower limit of fasted to the upper limit of fed parameters and using a small number of experiments has been performed. The measured equilibrium solubility values are comparable with literature values for simulated fasted and fed intestinal fluids as well as human fasted and fed intestinal fluids. The equilibrium solubility data range is statistically equivalent to a combination of published fasted and fed design of experiment data in six (indomethacin, phenytoin, zafirlukast, carvedilol, fenofibrate and probucol) drugs with three (aprepitant, tadalafil and felodipine) drugs not equivalent. In addition the measured equilibrium solubility data sets were not normally distributed. Further studies will be required to determine the reasons for these results however it implies that a single solubility measurement without knowledge of the solubility distribution will be of limited value. The statistically significant media factors which promote equilibrium solubility (pH, sodium oleate and bile salt) were in agreement with published results but the number of determined significant factors and factor interactions was fewer in this study, lecithin for example did not influence solubility. This may be due to the reduction in statistical sensitivity from the lower number of experimental data points or the fact that using the full range will examine media parameters ratios that are not biorelevant. Overall the approach will provide an estimate of the solubility range and the most important media factors but will not be equivalent to larger scale focussed studies. Further investigations will be required to determine why some drugs do not produce equivalent DoE solubility distributions, for example combined fasted and fed DoE, but this simply may be due to the complexity and individuality of the interactions between a drug and the media components.
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Affiliation(s)
- Jeremy Perrier
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Zhou Zhou
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Claire Dunn
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Clive G Wilson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gavin Halbert
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
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Ainousah B, Perrier J, Dunn C, Khadra I, Wilson CG, Halbert G. Dual Level Statistical Investigation of Equilibrium Solubility in Simulated Fasted and Fed Intestinal Fluid. Mol Pharm 2017; 14:4170-4180. [PMID: 29072917 PMCID: PMC5735376 DOI: 10.1021/acs.molpharmaceut.7b00869] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 10/24/2017] [Accepted: 10/26/2017] [Indexed: 11/28/2022]
Abstract
The oral route is the preferred option for drug administration but contains the inherent issue of drug absorption from the gastro-intestinal tract (GIT) in order to elicit systemic activity. A prerequisite for absorption is drug dissolution, which is dependent upon drug solubility in the variable milieu of GIT fluid, with poorly soluble drugs presenting a formulation and biopharmaceutical challenge. Multiple factors within GIT fluid influence solubility ranging from pH to the concentration and ratio of amphiphilic substances, such as phospholipid, bile salt, monoglyceride, and cholesterol. To aid in vitro investigation simulated intestinal fluids (SIF) covering the fasted and fed state have been developed. SIF media is complex and statistical design of experiment (DoE) investigations have revealed the range of solubility values possible within each state due to physiological variability along with the media factors and factor interactions which influence solubility. However, these studies require large numbers of experiments (>60) and are not feasible or sensible within a drug development setting. In the current study a smaller dual level, reduced experimental number (20) DoE providing three arms covering the fasted and fed states along with a combined analysis has been investigated. The results indicate that this small scale investigation is feasible and provides solubility ranges that encompass published data in human and simulated fasted and fed fluids. The measured fasted and fed solubility ranges are in agreement with published large scale DoE results in around half of the cases, with the differences due to changes in media composition between studies. Indicating that drug specific behaviors are being determined and that careful media factor and concentration level selection is required in order to determine a physiologically relevant solubility range. The study also correctly identifies the major single factor or factors which influence solubility but it is evident that lower significance factors (for example bile salt) are not picked up due to the lower sample number employed. A similar issue is present with factor interactions with only a limited number available for study and generally not determined to have a significant solubility impact due to the lower statistical power of the study. The study indicates that a reduced experimental number DoE is feasible, will provide solubility range results with identification of major solubility factors however statistical limitations restrict the analysis. The approach therefore represents a useful initial screening tool that can guide further in depth analysis of a drug's behavior in gastrointestinal fluids.
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Affiliation(s)
- Bayan
E Ainousah
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Jeremy Perrier
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Claire Dunn
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Clive G Wilson
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gavin Halbert
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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10
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Perrier J, Jongen S, Vuurman E, Bocca M, Ramaekers J, Vermeeren A. Driving performance and EEG fluctuations during on-the-road driving following sleep deprivation. Biol Psychol 2016; 121:1-11. [DOI: 10.1016/j.biopsycho.2016.09.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 08/08/2016] [Accepted: 09/28/2016] [Indexed: 01/20/2023]
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11
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Graziani F, Pujol A, Nicoletti C, Dou S, Maresca M, Giardina T, Fons M, Perrier J. Ruminococcus gnavus E1 modulates mucin expression and intestinal glycosylation. J Appl Microbiol 2016; 120:1403-17. [PMID: 26868655 DOI: 10.1111/jam.13095] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 01/15/2016] [Accepted: 02/07/2016] [Indexed: 12/16/2022]
Abstract
AIMS The molecular cross-talk between commensal bacteria and the gut play an important role in the maintenance of the intestinal homeostasis and general health. Here, we studied the impact of a major Gram-positive anaerobic bacterium of the human gut microbiota, that is, Ruminococcus gnavus on the glycosylation pattern and the production of intestinal mucus by the goblet cells. METHODS AND RESULTS Our results showed that R. gnavus E1 specifically increases the expression and the glycosylation level of the intestinal glyco-conjugates by goblet cells in the colonic mucosa of mono-associated mice with R. gnavus E1 as well as in human HT29-MTX cells. Such an effect was mediated through induction of the level of mRNA encoding for the major intestinal gel-forming mucin such as MUC2 and various glycosyltransferase enzymes. CONCLUSIONS This study demonstrates for the first time that R. gnavus E1 possess the ability to modulate the glycosylation profile of the glyco-conjugate molecules and mucus in goblet cells. SIGNIFICANCE AND IMPACT OF THE STUDY Furthermore, we demonstrated that R. gnavus E1 modified specifically the glycosylation pattern and MUC2 expression by means of a small soluble factor of peptidic nature (<3 kDa) and heat stable in the HT29-MTX cell.
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Affiliation(s)
- F Graziani
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
| | - A Pujol
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
| | - C Nicoletti
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
| | - S Dou
- UP 2012.10.120.EGEAL, Institut Polytechnique, La Salle Beauvais, France
| | - M Maresca
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
| | - T Giardina
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
| | - M Fons
- IMM UMR 7283, CNRS, Aix Marseille Université, Marseille, France
| | - J Perrier
- iSm2 UMR 7313, CNRS, Centrale Marseille, Aix Marseille Université, Marseille, France
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Perrier J, Chavoix C, Bocca M. Functioning of the three attentional networks and vigilance in primary insomnia. Sleep Med 2015; 16:1569-75. [DOI: 10.1016/j.sleep.2015.06.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 06/17/2015] [Accepted: 06/24/2015] [Indexed: 01/17/2023]
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13
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Perrier J, Leufkens T, Bulla J, Jongen S, Bocca M, Ramaekers J, Vermeeren A. Electroencephalography during on-the-road driving in older untreated insomnia patients and normal sleepers. Biol Psychol 2015; 109:20-8. [DOI: 10.1016/j.biopsycho.2015.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 03/20/2015] [Accepted: 04/02/2015] [Indexed: 11/26/2022]
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14
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Jolly C, Raffy F, Audibert G, Perrier J, Quilliot D. CP-038 Adequacy of nutrition energy delivery in surgical intensive care. Eur J Hosp Pharm 2015. [DOI: 10.1136/ejhpharm-2015-000639.36] [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: 11/03/2022] Open
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15
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Perrier J, Bertran F, Couque C, Clochon P, Denise P, Bocca M. Spectral analysis in untreated primary insomniacs: evidence for cortical hyperarousal and prefrontal hypometabolism during sleep. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.035] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Perrier J, Leufkens T, Ramaekers J, Bocca M, Vuurman E, Vermeeren A. Electroencephalographic correlates of on-the-road driving fatigue in untreated insomniac patients. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.034] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Magot A, Ollivier Y, Latour P, Perrier J, Mercier S, Maisonobe T, Pereon Y. P.6.10 Phenotypic variability in a French family presenting with seipinopathy. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.481] [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: 10/26/2022]
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Tsurusaki Y, Okamoto N, Ohashi H, Mizuno S, Matsumoto N, Makita Y, Fukuda M, Isidor B, Perrier J, Aggarwal S, Dalal AB, Al-Kindy A, Liebelt J, Mowat D, Nakashima M, Saitsu H, Miyake N, Matsumoto N. Coffin-Siris syndrome is a SWI/SNF complex disorder. Clin Genet 2013; 85:548-54. [PMID: 23815551 DOI: 10.1111/cge.12225] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/28/2013] [Indexed: 12/12/2022]
Abstract
Coffin-Siris syndrome (CSS) is a congenital disorder characterized by intellectual disability, growth deficiency, microcephaly, coarse facial features, and hypoplastic or absent fifth fingernails and/or toenails. We previously reported that five genes are mutated in CSS, all of which encode subunits of the switch/sucrose non-fermenting (SWI/SNF) ATP-dependent chromatin-remodeling complex: SMARCB1, SMARCA4, SMARCE1, ARID1A, and ARID1B. In this study, we examined 49 newly recruited CSS-suspected patients, and re-examined three patients who did not show any mutations (using high-resolution melting analysis) in the previous study, by whole-exome sequencing or targeted resequencing. We found that SMARCB1, SMARCA4, or ARID1B were mutated in 20 patients. By examining available parental samples, we ascertained that 17 occurred de novo. All mutations in SMARCB1 and SMARCA4 were non-truncating (missense or in-frame deletion) whereas those in ARID1B were all truncating (nonsense or frameshift deletion/insertion) in this study as in our previous study. Our data further support that CSS is a SWI/SNF complex disorder.
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Affiliation(s)
- Y Tsurusaki
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Corre B, Perrier J, Khouri ME, Cerboni S, Pellegrini S, Michel F. P171 Costimulation of IL-10 expression by type I interferon in human CD4 T cells. Cytokine 2012. [DOI: 10.1016/j.cyto.2012.06.273] [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: 10/28/2022]
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Arzalier-Daret S, Bocca ML, Amato JN, Berthelon C, Perrier J, Denise P, Hanouz JL. Est-il dangereux de conduire après une nuit de garde ? Une étude en simulation de conduite. Neurophysiol Clin 2012. [DOI: 10.1016/j.neucli.2012.02.040] [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: 11/17/2022] Open
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Mahe JY, Kieny P, N’guyen Te Tich S, Perrier J, Magot A, Durigneux J, Deries X, David A, Isidor B, Le Fort M, Mussini JM, Perraud-Gouin AS, Liorit C, Chasserrieau R, Chevalier MB, Lafaye-Meret N, Penisson I, Pereon Y. Évolution, activités et orientations des consultations multidisciplinaires des maladies neuromusculaires du centre de référence des maladies rares Nantes-Angers. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.480] [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: 10/17/2022]
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Bru M, Perrier J. SFP-P016 – Neurologie – Que suspecter devant un pic d’acide vanillactique sur la chromatographie des acides organiques ? Arch Pediatr 2008. [DOI: 10.1016/s0929-693x(08)72152-3] [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: 11/25/2022]
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Herga S, Berrin JG, Perrier J, Puigserver A, Giardina T. Identification of the zinc binding ligands and the catalytic residue in human aspartoacylase, an enzyme involved in Canavan disease. FEBS Lett 2006; 580:5899-904. [PMID: 17027983 DOI: 10.1016/j.febslet.2006.09.056] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 06/19/2006] [Revised: 09/08/2006] [Accepted: 09/24/2006] [Indexed: 11/20/2022]
Abstract
Canavan disease is an autosomal-recessive neurodegenerative disorder caused by a lack of aspartoacylase, the enzyme that degrades N-acetylaspartate (NAA) into acetate and aspartate. With a view to studying the mechanisms underlying the action of human aspartoacylase (hASP), this enzyme was expressed in a heterologous Escherichia coli system and characterized. The recombinant protein was found to have a molecular weight of 36 kDa and kinetic constants K(m) and k(cat) of 0.20 +/- 0.03 mM and 14.22 +/- 0.48 s(-1), respectively. Sequence alignment showed that this enzyme belongs to the carboxypeptidase metalloprotein family having the conserved motif H(21)xxE(24)(91aa)H(116). We further investigated the active site of hASP by performing modelling studies and site-directed mutagenesis. His21, Glu24 and His116 were identified here for the first time as the residues involved in the zinc-binding process. In addition, mutations involving the Glu178Gln and Glu178Asp residues resulted in the loss of enzyme activity. The finding that wild-type and Glu178Asp have the same K(m) but different k(cat) values confirms the idea that the carboxylate group contributes importantly to the enzymatic activity of aspartoacylase.
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Affiliation(s)
- S Herga
- Université Paul Cézanne, Biosciences FRE-3005 (Université Aix Marseille III/CNRS), Laboratoire de Biochimie et Biologie de la Nutrition, Av Escardrille Nomandie Niemen, 13397 Marseille Cedex 20, France
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Stocker P, Yousfi M, Djerridane O, Perrier J, Amziani R, El Boustani S, Moulin A. Effect of flavonoids from various Mediterranean plants on enzymatic activity of intestinal carboxylesterase. Biochimie 2005; 86:919-25. [PMID: 15667942 DOI: 10.1016/j.biochi.2004.09.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [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: 03/08/2004] [Accepted: 09/13/2004] [Indexed: 11/27/2022]
Abstract
Flavonol compounds of three Mediterranean plants from the Algerian Atlas used traditionally in Arab folk medicine, Arenaria serpyllifolia, Rhamnus alaternus and Thapsia garganica, were found to inhibit the enzymatic activities of both rat intestine and purified porcine liver carboxylesterase in a concentration-dependent manner. Results indicate that the flavonol compounds from the aerial part of these plants lead to the inactivation of the CE pI = 5.1 with Ki of micromolar range. These results encourage us to perform further biological investigation.
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Affiliation(s)
- P Stocker
- Institut Méditerranéen de Recherche en Nutrition, Faculté des Sciences de St-Jérôme, Université d'Aix-Marseille, 13397 Marseille cedex 20, France.
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Stocker P, Yousfi M, Salmi C, Perrier J, Brunel JM, Moulin A. Maackiain 3-O-(6′-O-malonyl-β-D-glucopyranoside) from Oudneya africana, a powerful inhibitor of porcine kidney acylase I. Biochimie 2005; 87:507-12. [PMID: 15935275 DOI: 10.1016/j.biochi.2005.02.010] [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: 10/28/2004] [Revised: 01/21/2005] [Accepted: 02/23/2005] [Indexed: 11/25/2022]
Abstract
The inhibitory effect of phenolic extracts of several plants from the Algerian Atlas used traditionally in Arab folk medicine was tested on the porcine kidney acylase I activity. An endemic Saharan plant of the Brassicaceae family, Oudneya africana, has shown a strong inhibitory effect. The active compound was isolated and purified by semi-preparative HPLC and HPLC-photodiode array detection, and structurally determined using 1H, 13C NMR and mass spectroscopy methods. Results indicate that maackiain 3-O-(6'-O-malonyl-beta-D-glucopyranoside) showed a competitive inhibition of porcine kidney acylase I with a Ki value of 11 microM. The malonyl moiety appeared to be a structural key element for the inhibitory activity. This observation indicates interesting structure-activity relationships for the inhibitory action of this compound on the acylase I and its potential role in the toxicity of haloalkene-derived mercapturates and that of the enzyme in detoxication and bioactivation.
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Affiliation(s)
- P Stocker
- Université Paul Cézanne, Institut méditerranéen de recherche en nutrition, Faculté des sciences de St-Jérôme, avenue escadrille Normandie Niemen, 13397 Marseille cedex 20, France.
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Giardina T, Perrier J, Puigserver A. The rat kidney acylase I, characterization and molecular cloning. Differences with other acylases I. Eur J Biochem 2000; 267:6249-55. [PMID: 11012679 DOI: 10.1046/j.1432-1327.2000.01712.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The soluble acylase I from rat kidney was purified to homogeneity using a five-step procedure. As the resulting protein was found to have a relative molecular mass of 125 kDa based on size-exclusion chromatography and 44 kDa based on SDS/PAGE, the native protein was taken to consist of three subunits. The amino-acid sequence of a peptide resulting from limited proteolysis of the polypeptide chain with proteinase K, which was determined by microsequencing (RHEFHALRAGFALDEGLA), was found to be very similar to the corresponding sequence of porcine kidney acylase I. However, as N-furyl-acryloyl-L-methionine, a synthetic substrate for porcine acylases, was not hydrolyzed by the rat enzyme, it was suggested that the polypeptide chain might differ in other respects from those of the other acylases I. A full length cDNA coding for the rat kidney acylase I was therefore isolated and found to contain a 1224-bp open reading frame encoding a protein consisting of 408 amino-acid residues, which corresponded to a calculated molecular mass of 45 847 Da per subunit. The deduced amino-acid sequence showed 93.6% and 87.2% identity with that of the human liver and porcine kidney, respectively.
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Affiliation(s)
- T Giardina
- Institut Méditerranéen de Recherche en Nutrition, CNRS-ESA 6033, Faculté des Sciences et Techniques Saint-Jérôme, Marseille Cedex 20, France
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Raphel V, Giardina T, Guevel L, Perrier J, Dupuis L, Guo XJ, Puigserver A. Cloning, sequencing and further characterization of acylpeptide hydrolase from porcine intestinal mucosa. Biochim Biophys Acta 1999; 1432:371-81. [PMID: 10407158 DOI: 10.1016/s0167-4838(99)00087-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Acylpeptide hydrolase was purified to homogeneity from porcine intestinal mucosa using a seven-step procedure including ammonium sulfate precipitation, gel filtration as well as anion exchange and affinity chromatography. The specific activity of the enzyme reached 105000 nmol/mg protein per min and the purification was as high as 5500-fold. This tetrameric enzyme is composed of four apparently identical subunits, the molecular mass of which was estimated to be 75 kDa, based on the results of amino acid analysis and gel electrophoresis performed under denaturing conditions. It is likely that the NH(2)-terminal residue may be acetylated, while serine was found to be the COOH-terminal residue. The hydrolytic activity of the enzyme toward N-acetyl-L-alanine p-nitroanilide at the optimum pH value was increased twofold in the presence of the chloride anion. The K(m) value calculated from the kinetics of the hydrolysis of acetylalanyl peptides was found to be 0.7+/-0.1 mM, whereas the V(max) values decreased from 200 to 50 nmol/min per microgram of enzyme, depending on the peptidic chain lengths. The V(max) value of the synthetic substrate (250 nmol/min per microgram of enzyme) was 25-500% higher than those of the acetylalanyl peptides, depending on the peptide chain length, although the enzyme affinity was slightly lower (1.8 mM as compared with 0.7 mM). In line with data on other animal species and on various tissues, the enzyme seemed likely to be a serine protease, since it was readily inhibited by diisopropyl fluorophosphate and diethyl pyrocarbonate. A 2377-nucleotide long cDNA coding for the enzyme was isolated from pig small intestine. The deduced amino acid sequence consisted of 731 residues and showed a single different amino acid with that of the porcine liver APH, except the N-terminal amino acid which is still probably lacking.
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Affiliation(s)
- V Raphel
- Laboratoire de Biochimie et Biologie de la Nutrition, CNRS-ESA 6033, Faculté des Sciences et Techniques de St-Jérôme, 13397, Marseille Cédex 20, France
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Cabirol N, Villemur R, Perrier J, Jacob F, Fouillet B, Chambon P. Isolation of a methanogenic bacterium, Methanosarcina sp. strain FR, for its ability to degrade high concentration of perchloroethylene. Can J Microbiol 1998; 44:1142-7. [PMID: 10383226 DOI: 10.1139/cjm-44-12-1142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Tetrachloroethylene (PCE) is a toxic compound essentially used as a degreasing and dry-cleaning solvent. A methanogenic and sulfate-reducing consortium that dechlorinates and mineralizes high concentrations of PCE was derived from anaerobically digested sludge obtained from a waste water treatment plant (Bourg-en-Bresse, France). A methanogenic bacterium, strain FR, was isolated from this acclimated consortium. On the basis of morphological and physiological characteristics, strain FR was classified in the genus of Methanosarcina. Phylogeny analysis with the 16S rRNA gene sequence revealed that strain FR is highly related to Methanosarcina mazei and Methanosarcina frisia (99.6 and 99.5% identity, respectively). High concentrations (50-87 microM) of PCE were completely dechlorinated by strain FR cultures at the rate of 76 nM-mg protein(-1).day(-1). PCE dechlorination produced a nonidentified compound. The tracer experiments with [13C]PCE revealed that the product was nonchlorinated. Dechlorination of PCE to trichloroethylene was still active in the presence of boiled cell extract of the strain FR. However, no further dechlorination was observed. This result suggests that a cofactor rather than an enzymatic system is responsible for the first dechlorination of PCE. Dechlorination-active fractions purified from cell extracts on a XAD-4 column revealed the presence of F(420), F(430), and cobamides cofactors. This is the first report of the isolation of a methanogenic bacterium with the ability to dechlorinate high concentrations of PCE to a nonchlorinated product.
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Affiliation(s)
- N Cabirol
- Laboratoire de microbiologie appliquée et industrielle. Université Claude Bernard-Lyon I.
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Ferey-Roux G, Perrier J, Forest E, Marchis-Mouren G, Puigserver A, Santimone M. The human pancreatic alpha-amylase isoforms: isolation, structural studies and kinetics of inhibition by acarbose. Biochim Biophys Acta 1998; 1388:10-20. [PMID: 9774702 DOI: 10.1016/s0167-4838(98)00147-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A rapid method is proposed for isolating the two main components of human pancreatic alpha-amylase (HPA I and HPA II). The isoelectric point of HPA I (7.2), the main component, was determined using an isoelectrofocusing method and found to differ from that of HPA II (6. 6). The molecular mass of HPA I (55862+/-5 Da) and that of HPA II (55786+/-5 Da) were determined by performing mass spectrometry and found to be quite similar to that of the protein moiety calculated from the amino acid sequence (55788 Da), which indicates that the human amylase is not glycosylated. The structure of both HPA I and HPA II was further investigated by performing limited proteolysis. Two fragments with an apparent molecular mass of 41 kDa and 14 kDa were obtained by digesting the isoforms with proteinase K and subtilisin, whereas digestion with papain yielded two cleaved fragments with molecular masses of 38 kDa and 17 kDa. Proteinase K and subtilisin susceptible bonds are located in the L8 loop (A domain), while the papain cut which occurs in the presence of the calcium chelator EDTA is in the L3 loop (B domain). The kinetics of the inhibition of HPA I and HPA II by acarbose, a drug used to treat diabetes and obesity, were studied using an amylose substrate. The Lineweaver-Burk primary plots of HPA I and HPA II, which did not differ significantly, indicated that the inhibition was of the mixed non-competitive type. The secondary plots gave parabolic curves. All in all, these data provide evidence that two acarbose molecules bind to HPA. In conclusion, apart from the pI, no significant differences were observed between HPA I and HPA II as regards either their molecular mass and limited proteolysis or their kinetic behavior. As was to be expected in view of the high degree of structural identity previously found to exist between human and porcine pancreatic amylases, the present data show that the inhibitory effects of acarbose on the kinetic behavior of these two amylases are quite comparable. In particular, the process of amylose hydrolysis catalyzed by HPA as well as by PPA in both cases requires two carbohydrate binding sites in addition to the catalytic site.
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Affiliation(s)
- G Ferey-Roux
- Laboratoire de Biochimie et Biologie de la Nutrition, CNRS-ESA 6033, Faculté des Sciences et Techniques de St. Jérôme, Université d'Aix-Marseille, 13397 Marseille cedex 20, France
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Cabirol N, Perrier J, Jacob F, Fouillet B, Chambon P. Role of methanogenic and sulfate-reducing bacteria in the reductive dechlorination of tetrachloroethylene in mixed culture. Bull Environ Contam Toxicol 1996; 56:817-824. [PMID: 8661867 DOI: 10.1007/s001289900119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- N Cabirol
- Laboratoire de Microbiologie Appliquée et Industrielle, Université Claude Bernard-Lyon I, Villeurbanne, France
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Coffman D, Dubois GP, Eigen G, Hauser J, Hitlin DG, Matthews CG, Mincer A, Richman JD, Wisniewski WJ, Zhu Y, Burchell M, Dorfan DE, Drinkard J, Gatto C, Hamilton RP, Heusch CA, Köpke L, Lockman WS, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Weinstein AJ, Xu R, Becker JJ, Blaylock GT, Eisenstein BI, Freese T, Gladding G, Izen JM, Plaetzer SA, Simopoulos C, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Mallik U, Adler J, Bolton T, Brient JC, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Grab C, Mozley RF, Odian A, Pitman D, Schindler RH, Stockhausen W, Toki W, Villa F, Wasserbaech S, Wermes N, Wisinski D, Brown JS, Burnett TH, Cook V, Duncan AL, Li A, Mir R, Mockett PM. Erratum: Measurements of J/ psi decays into a vector and a pseudoscalar meson. Phys Rev D Part Fields 1989; 40:3788. [PMID: 10021618 DOI: 10.1103/physrevd.40.3788.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Adler J, Becker JJ, Blaylock GT, Bolton T, Brient JC, Brown JS, Bunnell KO, Burchell M, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Drinkard J, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gatto C, Gladding G, Grab C, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Izen JM, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mincer A, Mir R, Mockett PM, Mozley RF, Nemati B, Odian A, Parrish L, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Weseler S. Erratum: Search for the decay D0-->e+e-. Phys Rev D Part Fields 1989; 40:3788. [PMID: 10011763 DOI: 10.1103/physrevd.40.3788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Coffman D, Dubois GP, Eigen G, Hauser J, Hitlin DG, Matthews CG, Richman JD, Wisniewski WJ, Zhu Y, Burchell M, Dorfan DE, Drinkard J, Gatto C, Hamilton RP, Heusch CA, Köpke L, Lockman WS, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Weinstein AJ, Xu R, Becker JJ, Blaylock GT, Eisenstein BI, Freese T, Gladding G, Izen JM, Plaetzer SA, Simopoulos C, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Mallik U, Adler J, Bolton T, Brient JC, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Grab C, Mozley RF, Odian A, Pitman D, Schindler RH, Stockhausen W, Toki W, Villa F, Wasserbaech S, Wermes N, Wisinski D, Brown JS, Burnett TH, Cook V, Duncan AL, Li A, Mir R, Mockett PM, Nemati B. Measurements of J/ psi decays into a vector and a pseudoscalar meson. Phys Rev D Part Fields 1988; 38:2695-2705. [PMID: 9959439 DOI: 10.1103/physrevd.38.2695] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Adler J, Becker JJ, Blaylock GT, Bolton T, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gladding G, Grab C, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Izen JM, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mir R, Mockett PM, Mozley RF, Nemati B, Odian A, Parrish L, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Xu R, Zhu Y. Search for the decay D+--> micro+ nu micro and an upper limit on the pseudoscalar decay constant. Phys Rev Lett 1988; 60:1375-1378. [PMID: 10038022 DOI: 10.1103/physrevlett.60.1375] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Adler J, Becker JJ, Blaylock GT, Bolton T, Brient JC, Brown JS, Bunnell KO, Burchell M, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Drinkard J, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gatto C, Gladding G, Grab C, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Izen JM, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mir R, Mockett PM, Mozley RF, Nemati B, Odian A, Parrish L, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Weseler S, Willutzki HJ. Search for the decay D0-->e+e-. Phys Rev D Part Fields 1988; 37:2023-2025. [PMID: 9958900 DOI: 10.1103/physrevd.37.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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Adler J, Becker JJ, Blaylock GT, Bolton T, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gladding G, Grab C, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Izen JM, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mir R, Mockett PM, Mozley RF, Nemati B, Odian A, Parrish L, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Xu R, Zhu Y. Reanalysis of charmed-D-meson branching fractions. Phys Rev Lett 1988; 60:89-92. [PMID: 10038206 DOI: 10.1103/physrevlett.60.89] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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37
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Adler J, Becker JJ, Blaylock GT, Bolton T, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gladding G, Grab C, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Izen JM, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mir R, Mockett PM, Mozley RF, Nemati B, Odian A, Parrish L, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Wolf G, Xu R. Measurement of the decay tau --> rho nu. Phys Rev Lett 1987; 59:1527-1529. [PMID: 10035259 DOI: 10.1103/physrevlett.59.1527] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Coffman D, Dubois G, Eigen G, Hauser J, Hitlin DG, Matthews CG, Richman JD, Wisniewski WJ, Zhu Y, Dorfan DE, Grancagnolo F, Hamilton RP, Heusch CA, Köpke L, Lockman WS, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Weinstein AJ, Xu R, Becker JJ, Blaylock GT, Eisenstein BI, Freese T, Gladding G, Izen JM, Plaetzer SA, Simopoulos C, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Wattenberg A, Adler J, Bolton T, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Grab C, Mallik U, Mozley RF, Odian A, Pitman D, Schindler RH, Stockhausen W, Toki W, Villa F, Wasserbaech S, Wermes N, Wisinski D, Brown JS, Burnett TH, Cook V, Duncan AL, Li AD, Mir R, Mockett PM, Nemati B, Parrish L, Willutzki HJ. Upper limit on B( tau --> eta pi nu ). Phys Rev D Part Fields 1987; 36:2185-2187. [PMID: 9958420 DOI: 10.1103/physrevd.36.2185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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39
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Becker JJ, Blaylock GT, Bolton T, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dorfan DE, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Freese T, Gladding G, Grancagnolo F, Grab C, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Li A, Lockman WS, Mallik U, Matthews CG, Mockett PM, Mozley RF, Nemati B, Odian A, Partridge R, Perrier J, Pitman D, Plaetzer SA, Richman JD, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Spadafora AL, Stockdale IE, Stockhausen W, Thaler JJ, Toki W, Tripsas B, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Xu R, Zhu Y. Study of the KK-bar pi final state in J/ psi hadronic decays. Phys Rev Lett 1987; 59:186-189. [PMID: 10035474 DOI: 10.1103/physrevlett.59.186] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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40
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Baltrusaitis RM, Coffman D, Dubois G, Eigen G, Hauser J, Hitlin DG, Matthews CG, Richman JD, Russell JJ, Zhu Y, Bolton T, Bunnell KO, Cassell RE, Coward DH, Dado S, Favart D, Einsweiler KF, Mallik U, Mozley RF, Odian A, Roehrig J, Schindler RH, Stockhausen W, Toki W, Villa F, Wasserbaech S, Wermes N, Wisinski DE, Wolf G, Dorfan DE, Fabrizio R, Grancagnolo F, Hamilton RP, Heusch CA, Köpke L, Lockman WS, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Weinstein AJ, Xu R, Becker JJ, Blaylock GT, Eisenstein BI, Freese T, Gladding G, Plaetzer SA, Simopoulos C, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Wattenberg A, Wisniewski WJ, Brown JS, Burnett TH, Cook V, Duncan AL, Guy AD, Mockett PM, Nappi A. Radiative decays of the J/ psi into gamma pi + pi - and gamma K+K-. Phys Rev D Part Fields 1987; 35:2077-2091. [PMID: 9957896 DOI: 10.1103/physrevd.35.2077] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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41
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Baltrusaitis RM, Becker JJ, Blaylock GT, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dado S, Dorfan DE, Dubois GP, Duncan AL, Einsweiler KF, Eisenstein BI, Fabrizio R, Gladding G, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Lockman WS, Mallik U, Mockett PM, Mozley RF, Nappi A, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig J, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Sleeman JC, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Toki W, Villa F, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Wolf G. Direct measurements of charmed-D-meson hadronic branching fractions. Phys Rev Lett 1986; 56:2140-2143. [PMID: 10032901 DOI: 10.1103/physrevlett.56.2140] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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42
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Baltrusaitis RM, Becker JJ, Blaylock GT, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dado S, Dorfan DE, Dubois GP, Duncan AL, Einsweiler KF, Eisenstein BI, Fabrizio R, Gladding G, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Lockman WS, Mallik U, Mockett PM, Mozley RF, Nappi A, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig J, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Sleeman JC, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Toki W, Villa F, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Wolf G. Search for nonspectator decays of the D0. Phys Rev Lett 1986; 56:2136-2139. [PMID: 10032900 DOI: 10.1103/physrevlett.56.2136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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Baltrusaitis RM, Coffman D, Hauser J, Hitlin DG, Richman JD, Russell JJ, Schindler RH, Dorfan DE, Fabrizio R, Grancagnolo F, Hamilton RP, Heusch CA, Köpke L, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Becker JJ, Blaylock GT, Brown JS, Cui H, Eisenstein BI, Gladding G, Plaetzer SA, Spadafora AL, Thaler JJ, Wattenberg A, Wisniewski WJ, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Moss L, Mozley RF, Odian A, Roehrig JR, Toki W, Unno Y, Villa F, Wermes N, Wisinski D, Wolf G, Burnett TH, Cook V, Duncan AL, Mockett PM, Nappi A, Sleeman JC, Willutzki AH. Study of the radiative decay J/ psi --> gamma rho rho. Phys Rev D Part Fields 1986; 33:1222-1232. [PMID: 9956755 DOI: 10.1103/physrevd.33.1222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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44
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Baltrusaitis RM, Becker JJ, Blaylock GT, Bolton T, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Cui H, Dado S, Dorfan DE, Dubois GP, Duncan AL, Eigen G, Einsweiler KF, Eisenstein BI, Fabrizio R, Favart D, Gladding G, Grancagnolo F, Guy AD, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Lockman WS, Mallik U, Matthews CG, Mockett PM, Moss L, Mozley RF, Nappi A, Nemati B, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig J, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Sleeman JC, Spadafora AL, Stockdale IE, Thaler JJ, Tripsas B, Toki W, Unno Y, Villa F, Wasserbaech S, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ. Observation of a narrow KK-bar state in J/ psi radiative decays. Phys Rev Lett 1986; 56:107-110. [PMID: 10032867 DOI: 10.1103/physrevlett.56.107] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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45
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Baltrusaitis RM, Coffman D, Hauser J, Hitlin DG, Richman JD, Russell JJ, Schindler RH, Dorfan DE, Fabrizio R, Grancagnolo F, Hamilton RP, Heusch CA, Köpke L, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Becker JJ, Blaylock GT, Brown JS, Cui H, Eisenstein BI, Gladding G, Plaetzer SA, Spadafora AL, Thaler JJ, Wattenberg A, Wisniewski WJ, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Moss L, Mozley RF, Odian A, Roehrig JR, Toki W, Unno Y, Villa F, Wermes N, Wisinski D, Burnett TH, Cook V, Duncan AL, Mockett PM, Nappi A, Sleeman JC, Willutzki HJ. J/ psi decays into a vector and a pseudoscalar meson and the quark content of the eta and eta '. Phys Rev D Part Fields 1985; 32:2883-2892. [PMID: 9956070 DOI: 10.1103/physrevd.32.2883] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Haber HE, Perrier J. Model-independent analysis of hadronic decays of J/ psi and eta c(2980). Phys Rev D Part Fields 1985; 32:2961-2970. [PMID: 9956080 DOI: 10.1103/physrevd.32.2961] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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47
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Baltrusaitis RM, Becker JJ, Blaylock GT, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dado S, Dorfan DE, Dubois GP, Duncan AL, Einsweiler KF, Eisenstein BI, Fabrizio R, Gladding G, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Lockman WS, Mallik U, Mockett PM, Mozley RF, Nappi A, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig JR, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Sleeman JC, Spadafora AL, Stockdale IE, Thaler JJ, Toki W, Tripsas B, Villa F, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ, Wolf G. tau leptonic branching ratios and a search for Goldstone-boson decay. Phys Rev Lett 1985; 55:1842-1845. [PMID: 10031941 DOI: 10.1103/physrevlett.55.1842] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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48
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Baltrusaitis RM, Becker JJ, Blaylock GT, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Cui H, Dorfan DE, Duncan AL, Einsweiler KF, Eisenstein BI, Fabrizio R, Gladding G, Grancagnolo F, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Mockett PM, Moss L, Mozley RF, Nappi A, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig JR, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Sleeman JC, Spadafora AL, Thaler JJ, Toki W, Unno Y, Villa F, Wattenberg A, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ. Observation of J/ psi radiative decay to pseudoscalar omega omega. Phys Rev Lett 1985; 55:1723-1726. [PMID: 10031906 DOI: 10.1103/physrevlett.55.1723] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Baltrusaitis RM, Coffman D, Hauser J, Hitlin DG, Richman JD, Russell JJ, Schindler RH, Dorfan DE, Fabrizio R, Grancagnolo F, Hamilton RP, Heusch CA, Köpke L, Partridge R, Perrier J, Sadrozinski HF, Scarlatella M, Schalk TL, Seiden A, Weinstein AJ, Becker JJ, Blaylock GT, Brown JS, Cui H, Eisenstein BI, Gladding G, Plaetzer SA, Spadafora AL, Thaler JJ, Wattenberg A, Wisniewski WJ, Bunnell KO, Cassell RE, Coward DH, Einsweiler KF, Moss L, Mozley RF, Odian A, Roehrig JR, Toki W, Unno Y, Villa F, Wermes N, Wisinski D, Burnett TH, Cook V, Duncan AL, Mockett PM, Nappi A, Sleeman JC, Willutzki HJ. Decays of the J/ psi into two pseudoscalar mesons. Phys Rev D Part Fields 1985; 32:566-574. [PMID: 9956177 DOI: 10.1103/physrevd.32.566] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Baltrusaitis RM, Becker JJ, Blaylock GT, Brown JS, Bunnell KO, Burnett TH, Cassell RE, Coffman D, Cook V, Coward DH, Dado S, Dorfan DE, Dubois GP, Duncan AL, Einsweiler KF, Eisenstein BI, Fabrizio R, Gladding G, Hamilton RP, Hauser J, Heusch CA, Hitlin DG, Köpke L, Lockman WS, Mallik U, Mockett PM, Mozley RF, Nappi A, Odian A, Partridge R, Perrier J, Plaetzer SA, Richman JD, Roehrig J, Russell JJ, Sadrozinski HF, Scarlatella M, Schalk TL, Schindler RH, Seiden A, Simopoulos C, Sleeman JC, Spadafora AL, Thaler JJ, Tripsas B, Toki W, Villa F, Wattenberg A, Weinstein AJ, Wermes N, Willutzki HJ, Wisinski D, Wisniewski WJ. Measurements of Cabibbo-suppressed hadronic decays of charmed D+ and D0 mesons. Phys Rev Lett 1985; 55:150-153. [PMID: 10032014 DOI: 10.1103/physrevlett.55.150] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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