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Kappatou CD, Odgers J, García-Muñoz S, Misener R. An Optimization Approach Coupling Preprocessing with Model Regression for Enhanced Chemometrics. Ind Eng Chem Res 2023; 62:6196-6213. [PMID: 37097815 PMCID: PMC10119938 DOI: 10.1021/acs.iecr.2c04583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/02/2023] [Accepted: 03/27/2023] [Indexed: 04/09/2023]
Abstract
Chemometric methods are broadly used in the chemical and biochemical sectors. Typically, derivation of a regression model follows data preprocessing in a sequential manner. Yet, preprocessing can significantly influence the regression model and eventually its predictive ability. In this work, we investigate the coupling of preprocessing and model parameter estimation by incorporating them simultaneously in an optimization step. Common model selection techniques rely almost exclusively on the performance of some accuracy metric, yet having a quantitative metric for model robustness can prolong model up-time. Our approach is applied to optimize for model accuracy and robustness. This requires the introduction of a novel mathematical definition for robustness. We test our method in a simulated set up and with industrial case studies from multivariate calibration. The results highlight the importance of both accuracy and robustness properties and illustrate the potential of the proposed optimization approach toward automating the generation of efficient chemometric models.
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Affiliation(s)
- Chrysoula D. Kappatou
- Computational Optimisation Group, Department of Computing, Imperial College London, London SW7 2AZ, United Kingdom
| | - James Odgers
- Computational Optimisation Group, Department of Computing, Imperial College London, London SW7 2AZ, United Kingdom
| | - Salvador García-Muñoz
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, Indiana 46285, United States
| | - Ruth Misener
- Computational Optimisation Group, Department of Computing, Imperial College London, London SW7 2AZ, United Kingdom
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2
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Talens C, Ibargüen M, Murgui X, García-Muñoz S, Peral I. Texture‐modified meat for senior consumers varying meat type and mincing speed: effect of gender, age and nutritional information on sensory perception and preferences. Future Foods 2022. [DOI: 10.1016/j.fufo.2022.100180] [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: 10/14/2022] Open
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3
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Zhao F, Paz Ochoa M, Grossmann IE, García-Muñoz S, Stamatis SD. Novel formulations of flexibility index and design centering for design space definition. Comput Chem Eng 2022. [DOI: 10.1016/j.compchemeng.2022.107969] [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]
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4
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García-Muñoz S, Barlińska J, Wojtkowska K, Da Quinta N, Baranda A, Alfaro B, Santa Cruz E. Is it possible to improve healthy food habits in schoolchildren? A cross cultural study among Spain and Poland. Food Qual Prefer 2022. [DOI: 10.1016/j.foodqual.2022.104534] [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: 11/16/2022]
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5
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Johnson BJ, Sen M, Hanson J, García-Muñoz S, Sahinidis NV. Stochastic analysis and modeling of pharmaceutical screw feeder mass flow rates. Int J Pharm 2022; 621:121776. [DOI: 10.1016/j.ijpharm.2022.121776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 04/16/2022] [Accepted: 04/24/2022] [Indexed: 11/27/2022]
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6
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Ochoa M, García-Muñoz S, Stamatis S, Grossmann I. Novel flexibility index formulations for the selection of the operating range within a design space. Comput Chem Eng 2021. [DOI: 10.1016/j.compchemeng.2021.107284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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7
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Sen M, Arguelles AJ, Stamatis SD, García-Muñoz S, Kolis S. An optimization-based model discrimination framework for selecting an appropriate reaction kinetic model structure during early phase pharmaceutical process development. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00222h] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A model discrimination workflow to develop fit for purpose kinetic models of new pharmaceutical compounds in early stages of drug development involving complex reaction networks with limited prior information and provision to run new experiments.
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Affiliation(s)
- Maitraye Sen
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, USA
| | - Alonso J. Arguelles
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, USA
| | - Stephen D. Stamatis
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, USA
| | - Salvador García-Muñoz
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, USA
| | - Stanley Kolis
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, USA
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8
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Kucherenko S, Giamalakis D, Shah N, García-Muñoz S. Computationally efficient identification of probabilistic design spaces through application of metamodeling and adaptive sampling. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2019.106608] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Christodoulou C, Sorensen E, García-Muñoz S, Mazzei L. Mathematical Modeling of Spray Impingement and Film Formation on Pharmaceutical Tablets during Coating. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2019.11.029] [Citation(s) in RCA: 3] [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] [Indexed: 11/26/2022]
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10
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Borhani TN, García-Muñoz S, Vanesa Luciani C, Galindo A, Adjiman CS. Hybrid QSPR models for the prediction of the free energy of solvation of organic solute/solvent pairs. Phys Chem Chem Phys 2019; 21:13706-13720. [PMID: 31204418 DOI: 10.1039/c8cp07562j] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to the importance of the Gibbs free energy of solvation in understanding many physicochemical phenomena, including lipophilicity, phase equilibria and liquid-phase reaction equilibrium and kinetics, there is a need for predictive models that can be applied across large sets of solvents and solutes. In this paper, we propose two quantitative structure property relationships (QSPRs) to predict the Gibbs free energy of solvation, developed using partial least squares (PLS) and multivariate linear regression (MLR) methods for 295 solutes in 210 solvents with total number of data points of 1777. Unlike other QSPR models, the proposed models are not restricted to a specific solvent or solute. Furthermore, while most QSPR models include either experimental or quantum mechanical descriptors, the proposed models combine both, using experimental descriptors to represent the solvent and quantum mechanical descriptors to represent the solute. Up to twelve experimental descriptors and nine quantum mechanical descriptors are considered in the proposed models. Extensive internal and external validation is undertaken to assess model accuracy in predicting the Gibbs free energy of solvation for a large number of solute/solvent pairs. The best MLR model, which includes three solute descriptors and two solvent properties, yields a coefficient of determination (R2) of 0.88 and a root mean squared error (RMSE) of 0.59 kcal mol-1 for the training set. The best PLS model includes six latent variables, and has an R2 value of 0.91 and a RMSE of 0.52 kcal mol-1. The proposed models are compared to selected results based on continuum solvation quantum chemistry calculations. They enable the fast prediction of the Gibbs free energy of solvation of a wide range of solutes in different solvents.
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Affiliation(s)
- Tohid N Borhani
- Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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11
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Chen Q, Paulavičius R, Adjiman CS, García-Muñoz S. An optimization framework to combine operable space maximization with design of experiments. AIChE J 2018. [DOI: 10.1002/aic.16214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qi Chen
- Dept. of Chemical Engineering, Centre for Process Systems Engineering; Imperial College London, South Kensington Campus; London SW7 2AZ U.K
| | - Remigijus Paulavičius
- Dept. of Chemical Engineering, Centre for Process Systems Engineering; Imperial College London, South Kensington Campus; London SW7 2AZ U.K
| | - Claire S. Adjiman
- Dept. of Chemical Engineering, Centre for Process Systems Engineering; Imperial College London, South Kensington Campus; London SW7 2AZ U.K
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12
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Christodoulou C, Sorensen E, García-Muñoz S, Mazzei L. Mathematical modelling of water absorption and evaporation in a pharmaceutical tablet during film coating. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.09.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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García-Muñoz S, Butterbaugh A, Leavesley I, Manley LF, Slade D, Bermingham S. A flowsheet model for the development of a continuous process for pharmaceutical tablets: An industrial perspective. AIChE J 2017. [DOI: 10.1002/aic.15967] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - David Slade
- Process Systems Enterprise Ltd; 26-28 Hammersmith Grove, London W6 7HA U.K
| | - Sean Bermingham
- Process Systems Enterprise Ltd; 26-28 Hammersmith Grove, London W6 7HA U.K
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Fernández-Ginés FD, García-Muñoz S, Rodriguez-Cuadros TB, Alférez-García I. PP-006 A novel halogenated anaesthetic solution: Physical and chemical stability study. Eur J Hosp Pharm 2016. [DOI: 10.1136/ejhpharm-2016-000875.445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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García-Muñoz S, Luciani CV, Vaidyaraman S, Seibert KD. Definition of Design Spaces Using Mechanistic Models and Geometric Projections of Probability Maps. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00158] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Salvador García-Muñoz
- Small Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, United States
| | - Carla V. Luciani
- Small Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, United States
| | - Shankar Vaidyaraman
- Small Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, United States
| | - Kevin D. Seibert
- Small Molecule Design and Development, Lilly Research Laboratories, Eli Lilly & Company, 1400 West Raymond Street, Indianapolis, Indiana 46221, United States
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17
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Ottavian M, Barolo M, García-Muñoz S. Maintenance of Machine Vision Systems for Product Quality Assessment. Part II. Addressing Camera Replacement. Ind Eng Chem Res 2014. [DOI: 10.1021/ie402910z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matteo Ottavian
- CAPE-Lab
− Computer-Aided Process Engineering Laboratory, Department
of Industrial Engineering University of Padova, via Marzolo 9 −
35131 Padova PD, Italy
| | - Massimiliano Barolo
- CAPE-Lab
− Computer-Aided Process Engineering Laboratory, Department
of Industrial Engineering University of Padova, via Marzolo 9 −
35131 Padova PD, Italy
| | - Salvador García-Muñoz
- Pfizer Worldwide Research & Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
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19
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Tomba E, Facco P, Bezzo F, García-Muñoz S. Exploiting Historical Databases to Design the Target Quality Profile for a New Product. Ind Eng Chem Res 2013. [DOI: 10.1021/ie3032839] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emanuele Tomba
- CAPE-Lab—Computer-Aided
Process Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9, 35131 Padova
PD, Italy
| | - Pierantonio Facco
- CAPE-Lab—Computer-Aided
Process Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9, 35131 Padova
PD, Italy
| | - Fabrizio Bezzo
- CAPE-Lab—Computer-Aided
Process Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9, 35131 Padova
PD, Italy
| | - Salvador García-Muñoz
- Pfizer Worldwide R&D, 445 Eastern Point Road, Groton, Connecticut 06340, United States
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20
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García-Muñoz S, Sangrador-Pelluz C, Albert-Mari A, Soler-Company E, Olivares-Pallerols R, Monzó-Rausell M. DGI-051 Oral Antineoplastic Treatment Adherence. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.317] [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: 11/04/2022] Open
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21
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Ottavian M, Barolo M, García-Muñoz S. Maintenance of Machine Vision Systems for Product Quality Assessment. Part I. Addressing Changes in Lighting Conditions. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303295t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matteo Ottavian
- CAPE-Lab − Computer-Aided
Process Engineering Laboratory, Department of Industrial Engineering, University of Padova, via Marzolo, 9 −
35131 Padova PD, Italy
| | - Massimiliano Barolo
- CAPE-Lab − Computer-Aided
Process Engineering Laboratory, Department of Industrial Engineering, University of Padova, via Marzolo, 9 −
35131 Padova PD, Italy
| | - Salvador García-Muñoz
- Pfizer Worldwide Research & Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
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22
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Tomba E, Barolo M, García-Muñoz S. General Framework for Latent Variable Model Inversion for the Design and Manufacturing of New Products. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301214c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emanuele Tomba
- Computer-Aided Process Engineering
Laboratory (CAPE-Lab), Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9, 35131 Padova
PD, Italy
| | - Massimiliano Barolo
- Computer-Aided Process Engineering
Laboratory (CAPE-Lab), Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9, 35131 Padova
PD, Italy
| | - Salvador García-Muñoz
- Pfizer Worldwide R&D, 445 Eastern Point Road, Groton, Connecticut 06340, United States
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23
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Facco P, Tomba E, Bezzo F, García-Muñoz S, Barolo M. Transfer of Process Monitoring Models between Different Plants Using Latent Variable Techniques. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202974u] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pierantonio Facco
- CAPE-Lab,
Computer-Aided Process
Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9 − 35131 Padova PD, Italy
| | - Emanuele Tomba
- CAPE-Lab,
Computer-Aided Process
Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9 − 35131 Padova PD, Italy
| | - Fabrizio Bezzo
- CAPE-Lab,
Computer-Aided Process
Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9 − 35131 Padova PD, Italy
| | - Salvador García-Muñoz
- Pfizer Worldwide R&D, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Massimiliano Barolo
- CAPE-Lab,
Computer-Aided Process
Engineering Laboratory, Dipartimento di Ingegneria Industriale, Università di Padova, via Marzolo 9 − 35131 Padova PD, Italy
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Polizzi MA, García-Muñoz S. A framework for in-silico formulation design using multivariate latent variable regression methods. Int J Pharm 2011; 418:235-42. [DOI: 10.1016/j.ijpharm.2011.04.064] [Citation(s) in RCA: 19] [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: 11/10/2010] [Revised: 04/01/2011] [Accepted: 04/26/2011] [Indexed: 11/27/2022]
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García-Muñoz S, Carmody A. Multivariate wavelet texture analysis for pharmaceutical solid product characterization. Int J Pharm 2010; 398:97-106. [PMID: 20667507 DOI: 10.1016/j.ijpharm.2010.07.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 07/12/2010] [Accepted: 07/19/2010] [Indexed: 11/28/2022]
Abstract
The application of multivariate wavelet texture analysis (MWTA) is presented and discussed as it is applied to three different types of pharmaceutical materials: (a) tablet cores, (b) wet granules and (c) controlled release tablets. The application of MWTA is initially proposed as a quantitative replacement to the human visual judgment of the textural appearance of the different materials. In all cases, the metrics obtained with MWTA agree with visual assessment on the progression of textural features such as erosion and surface roughness. This work further demonstrates that MWTA also represents a useful tool to increase the understanding of the manufacturing process, as it provides diagnostics to relate process parameters with textural features of the material that are difficult or costly to measure otherwise (such as granule size for wet material or surface appearance for a controlled release product). MWTA is also presented as a potential tool for real-time release for those cases where the textural features can be proven to provide accurate enough predictions of the final product performance; as shown here with the obtained prediction of dissolution from the controlled release tablet using the texture of the product as an input.
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García-Muñoz S, Dolph S, Ward HW. Handling uncertainty in the establishment of a design space for the manufacture of a pharmaceutical product. Comput Chem Eng 2010. [DOI: 10.1016/j.compchemeng.2010.02.027] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Franco-Donat M, Soler-Company E, Valverde-Mordt C, García-Muñoz S, Rocher-Milla A, Sangüesa-Nebot M. Medication reconciliation at hospital admission and discharge in an orthopedic surgery and traumatology department. Rev Esp Cir Ortop Traumatol (Engl Ed) 2010. [DOI: 10.1016/s1988-8856(10)70224-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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García-Muñoz S, MacGregor JF, Neogi D, Latshaw BE, Mehta S. Optimization of Batch Operating Policies. Part II. Incorporating Process Constraints and Industrial Applications. Ind Eng Chem Res 2008. [DOI: 10.1021/ie071437j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salvador García-Muñoz
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7 Canada, and Air Products and Chemicals, 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195
| | - John F. MacGregor
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7 Canada, and Air Products and Chemicals, 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195
| | - Debashis Neogi
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7 Canada, and Air Products and Chemicals, 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195
| | - Bruce E. Latshaw
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7 Canada, and Air Products and Chemicals, 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195
| | - Sanjay Mehta
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7 Canada, and Air Products and Chemicals, 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195
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García-Muñoz S, Kourti T, MacGregor JF, Apruzzese F, Champagne M. Optimization of Batch Operating Policies. Part I. Handling Multiple Solutions#. Ind Eng Chem Res 2006. [DOI: 10.1021/ie060314g] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Salvador García-Muñoz
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada, and Tembec, 33 Kipawa Road, Témiscaming, QC J0Z 3R0, Canada
| | - Theodora Kourti
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada, and Tembec, 33 Kipawa Road, Témiscaming, QC J0Z 3R0, Canada
| | - John F. MacGregor
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada, and Tembec, 33 Kipawa Road, Témiscaming, QC J0Z 3R0, Canada
| | - Francesca Apruzzese
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada, and Tembec, 33 Kipawa Road, Témiscaming, QC J0Z 3R0, Canada
| | - Marc Champagne
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada, and Tembec, 33 Kipawa Road, Témiscaming, QC J0Z 3R0, Canada
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Affiliation(s)
- Salvador García-Muñoz
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
| | - Theodora Kourti
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
| | - John F. MacGregor
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
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García-Muñoz S, Kourti T, MacGregor JF, Mateos AG, Murphy G. Troubleshooting of an Industrial Batch Process Using Multivariate Methods. Ind Eng Chem Res 2003. [DOI: 10.1021/ie0300023] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cruz-Velarde JA, Garzo C, García-Muñoz S, Gil R, Muñoz L. [Clinical and prognostic heterogeneity in Aicardi's syndrome: a description of two cases]. Rev Neurol 1999; 28:784-5. [PMID: 10363323] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
INTRODUCTION Aicardi's syndrome is characterized by infantile spasms, agenesis of the corpus callosum and ocular lesions. Clinically it presents as severe mental retardation, severe limitation of motor development and of language, with a prognosis of survival for only a few months or years. We present two new cases of this uncommon syndrome and describe the heterogeneity of its clinical and prognostic severity. CLINICAL CASES Case 1. A ten-month old patient had flexion spasms of the limbs at the age of 4 months, bilateral corioretinal lesions and generalized hypoplasia of the corpus callosum. During the clinical course of the disorder, the epileptic crises were controlled, there was mental retardation, the head was held steady and the baby could sit. Case 2. A nine year old patient had had flexion spasms when aged 2 months, had bilateral retinal lesions and generalized hypoplasia of the corpus callosum. During his clinical course the epileptic crises were controlled, there was severe mental retardation, the patient could pay attention and collaborate, articulate single words, walk on his own and manipulate objects. CONCLUSION Aicardi's syndrome should be considered to be a syndrome in which the clinical findings and prognosis are heterogeneous, as seen from new cases with less clinical and functional limitation than the patients first described.
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Affiliation(s)
- J A Cruz-Velarde
- Servicio de Neurología, Hospital Universitario Gregorio Marañón, Madrid, España
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González-Manchón C, Fernández-Pinel M, Arias-Salgado EG, Ferrer M, Alvarez MV, García-Muñoz S, Ayuso MS, Parrilla R. Molecular genetic analysis of a compound heterozygote for the glycoprotein (GP) IIb gene associated with Glanzmann's thrombasthenia: disruption of the 674-687 disulfide bridge in GPIIb prevents surface exposure of GPIIb-IIIa complexes. Blood 1999; 93:866-75. [PMID: 9920835] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
This work was aimed at elucidating the molecular genetic lesion(s) responsible for the thrombasthenic phenotype of a patient whose low platelet content of glycoprotein (GP) IIb-IIIa indicated that it was a case of type II Glanzmann's thrombasthenia (GT). The parents did not admit consanguinity and showed a reduced platelet content of GPIIb-IIIa. Polymerase chain reaction (PCR)-single-stranded conformational polymorphism analysis of genomic DNA showed no mutations in the patient's GPIIIa and two novel mutations in the GPIIb gene: one of them was a heterozygous splice junction mutation, a C-->A transversion, at position +2 of the exon 5-intron 5 boundary [IVS5(+2)C-->A] inherited from the father. The predicted effect of this mutation, insertion of intron 5 (76 bp) into the GPIIb-mRNA, was confirmed by reverse transcription-PCR analysis of platelet mRNA. The almost complete absence of this mutated form of GPIIb-mRNA suggests that it is very unstable. Virtually all of the proband's GPIIb-mRNA was accounted for by the allele inherited from the mother showing a T2113-->C transition that changes Cys674-->Arg674 disrupting the 674-687 intramolecular disulfide bridge. The proband showed a platelet accumulation of proGPIIb and minute amounts of GPIIb and GPIIIa. Moreover, transfection and immunoprecipitation analysis demonstrated that [Arg674]GPIIb is capable of forming a heterodimer complex with GPIIIa, but the rate of subunit maturation and the surface exposure of GPIIb-IIIa are strongly reduced. Thus, the intramolecular 674-687 disulfide bridge in GPIIb is essential for the normal processing of GPIIb-IIIa complexes. The additive effect of these two GPIIb mutations provides the molecular basis for the thrombasthenic phenotype of the proband.
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Affiliation(s)
- C González-Manchón
- Department of Pathophysiology and Human Molecular Genetics, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
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