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Tejera E, Carrera I, Jimenes-Vargas K, Armijos-Jaramillo V, Sánchez-Rodríguez A, Cruz-Monteagudo M, Perez-Castillo Y. Cell fishing: A similarity based approach and machine learning strategy for multiple cell lines-compound sensitivity prediction. PLoS One 2019; 14:e0223276. [PMID: 31589649 PMCID: PMC6779297 DOI: 10.1371/journal.pone.0223276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 09/17/2019] [Indexed: 12/21/2022] Open
Abstract
The prediction of cell-lines sensitivity to a given set of compounds is a very important factor in the optimization of in-vitro assays. To date, the most common prediction strategies are based upon machine learning or other quantitative structure-activity relationships (QSAR) based approaches. In the present research, we propose and discuss a straightforward strategy not based on any learning modelling but exclusively relying upon the chemical similarity of a query compound to reference compounds with annotated activity against cell lines. We also compare the performance of the proposed method to machine learning predictions on the same problem. A curated database of compounds-cell lines associations derived from ChemBL version 22 was created for algorithm construction and cross-validation. Validation was done using 10-fold cross-validation and testing the models on new data obtained from ChemBL version 25. In terms of accuracy, both methods perform similarly with values around 0.65 across 750 cell lines in 10-fold cross-validation experiments. By combining both methods it is possible to achieve 66% of correct classification rate in more than 26000 newly reported interactions comprising 11000 new compounds. A Web Service implementing the described approaches (both similarity and machine learning based models) is freely available at: http://bioquimio.udla.edu.ec/cellfishing.
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Affiliation(s)
- E. Tejera
- Ingeniería en Biotecnología, Facultad de Ingeniería y Ciencias Aplicadas, Universidad de Las Américas, Quito, Ecuador
- Grupo de Bio-Quimioinformática, Universidad de Las Américas, Quito, Ecuador
| | - I. Carrera
- Departamento de Informática y Ciencias de la Computación, Escuela Politécnica Nacional, Quito, Ecuador
- Departamento de Ciências de Computadores, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Karina Jimenes-Vargas
- Ingeniería en Biotecnología, Facultad de Ingeniería y Ciencias Aplicadas, Universidad de Las Américas, Quito, Ecuador
| | - V. Armijos-Jaramillo
- Ingeniería en Biotecnología, Facultad de Ingeniería y Ciencias Aplicadas, Universidad de Las Américas, Quito, Ecuador
- Grupo de Bio-Quimioinformática, Universidad de Las Américas, Quito, Ecuador
| | - A. Sánchez-Rodríguez
- Grupo de Bio-Quimioinformática, Universidad de Las Américas, Quito, Ecuador
- Universidad Técnica Particular de Loja, Loja, Ecuador
| | - M. Cruz-Monteagudo
- Center for Computational Science (CCS), University of Miami (UM), Miami, FL, United States of America
- West Coast University, Miami, Florida, United States of America
| | - Y. Perez-Castillo
- Grupo de Bio-Quimioinformática, Universidad de Las Américas, Quito, Ecuador
- Escuela de Ciencias Físicas y Matemáticas, Universidad de Las Américas, Quito, Ecuador
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Burgos G, Ruano M, Badin M, Camargo M, Tejera E, Paz-Y-Miño C. Development of a SNaPshot Multiplex system for the typing of single nucleotide polymorphisms (SNPs) involved in the adaptive response to high altitude hypoxia. Forensic Science International: Genetics Supplement Series 2017. [DOI: 10.1016/j.fsigss.2017.09.111] [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: 10/18/2022]
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Burgos G, Freire-Paspuel B, Restrepo T, Camargo M, Ibarra A, Palacio O, Sánchez ME, Tejera E. Magnetic beads: An alternative method to enzymatic purification for SNaPshot reactions. Forensic Science International: Genetics Supplement Series 2017. [DOI: 10.1016/j.fsigss.2017.09.107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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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Burgos G, Ormasa D, Camargo M, Iturralde G, Granda JD, Posada Y, Sanchez M, Tejera E, Calvopiña M. Assessment of method for buccal swab samples preservation in extreme environmental conditions for population genetics and forensic purposes. Forensic Science International: Genetics Supplement Series 2017. [DOI: 10.1016/j.fsigss.2017.09.178] [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]
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Martins F, Gonçalves R, Oliveira J, Cruz-Monteagudo M, Nieto-Villar JM, Paz-y-Miño C, Rebelo I, Tejera E. Unravelling the relationship between protein sequence and low-complexity regions entropies: Interactome implications. J Theor Biol 2015; 382:320-7. [PMID: 26164061 DOI: 10.1016/j.jtbi.2015.06.049] [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: 03/31/2015] [Revised: 06/12/2015] [Accepted: 06/28/2015] [Indexed: 10/23/2022]
Abstract
Low-complexity regions are sub-sequences of biased composition in a protein sequence. The influence of these regions over protein evolution, specific functions and highly interactive capacities is well known. Although protein sequence entropy has been largely studied, its relationship with low-complexity regions and the subsequent effects on protein function remains unclear. In this work we propose a theoretical and empirical model integrating the sequence entropy with local complexity parameters. Our results indicate that the protein sequence entropy is related with the protein length, the entropies inside and outside the low-complexity regions as well as their number and average size. We found a small but significant increment in the sequence entropy of hubs proteins. In agreement with our theoretical model, this increment is highly dependent of the balance between the increment of protein length and average size of the low-complexity regions. Finally, our models and proteins analysis provide evidence supporting that modifications in the average size is more relevant in hubs proteins than changes in the number of low-complexity regions.
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Affiliation(s)
- F Martins
- Department of Biochemistry, Faculty of Pharmacy, University of Porto, Portugal
| | - R Gonçalves
- Department of Biochemistry, Faculty of Pharmacy, University of Porto, Portugal
| | - J Oliveira
- Department of Biochemistry, Faculty of Pharmacy, University of Porto, Portugal
| | - M Cruz-Monteagudo
- Instituto de Investigaciones Biomédicas, Universidad de las Américas, Quito, Ecuador
| | - J M Nieto-Villar
- Dpto. de Química-Física, Fac. de Química, Universidad de La Habana, Cuba. Cátedra de Sistemas Complejos "H. Poincaré", Universidad de La Habana, Cuba
| | - C Paz-y-Miño
- Instituto de Investigaciones Biomédicas, Universidad de las Américas, Quito, Ecuador
| | - I Rebelo
- Department of Biochemistry, Faculty of Pharmacy, University of Porto, Portugal; UCIBIO@REQUIMTE, Portugal.
| | - E Tejera
- Instituto de Investigaciones Biomédicas, Universidad de las Américas, Quito, Ecuador
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Tejera E, Bernardes J, Rebelo I. P5. Bioinformatic analysis of protein–protein interaction network in preeclampsia. Pregnancy Hypertens 2011; 1:275. [DOI: 10.1016/j.preghy.2011.08.066] [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: 11/26/2022]
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Santos R, Freitas J, Tejera E, Monteiro A, Lima J, Rebelo I. EFFECT OF LIFE STYLE MODIFICATION IN MENOPAUSAL WOMEN WITH OBESITY, HYPERTENSION, AUTONOMIC AND ENDOTHELIAL DYSFUNCTION. J Hypertens 2011. [DOI: 10.1097/00004872-201106001-00416] [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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Machado A, Tejera E, Cruz-Monteagudo M, Rebelo I. Application of desirability-based multi(bi)-objective optimization in the design of selective arylpiperazine derivates for the 5-HT1A serotonin receptor. Eur J Med Chem 2009; 44:5045-54. [DOI: 10.1016/j.ejmech.2009.09.008] [Citation(s) in RCA: 11] [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] [Received: 01/29/2009] [Revised: 07/06/2009] [Accepted: 09/06/2009] [Indexed: 10/20/2022]
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Tejera E, Plain A, Portelinha A, Caceres JLH, Rebelo I, Nieto-Villar JM. Heart Rate Variability Complexity in the Aging Process. Computational and Mathematical Methods in Medicine 2007. [DOI: 10.1080/17486700701776413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
In the present work, we propose a discrete model to the characterization of heart rate variability (HRV) complexity in the aging process of healthy subjects. We apply the Shannon entropy on the basis of an alternative way to probability calculation and to define a new index taking into consideration the transition probability that is related to the physiological complexity of the system. Our results suggest that in the aging process the capability response decreases according to the reduction of the physiological complexity. In the oldest group, an alternative mechanism emerges to compensate for this lack of capability; however, this effect does not increase the physiological complexity. Concomitantly, we provide some physiological explanation for our results.
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Affiliation(s)
- E. Tejera
- Departamento de Química-Física, Faculdade de Química, Universidad de La Habana, Cuba
| | - A. Plain
- Faculdade de Biología, Universidad de La Habana, Cuba
| | | | | | - I. Rebelo
- Faculdade de Farmácia/IBMC, Universidade do Porto, Portugal
| | - J. M. Nieto-Villar
- Departamento de Química-Física, Faculdade de Química, Universidad de La Habana, Cuba
- Cátedra de Sistemas Complejos “H. Poincaré”, Universidad de La Habana, Cuba
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Zimmerman SB, Schwartz CD, Monaghan RL, Pelak BA, Weissberger B, Gilfillan EC, Mochales S, Hernandez S, Currie SA, Tejera E. Difficidin and oxydifficidin: novel broad spectrum antibacterial antibiotics produced by Bacillus subtilis. I. Production, taxonomy and antibacterial activity. J Antibiot (Tokyo) 1987; 40:1677-81. [PMID: 3123448 DOI: 10.7164/antibiotics.40.1677] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [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: 01/04/2023]
Abstract
Difficidin and oxydifficidin, two novel macrocyclic polyene lactone phosphate esters were discovered in fermentation broths of each of two strains of Bacillus subtilis: ATCC 39320 and ATCC 39374. Difficidin and oxydifficidin each showed a broad spectrum of activity against aerobic and anaerobic bacteria. Many of the susceptible aerobes and anaerobes were human pathogens resistant to one or more antibiotics. Difficidin and oxydifficidin when administered intraperitoneally protected mice against an otherwise lethal bacteremia caused by Klebsiella pneumoniae (ED50 in mg/kg of 1.31 and 15.6 respectively). Neither difficidin nor oxydifficidin were effective when administered via the subcutaneous route.
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Affiliation(s)
- S B Zimmerman
- Merck Sharp and Dohme Research Laboratories, Rahway, New Jersey
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