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      Modified Oregonator: an Approach from the Complex Networks Theory Translated title: Oregonador Modificado: un Enfoque desde la Teoría de Redes Complejas

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          Abstract

          Abstract: Within the framework of Systems Biology, this paper proposes the complex network theory as a fundamental tool for determining the most critical dynamic variables in complex biochemical mechanisms. The Belousov-Zhabotinsky reaction is proposed as a study model and as a complex bipartite network. By determining the structural property authority, the most relevant dynamic variables are specified, and a mathematical model of the Belousov-Zhabotinsky reaction is obtained. The bidirectional coupling of the proposed model was made with other models associated with biological processes, finding synchronization phenomena when varying the coupling parameter. The time series obtained from the numerical solution of the coupled models were used to construct their images using the Gramian Angular Field technique. In the end, a supervised learning tool is proposed for the classification of the type of coupling by analyzing the images, obtaining score percentages above 94%. The hereby proposed methodology could be extended to the experimental field in order to determine anomalies in the coupling and synchronization of different physiological oscillators.

          Translated abstract

          Resumen: En el marco de la Biología de sistemas, se propone en el presente trabajo a la teoría de redes complejas como una herramienta fundamental para la determinación de las variables dinámicas más importantes en mecanismos bioquímicos complejos. Se emplea como modelo de estudio la reacción de Belousov-Zhabotinsky y se plantea como una red compleja bipartita. Mediante la determinación de la propiedad estructural autoridad, se determinan las variables dinámicas con mayor relevancia y se obtiene un modelo matemático de la reacción de Belousov-Zhabotinsky. Se realizó el acoplamiento bidireccional del modelo planteado con otros modelos asociados a procesos biológicos, encontrándose fenómenos de sincronización al variar el parámetro de acoplamiento. Las series de tiempo obtenidas de la solución numérica de los modelos acoplados se emplearon para construir sus respectivas imágenes mediante la técnica de campo angular gramiano. Finalmente, se propone una herramienta de aprendizaje supervisado para la clasificación del tipo de acoplamiento mediante el análisis de las imágenes, obteniéndose porcentajes de exactitud por encima del 94%. La metodología propuesta en el presente trabajo podría extenderse y trasladarse al campo experimental con la finalidad de determinar anomalías en el acoplamiento y sincronización de distintos osciladores fisiológicos.

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          Most cited references88

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          Statistical mechanics of complex networks

          Reviews of Modern Physics, 74(1), 47-97
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            Thyroid hormone regulation of metabolism.

            Thyroid hormone (TH) is required for normal development as well as regulating metabolism in the adult. The thyroid hormone receptor (TR) isoforms, α and β, are differentially expressed in tissues and have distinct roles in TH signaling. Local activation of thyroxine (T4), to the active form, triiodothyronine (T3), by 5'-deiodinase type 2 (D2) is a key mechanism of TH regulation of metabolism. D2 is expressed in the hypothalamus, white fat, brown adipose tissue (BAT), and skeletal muscle and is required for adaptive thermogenesis. The thyroid gland is regulated by thyrotropin releasing hormone (TRH) and thyroid stimulating hormone (TSH). In addition to TRH/TSH regulation by TH feedback, there is central modulation by nutritional signals, such as leptin, as well as peptides regulating appetite. The nutrient status of the cell provides feedback on TH signaling pathways through epigentic modification of histones. Integration of TH signaling with the adrenergic nervous system occurs peripherally, in liver, white fat, and BAT, but also centrally, in the hypothalamus. TR regulates cholesterol and carbohydrate metabolism through direct actions on gene expression as well as cross-talk with other nuclear receptors, including peroxisome proliferator-activated receptor (PPAR), liver X receptor (LXR), and bile acid signaling pathways. TH modulates hepatic insulin sensitivity, especially important for the suppression of hepatic gluconeogenesis. The role of TH in regulating metabolic pathways has led to several new therapeutic targets for metabolic disorders. Understanding the mechanisms and interactions of the various TH signaling pathways in metabolism will improve our likelihood of identifying effective and selective targets.
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              A systematic review shows no performance benefit of machine learning over logistic regression for clinical prediction models

              The objective of this study was to compare performance of logistic regression (LR) with machine learning (ML) for clinical prediction modeling in the literature.
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                Author and article information

                Journal
                rmib
                Revista mexicana de ingeniería biomédica
                Rev. mex. ing. bioméd
                Sociedad Mexicana de Ingeniería Biomédica (México, Distrito Federal, Mexico )
                0188-9532
                2395-9126
                December 2020
                : 41
                : 3
                : e1034
                Affiliations
                [1] orgnameBenemérita Universidad Autónoma de Puebla Mexico
                Article
                S0188-95322020000300101 S0188-9532(20)04100300101
                10.17488/rmib.41.3.1
                511c3ded-94fd-426f-ab1d-0a839e95bb16

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 11 February 2020
                : 25 June 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 88, Pages: 0
                Product

                SciELO Mexico

                Categories
                Research articles

                Supervised Learning,Gramian Angular Field,Complex Networks,BZ Reaction,Aprendizaje supervisado,Redes Complejas,Reacción BZ,Systems Biology,Campo angular gramiano,Biología de sistemas

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