AI Article Synopsis
Article Abstract
Metabolic networks are among the most widely studied biological systems. The topology and interconnections of metabolic reactions have been well described for many species. This is, however, not sufficient to understand how their activity is regulated in living organisms. These descriptions depict a static set of possible chains of reactions, with no information about the dynamic activity of reaction fluxes. Cyclic structures are thought to play a central role in the homeostasis of biological systems and in their resilience to a changing environment. In this work, we present a methodology to help investigating dynamic fluxes associated to biochemical reactions in metabolic networks. We introduce an algorithm for partitioning fluxes between cyclic and acyclic sub-networks, adapted from an algorithm initially developed to study fluxes in trophic networks. Using this algorithm, we analyse three metabolic systems: the central metabolism of wild type and a deletion mutant of Escherichia coli, erythrocyte metabolism and the central metabolism of the bacterium Methylobacterium extorquens. This methodology unveils the role of cycles in driving and maintaining metabolic fluxes under perturbations in these examples, and may be used to further investigate and understand the organisational invariance of biological systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jtbi.2010.04.026 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exploring the effect and mechanism of action of Jinlida granules (JLD) in the treatment of diabetes-associated cognitive impairment based on network pharmacology with experimental validation.
Ann Med
December 2025
Department of Hebei Provincial Key Laboratory of Basic Medicine for Diabetes, The Shijiazhuang Second Hospital, Shijiazhuang, China.
Objectives: To explore the effect and the probable mechanisms of JLD in the treatment of type 2 diabetes mellitus (T2DM) - associated cognitive impairment (TDACI).
Methods: The effect of JLD in combating TDACI was assessed in T2DM model mice by conducting Morris water maze (MWM) behaviour testing. Active components and their putative targets, as well as TDACI-related targets, were collected from public databases.
Metabolism and immune responses of striped hamsters to ectoparasite challenges: insights from transcriptomic analysis.
Front Immunol
December 2024
National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
Introduction: The striped hamster, often parasitized by ectoparasites in nature, is an ideal model for studying host-ectoparasite molecular interactions. Investigating the response to ectoparasites under laboratory conditions helps elucidate the mechanism of host adaptations to ectoparasite pressure.
Methods: Using transcriptome sequencing, we analyzed gene expression in striped hamsters after short-term (3 days) and long-term (28 days) flea () parasitism.
[Porcine reproductive and respiratory syndrome virus infection induces glycolysis of macrophages to facilitate viral replication].
Sheng Wu Gong Cheng Xue Bao
December 2024
College of Life Science, Longyan University, Longyan 364012, Fujian, China.
This work aims to explore the effect of glycolysis on the replication of porcine reproductive and respiratory syndrome virus (PRRSV) in porcine alveolar macrophages (PAMs). The changes of glucose metabolism, PRRSV protein levels, PRRSV titers, and the relative expression levels of genes and proteins in PAMs were analyzed by ELISA, qPCR, virus titration, and Western blotting after PRRSV infection. The effect of hypoxia-inducible factor-1α (HIF-1α) on PRRSV replication was subsequently assessed by specific siRNAs targeting to HIF-1α.
View Article and Find Full Text PDFThe JNK Signaling Pathway Regulates Seizures Through ENT1 in Pilocarpine-Induced Epilepsy Rat Model.
CNS Neurosci Ther
December 2024
The Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical University, Zunyi, Guizhou, China.
Objective: The study investigates whether the expression and function of ENT1 can be regulated by inhibiting the JNK signaling pathway, thereby altering the levels of extracellular adenosine and glutamate in neurons, and subsequently affecting the progression of epilepsy.
Methods: The adult male SD rats were randomly divided into four groups: EP + SP600125 group, EP + DMSO group, EP group, and normal control group. The expression levels of ENT1, p-JNK, and JNK in the hippocampus of rats from each experimental group were detected using Western blotting technology.
Spraying methyl jasmonate before harvesting can significantly increase the content of icariin in an important leaf medicinal herb, Epimedium sagittatum, by activating the expression of genes involved in flavonoid synthesis pathways.
BMC Plant Biol
December 2024
School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China.
Background: Increased icariin content during the harvesting period is one of the factors limiting the quality improvement of Epimedium sagittatum, and there is currently a lack of scientific and effective biotechnological measures.
Results: In this study, we carried out experiments involving spraying different concentrations (0 µmol·L as control group, 500 µmol·L, 1000 µmol·L and 1500 µmol·L) of methyl jasmonate (MeJA) solution on E. sagittatum leaves.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!