Network topology

  • Article
    | Open Access

    Although spontaneous brain activity is complex and clinically relevant, it is still unclear whether transitions in resting brain activity follow an underlying arrangement or whether they are unpredictable. In this work, the authors revealed a transition state of the brain that acts like a switch between states and forms the basis for the continuous evolution of brain activity patterns at rest.

    • Manish Saggar
    • , James M. Shine
    •  & Damien Fair
  • Article
    | Open Access

    Exercise and diet interventions are treatments for nonalcoholic fatty liver disease (NAFLD). Here the authors report that in randomized, controlled trial in patients with NAFLD exercise and diet intervention were associated with diversified gut microbiome keystone taxa. Exploratory analysis suggests gut microbial network may be used to predict the individual liver fat response to exercise intervention, if validated in future studies.

    • Runtan Cheng
    • , Lu Wang
    •  & Sulin Cheng
  • Article
    | Open Access

    Classifying cells into unseen cell types remains challenging in scRNA-seq analysis. Here we show that Cell Ontology enables an accurate classification of unseen cell types through considering the cell type relationships in the Cell Ontology graph.

    • Sheng Wang
    • , Angela Oliveira Pisco
    •  & Russ B. Altman
  • Article
    | Open Access

    A more comprehensive map of viral host ranges can help identify and mitigate zoonotic and animal-disease risks. A divide-and-conquer approach which separates viral, mammalian and network features predicts over 20,000 unknown associations between known viruses and susceptible mammalian species.

    • Maya Wardeh
    • , Marcus S. C. Blagrove
    •  & Matthew Baylis
  • Article
    | Open Access

    Data-rich networks can be difficult to interpret beyond a certain size. Here, the authors introduce a platform that uses virtual reality to allow the visual exploration of large networks, while interfacing with data repositories and other analytical methods to improve the interpretation of big data.

    • Sebastian Pirch
    • , Felix Müller
    •  & Jörg Menche
  • Article
    | Open Access

    Most diseases disrupt multiple proteins, and drugs treat such diseases by restoring the functions of the disrupted proteins; how drugs restore these functions, however, is often unknown. Here, the authors develop the multiscale interactome, a powerful approach to explain disease treatment.

    • Camilo Ruiz
    • , Marinka Zitnik
    •  & Jure Leskovec
  • Article
    | Open Access

    Human mobility plays a central role in the spread of infectious diseases and can help in forecasting incidence. Here the authors show a comparison of multiple mobility benchmarks in forecasting influenza, and demonstrate the value of a machine-learned mobility map with global coverage at multiple spatial scales.

    • Srinivasan Venkatramanan
    • , Adam Sadilek
    •  & Madhav Marathe
  • Article
    | Open Access

    Understanding patient-specific pathobiological pathways is a critical step for advancing precision medicine. Here the authors show that individualized protein-protein interaction networks provide key insight on patient-level pathobiology and clinically relevant pathophenotypic characteristics in a complex disease.

    • Bradley A. Maron
    • , Rui-Sheng Wang
    •  & Joseph Loscalzo
  • Article
    | Open Access

    Mechanical strength of in situ assembled nuclear lamin filaments arranged in a 3D meshwork is unclear. Here, using mechanical, structural and simulation tools, the authors report the hierarchical organization of the lamin meshwork that imparts strength and toughness to lamin filaments at par with silk and Kevlar®

    • K. Tanuj Sapra
    • , Zhao Qin
    •  & Ohad Medalia
  • Article
    | Open Access

    Here, the authors develop a genome evolution model to investigate the origin of functional redundancy in the human microbiome by analyzing its genomic content network and illustrate potential ecological and evolutionary processes that may contribute to its resilience.

    • Liang Tian
    • , Xu-Wen Wang
    •  & Yang-Yu Liu
  • Article
    | Open Access

    Nested and modular patterns are vastly observed in mutualistic networks across genres and geographic conditions. Here, the authors show a unified mechanism that underlies the assembly and evolution of such networks, based on adaptive niche interactions of the participants.

    • Weiran Cai
    • , Jordan Snyder
    •  & Raissa M. D’Souza
  • Article
    | Open Access

    The computational prediction of protein allostery can guide experimental studies of protein function and cellular activity. Here, the authors develop a network-based method to detect allosteric coupling within proteins solely based on their structures, and set up a webserver for allostery prediction.

    • Jian Wang
    • , Abha Jain
    •  & Nikolay V. Dokholyan
  • Article
    | Open Access

    Information developed to understand the molecular mechanisms of SARS-CoV-2 infection for predicting drug repurposing candidates is time-consuming to integrate and explore. Here, the authors develop an interactive online platform for virus-host interactome exploration and drug (target) identification.

    • Sepideh Sadegh
    • , Julian Matschinske
    •  & Jan Baumbach
  • Article
    | Open Access

    It is crucial yet challenging to identify cause-consequence relation in complex dynamical systems where direct causal links can mix with indirect ones. Leng et al. propose a data-driven model-independent method to distinguish direct from indirect causality and test its applicability to real-world data.

    • Siyang Leng
    • , Huanfei Ma
    •  & Luonan Chen
  • Article
    | Open Access

    Complex diseases often share genetic determinants and symptoms, but the mechanistic basis of disease interactions remains elusive. Here, the authors propose a network topological measure to identify proteins linking complex diseases in the interactome, and identify mediators between COPD and asthma.

    • Enrico Maiorino
    • , Seung Han Baek
    •  & Amitabh Sharma
  • Article
    | Open Access

    Our understanding of the mechanisms of drug interactions remains limited. Here the authors introduce a framework to study how complex cellular perturbations induced by different drugs affect each other in morphological feature space.

    • Michael Caldera
    • , Felix Müller
    •  & Jörg Menche
  • Article
    | Open Access

    KRASG12V and BRAFV600E are oncogenic mutations that activate ERK signalling. Here, the authors use single cell analysis in intestinal organoids and show that BRAFV600E activates ERK in all intestinal cell types, while KRASG12V induces ERK activation in only a subset of cells, depending on cell differentiation state.

    • Raphael Brandt
    • , Thomas Sell
    •  & Markus Morkel
  • Article
    | Open Access

    Combination therapy holds great promise, but discovery remains challenging. Here, the authors propose a method to identify efficacious drug combinations for specific diseases, and find that successful combinations tend to target separate neighbourhoods of the disease module in the human interactome.

    • Feixiong Cheng
    • , István A. Kovács
    •  & Albert-László Barabási
  • Article
    | Open Access

    Inferring direct protein−protein interactions (PPIs) and modules in PPI networks remains a challenge. Here, the authors introduce an algorithm to infer potential direct PPIs from quantitative proteomic AP-MS data by identifying enriched interactions of each bait relative to the other baits.

    • Mihaela E. Sardiu
    • , Joshua M. Gilmore
    •  & Michael P. Washburn
  • Article
    | Open Access

    Real-world networks are often said to be ”scale free”, meaning their degree distribution follows a power law. Broido and Clauset perform statistical tests of this claim using a large and diverse corpus of real-world networks, showing that scale-free structure is far from universal.

    • Anna D. Broido
    •  & Aaron Clauset
  • Article
    | Open Access

    Complex networks can be a useful tool to investigate problems in social science. Here the authors use game theory to establish a network model and then use a machine learning approach to characterize the role of nodes within a social network.

    • Yuan Yuan
    • , Ahmad Alabdulkareem
    •  & Alex ‘Sandy’ Pentland
  • Article
    | Open Access

    Tumours of different tissues can show similarities in genomic alterations. Here, the authors combine tumour transcriptome and protein interaction data in a network-based analysis of 11 tumours types, and identify clusters of tumours with specific signatures for multi-tumour drug targeting and survival prognosis.

    • Ítalo Faria do Valle
    • , Giulia Menichetti
    •  & Daniel Remondini
  • Article
    | Open Access

    Technical noise in experiments is unavoidable, but it introduces inaccuracies into the biological networks we infer from the data. Here, the authors introduce a diffusion-based method for denoising undirected, weighted networks, and show that it improves the performances of downstream analyses.

    • Bo Wang
    • , Armin Pourshafeie
    •  & Jure Leskovec
  • Article
    | Open Access

    Community detection allows one to decompose a network into its building blocks. While communities can be identified with a variety of methods, their relative importance can’t be easily derived. Here the authors introduce an algorithm to identify modules which are most promising for further analysis.

    • Marinka Zitnik
    • , Rok Sosič
    •  & Jure Leskovec
  • Article
    | Open Access

    Network dynamical systems can represent the interactions involved in the collective dynamics of gene regulatory networks or metabolic circuits. Here Casadiego et al. present a method for inferring these types of interactions directly from observed time series without relying on their model.

    • Jose Casadiego
    • , Mor Nitzan
    •  & Marc Timme
  • Article
    | Open Access

    Cancer is caused by accumulating genetic mutations. Here, the authors investigate the cooperative effect of these mutations in colorectal cancer patients and identify a giant cluster of mutation-propagating modules that undergoes percolation transition during tumorigenesis.

    • Dongkwan Shin
    • , Jonghoon Lee
    •  & Kwang-Hyun Cho
  • Article
    | Open Access

    Network-based data integration for drug–target prediction is a promising avenue for drug repositioning, but performance is wanting. Here, the authors introduce DTINet, whose performance is enhanced in the face of noisy, incomplete and high-dimensional biological data by learning low-dimensional vector representations.

    • Yunan Luo
    • , Xinbin Zhao
    •  & Jianyang Zeng
  • Article
    | Open Access

    Although networks of interacting genes and metabolic reactions are interdependent, they have largely been treated as separate systems. Here the authors apply a statistical framework for interdependent networks to E. coli, and show that it is sensitive to gene and protein perturbations but robust against metabolic changes.

    • David F. Klosik
    • , Anne Grimbs
    •  & Marc-Thorsten Hütt
  • Article
    | Open Access

    Some argue that health-related behaviours, such as obesity, are contagious, but empirical evidence of health contagion remains inconclusive. Here, using a large scale quasi-experiment in a global network of runners, Aral and Nicolaides show that this type of contagion exists in fitness behaviours.

    • Sinan Aral
    •  & Christos Nicolaides
  • Article
    | Open Access

    The target of rapamycin (Tor) is a Ser/Thr protein kinase that regulates a wide range of anabolic and catabolic processes. Here the authors describe a sub-nanometer cryo-EM structure of a yeast Tor–Lst8 complex and propose an overall topology that differs from that previously suggested for mTORC1.

    • Domagoj Baretić
    • , Alex Berndt
    •  & Roger L. Williams
  • Article |

    Humans are a network of complex physiological systems, but quantifying these diverse systems is a challenge. This study presents a method to show that each physiological state is characterized by a specific network structure, demonstrating a connection between network topology and function.

    • Amir Bashan
    • , Ronny P. Bartsch
    •  & Plamen Ch. Ivanov