Welcome to the website of the LINK-Group!
The LINK-Group was formed in 2004 by researchers and research students from different fields and different universities to discover the topology and dynamics of networks from amino acids to social networks. The group is a multidisciplinary group requiring and offering a multidimensional understanding of complex systems. We use the network approach to judge the importance of our findings by their transferability to another level of complexity (i.e. from proteins to society or vice versa). Moreover, we use networks as "highways" between remote areas of science resolving creativity-deadlocks by allowing the re-formulation of the original questions at a different field and thereby promoting the creative associations by its different conceptual context. The LINK-Group develops novel algorithms to analyze network topology and dynamics and uses them to characterize the adaptation of complex systems to novel environments, and to identify new drug targets. If you want to join us, send your message by clicking here.
Our ComPPI NAR Database paper became a highly cited paper in Web-of-Science
Our publication on ComPPI, the compartmentalized protein-protein interaction database, published in Nucleic Acids Research Database Issue 2015 became a highly cited (top 1%) paper ranked by Web-of-Science.
A general adaptation mechanism of complex systems was published as a pair of pre-prints
Peter Csermely summarized several years of reading and thinking in a pair of preprints describing plasticity-rigidity cycles (http://arxiv.org/abs/1511.01239) and fast-and-slow network thinking (http://arxiv.org/abs/1511.01238) as general adaptation mechanisms of complex systems from macromolecules to cellular, neuronal and social networks. The latter paper is accompanided by several video illustrations, which can be seen at this web-page: http://linkgroup.hu/networkdecisions.php.
LINK-Group members established the Turbine start-up to design effective combination therapies with artificial intelligence
Several LINK-Group members established a biotech start-up firm, which is based on Kristóf Szalay's formerly developed Turbine network dynamics tool. Turbine’s built-in artificial intelligence methods predict how e.g. any type of cancer responds to treatment, screening millions of possible drug combinations on a cancer-specific signaling network. Please find more description at this web-site: http://turbine.hu.
EntOpt Cytoscape plug-in of a novel, entropy optimization-based network visualization method published in Scientific Reports
The EntOpt network visualization Cytoscape 3.1 plug-in (http://apps.cytoscape.org/apps/entoptlayout) is based on the concept of "A unified data representation theory for network visualization, ordering and coarse-graining" published now by István Kovács, Réka Mizsei and Peter Csermely in Scientific Reports (http://www.nature.com/articles/srep13786). The plug-in is in beta-phase, so we look for questions and advice to improve it. We are planning to extend the plug-in with hierarchical optimization, coarse-graining and ordering functions.
17 years-old LINK-Group member, Aron Perez Lopez published a paper on the better human interactome perturbation spreading effects of targets of drugs having side effects
Aron Perez Lopez, a 17 years-old member of the LINK Group (http://linkgroup.hu/AronPerez.php) published a paper accepted in Scientific Reports. The paper shows that in general, drug targets are better spreaders of perturbations than non-target proteins, and in particular, targets of drugs with side effects were also better spreaders of perturbations than targets of drugs having no reported side effects in human protein-protein interaction networks. Colorectal cancer-related proteins were good spreaders and had a high centrality, while type 2 diabetes-related proteins showed an average spreading efficiency and had an average centrality in the human interactome. Moreover, the interactome-distance between drug targets and disease-related proteins was higher in diabetes than in colorectal cancer. These results may help a better understanding of the network position and dynamics of drug targets and disease-related proteins, and may contribute to develop additional, network-based tests to increase the potential safety of drug candidates.
We have updated our ModuLand plug-in for Cytoscape 3.0
Daniel Ábrám completed and uploaded the Cytoscape 3.0-compatible updated version of our modularization program, ModuLand:
The ModuLand method family (PLoS ONE, 7, e12528) is determining and visualizing overlapping network modules (clusters/communities). The plug-in builds the hierarchy of network modules, where meta-nodes of the higher layer are the modules of the lower layer. The plug-in also calculates a number of topological measures such as community centrality, bridgeness and overlap, characterizing the centre of modules, as well as intermodular nodes (bridges) between two or more modules. More info here: www.modules.linkgroup.hu
EntOpt Cytoscape plug-in of a novel, entropy optimization-based network visualization method
Máté-Szalay Bekő completed and uploaded the EntOpt network visualization Cytoscape 3.1 plug-in (http://apps.cytoscape.org/apps/entoptlayout), which is based on the concept of "A unified data representation theory for network visualization, ordering and coarse-graining" published earlier by István Kovács, Réka Mizsei and Peter Csermely as a pre-print (http://arxiv.org/abs/1409.8420). The plug-in is in beta-phase, so Máté is looking for all questions and advice to improve it. We are planning to extend the plug-in with hierarchical optimization, coarse-graining and ordering functions..
Kristóf Zsolt Szalay and his Turbine toolkit won the Semmelweis Innovation Award 2015
We are happy to announce that the winner of the annual Semmelweis Innovation Award in the PhD work category is Kristóf Zsolt Szalay and his Turbine network dynamics toolkit!
Kristóf is going to hold a lecture with the title "Dinamikus hálózatelemzés és ami mögötte van" at the Semmelweis Innovation Day.
ComPPI has been accepted for publication in the NAR Database Issue 2015
Our paper "ComPPI: a cellular compartment-specific database for protein-protein interaction network analysis" describing the ComPPI database has been accepted for publication in the Nucleic Acids Research Database Issue 2015.
Turbine wins one of the best poster awards at Interdisciplinary Signaling Workshop 2014
The poster "Turbine: Novel dynamic analyses of signaling (and other) networks" by Kristóf Zsolt Szalay and Peter Csermely has won the Best poster award in the Network tools and resources section of the Interdisciplinary Signaling Workshop 2014.
Best interdisciplinary signaling team award
The team working on the topic "Can we create large-scale signaling networks?" originating from the LINK-Group at the Interdisciplinary Signaling Workshop 2014 has won the Best interdisciplinary signaling team award!
Members of the group were:
More than 100,000 visitors of the LINK-Group web-site
We would like to thank to our more than 100,000 visitors at this web-site.
We continue to add new algorithms, resources, papers, lectures and other information to the site. Please share your comments with us here: http://linkgroup.hu/email.php
Description of Turbine 1.4, an extensive tool for the analysis of network perturbations and dynamics was published in PLoS ONE
Turbine 1.4 is an open-source network analysis package for simulating network dynamics. It is particularly suited for experiments involving perturbations (i.e.: observing the effects of outside stimulations on a target network). Turbine is written in C++, and is currently available for Windows and Linux systems. Turbine is able to accommodate any model or real world networks, single, multiple, or continuous perturbations with custom-made delay or dissipation dynamics. You may see a more detailed characterization of the program and download all its components, source code, and detailed instructions here.The PLoS ONE paper describing the results obtained by Turbine can be accessed here: Download the document!
Description of NetworGame 2.0, a program package to simulate spatial games on model and real world networks with individual starting strategies of any nodes was published in PLoS ONE
The NetworGame program package is a cross-platform, multi-threaded, generic tool to simulate repeated spatial games. NetworGame accommodates any model or real-world networks and is able to set individual starting strategies to any nodes. The NetworGame program package is a console application augmented with a Graphical User Interface, and a data mining tool, which helps extracting and storing data in comma-separated value (csv) format. You may see a more detailed characterization of the program and download its Linux- or Windows-compatible packages, and detailed instructions here. The PLoS ONE paperdescribing the results obtained by NetworGame can be accessed here:
Our comprehensive review on the use of networks in drug design was published in Pharmacology & Therapeutics and was recommended 2 times as an F1000 Prime paper
A comprehensive review on the topology and dynamics of networks was published in Pharmacology & Therapeutics and was recommended 2 times at the maximum, 3-star level as an F1000 Prime paper.
In the review we cited 1270 references, and gave extensive examples on the use of network approach in drug design. Several novel concepts were formulated, including the concept of the "central hit strategy", which selectively targets central node/edges of the flexible networks of infectious agents or cancer cells to kill them. On the contrary, the "network influence strategy" works against other diseases, where an efficient reconfiguration of rigid networks needs to be achieved. The review can be downloaded from here.
Peter Csermely was elected as a member of the Hungarian Academy of Sciences
The LINK-member, Peter Csermely was elected as a member of the Hungarian Academy of Sciences. The Academy was established in 1825, covers all areas of science and the number of its members younger than 70 years can not be higher than 200.
Our extended signal transduction network and database, SignaLink 2.0 was highlighted by Science Signaling
SignaLink 2.0, the recently published extension of our former signaling network and database was highlighted in the March issue of Science Signaling. SignaLink 2.0 is the second network resource from our lab, after ModuLand featured by Science Signaling and included to their selected list of bioinformatics resources.
Peter Csermely was elected as a member of Academia Europaea and as president of the European Council for High Ability
LINK-Group member, Peter Csermely was elected at the Bergen-meeting of the Academia Europaea as a member of the academy.
He was also elected as the president of the European Council for High Ability between 2012 and 2016. The Council promotes network building of talent support acitvities in all European countries. This work is supported by the Budapest Centre of Talent Support established in the spring of 2012.
A Cytoscape plug-in of the ModuLand modularization program was published in Bioinformatics
An updated version of the user-friendly, platform independent implementation of the LinkLand method of the ModuLand method family published earlier in PLoS ONE became available as a plug-in for the widely used Cytoscape program. The paper introducing the plug-in was published in Bioinformatics and can be accessed here. The introducing paper demonstrates the usefulness of the method
The program file and its User Guide can be downloaded from here.
A joint paper with Ruth Nussinov on the new drug-design paradigm of allo-network drugs was published as the cover story of the December issue of Trends in Pharmacological Sciences
The paper proposed that the concept of allosteric drugs can be broadened to allo-network drugs, whose effects can propagate either within a protein, or across several proteins, to enhance or inhibit specific interactions along a pathway. Allo-network drugs can achieve specific, limited changes at the systems level, and in this way can achieve fewer side effects and lower toxicity. The paper summarized possible methods to identify allo-network drug targets and sites. The concept outlined a new paradigm in systems-based drug design. The paper, which was published as the cover story of the December issue of Trends in Pharmacological Sciences, can be downloaded from here.
Ágoston Mihalik's paper showing a partial desintegration of the yeast interactome as a general model of systems level adatptation processes has been published in PLoS Computational Biology
The paper described that heat shock induces a marked decrease in the overlap of the communities (modules) of the yeast interactome. Our results indicated that heat shock induces a partial disintegration of the protein-protein interaction network. The residual inter-modular bridges, maintaining the integrity of the interactome after stress, were key proteins of stress-survival. The changes observed may be rather general occurring at the initial phase of crises in many complex systems, such as proteins in physical stretch, ecosystems in abrupt environmental changes or social networks in economic crisis. De-coupling and re-wiring of modules emerges as a general model of adaptation and learning. The paper and its Supplement, which were published in PLoS Computational Biology, can be downloaded from here.
The Hungarian version of the book Weak Links was voted to the best 500 Hungarian books
A wide panel of experts has recently determined the “Márai-list”, which is a list of the top 500 Hungarian books (including the top 250 non-fiction books) among a competing 8,000 books recommended to all Hungarian libraries. The Hungarian version of the book Weak Links (a 2009 Springer book on networks, which is downloadable from here or at Google) has been included to this selection of the top 250 non-fiction Hungarian books.
A summary paper of our results appeared in Science Signaling: Network-based tools in the identification of novel drug-targets
A summary paper and an accompanying slide show of our work appeared in the May 2011 issue of Science Signaling. Slides were updated from the opening presentation at the International Conference on Systems Biology of Human Disease (SBHD) in Boston, Massachusetts, 16 to 18 June 2010. The paper contains several novel ideas on network dynamics and drug design, a summary of our very recent results as well as a brief description of a few ongoing projects. The paper is available here and the accompanying slideshow is downloadable from here.