Quantifying the relevance of different mediators in the human immune cell network

Details Quantifying the relevance of different mediators in the human immune cell network Quantifying the relevance of different mediators in the human immune cell network

2004-09-17

arxiv.org/abs/q-bio/0409020v1

Bioinformatics. 2005 Apr 15;21(8):1639-43. Epub 2004 Dec 21.

Biology

Quantitative Biology

Molecular Networks

10 pages, 3 figures

Scientific paper

Immune cells coordinate their efforts for the correct and efficient functioning of the immune system (IS). Each cell type plays a distinct role and communicates with other cell types through mediators such as cytokines, chemokines and hormones, among others, that are crucial for the functioning of the IS and its fine tuning. Nevertheless, a quantitative analysis of the topological properties of an immunological network involving this complex interchange of mediators among immune cells is still lacking. Here we present a method for quantifying the relevance of different mediators in the immune network, which exploits a definition of centrality based on the concept of efficient communication. The analysis, applied to the human immune system, indicates that its mediators significantly differ in their network relevance. We found that cytokines involved in innate immunity and inflammation and some hormones rank highest in the network, revealing that the most prominent mediators of the IS are molecules involved in these ancestral types of defence mechanisms highly integrated with the adaptive immune response, and at the interplay among the nervous, the endocrine and the immune systems.

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