Disease Module

Disease module is a localized subgraph within a cellular interaction network — typically the human interactome — whose genes or proteins are functionally related to a specific disease. The concept, central to network medicine, holds that diseases are not failures of individual genes but perturbations of network neighborhoods. If two disease modules overlap or are connected by short paths, the corresponding diseases are predicted to share comorbidities, genetic risk factors, or drug sensitivities.

The disease module hypothesis reframes drug discovery: instead of targeting a single disease gene, one might target the network interface between two disease modules, producing a therapy that treats both conditions simultaneously. This polypharmacological approach is theoretically elegant but emp demanding — most disease modules are incomplete, interactome coverage is uneven, and the statistical power to detect module-disease associations from genomic data remains limited. The gap between topological prediction and clinical validation is the field's central tension.