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In silico pharmacology for drug discovery: methods for virtual ligand screening and profiling Ekins S; Mestres J; Testa BBr J Pharmacol 2007[Sep]; 152 (1): 9-20Pharmacology over the past 100 years has had a rich tradition of scientists with the ability to form qualitative or semi-quantitative relations between molecular structure and activity in cerebro. To test these hypotheses they have consistently used traditional pharmacology tools such as in vivo and in vitro models. Increasingly over the last decade however we have seen that computational (in silico) methods have been developed and applied to pharmacology hypothesis development and testing. These in silico methods include databases, quantitative structure-activity relationships, pharmacophores, homology models and other molecular modeling approaches, machine learning, data mining, network analysis tools and data analysis tools that use a computer. In silico methods are primarily used alongside the generation of in vitro data both to create the model and to test it. Such models have seen frequent use in the discovery and optimization of novel molecules with affinity to a target, the clarification of absorption, distribution, metabolism, excretion and toxicity properties as well as physicochemical characterization. The aim of this review is to illustrate some of the in silico methods for pharmacology that are used in drug discovery. Further applications of these methods to specific targets and their limitations will be discussed in the second accompanying part of this review.|*Computer-Aided Design/history[MESH]|*Databases as Topic[MESH]|*Drug Design[MESH]|*Ligands[MESH]|*Systems Biology[MESH]|*User-Computer Interface[MESH]|Animals[MESH]|Computer Graphics[MESH]|Gene Regulatory Networks[MESH]|History, 19th Century[MESH]|History, 20th Century[MESH]|Humans[MESH]|Metabolic Networks and Pathways[MESH]|Models, Biological[MESH]|Models, Molecular[MESH]|Molecular Structure[MESH]|Pharmacokinetics[MESH]|Protein Conformation[MESH]|Quantitative Structure-Activity Relationship[MESH]|Signal Transduction[MESH] |