General introduction Ion channels G-protein coupled receptors Second messengers Tyrosine kinase receptors From plasma membrane to the nucleus Regulation of gene expression Cytokine signaling Cell cycle Apoptosis Cell signaling and diseasesGeneral introduction Ion channels G-protein coupled receptors Second messengers Tyrosine kinase receptors From plasma membrane to the nucleus: Regulation of gene expression Cytokine signaling Cell cycle Apoptosis Cell signaling and diseases