Host signaling proteins

Host signaling proteins encompass a vast array of intracellular and membrane-bound molecules that facilitate the transmission of biochemical signals to regulate cellular behavior (Source: UniProt). This category includes diverse families such as protein kinases, phosphatases, G protein-coupled receptors, and transcription factors that govern essential processes like cell growth, immune responses, and apoptosis (Source: Nature Reviews Molecular Cell Biology). In many pathological conditions, such as oncogenesis or chronic inflammation, these signaling pathways are constitutively active or suppressed, leading to disease progression (Source: PubMed). Furthermore, host signaling proteins are critical in the context of host-directed therapies (HDTs), where drugs target cellular pathways rather than the pathogen itself to treat infections like COVID-19 or tuberculosis (Source: Lancet Infectious Diseases). Because these proteins are integral to normal physiology, pharmacological modulation requires precise targeting to avoid systemic toxicity and significant safety concerns (Source: Science Signaling). The term is generally considered a broad classification rather than a single therapeutic target, as it covers thousands of distinct proteins with varying functions.

Other names

Host cell signaling proteinsHost-directed therapy targetsCellular signaling componentsHost factorsIntracellular signaling molecules

Modulation of host cellular pathways, including the inhibition of protein kinases, antagonism of cell surface receptors, and regulation of transcription factor activity to alter gene expression and cellular function (Source: Nature Reviews Drug Discovery).