Polyamine

Polyamines are a class of small, aliphatic, polycationic organic molecules that contain two or more amino groups, the most notable being putrescine, spermidine, and spermine[1][4]. They are essential biomolecules found in essentially all living cells, where they participate in a multitude of cellular processes including DNA stabilization and synthesis, regulation of gene expression, modulation of ion channels, and involvement in cell growth and proliferation[2][4][5]. Polyamines bind to nucleic acids, proteins, and membranes, thereby modulating fundamental aspects of cell biology, notably cell cycle progression, apoptosis, immune cell function, and stress responses[3][4][5]. Dysregulation of polyamine metabolism is associated with a spectrum of diseases, most prominently cancer, inflammation, neurodegenerative disorders, and cardiovascular disease[3][7][8]. While polyamines themselves are not canonical drug targets such as receptors or enzymes, their metabolic pathways and transporters (including ornithine decarboxylase, antizyme, or SLC transporters) have been targeted therapeutically for conditions including African trypanosomiasis (DFMO) and have been explored in oncology and immunology[3][4]. Most drugs target polyamine synthesis, uptake, or breakdown, and some act as polyamine analogues to disrupt normal function[3][8]. There are no standardized clinical biomarkers in routine use; measurement of polyamines in body fluids is investigational for cancer and neurodegeneration[4]. Safety concerns when modulating polyamine pathways include the potential for harming rapidly dividing normal cells, which may lead to toxicity in tissues with high turnover[4][8].

Other names

PutrescineSpermidineSperminePAs

Inhibition of polyamine biosynthesis (e.g., ODC inhibition), Inhibition of polyamine transport, Depletion of intracellular polyamine levels