Polyamine pathway components

The polyamine pathway components encompass a network of enzymes and transporters responsible for the synthesis, interconversion, and transport of polyamines such as putrescine, spermidine, and spermine. These small aliphatic polycations are essential for fundamental cellular processes, including DNA replication, RNA transcription, protein translation, and membrane stabilization (NIH, 2016; ScienceOpen, 2026). In many cancers, the polyamine pathway is upregulated to support rapid cell proliferation, making enzymes like ornithine decarboxylase (ODC) and S-adenosylmethionine decarboxylase (SAMDC) attractive therapeutic targets (NIH, 2012; MDPI, 2024). Beyond oncology, polyamine metabolism is implicated in neurodegenerative diseases, stroke, and infectious diseases like African sleeping sickness, where specific inhibitors like eflornithine have shown clinical utility (NIH, 2004; KoreaScience, 2012). Therapeutic strategies often involve inhibiting biosynthetic enzymes, activating catabolic enzymes like spermidine/spermine N1-acetyltransferase (SSAT), or blocking polyamine transport with agents like AMXT 1501 to deplete intracellular polyamine pools and overcome compensatory uptake mechanisms (ACS, 2010; Main Line Health, 2018).

Other names

Polyamine metabolic pathwayPolyamine biosynthetic and catabolic enzymesPolyamine homeostasis components

Inhibition of polyamine biosynthetic enzymes (e.g., ODC, SAMDC), induction of catabolic enzymes (e.g., SSAT), and blockade of polyamine transport systems to deplete intracellular polyamine pools and induce cytostasis or apoptosis.