Heme polymerization process

The heme polymerization process is a biochemical detoxification pathway essential for the survival of Plasmodium parasites (the causative agents of malaria) during blood-stage infection. As the parasite digests host hemoglobin within its acidic digestive vacuole, toxic free heme (ferriprotoporphyrin IX) is released. To avoid heme-induced oxidative damage, the parasite polymerizes it into chemically inert crystals known as hemozoin (malaria pigment). Histidine-rich proteins, such as Plasmodium falciparum histidine-rich protein II (HRPII), are implicated as heme polymerases catalyzing this process. Inhibition of heme polymerization (e.g., by quinoline antimalarials like chloroquine and related compounds) causes toxic heme to accumulate, leading to parasite death, making this process a unique and validated therapeutic target specific to malaria parasites. Note: "Heme polymerization process" refers to a biological pathway or process, not a single identifiable molecule, protein, or receptor, thus making "is_incorrect: true"—the canonical drug target is the protein(s) catalyzing this process, not the process itself.

Other names

Hemozoin formationHeme detoxificationHematin polymerization

Inhibition of heme polymerization, leading to accumulation of toxic free heme in Plasmodium spp.