Plasmodium vivax hypnozoite redox homeostasis

Plasmodium vivax hypnozoite redox homeostasis refers to the complex biochemical system used by the dormant liver-stage parasites to maintain a stable internal environment against oxidative stress. This system is critical for the long-term survival and eventual reactivation of hypnozoites, which are responsible for the relapsing nature of P. vivax malaria. The redox balance is maintained by a suite of enzymes, including thioredoxin reductase and glutathione reductase, which counteract reactive oxygen species (ROS) generated during metabolism. Therapeutic targeting of this homeostasis is primarily achieved through 8-aminoquinoline drugs like primaquine and tafenoquine. These agents are converted into reactive metabolites that induce catastrophic oxidative damage within the parasite. Disrupting redox homeostasis is currently the only clinically validated strategy for achieving a radical cure by eliminating the hypnozoite reservoir. This target is particularly challenging due to the quiescent nature of the hypnozoite and the requirement for host-mediated drug activation.

Other names

Redox metabolismAntioxidant systemOxidative stress responseRedox balance

Disruption of the parasite's redox balance through the generation of reactive oxygen species (ROS) and interference with antioxidant defense enzymes.