Mitochondrial and protozoal DNA and other macromolecular cellular structures

Mitochondrial and protozoal DNA and other macromolecular cellular structures is a collective term for the various intracellular components targeted by certain antiparasitic agents, most notably the diamidine class (DrugBank, DB00738). These targets include the kinetoplast DNA (kDNA), a unique and complex network of circular DNA found in the single mitochondrion of kinetoplastid protozoa such as Trypanosoma and Leishmania species (PubMed, 12633522). Drugs like pentamidine bind to the minor groove of adenine-thymine (AT) rich sequences within this DNA, which inhibits the activity of topoisomerases and disrupts the replication and transcription of the parasite's genome (StatPearls, NBK513350). Additionally, these drugs may interfere with the synthesis of RNA, proteins, and phospholipids, and can cause a collapse of the mitochondrial membrane potential (PubChem, CID 4735). Because these structures are essential for the parasite's energy production and reproduction, they are critical for treating diseases like African trypanosomiasis, leishmaniasis, and Pneumocystis jirovecii pneumonia. However, the lack of absolute specificity for parasite versus host mitochondrial structures can lead to significant clinical safety concerns, including nephrotoxicity and dysglycemia (NIH, PMC374035).

Other names

Kinetoplast DNAMitochondrial DNAProtozoal DNAMacromolecular cellular structures

Binding to the minor groove of AT-rich regions of DNA, inhibiting replication and transcription, and disrupting mitochondrial function.