Haematin (haem) polymerization and its inhibition by quinoline antimalarials. 1997

R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
Pharmaceuticals Division (PRPI), F. Hoffmann-La Roche, Basel, Switzerland. robert_g.ridley@roche.com

Haematin (ferriprotoporphyrin IX) is released from haemoglobin during its degradation in the malarial parasites' food vacuole and is detoxified by its polymerization into a form of beta-haematin called haemozoin, or malarial pigment. This process is protein independent in vitro. Quinoline antimalarial blood schizonticides accumulate in the food vacuole and may inhibit haematin polymerization by binding to haematin and preventing its incorporation into the growing haemozoin chain. Drug resistance to quinolines is thought to be due to reduced accumulation of the drug in the food vacuole. As some quinolines overcome this resistance, quinolines, as a class, remain a potential source of future antimalarial drugs.

UI MeSH Term Description Entries
D010860 Pigments, Biological Any normal or abnormal coloring matter in PLANTS; ANIMALS or micro-organisms. Biological Pigments
D010961 Plasmodium A genus of protozoa that comprise the malaria parasites of mammals. Four species infect humans (although occasional infections with primate malarias may occur). These are PLASMODIUM FALCIPARUM; PLASMODIUM MALARIAE; PLASMODIUM OVALE, and PLASMODIUM VIVAX. Species causing infection in vertebrates other than man include: PLASMODIUM BERGHEI; PLASMODIUM CHABAUDI; P. vinckei, and PLASMODIUM YOELII in rodents; P. brasilianum, PLASMODIUM CYNOMOLGI; and PLASMODIUM KNOWLESI in monkeys; and PLASMODIUM GALLINACEUM in chickens. Plasmodiums
D011108 Polymers Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS). Polymer
D011804 Quinolines
D006420 Hemeproteins Proteins that contain an iron-porphyrin, or heme, prosthetic group resembling that of hemoglobin. (From Lehninger, Principles of Biochemistry, 1982, p480) Hemeprotein,Heme Protein,Heme Proteins,Protein, Heme,Proteins, Heme
D006427 Hemin Chloro(7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-N(21),N(22),N(23),N(24)) ferrate(2-) dihydrogen. Ferriprotoporphyrin,Hematin,Alkaline Hematin D-575,Chlorohemin,Ferrihaem,Ferriheme Chloride,Ferriprotoporphyrin IX,Ferriprotoporphyrin IX Chloride,Panhematin,Protohemin,Protohemin IX,Alkaline Hematin D 575,Chloride, Ferriheme,Chloride, Ferriprotoporphyrin IX,Hematin D-575, Alkaline
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000962 Antimalarials Agents used in the treatment of malaria. They are usually classified on the basis of their action against plasmodia at different stages in their life cycle in the human. (From AMA, Drug Evaluations Annual, 1992, p1585) Anti-Malarial,Antimalarial,Antimalarial Agent,Antimalarial Drug,Anti-Malarials,Antimalarial Agents,Antimalarial Drugs,Agent, Antimalarial,Agents, Antimalarial,Anti Malarial,Anti Malarials,Drug, Antimalarial,Drugs, Antimalarial
D014617 Vacuoles Any spaces or cavities within a cell. They may function in digestion, storage, secretion, or excretion. Vacuole

Related Publications

R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
April 1999, The Biochemical journal,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
August 1996, Biochemical pharmacology,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
March 2002, Biochemical pharmacology,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
January 1969, Journal of medicinal chemistry,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
April 1954, The Biochemical journal,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
August 1950, The Biochemical journal,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
July 1948, Nature,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
November 1995, Nature,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
February 1997, International journal for parasitology,
R G Ridley, and A Dorn, and S R Vippagunta, and J L Vennerstrom
November 2010, European journal of medicinal chemistry,
Copied contents to your clipboard!