Abstract
Plasmodium falciparum is responsible for the majority of life-threatening cases of human malaria. The global emergence of drug-resistant malarial parasites necessitates identification and characterization of novel drug targets. At present, carbonic anhydrase (CA) genes are identified in limited numbers of protozoa and helminthes parasites, however, they are demonstrated in at least 4 Plasmodium species. The CA gene of P. falciparum encodes an α-carbonic anhydrase enzyme possessing catalytic properties distinct of that of the human host enzymes. A small library of aromatic sulfonamides, most of which were Schiffs bases derived from sulfanilamide/homosulfanilamide/4-aminoethylbenzenesulfonamide and substituted-aromatic aldehydes, or ureido-substituted sulfonamides are good inhibitors of P. falciparum enzyme. The 4-(3,4-dichlorophenylureido-ethyl)-benzenesulfonamide is the most effective antimalarial activity against growth of P. falciparum in vitro. The nature of the groups substituting the aromatic-ureido- or aromatic-azomethine fragment of the molecule and the length of the parent sulfonamide (i.e., from sulfanilamide to 4- aminoethylbenzenesulfonamide) from which the Schiffs base obtained, are the critical parameters for the CA inhibitory activities of these aromatic sulfonamide derivatives, both against the malarial as well as human enzymes. Thus, the sulfonamide CA inhibitors may have the potential for the development of novel antimalarial drugs.
Keywords: Plasmodium berghei, Aedes aegypti, Carbonic Anhydrase Gene, Sulfonamides, Acetazolamide
Current Topics in Medicinal Chemistry
Title: Malarial Parasite Carbonic Anhydrase and Its Inhibitors
Volume: 7 Issue: 9
Author(s): Jerapan Krungkrai, Sudaratana R. Krungkrai and Claudiu T. Supuran
Affiliation:
Keywords: Plasmodium berghei, Aedes aegypti, Carbonic Anhydrase Gene, Sulfonamides, Acetazolamide
Abstract: Plasmodium falciparum is responsible for the majority of life-threatening cases of human malaria. The global emergence of drug-resistant malarial parasites necessitates identification and characterization of novel drug targets. At present, carbonic anhydrase (CA) genes are identified in limited numbers of protozoa and helminthes parasites, however, they are demonstrated in at least 4 Plasmodium species. The CA gene of P. falciparum encodes an α-carbonic anhydrase enzyme possessing catalytic properties distinct of that of the human host enzymes. A small library of aromatic sulfonamides, most of which were Schiffs bases derived from sulfanilamide/homosulfanilamide/4-aminoethylbenzenesulfonamide and substituted-aromatic aldehydes, or ureido-substituted sulfonamides are good inhibitors of P. falciparum enzyme. The 4-(3,4-dichlorophenylureido-ethyl)-benzenesulfonamide is the most effective antimalarial activity against growth of P. falciparum in vitro. The nature of the groups substituting the aromatic-ureido- or aromatic-azomethine fragment of the molecule and the length of the parent sulfonamide (i.e., from sulfanilamide to 4- aminoethylbenzenesulfonamide) from which the Schiffs base obtained, are the critical parameters for the CA inhibitory activities of these aromatic sulfonamide derivatives, both against the malarial as well as human enzymes. Thus, the sulfonamide CA inhibitors may have the potential for the development of novel antimalarial drugs.
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Krungkrai Jerapan, Krungkrai R. Sudaratana and Supuran T. Claudiu, Malarial Parasite Carbonic Anhydrase and Its Inhibitors, Current Topics in Medicinal Chemistry 2007; 7 (9) . https://dx.doi.org/10.2174/156802607780636744
DOI https://dx.doi.org/10.2174/156802607780636744 |
Print ISSN 1568-0266 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4294 |
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