Synthesis and comparison of antiplasmodial activity of (+), (-) and racemic 7-chloro-4-(N-lupinyl)aminoquinoline. 2012

Chiara Rusconi, and Nadia Vaiana, and Manolo Casagrande, and Nicoletta Basilico, and Silvia Parapini, and Donatella Taramelli, and Sergio Romeo, and Anna Sparatore
Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milan, Italy.

Recently the N-(-)-lupinyl-derivative of 7-chloro-4-aminoquinoline ((-)-AM-1; 7-chloro-4-{N-[(1S,9aR)(octahydro-2H-quinolizin-1-yl)methyl]amino}quinoline) showed potent in vitro and in vivo activity against both Chloroquine susceptible and resistant strains of Plasmodium falciparum. However, (-)-AM-1 is synthesized starting from (-)-lupinine, an expensive alkaloid isolated from Lupinus luteus whose worldwide production is not sufficient, at present, for large market purposes. To overcome this issue, the corresponding racemic compound, derived from synthetic (±)-lupinine was considered a cheaper alternative for the development of a novel antimalarial agent. Therefore, the racemic and the 7-chloro-4-(N-(+)-lupinyl)aminoquinoline ((±)-AM-1; (+)-AM-1) were synthesized and their in vitro antimalarial activity and cytotoxicity compared with those of (-)-AM-1. The (+)-lupinine required for the synthesis of (+)-AM-1 was obtained through a not previously described lipase catalyzed kinetic resolution of (±)-lupinine. In terms of antimalarial activity, (±)-AM1 and (+)-AM1 demonstrated very good activity in vitro against both CQ-R and CQ-S strains of P. falciparum (range IC(50) 16-35 nM), and low toxicity against human normal cell lines (therapeutic index >1000), comparable with that of (-)-AM1. These results confirm that the racemate (±)-AM1 could be considered as a potential antimalarial agent, ensuring a decrease of costs of synthesis compared to (-)-AM1.

UI MeSH Term Description Entries
D010963 Plasmodium falciparum A species of protozoa that is the causal agent of falciparum malaria (MALARIA, FALCIPARUM). It is most prevalent in the tropics and subtropics. Plasmodium falciparums,falciparums, Plasmodium
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D002470 Cell Survival The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability. Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000634 Aminoquinolines Quinolines substituted in any position by one or more amino groups.
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
D013034 Sparteine A quinolizidine alkaloid isolated from several FABACEAE including LUPINUS; SPARTIUM; and CYTISUS. It has been used as an oxytocic and an anti-arrhythmia agent. It has also been of interest as an indicator of CYP2D6 genotype. 7,14-Methano-2H,6H-dipyrido(1,2-a:1',2'-e)(1,5)diazocine, dodecahydro-, (7S-(7alpha,7aalpha,14alpha,14abeta))-,Lupinidin,Lupinidine,Pachycarpine,D-sparteine,Depasan Retard,Genisteine Alkaloid,L-Sparteine,Pachycarpine Sulfate (1:1), Pentahydrate, (7S-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Hydrochloride, (7R-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Hydrochloride, (7S-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Hydroiodide, (7R-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Monohydrochloride, (7R-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Monohydroiodide, (7R-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Sulfate,Sparteine Sulfate (1:1), (7S-(7alpha,7aalpha,14alpha,14aalpha))-Isomer,Sparteine Sulfate (1:1), (7S-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine Sulfate Anhydrous,Sparteine, (+)-Isomer,Sparteine, (-)-Isomer,Sparteine, (7R-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine, (7R-(7alpha,7abeta,14alpha,14abeta))-Isomer,Sparteine, (7S-(7alpha,7aalpha,14alpha,14aalpha))-Isomer,Sparteine, (7S-(7alpha,7aalpha,14alpha,14abeta))-Isomer,Sparteine, (7S-(7alpha,7abeta,14alpha,14abeta))-Isomer,alpha-Isosparteine,beta-Isosparteine,Anhydrous, Sparteine Sulfate,Sulfate Anhydrous, Sparteine,alpha Isosparteine,beta Isosparteine
D013237 Stereoisomerism The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed) Molecular Stereochemistry,Stereoisomers,Stereochemistry, Molecular,Stereoisomer
D020128 Inhibitory Concentration 50 The concentration of a compound needed to reduce population growth of organisms, including eukaryotic cells, by 50% in vitro. Though often expressed to denote in vitro antibacterial activity, it is also used as a benchmark for cytotoxicity to eukaryotic cells in culture. IC50,Concentration 50, Inhibitory
D031297 Lupinus A plant genus of the family FABACEAE that is a source of SPARTEINE, lupanine and other lupin alkaloids. Lupine,Lupines

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