title: Design and synthesis of potent antileishmanial cycloalkylidene-substituted ether phospholipid derivatives.
abstract: Two series of novel ether phospholipids (EPs) have been synthesized. The first includes cyclodecylidene- or cyclopentadecylidene-substituted EPs carrying N,N,N-trimethylammonium or N-methylpiperidino or N-methylmorpholino head groups. The second series encompasses more rigid head groups in combination with cycloalkylidene moieties in the lipid portion. In addition, hydrogenated derivatives were obtained. All the new analogues, except 33, were 1.5- to 62-fold more potent than miltefosine against the intracellular L. infantum, and the most active ones were also less cytotoxic against the human monocytic cell line THP1 and less hemolytic than miltefosine. The analogues that combine high potency with low cytotoxicity and hemolytic activity were 19, 37, 21 23, 38, 39, and 40. Cyclopentadecylpentylphosphocholine (38) possesses an IC50 of 0.7 microM against L. infantum amastigotes and is the least cytotoxic analogue, since it does not present toxicity against THP1 macrophages, even at a concentration that is 800-fold the antiparasitic IC50 value, and does not present significant hemolytic activity.
authors.affiliation: Institute of Organic and Pharmaceutical Chemistry, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece. tcalog@eie.gr
authors.forename: Theodora
authors.initials: T
authors.lastname: Calogeropoulou
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Angelou
authors.forename: Anastasia
authors.initials: A
authors.lastname: Detsi
authors.forename: Irene
authors.initials: I
authors.lastname: Fragiadaki
authors.forename: Effie
authors.initials: E
authors.lastname: Scoulica
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D003516:Cycloparaffins / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D015195:Drug Design; D004987:Ethers / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006461:Hemolysis; D006801:Humans; D007891:Leishmania / Q000187:drug effects*; D007893:Leishmania donovani / Q000187:drug effects; D018314:Leishmania infantum / Q000187:drug effects; D010767:Phosphorylcholine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D014344:Trypanocidal Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D003516:Cycloparaffins; D004987:Ethers; D014344:Trypanocidal Agents; C528855:cyclopentadecylpentylphosphocholine; D010767:Phosphorylcholine