Analogues of Thiolactomycin as Potential Antimalarial Agents
摘要:
Analogues of the natural antibiotic thiolactomycin (TLM), an inhibitor of the condensing reactions of type II fatty acid synthase, were synthesized and evaluated for their ability to inhibit the growth of the malaria parasite Plasmodium falciparum. Alkylation of the C4 hydroxyl group led to the most significant increase in growth inhibition (over a 100-fold increase in activity compared to TLM). To investigate the mode of action, the P. falciparum KASIII enzyme was produced for inhibitor assay. A number of TLM derivatives were identified that showed improved inhibition of this enzyme compared to TLM. Structure-activity relationships for enzyme inhibition were identified for some series of TLM analogues, and these also showed weak correlation with inhibition of parasite growth, but this did not hold for other series. On the basis of the lack of a clear correlation between inhibition of pfKASIII activity and parasite growth, we conclude that pfKASIII is not the primary target of TLM analogues. Some of the analogues also inhibited the growth of the parasitic protozoa Trypanosoma cruzi, T. brucei, and Leishmania donovani.
Analogues of thiolactomycin as potential anti-malarial and anti-trypanosomal agents
作者:S Jones
DOI:10.1016/j.bmc.2003.11.023
日期:2004.2.15
A series of analogues of the naturally occurring antibiotic thiolactomycin (TLM) have been synthesised and evaluated for their ability to inhibit the growth of the malaria parasite, Plasmodium falciparum. Thiolactomycin is an inhibitor of Type II fatty acid synthase which is found in plants and most prokaryotes, but not an inhibitor of Type I fatty acid synthase in mammals. A number of the analogues showed inhibition equal to or greater than TLM. The introduction of hydrophobic alkyl groups at the C3 and C5 positions of the thiolactone ring lead to increased inhibition, the best showing a fourteenfold increase in activity over TLM. In addition, some of the analogues showed activity when assayed against the parasitic protozoa, Trypanosoma cruzi and Trypanosoma brucei. (C) 2003 Elsevier Ltd. All rights reserved.
AQUEOUS COMPOSITION COMPRISING A COMPOUND OF THIOLACTONE TYPE AND A SILICONE AND PROCESS FOR TREATING KERATIN MATERIALS WITH THE COMPOSITION
申请人:L'Oreal
公开号:US20200030215A1
公开(公告)日:2020-01-30
The present invention relates to a composition comprising: (a) one more compound(s) of thiolactone type, and (b) one or more silicones.
COMPOSITION COMPRISING A COMPOUND OF THIOLACTONE TYPE AND A PARTICULAR SOLVENT AND PROCESS FOR TREATING KERATIN MATERIALS WITH THE COMPOSITION
申请人:L'Oreal
公开号:US20200031796A1
公开(公告)日:2020-01-30
The present invention relates to a composition comprising: (a) at least one compound of thiolactone type, and (b) one or more solvents, which may be identical or different, chosen from polar (non-)protic organic solvents; the pH of said composition being less than or equal to 7.