Biomedical subjects

Anastasia Detsi

Publications and source records attributed to Anastasia Detsi.

4 recordsLinked to original sources

PubMed2004

Synthesis of chroman analogues of lipoic acid and evaluation of their activity against reperfusion arrhythmias.

Novel hybrids of lipoic acid and trolox connected through triamine spacers as well as analogues in which the lipoic acid was attached at different positions of the chroman moiety of vitamin E through an amide bond, were synthesized and exhibited strong inhibition of the microsomal lipid peroxidation. Moreover, the new molecules, at 1 microM concentration, reduced reperfusion arrhythmias and MDA content on isolated rat heart preparations, with the 2- and 5-subtituted chromans possessing the better cardioprotective activity.

Animals↗

PubMed2003

Antileishmanial ring-substituted ether phospholipids.

Three series of ring-substituted ether phospholipids were synthesized carrying N,N,N-trimethylammonium, N-methylpiperidino, or N-methylmorpholino headgroups. The first series is substituted by 2-cyclohexyloxyethyl or 2-(4-alkylidenecyclohexyloxy)ethyl groups, the second series by cyclohexylidenealkyl or adamantylidenealkyl moieties, and the third series by 2-aryloxyethyl or 6-aryloxyhexyl groups in the alkyl portion of the molecule. The antileishmanial activity of the new compounds was evaluated in vitro against the promastigote forms of L. donovani and L. infantum using an MTT (3-(4,5-dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide)-based microassay as a marker of cell viability. Analogues 12, 15, 24, 30, 32, 41, 43, and 45 were more potent than the control compound miltefosine (hexadecylphosphocholine) against both L. donovani and L. infantum while, derivatives 13 and 42 were equipotent to miltefosine. Analogues 16, 17, 19, 20 were more potent than miltefosine against L. infantumand compounds 27, 31, 44 were more active than miltefosine against L. donovani. Differential scanning calorimetry (DSC) was used to probe the role of individual ether phospholipids on the physicochemical properties of model membranes. The DSC scans showed that the active compounds have a more profound effect on the thermotropic properties of model membrane bilayers than the less active ones.

Animals↗

PubMed2003

Strategies in the design of prodrugs of anti-HIV agents.

Control of AIDS requires development of special therapeutic strategies in order to reduce the level of monocyte/macrophage HIV infection, to prevent spread of HIV within the monocyte/macrophage reservoir, to maintain a therapeutically effective drug concentration in sanctuaries such as the brain and to overcome the problem of cellular resistance mechanisms. A popular approach towards this end has been the development of prodrugs of anti-HIV drugs. This review covers the different strategies devised for the design of prodrugs of anti-HIV agents with emphasis on the recent findings in this field of research. Thus, prodrugs of nucleoside reverse transcriptase inhibitors (NRTIs) including, 5'-O carboxylic ester derivatives, 5'-O- monophosphate analogues, macromolecular derivatives, prodrugs of purine nucleosides, prodrugs of acyclic nucleosides, homo and hetero dinucleotides, prodrugs of non-classical nucleoside analogues, boranophosphate triesters of NRTIs, and prodrugs of protease inhibitors including acyl-substituted prodrugs, prodrugs with increased water solubility, monophosphate prodrugs, and conjugates of HIV protease inhibitors with a reverse transcriptase inhibitor through spontaneously cleavable linkers, constitute the subject of this review.

Anti-HIV Agents↗

PubMed2002

Synthesis of (Z)-4-hydroxytamoxifen and (Z)-2-[4-[1-(p-hydroxyphenyl)-2-phenyl]-1butenyl]phenoxyacetic acid.

The synthesis of (Z)-4-hydroxytamoxifen and (Z)-2-[4-[1-(p-hydroxyphenyl)-2-phenyl]-1-butenyl]phenoxyacetic acid was accomplished using a McMurry reaction as the key step. The perfluorotolyl derivatives of the McMurry products enabled the separation of the minor undesirable geometrical isomer. The methodology proceeds without E,Z isomerization, employs a very mild final debenzylation step compatible with a large array of functional groups, and can be applied to the generation of a variety of 4-hydroxytamoxifen analogues.

Acetates↗