Carbonic anhydrase IX (CAIX) is a promising target in cancer therapy especially in the case of hypoxia-induced tumors. The selective inhibition of CA isozymes is a challenging task in drug design and discovery process. Here, we performed fluorescence-binding studies and inhibition assay combined...

The aim of this work are experimental and computational structural studies of new derivatives of 1-cyanoacetyl-4-arylsemicarbazide with potential anticancer activity. We considered 10 possible tautomeric forms and ranked them according to their energy of stabilization using quantum chemical calc...

Human dipeptidyl peptidase I (hDPPI, cathepsin C, EC 3.4.14.1) is a novel putative drug target for the treatment of inflammatory diseases. Using 1 as a starting point (IC50 > 10 μM), we have improved potency by more than 500-fold and successfully identified novel inhibitors of DPPI via screenin...

We report synthesis, anti-tuberculosis activity and 3D-QSAR study of forty nine hydrazide, semicarbazide and thiosemicarbazide derivatives of 4-(adamantan-1-yl)quinoline. The most potent compounds upon evaluation for anti-tuberculosis activity exhibited MIC99 of 3.125 μg/mL against Mycobacteriu...

A series of 16 N1-(3-chloro-4-fluorophenyl)-N4-substituted semicarbazone derivatives were synthesized and subjected to computational pharmacokinetic studies to predict molecular properties. All the title compounds (4a–p) followed the Lipinski “Rule of Five”. The synthesized compounds were cha...

Summary2-Hexadecynoic acid and 2-octadecynoic acid have cidal activity against Mycobacterium smegmatis and Mycobacterium bovis BCG. At subinhibitory concentrations, M. smegmatis rapidly transformed [1-14C]-2-hexadecynoic acid into endogenous fatty acids and elongated them into mycolic acids. Tox...

Earlier studies from our laboratory strongly suggested that a single or similar cytochrome P450 isoform(s) isolated from microsomes of wheat catalyze the oxidation of the medium-chain fatty acid, lauric acid, and the wheat selective herbicide diclofop. Lauric acid is mainly hydroxylated at the s...

The study of the stereochemistry and regioselectivity of plant fatty acid hydroxylases is hampered by the difficulty to purify plant cytochrome P-450 enzymes. To provide an alternative, we have now defined an experimental plant system which expresses only one hydroxylase activity towards lauric ...

The N.M.R. spectra of the cis octadecenoic (Δ2–Δ17), octadecynoic (Δ2–Δ5, Δ10), and dodecynoic (Δ5–Δ11) acids have been recorded. Those with unsaturation near the centre of the molecule cannot be distinguished from one another but the four isomers with unsaturation closest to the carbo...

All the cis n-octadecenoic acids (Δ2–Δ17) have been synthesised along with several dodecenoic (Δ7–Δ11), dodecynoic (Δ7–Δ11), and octadecynoic (Δ2, Δ4–Δ12) acids required as intermediat es.

Lauric acid in-chain hydroxylation is inhibited in microsomes from Jerusalem artichoke tubers (Helianthus tuberosus L.) incubated with 9-decenoic, 11-dodecenoic, or 11-dodecynoic acids. 9-Decenoic acid is at best a weak competitive inhibitor of the inchain hydroxylase, but inactivates the enzyme...

Microsomal cytochrome P450-dependent lauric acid hydroxylase activities were characterized in liver, kidney, and intestinal mucosa of the sea bass (Dicentrarchus labrax). Microsomes from these organs generated (ω-1)-hydroxylauric acid and a mixture of positional isomers including (ω)-, (ω-2)-...

The microsomal fraction from Vicia sativa L. cv. Septimane contains a cytochrome P-450-dependent lauric acid ω-hydroxylase that is inactivated in a time-dependent, pseudo-first-order manner when the microsomes are incubated with 11-dodecynoic acid. The rate constant for the inactivation is appr...

S-(2-Hydroxy-2-carboxyethyl)homocysteine, S-(3-hydroxy-3-carboxy-n-propyl)-cysteine, N-acylated S-(β-carboxyethyl)cysteine, and N-acylated S-(3-hydroxy-3-carboxy-n-propyl) cysteine were excreted in the urine after dl-propargylglycine treatment. Cystathionine was also accumulated in several tiss...

Hydrogen sulfide (H2S), carbon monoxide (CO) and nitric oxide (NO) share signaling and vasorelaxant properties and are involved in proliferation and apoptosis. Inhibiting NO production or availability induces hypertension and proteinuria, which is prevented by concomitant blockade of the H2S pro...

A new family of 2,3,12,13-tetrakis(2-thienyl)-5,10,15,20-tetraphenylporphyrins, H2TPP(2-thienyl)4 were synthesized by a Stille cross-coupling reaction using 2,3,12,13-tetrabromo-5,10,15,20-tetraphenylporphyrin, H2TPPBr4 as the precursor. Its metal (Co(II), Cu(II) and Zn(II)) complexes were synth...

In our search for new antiamoebic agents, a new series of ethyl and methyl quinoxaline-7-carboxylate 1,4-di-N-oxide derivatives have been synthesized using the Beirut reaction. All compounds were characterized by spectroscopic techniques and elemental analysis. Antiamoebic activity was evaluated...

A novel electrochemically-doped vinyl polymer containing 1,4-di(2-thienyl)benzene as a pendant group has been prepared by anodic polymerization of the corresponding vinyl monomer in the presence of tetra-n-butylammonium perchlorate as a supporting electrolyte and its electrochromic properties in...

4,4′-Bis[2-(2-phenylethynyl)-3-thienyl]biphenyl, 4,4′-bis[2-{2-(trimethylsilyl)ethynyl}-3-thienyl]biphenyl and their congeners were prepared and their properties were studied. Extension of π-system through the central benzene ring was suggested by UV–vis spectra. Connection of two 1,4-bis[2-...

The electrochemical and optical properties in poly(trans-1,2-di(2-thienyl)ethylene),trans-PTE, and poly(1,4-di(2-thienyl)-13-butadiene), PTB, in comparison with those of polythiophene, PT, during electrochemical p-type doping have been investigated by the cyclic voltammetry and in situ optical-a...