Synthesis and examination of 1,2,4-triazine-sulfonamide hybrids as potential inhibitory drugs: Inhibition effects on AChE and GST enzymes in silico and in vitro conditions

The crucial functions of acetylcholinesterase (AChE) in neurotransmission and glutathione S-transferase (GST) in detoxification and cellular protection underscore their pivotal roles as key enzymes, essential for maintaining the integrity of neurological and cellular homeostasis. For this purpose, a series of 1,2,4-triazine-sulfonamide hybrids (3a-r) was successfully synthesized, and subsequently evaluated for their inhibitory effects on AChE and GST. The investigation was complemented by molecular docking studies and ADMET (Absorption, Distribution, Metabolism, Excretion, and Toxicity) predictions. The synthesized hybrids demonstrated significant promise in inhibiting both AChE and GST activities. Molecular docking analyses provided insights into the interactions between the compounds and the target enzymes, shedding light on potential binding modes and key amino acid residues involved. Furthermore, the study benefited from ADMET predictions, offering valuable information on the compounds' pharmacokinetic properties and potential toxicity. The promising results obtained from this comprehensive approach highlight the potential of these 1,2,4-triazine-sulfonamide hybrids as effective inhibitors of AChE and GST, paving the way for further development and optimization in the pursuit of novel therapeutic agents.

Synthesis, combined theoretical and spectral characterization of some new 1,3,5 triazine compounds, and their in vitro biological analysis

New N-heterocyclic compounds with a 1,3,5 triazine core were synthesized by a nucleophilic substitution reaction.

Investigation of the protective effect of acetazolamide and SLC-0111 on carbon tetrachloride-induced toxicity in fruit fly

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D. melanogaster was exposed to Acetazolamide (AAZ) and SLC-0111 against carbon tetrachloride-induced toxicity.

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Feeding with AAZ and SLC-0111 increased development times.

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The AAZ and SLC-0111 increased the activity of antioxidant enzymes thus reducing the high percentage of survival in adults caused by the CCl4 induced toxicity.

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AAZ and SLC-0111 were reduced CCl4-induced oxidative stress in adipose tissue in D. melanogaster and were positively affect the development of organisms.

Sulfonamide-based compounds in the development of drugs used in cancer treatment have been started to be investigated recently. In the current work, it was determined the protective effect of Acetazolamide (AAZ) and SLC-0111 on carbon tetrachloride-induced toxicity in the fruit fly (Drosophila melanogaster). AAZ and SLC-0111 were used as a nonselective and selective inhibitor of carbonic anhydrase isozymes, respectively, to compare the selectivity effect of drugs on toxicity. The experimental toxicity was created by carbon tetrachloride (CCl₄) that causes tissue damage to the first stage larvae of fruit fly and used as a model organism. The effect of AAZ and SLC-0111 on toxicity of insect survival, sex ratio, longevity and some biochemical parameters such as Malondialdehyde-MDA content, Superoxide dismutase-SOD and Glutathione-S-transferase-GST activity were tested. According to the data obtained, feeding of insects with AAZ and SLC-0111 (2.5 and 10 mM, respectively) affected their survival and development positively against the toxicity induced by CCl₄. Compared to the control group, GST and SOD activity was higher in pups and adults (SLC-0111 < AAZ). Because of this study, SLC-0111 is thought to be useful in protecting against the harmful effects of reactive oxygen species.

Synthesis, Characterization, and BSA-Binding Studies of Novel Sulfonated Zinc-Triazine Complexes

Four Zn(II) complexes containing a pyridyl triazine core (L1 = 3-(2-pyridyl)-5,6-di(2-furyl)-1,2,4-triazine-5′,5″-disulfonic acid disodium salt and L2 = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine-4′,4″-disulfonic acid sodium salt) were synthesized, and their chemical formulas were finalized as [Zn(L1)Cl₂]·5H₂O·ZnCl₂ (1), [Zn(L1)₂Cl₂]·4H₂O·2CH₃OH (2), [Zn(L2)Cl₂]·3H₂O·CH₃OH (3), and [Zn(L2)₂Cl₂] (4). The synthesized complexes are water soluble, making them good candidates for biological applications. All four complexes have been characterized by elemental analysis and ¹H NMR, IR, and UV-Vis spectroscopy. The IR stretching frequency of N=N and C=N bonds of complexes 1–4 have shifted to lower frequencies in comparison with free ligands, and a bathochromic shift was observed in UV-Vis spectra of all four complexes. The binding studies of ligands and complexes 1–4 with bovine serum albumin (BSA) resulted binding constants (K_b) of 3.09 × 10⁴ M⁻¹, 12.30 × 10⁴ M⁻¹, and 16.84 × 10⁴ M⁻¹ for ferene, complex 1, and complex 2, respectively, indicating potent serum distribution via albumins.

Novel Sulfamethoxazole Ureas and Oxalamide as Potential Antimycobacterial Agents

Infections caused by Mycobacterium tuberculosis (Mtb.) and nontuberculous mycobacteria (NTM) are considered to be a global health problem; current therapeutic options are limited. Sulfonamides have exhibited a wide range of biological activities including those against mycobacteria. Based on the activity of 4-(3-heptylureido)-N-(5-methylisoxazol-3-yl)benzenesulfonamide against NTM, we designed a series of homologous sulfamethoxazole-based n-alkyl ureas (C₁–C₁₂), as well as several related ureas and an oxalamide. Fifteen ureas and one oxalamide were synthesized by five synthetic procedures and characterized. They were screened for their activity against Mtb. and three NTM strains (M. avium, M. kansasii). All of them share antimycobacterial properties with minimum inhibitory concentration (MIC) values starting from 2 µM. The highest activity showed 4,4′-[carbonylbis(azanediyl)]bis[N-(5-methylisoxazol-3-yl)benzenesulfonamide] with MIC of 2–62.5 µM (i.e., 1.07–33.28 µg/mL). Among n-alkyl ureas, methyl group is optimal for the inhibition of both Mtb. and NTM. Generally, longer alkyls led to increased MIC values, heptyl being an exception for NTM. Some of the novel derivatives are superior to parent sulfamethoxazole. Several urea and oxalamide derivatives are promising antimycobacterial agents with low micromolar MIC values.