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1.
Int J Mol Sci ; 25(9)2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38731815

RESUMEN

The development of novel natural product-derived nano-pesticide systems with loading capacity and sustained releasing performance of bioactive compounds is considered an effective and promising plant protection strategy. In this work, 25 L-carvone-based thiazolinone-hydrazone compounds 4a~4y were synthesized by the multi-step modification of L-carvone and structurally confirmed. Compound 4h was found to show favorable and broad-spectrum antifungal activity through the in vitro antifungal activity evaluation of compounds 4a~4y against eight phytopathogenic fungi. Thus, it could serve as a leading compound for new antifungal agents in agriculture. Moreover, the L-carvone-based nanochitosan carrier 7 bearing the 1,3,4-thiadiazole-amide group was rationally designed for the loading and sustained releasing applications of compound 4h, synthesized, and characterized. It was proven that carrier 7 had good thermal stability below 200 °C, dispersed well in the aqueous phase to form numerous nanoparticles with a size of~20 nm, and exhibited an unconsolidated and multi-aperture micro-structure. Finally, L-carvone-based thiazolinone-hydrazone/nanochitosan complexes were fabricated and investigated for their sustained releasing behaviors. Among them, complex 7/4h-2 with a well-distributed, compact, and columnar micro-structure displayed the highest encapsulation efficiency and desirable sustained releasing property for compound 4h and thus showed great potential as an antifungal nano-pesticide for further studies.


Asunto(s)
Antifúngicos , Quitosano , Monoterpenos Ciclohexánicos , Hidrazonas , Nanopartículas , Quitosano/química , Antifúngicos/farmacología , Antifúngicos/química , Antifúngicos/síntesis química , Hidrazonas/química , Hidrazonas/farmacología , Hidrazonas/síntesis química , Nanopartículas/química , Monoterpenos Ciclohexánicos/química , Enfermedades de las Plantas/microbiología , Enfermedades de las Plantas/prevención & control , Preparaciones de Acción Retardada , Pruebas de Sensibilidad Microbiana , Portadores de Fármacos/química
2.
Int J Mol Sci ; 25(9)2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38731825

RESUMEN

Aminopyrazoles represent interesting structures in medicinal chemistry, and several derivatives showed biological activity in different therapeutic areas. Previously reported 5-aminopyrazolyl acylhydrazones and amides showed relevant antioxidant and anti-inflammatory activities. To further extend the structure-activity relationships in this class of derivatives, a novel series of pyrazolyl acylhydrazones and amides was designed and prepared through a divergent approach. The novel compounds shared the phenylamino pyrazole nucleus that was differently decorated at positions 1, 3, and 4. The antiproliferative, antiaggregating, and antioxidant properties of the obtained derivatives 10-22 were evaluated in in vitro assays. Derivative 11a showed relevant antitumor properties against selected tumor cell lines (namely, HeLa, MCF7, SKOV3, and SKMEL28) with micromolar IC50 values. In the platelet assay, selected pyrazoles showed higher antioxidant and ROS formation inhibition activity than the reference drugs acetylsalicylic acid and N-acetylcysteine. Furthermore, in vitro radical scavenging screening confirmed the good antioxidant properties of acylhydrazone molecules. Overall, the collected data allowed us to extend the structure-activity relationships of the previously reported compounds and confirmed the pharmaceutical attractiveness of this class of aminopyrazole derivatives.


Asunto(s)
Amidas , Antineoplásicos , Antioxidantes , Proliferación Celular , Hidrazonas , Pirazoles , Humanos , Pirazoles/química , Pirazoles/farmacología , Hidrazonas/química , Hidrazonas/farmacología , Hidrazonas/síntesis química , Antioxidantes/farmacología , Antioxidantes/química , Relación Estructura-Actividad , Antineoplásicos/farmacología , Antineoplásicos/química , Proliferación Celular/efectos de los fármacos , Amidas/química , Amidas/farmacología , Línea Celular Tumoral , Especies Reactivas de Oxígeno/metabolismo , Células MCF-7 , Células HeLa
3.
J Inorg Biochem ; 256: 112546, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38593611

RESUMEN

Two copper(II) complexes [Cu(Hpmoh)(NO3)(NCS)] (1) and [Cu(peoh)(N3)]2 (2) were designed and synthesized by reaction of Cu(NO3)2·3H2O with hydrazone Schiff base ligands,abbreviated with Hpmoh and Hpeoh. Hpmoh and Hpeoh were prepared by condensation reaction of octanoic hydrazide with pyridine-2-carboxyaldehyde and 2-acetylpyridine, respectively. Complexes 1 and 2 were characterized using different analytical techniques such as FT-IR, UV-Vis, IR, EPR and single X-ray diffraction (XRD) analyses as well as computational methods (DFT). The XRD of 1 and 2 shows a mononuclear or a dinuclear structure with the copper(II) centre adopting a slightly distorted square pyramidal geometry. In water-containing solution and in DMSO, 1 and 2 undergo a partial transformation with formation of [Cu(Hpmoh)(NO3)(NCS)] (1) and [Cu(Hpmoh)(NO3)(H2O/DMSO)] (1a) in one system and [Cu(peoh)(N3)] (2a) in the other one, as supported by DFT calculations. Docking simulations confirmed that the intercalation is the preferred binding mode with DNA for 1, 1a and 2a, but suggested that the minor groove binding is also possible. A significant fluorescence quenching of the DNA-ethidium bromide conjugate was observed upon the addition of complexes 1 and 2 with a quenching constant around 104 M-1 s-1. Finally, both 1 and 2 were examined for anti-cancer activity using MDA-MB-231 (human breast adenocarcinoma) and A375 (malignant melanoma) cell lines through in vitro MTT assay which suggest comparable cancer cell killing efficacy, with the higher effectiveness of 2 due to the dissociation into two [Cu(peoh)(N3)] units.


Asunto(s)
Antineoplásicos , Complejos de Coordinación , Cobre , ADN , Cobre/química , ADN/química , Humanos , Complejos de Coordinación/farmacología , Complejos de Coordinación/química , Complejos de Coordinación/síntesis química , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Ligandos , Hidrazinas/química , Hidrazinas/farmacología , Línea Celular Tumoral , Piridinas/química , Piridinas/farmacología , Simulación del Acoplamiento Molecular , Hidrazonas/química , Hidrazonas/farmacología , Hidrazonas/síntesis química
4.
J Inorg Biochem ; 256: 112550, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38599004

RESUMEN

Cisplatin remains the most widely used chemotherapeutic agent in cancer treatment; however, its inherent drawbacks have fueled the development of novel metalloanticancer drugs. In this study, two novel Cu(II) complexes (Cu1 and Cu2) were designed and synthesized. Notably, these Cu(II) complexes showed higher cytotoxicity against HL-7402 cells than cisplatin. Moreover, Cu(II) complexes significantly inhibited liver cancer growth in a xenograft model. A mechanism study revealed that the Cu(II) complexes reduced the mitochondrial membrane potential of cancer cells, produced excessive reactive oxygen species (ROS), induced mitochondrial DNA (mtDNA) damage, and ultimately facilitated cancer cell apoptosis.


Asunto(s)
Antineoplásicos , Apoptosis , Complejos de Coordinación , Cobre , Daño del ADN , ADN Mitocondrial , Neoplasias Hepáticas , Mitocondrias , Especies Reactivas de Oxígeno , Humanos , Cobre/química , Cobre/farmacología , Apoptosis/efectos de los fármacos , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/metabolismo , Animales , Daño del ADN/efectos de los fármacos , Complejos de Coordinación/farmacología , Complejos de Coordinación/química , Complejos de Coordinación/síntesis química , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Ratones , Mitocondrias/efectos de los fármacos , Mitocondrias/metabolismo , ADN Mitocondrial/metabolismo , ADN Mitocondrial/genética , Especies Reactivas de Oxígeno/metabolismo , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Línea Celular Tumoral , Hidrazonas/farmacología , Hidrazonas/química , Hidrazonas/síntesis química , Ensayos Antitumor por Modelo de Xenoinjerto , Ratones Desnudos , Ratones Endogámicos BALB C
5.
Bioorg Med Chem Lett ; 105: 129743, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38608962

RESUMEN

Neuraminidase (NA) serves as a promising target for the exploration and development of anti-influenza drugs. In this work, lead compound 5 was discovered through pharmacophore-based virtual screening and molecular dynamics simulation, and 14 new compounds were obtained by modifying the lead compound 5 based on pharmacophore features. The biological activity test shows that 5n (IC50 = 0.13 µM) has a better inhibitory effect on wild-type NA (H5N1), while 5i (IC50 = 0.44 µM) has a prominent inhibitory effect on mutant NA (H5N1-H274Y), both of them are better than the positive control oseltamivir carboxylate (OSC). The analysis of docking results indicate that the good activities of compounds 5n and 5i may be attributed to the thiophene ring in 5n can stretch into the 150-cavity of NA, whereas the thiophene moiety in 5i can extend to the 430-cavity of NA. The findings of this study may be helpful for the discovery of new NA inhibitors.


Asunto(s)
Antivirales , Inhibidores Enzimáticos , Neuraminidasa , Neuraminidasa/antagonistas & inhibidores , Neuraminidasa/metabolismo , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/farmacología , Inhibidores Enzimáticos/química , Antivirales/farmacología , Antivirales/síntesis química , Antivirales/química , Relación Estructura-Actividad , Hidrazonas/química , Hidrazonas/farmacología , Hidrazonas/síntesis química , Subtipo H5N1 del Virus de la Influenza A/efectos de los fármacos , Subtipo H5N1 del Virus de la Influenza A/enzimología , Descubrimiento de Drogas , Simulación del Acoplamiento Molecular , Estructura Molecular , Humanos , Simulación de Dinámica Molecular , Relación Dosis-Respuesta a Droga
6.
Chem Pharm Bull (Tokyo) ; 72(4): 413-420, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38684408

RESUMEN

A diazo-, metal-, and base-free multi-substituted hydrazone synthesis via a formal reductive N-H bond insertion reactions of hydrazones to α-keto esters has been developed. The protocol features a broad substrate scope and good functional group tolerance, providing N-H bond insertion products in moderate to excellent yields. Moreover, P(III)-mediated N-H functionalization of pharmaceutical containing hydrazone moiety was also successfully achieved.


Asunto(s)
Ésteres , Hidrazonas , Hidrazonas/química , Hidrazonas/síntesis química , Ésteres/química , Ésteres/síntesis química , Estructura Molecular , Oxidación-Reducción , Cetonas/química , Cetonas/síntesis química , Catálisis
7.
Chem Biodivers ; 21(5): e202400355, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38453645

RESUMEN

In an attempt to search for new natural products-based antifungal agents, fifty-three nootkatone derivatives were designed, synthesized, and evaluated for their antifungal activity against Phytophthora parasitica var nicotianae, Fusarium oxysporum, Fusarium graminearum and Phomopsis sp. by the mycelium growth rate method. Nootkatone derivatives N17 exhibited good inhibitory activity against Phomopsis. sp. with EC50 values of 2.02 µM. The control effect of N17 against Phomopsis. sp. on kiwifruit showed that N17 exhibited a good curative effect in reducing kiwifruit rot at the concentration of 202 µM(100×EC50 ), with the curative effect of 41.11 %, which was better than commercial control of pyrimethanil at the concentration of 13437 µM(100×EC50 ) with the curative effect of 38.65 %. Phomopsis. sp. mycelium treated with N17 showed irregular surface collapse and shrinkage, and the cell membrane crinkled irregularly, vacuoles expanded significantly, mitochondria contracted, and organelles partially swollen by the SEM and TEM detected. Preliminary pharmacological experiments show that N17 exerted antifungal effects by altering release of cellular contents, and altering cell membrane permeability and integrity. The cytotoxicity test demonstrated that N17 showed almost no toxicity to K562 cells. The presented results implied that N17 may be as a potential antifungal agents for developing more efficient fungicides to control Phomopsis sp.


Asunto(s)
Antifúngicos , Diseño de Fármacos , Fusarium , Pruebas de Sensibilidad Microbiana , Oximas , Antifúngicos/farmacología , Antifúngicos/síntesis química , Antifúngicos/química , Fusarium/efectos de los fármacos , Oximas/química , Oximas/farmacología , Oximas/síntesis química , Relación Estructura-Actividad , Hidrazonas/farmacología , Hidrazonas/química , Hidrazonas/síntesis química , Phytophthora/efectos de los fármacos , Estructura Molecular , Sesquiterpenos Policíclicos/farmacología , Sesquiterpenos Policíclicos/química , Sesquiterpenos Policíclicos/síntesis química , Relación Dosis-Respuesta a Droga , Ascomicetos/efectos de los fármacos
8.
Arch Pharm (Weinheim) ; 357(5): e2300725, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38346258

RESUMEN

Over the years, pharmacological agents bearing antioxidant merits arose as beneficial in the prophylaxis and treatment of various health conditions. Hazardous effects of radical species hyperproduction disrupt normal cell functioning, thus increasing the possibility for the development of various oxidative stress-associated disorders, such as cancer. Contributing to the efforts for efficient antioxidant drug discovery, a thorough in vitro and in silico assessment of antioxidant properties of 14 newly synthesized N-pyrocatechoyl and N-pyrogalloyl hydrazones (N-PYRs) was accomplished. All compounds exhibited excellent antioxidant potency against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical. The extensive in silico analysis revealed multiple favorable features of N-PYRs to inactivate harmful radical species, which supported the obtained in vitro results. Also, in silico experiments provided insights into the preferable antioxidant pathways. Prompted by these findings, the cytotoxicity effects and the influence on the redox status of cancer HCT-116 cells and healthy fibroblasts MRC-5 were evaluated. These investigations exposed four analogs exhibiting both cytotoxicity and selectivity toward cancer cells. Furthermore, the frequently uncovered antimicrobial potency of hydrazone-type hybrids encouraged investigations on G+ and G- bacterial strains, which revealed the antibacterial potency of several N-PYRs. These findings highlighted the N-PYRs as excellent antioxidant agents endowed with cytotoxic and antibacterial features.


Asunto(s)
Antibacterianos , Antineoplásicos , Antioxidantes , Hidrazonas , Pruebas de Sensibilidad Microbiana , Humanos , Hidrazonas/farmacología , Hidrazonas/química , Hidrazonas/síntesis química , Antioxidantes/farmacología , Antioxidantes/síntesis química , Antioxidantes/química , Antibacterianos/farmacología , Antibacterianos/síntesis química , Antibacterianos/química , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Relación Estructura-Actividad , Células HCT116 , Estructura Molecular , Supervivencia Celular/efectos de los fármacos , Picratos/antagonistas & inhibidores , Compuestos de Bifenilo/antagonistas & inhibidores , Compuestos de Bifenilo/química , Compuestos de Bifenilo/farmacología , Relación Dosis-Respuesta a Droga
9.
Curr Pharm Des ; 30(5): 333-351, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38303528

RESUMEN

Due to its important biological and pharmacological properties, in the field of medicinal chemistry and drug discovery, the N-acylhydrazone motif has shown to be extremely adaptable and promising. This scaffold has become a crucial component in the synthesis of numerous bioactive agents. N-Acylhydrazones are also interesting biological and synthetic tools due to their easy and straightforward synthesis. The current review provides a summary of the analgesic and anti-inflammatory activities of N-acylhydrazone derivatives over the past ten years. A brief discussion of structure-activity relationships is also provided which may guide researchers in medicinal chemistry to develop derivatives based on N-acylhydrazone scaffold as potent anti-inflammatory candidates.


Asunto(s)
Analgésicos , Hidrazonas , Hidrazonas/farmacología , Hidrazonas/química , Hidrazonas/síntesis química , Hidrazonas/uso terapéutico , Humanos , Analgésicos/farmacología , Analgésicos/química , Analgésicos/síntesis química , Animales , Antiinflamatorios no Esteroideos/farmacología , Antiinflamatorios no Esteroideos/química , Antiinflamatorios no Esteroideos/síntesis química , Estructura Molecular , Relación Estructura-Actividad , Antiinflamatorios/farmacología , Antiinflamatorios/química , Antiinflamatorios/síntesis química , Dolor/tratamiento farmacológico , Farmacóforo
10.
Molecules ; 28(14)2023 Jul 18.
Artículo en Inglés | MEDLINE | ID: mdl-37513351

RESUMEN

Secure and efficient treatment of diverse pain and inflammatory disorders is continually challenging. Although NSAIDs and other painkillers are well-known and commonly available, they are sometimes insufficient and can cause dangerous adverse effects. As yet reported, derivatives of pyrrolo[3,4-d]pyridazinone are potent COX-2 inhibitors with a COX-2/COX-1 selectivity index better than meloxicam. Considering that N-acylhydrazone (NAH) moiety is a privileged structure occurring in many promising drug candidates, we decided to introduce this pharmacophore into new series of pyrrolo[3,4-d]pyridazinone derivatives. The current paper presents the synthesis and in vitro, spectroscopic, and in silico studies evaluating the biological and physicochemical properties of NAH derivatives of pyrrolo[3,4-d]pyridazinone. Novel compounds 5a-c-7a-c were received with high purity and good yields and did not show cytotoxicity in the MTT assay. Their COX-1, COX-2, and 15-LOX inhibitory activities were estimated using enzymatic tests and molecular docking studies. The title N-acylhydrazones appeared to be promising dual COX/LOX inhibitors. Moreover, spectroscopic and computational methods revealed that new compounds form stable complexes with the most abundant plasma proteins-AAG and HSA, but do not destabilize their secondary structure. Additionally, predicted pharmacokinetic and drug-likeness properties of investigated molecules suggest their potentially good membrane permeability and satisfactory bioavailability.


Asunto(s)
Inhibidores de la Ciclooxigenasa , Hidrazonas , Inhibidores de la Lipooxigenasa , Piridazinas , Pirroles , Hidrazonas/síntesis química , Hidrazonas/química , Hidrazonas/farmacocinética , Hidrazonas/farmacología , Inhibidores de la Ciclooxigenasa/síntesis química , Inhibidores de la Ciclooxigenasa/química , Inhibidores de la Ciclooxigenasa/farmacocinética , Inhibidores de la Ciclooxigenasa/farmacología , Piridazinas/síntesis química , Piridazinas/química , Piridazinas/farmacocinética , Piridazinas/farmacología , Pirroles/síntesis química , Pirroles/química , Pirroles/farmacocinética , Pirroles/farmacología , Humanos , Fibroblastos , Simulación por Computador , Permeabilidad de la Membrana Celular , Línea Celular
11.
Life Sci ; 295: 120380, 2022 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-35143825

RESUMEN

AIMS: the main purpose of this study was to identify new selective antitumor agents. MAIN METHODS: several hydrazonoyl chlorides (HCs) were synthesized and human tumor cell line viability was determined using the MTT assay. Tumor development was assessed using Ehrlich ascites carcinoma (EAC)-bearing mice. KEY FINDINGS: our results showed that 2-oxo-N-phenyl-2-(phenylamino)acetohydrazonoyl chloride (compound 4; CPD 4) and 2-oxo-2-(phenylamino)-N-(p-tolyl)acetohydrazonoyl chloride (CPD 5) were the most cytotoxic HCs to human cervical tumor HeLa (IC50: 20 and 25 µM for CPD 4 and 5 respectively), breast MCF7 (IC50: 29 and 34 µM for CPD 4 and 5 respectively) and colon HCT116 cancer cells (IC50: 26 and 25 µM for CPD 4 and 5 respectively) with the least cytotoxicity to human non-tumor CCD-18Co colon fibroblasts as well as murine splenocytes. The active compounds significantly inhibited colony formation as well as tumor development in EAC-bearing mice. We also observed that PTEN-deficient cells displayed greater sensitivity than cells expressing wild type PTEN. At the molecular level, comet and cell cycle analyses indicated that the active compounds generate DNA damage. In light of the PTEN-dependent sensitivity and genomic instability we examined the influence of HCs on the DNA repair enzyme polynucleotide kinase/phosphatase (PNKP) and the PI3K/AKT/mTOR pathway, which are each known to be synthetic lethal with PTEN. We found that both PNKP and the PI3K/AKT/mTOR pathway to be adversely affected by the HCs, which may partially account for their toxicity. SIGNIFICANCE: hydrazonoyl chlorides can be considered as hit compounds for the development of new antitumor agents.


Asunto(s)
Antineoplásicos/síntesis química , Hidrazonas/síntesis química , Hidrazonas/farmacología , Animales , Antineoplásicos/farmacología , Apoptosis/efectos de los fármacos , Línea Celular Tumoral/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Cloruros/química , Cloruros/farmacología , Enzimas Reparadoras del ADN/metabolismo , Ensayos de Selección de Medicamentos Antitumorales/métodos , Femenino , Humanos , Hidrazonas/química , Masculino , Ratones , Ratones Endogámicos BALB C , Fosfohidrolasa PTEN/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Fosfotransferasas (Aceptor de Grupo Alcohol)/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Transducción de Señal/efectos de los fármacos , Serina-Treonina Quinasas TOR/metabolismo
12.
Int J Mol Sci ; 23(3)2022 Jan 18.
Artículo en Inglés | MEDLINE | ID: mdl-35162960

RESUMEN

Inhibition of the human O-linked ß-N-acetylglucosaminidase (hOGA, GH84) enzyme is pharmacologically relevant in several diseases such as neurodegenerative and cardiovascular disorders, type 2 diabetes, and cancer. Human lysosomal hexosaminidases (hHexA and hHexB, GH20) are mechanistically related enzymes; therefore, selective inhibition of these enzymes is crucial in terms of potential applications. In order to extend the structure-activity relationships of OGA inhibitors, a series of 2-acetamido-2-deoxy-d-glucono-1,5-lactone sulfonylhydrazones was prepared from d-glucosamine. The synthetic sequence involved condensation of N-acetyl-3,4,6-tri-O-acetyl-d-glucosamine with arenesulfonylhydrazines, followed by MnO2 oxidation to the corresponding glucono-1,5-lactone sulfonylhydrazones. Removal of the O-acetyl protecting groups by NH3/MeOH furnished the test compounds. Evaluation of these compounds by enzyme kinetic methods against hOGA and hHexB revealed potent nanomolar competitive inhibition of both enzymes, with no significant selectivity towards either. The most efficient inhibitor of hOGA was 2-acetamido-2-deoxy-d-glucono-1,5-lactone 1-naphthalenesulfonylhydrazone (5f, Ki = 27 nM). This compound had a Ki of 6.8 nM towards hHexB. To assess the binding mode of these inhibitors to hOGA, computational studies (Prime protein-ligand refinement and QM/MM optimizations) were performed, which suggested the binding preference of the glucono-1,5-lactone sulfonylhydrazones in an s-cis conformation for all test compounds.


Asunto(s)
Antígenos de Neoplasias/química , Histona Acetiltransferasas/química , Hialuronoglucosaminidasa/química , Hidrazonas/síntesis química , Lactonas/química , Cadena beta de beta-Hexosaminidasa/química , Antígenos de Neoplasias/metabolismo , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Histona Acetiltransferasas/metabolismo , Humanos , Hialuronoglucosaminidasa/metabolismo , Hidrazonas/química , Hidrazonas/farmacología , Compuestos de Manganeso/química , Modelos Moleculares , Conformación Molecular , Óxidos/química , Relación Estructura-Actividad , Cadena beta de beta-Hexosaminidasa/metabolismo
13.
J Am Chem Soc ; 144(4): 1622-1633, 2022 02 02.
Artículo en Inglés | MEDLINE | ID: mdl-35060699

RESUMEN

Naturally occurring hydrazones are rare despite the ubiquitous usage of synthetic hydrazones in the preparation of organic compounds and functional materials. In this study, we discovered a family of novel microbial metabolites (tasikamides) that share a unique cyclic pentapeptide scaffold. Surprisingly, tasikamides A-C (1-3) contain a hydrazone group (C═N─N) that joins the cyclic peptide scaffold to an alkyl 5-hydroxylanthranilate (AHA) moiety. We discovered that the biosynthesis of 1-3 requires two discrete gene clusters, with one encoding a nonribosomal peptide synthetase (NRPS) pathway for assembling the cyclic peptide scaffold and another encoding the AHA-synthesizing pathway. The AHA gene cluster encodes three ancillary enzymes that catalyze the diazotization of AHA to yield an aryl diazonium species (diazo-AHA). The electrophilic diazo-AHA undergoes nonenzymatic Japp-Klingemann coupling with a ß-keto aldehyde-containing cyclic peptide precursor to furnish the hydrazone group and yield 1-3. The studies together unraveled a novel mechanism whereby specialized metabolites are formed by the coupling of two biosynthetic pathways via an unprecedented in vivo Japp-Klingemann reaction. The findings raise the prospect of exploiting the arylamine-diazotizing enzymes (AAD) for the in vivo synthesis of aryl compounds and modification of biological macromolecules.


Asunto(s)
Compuestos de Diazonio/química , Hidrazonas/química , Oligopéptidos/biosíntesis , Vías Biosintéticas/genética , Hidrazonas/síntesis química , Familia de Multigenes , Oligopéptidos/química , Péptido Sintasas/genética , Péptido Sintasas/metabolismo , Péptidos Cíclicos/biosíntesis , Péptidos Cíclicos/química , Streptomyces/metabolismo
14.
Eur J Med Chem ; 229: 114097, 2022 Feb 05.
Artículo en Inglés | MEDLINE | ID: mdl-34998057

RESUMEN

The inhibitory effects of 2-thiazolyl hydrazones on monoamine oxidase enzymes are known for a long time. In this study, a new series of 2-thiazolyl hydrazone derivatives were synthesized starting from 6-methoxy-2-naphthaldehyde. All of the synthesized compounds were investigated in terms of their monoamine oxidase (MAO) inhibitory effects and significant results were found. The results showed that compound 2j potently inhibited MAO-A and MAO-B, while compound 2t strongly and selectively inhibited MAO-B compared to standard drugs. Compounds 2k and 2q exhibited selective and satisfying inhibition on MAO-B. In the aromatase inhibition studies of the compounds, it was determined that compounds 2q and 2u had high inhibitory properties. Molecular docking studies on MAO-A, MAO-B, and aromatase enzymes were carried out for the aforementioned compounds. Additionally, molecular dynamics simulation was studied for compound 2q on MAO-B and aromatase complexes. Finally, the Field-based QSAR study was developed and the structure-activity relationship (SAR) was explained. For the first time, dual inhibitors on MAO and aromatase enzyme were investigated together. The aim of this approach is for finding the potential agents that do not cause the cognitive disorders and may even treat neurodegenerative symptoms, thus, the aim was reached successfully.


Asunto(s)
Inhibidores de la Aromatasa/síntesis química , Aromatasa/metabolismo , Hidrazonas/síntesis química , Inhibidores de la Monoaminooxidasa/síntesis química , Monoaminooxidasa/metabolismo , Inhibidores de la Aromatasa/farmacología , Evaluación Preclínica de Medicamentos , Humanos , Hidrazonas/farmacología , Simulación del Acoplamiento Molecular , Inhibidores de la Monoaminooxidasa/farmacología , Unión Proteica , Conformación Proteica , Relación Estructura-Actividad
15.
Bioorg Med Chem Lett ; 58: 128522, 2022 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-34974111

RESUMEN

Novel hydrazone derivatives 10a-m were prepared from N-Amino-11-azaartemisinin (9) and screened for their antimalarial activity by oral and intramuscular (i.m.) routes against multidrug-resistant Plasmodium yoelii in Swiss mice model. Several of the hydrazone derivatives showed higher order of antimalarial activity. Compounds 10b, 10g, 10m provided 100% protection to the infected mice at the dose of 24 mg/kg × 4 days via oral route. Fluorenone based hydrazone 10m the most active compound of the series, provided 100% protection at the dose of 6 mg/kg × 4 days via intramuscular route and also provided 100% protection at the dose of 12 mg/kg × 4 days via oral route. While artemisinin gave 100% protection at 48 mg/kg × 4 days and only 60% protection at 24 mg/kg × 4 days via intramuscular (i.m.) route. Compound 10m found to be four-fold more active than artemisinin via intramuscular route.


Asunto(s)
Antimaláricos/farmacología , Artemisininas/farmacología , Hidrazonas/farmacología , Malaria/tratamiento farmacológico , Plasmodium yoelii/efectos de los fármacos , Animales , Antimaláricos/síntesis química , Antimaláricos/química , Artemisininas/química , Relación Dosis-Respuesta a Droga , Resistencia a Múltiples Medicamentos/efectos de los fármacos , Hidrazonas/síntesis química , Hidrazonas/química , Malaria/parasitología , Ratones , Estructura Molecular , Relación Estructura-Actividad
16.
ChemMedChem ; 17(1): e202100559, 2022 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-34637598

RESUMEN

Using ligand-based design strategy, a set of isatin-3-carbohydrazones was designed, synthesized and evaluated for dual fatty acid amide hydrolase (FAAH) and monoacylglycerol lipase (MAGL) inhibition properties. Compound 5-chloro-N'-(5-chloro-2-oxoindolin-3-ylidene)-2-hydroxybenzohydrazide (13 b) emerged as a potent MAGL inhibitor with nanomolar activity (IC50 =3.33 nM), while compound 5-chloro-N'-(1-(4-fluorobenzyl)-2-oxoindolin-3-ylidene)-2-hydroxybenzohydrazide (13 j) was the most potent selective FAAH inhibitor (IC50 =37 nM). Compound 5-chloro-N'-(6-chloro-2-oxoindolin-3-ylidene)-2-hydroxybenzohydrazide (13 c) showed dual FAAH-MAGL inhibitory activity with an IC50 of 31 and 29 nM respectively. Enzyme kinetics studies revealed that the isatin-based carbohydrazones are reversible inhibitors for both FAAH and MAGL. Further, blood-brain permeability assay confirmed that the lead compounds (13 b, 13 c, 13 g, 13 m and 13 q) are suitable as CNS candidates. Molecular dynamics simulation studies revealed the putative binding modes and key interactions of lead inhibitors within the enzyme active sites. The lead dual FAAH-MAGL inhibitor 13 c showed significant antioxidant activity and neuroprotection in the cell-based cytotoxicity assay. In summary, the study yielded three potent FAAH/MAGL inhibitor compounds (13 b, 13 c and 13 j) with acceptable pharmacokinetic profile and thus can be considered as promising candidates for treating neurological and mood disorders.


Asunto(s)
Amidohidrolasas/antagonistas & inhibidores , Antioxidantes/farmacología , Inhibidores Enzimáticos/farmacología , Hidrazonas/farmacología , Isatina/farmacología , Monoacilglicerol Lipasas/antagonistas & inhibidores , Amidohidrolasas/metabolismo , Antioxidantes/síntesis química , Antioxidantes/química , Compuestos de Bifenilo/antagonistas & inhibidores , Línea Celular Tumoral , Relación Dosis-Respuesta a Droga , Descubrimiento de Drogas , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Humanos , Hidrazonas/síntesis química , Hidrazonas/química , Isatina/química , Modelos Moleculares , Estructura Molecular , Monoacilglicerol Lipasas/metabolismo , Picratos/antagonistas & inhibidores , Relación Estructura-Actividad
17.
J Enzyme Inhib Med Chem ; 37(1): 287-298, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34894959

RESUMEN

We synthesised and screened 18 aromatic derivatives of guanylhydrazones and oximes aromatic for their capacity to bind to dengue virus capsid protein (DENVC). The intended therapeutic target was the hydrophobic cleft of DENVC, which is a region responsible for its anchoring in lipid droplets in the infected cells. The inhibition of this process completely suppresses virus infectivity. Using NMR, we describe five compounds able to bind to the α1-α2 interface in the hydrophobic cleft. Saturation transfer difference experiments showed that the aromatic protons of the ligands are important for the interaction with DENVC. Fluorescence binding isotherms indicated that the selected compounds bind at micromolar affinities, possibly leading to binding-induced conformational changes. NMR-derived docking calculations of ligands showed that they position similarly in the hydrophobic cleft. Cytotoxicity experiments and calculations of in silico drug properties suggest that these compounds may be promising candidates in the search for antivirals targeting DENVC.


Asunto(s)
Antivirales/farmacología , Proteínas de la Cápside/antagonistas & inhibidores , Virus del Dengue/efectos de los fármacos , Hidrazonas/farmacología , Oximas/farmacología , Antivirales/síntesis química , Antivirales/química , Proteínas de la Cápside/metabolismo , Virus del Dengue/metabolismo , Relación Dosis-Respuesta a Droga , Hidrazonas/síntesis química , Hidrazonas/química , Interacciones Hidrofóbicas e Hidrofílicas , Pruebas de Sensibilidad Microbiana , Estructura Molecular , Oximas/síntesis química , Oximas/química , Relación Estructura-Actividad
18.
Bioorg Chem ; 119: 105520, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-34864280

RESUMEN

In this study, the concept of dynamic combinatorial chemistry (DCC) was applied to explore novel cholesterol esterase (CEase) inhibitors. In the presence of enzyme, two substrates (A1H3 and A2H3) were amplified from the dynamic combinatorial library (DCL), which was generated through reversible acylhydrazone formation reaction. In the in vitro biological evaluation, compound A1H3 exhibited not only potent (IC50 in nanomolar range) but also selective inhibition (>120 folds of selectivity for CEase over AChE). Furthermore, the binding pattern and possible binding mechanism were investigated in the kinetic experiment and molecular docking study, respectively.


Asunto(s)
Inhibidores Enzimáticos/farmacología , Hidrazonas/farmacología , Esterol Esterasa/antagonistas & inhibidores , Relación Dosis-Respuesta a Droga , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Humanos , Hidrazonas/síntesis química , Hidrazonas/química , Estructura Molecular , Esterol Esterasa/metabolismo , Relación Estructura-Actividad
19.
Bioorg Med Chem Lett ; 59: 128516, 2022 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-34958890

RESUMEN

The paper reports on the facile and convenient synthesis of a series of novel 2,5-substituted 1,3,4-oxadiazoles 3a-f and that of aroylhydrazone-based molecular hybrids 5a-g from readily available starting materials. The structure of the compounds was confirmed by IR, 1H NMR, 13C NMR and HRESI-MS spectral data. The toxicological potential of the compounds was evaluated by monitoring the synaptosomal viability and the levels of reduced glutathione in rat brain synaptosomes, isolated by Percoll gradient. The neuroprotective effects were assessed in vitro in a model of 6-hydroxydopamine-induced neurotoxicity. Administered alone, at a concentration of 40 µM, most of the 1,3,4-oxadiazole derivatives and all of the hydrazone derivatives exhibited weak statistically significant neurotoxic effects, compared to the control. Two of the compounds from the novel oxadiazoles 3a and 3d did not have any toxicity. In a model of 6-OHDA-induced oxidative stress, again 3a and 3d and all aroylhydrazone derivatives 5a-g revealed statistically significant neuroprotective effect by preserving the synaptosomal viability and the level of reduced glutathione, against the toxic agent. Some of the compounds may have neuroprotective effects due to possible stabilization of the synaptosomal membrane and/or because of the preserved reduced glutathione. Additionally, all the compounds display a good predicted ADME profile.


Asunto(s)
Encéfalo/efectos de los fármacos , Glutatión/antagonistas & inhibidores , Hidrazonas/farmacología , Fármacos Neuroprotectores/farmacología , Oxadiazoles/farmacología , Animales , Encéfalo/metabolismo , Relación Dosis-Respuesta a Droga , Glutatión/metabolismo , Hidrazonas/síntesis química , Hidrazonas/química , Estructura Molecular , Fármacos Neuroprotectores/síntesis química , Fármacos Neuroprotectores/química , Oxadiazoles/síntesis química , Oxadiazoles/química , Ratas , Relación Estructura-Actividad
20.
Acta Chim Slov ; 68(3): 567-574, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34897529

RESUMEN

A series of three new hydrazone compounds derived from the condensation reactions of 4-dimethylaminobenzohydrazide with 4-dimethylaminobenzaldehyde, 2-chloro-5-nitrobenzaldehyde and 3-methoxybenzaldehyde, respectively, were prepared. The compounds were characterized by elemental analysis, infrared and UV-vis spectra, HRMS, 1H NMR and 13C NMR spectra, and single crystal X-ray diffraction. Crystals of the compounds are stabilized by hydrogen bonds. The compounds were assayed for antibacterial (Bacillus subtilis, Escherichia coli, Pseudomonas fluorescence and Staphylococcus aureus) and antifungal (Aspergillus niger and Candida albicans) activities by MTT method. The results indicated that compound 2 is an effective antibacterial material.


Asunto(s)
Antibacterianos/farmacología , Benzamidas/farmacología , Hidrazonas/farmacología , para-Aminobenzoatos/farmacología , Antibacterianos/síntesis química , Bacterias/efectos de los fármacos , Benzamidas/síntesis química , Hidrazonas/síntesis química , Pruebas de Sensibilidad Microbiana , Estructura Molecular , Relación Estructura-Actividad , para-Aminobenzoatos/síntesis química
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