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1.
Sci Rep ; 14(1): 7746, 2024 04 02.
Artigo em Inglês | MEDLINE | ID: mdl-38565861

RESUMO

Diabetes Mellitus is a metabolic disease characterized by elevated blood sugar levels caused by inadequate insulin production, which subsequently leads to hyperglycemia. This study was aimed to investigate the antidiabetic potential of pyrazolobenzothiazine derivatives in silico, in vitro, and in vivo. Molecular docking of pyrazolobenzothiazine derivatives was performed against α-glucosidase and α-amylase and compounds were selected based on docking score, bonding interactions and low root mean square deviation (RMSD). Enzyme inhibition assay against α-glucosidase and α-amylase was performed in vitro using p-nitrophenyl-α-D-glucopyranoside (PNPG) and starch substrate. Synthetic compound pyrazolobenzothiazine (S1) exhibited minimal conformational changes during the 100 ns MD simulation run. S1 also revealed effective IC50 values for α-glucosidase (3.91 µM) and α-amylase (8.89 µM) and an enzyme kinetic study showed low ki (- 0.186 µM, - 1.267 µM) and ki' (- 0.691 µM, - 1.78 µM) values with the competitive type of inhibition for both enzymes α-glucosidase and α-amylase, respectively. Moreover, studies were conducted to check the effect of the synthetic compound in a mouse model. A low necrosis rate was observed in the liver, kidney, and pancreas through histology analysis performed on mice. Compound S1 also exhibited a good biochemical profile with lower sugar level (110-115 mg/dL), increased insulin level (25-30 µM/L), and low level of cholesterol (85 mg/dL) and creatinine (0.6 mg/dL) in blood. The treated mice group also exhibited a low % of glycated haemoglobin (3%). This study concludes that S1 is a new antidiabetic-agent that helps lower blood glucose levels and minimizes the complications associated with type-II diabetes.


Assuntos
Hiperglicemia , Hipoglicemiantes , Camundongos , Animais , Hipoglicemiantes/farmacologia , Hipoglicemiantes/química , alfa-Glucosidases/metabolismo , Simulação de Acoplamento Molecular , Hiperglicemia/tratamento farmacológico , Insulina , alfa-Amilases/metabolismo , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Relação Estrutura-Atividade
2.
Ultrason Sonochem ; 105: 106865, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38564909

RESUMO

To further enhance the application of nobiletin (an important active ingredient in Citrus fruits), we used ultrasonic homogenization-assisted antisolvent precipitation to create ultrafine particles of nobiletin (UPN). DMSO was used as the solvent, and deionized water was used as the antisolvent. When ultrasonication (670 W) and homogenization (16000 r/min) were synergistic, the solution concentration was 57 mg/mL, and the minimum particle size of UPN was 521.02 nm. The UPN samples outperformed the RN samples in terms of the inhibition of porcine pancreatic lipase, which was inhibited (by 500 mg/mL) by 68.41 % in the raw sample, 90.34 % in the ultrafine sample, and 83.59 % in the positive control, according to the data. Fourier transform infrared spectroscopy analysis revealed no chemical changes in the samples before or after preparation. However, the crystallinity of the processed ultrafine nobiletin particles decreased. Thus, this work offers significant relevance for applications in the realm of food chemistry and indirectly illustrates the expanded application potential of nobiletin.


Assuntos
Flavonas , Lipase , Tamanho da Partícula , Solventes , Lipase/metabolismo , Lipase/antagonistas & inibidores , Animais , Flavonas/química , Flavonas/farmacologia , Suínos , Solventes/química , Pâncreas/enzimologia , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Sonicação , alfa-Glucosidases/metabolismo , Precipitação Química , Inibidores Enzimáticos/farmacologia , Inibidores Enzimáticos/química
3.
Food Chem ; 448: 139182, 2024 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-38569413

RESUMO

Amylosucrase (ASase) efficiently biosynthesizes α-glucoside using flavonoids as acceptor molecules and sucrose as a donor molecule. Here, ASase from Deinococcus wulumuqiensis (DwAS) biosynthesized more naringenin α-glucoside (NαG) with sucrose and naringenin as donor and acceptor molecules, respectively, than other ASases from Deinococcus sp. The biotransformation rate of DwAS to NαG was 21.3% compared to 7.1-16.2% for other ASases. Docking simulations showed that the active site of DwAS was more accessible to naringenin than those of others. The 217th valine in DwAS corresponded to the 221st isoleucine in Deinococcus geothermalis AS (DgAS), and the isoleucine possibly prevented naringenin from accessing the active site. The DwAS-V217I mutant had a significantly lower biosynthetic rate of NαG than DwAS. The kcat/Km value of DwAS with naringenin as the donor was significantly higher than that of DgAS and DwAS-V217I. In addition, NαG inhibited human intestinal α-glucosidase more efficiently than naringenin.


Assuntos
Proteínas de Bactérias , Biotransformação , Deinococcus , Flavanonas , Glucosídeos , Glucosiltransferases , Inibidores de Glicosídeo Hidrolases , Flavanonas/metabolismo , Flavanonas/química , Deinococcus/enzimologia , Deinococcus/metabolismo , Deinococcus/química , Deinococcus/genética , Glucosiltransferases/metabolismo , Glucosiltransferases/química , Glucosiltransferases/genética , Inibidores de Glicosídeo Hidrolases/química , Inibidores de Glicosídeo Hidrolases/metabolismo , Inibidores de Glicosídeo Hidrolases/farmacologia , Proteínas de Bactérias/metabolismo , Proteínas de Bactérias/química , Proteínas de Bactérias/genética , Glucosídeos/metabolismo , Glucosídeos/química , Simulação de Acoplamento Molecular , Cinética , alfa-Glucosidases/metabolismo , alfa-Glucosidases/química
4.
Sci Rep ; 14(1): 7408, 2024 03 28.
Artigo em Inglês | MEDLINE | ID: mdl-38548784

RESUMO

α-Glucosidase inhibitors have emerged as crucial agents in the management of type 2 diabetes mellitus. In the present study, a new series of coumarin-linked 2-phenylbenzimidazole derivatives 5a-m was designed, synthesized, and evaluated as anti-α-glucosidase agents. Among these derivatives, compound 5k (IC50 = 10.8 µM) exhibited a significant inhibitory activity in comparison to the positive control acarbose (IC50 = 750.0 µM). Through kinetic analysis, it was revealed that compound 5k exhibited a competitive inhibition pattern against α-glucosidase. To gain insights into the interactions between the title compounds and α-glucosidase molecular docking was employed. The obtained results highlighted crucial interactions that contribute to the inhibitory activities of the compounds against α-glucosidase. These derivatives show immense potential as promising starting points for developing novel α-glucosidase inhibitors.


Assuntos
Benzimidazóis , Diabetes Mellitus Tipo 2 , Inibidores de Glicosídeo Hidrolases , Humanos , Inibidores de Glicosídeo Hidrolases/farmacologia , Estrutura Molecular , Relação Estrutura-Atividade , Diabetes Mellitus Tipo 2/tratamento farmacológico , alfa-Glucosidases/metabolismo , Simulação de Acoplamento Molecular , Cinética , Cumarínicos/farmacologia
5.
J Med Chem ; 67(7): 5945-5956, 2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38504504

RESUMO

Multivalent glycosidase inhibitors based on 1-deoxynojirimycin derivatives against α-glucosidases have been rapidly developed. Nonetheless, the mechanism based on self-assembled multivalent glucosidase inhibitors in living systems needs to be further studied. It remains to be determined whether the self-assembly possesses sufficient stability to endure transit through the small intestine and subsequently bind to the glycosidases located therein. In this paper, two amphiphilic compounds, 1-deoxynojirimycin and α-peptoid conjugates (LP-4DNJ-3C and LP-4DNJ-6C), were designed. Their self-assembling behaviors, multivalent α-glucosidase inhibition effect, and fluorescence imaging on living organs were studied. LP-4DNJ-6C exhibited better multivalent α-glucosidase inhibition activities in vitro. Moreover, the self-assembly of LP-4DNJ-6C could effectively form a complex with Nile red. The complex showed fluorescence quenching effect upon binding with α-glucosidases and exhibited potent fluorescence imaging in the small intestine. This result suggests that a multivalent hypoglycemic effect achieved through self-assembly in the intestine is a viable approach, enabling the rational design of multivalent hypoglycemic drugs.


Assuntos
1-Desoxinojirimicina , Hipoglicemiantes , Hipoglicemiantes/farmacologia , Hipoglicemiantes/metabolismo , 1-Desoxinojirimicina/farmacologia , alfa-Glucosidases/metabolismo , Inibidores Enzimáticos/farmacologia , Glicosídeo Hidrolases , Inibidores de Glicosídeo Hidrolases/farmacologia
6.
Phytochemistry ; 221: 114066, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38494085

RESUMO

A bichalconoid, globunoid A (1) and three biflavanones, globunoids B-D (2-4), previously undescribed, were isolated from the stems of Knema globularia, along with fourteen known analogues 5-18. The chemical structures of 1-4 were elucidated by the comprehensive spectroscopic analysis including UV, IR, HRESIMS, and NMR; the absolute configurations were determined based on their NOESY data, DP4+ statistical analysis, and ECD calculation. Up to now, compounds 2 and 3 represent the first 3,3″-linked biflavanone structures. Among the isolated compounds, 2, 3, and 2,3-dihydrocalodenin B (6) potently inhibited α-glucosidase and α-amylase activities, with IC50 values in the range 1.1-7.5 µM. Furthermore, the most active compound 6 was found to be a non-competitive inhibitor against these two enzymes.


Assuntos
Plantaginaceae , alfa-Glucosidases , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , alfa-Amilases , Extratos Vegetais/química
7.
Eur J Med Chem ; 269: 116332, 2024 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-38508120

RESUMO

The inhibition of the α-glucosidase enzyme is crucial for targeting type 2 diabetes mellitus (DM). This study introduces a series of synthetic analogs based on thiomethylacetamide-quinoline derivatives linked to diphenyl-imidazole as highly potential α-glucosidase inhibitors. Twenty derivatives were synthesized and screened in vitro against α-glucosidase, revealing IC50 values ranging from 0.18 ± 0.00 to 2.10 ± 0.07 µM, in comparison to the positive control, acarbose. Among these derivatives, compound 10c (IC50 = 0.180 µM) demonstrated the highest potency and revealed a competitive inhibitory mechanism in kinetic studies (Ki = 0.15 µM). Docking and molecular dynamic evaluations elucidated the binding mode of 10c with the active site residues of the α-glucosidase enzyme. Moreover, in vivo assessments on a rat model of DM affirmed the anti-diabetic efficacy of 10c, evidenced by reduced fasting and overall blood glucose levels. The histopathological evaluation enhanced pancreatic islet architecture and hepatocytes in liver sections. In conclusion, novel 2-(quinoline-2-ylthio)acetamide derivatives as potent α-glucosidase inhibitors were developed. Compound 10c emerged as a promising candidate for diabetes management, warranting further investigation for potential clinical applications and mechanistic insights.


Assuntos
Compostos de Bifenilo , Diabetes Mellitus Tipo 2 , Quinolinas , Animais , Ratos , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Diabetes Mellitus Tipo 2/tratamento farmacológico , alfa-Glucosidases/metabolismo , Cinética , Simulação de Acoplamento Molecular , Imidazóis/farmacologia , Quinolinas/farmacologia , Quinolinas/química , Acetamidas/farmacologia , Relação Estrutura-Atividade , Estrutura Molecular
8.
Bioorg Med Chem Lett ; 103: 129692, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38452826

RESUMO

An eco-friendly facile synthesis of a series of twenty 1-(4/6-substitutedbenzo[d]thiazol-2-yl)-3-(phenyl/substitutedphenyl)indeno[1,2-c]pyrazol-4(1H)-ones 7a-t was achieved by the reaction of 2-(benzoyl/substitutedbenzoyl)-(1H)-indene-1,3(2H)-dione 3a-t and 2-hydrazinyl-4/6-substitutedbenzo[d]thiazole 6a-t in presence of freshly dried ethanol and glacial acetic acid under reflux conditions in good yields. The newly synthesized derivatives were well characterized using different physical and spectral techniques (FTIR, 1H NMR & 13C NMR, and HRMS). All the compounds were subjected to assess their in vitro α-amylase and glucose diffusion inhibitory activity. Amongst them, the compounds 7i and 7l showed better α-amylase inhibitory activity demonstrating IC50 values of 92.99±1.94 µg/mL and 95.41±3.92 µg/mL, respectively in comparison to the standard drug acarbose (IC50 value of 103.60±2.15 µg/mL). The derivatives 7d and 7k exhibited good glucose diffusion inhibition with values of 2.25±1.16 µg/mL and 2.63±1.45 µg/mL, respectively with standard reference acarbose (2.76±0.55 µg/mL). The observed α-amylase inhibitory activity findings were corroborated through molecular docking investigations, particularly for the highly active compounds 7i (binding energy -8.0 kcal/mol) and 7l (binding energy -8.2 kcal/mol) respectively, in comparison to acarbose with a value of binding energy -6.9 kcal/mol for α-amylase.


Assuntos
Acarbose , Glucose , Relação Estrutura-Atividade , Estrutura Molecular , Simulação de Acoplamento Molecular , alfa-Amilases/metabolismo , Benzotiazóis/farmacologia , alfa-Glucosidases/metabolismo , Inibidores de Glicosídeo Hidrolases/farmacologia
9.
Carbohydr Res ; 537: 109074, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38452719

RESUMO

Two new glycosides, sindosides A-B (1-2), along with 11 previously identified metabolites (3-13), were isolated from an ethanolic extract of the leaves of Sindora siamensis var. maritima. The structures of the purified phytochemicals were elucidated by interpreting their spectroscopic data (IR, NMR, and HRMS). The absolute configuration of compound 1 was established by experimental and calculated ECD spectra. The antimicrobial results revealed that compound 8 selectively inhibited C. albicans fungal with a MIC value of 64 µg/mL, whereas 11 presented a weak inhibition toward E. faecalis, S. aureus, and B. cereus bacterial strains with the same MIC value of 128 µg/mL. Interestingly, compounds 1, 2, 8, 9, and 11 showed α-glucosidase inhibitory activity with IC50 values ranging from 14.42 ± 0.21 to 30.62 ± 0.18 µM, which were more active than the positive control (acarbose, with an IC50 value of 46.78 ± 1.37 µM). Enzyme kinetic analysis revealed that compounds 1, 2, and 11 behaved as uncompetitive inhibitors with Ki values of 8.60 ± 1.04, 5.16 ± 0.73, and 7.17 ± 0.98 µM, respectively.


Assuntos
Anti-Infecciosos , alfa-Glucosidases , alfa-Glucosidases/metabolismo , Cinética , Staphylococcus aureus , Anti-Infecciosos/farmacologia , Extratos Vegetais/química , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química
10.
J Chromatogr A ; 1720: 464822, 2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38502989

RESUMO

α-Glucosidase plays a direct role in the metabolic pathways of starch and glycogen, any dysfunction in its activity could result in metabolic disease. Concurrently, this enzyme serves as a target for diverse drugs and inhibitors, contributing to the regulation of glucose metabolism in the human body. Here, an integrated analytical method was established to screen inhibitors of α-glucosidase. This step-by-step screening model was accomplished through the biosensing and affinity chromatography techniques. The newly proposed sensing program had a good linear relationship within the enzyme activity range of 0.25 U mL-1 to 1.25 U mL-1, which can quickly identify active ingredients in complex samples. Then the potential active ingredients can be captured, separated, and identified by an affinity chromatography model. The combination of the two parts was achieved by an immobilized enzyme technology and a microdevice for reaction, and the combination not only ensured efficiency and accuracy for inhibitor screening but also eliminated the occurrence of false positive results in the past. The emodin, with a notable inhibitory effect on α-glucosidase, was successfully screened from five traditional Chinese medicines using this method. The molecular docking results also demonstrated that emodin was well embedded into the active pocket of α-glucosidase. In summary, the strategy provided an efficient method for developing new enzyme inhibitors from natural products.


Assuntos
Emodina , Inibidores de Glicosídeo Hidrolases , Humanos , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Simulação de Acoplamento Molecular , alfa-Glucosidases/metabolismo , Cromatografia de Afinidade , Extratos Vegetais/química
11.
Molecules ; 29(5)2024 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-38474691

RESUMO

Inhibition of glycoside hydrolases has widespread application in the treatment of diabetes. Based on our previous findings, a series of dihydrofuro[3,2-b]piperidine derivatives was designed and synthesized from D- and L-arabinose. Compounds 32 (IC50 = 0.07 µM) and 28 (IC50 = 0.5 µM) showed significantly stronger inhibitory potency against α-glucosidase than positive control acarbose. The study of the structure-activity relationship of these compounds provides a new clue for the development of new α-glucosidase inhibitors.


Assuntos
Acarbose , Inibidores de Glicosídeo Hidrolases , Inibidores de Glicosídeo Hidrolases/farmacologia , Relação Estrutura-Atividade , Acarbose/farmacologia , alfa-Glucosidases/metabolismo , Simulação de Acoplamento Molecular , Estrutura Molecular
12.
Anal Chim Acta ; 1298: 342408, 2024 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-38462333

RESUMO

BACKGROUND: In vitro screening strategies based on the inhibition of α-glucosidase (GAA) activity have been widely used for the discovery of potential antidiabetic drugs, but they still face some challenges, such as poor enzyme stability, non-reusability and narrow range of applicability. To overcome these limitations, an in vitro screening method based on GAA@GOx@Cu-MOF reactor was developed in our previous study. However, the method was still not satisfactory enough in terms of construction cost, pH stability, organic solvent resistance and reusability. Thence, there is still a great need for the development of in vitro screening methods with lower cost and wider applicability. RESULTS: A colorimetric sensing strategy based on GAA/(Au-Au/IrO2)@Cu(PABA) cascade catalytic reactor, which constructed through simultaneous encapsulating Au-Au/IrO2 nanozyme with glucose oxidase-mimicking and peroxidase-mimicking activities and GAA in Cu(PABA) carrier with peroxidase-mimicking activity, was innovatively developed for in vitro screening of GAA inhibitors in this work. It was found that the reactor not only exhibited excellent thermal stability, pH stability, organic solvent resistance, room temperature storage stability, and reusability, but also possessed cascade catalytic performance, with approximately 12.36-fold increased catalytic activity compared to the free system (GAA + Au-Au/IrO2). Moreover, the in vitro GAA inhibitors screening method based on this reactor demonstrated considerable anti-interference performance and detection sensitivity, with a detection limit of 4.79 nM for acarbose. Meanwhile, the method owned good reliability and accuracy, and has been successfully applied to the in vitro screening of oleanolic acid derivatives as potential GAA inhibitors. SIGNIFICANCE: This method not only more effectively solved the shortcomings of poor stability, narrow scope of application, and non-reusability of natural enzymes in the classical method compared with our previous work, but also broaden the application scope of Au-Au/IrO2 nanozyme with glucose oxidase and peroxidase mimicking activities, and Cu(PABA) carrier with peroxidase mimicking activity, which was expected to be a new generation candidate method for GAA inhibitor screening.


Assuntos
Ácido 4-Aminobenzoico , Inibidores de Glicosídeo Hidrolases , Inibidores de Glicosídeo Hidrolases/farmacologia , Glucose Oxidase , Reprodutibilidade dos Testes , Colorimetria/métodos , Peroxidases , Solventes , Peróxido de Hidrogênio
13.
J Chromatogr A ; 1717: 464667, 2024 Feb 22.
Artigo em Inglês | MEDLINE | ID: mdl-38301331

RESUMO

In the present work, comprehensive two-dimensional reversed-phase countercurrent chromatography × reversed-phase liquid chromatography combined (2D RPCCC × RPLC) with 2D microfraction bioactive evaluation was employed to screen and isolate α-glucosidase inhibitors from Rheum palmatum L. Countercurrent chromatography was employed to improve 2D analysis and preparative separation. A selected biphasic solvent system composed of petroleum ether/ethyl acetate/methanol/water with gradient elution mode was used for the first dimension RPCCC separation (1D RPCCC). Solid-phase extraction was applied to eliminate interfering polar compounds before the second dimension analysis (2D RPLC). 76 components were shown in 2D contour plot in UV 280 nm. 11 Candidates were separated by a scaled-up CCC and identified by 1H NMR and 13C NMR, including anthraquinones, flavonoids, stilbenes, phenols, and glucoside derivatives. In addition, it was found that two components, resveratrol-4'-O-(6″-galloyl)glucoside (36) and lyciumaside (43) were identified as natural α-glucosidase inhibitors in Rheum palmatum L. for the first time.


Assuntos
Inibidores de Glicosídeo Hidrolases , Rheum , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Rheum/química , Distribuição Contracorrente/métodos , Cromatografia Líquida de Alta Pressão/métodos , Cromatografia de Fase Reversa , Solventes/química , Extratos Vegetais/farmacologia , Extratos Vegetais/química , Glucosídeos
14.
Phytochemistry ; 220: 114020, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38364883

RESUMO

Three previously undescribed aporphine alkaloids, phaeanthuslucidines E-G, one previously undescribed naphthoquinone derivative, phaeanthusnaphthoquinone, and three known compounds were isolated from an EtOAc extract of the leaves of Phaeanthus lucidus Oliv. The structures of all previously undescribed compounds were established through extensive spectroscopic investigations and high-resolution mass spectroscopy. The 6aR configuration of phaeanthuslucidines E-G was assigned by comparing their ECD spectra and specific rotation values with the reported known compounds. Some isolated compounds were evaluated for their α-glucosidase inhibitory activity. Among these compounds, phaeanthuslucidine E showed the highest α-glucosidase inhibitory activity with an IC50 value of 17.9 ± 0.4 µM. The molecular docking of phaeanthuslucidine E was further studied.


Assuntos
Alcaloides , Aporfinas , alfa-Glucosidases , Simulação de Acoplamento Molecular , Estrutura Molecular , Alcaloides/farmacologia , Alcaloides/química , Aporfinas/farmacologia , Aporfinas/química , Inibidores de Glicosídeo Hidrolases/farmacologia
15.
J Pharm Biomed Anal ; 242: 116037, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38387130

RESUMO

Identifying medicinally relevant compounds from natural resources generally involves the tedious work of screening plants for the desired activity before capturing the bioactive molecules from them. In this work, we created a paper-based ligand fishing platform to vastly simplify the discovery process. This paper-based method exploits the enzymatic cascade reaction between α-glucosidase (GAA), glucose oxidase (GOx), and horseradish peroxidase (HRP), to simultaneously screen the plants and capture the GAA inhibitors from them. The designed test strip could capture ligands in tandem with screening the plants, and it features a very simply operation based on direct visual assessment. Multiple acylated flavonol glycosides from the leaves of Quercus variabilis Blume were newly found to possess GAA inhibitory activities, and they may be potential leads for new antidiabetic medications. Our study demonstrates the prospect of the newly discovered GAA ligands as potential bioactive ingredients as well as the utility of the paper-based ligand fishing method.


Assuntos
Antineoplásicos , Inibidores de Glicosídeo Hidrolases , Inibidores de Glicosídeo Hidrolases/farmacologia , Ligantes , Hipoglicemiantes , Glicosídeos , alfa-Glucosidases
16.
Int J Biol Macromol ; 263(Pt 2): 129517, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38266833

RESUMO

Existing drugs that are being used to treat type-2 diabetes mellitus are associated with several side effects; thus, exploring potential drug candidates is still an utter need these days. Hybrids of indenoquinoxaline and hydrazide have never been explored as antidiabetic agents. In this study, a series of new indenoquinoxaline-phenylacrylohydrazide hybrids (1-30) were synthesized, structurally characterized, and evaluated for α-amylase and α-glucosidase inhibitory activities, as well as for their antioxidant properties. All scaffolds exhibited varying degrees of inhibitory activity against both enzymes, with IC50 values ranging from 2.34 to 61.12 µM for α-amylase and 0.42 to 54.72 µM for α-glucosidase. Particularly, compounds 10, 16, 17, 18, 24, and 25 demonstrated the highest efficacy in inhibiting α-amylase, while compounds 6, 7, 8, 10, 12, 14, 13, 16, 17, 18, 24, and 25 were the most effective α-glucosidase inhibitors, compared to standard acarbose. Moreover, most of these compounds displayed substantial antioxidant potential compared to standard butylated hydroxytoluene (BHT). Kinetics studies revealed competitive inhibition modes by compounds. Furthermore, a comprehensive in silico study and toxicity prediction were also conducted, further validating these analogs as potential drug candidates. The structured compounds demonstrated enhanced profiles, underscoring their potential as primary candidates in drug discovery.


Assuntos
Diabetes Mellitus Tipo 2 , Humanos , Diabetes Mellitus Tipo 2/tratamento farmacológico , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , alfa-Glucosidases/metabolismo , Hipoglicemiantes/farmacologia , Hipoglicemiantes/uso terapêutico , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/uso terapêutico , alfa-Amilases/metabolismo , Simulação de Acoplamento Molecular , Relação Estrutura-Atividade
17.
Chem Biodivers ; 21(3): e202400124, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38279623

RESUMO

Two undescribed triterpenes, syzyfolium A (1) and syzyfolium B (2), together with twelve known compounds, terminolic acid (3), actinidic acid (4), piscidinol A (5), threo-dihydroxydehydrodiconiferyl alcohol (6), lariciresinol-4-O-ß-D-glucoside (7), icariol A2 (8), 14ß,15ß-dihydroxyklaineanone (9), garcimangosone D (10), (+)-catechin (11), myricetin-3-O-α-L-rhamnopyranoside (12), quercitrin (13), and 3, 4, 5-trimethoxyphenyl-(6'-O-galloyl)-O-ß-D-glucopyranoside (14) were isolated from the leaves of Syzygium myrsinifolium. Their chemical structures were determined by IR, HR-ESI-MS, 1D and 2D NMR spectra. Compounds 3 and 4 inhibited significantly α-glucosidase with IC50 values of 23.99 and 36.84, respectively, and compounds 1 and 2 inhibited significantly α-amylase with IC50 values of 35.48 and 43.65 µM, respectively.


Assuntos
Syzygium , Triterpenos , Syzygium/química , alfa-Glucosidases , Extratos Vegetais/farmacologia , Triterpenos/farmacologia , alfa-Amilases , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química
18.
Bioorg Chem ; 144: 107106, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38244380

RESUMO

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by high blood sugar levels. It was shown that modulating the activity of α-glucosidase, an enzyme involved in carbohydrate digestion and absorption, can improve blood sugar control and overall metabolic health in individuals with T2DM. As a result, in the current study, a series of imidazole bearing different substituted thioquinolines were designed and synthesized as α-glucosidase inhibitors. All derivatives exhibited significantly better potency (IC50 = 12.1 ± 0.2 to 102.1 ± 4.9 µM) compared to the standard drug acarbose (IC50 = 750.0 ± 5.0 µM). 8g as the most potent analog, indicating a competitive inhibition with Ki = 9.66 µM. Also, the most potent derivative was subjected to molecular docking and molecular dynamic simulation against α-glucosidase to determine its mode of action in the enzyme and study the complex's behavior over time. In vivo studies showed that 8g did not cause acute toxicity at 2000 mg/kg doses. Additionally, in a diabetic rat model, treatment with 8g significantly reduced fasting blood glucose levels and decreased blood glucose levels following sucrose loading compared to acarbose, a standard drug used for blood sugar control. The findings suggest that the synthesized compound 8g holds promise as an α-glucosidase inhibitor for improving blood sugar control and metabolic health.


Assuntos
Diabetes Mellitus Tipo 2 , Nitroimidazóis , Ratos , Animais , Hipoglicemiantes/farmacologia , Hipoglicemiantes/uso terapêutico , alfa-Glucosidases/metabolismo , Acarbose/farmacologia , Acarbose/uso terapêutico , Glicemia/metabolismo , Diabetes Mellitus Tipo 2/tratamento farmacológico , Simulação de Acoplamento Molecular , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/uso terapêutico , Imidazóis/farmacologia , Imidazóis/uso terapêutico , Nitroimidazóis/uso terapêutico , Relação Estrutura-Atividade , Estrutura Molecular
19.
Sci Rep ; 14(1): 1312, 2024 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-38225280

RESUMO

In this study, a two pyrazole derivatives; 2-(5-methyl-1H-pyrazole-3-carbonyl)-N-phenylhydrazine-1-carboxamide (Pyz-1) and 4-amino-5-(5-methyl-1H-pyrazol-3-yl)-4H-1,2,4-triazole-3-thiol (Pyz-2) were synthesized and characterized by 13C-NMR, 1H-NMR, FT-IR, and mass spectrometry. A complete molecular structures optimization, electronic and thermodynamic properties of Pyz-1 and Pyz-2 in gas phase and aqueous solution were predicted by using hybrid B3LYP method with the 6-311++G** basis sets. Pyz-1 and Pyz-2 were evaluated in vitro for their anti-diabetic, antioxidant and xanthine oxidase inhibition activities. For anti-diabetic activity, Pyz-1 and Pyz-2 showed a potent α-glucosidase and α-amylase inhibition with IC50 values of 75.62 ± 0.56, 95.85 ± 0.92 and 119.3 ± 0.75, 120.2 ± 0.68 µM, respectively, compared to Acarbose (IC50(α-glucosidase) = 72.58 ± 0.68 µM, IC50(α-amylase) = 115.6 ± 0.574 µM). In xanthine oxidase assay, Pyz-1 and Pyz-2 exhibited remarkable inhibitory ability with IC50 values 24.32 ± 0.78 and 10.75 ± 0.54 µM, respectively. The result of antioxidant activities showed that the title compounds have considerable antioxidant and radical scavenger abilities. In addition, molecular docking simulation was used to determine the binding modes and energies between the title compounds and α-glucosidase and α-amylase enzymes.


Assuntos
Diabetes Mellitus , Hipoglicemiantes , Humanos , Hipoglicemiantes/química , Inibidores de Glicosídeo Hidrolases/farmacologia , Antioxidantes/farmacologia , Antioxidantes/química , Simulação de Acoplamento Molecular , alfa-Glucosidases/metabolismo , Xantina Oxidase , Espectroscopia de Infravermelho com Transformada de Fourier , Estrutura Molecular , Pirazóis/farmacologia , alfa-Amilases/metabolismo , Relação Estrutura-Atividade
20.
Sci Rep ; 14(1): 388, 2024 01 03.
Artigo em Inglês | MEDLINE | ID: mdl-38172167

RESUMO

Regarding the important role of α-glucosidase enzyme in the management of type 2 diabetes mellitus, the current study was established to design and synthesize aryl-quinoline-4-carbonyl hydrazone bearing different 2-methoxyphenoxyacetamide (11a-o) and the structure of all derivatives was confirmed through various techniques including IR, 1H-NMR, 13C-NMR and elemental analysis. Next, the α-glucosidase inhibitory potentials of all derivatives were evaluated, and all compounds displayed potent inhibition with IC50 values in the range of 26.0 ± 0.8-459.8 ± 1.5 µM as compared to acarbose used as control, except 11f and 11l. Additionally, in silico-induced fit docking and molecular dynamics studies were performed to further investigate the interaction, orientation, and conformation of the newly synthesized compounds over the active site of α-glucosidase.


Assuntos
Diabetes Mellitus Tipo 2 , Quinolinas , Humanos , Inibidores de Glicosídeo Hidrolases/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Simulação de Dinâmica Molecular , alfa-Glucosidases/metabolismo , Hidrazonas/farmacologia , Hidrazonas/química , Simulação de Acoplamento Molecular , Saccharomyces cerevisiae/metabolismo , Relação Estrutura-Atividade , Quinolinas/química , Cinética , Estrutura Molecular
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