Medicinal Chemistry最新文献

Introduction: Glycogen synthase kinase-3β (GSK-3β) is a serine/threonine kinase that is involved in the synthesis of glycogen. Among the inhibitors, thiazolidinediones (TZDs) can specifically bind to GSK-3ß. They act non-competitively with ATP, and as a result, they are very specific and have fewer side effects. In this research, new TZDs were designed and synthesized, and then their inhibitory effects on GSK-3β enzyme and tau aggregation were investigated.

Material and methods: The structure of the compounds was confirmed using 1H-NMR, 13CNMR, and LC-MASS. The inhibitory activities of the compounds 5a-p, against GSK-3ß were evaluated using Z'-LYTE technique, and the IC50 values were determined.

Results: Compound 5l (R1 = Me, R2 = 4-F-benzyl, R3 = butyl) with IC50 of 16.1 μM exhibited the most potent inhibition. Also, the binding with tau protein and their inhibitory effects on the accumulation of recombinant human tau protein (1N4R, htau34) were evaluated using the Surface Plasmon Response (SPR) method. In this study also the impact of TZDs on tau aggregation using the Thioflavin T (ThT) assay was investigated. PC12 cells viability study confirmed the neuroprotective effects of compounds against tau aggregates. MD simulation studies showed the interaction of 5l with the active site of GSK-3b (PDB ID: 2OW3) and also its destructive effect on tau aggregate (PDB ID: 5O3L) was studied.

Conclusion: Overall, the study identified three promising TZDs with potential as inhibitors of GSK-3β and tau proteins, highlighting compound 5l as particularly effective in stabilizing GSK- 3β and disrupting tau aggregation.

Background: To date, COVID-19 has caused over 772 million cases, with approximately 7 million deaths, according to the World Health Organization. Therefore, there is a need to develop new drugs to address the challenges posed by this disease.

Objective: To propose new antiviral agents based on the natural product curcumin as potential protein-protein interaction inhibitors between the SARS-CoV-2 spike receptor binding domain (RBD) and the ACE2 receptor.

Methods: A curcumin-based virtual screening was performed (Tanimoto coefficient= 0.9), and molecular docking analysis were carried out using the RBD as a receptor. Molecular dynamics (MD) using GROMACS were conducted for 120 ns. The SwissADME server was used to predict pharmacokinetics. To validate predictions, an in vitro enzyme assay measuring the relative inhibition of the interaction between the RBD and the ACE2 receptor was performed.

Results: More than 1300 ligands were evaluated through molecular docking. The docking results were analyzed, and the ligands were classified according to their score and profile of interactions with residues of the RBD of the SARS-CoV-2 S glycoprotein. The top ten with the best scores and interactions were selected to verify the commercial availability. The lead compound Cu-1 demonstrated significant interactions with the RBD and stability in MD simulations, was acquired and evaluated in vitro. Compound Cu-1 inhibited 36 ± 0.7 % the interaction between the SARSCoV- 2 spike and the ACE2 receptor. In addition, Cu-1 was shown to have an acceptable druglikeness and pharmacokinetic profile.

Conclusion: Curcumin provides a scaffold for identifying novel compounds with potential antiviral activity. Further studies on compound Cu-1 could yield on optimizing its structure to increase activity targeting the RBD of the S glycoprotein.

Background: Protein Interacting with NIMA1 (PIN1) is a distinct enzyme, known as a peptidyl-prolyl cis-trans isomerase (PPIase), which catalyzes the cis-trans isomerization of amide bonds in proteins containing phosphoserine/threonine-proline (pSer/Thr-Pro) motifs, presenting a unique therapeutic opportunity for addressing multiple disorders.

Methods: A series of 140 thiazole compounds were created using the shape similarity technique with the intention of discovering effective PIN1 inhibitors with a new scaffold. The designed compounds were docked into the enzyme's ATP binding site, and the binding free energies for all docked conformations were calculated. The compounds were evaluated for their ADMET and drug-likeness properties. Following the identification of top candidates, molecular dynamics simulations were conducted to investigate the binding dynamics of the highest-scoring compound.

Results: Based on computational findings, sixteen compounds were identified as potential PIN1 inhibitors. Among the sixteen compounds, four (S8Ba, S8Bb, S8Bd, and S8Bd) exhibited the most favorable ADMET profiles and robust interactions with key PIN1 residues. Molecular dynamics simulations confirmed that S8Ba and S8Bd exhibited the most promising activity over 100ns.

Conclusion: The results corroborated the docking outcomes, validating the selected hits as potential PIN1 inhibitors. This breakthrough could influence the development of therapeutic leads for combating diabetes, cancer, and Alzheimer's disease.

Background and objectives: Cabozantinib, a Tyrosine Kinase Inhibitor (TKI), is widely used in Renal Cell Carcinoma (RCC) therapy but often causes serious side effects such as myelosuppression, immunosuppression, and angiopathy. This study aims to identify key protein targets responsible for the therapeutic efficacy and adverse reactions of cabozantinib and to explore structural modifications to reduce toxicity while preserving efficacy.

Methods: A non-randomized computational approach was employed, screening 400 potential protein targets using SwissTargetPrediction and ChemBL databases. Molecular docking and Structure-Activity Relationship (SAR) analysis were performed to assess interactions between cabozantinib and identified targets, focusing on structural elements contributing to toxicity.

Results: Three primary proteins were identified as responsible for the anti-tumor effects of cabozantinib, while three others were linked to its side effects. Docking analysis revealed that the methoxyphenyl group in cabozantinib formed undesirable hydrogen bonds with toxicity-related proteins. Modulating these off-target interactions by minimizing hydrogen bonding in this region could significantly reduce adverse effects.

Conclusion: These findings provide structural insights into cabozantinib's dual effects and suggest optimization strategies for TKI design, offering a pathway toward safer and more effective RCC treatments.

Unusual cell growth patterns, metastasis (the spread of tumors to other parts of the body), and potential death are all hallmarks of cancerResearch in oncology clearly shows that abnormalities in EGFR expression directly contribute to uncontrolled cell growth and division, resulting in the development of carcinomas.. People with cancer have developed resistance due to mutations in several EGFR-associated genes. Tyrosine kinase inhibitors (TKIs) and other cancer treatments must, therefore, undergo continuous improvement. Currently, fourth-generation tyrosine kinase inhibitors (TKIs) that act allosterically against the C797S mutation are the most widely used class of medications that target EGFR mutations. To help researchers better understand how to optimize pyrazole and pyrazoline-based derivatives as antiproliferative agents, this review summarises the work done in the last fifteen years on different anti-cancer agents representing 31 most potential compounds along with their activity characteristics, with a particular emphasis on the structure-activity relationship (SAR) of possible pyrazole and pyrazoline derivatives as EGFR tyrosine kinase inhibitors.

Indazole-based compounds have recently developed and physiologically evaluated as diverse agents for antibacterial, anticancer, anti-inflammatory, anti-obesity, and neurological therapies. This review highlights these advancements. Through molecular docking and experimental tests, scientists have created distinct indazole analogs that exhibit significant inhibitory effects on various biological targets, including 1,2,3-triazolyl-indazoles, carbothioamides, and carboxamides. Key compounds have demonstrated strong bactericidal and antifungal properties against microbes such as S. epidermidis, P. aeruginosa, E. coli, and C. albicans; their effectiveness was enhanced by halogenated and electron-withdrawing substituents. In models including positive HER2 breast cancer and hepatocellular tumors, indazole derivatives have shown efficacy against targets such as CDK2, EGFR, c-Met, HSP90, and VEGFR2 in oncology, resulting in successful anticancer responses. The pharmacokinetics, solubility, and specificity of these compounds have been further improved through structural alterations, such as piperazine ring modifications and C-terminal changes. Additionally, the LRRK2 antagonist MLi-2 demonstrated remarkable efficacy in treating neurodegenerative diseases, while indazole-5-carboxamides exhibited a strong affinity for monoamine oxidases, potentially offering new therapeutic options for Parkinson's disease. Inhibition of COX-2 and FGFR resulted in anti-inflammatory effects, with minimal off-target damage observed in vivo. Collectively, our findings underscore the therapeutic versatility of indazole frameworks across various disease pathways, suggesting their potential for developing innovative treatments for cancer, infections, metabolic disorders, and neurological conditions.

Pyrimidine derivatives are a class of chemically & biologically active heterocyclic compounds promising for developing anti-tubercular, anti-viral, anti-malarial, anti-inflammatory, and enzyme-inhibiting drugs. To cure TB, scientists were driven to establish novel pyrimidine derivatives. The main objective of the current review is to identify and develop new pyrimidine moietycontaining derivatives that have been assessed for their structure-activity relationship (SAR). The emergence and widespread spread of several drug-resistant MTB infections, which renders firstline anti-TB medications more ineffective. It is crucial to develop new anti-TB drugs that are extremely effective against both drug-sensitive and drug-resistant TB. The development of pyrimidine therapeutics methods will thus benefit from the current review. Three medications-GSK-286, TBA- 7371, and SPR-720 are now undergoing clinical testing. This study aims to emphasize the structural variety of anti-tuberculosis pyrimidine-containing compounds by providing an overview of current developments in drug discovery investigations.

Objective: In the pursuit of identifying divergent scaffolds for potential anticancer and anti-mycobacterial agents, a novel series of Schiff-based threaded 1,2,3-triazoles was designed and synthesized.

Methods: In this study, novel Schiff-based threaded 1,2,3-triazoles have been meticulously crafted and synthesized. Chemical structures of the synthesized molecules were confirmed by 1H NMR, 13C NMR and Mass spectra. Synthetic analogs were further evaluated for their antiproliferative, antitubercular and antimicrobial potentials by in vitro assays.

Results: The in vitro anti-tumor (anti-proliferative) evaluation on HT29 cancer cells revealed that compounds 8b and 8h exhibited remarkable inhibitory activity with IC50 values of 25±0.8 and 24±0.9 μM. In the context of anti-mycobacterial analysis, compound 8c demonstrated promising activity (6.25 μM) against Mycobacterium tuberculosis H37Rv. Moreover, compounds 8d and 8e displayed equipotent antimicrobial potential (3.12 μM) comparable to Ciprofloxacin against both Staphylococcus aureus and Escherichia coli. Molecular docking studies unveiled that 8c exhibited robust binding within the active pocket of carbonic anhydrase XII (docking energy -8.4 kcal/mol) and demonstrated a promising docking profile with β-ketoacyl ACP synthase I (docking energy - 9.5 kcal/mol) in the enzyme's binding pocket.

Conclusion: Structure-activity relationship (SAR) analysis identified three pivotal pharmacophores; 1,2,3-triazole, aromatic ring system (substituted with halogens and -NO2), and imine functionalities as crucial for the development of dual inhibitors targeting cancer and tuberculosis, showcasing an outstanding in silico ADMET profile. Therefore, these compounds merit consideration as noteworthy pharmacological lead molecules in the realm of cancer and tuberculosis drug discovery and development.

Background: PARP1 (poly ADP-ribose polymerase 1, also known as ADPRT1) plays a significant role in DNA repair and has become an attractive target for treating PARP1-related diseases, such as cancer.

Objective: This study aimed to discover inhibitors targeting PARP1 from the phytochemicals of Huangbai (Phellodendron chinense Schneid.), Baixianpi (Dictamnus dasycarpus Turcz.), and Shechuangzi (Cnidium monnieri (L.) Spreng.).

Methods: The chemical compositions of Huangbai, Baixianpi, and Shechuangzi were extracted from the HERB database. Next, a combination of molecular docking and PARP1 enzyme assay was used to identify PARP1 inhibitors from these chemical components. Finally, molecular dynamics simulation and binding free energy calculation were used to explore the detailed interaction mode of these inhibitors with PARP1.

Results: A total of 507 chemical constituents of Huangbai, Baixianpi, and Shechuangzi were collected from the HERB database. Four potential PARP1 inhibitors were screened based on molecular docking and PARP1 enzyme assay. Demethyleneberberine exhibited strong PARP1 inhibitory activity with an IC50 value of 2.0 ± 0.8 μM. The IC50 values of the inhibitory activities of 8-hydroxy dictanmnine, meranzin hydrate, and osthol on PARP1 ranged from 44 μM to 76 μM. Molecular dynamics simulation and binding free energy calculation suggested that the nonpolar interaction energies of HIS862, GLY863, TYR889, TYR896, PHE897, and TYR907 played a primary role in the binding of inhibitors to PARP1.

Conclusion: Integrating molecular simulation and bioactivity testing was found to be an effective approach for the rapid discovery of targeted PARP1 inhibitors. Demethyleneberberine demonstrated strong PRAP1 inhibitory activity and has a good prospect for development.