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1.
J Biochem Mol Toxicol ; 37(11): e23482, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37530602

RESUMO

Inflammation is an essential immune response that helps fight infections and heal tissues. However, chronic inflammation has been linked to several diseases, including cancer, autoimmune disorders, cardiovascular diseases, and neurological disorders. This has increased interest in finding natural substances that can modulate the immune system inflammatory signaling pathways to prevent or treat these diseases. Luteolin is a flavonoid found in many fruits, vegetables, and herbs. It has been shown to have anti-inflammatory effects by altering signaling pathways in immune cells. This review article discusses the current research on luteolin's role as a natural immune system modulator of inflammatory signaling mechanisms, such as its effects on nuclear factor-kappa B, mitogen-activated protein kinases, Janus kinase/signal transducer and activator of transcription, and inflammasome signaling processes. The safety profile of luteolin and its potential therapeutic uses in conditions linked to inflammation are also discussed. Overall, the data point to Luteolin's intriguing potential as a natural regulator of immune system inflammatory signaling processes. More research is needed to fully understand its mechanisms of action and possible therapeutic applications.


Assuntos
Luteolina , Neoplasias , Humanos , Luteolina/farmacologia , Luteolina/uso terapêutico , Inflamação/tratamento farmacológico , Neoplasias/tratamento farmacológico , Transdução de Sinais , Sistema Imunitário
2.
Br J Clin Pharmacol ; 88(8): 3562-3565, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35352842

RESUMO

COVID-19 has spread globally, affecting almost 160 million individuals. Elderly and pre-existing patients (such as diabetes, heart disease and asthma) seem more susceptible to severe illness with COVID-19. Roflumilast was licensed for usage in the European Union in July 2010 as a phosphodiesterase-4 (PDE4) inhibitor. Under preclinical studies, roflumilast has been shown to decrease bleomycin-induced lung fibrosis, lung hydroxyproline and right heart thickening. The current study reviewed existing data that the PDE-4 inhibitor, a roflumilast, protects renal tissues and other major organ systems after COVID-19 infection by decreasing immune cell infiltration. These immune-balancing effects of roflumilast were related to a decrease in oxidative and inflammatory burden, caspase-3 suppression and increased protein kinase A (PKA)/cyclic A.M.P. (cAMP) levels in renal and other organ tissue.


Assuntos
Tratamento Farmacológico da COVID-19 , Inibidores da Fosfodiesterase 4 , Idoso , Aminopiridinas/efeitos adversos , Benzamidas , Ciclopropanos/efeitos adversos , Humanos , Inflamação/tratamento farmacológico , Inibidores da Fosfodiesterase 4/efeitos adversos , SARS-CoV-2
3.
J Biochem Mol Toxicol ; 36(6): e23030, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35253303

RESUMO

Aging is accompanied by major changes in body composition that can negatively affect functional status in older adults, including a progressive decrease in muscle mass, strength, and quality. The prevalence of sarcopenia has varied considerably, depending on the definition used and the population surveyed-a 2014 meta-analysis across several countries found estimates ranging from 1% to 29% for people aged 60 years or older, who live independently. The potentially relevant studies were retrieved from the ScienceDirect/Medline/PubMed/Public library of science/Mendeley/Springer link and Google Scholar. Multiple keywords were used for the literature search both alone and in combination. Some of the important keywords used for literature search were as follows: "Epidemiology of muscle weakness/muscle disorders," "Pathogenesis of RAAS in muscle weakness," "Role of Angiotensin 1-7/ACE-2/Mas R axis in muscle weakness," and "Correction pathophysiology of muscle weakness via ACE2." The renin-angiotensin system (RAAS), a major blood pressure regulatory system, is a candidate mediator that may promote aging-associated muscle weakness. Previously, studies explored the proof concept for RAAS inhibition as a therapeutic target. Furthermore, in RAAS, angiotensin II, and angiotensin-converting enzyme 2 (ACE2) have been reported to induce endoplasmic reticulum (ER) stress via glucose-regulated protein 78/eukaryotic translation initiation factor 2α (eIF2α)/activating transcription factor 4 (ATF4)/CHOP axis in the liver. In addition, other mitochondria and ER physical interactions contribute to skeletal muscle dysfunction. However, very few studies have investigated the relationship between RAAS and ER stress-associated pathophysiological events and ACE2-mediated biological consequences in muscle weakness. Thus, the study has been designed to investigate the RAAS-independent beneficial role of ACE2 in muscle weakness.


Assuntos
Enzima de Conversão de Angiotensina 2 , Sistema Renina-Angiotensina , Idoso , Angiotensina II , Humanos , Debilidade Muscular , Peptidil Dipeptidase A/metabolismo
4.
Molecules ; 27(9)2022 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-35566187

RESUMO

Parkinson's disease (PD) and Alzheimer's disease (AD) are neurodegenerative disorders that have emerged as among the serious health problems of the 21st century. The medications currently available to treat AD and PD have limited efficacy and are associated with side effects. Natural products are one of the most vital and conservative sources of medicines for treating neurological problems. Karanjin is a furanoflavonoid, isolated mainly from Pongamia pinnata with several medicinal plants, and has been reported for numerous health benefits. However, the effect of karanjin on AD and PD has not yet been systematically investigated. To evaluate the neuroprotective effect of karanjin, extensive in silico studies starting with molecular docking against five putative targets for AD and four targets for PD were conducted. The findings were compared with three standard drugs using Auto Dock 4.1 and Molegro Virtual Docker software. Additionally, the physiochemical properties (Lipinski rule of five), drug-likeness and parameters including absorption, distribution, metabolism, elimination and toxicity (ADMET) profiles of karanjin were also studied. The molecular dynamics (MD) simulations were performed with two selective karanjin docking complexes to analyze the dynamic behaviors and binding free energy at 100 ns time scale. In addition, frontier molecular orbitals (FMOs) and density-functional theory (DFT) were also investigated from computational quantum mechanism perspectives using the Avogadro-ORCA 1.2.0 platform. Karanjin complies with all five of Lipinski's drug-likeness rules with suitable ADMET profiles for therapeutic use. The docking scores (kcal/mol) showed comparatively higher potency against AD and PD associated targets than currently used standard drugs. Overall, the potential binding affinity from molecular docking, static thermodynamics feature from MD-simulation and other multiparametric drug-ability profiles suggest that karanjin could be considered as a suitable therapeutic lead for AD and PD treatment. Furthermore, the present results were strongly correlated with the earlier study on karanjin in an Alzheimer's animal model. However, necessary in vivo studies, clinical trials, bioavailability, permeability and safe dose administration, etc. must be required to use karanjin as a potential drug against AD and PD treatment, where the in silico results are more helpful to accelerate the drug development.


Assuntos
Doença de Alzheimer , Doença de Parkinson , Doença de Alzheimer/tratamento farmacológico , Animais , Benzopiranos , Desenho de Fármacos , Simulação de Acoplamento Molecular , Simulação de Dinâmica Molecular , Doença de Parkinson/tratamento farmacológico
5.
Molecules ; 27(8)2022 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-35458770

RESUMO

Bisphenol A (BPA), a well-known xenoestrogen, is commonly utilised in the production of polycarbonate plastics. Based on the existing evidence, BPA is known to induce neurotoxicity and behavioural issues. Flavonoids such as silibinin and naringenin have been shown to have biological activity against a variety of illnesses. The current research evaluates the neuropharmacological effects of silibinin and naringenin in a zebrafish model against neurotoxicity and oxidative stress caused by Bisphenol A. In this study, a novel tank diving test (NTDT) and light−dark preference test (LDPT) were used in neurobehavioural investigations. The experimental protocol was planned to last 21 days. The neuroprotective effects of silibinin (10 µM) and naringenin (10 µM) in zebrafish (Danio rerio) induced by BPA (17.52 µM) were investigated. In the brine shrimp lethality assay, the 50% fatal concentrations (LC50) were 34.10 µg/mL (silibinin) and 91.33 µg/mL (naringenin) compared to the standard potassium dichromate (13.15 µg/mL). The acute toxicity investigation found no mortality or visible abnormalities in the silibinin- and naringenin-treated groups (LC50 > 100 mg/L). The altered scototaxis behaviour in LDPT caused by BPA was reversed by co-supplementation with silibinin and naringenin, as shown by decreases in the number of transitions to the light zone and the duration spent in the light zone. Our findings point to BPA's neurotoxic potential in causing altered scototaxis and bottom-dwelling behaviour in zebrafish, as well as the usage of silibinin and naringenin as potential neuroprotectants.


Assuntos
Fármacos Neuroprotetores , Síndromes Neurotóxicas , Animais , Compostos Benzidrílicos/toxicidade , Desenho de Fármacos , Flavanonas , Flavonoides , Fármacos Neuroprotetores/farmacologia , Síndromes Neurotóxicas/tratamento farmacológico , Síndromes Neurotóxicas/etiologia , Fenóis , Silibina/farmacologia , Peixe-Zebra
6.
Molecules ; 27(1)2022 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-35011497

RESUMO

Genistein is a naturally occurring polyphenolic molecule in the isoflavones group which is well known for its neuroprotection. In this review, we summarize the efficacy of genistein in attenuating the effects of memory impairment (MI) in animals. Scopus, PubMed, and Web of Science databases were used to find the relevant articles and discuss the effects of genistein in the brain, including its pharmacokinetics, bioavailability, behavioral effects, and some of the potential mechanisms of action on memory in several animal models. The results of the preclinical studies highly suggested that genistein is highly effective in enhancing the cognitive performance of the MI animal models, specifically in the memory domain, including spatial, recognition, retention, and reference memories, through its ability to reduce oxidative stress and attenuate neuroinflammation. This review also highlighted challenges and opportunities to improve the drug delivery of genistein for treating MI. Along with that, the possible structural modifications and derivatives of genistein to improve its physicochemical and drug-likeness properties are also discussed. The outcomes of the review proved that genistein can enhance the cognitive performance and ameliorate MI in different preclinical studies, thus indicating its potential as a natural lead for the design and development of a novel neuroprotective drug.


Assuntos
Encéfalo/metabolismo , Genisteína/uso terapêutico , Transtornos da Memória/tratamento farmacológico , Doenças Neuroinflamatórias/tratamento farmacológico , Fármacos Neuroprotetores/uso terapêutico , Animais , Desenho de Fármacos , Humanos , Transtornos da Memória/metabolismo , Doenças Neuroinflamatórias/metabolismo
7.
Molecules ; 27(3)2022 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-35163934

RESUMO

Cardiovascular disorders (CVDs) are the leading risk factor for death worldwide, and research into the processes and treatment regimens has received a lot of attention. Tilianin is a flavonoid glycoside that can be found in a wide range of medicinal plants and is most commonly obtained from Dracocephalum moldavica. Due to its extensive range of biological actions, it has become a well-known molecule in recent years. In particular, numerous studies have shown that tilianin has cardioprotective properties against CVDs. Hence, this review summarises tilianin's preclinical research in CVDs, as well as its mechanism of action and opportunities in future drug development. The physicochemical and drug-likeness properties, as well as the toxicity profile, were also highlighted. Tilianin can be a natural lead molecule in the therapy of CVDs such as coronary heart disease, angina pectoris, hypertension, and myocardial ischemia, according to scientific evidence. Free radical scavenging, inflammation control, mitochondrial function regulation, and related signalling pathways are all thought to play a role in tilianin's cardioprotective actions. Finally, we discuss tilianin-derived compounds, as well as the limitations and opportunities of using tilianin as a lead molecule in drug development for CVDs. Overall, the scientific evidence presented in this review supports that tilianin and its derivatives could be used as a lead molecule in CVD drug development initiatives.


Assuntos
Produtos Biológicos/farmacologia , Doenças Cardiovasculares/tratamento farmacológico , Desenho de Fármacos , Desenvolvimento de Medicamentos , Flavonoides/farmacologia , Glicosídeos/farmacologia , Animais , Humanos
8.
Molecules ; 27(3)2022 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-35163999

RESUMO

Kirenol, a potential natural diterpenoid molecule, is mainly found in Sigesbeckia species. Kirenol has received a lot of interest in recent years due to its wide range of pharmacological actions. In particular, it has a significant ability to interact with a wide range of molecular targets associated with inflammation. In this review, we summarise the efficacy and safety of kirenol in reducing inflammation, as well as its potential mechanisms of action and opportunities in future drug development. Based on the preclinical studies reported earlier, kirenol has a good therapeutic potential against inflammation involved in multiple sclerosis, inflammatory bowel disorders, diabetic wounds, arthritis, cardiovascular disease, bone damage, and joint disorders. We also address the physicochemical and drug-like features of kirenol, as well as the structurally modified kirenol-derived molecules. The inhibition of pro-inflammatory cytokines, reduction in the nuclear factor kappa-B (NF-κB), attenuation of antioxidant enzymes, stimulation of heme-oxygenase-1 (HO-1) expression, and nuclear factor erythroid 2-related factor 2 (Nrf2) phosphorylation are among the molecular mechanisms contributing to kirenol's anti-inflammatory actions. Furthermore, this review also highlights the challenges and opportunities to improve the drug delivery of kirenol for treating inflammation. According to the findings of this review, kirenol is an active molecule against inflammation in numerous preclinical models, indicating a path to using it for new drug discovery and development in the treatment of a wide range of inflammations.


Assuntos
Anti-Inflamatórios/farmacologia , Produtos Biológicos/farmacologia , Diterpenos/farmacologia , Desenho de Fármacos , Desenvolvimento de Medicamentos , Inflamação/tratamento farmacológico , Animais , Citocinas/metabolismo , Humanos
9.
Molecules ; 27(6)2022 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-35335393

RESUMO

Sarsasapogenin is a natural steroidal sapogenin molecule obtained mainly from Anemarrhena asphodeloides Bunge. Among the various phytosteroids present, sarsasapogenin has emerged as a promising molecule due to the fact of its diverse pharmacological activities. In this review, the chemistry, biosynthesis and pharmacological potentials of sarsasapogenin are summarised. Between 1996 and the present, the relevant literature regarding sarsasapogenin was obtained from scientific databases including PubMed, ScienceDirect, Scopus, and Google Scholar. Overall, sarsasapogenin is a potent molecule with anti-inflammatory, anticancer, antidiabetic, anti-osteoclastogenic and neuroprotective activities. It is also a potential molecule in the treatment for precocious puberty. This review also discusses the metabolism, pharmacokinetics and possible structural modifications as well as obstacles and opportunities for sarsasapogenin to become a drug molecule in the near future. More comprehensive preclinical studies, clinical trials, drug delivery, formulations of effective doses in pharmacokinetics studies, evaluation of adverse effects and potential synergistic effects with other drugs need to be thoroughly investigated to make sarsasapogenin a potential molecule for future drug development.


Assuntos
Anemarrhena , Espirostanos , Anemarrhena/química , Desenho de Fármacos , Espirostanos/química , Espirostanos/farmacologia
10.
Molecules ; 27(15)2022 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-35956923

RESUMO

Urinary tract infections (UTIs) are becoming more common, requiring extensive protection from antimicrobials. The global expansion of multi-drug resistance uropathogens in the past decade emphasizes the necessity of newer antibiotic treatments and prevention strategies for UTIs. Medicinal plants have wide therapeutic applications in both the prevention and management of many ailments. Bacopa monnieri is a medicinal plant that is found in the warmer and wetlands regions of the world. It has been used in Ayurvedic systems for centuries. The present study aimed to investigate the antibacterial potential of the extract of B. monnieri leaves and its bioactive molecules against UTIs that are caused by Klebsiella pneumoniae and Proteus mirabilis. This in vitro experimental study was conducted by an agar well diffusion method to evaluate the antimicrobial effect of 80% methanol, 96% ethanol, and aqueous extracts of B. monnieri leaves on uropathogens. Then, further screening of their phytochemicals was carried out using standard methods. To validate the bioactive molecules and the microbe interactions, AutoDock Vina software was used for molecular docking with the Klebsiella pneumoniae fosfomycin resistance protein (5WEW) and the Zn-dependent receptor-binding domain of Proteus mirabilis MR/P fimbrial adhesin MrpH (6Y4F). Toxicity prediction and drug likeness were predicted using ProTox-II and Molinspiration, respectively. A molecular dynamics (MD) simulation was carried out to study the protein ligand complexes. The methanolic leaves extract of B. monnieri revealed a 22.3 mm ± 0.6 mm to 25.0 mm ± 0.5 mm inhibition zone, while ethanolic extract seemed to produce 19.3 mm ± 0.8 mm to 23.0 mm ± 0.4 mm inhibition zones against K. pneumoniae with the use of increasing concentrations. In the case of P. mirabilis activity, the methanolic extracts showed a 21.0 mm ± 0.8 mm to 24.0 mm ± 0.6 mm zone of inhibition and the ethanol extract produced a 17.0 mm ± 0.9 mm to 23.0 mm ± 0.7 mm inhibition zone with increasing concentrations. Carbohydrates, flavonoids, saponin, phenolic, and terpenoid were common phytoconstituents identified in B. monnieri extracts. Oroxindin showed the best interactions with the binding energies with 5WEW and 6Y4F, -7.5 kcal/mol and -7.4 kcal/mol, respectively. Oroxindin, a bioactive molecule, followed Lipinski's rule of five and exhibited stability in the MD simulation. The overall results suggest that Oroxindin from B. monnieri can be a potent inhibitor for the effective killing of K. pneumoniae and P. mirabilis. Additionally, its safety has been established, indicating its potential for future drug discovery and development in the treatment for UTIs.


Assuntos
Bacopa , Infecções Urinárias , Antibacterianos/farmacologia , Bacopa/química , Etanol , Klebsiella pneumoniae , Simulação de Acoplamento Molecular , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Proteus mirabilis , Infecções Urinárias/tratamento farmacológico , Infecções Urinárias/microbiologia
11.
Molecules ; 27(16)2022 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-36014304

RESUMO

Viniferin is a resveratrol derivative. Resveratrol is the most prominent stilbenoid synthesized by plants as a defense mechanism in response to microbial attack, toxins, infections or UV radiation. Different forms of viniferin exist, including alpha-viniferin (α-viniferin), beta-viniferin (ß-viniferin), delta-viniferin (δ-viniferin), epsilon-viniferin (ε-viniferin), gamma-viniferin (γ-viniferin), R-viniferin (vitisin A), and R2-viniferin (vitisin B). All of these forms exhibit a range of important biological activities and, therefore, have several possible applications in clinical research and future drug development. In this review, we present a comprehensive literature search on the chemistry and biosynthesis of and the diverse studies conducted on viniferin, especially with regards to its anti-inflammatory, antipsoriasis, antidiabetic, antiplasmodic, anticancer, anti-angiogenic, antioxidant, anti-melanogenic, neurodegenerative effects, antiviral, antimicrobial, antifungal, antidiarrhea, anti-obesity and anthelminthic activities. In addition to highlighting its important chemical and biological activities, coherent and environmentally acceptable methods for establishing vinferin on a large scale are highlighted to allow the development of further research that can help to exploit its properties and develop new phyto-pharmaceuticals. Overall, viniferin and its derivatives have the potential to be the most effective nutritional supplement and supplementary medication, especially as a therapeutic approach. More researchers will be aware of viniferin as a pharmaceutical drug as a consequence of this review, and they will be encouraged to investigate viniferin and its derivatives as pharmaceutical drugs to prevent future health catastrophes caused by a variety of serious illnesses.


Assuntos
Estilbenos , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Antivirais , Descoberta de Drogas , Preparações Farmacêuticas , Resveratrol/farmacologia , Estilbenos/química , Estilbenos/farmacologia , Estilbenos/uso terapêutico
12.
Arch Pharm (Weinheim) ; 354(4): e2000446, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33522644

RESUMO

Cyclopolypeptides are among the most predominant biomolecules in nature, especially those derived from plant seeds. This category of compounds has gained extraordinary attention due to remarkable variety of structures and valuable biofunctions. These congeners display enormous variation in terms of both structure and function and are the most significant biomolecules due to their widespread bioproperties. The estrogenic activity, immunosuppressive activity, cytotoxicity, vasorelaxant activity, and other properties possessed by cyclic peptides from seeds of plants make these congeners attractive leads for the drug discovery process. The current study covers the important structural features, structure-activity relationship, synthesis methods, and bioproperties of plant seeds-originated bioactive peptides from Vaccaria segetalis, Linum usitatissimum, and Goniothalamus leiocarpus, which may prove vital for the development of novel therapeutics based on a peptide skeleton.


Assuntos
Produtos Biológicos/química , Peptídeos/química , Compostos Fitoquímicos/química , Plantas Medicinais/química , Sementes/química , Produtos Biológicos/metabolismo , Produtos Biológicos/farmacologia , Linho/química , Goniothalamus/química , Humanos , Conformação Molecular , Peptídeos/metabolismo , Peptídeos/farmacologia , Compostos Fitoquímicos/metabolismo , Compostos Fitoquímicos/farmacologia , Vaccaria/química
13.
Drug Dev Res ; 82(8): 1075-1078, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34469011

RESUMO

One of the most remarkable results in 2019 is the reduced prevalence and death of children from coronavirus infection (COVID-19). In 2019, a worldwide pandemic impacted around 0.1 billion individuals, with over 3.5 million mortality reported in the literature. There is minimal knowledge on SARS-CoV-2 infection immunological responses in kids. Studies have been focused mostly on adults and children since the course of pediatric sickness is often short. In adults, severe COVID-19 is related to an excessive inflammatory reaction. Macrophages and monocytes are well known to contribute to this systemic response, although numerous lines are indicative of the importance of neutrophils. An increased number of neutrophils and neutrophil to lymphocyte ratios are early signs of SARS-CoV-2 and a worse prognosis. In this study that it is crucial to monitor PAR2 and PAR4 expression and function (since nursing children have elevated levels) and the inhibiting the normal physiology through the use of anticoagulants may exacerbate the problem in adults. Thus, in COVID-19 infection, we propose the use of antiplatelet (thromboxane A2 inhibitors), if required rather than anticoagulants (FXa and thrombin Inhibitors).


Assuntos
COVID-19/metabolismo , Receptor PAR-2/metabolismo , Receptores de Trombina/metabolismo , Adulto , Fatores Etários , Anticoagulantes/farmacologia , Anticoagulantes/uso terapêutico , COVID-19/imunologia , Criança , Humanos , Contagem de Linfócitos , Neutrófilos/imunologia , Inibidores da Agregação Plaquetária/farmacologia , Inibidores da Agregação Plaquetária/uso terapêutico , Tratamento Farmacológico da COVID-19
14.
Pak J Pharm Sci ; 34(4): 1397-1401, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34799313

RESUMO

The current research was aimed to isolate newer phyto-metabolites from rhizomes of Alpinia galanga plant. Study involved preparation of Alpinia galanga rhizome methanolic extract, followed by normal phase column chromatography assisted isolation of new phytometabolites (using different combinations of chloroform and methanol), and characterization (by UV, FTIR, 13C-NMR, 1H-NMR, COSY, DEPT and Mass spectrometry). The isolation and characterization experiment offered two phytometabolites: an ester (Ag-1) and tetrahydronapthalene type lactone (Ag-2). Present study concludes and reports the two phytometabolites, benzyl myristate (Ag-1) and 3-Methyl-6α, 8ß-diol-7-carboxylic acid tetralin-11, 9ß-olide (Ag-2) for the first time in Alpinia galanga rhizome. The study recommends that these phytometabolites Ag-1 and Ag-2 can be utilized as effective analytical biomarkers for identification, purity and quality control of this plant in future.


Assuntos
Alpinia/química , Extratos Vegetais/isolamento & purificação , Rizoma/química , Compostos de Benzil/química , Compostos de Benzil/isolamento & purificação , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Miristatos/química , Miristatos/isolamento & purificação , Compostos Fitoquímicos/química , Compostos Fitoquímicos/isolamento & purificação , Extratos Vegetais/química
15.
Bioorg Chem ; 95: 103519, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31884140

RESUMO

A set of two series of 1,3,4-oxadiazole (11a-n) and 1,2,4-Triazole (12a, c, e, g, h, j-n) based topsentin analogues were prepared by replacing imizadole moiety of topsentin through a multistep synthesis starting from indole. All the compounds synthesized were submitted for single dose (10 µM) screening against a NCI panel of 60-human cancer cell lines. Among all cancer cell lines, colon (HCC-2998) and Breast (MCF-7, T-47D) cancer cell lines were found to be more susceptible for this class of compounds. Among the compounds tested, compounds 11a, 11d, 11f, 12e and 12h, were exhibited good anti-proliferative activity against various cancer cell lines. Compounds 11d, 12e and 12h demonstrated better activity with IC50 2.42 µM, 3.06 µM, and 3.30 µM respectively against MCF-7 human cancer cell line than that of the standard drug doxorubicin IC50 6.31 µM. Furthermore, 11d induced cell cycle arrest at G0/G1 phase and also disrupted mitochondrial membrane potential with reducing cell migration potential of MCF-7 cells in dose dependent manner. In vitro microtubule polymerization assays found that compound 11d disrupt tubulin dynamics by inhibiting tubulin polymerization with IC50 3.89 µM compared with standard nocodazole (IC50 2.49 µM). In silico docking studies represented that 11d was binding at colchicine binding site of ß-tubulin. Compound 11d emerged as lead molecule from the library of compounds tested and this may serve as a template for further drug discovery.


Assuntos
Antineoplásicos/farmacologia , Desenho de Fármacos , Imidazóis/farmacologia , Indóis/farmacologia , Oxidiazóis/farmacologia , Triazóis/farmacologia , Tubulina (Proteína)/metabolismo , Antineoplásicos/síntese química , Antineoplásicos/química , Ciclo Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Imidazóis/química , Indóis/química , Células MCF-7 , Estrutura Molecular , Oxidiazóis/síntese química , Oxidiazóis/química , Relação Estrutura-Atividade , Triazóis/síntese química , Triazóis/química , Cicatrização/efeitos dos fármacos
16.
Mar Drugs ; 18(6)2020 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-32599909

RESUMO

Peptides are distinctive biomacromolecules that demonstrate potential cytotoxicity and diversified bioactivities against a variety of microorganisms including bacteria, mycobacteria, and fungi via their unique mechanisms of action. Among broad-ranging pharmacologically active peptides, natural marine-originated thiazole-based oligopeptides possess peculiar structural features along with a wide spectrum of exceptional and potent bioproperties. Because of their complex nature and size divergence, thiazole-based peptides (TBPs) bestow a pivotal chemical platform in drug discovery processes to generate competent scaffolds for regulating allosteric binding sites and peptide-peptide interactions. The present study dissertates on the natural reservoirs and exclusive structural components of marine-originated TBPs, with a special focus on their most pertinent pharmacological profiles, which may impart vital resources for the development of novel peptide-based therapeutic agents.


Assuntos
Produtos Biológicos/química , Produtos Biológicos/farmacologia , Peptídeos/química , Tiazóis/química , Animais , Organismos Aquáticos , Descoberta de Drogas , Humanos , Estrutura Molecular
17.
Pak J Pharm Sci ; 33(4): 1739-1745, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33583811

RESUMO

The outbreak of CoVID-19 infection rapidly increases worldwide. Most of the continents affecting from CoVID-19 and still widening its burden disease (Jones DS, 2020; Lai et al., 2020). Along with its fatality rates, CoVID-19 has caused physiological disturbances in the society and termed as "coronophobia". CoVID-19 with renal failure, severe pneumonia and respiratory syndrome patients have been reported to increase the severity of disease conditions (Sevim et al., 2020). Also, CoVID-19 with cancer patients increase the higher risk of infections. Currently, there is no vaccine or specific treatment against CoVID-19 and drug research centres continuously investigating the potential drug against CoVID-19 (Osama and Amer, 2020). For the past 20 years two major coronavirus epidemics have occurred in public includes SARS-CoV approximately 8000 cases and 800 deaths and MERS-CoV 2,500 cases and 800 deaths and these continuing sporadically (Cascella et al., 2020).


Assuntos
COVID-19/epidemiologia , Controle de Doenças Transmissíveis , Fatores Etários , COVID-19/mortalidade , COVID-19/prevenção & controle , COVID-19/transmissão , Comorbidade , Humanos , Período de Incubação de Doenças Infecciosas , Prevalência , Saúde Pública , SARS-CoV-2 , Fatores Sexuais
18.
Bioorg Chem ; 88: 102962, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-31085373

RESUMO

A series of 9-(2-(1-arylethylidene)hydrazinyl)acridine and its analogs were designed, synthesized and evaluated for biological activities. Various biochemical assays were performed to determine the free radical scavenging capacity of synthesized compounds (4a-4j). Anticancer activity of these compounds was assessed against two different human cancer cell lines viz cervical cancer cells (HeLa) and liver cancer cells (HepG2) as well as normal human embryonic kidney cell line (HEK 293). Compounds 4b, 4d and 4e showed potential anti-proliferative effects on HeLa cells. Based on results obtained from antioxidant and cytotoxicity studies, 4b, 4d and 4e were further studied in detail for different biological activities. 4b, 4d and 4e reduced the cell growth, inhibited metastatic activity and declined the potential of cell migration in HeLa cell lines. Topoisomerase1 (Top1) treated with compounds 4b, 4d and 4e exhibited inhibition of Top1 and prevented DNA replication. Molecular docking results validate that interaction of compounds 4b, 4d and 4e with Top1-DNA complex, which might be accountable for their inhibitory effects. Further it was concluded that compounds 4b, 4d and 4e arrests the cells at S phase and consequently induces cell death through DNA damage in HeLa cells.


Assuntos
Acridinas/farmacologia , Antineoplásicos/farmacologia , DNA Topoisomerases Tipo I/metabolismo , Inibidores da Topoisomerase I/farmacologia , Acridinas/síntese química , Acridinas/química , Antineoplásicos/síntese química , Antineoplásicos/química , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Células HEK293 , Células HeLa , Humanos , Estrutura Molecular , Relação Estrutura-Atividade , Inibidores da Topoisomerase I/síntese química , Inibidores da Topoisomerase I/química
20.
Pak J Pharm Sci ; 28(3): 951-7, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-26004728

RESUMO

The objective of present study was to explore the hepatoprotective and antioxidant profile of Citrullus colocynthis fruits. Hepatoprotective profile of methanolic extract of Citrullus colocynthis fruits (MECCF) was investigated on rats, which were made hepatotoxic using paracetamol. The antioxidant profile of MECCF was evaluated by conducting Catalase, Super oxide Dismutase, Lipid Peroxidation and Diphenyl Picryl Hydrazyl tests. During hepatoprotective investigation, the Paracetamol treated group II showed significant increase in total bilirubin (TB), serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT) and alkaline phosphatase (ALP) level. The results so obtained showed that pretreatment of rats with MECCF 300mg/kg p.o. decreases the elevated TB, SGOT, SGPT and ALP serum levels. Also, MECCF inhibitory profile was found comparable with toxicant group (Paracetamol 2g/kg, p.o.). The present study concludes that MECCF fruit possess significant hepatoprotective and antioxidant activity.


Assuntos
Acetaminofen/toxicidade , Analgésicos não Narcóticos/toxicidade , Antioxidantes/farmacologia , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Citrullus colocynthis , Fígado/efeitos dos fármacos , Extratos Vegetais/farmacologia , Substâncias Protetoras/farmacologia , Animais , Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Doença Hepática Induzida por Substâncias e Drogas/patologia , Frutas , Fígado/patologia , Fitoterapia , Ratos
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