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3.
Int J Mol Sci ; 23(16)2022 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-36012704

RESUMO

Ellagic acid has recently attracted increasing attention regarding its role in the prevention and treatment of cancer. Surface functionalized nanocarriers have been recently studied for enhancing cancer cells' penetration and achieving better tumor-targeted delivery of active ingredients. Therefore, the present work aimed at investigating the potential of APA-functionalized emulsomes (EGA-EML-APA) for enhancing cytototoxic activity of EGA against human breast cancer cells. Phospholipon® 90 G: cholesterol molar ratio (PC: CH; X1, mole/mole), Phospholipon® 90 G: Tristearin weight ratio (PC: TS; X2, w/w) and apamin molar concentration (APA conc.; X3, mM) were considered as independent variables, while vesicle size (VS, Y1, nm) and zeta potential (ZP, Y2, mV) were studied as responses. The optimized formulation with minimized vs. and maximized absolute ZP was predicted successfully utilizing a numerical technique. EGA-EML-APA exhibited a significant cytotoxic effect with an IC50 value of 5.472 ± 0.21 µg/mL compared to the obtained value from the free drug 9.09 ± 0.34 µg/mL. Cell cycle profile showed that the optimized formulation arrested MCF-7 cells at G2/M and S phases. In addition, it showed a significant apoptotic activity against MCF-7 cells by upregulating the expression of p53, bax and casp3 and downregulating bcl2. Furthermore, NF-κB activity was abolished while the expression of TNfα was increased confirming the significant apoptotic effect of EGA-EML-APA. In conclusion, apamin-functionalized emulsomes have been successfully proposed as a potential anti-breast cancer formulation.


Assuntos
Antineoplásicos , Neoplasias , Antineoplásicos/farmacologia , Apamina , Ácido Elágico/farmacologia , Excipientes , Humanos , Lipídeos , Células MCF-7 , Tamanho da Partícula
4.
Bioorg Med Chem ; 38: 116136, 2021 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-33894490

RESUMO

Natural product produced by plants has been the backbone for numerous anticancer agents. In the present work, natural bioactive thymol based 1,2,3-triazole hybrids have been synthesized and evaluated for anticancer activity in MCF-7 and MDA-MB-231 cancer cells. The synthesized molecules displayed desired pharmacokinetic predictions for an orally available drug. Among the synthesized hybrids, compound 4-((2-isopropyl-5-methylphenoxy)methyl)-1-o-tolyl-1H-1,2,3-triazole (10) was the most potent (IC50 6.17 µM) showing comparable cytotoxity to tamoxifen (IC50 5.62 µM) and 3.2 fold inhibition to 5-fluorouracil (IC50 20.09 µM) against MCF-7 cancer cells. Whereas against MDA-MB-231 cancer cells, compound 10 (IC50 10.52 µM) and 3-(4-((2-isopropyl-5-methylphenoxy)methyl)-1H-1,2,3-triazol-1-yl)benzoic acid (12) (IC50 11.41 µM) displayed 1.42 and 1.3 fold inhibition, respectively to tamoxifen (IC50 15.01 µM) whereas 2.4 fold and 2.2 activity to 5-Florouracil (IC50 25.31 µM). Furthermore, 10 and 12 significantly inhibited thymidylate synthase enzyme with 2.4 and 1.26 fold activity to standard drug, Pemetrexed (IC50 5.39 µM) suggesting their mode of action as thymidylate synthase inhibitors. Cell cycle arrest and annexin V induced apoptosis study of compound 10 showed cell cycle arrest at the G2/M phase and induction of apoptosis in MCF-7 cells. The molecular docking was accomplished onto thymidylate synthase (TS) protein. The active compounds exhibited promising binding interactions and binding affinities into active sites. Finally, density functional theory (DFT) calculations including chemical reactivity and molecular electrostatic potential (MEP) have been performed to confirm the data obtained from docking and biological experiments. The results from this study inferred that compound 10 could be served as a lead molecule for the treatment of breast cancer.


Assuntos
Antineoplásicos/farmacologia , Neoplasias da Mama/tratamento farmacológico , Inibidores Enzimáticos/farmacologia , Simulação de Acoplamento Molecular , Timidilato Sintase/antagonistas & inibidores , Timol/farmacologia , Triazóis/farmacologia , Antineoplásicos/síntese química , Antineoplásicos/química , Apoptose/efeitos dos fármacos , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Desenho de Fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/química , Feminino , Células HEK293 , Humanos , Estrutura Molecular , Relação Estrutura-Atividade , Timidilato Sintase/metabolismo , Timol/química , Triazóis/síntese química , Triazóis/química
5.
J Enzyme Inhib Med Chem ; 36(1): 802-818, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33730937

RESUMO

A new series of quinoline derivatives of combretastatin A-4 have been designed, synthesised and demonstrated as tubulin polymerisation inhibitors. These novel compounds showed significant antiproliferative activities, among them, 12c exhibited the most potent inhibitory activity against different cancer cell lines (MCF-7, HL-60, HCT-116 and HeLa) with IC50 ranging from 0.010 to 0.042 µM, and with selectivity profile against MCF-10A non-cancer cells. Further mechanistic studies suggest that 12c can inhibit tubulin polymerisation and cell migration, leading to G2/M phase arrest. Besides, 12c induces apoptosis via a mitochondrial-dependant apoptosis pathway and caused reactive oxygen stress generation in MCF-7 cells. These results provide guidance for further rational development of potent tubulin polymerisation inhibitors for the treatment of cancer.HighlightsA novel series of quinoline derivatives of combretastatin A-4 have been designed and synthesised.Compound 12c showed significant antiproliferative activities against different cancer cell lines.Compound 12c effectively inhibited tubulin polymerisation and competed with [3H] colchicine in binding to tubulin.Compound 12c arrested the cell cycle at G2/M phase, effectively inducing apoptosis and inhibition of cell migration.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Descoberta de Drogas , Quinolinas/farmacologia , Estilbenos/farmacologia , Moduladores de Tubulina/farmacologia , Tubulina (Proteína)/metabolismo , Antineoplásicos/síntese química , Antineoplásicos/química , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Polimerização/efeitos dos fármacos , Quinolinas/síntese química , Quinolinas/química , Espécies Reativas de Oxigênio/metabolismo , Estilbenos/síntese química , Estilbenos/química , Relação Estrutura-Atividade , Moduladores de Tubulina/síntese química , Moduladores de Tubulina/química
6.
Environ Toxicol ; 36(6): 1217-1225, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33704910

RESUMO

Few studies have reported a prophylactic effect of the anti-ischemic trimetazidine (TRI) against cardiac toxicity caused by adriamycin (ADR). However, the mechanism of action of TRI remained incomplete. The cardioprotective mechanism(s) of TRI against ADR-induced cardiotoxicity was investigated in this study. Cardiotoxicity was induced in three groups of Wistar rats by injecting a single dose of ADR (10 mg/kg, i.p.). TRI was administered in two doses regimen, low (L) (2.5 mg/kg, i.p.) and high (H) (10 mg/kg, i.p.). The results of the study showed that both TRI L and H doses improved cardiac enzymes and pathology, while only the TRI H dose improved the electrocardiogram. Both TRI L and H doses decreased malondialdehyde and increased reduced glutathione and superoxide dismutase. Only TRI H dose increased glutathione peroxidase and catalase. Both TRI L and H doses decreased interleukin-1 beta and tumor necrosis factor-alpha (TNF-α). Both TRI L and H doses downregulated TNF-α, BAX, and vascular endothelial growth factor cardiac protein expression. The data obtained in this study provided evidence that TRI opposed ADR-induced cardiotoxicity. The mechanism could be due to improved antioxidant levels as well as inhibition of inflammation and programmed cell death.


Assuntos
Cardiomiopatias , Trimetazidina , Animais , Antioxidantes , Cardiomiopatias/induzido quimicamente , Cardiomiopatias/prevenção & controle , Doxorrubicina/toxicidade , Estresse Oxidativo , Ratos , Ratos Wistar , Fator de Necrose Tumoral alfa , Fator A de Crescimento do Endotélio Vascular , Proteína X Associada a bcl-2/genética
7.
Molecules ; 26(4)2021 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-33562080

RESUMO

The role of cannabinoid receptors in nephropathy is gaining much attention. This study investigated the effects of two neutral CB1 receptor antagonists, AM6545 and AM4113, on nephropathy associated with metabolic syndrome (MetS). MetS was induced in rats by high-fructose high-salt feeding for 12 weeks. AM6545, the peripheral silent antagonist and AM4113, the central neutral antagonist were administered in the last 4 weeks. At the end of study, blood and urine samples were collected for biochemical analyses while the kidneys were excised for histopathological investigation and transforming growth factor beta 1 (TGFß1) measurement. MetS was associated with deteriorated kidney function as indicated by the elevated proteinuria and albumin excretion rate. Both compounds equally inhibited the elevated proteinuria and albumin excretion rate while having no effect on creatinine clearance and blood pressure. In addition, AM6545 and AM4113 alleviated the observed swelling and inflammatory cells infiltration in different kidney structures. Moreover, AM6545 and AM4113 alleviated the observed histopathological alterations in kidney structure of MetS rats. MetS was associated with a ten-fold increase in urine uric acid while both compounds blocked this increase. Furthermore, AM6545 and AM4113 completely prevented the collagen deposition and the elevated expression of the TGFß1 seen in MetS animals. In conclusion, AM6545 and AM4113, possess reno-protective effects by interfering with TGFß1-mediated renal inflammation and fibrosis, via peripheral action.


Assuntos
Rim/efeitos dos fármacos , Rim/patologia , Síndrome Metabólica/tratamento farmacológico , Morfolinas/farmacologia , Pirazóis/farmacologia , Receptor CB1 de Canabinoide/metabolismo , Fator de Crescimento Transformador beta1/antagonistas & inibidores , Animais , Citoproteção/efeitos dos fármacos , Fibrose , Inflamação/metabolismo , Rim/metabolismo , Masculino , Síndrome Metabólica/metabolismo , Síndrome Metabólica/patologia , Morfolinas/uso terapêutico , Pirazóis/uso terapêutico , Ratos , Ácido Úrico/metabolismo
8.
AAPS PharmSciTech ; 22(5): 177, 2021 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-34128106

RESUMO

Fluvastatin (FLV) is known to inhibit the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA), which is over-expressed in various cancers. FLV has been reported to decrease cancer development and metastasis. However, because of low bioavailability, extensive first-pass metabolism and short half-life of FLV (1.2 h), it is not appropriate for clinical application. Therefore, FLV-loaded emulsomes were formulated and optimized using Box-Behnken experimental design to achieve higher efficiency of formulation. Antitumor activity of optimized FLV-loaded emulsomes was evaluated in prostate cancer cells using cell cytotoxicity, apoptotic activity, cell cycle analysis, and enzyme-linked immunosorbent assay. The FLV-loaded emulsomes exhibited a monodispersed size distribution with a mean particle size less than 100 nm as measured by zetasizer. The entrapment efficiency was found to be 93.74% with controlled drug release profile. FLV-EMLs showed a significant inhibitory effect on the viability of PC3 cells when compared to the free FLV (P < 0.0025). Furthermore, FLV-EMLs showed significant arrest in G2/M and increase in percentage of apoptotic cells as compared to free FLV. FLV-EMLs were more effective than free FLV in reducing mitochondrial membrane potential and increase in caspase-3 activity. These results suggesting that FLV-EMLs caused cell cycle arrest which clarifies its significant antiproliferative effect compared to the free drug. Therefore, optimized FLV-EMLs may be an effective carrier for FLV in prostate cancer treatment.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Citotoxinas/farmacologia , Portadores de Fármacos/farmacologia , Fluvastatina/farmacologia , Neoplasias da Próstata , Antineoplásicos/síntese química , Apoptose/fisiologia , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/fisiologia , Citotoxinas/síntese química , Preparações de Ação Retardada/síntese química , Preparações de Ação Retardada/farmacologia , Portadores de Fármacos/síntese química , Fluvastatina/síntese química , Humanos , Masculino , Células PC-3 , Tamanho da Partícula
9.
Saudi Pharm J ; 29(1): 53-58, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33603539

RESUMO

BACKGROUND: Integrating pharmacogenetics (PGx) testing into clinical practice leads to personalized medicine, which improves treatments' efficacy and safety. Successful implementation of such a service requires sufficient knowledge, perception, and self-confidence among healthcare providers, especially pharmacists. OBJECTIVES: To evaluate governmental hospital pharmacists' knowledge, perception, and self-confidence toward PGx testing in Jeddah, Kingdom of Saudi Arabia. METHOD: This cross-sectional study was conducted using previously validated questionnaire. Pharmacists working in five randomly selected general governmental hospitals in Jeddah between August and October 2019 were interviewed. Comparative and descriptive analyses were used to analyze the data, and the significance level was at P-value < 0.05. RESULTS: A total of 119 pharmacists with a mean (±SD) age of 31.2 (±5.05) years were included with a response rate of 79.3%. The average total mean (±SD) score for PGx knowledge-based questions was low (2.4 ± 1.09 out of 5). Most of the participants, with a total mean score of (10.1 ± 1.6 out of 12), revealed a positive perception toward PGx testing and its implications. A moderate self-confidence score for utilizing PGx testing (4.3 ± 2.3 out of 8) was observed among the participants. Pharmacists who had completed postgraduate studies had a statistically higher mean knowledge score (P = 0.006) compared with pharmacists with undergraduate degrees. CONCLUSION: Governmental hospital pharmacists have limited knowledge and understanding about PGx testing; however, the majority expressed a high level of awareness and agreed that PGx testing is a valuable tool for enhancing drug efficacy and safety. The study also highlighted the importance of improving pharmacists' knowledge about PGx testing, which will help them in implementing such a valuable service into their clinical practice in Saudi hospitals.

10.
J Enzyme Inhib Med Chem ; 35(1): 1116-1123, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32354237

RESUMO

Thymidylate synthase (TS) has been an attention-grabbing area of research for the treatment of cancers due to their role in DNA biosynthesis. In the present study, we have synthesised a library of thiazolidinedione-1,3,4-oxadiazole hybrids as TS inhibitors. All the synthesised hybrids followed Lipinski and Veber rules which indicated good drug likeness properties upon oral administration. Among the synthesised hybrids, compound 9 and 10 displayed 4.5 and 4.4 folds activity of 5-Fluorouracil, respectively against MCF-7 cell line whereas 3.1 and 2.5 folds cytotoxicity against HCT-116 cell line. Furthermore, compound 9 and 10 also inhibited TS enzyme with IC50 = 1.67 and 2.21 µM, respectively. Finally, the docking studies of 9 and 10 were found to be consistent with in vitro TS results. From these studies, compound 9 and 10 has the potential to be developed as TS inhibitors.


Assuntos
Antineoplásicos/farmacologia , Desenho de Fármacos , Inibidores Enzimáticos/farmacologia , Oxidiazóis/farmacologia , Tiazolidinedionas/farmacologia , Timidilato Sintase/antagonistas & inibidores , Antineoplásicos/síntese química , Antineoplásicos/química , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/química , Humanos , Simulação de Acoplamento Molecular , Estrutura Molecular , Oxidiazóis/síntese química , Oxidiazóis/química , Relação Estrutura-Atividade , Tiazolidinedionas/síntese química , Tiazolidinedionas/química , Timidilato Sintase/metabolismo
11.
Molecules ; 25(13)2020 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-32630784

RESUMO

Cisplatin is an anticancer drug commonly used for solid tumors. However, it causes nephrotoxicity. OAT1 and OAT3 are organic anion transporters known to contribute to the uptake of cisplatin into renal tubular cells. The present study was designed to examine the protective role of ellagic acid nanoformulation (ellagic acid nano) on cisplatin-induced nephrotoxicity in rats, and the role of OAT1/OAT3 in this effect. Four groups of male Wistar rats were used (n = 6): (1) control, (2) cisplatin (7.5 mg/kg single dose, intraperitoneal), (3) cisplatin + ellagic acid nano (1 mg/kg), and (4) cisplatin + ellagic acid nano (2 mg/kg). Nephrotoxic rats treated with ellagic acid nano exhibited a significant reduction in elevated serum creatinine, urea, and oxidative stress marker, malondialdehyde (MDA). Additionally, ellagic acid nano restored renal glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). Ellagic acid nano improved the histopathological changes induced by cisplatin, such as tubular dilatation, necrosis, and degeneration. Interestingly, OAT1 and OAT3 showed significantly lower expression at both mRNA and protein levels following ellagic acid nano treatment relative to the cisplatin-exposed group. These findings reveal a potential inhibitory role of ellagic acid antioxidant on OAT1 and OAT3 expression and thus explains its nephroprotective effect against cisplatin nephrotoxicity.


Assuntos
Cisplatino/efeitos adversos , Ácido Elágico/farmacologia , Rim/efeitos dos fármacos , Proteína 1 Transportadora de Ânions Orgânicos/metabolismo , Transportadores de Ânions Orgânicos Sódio-Independentes/metabolismo , Injúria Renal Aguda/induzido quimicamente , Injúria Renal Aguda/prevenção & controle , Animais , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Cisplatino/administração & dosagem , Cisplatino/farmacologia , Creatinina/sangue , Ácido Elágico/administração & dosagem , Ácido Elágico/química , Feminino , Rim/patologia , Masculino , Camundongos , NF-kappa B/genética , NF-kappa B/metabolismo , Nanoestruturas/administração & dosagem , Nanoestruturas/química , Proteína 1 Transportadora de Ânions Orgânicos/genética , Transportadores de Ânions Orgânicos Sódio-Independentes/genética , Substâncias Protetoras/farmacologia , Ratos Sprague-Dawley , Ureia/sangue , Ensaios Antitumorais Modelo de Xenoenxerto
12.
Medicina (Kaunas) ; 56(11)2020 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-33138155

RESUMO

Background and Objectives: Insulin resistance (IR) is a serious condition leading to development of diabetes and cardiovascular complications. Hyper-activation of cannabinoid receptors-1 (CB1) has been linked to the development of metabolic disorders such as IR. Therefore, the effect of blocking CB1 on the development of IR was investigated in the present study. Materials and Methods: A 12-week high-fructose/high-salt feeding model of metabolic syndrome was used to induce IR in male Wistar rats. For this purpose, two different CB1-antagonists were synthesized and administered to the rats during the final four weeks of the study, AM6545, the peripheral neutral antagonist and AM4113, the central neutral antagonist. Results: High-fructose/salt feeding for 12 weeks led to development of IR while both AM6545 and AM4113, administered in the last 4 weeks, significantly inhibited IR. This was correlated with increased animal body weight wherein both AM6545 and AM4113 decreased body weight in IR animals but with loss of IR/body weight correlation. While IR animals showed significant elevations in serum cholesterol and triglycerides with no direct correlation with IR, both AM6545 and AM4113 inhibited these elevations, with direct IR/cholesterol correlation in case of AM6545. IR animals had elevated serum uric acid, which was reduced by both AM6545 and AM4113. In addition, IR animals had decreased adiponectin levels and elevated liver TNFα content with strong IR/adiponectin and IR/TNFα correlations. AM6545 inhibited the decreased adiponectin and the increased TNFα levels and retained the strong IR/adiponectin correlation. However, AM4113 inhibited the decreased adiponectin and the increased TNFα levels, but with loss of IR/adiponectin and IR/TNFα correlations. Conclusions: Both CB1 neutral antagonists alleviated IR peripherally, and exerted similar effects on rats with metabolic syndrome. They also displayed anti-dyslipidemic, anti-hyperurecemic and anti-inflammatory effects. Overall, these results should assist in the development of CB1 neutral antagonists with improved safety profiles for managing metabolic disorders.


Assuntos
Resistência à Insulina , Síndrome Metabólica , Animais , Frutose/efeitos adversos , Masculino , Síndrome Metabólica/induzido quimicamente , Síndrome Metabólica/tratamento farmacológico , Morfolinas , Pirazóis , Ratos , Ratos Wistar , Receptor CB1 de Canabinoide , Ácido Úrico
13.
Int J Mol Sci ; 20(14)2019 Jul 12.
Artigo em Inglês | MEDLINE | ID: mdl-31336892

RESUMO

BACKGROUND: Mitogen-activated protein kinase phosphatase-2 (MKP-2) is a type 1 nuclear dual specific phosphatase (DUSP-4). It plays an important role in macrophage inflammatory responses through the negative regulation of Mitogen activated protein kinase (MAPK) signalling. However, information on the effect of MKP-2 on other aspect of macrophage function is limited. METHODS: We investigated the impact of MKP-2 in the regulation of several genes that are involved in function while using comparative whole genome microarray analysis in macrophages from MKP-2 wild type (wt) and knock out (ko) mice. RESULTS: Our data showed that the lack of MKP-2 caused a significant down-regulation of colony-stimulating factor-2 (Csf2) and monocyte to macrophage-associated differentiation (Mmd) genes, suggesting a role of MKP-2 in macrophage development. When treated with macrophage colony stimulating factor (M-CSF), Mmd and Csf2 mRNA levels increased but significantly reduced in ko cells in comparison to wt counterparts. This effect of MKP-2 deletion on macrophage function was also observed by cell counting and DNA measurements. On the signalling level, M-CSF stimulation induced extracellular signal-regulated kinases (ERK) phosphorylation, which was significantly enhanced in the absence of MKP-2. Pharmacological inhibition of ERK reduced both Csf2 and Mmd genes in both wild type and ko cultures, which suggested that enhanced ERK activation in ko cultures may not explain effects on gene expression. Interestingly other functional markers were also shown to be reduced in ko macrophages in comparison to wt mice; the expression of CD115, which is a receptor for M-CSF, and CD34, a stem/progenitor cell marker, suggesting global regulation of gene expression by MKP-2. CONCLUSIONS: Transcriptome profiling reveals that MKP-2 regulates macrophage development showing candidate targets from monocyte-to-macrophage differentiation and macrophage proliferation. However, it is unclear whether effects upon ERK signalling are able to explain the effects of DUSP-4 deletion on macrophage function.


Assuntos
Regulação da Expressão Gênica , Estudo de Associação Genômica Ampla , Macrófagos/metabolismo , Proteínas Tirosina Fosfatases/genética , Proteínas Tirosina Fosfatases/metabolismo , Deleção de Sequência , Transdução de Sinais , Animais , Biomarcadores , Biologia Computacional/métodos , Perfilação da Expressão Gênica , Imunofenotipagem , Lipopolissacarídeos/imunologia , Sistema de Sinalização das MAP Quinases , Ativação de Macrófagos/genética , Ativação de Macrófagos/imunologia , Macrófagos/imunologia , Camundongos , Camundongos Knockout , Análise em Microsséries
14.
Biochem Biophys Res Commun ; 499(4): 992-997, 2018 05 23.
Artigo em Inglês | MEDLINE | ID: mdl-29627571

RESUMO

BACKGROUND: Advanced glycation endproducts (AGEs) play a major role in the development of many vascular complications that are mediated by endothelial dysfunction. The present work aimed to investigate the mechanism by which AGEs impair vasodilation. METHODS: The effect of AGEs on vasodilation induced by acetylcholine or D NONOate was examined by incubating isolated rat aortae with different AGEs concentrations. ACh-induced nitric oxide generation was assessed using the fluorescent probe diaminofluorecein (DAF-FM). The effect of AGEs on expression of mRNA for arginase 2, NADPH oxidase and endothelial nitric oxide synthase (eNOS) were determined by real-time PCR. RESULTS: One-hour in vitro incubation of rat aortae with AGEs impaired endothelial-dependent vasodilation produced by ACh, while increasing D NONOate-induced vasodilation. Preincubation of aortae with l-ornithine, an arginase 2-inhibitor, prevented the impairment effect induced by AGEs on endothelial-dependent vasodilation. Superoxide scavenging by tempol or NADPH oxidase inhibition by apocynin also blocked the effect of AGEs. AGEs decreased ACh-induced NO production and this was inhibited by both l-ornithine and apocynin. Furthermore, AGEs exposure increased arginase mRNA expression but decreased mRNA expression for eNOS in isolated rat aortae. CONCLUSION: The present results indicate that AGEs impairs endothelial-dependent vasodilation, and this effect is mediated via arginase overexpression and NADPH oxidase stimulation.


Assuntos
Arginase/metabolismo , Produtos Finais de Glicação Avançada/toxicidade , Óxido Nítrico Sintase Tipo III/metabolismo , Vasodilatação/efeitos dos fármacos , Acetilcolina/farmacologia , Animais , Arginase/antagonistas & inibidores , Arginase/genética , Endotélio Vascular/efeitos dos fármacos , Endotélio Vascular/enzimologia , Regulação da Expressão Gênica/efeitos dos fármacos , Técnicas In Vitro , Masculino , Óxido Nítrico/biossíntese , Óxido Nítrico Sintase Tipo III/antagonistas & inibidores , Óxido Nítrico Sintase Tipo III/genética , Fenilefrina/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos Wistar , Superóxidos/metabolismo , Vasoconstrição/efeitos dos fármacos
16.
Naunyn Schmiedebergs Arch Pharmacol ; 397(3): 1791-1801, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-37740773

RESUMO

Gastric ulcer is one of the most frequent gastrointestinal ailments worldwide. Indomethacin, one of the most potent NSAIDs, suffers undesirable ulcerogenic activity. Caffeic acid phenethyl ester (CAPE) has known health benefits. The current study examined the potential of CAPE to combat indomethacin-induced gastric ulcers in rats. Animals were randomized into 5 groups: control, Indomethacin (50 mg/kg) mg/kg), Indomethacin + CAPE (5 mg/kg/day), Indomethacin + CAPE (10 mg/kg), and Indomethacin + Omeprazole (30 mg/kg). CAPE prevented the rise in ulcer index, attenuated histopathological changes and preserved gastric mucin concentration. CAPE efficiently significantly prevented accumulation of malondialdehude (MDA) and prevented exhaustion of the enzymatic activities of catalase (CAT) and superoxide dismutase (SOD). Further, CAPE prevented the rise in the expression of tumor necrosis factor-α (TNF-α), cyclo-oxygenase-2 (COX-2) and nuclear factor kapp-B (NFκB). This was associated with down-regulation of Bax and up-regulation of Bcl-2 mRNA. Finally, CAPE prevented induced indomethacin-induced decrease in heat shock protein 70 (HSP70) in gastric tissues. In conclusion, CAPE possesses the ability to prevent indomethacin-induced gastric ulcer in rats. This involves, at least partially, antioxidation, anti-inflammation, anti-apoptosis and enhancement of HSP70 expression.


Assuntos
Indometacina , Álcool Feniletílico/análogos & derivados , Úlcera Gástrica , Ratos , Animais , Indometacina/toxicidade , Úlcera Gástrica/induzido quimicamente , Úlcera Gástrica/tratamento farmacológico , Úlcera Gástrica/prevenção & controle , Antioxidantes/farmacologia , Ácidos Cafeicos/farmacologia , Ácidos Cafeicos/uso terapêutico
18.
Pharmaceutics ; 16(2)2024 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-38399356

RESUMO

The journal retracts the article "Lipidic Nano-Sized Emulsomes Potentiates the Cytotoxic and Apoptotic Effects of Raloxifene Hydrochloride in MCF-7 Human Breast Cancer Cells: Factorial Analysis and In Vitro Anti-Tumor Activity Assessment" [...].

19.
Heliyon ; 9(7): e18274, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37539264

RESUMO

Hypersensitivity reactions can be a side effect to any vaccine, but they are usually rare. The COVID-19 vaccination may cause hypersensitivity, and several cases of delayed hypersensitivity (DH) to hyaluronic acid (HA) dermal filler have been documented. The current report presents a case of a 36-year-old female patient with DH to HA dermal filler after receiving the Pfizer-BioNTech COVID-19 vaccine. Symptoms, including dryness, swelling, and a painless nodule, appeared after the first and second doses of the vaccine. The patient was treated with intralesional hyaluronidase and triamcinolone in the outpatient clinic. Although HA is relatively safe and routinely used in aesthetic medicine, DH reactions must be considered. Therefore, an appropriate patient history should be obtained, and physicians should provide counselling on the potential reactions to avoid these adverse effects.

20.
Drug Deliv ; 30(1): 2174209, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36762548

RESUMO

Andrographolide (AG), a major active constituent of Andrographis paniculata, is known to hinder proliferation of several types of cancer cells. However, its poor solubility and cellular permeability restrict its use in clinical applications. In this study, AG-loaded phytosomes (AG-PTMs) were formulated and optimized with respect to particle size using l-α-phosphatidylcholine (PC):AG ratio and sonication time (ST) as independent variables. The optimized formula was prepared at 1:2.7 for AG:PC molar ratio and 4.9 min for ST and exhibited a particle size of 243.7 ± 7.3 nm, polydispersity index (PDI) of 0.310 and entrapment efficiency of 72.20 ± 4.53. Also, the prepared formula showed a slow release of AG over 24-h period. The antiproliferative activity of AG-PTMs was investigated against the liver cancer cell line HepG2. AG-PTMs significantly repressed the growth of HepG2 cells with an IC50 value of 4.02 ± 0.14 µM. AG uptake by HepG2 cells was significantly enhanced in incubations containing the optimized formula. AG-PTMs also caused G2-M cell cycle phase arrest and increased the fraction of apoptotic cells in pre-G1 phase. These effects were associated with induction of oxidative stress and mitochondrial dysfunction. In addition, AG-PTMs significantly upregulated mRNA expression of BAX and downregulated that of BCL2. Furthermore, AG-PTMs significantly enhanced the concentration of caspase-3 in comparison to raw AG. These data indicate that the phytosomal delivery of AG significantly inhibited HepG2 cell proliferation through enhanced cellular uptake, arresting cell cycle at the G2-M phase and inducing mitochondrial-dependent apoptosis.


Assuntos
Diterpenos , Neoplasias Hepáticas , Humanos , Células Hep G2 , Proliferação de Células , Diterpenos/farmacologia , Apoptose , Pontos de Checagem da Fase G2 do Ciclo Celular , Neoplasias Hepáticas/tratamento farmacológico
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