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1.
Mediators Inflamm ; 2022: 5171525, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36091666

RESUMEN

Inflammation is the body's biological reaction to endogenous and exogenous stimuli. Recent studies have demonstrated several anti-inflammatory properties of Ferula species. In this paper, we decided to study the anti-inflammatory effect of ethanolic extract of Ferula assafoetida oleo-gum-resin (asafoetida) against TNF-α-stimulated human umbilical vein endothelial cells (HUVECs). HUVECs were cultured in a flat-bottom plate and then treated with ethanolic extract of asafoetida (EEA, 0-500 µg/ml) and TNF-α (0-100 ng/ml) for 24 h. We used the MTT test to assess cell survival. In addition, the LC-MS analysis was performed to determine the active substances. HUVECs were pretreated with EEA and then induced by TNF-α. Intracellular reactive oxygen species (ROS) and adhesion of peripheral blood mononuclear cells (PBMCs) to HUVECs were evaluated with DCFH-DA and CFSE fluorescent probes, respectively. Gene expression of intercellular cell adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and E-selectin and surface expression of ICAM-1 protein were measured using real-time PCR and flow cytometry methods, respectively. While TNF-α significantly increased intracellular ROS formation and PBMC adhesion to TNF-α-induced HUVECs, the pretreatment of HUVECs with EEA (125 and 250 µg/ml) significantly reduced the parameters. In addition, EEA pretreatment decreased TNF-α-induced mRNA expression of VCAM-1 and surface protein expression of ICAM-1 in the target cells. Taken together, the results indicated that EEA prevented ROS generation, triggered by TNF-α, and inhibited the expression of VCAM-1 and ICAM-1, leading to reduced PBMC adhesion. These findings suggest that EEA can probably have anti-inflammatory properties.


Asunto(s)
Antiinflamatorios , Moléculas de Adhesión Celular , Ferula , Células Endoteliales de la Vena Umbilical Humana , Extractos Vegetales , Antiinflamatorios/farmacología , Adhesión Celular , Moléculas de Adhesión Celular/biosíntesis , Moléculas de Adhesión Celular/genética , Moléculas de Adhesión Celular/inmunología , Selectina E/biosíntesis , Selectina E/genética , Selectina E/inmunología , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Células Endoteliales de la Vena Umbilical Humana/inmunología , Humanos , Molécula 1 de Adhesión Intercelular/biosíntesis , Molécula 1 de Adhesión Intercelular/genética , Molécula 1 de Adhesión Intercelular/inmunología , Leucocitos Mononucleares/inmunología , Extractos Vegetales/farmacología , Especies Reactivas de Oxígeno/inmunología , Factor de Necrosis Tumoral alfa/inmunología , Factor de Necrosis Tumoral alfa/farmacología , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Molécula 1 de Adhesión Celular Vascular/genética , Molécula 1 de Adhesión Celular Vascular/inmunología
2.
Biomolecules ; 10(9)2020 08 21.
Artículo en Inglés | MEDLINE | ID: mdl-32825714

RESUMEN

Twenty natural remedies traditionally used against different inflammatory diseases were probed for their potential to suppress the expression of the inflammatory markers E-selectin and VCAM-1 in a model system of IL-1 stimulated human umbilical vein endothelial cells (HUVEC). One third of the tested extracts showed in vitro inhibitory effects comparable to the positive control oxozeaenol, an inhibitor of TAK1. Among them, the extract derived from the roots and rhizomes of Peucedanum ostruthium (i.e., Radix Imperatoriae), also known as masterwort, showed a pronounced and dose-dependent inhibitory effect. Reporter gene analysis demonstrated that inhibition takes place on the transcriptional level and involves the transcription factor NF-κB. A more detailed analysis revealed that the P. ostruthium extract (PO) affected the phosphorylation, degradation, and resynthesis of IκBα, the activation of IKKs, and the nuclear translocation of the NF-κB subunit RelA. Strikingly, early effects on this pathway were less affected as compared to later ones, suggesting that PO may act on mechanism(s) that are downstream of nuclear translocation. As the majority of cognate NF-κB inhibitors affect upstream events such as IKK2, these findings could indicate the existence of targetable signaling events at later stages of NF-κB activation.


Asunto(s)
Antiinflamatorios/farmacología , Selectina E/antagonistas & inhibidores , Células Endoteliales/efectos de los fármacos , FN-kappa B/antagonistas & inhibidores , Plantas Medicinales/química , Molécula 1 de Adhesión Celular Vascular/antagonistas & inhibidores , Antiinflamatorios/química , Antiinflamatorios/aislamiento & purificación , Células Cultivadas , Selectina E/biosíntesis , Células Endoteliales/metabolismo , Humanos , FN-kappa B/metabolismo , Transducción de Señal/efectos de los fármacos , Molécula 1 de Adhesión Celular Vascular/biosíntesis
3.
Iran J Immunol ; 17(1): 64-74, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32224542

RESUMEN

BACKGROUND: Atherosclerosis is a chronic inflammation that interferes with blood arteries functions due to the accumulation of low density lipids and cholesterol. OBJECTIVE: To investigate the effect of aqueous extract and saponin fraction of Tribulus terrestris L. (TT) on the proteome and expression of intracellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin in the human umbilical vein endothelial cell (HUVEC) and human bone marrow endothelial cell (HBMEC) lines. METHODS: Two cell lines were cultured and induced with lipopolysaccharide (LPS). The primed cells were then treated with aqueous extract and saponin fraction of TT. The protein profile of the endothelial cells was assessed under normal and LPS-induced conditions using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and 2D gel electrophoresis (2-DE). The levels of VCAM-1, ICAM-1, and E-selectin were estimated by use of western blotting. RESULTS: LPS-induced HUVECs and HBMECs were shown to significantly increase the expression of ICAM-1, VCAM-1, and E-selectin in comparison to control groups. Our findings revealed that TT extract resulted in significantly more reduced levels of proteome (80 spots) as well as all the three mentioned proteins compared with the effect of saponin fraction alone. CONCLUSION: TT extract and its saponin fraction exerted anti-inflammatory effects on HUVEC and HBMEC lines and reduced the expression of ICAM-1, VCAM-1, and E-selectin. However, the anti-inflammatory effect of aqueous extract was greater than that of saponin fraction. Therefore, TT could be considered as a potential candidate for the treatment or prevention of atherosclerosis.


Asunto(s)
Selectina E/efectos de los fármacos , Células Endoteliales/efectos de los fármacos , Molécula 1 de Adhesión Intercelular/efectos de los fármacos , Extractos Vegetales/farmacología , Saponinas/farmacología , Molécula 1 de Adhesión Celular Vascular/efectos de los fármacos , Antiinflamatorios/farmacología , Células de la Médula Ósea/efectos de los fármacos , Células de la Médula Ósea/metabolismo , Células Cultivadas , Selectina E/biosíntesis , Células Endoteliales/metabolismo , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Humanos , Molécula 1 de Adhesión Intercelular/biosíntesis , Proteoma/efectos de los fármacos , Tribulus , Molécula 1 de Adhesión Celular Vascular/biosíntesis
4.
J Biochem Mol Toxicol ; 33(2): e22243, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30431687

RESUMEN

The aim of this study was to compare the potential renoprotective effects of turmeric (TM) and nano turmeric (NTM) with those of desferrioxamine (DSM) against copper sulfate (CS)-induced toxicity. Rats were administered a toxic dose of CS with TM, NTM, and DSM for 1 week. Next, serum-urea creatinine, uric acid, interleukin (IL)-10, c-reactive protein (CRP), and caspase-3 levels; renal nitric oxide (NO), glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), vascular cell adhesion molecule-1 (VCAM-1), kidney injury molecule (KIM)-1, signal transducer and activator of transcription 3 (STAT-3) protein expression; and nuclear factor (NF)-κB and B-cell lymphoma -2 (Bcl-2) messenger RNA expression levels were estimated. Administration of the investigated antioxidants downregulated the marked increase in urea, creatinine, uric acid, CRP, caspase-3, NO, MDA, VCAM-1, kidney injury molecule (KIM-1), STAT-3, NF-κB, and DNA fragmentation, and increased Bcl-2, IL-10, GSH, and SOD levels induced by CS. The histopathological examination confirmed the effects of the antioxidants on the investigated biochemical parameters. Interestingly, NTM exhibited a superior renoprotective effect, which was comparable with that of DSM. In conclusion, NTM was shown to be a promising candidate against CS-induced toxicity, and several molecular mechanisms were implicated in the CS-induced renotoxicity as well as the treatment effects of NTM.


Asunto(s)
Moléculas de Adhesión Celular/biosíntesis , Sulfato de Cobre/toxicidad , Curcumina/farmacología , Regulación de la Expresión Génica/efectos de los fármacos , Enfermedades Renales , Factor de Transcripción STAT3/biosíntesis , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Animales , Evaluación Preclínica de Medicamentos , Femenino , Enfermedades Renales/inducido químicamente , Enfermedades Renales/tratamiento farmacológico , Enfermedades Renales/metabolismo , Enfermedades Renales/patología , Ratas
5.
Med Sci Monit ; 23: 4760-4767, 2017 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-28976943

RESUMEN

BACKGROUND In China, the essential oil of the fruit, Fructus Alpiniae zerumbet (FAZ), is used to treat cardiovascular diseases. Recent in vitro studies have shown that the essential oil of FAZ (EOFAZ) can protect endothelial cells from injury. Because of the prevalence of diabetes mellitus and its effects on the cardiovascular system, the aim of this study was to investigate the mechanism of the effects of EOFAZ on human umbilical vein endothelial cells (HUVECs) treated with high levels of glucose in vitro. MATERIAL AND METHODS The lactate dehydrogenase (LDH) leakage assay was used to detect HUVEC injury. Tumor necrosis factor-alpha (TNF-α), interleukin-8 (IL-8), and nuclear transcription factor-kappa B (NF-κB) p65 subunit DNA-binding activity was detected. The expression of NF-κB pathway-associated proteins, intercellular adhesion molecule-1 (ICAM-1), and vascular cell adhesion molecule-1 (VCAM-1) was studied by Western blotting. The cellular location of NF-κB in HUVECs was evaluated using immunofluorescence. RESULTS Cell viability and LDH leakage assays showed that high glucose-induced HUVEC injury was reduced by EOFAZ. High glucose-induced secretion of IL-8, TNF-α, ICAM-1, and VCAM-1 was reduced, and translocation of the p65 subunit of NF-κB to the endothelial cell nucleus was inhibited by EOFAZ. Western blotting confirmed that EOFAZ blocked the activation of NF-κB induced by high glucose levels. EOFAZ reduced high glucose-induced p65/DNA binding to inhibit NF-κB activation. CONCLUSIONS The findings of this in vitro study showed that treatment of HUVECs with EOFAZ had a protective role against the effects of high glucose levels via the NF-κB signaling pathway.


Asunto(s)
Alpinia/metabolismo , Glucosa/efectos adversos , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Células Cultivadas , China , Endotelio Vascular/efectos de los fármacos , Frutas , Regulación de la Expresión Génica/efectos de los fármacos , Glucosa/metabolismo , Humanos , Proteínas I-kappa B/metabolismo , Molécula 1 de Adhesión Intercelular/biosíntesis , Medicina Tradicional China , FN-kappa B/metabolismo , Aceites Volátiles/farmacología , Sustancias Protectoras/farmacología , Transducción de Señal/efectos de los fármacos , Factor de Transcripción ReIA/metabolismo , Factor de Necrosis Tumoral alfa/metabolismo , Molécula 1 de Adhesión Celular Vascular/biosíntesis
6.
Medicine (Baltimore) ; 95(13): e3186, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-27043681

RESUMEN

Statins have beneficial effects on cerebral circulation and brain parenchyma during ischemic stroke and reperfusion. The primary hypothesis of this randomized parallel trial was that treatment with 80 mg/day of atorvastatin administered early at admission after acute atherosclerotic ischemic stroke could reduce serum levels of markers of immune-inflammatory activation of the acute phase and that this immune-inflammatory modulation could have a possible effect on prognosis of ischemic stroke evaluated by some outcome indicators. We enrolled 42 patients with acute ischemic stroke classified as large arteries atherosclerosis stroke (LAAS) randomly assigned in a randomized parallel trial to the following groups: Group A, 22 patients treated with atorvastatin 80 mg (once-daily) from admission day until discharge; Group B, 20 patients not treated with atorvastatin 80 mg until discharge, and after discharge, treatment with atorvastatin has been started. At 72 hours and at 7 days after acute ischemic stroke, subjects of group A showed significantly lower plasma levels of tumor necrosis factor-α, interleukin (IL)-6, vascular cell adhesion molecule-1, whereas no significant difference with regard to plasma levels of IL-10, E-Selectin, and P-Selectin was observed between the 2 groups. At 72 hours and 7 days after admission, stroke patients treated with atorvastatin 80 mg in comparison with stroke subjects not treated with atorvastatin showed a significantly lower mean National Institutes of Health Stroke Scale and modified Rankin scores. Our findings provide the first evidence that atorvastatin acutely administered immediately after an atherosclerotic ischemic stroke exerts a lowering effect on immune-inflammatory activation of the acute phase of stroke and that its early use is associated to a better functional and prognostic profile.


Asunto(s)
Atorvastatina/uso terapéutico , Isquemia Encefálica/tratamiento farmacológico , Mediadores de Inflamación/metabolismo , Inflamación/tratamiento farmacológico , Accidente Cerebrovascular/tratamiento farmacológico , Enfermedad Aguda , Anciano , Atorvastatina/farmacología , Biomarcadores , Isquemia Encefálica/etiología , Isquemia Encefálica/fisiopatología , Selectina E/biosíntesis , Femenino , Humanos , Inflamación/fisiopatología , Molécula 1 de Adhesión Intercelular/biosíntesis , Interleucina-10/biosíntesis , Interleucina-1beta/biosíntesis , Interleucina-6/biosíntesis , Arteriosclerosis Intracraneal/complicaciones , Masculino , Persona de Mediana Edad , Selectina-P/biosíntesis , Accidente Cerebrovascular/etiología , Accidente Cerebrovascular/fisiopatología , Factor de Necrosis Tumoral alfa/biosíntesis , Molécula 1 de Adhesión Celular Vascular/biosíntesis
7.
Exp Dermatol ; 25(2): 124-30, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26513635

RESUMEN

Fumaric acid esters, dimethyl fumarate (DMF) in particular, have been established for the therapy of psoriasis and, more recently, multiple sclerosis. In the light of therapy-limiting dose-dependent side effects, such as gastrointestinal irritation, reducing the effective doses of FAE is a worthwhile goal. In search of strategies to maintain the anti-inflammatory activity of DMF at reduced concentrations, we found that NF-κB inhibition augmented key anti-inflammatory effects of DMF in two complementary experimental settings in vitro. At non-toxic concentrations, both proteasome inhibition with bortezomib as well as blocking NF-κB activation through KINK-1, a small molecule inhibitor of IKKß-profoundly enhanced DMF-dependent inhibition of nuclear NF-κB translocation in TNFα-stimulated human endothelial cells. This resulted in significant and selective co-operative down-regulation of endothelial adhesion molecules crucial for leucocyte extravasation, namely E-selectin (CD62E), VCAM-1 (CD106) and ICAM-1 (CD54), on both mRNA and protein levels. Functionally, these molecular changes led to synergistically decreased rolling and firm adhesion of human lymphocytes on TNF-activated endothelial cells, as demonstrated in a dynamic flow chamber system. If our in vitro findings can be translated into clinical settings, it is conceivable that anti-inflammatory effects of DMF can be achieved with lower doses than currently used, thus potentially reducing unwanted side effects.


Asunto(s)
Antiinflamatorios/farmacología , Dimetilfumarato/farmacología , Células Endoteliales/efectos de los fármacos , FN-kappa B/antagonistas & inhibidores , Bortezomib/farmacología , Adhesión Celular , Relación Dosis-Respuesta a Droga , Evaluación Preclínica de Medicamentos , Sinergismo Farmacológico , Selectina E/biosíntesis , Selectina E/genética , Células Endoteliales/metabolismo , Regulación de la Expresión Génica/efectos de los fármacos , Hemorreología , Células Endoteliales de la Vena Umbilical Humana , Humanos , Técnicas In Vitro , Molécula 1 de Adhesión Intercelular/biosíntesis , Molécula 1 de Adhesión Intercelular/genética , Leucocitos/citología , Oxazinas/farmacología , Complejo de la Endopetidasa Proteasomal/efectos de los fármacos , Piridinas/farmacología , ARN Mensajero/biosíntesis , ARN Mensajero/genética , Transcripción Genética/efectos de los fármacos , Factor de Necrosis Tumoral alfa/farmacología , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Molécula 1 de Adhesión Celular Vascular/genética
8.
Arch Pharm Res ; 39(1): 83-93, 2016 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-26597859

RESUMEN

Atherosclerosis is a chronic inflammatory disease, the progression of which is associated with the increased expression of cell adhesion molecules on vascular smooth muscle cells (VSMCs). Lobastin is a new pseudodepsidone isolated from Stereocaulon alpinum, Antarctic lichen, which is known to have antioxidant and antibacterial activities. However, the nature of the biological effects of lobastin still remains unclear. In the present study, we examine the effect of lobastin on the expression of vascular cell adhesion molecules (VCAM-1) induced by TNF-α in the cultured mouse VSMC cell line, MOVAS-1. Pretreatment of VSMCs for 2 h with lobastin (0.1-10 µg/ml) concentration-dependently inhibited TNF-α-induced protein expression of VCAM-1. Lobastin also inhibited TNF-α-induced production of intracellular reactive oxygen species (ROS). Lobastin abrogated TNF-α-induced phosphorylation of p38 and ERK 1/2, but not JNK, and also inhibited TNF-α-induced NK-κB activation. In addition, lobastin suppressed TNF-α-induced IκB kinase activation, subsequent degradation of IκBα and nuclear translocation of p65 NF-κB. Our results indicate that lobastin downregulates the TNF-α-mediated induction of VCAM-1 in VSMC by inhibiting the p38, ERK 1/2 and NF-κB signaling pathways and intracellular ROS generation. Thus, lobastin may be an important regulator of inflammation in the atherosclerotic lesion and a novel therapeutic drug for the treatment of atherosclerosis.


Asunto(s)
Líquenes , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Músculo Liso Vascular/efectos de los fármacos , FN-kappa B/antagonistas & inhibidores , Extractos Vegetales/farmacología , Molécula 1 de Adhesión Celular Vascular , Proteínas Quinasas p38 Activadas por Mitógenos/antagonistas & inhibidores , Animales , Línea Celular , Supervivencia Celular/efectos de los fármacos , Supervivencia Celular/fisiología , Depsidos/química , Depsidos/aislamiento & purificación , Depsidos/farmacología , Relación Dosis-Respuesta a Droga , Regulación hacia Abajo/efectos de los fármacos , Regulación hacia Abajo/fisiología , Humanos , Lactonas/química , Lactonas/aislamiento & purificación , Lactonas/farmacología , Sistema de Señalización de MAP Quinasas/fisiología , Ratones , Músculo Liso Vascular/metabolismo , Miocitos del Músculo Liso/efectos de los fármacos , Miocitos del Músculo Liso/metabolismo , FN-kappa B/metabolismo , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismo
9.
Biosci Biotechnol Biochem ; 79(9): 1493-503, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26072928

RESUMEN

In our study, it has been detected in vivo and in vitro that GSPE reversed high glucose-induced the increase of ICAM-1 and VCAM-1. It is shown that by western blotting detection, GSPE significantly inhibited the activation of NF-κB induced by high glucose while there was significant decrease of the expression of PKC with GSPE intervention. By adding the NF-κB blocker PDTC and the PKC inhibitor peptide 19-31(10(-6) M), no significant difference was found in the levels of VCAM-1 and ICAM-1 among GSPE group, the PKC inhibitor peptide 19-31-added GSPE group and the PDTC-added GSPE group. So the conclusion could be drawn that PKC inhibition must be involved in GSPE decreasing the level of ICAM-1 and VCAM-1.We proved for the first time that GSPE prevented high glucose-induced the increase of ICAM-1 and VCAM-1 by PKC and NF-κB inhibition. These findings show a novel mechanism of the action GSPE preventing endothelial dysfunction, which may have clinical application values.


Asunto(s)
Endotelio Vascular/efectos de los fármacos , Extracto de Semillas de Uva/administración & dosificación , FN-kappa B/genética , Proantocianidinas/administración & dosificación , Proteína Quinasa C/genética , Animales , Endotelio Vascular/patología , Regulación de la Expresión Génica/efectos de los fármacos , Glucosa/toxicidad , Molécula 1 de Adhesión Intercelular/biosíntesis , Ratones , FN-kappa B/antagonistas & inhibidores , Proteína Quinasa C/antagonistas & inhibidores , Transducción de Señal , Molécula 1 de Adhesión Celular Vascular/biosíntesis
10.
Am J Physiol Lung Cell Mol Physiol ; 306(7): L635-44, 2014 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-24487388

RESUMEN

The phospholipase A2 activity of peroxiredoxin 6 is inhibited by the transition state analog, 1-hexadecyl-3-(trifluoroethyl)-sn-glycero-2-phosphomethanol (MJ33). This activity is required for the activation of NADPH oxidase, type 2. The present study evaluated the effect of MJ33 on manifestations of acute lung injury. Mice were injected intratracheally (IT) with LPS from Escherichia coli 0111:B4 (LPS, 1 or 5 mg/kg), either concurrently with LPS or 2 h later, and evaluated for lung injury 24 h later. MJ33 inhibited reactive oxygen species (ROS) generation by lungs when measured at 24 h after LPS. LPS at either a low or high dose significantly increased lung infiltration with inflammatory cells, secretion of proinflammatory cytokines (IL-6, TNF-α, and the chemokine macrophage inflammatory protein-2), expression of lung vascular cell adhesion molecule, lung permeability (protein in bronchoalveolar lavage fluid, leakage of FITC-dextran, lung wet-to-dry weight ratio), tissue lipid peroxidation (thiobarbituric acid reactive substances, 8-isoprostanes), tissue protein oxidation (protein carbonyls), and activation of NF-κB. MJ33, given either concurrently or 2 h subsequent to LPS, significantly reduced all of these measured parameters. Previous studies of toxicity showed a high margin of safety for MJ33 in the intact mouse. Thus we have identified MJ33 as a potent, nontoxic, and specific mechanism-based inhibitor of NADPH oxidase type 2-mediated ROS generation that protects mice against lung injury associated with inflammation.


Asunto(s)
Lesión Pulmonar Aguda/prevención & control , Glicerofosfatos/farmacología , NADPH Oxidasas/antagonistas & inhibidores , Lesión Pulmonar Aguda/inducido químicamente , Animales , Quimiocinas/metabolismo , Citocinas/metabolismo , Lipopolisacáridos , Pulmón/efectos de los fármacos , Pulmón/metabolismo , Ratones , FN-kappa B/biosíntesis , Peroxiredoxina VI/antagonistas & inhibidores , Especies Reactivas de Oxígeno/antagonistas & inhibidores , Molécula 1 de Adhesión Celular Vascular/biosíntesis
11.
Cell Adh Migr ; 7(2): 237-45, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23466865

RESUMEN

This study investigated the effects of purple sweet potato leaf extract (PSPLE) and its components, cyanidin and quercetin, on human aortic endothelial cells (HAECs) during the inflammatory process. HAECs were pretreated with 100 µg/mL PSPLE or 10 µM quercetin, cyanidin or aspirin for 18 h followed by TNF-α (2 ng/mL) for 6 h, and U937 cell adhesion was determined. Adhesion molecule expression and CD40 were evaluated; NFκB p65 protein localization and DNA binding were assessed. PSPLE, aspirin, cyanidin and quercetin significantly inhibited TNF-α-induced monocyte-endothelial cell adhesion (p < 0.05). Cyanidin, quercetin and PSPLE also significantly attenuated VCAM-1, IL-8 and CD40 expression, and quercetin significantly attenuated ICAM-1 and E-selectin expression (p < 0.05). Significant reductions in NFκB expression and DNA binding by aspirin, cyanidin and quercetin were also observed in addition to decreased expression of ERK1, ERK2 and p38 MAPK (p < 0.05). Thus, PSPLE and its components, cyanidin and quercetin, have anti-inflammatory effects through modulation of NFκB and MAPK signaling. Further in vivo studies are necessary to explore the possible therapeutic effects of PSPLE on atherosclerosis.


Asunto(s)
Adhesión Celular/efectos de los fármacos , Células Endoteliales/efectos de los fármacos , Inflamación/tratamiento farmacológico , Ipomoea batatas/química , Extractos Vegetales/farmacología , Antocianinas/farmacología , Antiinflamatorios no Esteroideos/farmacología , Antioxidantes/farmacología , Aorta/efectos de los fármacos , Aspirina/farmacología , Antígenos CD40/biosíntesis , Moléculas de Adhesión Celular/biosíntesis , Línea Celular , Selectina E/biosíntesis , Endotelio Vascular/citología , Endotelio Vascular/efectos de los fármacos , Endotelio Vascular/metabolismo , Humanos , Molécula 1 de Adhesión Intercelular/biosíntesis , Interleucina-8/biosíntesis , Proteína Quinasa 1 Activada por Mitógenos/biosíntesis , Proteína Quinasa 3 Activada por Mitógenos/biosíntesis , FN-kappa B/biosíntesis , Hojas de la Planta/química , Quercetina/farmacología , Factor de Transcripción ReIA/efectos de los fármacos , Factor de Transcripción ReIA/metabolismo , Factor de Necrosis Tumoral alfa/farmacología , Células U937 , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Proteínas Quinasas p38 Activadas por Mitógenos/biosíntesis
12.
Exp Physiol ; 98(5): 999-1008, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23335007

RESUMEN

Peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α) is emerging as a novel factor that plays a critical role in integrating signalling pathways in the control of cellular and systemic metabolism. We investigated the role of vascular expression of PGC-1α and related factors, such as sirtuin 1 (SIRT1), peroxisome proliferator-activated receptor γ (PPARγ) and adiponectin, during the atherosclerotic process. Endothelial function, vascular superoxide anion production and inflammatory mediators were also evaluated. This study was carried out in male New Zealand rabbits fed a diet containing 0.5% cholesterol and 14% coconut oil for 8 weeks. Animals developed mixed dyslipidaemia and atherosclerotic lesions, which were associated with endothelial dysfunction, aortic overproduction of superoxide anions and inflammation. Expression of PGC-1α, SIRT1, PPARγ and adiponectin was reduced (P<0.05) in aorta from atherosclerotic rabbits. Levels of PGC-1α were correlated negatively (P<0.05) with total cholesterol levels, aortic superoxide anion production and tumour necrosis factor-α expression, and positively (P<0.05) with maximal relaxation in response to acetylcholine. The observed results suggest that PGC-1α could be considered to be a link between the main atherosclerotic processes (endothelial dysfunction, oxidation and inflammation) and alterations of other factors involved in vascular wall integrity, such as SIRT1, PPARγ and adiponectin.


Asunto(s)
Aterosclerosis/fisiopatología , Factores de Transcripción/metabolismo , Adiponectina/biosíntesis , Animales , Aorta/metabolismo , Aterosclerosis/inducido químicamente , Aterosclerosis/patología , Antígenos CD36/biosíntesis , Colesterol en la Dieta , Aceite de Coco , Endotelio Vascular/efectos de los fármacos , Lípidos/sangre , Masculino , PPAR gamma/biosíntesis , Aceites de Plantas , Conejos , Sirtuina 1/biosíntesis , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Vasodilatación
13.
BJU Int ; 110(6 Pt B): E301-7, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-22520557

RESUMEN

UNLABELLED: What's known on the subject? and What does the study add? Pervasive inflammatory infiltrates, mainly composed of chronically activated T cells and monocytes/macrophages, have been observed in benign prostatic hyperplasia (BPH). Permixon®, a hexanic lipidosterolic extract of Serenoa repens (hexanic LSESr) used to treat urinary dysfunction in BPH patients, has anti-inflammatory activities. This paper provides new insights into the anti-inflammatory properties of Permixon®. We report that hexanic LSESr inhibits early steps of leukocyte infiltration in vitro by downregulating MCP-1/CCL2 and VCAM-1 expression. OBJECTIVE: To investigate the mechanisms by which hexanic lipidosterolic extract of Serenoa repens (hexanic LSESr) may prevent leukocyte infiltration in benign prostatic hyperplasia by studying its impact on monocyte chemoattractant protein 1/chemokine (C-C motif) ligand 2 (MCP-1/CCL2) and vascular cell adhesion molecule 1 (VCAM-1) expression in vitro. MATERIALS AND METHODS: After pretreatment with hexanic LSESr, human prostate (epithelial and myofibroblastic) cells and vascular endothelial cells were stimulated with proinflammatory cytokines. MCP-1/CCL2 and VCAM-1 mRNA expression was quantified by real-time PCR. ELISA kits were used to determine MCP-1/CCL2 levels in culture supernatants and VCAM-1 expression in living cells. RESULTS: Hexanic LSESr reduced MCP-1/CCL2 mRNA levels in both epithelial (BPH-1) and myofibroblastic (WPMY-1) prostate cell lines. Hexanic LSESr downregulated MCP1/CCL2 secretion by WPMY-1 cells in a concentration-dependent manner, more efficiently than Serenoa repens extracts obtained by supercritical carbon dioxide extraction. Hexanic LSESr inhibited tumour-necrosis-factor-α-induced MCP-1/CCL2 secretion by the human vascular endothelial cell line EAhy.926, as well as surface VCAM-1 protein expression, in a concentration-dependent manner. CONCLUSIONS: Hexanic LSESr impedes key steps of monocyte and T cell attraction and adherence by inhibiting MCP-1/CCL2 and VCAM-1 expression by human prostate and vascular cells in an inflammatory environment. These findings provide new insights into the anti-inflammatory effects of the hexanic lipidosterolic extract of Serenoa repens, Permixon®, in benign prostatic hyperplasia.


Asunto(s)
Quimiocina CCL2/antagonistas & inhibidores , Quimiocina CCL2/biosíntesis , Hexanos/farmacología , Extractos Vegetales/farmacología , Serenoa , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Molécula 1 de Adhesión Celular Vascular/efectos de los fármacos , Células Cultivadas , Humanos
14.
Immunopharmacol Immunotoxicol ; 34(5): 832-43, 2012 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-22385396

RESUMEN

The present study evaluates efficacy of Sida rhomboidea.Roxb (SR) leaves extract in ameliorating experimental atherosclerosis using in vitro and in vivo experimental models. Atherogenic (ATH) diet fed rats recorded significant increment in the serum total cholesterol (TC), triglycerides (TG), low-density lipoprotein (LDL), very LDL (VLDL), autoantibody against oxidized LDL (Ox-LDL), markers of LDL oxidation and decrement in high-density lipoprotein (HDL) along with increment in aortic TC and TG. The ex vivo LDL oxidation assay revealed an increased susceptibility of LDL isolated from ATH rats to undergo copper mediated oxidation. These set of changes were minimized by simultaneous co-supplementation of SR extract to ATH diet fed rats. Histopathology of aorta and immunolocalization studies recorded pronounced atheromatous plaque formation, vascular calcification, significant elastin derangements and higher expression of macrophage surface marker (F4/80), vascular cell adhesion molecule-1 (VCAM-1) and p-selectin in ATH rats. Whereas, ATH+SR rats depicted minimal evidence of atheromatous plaque formation, calcium deposition, distortion/defragmentation of elastin and accumulation of macrophages along with lowered expression of VCAM-1 and P-selectin compared to ATH rats. Further, monocyte to macrophage differentiation and in vitro foam cell formation were significantly attenuated in presence of SR extract. In conclusion, SR extract has the potency of controlling experimental atherosclerosis and can be used as promising herbal supplement in combating atherosclerosis.


Asunto(s)
Aterosclerosis/tratamiento farmacológico , Diferenciación Celular/efectos de los fármacos , Regulación hacia Abajo/efectos de los fármacos , Células Espumosas/metabolismo , Malvaceae/química , Extractos Vegetales/farmacología , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Animales , Aterosclerosis/sangre , Aterosclerosis/inducido químicamente , Aterosclerosis/patología , Dieta Aterogénica/efectos adversos , Modelos Animales de Enfermedad , Células Espumosas/patología , Lípidos/sangre , Masculino , Monocitos/metabolismo , Monocitos/patología , Selectina-P/biosíntesis , Extractos Vegetales/química , Placa Aterosclerótica/sangre , Placa Aterosclerótica/inducido químicamente , Placa Aterosclerótica/tratamiento farmacológico , Placa Aterosclerótica/patología , Ratas , Ratas Sprague-Dawley
15.
Immunopharmacol Immunotoxicol ; 34(3): 443-53, 2012 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21961520

RESUMEN

Present inventory evaluates the anti-atherogenic potential of C. glandulosum.Coleb leaf extract (CG) using in vivo and in vitro experimental models. Serum markers of low density lipoprotein (LDL-C) oxidation, cholesterol, triglycerides, lipoproteins, auto-antibody titer, ex vivo LDL-C oxidation, LDL-C aggregation, aortic lipids, histopathological evaluations and immunolocalization of macrophage surface marker (F4/80), vascular cell adhesion molecule-1 (VCAM-1) and P-selectin were performed in CON [rats treated with single dose of saline (i.p.) and fed with laboratory chow], ATH [rats treated with single dose of vitamin D3 (600,000 IU, i.p) and fed with atherogenic diet] and ATH+CG [rats treated with single dose of vitamin D3 (600,000 IU, i.p.) and fed with atherogenic diet and simultaneously treated with 200 mg/kg CG extract, p.o.] for 8 weeks. CG extract supplementation to atherogenic diet fed rats significantly prevented increment in serum cholesterol, triglycerides, and lipoproteins, markers of LDL-C oxidation, auto-antibody titer and aortic lipids. Also, LDL-C isolated from ATH+CG rats recorded mimimal aggregation and susceptibility to undergo ex vivo LDL-C oxidation. Microscopic evaluation of thoracic aorta of ATH+CG rats reveled prevention of atheromatous plaque formation, accumulation of lipid laden macrophages, calcium deposition, distortion/defragmentation of elastin, accumulation of macrophages and, down regulation of cell adhesion molecules (VCAM-1 and P-selectin) expression. Further, in vitro monocyte to macrophage differentiation was significantly attenuated in presence of CG extract (200 µg/mL). It can be concluded from the present study that, CG extract is capable of controlling induction of experimental atherosclerosis and warrants further scrutiny at the clinical level as a possible therapeutic agent.


Asunto(s)
Aorta Torácica/metabolismo , Diferenciación Celular/efectos de los fármacos , Clerodendrum/química , Dieta Aterogénica/efectos adversos , Regulación hacia Abajo/efectos de los fármacos , Macrófagos/metabolismo , Selectina-P/biosíntesis , Extractos Vegetales/farmacología , Hojas de la Planta/química , Placa Aterosclerótica/tratamiento farmacológico , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Animales , Aorta Torácica/patología , Autoanticuerpos/sangre , Calcio/sangre , Lípidos/sangre , Macrófagos/patología , Masculino , Oxidación-Reducción/efectos de los fármacos , Extractos Vegetales/química , Placa Aterosclerótica/sangre , Placa Aterosclerótica/inducido químicamente , Placa Aterosclerótica/patología , Ratas , Ratas Sprague-Dawley
16.
Clin Sci (Lond) ; 119(3): 131-42, 2010 May 06.
Artículo en Inglés | MEDLINE | ID: mdl-20337596

RESUMEN

BH4 (tetrahydrobiopterin) supplementation improves endothelial function in models of vascular disease by maintaining eNOS (endothelial nitric oxide synthase) coupling and NO (nitric oxide) bioavailability. However, the cellular mechanisms through which enhanced endothelial function leads to reduced atherosclerosis remain unclear. We have used a pharmaceutical BH4 formulation to investigate the effects of BH4 supplementation on atherosclerosis progression in ApoE-KO (apolipoprotein E-knockout) mice. Single oral dose pharmacokinetic studies revealed rapid BH4 uptake into plasma and organs. Plasma BH4 levels returned to baseline by 8 h after oral dosing, but remained markedly increased in aorta at 24 h. Daily oral BH4 supplementation in ApoE-KO mice from 8 weeks of age, for a period of 8 or 12 weeks, had no effect on plasma lipids or haemodynamic parameters, but significantly reduced aortic root atherosclerosis compared with placebo-treated animals. BH4 supplementation significantly reduced VCAM-1 (vascular cell adhesion molecule 1) mRNA levels in aortic endothelial cells, markedly reduced the infiltration of T-cells, macrophages and monocytes into plaques, and reduced T-cell infiltration in the adjacent adventitia, but importantly had no effect on circulating leucocytes. GCH (GTP cyclohydrolase I)-transgenic mice, with a specific increase in endothelial BH4 levels, exhibited a similar reduction in vascular immune cell infiltration compared with BH4-deficient controls, suggesting that BH4 reduces vascular inflammation via endothelial cell signalling. In conclusion, BH4 supplementation reduces vascular immune cell infiltration in atherosclerosis and may therefore be a rational therapeutic approach to reduce the progression of atherosclerosis.


Asunto(s)
Enfermedades de la Aorta/tratamiento farmacológico , Apolipoproteínas E/deficiencia , Aterosclerosis/tratamiento farmacológico , Biopterinas/análogos & derivados , Administración Oral , Animales , Enfermedades de la Aorta/inmunología , Enfermedades de la Aorta/metabolismo , Apolipoproteínas E/genética , Aterosclerosis/inmunología , Aterosclerosis/metabolismo , Biopterinas/farmacocinética , Biopterinas/uso terapéutico , Quimiotaxis de Leucocito/efectos de los fármacos , Progresión de la Enfermedad , Esquema de Medicación , Evaluación Preclínica de Medicamentos , Endotelio Vascular/metabolismo , Hemodinámica/efectos de los fármacos , Lípidos/sangre , Masculino , Ratones , Ratones Noqueados , ARN Mensajero/genética , Distribución Tisular , Molécula 1 de Adhesión Celular Vascular/biosíntesis , Molécula 1 de Adhesión Celular Vascular/metabolismo
17.
Free Radic Biol Med ; 48(8): 1013-23, 2010 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-20083195

RESUMEN

Although nonsteroidal anti-inflammatory drugs (NSAIDs) provide important control of pain and inflammation, they have been overshadowed by concerns regarding atherothrombotic complications. However, celecoxib seems to have a relatively good cardiovascular profile and may improve endothelial function in coronary heart disease. This led us to the hypothesis that celecoxib induces the vasculoprotective enzyme heme oxygenase-1 (HO-1). In human umbilical vein and aortic endothelial cells, 24-48 h treatment with celecoxib induced HO-1 mRNA and protein expression and increased HO-1 enzyme activity. This effect was not seen with rofecoxib or indomethacin. Supplementation of culture medium with iloprost or prostaglandin E(2) failed to reverse celecoxib-mediated HO-1 induction, indicating a cyclooxygenase-independent mechanism. Rather, this action of celecoxib involved generation of mitochondria-derived reactive oxygen species, Akt phosphorylation, and nuclear translocation of the transcription factor Nrf2, with N-acetylcysteine, PI-3K antagonist LY290042, and dominant-negative Akt abrogating the effects. Furthermore, celecoxib-induced HO-1 was inhibited by dominant-negative Nrf2. The functional significance of HO-1 induction was revealed by celecoxib-mediated inhibition of VCAM-1 expression, a response reversed by the HO-1 antagonist zinc protoporphyrin. HO-1 induction provides a molecular mechanism for clinical observations indicating relative freedom from atherothrombotic complications in patients taking celecoxib compared to other NSAIDs with comparable anti-inflammatory activity.


Asunto(s)
Hemo-Oxigenasa 1/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Pirazoles/farmacología , Sulfonamidas/farmacología , Acetilcisteína/farmacología , Celecoxib , Cromonas/farmacología , Células Endoteliales/efectos de los fármacos , Inducción Enzimática , Humanos , Lactonas/farmacología , Morfolinas/farmacología , Factor 2 Relacionado con NF-E2/farmacología , Oxidación-Reducción , Transporte de Proteínas/efectos de los fármacos , Protoporfirinas/farmacología , Transducción de Señal/efectos de los fármacos , Sulfonas/farmacología , Factor de Necrosis Tumoral alfa/antagonistas & inhibidores , Molécula 1 de Adhesión Celular Vascular/biosíntesis
18.
Vascul Pharmacol ; 51(4): 215-24, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19539051

RESUMEN

The current study explored if alpha-iso-cubebene, a novel cubebene sesquiterpene compound purified from Schisandra chinensis, could attenuate the activities of adhesion molecules in tumor necrosis factor-alpha (TNF-alpha)-stimulated human umbilical vein endothelial cells (HUVECs). The study was performed on HUVECs that were pretreated with 25 microg/ml of alpha-iso-cubebene before TNF-alpha treatment. Treatment of HUVECs with alpha-iso-cubebene for 6 h significantly inhibited TNF-alpha-induced reactive oxygen species (ROS) formation. HUVECs treated with alpha-iso-cubebene showed markedly suppressed TNF-alpha-induced mRNA expression of VCAM-1 and E-selectin, but little alteration in ICAM-1 mRNA expression. alpha-iso-Cubebene treatment also significantly decreased the TNF-alpha-induced cell surface and total protein expression of VCAM-1 and E-selectin without affecting ICAM-1 expression. In addition, treatment of HUVECs with alpha-iso-cubebene markedly reduced U937 monocyte adhesion to TNF-alpha-stimulated HUVECs. alpha-iso-Cubebene treatment did not affect translocation of NF-kappaB transcription factor from the cytosol into the nucleus. However, alpha-iso-cubebene significantly inhibited NF-kappaB transcription factor activation in TNF-alpha-stimulated HUVECs. The new anti-inflammatory agent alpha-iso-cubebene attenuates TNF-alpha-stimulated endothelial adhesion to monocytes by inhibiting intracellular ROS production, the activation of redox-sensitive NF-kappaB transcription factor and expression of VCAM-1 and E-selectin. Based on these findings, alpha-iso-cubebene is proposed as an effective new anti-inflammatory agent that may have a potential therapeutic use for the prevention and treatment of vascular diseases.


Asunto(s)
Antiinflamatorios no Esteroideos/farmacología , Endotelio Vascular/efectos de los fármacos , Mediadores de Inflamación/farmacología , Schisandra , Sesquiterpenos/farmacología , Antiinflamatorios no Esteroideos/aislamiento & purificación , Adhesión Celular/efectos de los fármacos , Adhesión Celular/fisiología , Supervivencia Celular/efectos de los fármacos , Supervivencia Celular/fisiología , Células Cultivadas , Endotelio Vascular/citología , Endotelio Vascular/fisiología , Humanos , Mediadores de Inflamación/aislamiento & purificación , Extractos Vegetales/aislamiento & purificación , Extractos Vegetales/farmacología , Especies Reactivas de Oxígeno/antagonistas & inhibidores , Especies Reactivas de Oxígeno/metabolismo , Sesquiterpenos/aislamiento & purificación , Molécula 1 de Adhesión Celular Vascular/biosíntesis
19.
Exp Biol Med (Maywood) ; 234(5): 553-61, 2009 May.
Artículo en Inglés | MEDLINE | ID: mdl-19234052

RESUMEN

Chios mastic gum (CMG) is a white, semitransparent, natural resin that is obtained as a trunk exudate from mastic trees. Triterpenic compounds and phytosterols like tirucallol are among its major components. CMG has been associated with cardiovascular protection, exerting its effect mainly through increasing the antioxidant defense system, and effectively lowering the levels of serum cholesterol in human subjects. However, data on its anti-inflammatory effect on endothelium are scarce. Attachment of leukocytes to the vascular endothelium and the subsequent migration of cells into the vessel wall are early events in atherogenesis, and this process requires the expression of endothelial adhesion molecules. In this study, we examined the effect of CMG neutral extract (25-200 microg/ml) and tirucallol (0.1-100 microM) on the following: 1) the expression of adhesion molecules (VCAM-1 and ICAM-1) by Cell ELISA and 2) the attachment of monocytes (U937 cells) in TNF-alpha stimulated Human Aortic Endothelial Cells (HAEC) by Adhesion assay. The impact of treatment with CMG neutral extract and tirucallol in NFkB phosphorylation was also examined by a cell-based ELISA kit. Both CMG extract and tirucallol inhibit significantly VCAM-1 and ICAM-1 expression in TNF-alpha-stimulated HAEC. They also inhibit significantly the binding of U937 cells to TNF-alpha-stimulated HAEC and attenuate the phosphorylation of NFkB p65. This study extends existing data regarding the cardioprotective effect of CMG, expands the spectrum of known phytosterols with potent antiatheromatic activity, provides new insight into the mechanisms underlying the beneficial effect of CMG on endothelial function, and may aid in design of new therapy for intervention in atherosclerosis.


Asunto(s)
Antiinflamatorios/farmacología , Aorta/metabolismo , Células Endoteliales/metabolismo , Fitosteroles/farmacología , Pistacia , Extractos Vegetales/farmacología , Resinas de Plantas/farmacología , Triterpenos/farmacología , Antiinflamatorios/química , Aorta/patología , Aterosclerosis/tratamiento farmacológico , Aterosclerosis/metabolismo , Aterosclerosis/patología , Adhesión Celular/efectos de los fármacos , Movimiento Celular/efectos de los fármacos , Evaluación Preclínica de Medicamentos , Células Endoteliales/patología , Regulación de la Expresión Génica/efectos de los fármacos , Humanos , Molécula 1 de Adhesión Intercelular/biosíntesis , Leucocitos/metabolismo , Leucocitos/patología , Resina Mástique , FN-kappa B/metabolismo , Fosforilación/efectos de los fármacos , Fitosteroles/química , Extractos Vegetales/química , Resinas de Plantas/química , Triterpenos/química , Factor de Necrosis Tumoral alfa/farmacología , Células U937 , Molécula 1 de Adhesión Celular Vascular/biosíntesis
20.
Assay Drug Dev Technol ; 6(4): 557-67, 2008 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-18795873

RESUMEN

We evaluated the performance of two plate readers (the Beckman Coulter [Fullerton, CA] DTX and the PerkinElmer [Wellesley, MA] EnVision) and a plate imager (the General Electric [Fairfield, CT] IN Cell 1000 Analyzer) in a primary fluorescent cellular screen of 10,000 Molecular Libraries Screening Center Network library compounds for up- and down-regulation of vascular cell adhesion molecule (VCAM)-1, which has been shown to be up-regulated in atherothrombotic vascular disease and is a general indicator of chronic inflammatory disease. Prior to screening, imaging of a twofold, six-step titration of fluorescent cells in a 384-well test plate showed greater consistency, sensitivity, and dynamic range of signal detection curves throughout the detection range, as compared to the plate readers. With the same 384-well test plate, the detection limits for fluorescent protein-labeled cells on the DTX and EnVision instruments were 2,250 and 560 fluorescent cells per well, respectively, as compared to 280 on the IN Cell 1000. During VCAM screening, sensitivity was critical for detection of antagonists, which reduced brightness of the primary immunofluorescence readout; inhibitor controls yielded Z' values of 0.41 and 0.16 for the IN Cell 1000 and EnVision instruments, respectively. The best 1% of small molecule inhibitors from all platforms were visually confirmed using images from the IN Cell 1000. The EnVision and DTX plate readers mutually identified approximately 57% and 21%, respectively, of the VCAM-1 inhibitors visually confirmed in the IN Cell best 1% of inhibitors. Furthermore, the plate reader hits were largely exclusive, with only 6% agreement across all platforms (three hits out of 47). Taken together, the imager outperformed the plate readers at hit detection in this bimodal assay because of superior sensitivity and had the advantage of speeding hit confirmation during post-acquisition analysis.


Asunto(s)
Evaluación Preclínica de Medicamentos/instrumentación , Automatización , Movimiento Celular/fisiología , Colorantes , Regulación hacia Abajo , Evaluación Preclínica de Medicamentos/métodos , Procesamiento de Imagen Asistido por Computador , Indicadores y Reactivos , Microscopía Fluorescente , Reproducibilidad de los Resultados , Linfocitos T/metabolismo , Linfocitos T/fisiología , Factor de Necrosis Tumoral alfa/biosíntesis , Regulación hacia Arriba , Molécula 1 de Adhesión Celular Vascular/biosíntesis
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