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1.
J Chromatogr Sci ; 61(7): 605-611, 2023 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-36214345

RESUMEN

A simple, rapid, sensitive and specific gas chromatography-tandem mass spectrometry (GC-MS/MS) method was developed for quantitation of salbutamol in human urine using salbutamol-d3 as the internal standard. The processing of urines samples includes deconjugation with enzymatic hydrolysis, solid phase extraction procedure utilizing XAD2 column and liquid-liquid extraction accompanied by the derivatization by means of MSTFA/IODO-TMS/DTE mixture. The GC column was a HP Ultra-1 (17 m × 0.22 mm × 0.11 µm) used to separate the peak of interest. The data for GC-MS/MS were acquired and processed utilizing GC Labs Solution and Insight GCMS Software. The detection of spectra was performed on TQ 8050. This method included a chromatographic run of 13.67 min and the linearity was found over the concentration range of 250-2000 ng/mL with a regression coefficient (r2) of 0.99. The coefficient of variation for intra and interday assay precision was between 1.85 and 2.85% and the accuracy was between 95.50 and 107.04% for low quality control (QC), medium QC and high QC. The recovery was adequate to reliable detect the analyte at or below the level recommended by the World Anti-Doping Agency i.e., threshold 1000 ng/mL. The limit of detection and limit of quantification were found to be 10 and 100 ng/mL, respectively. The expanded measurement uncertainty (Uexp%) was found to be 8.28%.


Asunto(s)
Albuterol , Espectrometría de Masas en Tándem , Humanos , Espectrometría de Masas en Tándem/métodos , Cromatografía de Gases y Espectrometría de Masas , Incertidumbre , Cromatografía Liquida/métodos
2.
Heliyon ; 5(6): e01955, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31294107

RESUMEN

In recent years, polysaccharide-decorated superparamagnetic iron oxide nanoparticles (SPIONs) have gained attention in the field of "nanotheranostics" with integrated diagnostic and therapeutic functions. Carboxymethyl Assam bora rice starch-stabilized SPIONs (CM-ABRS SPIONs), synthesized by co-precipitation method, has already shown exciting potential towards magnetic drug targeting potential. After establishing it as a promisable targeting carrier, the present study is focused on the next step i.e. to evaluate its In vitro anti-tumor potential by loading anticancer drug "Doxorubicin hydrochloride (DOX)" onto CM-ABRS SPIONs. DOX-loaded CM-ABRS SPIONs were physico-chemically characterized by DLS, zeta-potential, TEM, FT-IR, XRD, and VSM analysis. Spectroflourimetric analysis confirmed the maximum loading of DOX up to 6% (w/w) onto CM-ABRS SPIONs via electrostatic interactions. Further, molecular level drug performance was investigated by docking study against receptors (HER-2 and Folate receptor-α) over expressed in cancer cells and MTT assay (in MCF-7 and HeLa cell line), which conferred promisable results of DOX-CM-ABRS SPIONs as compared to standard DOX solution.

3.
Bioorg Chem ; 78: 158-169, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-29571113

RESUMEN

A new series of benzimidazole linked pyrazole derivatives were synthesized by cyclocondensation reaction through one-pot multicomponent reaction in absolute ethanol. All the synthesized compounds were tested for their in vitro anticancer activities on five human cancer cell lines including MCF-7, HaCaT, MDA-MB231, A549 and HepG2. EGFR receptor inhibitory activities were carried out for all the compounds. Majority of the compounds showed potent antiproliferative activity against the tested cancer cell lines. Compound 5a showed the most effective activity against the lungs cancer cell lines (IC50 = 2.2 µM) and EGFR binding (IC50 = 0.97 µM) affinity as compared to other members of the series. Compound 5a inhibited growth of A549 cancer cells by inducing a strong G2/M phase arrest. In addition, same compound inhibited growth of A549 cancer cells by inducing apoptosis. In molecular docking studies compound 5a was bound to the active pocket of the EGFR (PDB 1M17) with five key hydrogen bonds and two π-π interaction with binding energies ΔG = -34.581 Kcal/mol.


Asunto(s)
Antineoplásicos/farmacología , Bencimidazoles/farmacología , Inhibidores de Proteínas Quinasas/farmacología , Pirazoles/farmacología , Animales , Antineoplásicos/síntesis química , Antineoplásicos/química , Apoptosis/efectos de los fármacos , Bencimidazoles/síntesis química , Bencimidazoles/química , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Receptores ErbB/antagonistas & inhibidores , Receptores ErbB/metabolismo , Femenino , Humanos , Hígado/efectos de los fármacos , Hígado/metabolismo , Simulación del Acoplamiento Molecular , Fosforilación/efectos de los fármacos , Inhibidores de Proteínas Quinasas/síntesis química , Inhibidores de Proteínas Quinasas/química , Pirazoles/síntesis química , Pirazoles/química , Ratas , Relación Estructura-Actividad
4.
Bioorg Chem ; 77: 74-83, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29334622

RESUMEN

A series of new hybrid benzothiazole containing pyridazinones derivatives were designed and synthesized fulfilling all the pharmacophoric requirements essential for the anticonvulsant activity. In-silico and in vitro studies revealed that some of these hybrid derivatives demonstrated admirable GABA AT inhibitory activity. An attempt has also been made to validate the results of in vitro GABA AT inhibition of the most potent compound SPS-5F (IC50 9.10 µM) through in vivo anticonvulsant screening. Compound SPS-5F administration significantly increases the whole brain GABA level, might be through the inhibition of GABA AT enzyme.


Asunto(s)
Anticonvulsivantes/farmacología , Diseño de Fármacos , Piridazinas/farmacología , Convulsiones/tratamiento farmacológico , Animales , Anticonvulsivantes/síntesis química , Anticonvulsivantes/química , Encéfalo/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Ratones , Estructura Molecular , Piridazinas/síntesis química , Piridazinas/química , Relación Estructura-Actividad
5.
AAPS PharmSciTech ; 19(1): 134-147, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-28631252

RESUMEN

Carboxymethyl Assam Bora rice starch (CM-ABRS) was chemically synthesized in non-aqueous medium with the optimum degree of substitution (DS) of 1.23, and physicochemically characterized by FT-IR, DSC, XRD, and SEM analysis. Comparative evaluation of CM-ABRS with native starch (ABRS) for powder flow characteristics, swelling index, apparent solubility, rheological properties, textural properties, and mucoadhesive studies were carried out. The aim of the current work was to investigate the potential of CM-ABRS as a novel carrier for the water-soluble chemotherapeutic, doxorubicin hydrochloride (DOX). Formation of drug/polymer complex (DOX-CM-ABRS) via electrostatic interaction has been evaluated for the controlled release of DOX in three different pH media (phosphate-buffered saline (PBS), pH 7.4, 6.8, and 5.5). In vitro drug release studies illustrated faster release of drug in PBS at pH 5.5 as compared to pH 6.8 and pH 7.4, respectively, indicating the importance of pH-sensitive drug release from the DOX-CM-ABRS complex in malignant tissues.


Asunto(s)
Antibióticos Antineoplásicos/administración & dosificación , Doxorrubicina/administración & dosificación , Portadores de Fármacos/química , Preparaciones de Acción Retardada , Portadores de Fármacos/síntesis química , Liberación de Fármacos , Concentración de Iones de Hidrógeno , Oryza , Solubilidad , Almidón/química , Electricidad Estática
6.
Bioorg Chem ; 71: 181-191, 2017 04.
Artículo en Inglés | MEDLINE | ID: mdl-28215601

RESUMEN

New N3-benzylidene (substituted)-2-phenyl-N4-(thiazol-2-yl)-quinazoline-3,4-(4H)-diamine derivatives were design and synthesized by a sequence of reactions starting from appropriate 6-methyl anthranilic acid. The title compounds were screened for in vitro dipeptidyl peptidase IV (DPP-4) inhibitory activity and diphenyl-2-picryl-hydrazyl (DPPH) assay and results showed significant to good activity in compared to Linagliptin for antidiabetic activity and Ascorbic acid for antioxidant activity. Compound 7g (IC50=0.76nM) exhibited most promising DPP-4 inhibitory activity and also showed good antioxid and result. Docking study was also performed to provide an insight about the binding mode into binding sites of DPP-4 enzyme. Hopefully in future, compound 7g could be used as a lead compound for developing new antidiabetic agent with good antioxidant property.


Asunto(s)
Antioxidantes/química , Diabetes Mellitus Experimental/tratamiento farmacológico , Inhibidores de la Dipeptidil-Peptidasa IV/química , Diseño de Fármacos , Hipoglucemiantes/química , Quinazolinas/química , Animales , Antioxidantes/síntesis química , Antioxidantes/farmacología , Antioxidantes/uso terapéutico , Compuestos de Bifenilo/antagonistas & inhibidores , Diabetes Mellitus Experimental/enzimología , Dipeptidil Peptidasa 4/metabolismo , Inhibidores de la Dipeptidil-Peptidasa IV/síntesis química , Inhibidores de la Dipeptidil-Peptidasa IV/farmacología , Inhibidores de la Dipeptidil-Peptidasa IV/uso terapéutico , Radicales Libres/antagonistas & inhibidores , Hipoglucemiantes/síntesis química , Hipoglucemiantes/farmacología , Hipoglucemiantes/uso terapéutico , Simulación del Acoplamiento Molecular , Picratos/antagonistas & inhibidores , Quinazolinas/síntesis química , Quinazolinas/farmacología , Quinazolinas/uso terapéutico , Ratas Wistar , Tiazoles/síntesis química , Tiazoles/química , Tiazoles/farmacología , Tiazoles/uso terapéutico
7.
Eur J Med Chem ; 126: 853-869, 2017 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-27987485

RESUMEN

The synthesis of benzimidazole linked oxadiazole derivatives designed as potential EGFR and erbB2 receptor inhibitors with anticancer and apoptotic activity were studied. Compounds 7a specifically inhibit EGFR and erbB2 receptor at 0.081 and 0.098 µM concentration. Some of the compounds showed strong, broad-spectrum antiproliferative activitiy when tested against five human cancer cell lines. Compounds 7a and 7n were more cytotoxic than 5-fluorouracil against MCF-7 cancer cell, with IC50 values of 5.0 and 2.55 µM whereas, only 7a led to cell cycle arrest at G2/M phase accompanied by an increase in apoptosis. Compounds 7a and 7n showed normal architecture of myofibrils in cardiomyopathy study whereas only compound 7a showed nearly equal biochemical parameters (SGOT and SGPT) when compared to control. Molecular docking & 3D-QSAR studies were used to establish interactions of 7a and 7n within the active site of enzyme for ATP binding site of kinase domain.


Asunto(s)
Bencimidazoles/síntesis química , Bencimidazoles/farmacología , Diseño de Fármacos , Receptores ErbB/antagonistas & inhibidores , Simulación del Acoplamiento Molecular , Relación Estructura-Actividad Cuantitativa , Receptor ErbB-2/antagonistas & inhibidores , Animales , Antineoplásicos/síntesis química , Antineoplásicos/metabolismo , Antineoplásicos/farmacología , Antineoplásicos/toxicidad , Bencimidazoles/metabolismo , Bencimidazoles/toxicidad , Cardiomiopatías/inducido químicamente , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Técnicas de Química Sintética , Ensayos de Selección de Medicamentos Antitumorales , Receptores ErbB/química , Receptores ErbB/metabolismo , Femenino , Humanos , Hígado/efectos de los fármacos , Fosforilación/efectos de los fármacos , Dominios Proteicos , Inhibidores de Proteínas Quinasas/síntesis química , Inhibidores de Proteínas Quinasas/metabolismo , Inhibidores de Proteínas Quinasas/farmacología , Inhibidores de Proteínas Quinasas/toxicidad , Ratas , Receptor ErbB-2/metabolismo
8.
Asian Pac J Trop Biomed ; 2(12): 1002-8, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23593583

RESUMEN

India has a great wealth of various naturally occurring plant drugs which have great potential pharmacological activities. Datura stramonium (D. stramonium) is one of the widely well known folklore medicinal herbs. The troublesome weed, D. stramonium is a plant with both poisonous and medicinal properties and has been proven to have great pharmacological potential with a great utility and usage in folklore medicine. D. stromonium has been scientifically proven to contain alkaloids, tannins, carbohydrates and proteins. This plant has contributed various pharmacological actions in the scientific field of Indian systems of medicines like analgesic and antiasthmatic activities. The present paper presents an exclusive review work on the ethnomedical, phytochemical, pharmacological activities of this plant.


Asunto(s)
Datura stramonium/química , Medicina Tradicional , Fitoterapia , Extractos Vegetales/farmacología , Plantas Medicinales/química , Árboles/química , Antiasmáticos , Antibacterianos , Datura stramonium/toxicidad , Etnofarmacología , Humanos , India , Extractos Vegetales/química , Plantas Medicinales/toxicidad , Árboles/toxicidad
9.
Bioorg Med Chem Lett ; 16(17): 4571-4, 2006 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-16784842

RESUMEN

In present investigation, 2-(4-formyl-2-methoxyphenoxy) acetic acid on condensation with various ketones in methanolic KOH solution yielded the corresponding chalcones (1-3). These corresponding chalcones were reacted with appropriate acid hydrazide in glacial acetic acid led to the formation of phenoxy acetic acid derivatives. All newly synthesized compounds were evaluated for their anti-mycobacterial activities against Mycobacterium tuberculosis H(37)Rv.


Asunto(s)
Antibacterianos/síntesis química , Antibacterianos/farmacología , Fenoxiacetatos/química , Fenoxiacetatos/farmacología , Antibacterianos/química , Estructura Molecular , Mycobacterium tuberculosis/efectos de los fármacos , Fenoxiacetatos/síntesis química , Relación Estructura-Actividad
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