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1.
Int. microbiol ; 26(4): 1143-1155, Nov. 2023. ilus
Artigo em Inglês | IBECS | ID: ibc-227499

RESUMO

One of the biggest global causes of death is cancer. The side effects of currently available therapies have triggered the search for new drugs. The marine environment, with its vast biodiversity, including sponges, is a rich source of natural products with immense pharmaceutical potential. The aim of the study was to analyze the microbes associated with the marine sponge, Lamellodysidea herbacea, and explore them as resources for anticancer ability. This study includes the isolation of fungi from L. herbacea, and their evaluation for cytotoxic potential against human cancer cell lines such as A-549 (lung), HCT-116 (colorectal carcinoma), HT-1080 (Fibrosarcoma), and PC-3 (prostate) using MTT assay. This revealed that fifteen extracts showed significant anticancer ability (IC50 ≤ 20 µg/mL), at least against one of the cell lines. Three extracts, SPG12, SPG19, and SDHY 01/02, were found significant in terms of anticancer activity, at least against three to four cell lines (IC50 values ≤ 20 µg/mL). The fungus SDHY01/02 was identified by sequencing the internal transcribed spacer (ITS) region as Alternaria alternata. Its extract showed IC50 values < 10 µg/mL against all the tested cell lines and was further analysed through light and fluorescence microscopy. The extract of SDHY01/02 was active (lowest IC50 4.27 µg/mL) against A549 cells in a dose-dependent manner and caused apoptotic cell death. Further, the extract was fractionated and analyzed the constituents by GC-MS (Gas Chromatography-Mass Spectrometry). Di-ethyl ether fraction revealed the constituents (having anticancer activity) such pyrrolo[1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methyl propyl); 4,5,6,7-tetrahydro-benzo[C]rhiophene-1-carboxylic acid cyclopropylamide; 17-pentatriacontene; 9,12-octadecadienoic acid (Z, Z)-, methyl ester; while DCM fraction contained Oleic acid, eicosyl ester. This is the first report of A. alternata with anticancer potential that has been isolated from the sponge L. herbacea, as far as we are aware.This A. alternata can be exploited to get anticancer molecule(s) in the future.(AU)


Assuntos
Humanos , Masculino , Feminino , Alternaria , Ésteres , Linhagem Celular Tumoral , Extratos Vegetais/química , Poríferos , Microbiologia , Técnicas Microbiológicas , Neoplasias , Filogenia
2.
Ars pharm ; 57(4): 183-191, oct.-dic. 2016. tab, ilus, graf
Artigo em Inglês | IBECS | ID: ibc-159647

RESUMO

Aims: Synthesize tri-acyl ester derivatives of uridine, and evaluate its cytotoxicity against breast cancer cells line. Methods: The tri-esterified uridine derivatives were obtained through Steglich esterification reaction by fatty and aromatic acids, and with acetic anhydride. An acetonide derivative from uridine was prepared with acid catalysis. Compounds were characterized by NMR spectroscopy (1H NMR and 13C NMR), and mass spectrometry. Derivatives were assessed in chinese hamster ovary (CHO-K1) and human breast cancer (MCF-7) cell lines. Results: Five tri-acyl ester derivatives of uridine were obtained one acetic acid, three fatty acids (myristic acid, stearic acid and oleic acid) with an aromatic acid. The uridine per-acetylated and uridine acetonide were obtained in high yields, however, the tri-acyl ester derivatives of uridine with fatty and aromatic acids were obtained in moderate and low yields, respectively. The acetonide and compounds 2 and 3 exhibited a cell viability inhibition significant on both cell lines to the higher concentration. Conclusions: Esterification method with coupling agents allowed obtained tri-acyl ester uridine derivatives with aliphatic and aromatic acids. However, significant cytotoxic activity (p<0.05) for uridine and its derivatives was not observed


Objetivos: Sintetizar derivados triesterificados de la uridina y evaluar su citotóxicidad sobre una línea celular de cáncer de mama. Métodos: Se prepararon derivados triesterificados de la uridina mediante la esterificación de Steglich para los ácidos grasos y aromáticos, y con anhídrido acético. Además se preparó el derivado acetonido mediante catálisis ácida. Los compuestos se caracterizaron por espectroscopia de RMN (RMN 1H y RMN 13C), y espectrometría de masas. Los derivados se evaluaron sobre líneas celulares de tumor de ovario de hámster chino (CHO) y de cáncer de mamá (MCF-7). Resultados: Se obtuvieron cinco derivados triesterificados de la uridina, uno con ácido acético, tres con ácidos grasos (ácido mirístico, ácido esteárico y ácido oleico) y uno con ácido aromático. Los derivados de uridina per-acetilada y acetonido se obtuvieron con rendimientos altos, sin embargo los derivados con ácidos grasos y aromático, se obtuvieron con rendimientos moderados y bajo, respectivamente. El acetonido y los compuestos 2 y 3, exhibieron inhibición significativa de la viabilidad celular sobre ambas líneas a la concentración más alta evaluada. Conclusiones: El método de esterificación con agentes de acoplamiento utilizado, permitió obtener derivados triesterificados de la uridina con ácidos grasos y aromáticos. No se observó actividad citotóxica significativa (p<0,05) para la uridina y sus derivados


Assuntos
Animais , Feminino , Uridina/síntese química , Uridina/toxicidade , Uridina/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Ácidos Graxos/uso terapêutico , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/veterinária , Nucleosídeos/síntese química , Nucleosídeos/uso terapêutico , Ésteres/síntese química , Células CHO
3.
Rev. esp. salud pública ; 89(1): 99-105, ene.-feb. 2015. graf
Artigo em Espanhol | IBECS | ID: ibc-133811

RESUMO

Fundamentos: El consumo de pez mantequilla se está extendiendo en nuestro país. Si no se cumplen unas adecuadas normas de conservación y preparación de este tipo de alimento puede producir intoxicaciones. El objetivo del trabajo fue describir un brote de doble intoxicación por histamina y ésteres cerosos tras el consumo de pez mantequilla. Métodos: Estudio descriptivo de la doble intoxicación producida en un banquete celebrado en julio de 2013 en Valladolid. Se estudió mediante la cumplimentación de una encuesta específica telefónica o desde los centros asistenciales que atendieron a los comensales. La base de datos y posterior análisis estadístico descriptivo se realizaron con el programa Microsoft Excel Professional Plus 2010. Resultados. De los 27 casos declarados, en 24 se obtuvo información sobre los síntomas. La tasa de ataque fue 22,5%, con un cuadro clínico en el que predominó la diarrea (75%), la cefalea (46%), el dolor abdominal (38%) y la sudoración (38%), destacando por su especificidad el picor/ardor de boca (29%). Cuatro pacientes presentaron heces anaranjadas y oleosas (keriorrhea). El tiempo medio transcurrido, desde el inicio de la cena hasta la aparición de los síntomas, fue de dos horas. La duración media de la sintomatología fue de 14 horas. La analítica del pescado servido mostró niveles de histamina superiores a 2.000 mg/kg. Conclusiones. Se produjo una doble intoxicación (histamina y ésteres cerosos) por consumo de pez mantequilla. El cuadro fue leve y autolimitado (AU)


Background. The consumption of butterfish is spreading in our country; if appropriate standards of conservation and preparation of this type of food are not met may cause poisoning. The objective is to describe an outbreak of histamine poisoning and double cerous esters after consumption butterfish. Methods. A descriptive study of the double intoxication at a banquet held in July 2013 in Valladolid. It was studied by filling a specific survey, by phone or by the medical centers who treated the guests. The database and subsequent descriptive statistical analyzes were performed with Microsoft Excel Professional Plus 2010 program. Results. Of the 27 cases reported in 24 we obtained information on symptoms. The attack rate was 22.5 %, with a clinical picture in which predominant diarrhea (75%), headache (46%), abdominal pain (38%) and sweating (38%), highlighting its specificity itching/burning of mouth (29%). Four patients had orange and oily stools (keriorrhea). The average time from the start of dinner to onset of symptoms was 119 minutes. The mean duration of symptoms was 14 hours. Analytical served fish showed histamine levels above 2,000 mg / kg. Conclusions. A double poisoning (histamine and cerous esters) was produced by consumption of butterfish. The picture was mild and self-limiting. You need to know this type of poison to properly handle avoiding unnecessary tests, and to notify the health authority for investigation and subsequent adoption of appropriate measures (AU)


Assuntos
Humanos , Doenças Transmitidas por Alimentos/epidemiologia , Doenças dos Peixes/transmissão , Histamina/efeitos adversos , Ésteres/efeitos adversos , Contaminação de Alimentos/análise , Produtos Pesqueiros/efeitos adversos , Surtos de Doenças/estatística & dados numéricos
4.
Ars pharm ; 47(1): 61-79, 2006. ilus, tab
Artigo em Es | IBECS | ID: ibc-045550

RESUMO

Se sintetizaron y evaluaron cinco ésteres aminoetílicos N,N-disustituidos derivados del ketorolaco y la aspirina paraeliminar su toxicidad gástrica. Se diseñaron especialmente ésteres intactos para satisfacer el requisito estructural dedisponer de una actividad anticolinérgica antes de la separación. Además de bloquear el grupo carboxilato ácidomediante esterifi cación, esta actividad se incorporó a los ésteres sintetizados, con el benefi cio adicional esperadode la reducción de la secreción de ácido gástrico y la consecuente eliminación de la irritación local mediante unmecanismo dual. En este estudio se describen la síntesis, la cinética de la hidrólisis y la actividad biológica de estosésteres. Todos los ésteres derivados permanecieron estables en tampones(pH 2,0 y 7,4) durante un período de tiemposufi ciente, lo que aseguró su absorción en estado intacto y la eliminación de la irritación gástrica local producidapor el fármaco principal. Se observó una rápida hidrólisis enzimática de todos los derivados en un 80% de suerohumano combinado. Se descubrió que los ésteres sintetizados poseían la actividad anticolinérgica propuesta. Elpotencial ulcerogénico de los derivados evaluados se redujo de forma signifi cativa. Sin embargo, la actividad antiinflamatoria en el caso de los derivados de la aspirina fue mucho menor


To overcome the gastric toxicity of aspirin and ketorolac fi ve different N,N-disubstitutedaminoethyl ester derivatives for each were synthesized and evaluated. The intact esters were specially designed to satisfy the structural requirement for possessing the anticholinergic activity before cleavage. Besides blocking the acidic carboxyl group by esterifi cation this activity was incorporated into the synthesized esters with an expected additional benefi t of having reduced gastric acid secretion and thereby abolishing the local irritation by a dual mechanism. This report describes the synthesis, hydrolysis kinetics and the biological activity of these esters. All the ester derivatives were found to be stable in buffers (pH 2.0 and 7.4) for suffi cient time period, assuring them to be absorbed intact and to successfully overcome the local gastric irritation of the parent drug. A fast enzymatic hydrolysis was observed for all the derivatives in 80% pooled human serum. The synthesized esters were found to possess the proposed anticholinergic activity. The ulcerogenic potential of the evaluated derivatives was signifi cantly reduced. However, the anti-infl ammatory activity in case of aspirin derivatives was much lower


Assuntos
Ratos , Animais , Humanos , Cetorolaco/farmacologia , Cetorolaco/farmacocinética , Aspirina/farmacologia , Aspirina/farmacocinética , Anti-Inflamatórios não Esteroides/farmacologia , Anti-Inflamatórios não Esteroides/farmacocinética , Estômago , Ésteres/síntese química , Ésteres/farmacologia , Ésteres/farmacocinética , Úlcera Gástrica/induzido quimicamente , Hidrólise , Ratos Sprague-Dawley
5.
Ars pharm ; 46(3): 263-277, 2005. ilus, tab
Artigo em Es | IBECS | ID: ibc-042477

RESUMO

Con objeto de obtener compuestos con menor toxicidad gástrica que el diclofenaco, se sintetizaron y evaluaron cinco ésteres derivados aminoetílicos N,N-sustituidos derivados del diclofenaco. Estos ésteres se diseñaron para satisfacer el requisito estructural de disponer de una actividad anticolinérgica intacta antes de la separación. Además de bloquear el grupo carboxilo ácido mediante esterificación, esta actividad se incorporó a los ésteres sintetizados, con el beneficio adicional esperado de la reducción de la secreción de ácido gástrico y la consecuente eliminación de la irritación local mediante un mecanismo dual. En este estudio se describen la síntesis, la cinética de la hidrólisis y la actividad biológica de estos ésteres. Todos los derivados de éster permanecieron estables en tampones de pH 2,0 y 7,4 durante un período de tiempo suficiente, lo que aseguró su absorción en estado intacto y la eliminación de la irritación gástrica local producida por el fármaco principal. Se observó una rápida hidrólisis enzimática de todos los derivados en un 80% de suero humano combinado. Se descubrió que los ésteres sintetizados poseían la actividad anticolinérgica propuesta. Se mantuvo la actividad antiinflamatoria en la mayoría de los compuestos y se logró una significativa reducción del potencial ulcerogénico en comparación con el diclofenaco


In an effort for obtaining compounds with lower gastric toxicity than diclofenac, five different N,Ndisubstitutedaminoethyl ester derivatives of diclofenac were synthesized and evaluated. These esters were designed so as to satisfy the structural requirement for them to possess the anticholinergic activity in intact form before cleavage. Besides blocking the acidic carboxyl group by esterification this activity was incorporated into the synthesized esters with an expected additional benefit of having reduced gastric acid secretion and thereby abolishing the local irritation by a dual mechanism. This report describes the synthesis, hydrolysis kinetics and the biological activity of these esters. All the ester derivatives were found to be stable in buffers (pH 2.0 and 7.4) for sufficient time period, assuring them to be absorbed intact and to successfully overcome the local gastric irritation of the parent drug. A fast enzymatic hydrolysis was observed for all the derivatives in 80% pooled human serum. The synthesized esters were found to possess the proposed anticholinergic activity. The anti-inflammatory activity for most of the compounds was retained with a significant reduction in the ulcerogenic potential compared to diclofenac


Assuntos
Diclofenaco/administração & dosagem , Diclofenaco/farmacologia , Diclofenaco/farmacocinética , Mucosa Gástrica/lesões , Mucosa Gástrica/fisiopatologia , Mucosa Intestinal/lesões , Hidrólise , Anti-Inflamatórios/administração & dosagem , Anti-Inflamatórios/efeitos adversos , Diclofenaco/uso terapêutico , Espectrofotometria/métodos , Espectrofotometria , Ésteres/administração & dosagem , Ésteres/imunologia , Ésteres/farmacologia , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/farmacocinética
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