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1.
Mol Phylogenet Evol ; 134: 300-310, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30685417

RESUMO

Cyanobacteria are natural enormous sources of various biologically active compounds with great contributions in different industries. This study aimed to explore and characterize novel cyanobacterial isolates with antioxidant activity and potent phycoremediation ability from Egyptian wastewater canals. The in vitro biological activity of these isolates and their potential ability to take up nutrients and heavy metals from wastewater were examined. The obtained isolates were sequenced and deposited in database under accession numbers, KY250420.1, KY321359.1, KY296359.1 and KU373076.1 for Nostoc calcicola, Leptolyngbya sp., Nostoc sp., and Nostoc sp., respectively. Leptolyngbya sp. (KY321359.1) showed the lowest identity (90%) with the nearest deposited sequence in database. While the isolate Nostoc sp. (KU373076.1) showed the highest total phenolic content as well as the highest levels of caffeic, ferulic and gallic acids. Consequently, it presented the highest antioxidant scavenging activity. All studied isolates revealed potent ability in chelating nutrients and removing heavy metals from wastewater. In conclusion, this study provides a taxonomic, biochemical and molecular evidence of four novel cyanobacterial isolates with antioxidant activity and potential phycoremediation ability.


Assuntos
Antioxidantes/farmacologia , Cianobactérias/isolamento & purificação , Poluição da Água , Biodegradação Ambiental , Compostos de Bifenilo/química , Cianobactérias/classificação , Fenóis/farmacologia , Filogenia , Picratos/química , Polimorfismo de Nucleotídeo Único/genética , RNA Ribossômico 16S/genética , Mapeamento por Restrição , Águas Residuárias , Poluentes Químicos da Água/isolamento & purificação , Purificação da Água
2.
Phytomedicine ; 43: 126-134, 2018 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-29747745

RESUMO

BACKGROUND: Modified herbal medicines implicate the combination of several therapeutic practices of native systems of medicine that may extend many earlier generations, which frequently afford valuable therapeutic benefits. PURPOSE: In this study, the role of nano-curcumin and aged garlic extract (AGE) as two modified phytomedicines on alleviating both of advanced glycation end products (AGEPs) and oxidative stress (OS) in streptozotocin (STZ) induced diabetic rats were investigated during this study. METHOD: Nano-curcumin and AGE suspension were orally administrated at a dose of 300, 500 mg/kg body weight respectively. Serum glucose, insulin, total cholesterol, triglycerides and myocardial enzyme activities including creatine kinase-isoenzyme (CK-MB), lactate dehydrogenase (LDH) and aspartate aminotransferase (AST) were determined biochemically, while quantitative real-time polymerase chain reaction (qRT-PCR)-test had been used to determine relative of manganese-superoxide dismutase (Mn-SOD) and receptor for advanced glycation end products (RAGE) gene expressions in the heart tissue of rats. Structure of rat's heart tissue was examined by histopathological analysis (H&E). RESULTS: AGE increased the body weight and insulin concentration, while, it decreased serum glucose concentration, CK-MB, and LDH enzyme activities in comparing with the diabetic group. In addition, total cholesterol, triglycerides, and AST didn't show any significant changes in serum values of AGE compared to diabetic rats. Nano-curcumin suspension decreased the serum levels of triglycerides, CK- MB, LDH, and AST. While, there were non-significant changes in the body weight, glucose, insulin, and total cholesterol level of the same group compared with the STZ- untreated induced diabetic rats. The transcript quantity of manganese-superoxide dismutase gene (Mn-SOD) was highly accumulated (3.25 and 3.87-fold) in the heart tissue sample of the induced diabetic rats in response to both nano-Curcumin and AGE suspension respectively. While AGE was the most potent treatment where it caused down regulation of the receptor for advanced glycation end products gene (RAGE) expression (1.79-fold). Results of histopathological analyses under the light microscope showed restoring the structural integrity of the myocytes towards normalization in diabetic hearts treated with each of nano-curcumin and AGE suspension compared with the untreated diabetic heart samples. CONCLUSION: Nano-curcumin and AGE suspension have a great therapeutic potential in the treatment of DCM, Diabetic cardiomyopathy, by attenuating cardiac inflammation, myocardial fibrosis, and programmed myocardial cell deaths through inhibiting OS and AGEPs accumulation in diabetic heart tissue. Furthermore, the hypoglycemic antioxidant properties of AGE resulted in more potent therapeutic effect than nano-curcumin in the treatment of diabetic hearts.


Assuntos
Curcumina/farmacologia , Cardiomiopatias Diabéticas/tratamento farmacológico , Alho/química , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Animais , Antioxidantes/farmacologia , Apoptose/efeitos dos fármacos , Curcumina/administração & dosagem , Diabetes Mellitus Experimental/complicações , Fibrose/tratamento farmacológico , Hipoglicemiantes/farmacologia , Insulina/metabolismo , Masculino , Miocárdio/metabolismo , Miocárdio/patologia , Nanopartículas/administração & dosagem , Nanopartículas/química , Ratos Sprague-Dawley , Receptor para Produtos Finais de Glicação Avançada/genética , Superóxido Dismutase/genética
3.
Plant Physiol Biochem ; 108: 191-202, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27448793

RESUMO

Silymarin, a Silybum marianum seed extract containing a mixture of flavonolignans including silybin, is being used as an antihepatotoxic therapy for liver diseases. In this study, the enhancing effect of gamma irradiation on plant growth parameters of S. marianum under salt stress was investigated. The effect of gamma irradiation, either as a single elicitor or coupled with salinity, on chalcone synthase (CHS) gene expression and silybin A + B yield was also evaluated. The silybin A + B content in S. marianum fruits was estimated by liquid chromatography-mass spectrometry (LC-MS/MS). An increase in silybin content was accompanied by up-regulation of the CHS1, CHS2 and CHS3 genes, which are involved in the silybin biosynthetic pathway. The highest silybin A + B production (0.77 g/100 g plant DW) and transcript levels of the three studied genes (100.2-, 91.9-, and 24.3-fold increase, respectively) were obtained with 100GY gamma irradiation and 4000 ppm salty water. The CHS2 and CHS3 genes were partially sequenced and submitted to the NCBI database under the accession numbers KT252908.1 and KT252909.1, respectively. Developing new approaches to stimulate silybin biosynthetic pathways could be a useful tool to potentiate the use of plants as renewable resources of medicinal compounds.


Assuntos
Aciltransferases/genética , Cardo Mariano/genética , Silimarina/metabolismo , Aciltransferases/metabolismo , Frutas/genética , Frutas/metabolismo , Raios gama , Regulação da Expressão Gênica de Plantas , Germinação , Cardo Mariano/metabolismo , Cardo Mariano/efeitos da radiação , Família Multigênica , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Plantas Medicinais/genética , Plantas Medicinais/metabolismo , Salinidade , Tolerância ao Sal , Sementes/crescimento & desenvolvimento , Silibina , Silimarina/genética
4.
Gene ; 576(1 Pt 2): 358-65, 2016 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-26526133

RESUMO

Phaseolus vulgaris is subjected to serious post-harvest diseases such as grey mold and cottony rot diseases caused by Botrytis cinerea and Pythium aphanidermatum, respectively. In current study, potassium silicate (KSi), potassium thiosulfate (KTS) and potassium sulfate (KS) suppressed moderately the growth of B. cinerea and P. aphanidermatum in vitro. The applied treatments significantly suppressed grey mold and cottony rot of Xera and Valentino snap beans varieties' pods stored at 7 ± 1°C and 90-95% RH for 20 days. Ethylene responsive factor (ERF), polygalacturonase inhibitor protein (PGIP), phosphatase associated to defense (PA) and pathogenesis-related protein (PR1) defense genes were over-expressed in leaves tissue of both bean varieties responding positively to potassium salts field application. The expression of these genes was influenced by plant genotype and environment as it varied by snap bean varieties. Accumulation of ERF, GIP, PA and PR1 genes transcript under KTS at 4000 ppm treatment were the highest in Xera tissues (3.5-, 4.8-, 4- and 4.8-fold, respectively). In conclusion, pre-harvest potassium salt in vivo application could be used as effective safe alternatives to fungicides against grey mold and cottony rot diseases of snap beans during storage for up to 20 days at 7 ± 1°C.


Assuntos
Botrytis/efeitos dos fármacos , Phaseolus/genética , Pythium/efeitos dos fármacos , Sulfatos/farmacologia , Tiossulfatos/farmacologia , Agricultura/métodos , Botrytis/patogenicidade , Resistência à Doença/genética , Fungicidas Industriais/farmacologia , Regulação da Expressão Gênica de Plantas , Phaseolus/efeitos dos fármacos , Phaseolus/metabolismo , Doenças das Plantas/genética , Doenças das Plantas/microbiologia , Doenças das Plantas/prevenção & controle , Folhas de Planta/efeitos dos fármacos , Folhas de Planta/genética , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Potássio/farmacologia , Pythium/patogenicidade , Silicatos/farmacologia
5.
Appl Microbiol Biotechnol ; 98(23): 9805-16, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25324129

RESUMO

Detection of pork meat adulteration in "halal" meat products is a crucial issue in the fields of modern food inspection according to implementation of very strict procedures for halal food labelling. Present study aims at detecting and quantifying pork adulteration in both raw and cooked manufactured sausages. This is by applying an optimized species-specific PCR procedure followed by QIAxcel capillary electrophoresis system. Manufacturing experiment was designed by incorporating pork with beef meat at 0.01 to 10 % substitution levels beside beef and pork sausages as negative and positive controls, respectively. Subsequently, sausages were divided into raw and cooked sausages then subjected to DNA extraction. Results indicated that PCR amplifications of mitochondrial D-loop and cytochrome b (cytb) genes by porcine-specific primers produced 185 and 117 bp pork-specific DNA fragments in sausages, respectively. No DNA fragments were detected when PCR was applied on beef sausage DNA confirming primers specificity. For internal control, a 141-bp DNA fragment of eukaryotic 18S ribosomal RNA (rRNA) gene was amplified from pork and beef DNA templates. Although PCR followed by either QIAxcel or agarose techniques were efficient for targeted DNA fragments differentiation even as low as 0.01 % (pork/meat: w/w). For proficiency, adequacy, and performance, PCR-QIA procedure is highly sensitive, a time-saver, electronically documented, mutagenic-reagent free, of little manual errors, accurate in measuring PCR fragments length, and quantitative data supplier. In conclusion, it can be suggested that optimized PCR-QAI is considered as a rapid and sensitive method for routine pork detection and quantification in raw or processed meat.


Assuntos
Citocromos b/genética , DNA Mitocondrial/genética , Contaminação de Alimentos/análise , Inocuidade dos Alimentos/métodos , Carne , Reação em Cadeia da Polimerase/métodos , DNA Ribossômico/química , DNA Ribossômico/genética , Dados de Sequência Molecular , RNA Ribossômico 18S/genética , Sensibilidade e Especificidade , Análise de Sequência de DNA , Fatores de Tempo
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