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1.
J Appl Toxicol ; 43(8): 1159-1168, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-36823762

RESUMEN

Besides the use of resveratrol as a drug candidate, there are obstacles mainly due to its poor pharmacokinetic properties. Numerous studies are being conducted on the synthesis of resveratrol derivatives that exhibit enhanced biological activity. The aim of our research was to investigate activity of the newly synthesized ferrocene-containing triacyl derivative of resveratrol to achieve cell protection from endo/exogenous ROS and reduction in cell death by assessing multiple endpoints. Our research showed that both resveratrol and the resveratrol derivatives (1-100 µM) lower the levels of ROS in CHO-K1 cells. Resveratrol at doses <20 µM had little or no effect on cell proliferation, while at higher doses, a significant inhibitory effect on cell proliferation and viability has been noticed. The activity of the new derivative was significantly altered compared to resveratrol-cellular viability was not suppressed regardless of the concentration applied, and the extent of apoptosis was low. In summary, the new ferrocene-resveratrol derivative has the potential to protect cells from oxidative stress due to its low cytotoxicity and retained antioxidant properties, whereas caution should be exercised with resveratrol at higher doses, as it significantly impairs cell viability and induces cell death. By linking ROS to specific diseases (relevance in neurodegenerative, cardiovascular, and neoplastic diseases), we can assume that the new resveratrol derivative can prevent or alleviate the mentioned disorders. Furthermore, recognition of the resveratrol derivative as an anti-apoptotic chemical could be useful in the cultivation of various cell lines on a large scale in the industrial biotechnology.


Asunto(s)
Antioxidantes , Estilbenos , Resveratrol/farmacología , Especies Reactivas de Oxígeno/metabolismo , Metalocenos/farmacología , Antioxidantes/metabolismo , Apoptosis , Estilbenos/farmacología
2.
Molecules ; 27(14)2022 Jul 13.
Artículo en Inglés | MEDLINE | ID: mdl-35889358

RESUMEN

The aim of this work was to develop a simple and easy-to-apply model to predict the pH values of deep eutectic solvents (DESs) over a wide range of pH values that can be used in daily work. For this purpose, the pH values of 38 different DESs were measured (ranging from 0.36 to 9.31) and mathematically interpreted. To develop mathematical models, DESs were first numerically described using σ profiles generated with the COSMOtherm software. After the DESs' description, the following models were used: (i) multiple linear regression (MLR), (ii) piecewise linear regression (PLR), and (iii) artificial neural networks (ANNs) to link the experimental values with the descriptors. Both PLR and ANN were found to be applicable to predict the pH values of DESs with a very high goodness of fit (R2independent validation > 0.8600). Due to the good mathematical correlation of the experimental and predicted values, the σ profile generated with COSMOtherm could be used as a DES molecular descriptor for the prediction of their pH values.


Asunto(s)
Disolventes Eutécticos Profundos , Redes Neurales de la Computación , Concentración de Iones de Hidrógeno , Modelos Teóricos , Solventes/química
3.
Int J Mol Sci ; 22(24)2021 Dec 16.
Artículo en Inglés | MEDLINE | ID: mdl-34948332

RESUMEN

The concept of peptidomimetics is based on structural modifications of natural peptides that aim not only to mimic their 3D shape and biological function, but also to reduce their limitations. The peptidomimetic approach is used in medicinal chemistry to develop drug-like compounds that are more active and selective than natural peptides and have fewer side effects. One of the synthetic strategies for obtaining peptidomimetics involves mimicking peptide α-helices, ß-sheets or turns. Turns are usually located on the protein surface where they interact with various receptors and are therefore involved in numerous biological events. Among the various synthetic tools for turn mimetic design reported so far, our group uses an approach based on the insertion of different ferrocene templates into the peptide backbone that both induce turn formation and reduce conformational flexibility. Here, we conjugated methyl 1'-aminoferrocene-carboxylate with homo- and heterochiral Pro-Ala dipeptides to investigate the turn formation potential and antiproliferative properties of the resulting peptidomimetics 2-5. Detailed spectroscopic (IR, NMR, CD), X-ray and DFT studies showed that the heterochiral conjugates 2 and 3 were more suitable for the formation of ß-turns. Cell viability study, clonogenic assay and cell death analysis showed the highest biological potential of homochiral peptide 4.


Asunto(s)
Ácidos Carboxílicos/química , Ácidos Carboxílicos/farmacología , Proliferación Celular/efectos de los fármacos , Compuestos Ferrosos/química , Compuestos Ferrosos/farmacología , Peptidomiméticos/química , Peptidomiméticos/farmacología , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Cristalografía por Rayos X/métodos , Dipéptidos/química , Dipéptidos/farmacología , Células HeLa , Humanos , Células MCF-7 , Péptidos/química , Péptidos/farmacología , Estructura Secundaria de Proteína , Estereoisomerismo
4.
Molecules ; 26(16)2021 Aug 04.
Artículo en Inglés | MEDLINE | ID: mdl-34443311

RESUMEN

The aim of this work is to develop an industrially suitable process for the sustainable waste disposal in wine production. The proposed process involves the development of an environmentally friendly method for the isolation of biologically active compounds from Grasevina grape pomace according to the green extraction principles, in order to obtain a ready-to-use extract. In this process, deep eutectic solvents (DES) were used as extraction solvents. Aiming to save time in selecting the optimal DES that would provide the most efficient Grasevina pomace polyphenols extraction, the user-friendly software COSMOtherm was used and 45 DES were screened. Moreover, the prepared extracts were chemically and biologically characterized to confirm their safety for human application. Computational and experimental results proved the applicability of COSMOtherm in the selection of the optimal DES for the environmentally friendly preparation of the ready-to-use extract from Grasevina grape pomace with expected application in the cosmetic industry.


Asunto(s)
Programas Informáticos , Solventes/química , Vitis/química , Residuos/análisis , Catequina/análisis , Supervivencia Celular/efectos de los fármacos , Células HaCaT/efectos de los fármacos , Humanos , Extractos Vegetales/farmacología , Polifenoles/aislamiento & purificación , Agua/análisis
5.
Plant Foods Hum Nutr ; 75(4): 518-524, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32766942

RESUMEN

Flaxseed meal, a byproduct of flaxseed oil extraction, was treated as low-value agrowaste for a long time despite its high protein content. Flaxseed meal has recently garnered increasing interest as a source of proteins and other bioactive compounds with positive impacts on human health. The aim of this study was to investigate the in vitro biological potential of flaxseed protein hydrolysates (FPH). Three FPHs were prepared using three hydrolytic enzymes: Alcalase, Neutrase and Protamex. The molecular weight profile of peptides contained in the hydrolysates was determined by size exclusion chromatography (SEC). The oxygen radical absorbance capacity (ORAC) assay was used to determine the peptide antioxidant capacity, while proliferative effects were studied in two cell lines: HeLa and HaCaT. The latter was also used to determine the protective effect of the FPH during induced oxidative stress. Alcalase showed the highest proteolytic activity, while the produced flaxseed protein hydrolysate (FPH-A) exhibited the strongest antioxidant potential. FPH-A had cytotoxic effects at 10 mg/mL in HeLa cells, but it stimulated HaCaT cell growth. Moreover, a mild protective effect of FPH-A was detected in HaCaT cells after induction of oxidative stress. Flaxseed protein hydrolysates obtained by Neutrase (FPH-N) and Protamex (FPH-P) have less pronounced or no potential at all, with respect to their antioxidative or antiproliferative activity. Therefore, to increase value-added utilization of flaxseed meal we suggest further research on hydrolysate obtained by Alcalase.


Asunto(s)
Lino , Hidrolisados de Proteína , Antioxidantes/farmacología , Endopeptidasas , Células HeLa , Humanos , Péptido Hidrolasas , Hidrolisados de Proteína/farmacología
6.
Mol Biol Rep ; 46(6): 6079-6085, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31493283

RESUMEN

Food proteins from different sources can provide beneficial effects on human health by releasing the bioactive peptides that are integral part of their native structure. In this study, we tested the biological potential of hempseed protein hydrolysates (HPHs) obtained from hempseed cake protein isolate. The HPHs were prepared by enzyme hydrolysis using three different proteases of microbial origin: Alcalase®, Neutrase® and Protamex®. The antioxidant activity of the obtained hydrolysates was determined by oxygen radical absorbance capacity (ORAC) assay, while the proliferative effects on normal (HaCaT) and cancer (HeLa) cells were determined by the CellTiter 96® AQueous One Solution Reagent (MTS) assay. HPHs showed dose-dependent antiproliferative effects on HeLa cells and stimulatory effects on the proliferation of HaCaT cells. HPH obtained by Neutrase® (HPH-N) showed the highest antioxidant activity expressed as an ORAC value. The protective effect of HPH-N on H2O2-induced oxidative stress in normal and cancer cells was evaluated and 1 mg/mL of HPH-N significantly reduced the formation of intracellular reactive oxygen species (ROS) in both cell lines. The obtained results indicate the benefits of HPHs as potential natural antioxidants for the food industry and contribute to the growing trend of utilizing hempseed by-products.


Asunto(s)
Estrés Oxidativo/efectos de los fármacos , Extractos Vegetales/farmacología , Hidrolisados de Proteína/farmacología , Antioxidantes/metabolismo , Cannabis/metabolismo , Línea Celular , Proliferación Celular/efectos de los fármacos , Endopeptidasas/metabolismo , Células HeLa , Humanos , Peróxido de Hidrógeno/farmacología , Hidrólisis , Péptido Hidrolasas , Péptidos/metabolismo , Extractos Vegetales/metabolismo , Hidrolisados de Proteína/metabolismo , Especies Reactivas de Oxígeno/metabolismo
7.
Ecotoxicol Environ Saf ; 131: 30-6, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27179607

RESUMEN

With the advent of ionic liquids, much was expected concerning their applicability as an alternative to organic solvents in the chemical technology and biotechnology fields. However, the most studied and commonly used ionic liquids based on imidazolium and pyridinium were found not to be as environmentally friendly as it was first expected. Therefore, a new generation of alternative solvents named natural ionic liquids and deep eutectic solvents, composed of natural and/or renewable compounds, have come into focus in recent years. Since the number of newly synthesized chemicals increases yearly, simple and reliable methods for their ecotoxicological assessment are necessary. Permanent fish cell lines can serve as a test system for the evaluation of a chemical's cytotoxicity. This paper presents research results on the cytotoxic effects on Channel Catfish Ovary (CCO) cell line induced by fifteen cholinium-based ionic liquids and deep eutectic solvents. Based on the decrease in cell viability, the most obvious toxic effect on CCO cells was caused by ionic liquid choline oxalate, while other solvents tested exhibited low cytotoxicity. Therefore, we can conclude that cholinium-based ionic liquids and deep eutectic solvents are comparatively less toxic to CCO cells than conventional ionic liquids.


Asunto(s)
Supervivencia Celular/efectos de los fármacos , Colina/toxicidad , Ictaluridae , Líquidos Iónicos/toxicidad , Animales , Línea Celular , Ecotoxicología , Femenino , Líquidos Iónicos/química , Ovario/citología
8.
Food Technol Biotechnol ; 54(2): 145-155, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27904404

RESUMEN

Fruit wines contain a wide range of phenolic compounds with biological effects, but their composition and potential benefits to human health have been studied to the much lesser extent compared to grape wines. The aim of this research is to study the phenolic profile of different types of fruit wines and to evaluate their antioxidant and biological potential. Commercially available fruit wines from blackberry, cherry, raspberry, blackcurrant, strawberry and apple produced in Croatia were analyzed. To the best of our knowledge, this study represents the first comprehensive screening of Croatian fruit wines. The phenolic characterization was performed by spectrophotometry and HPLC-PDA/MS analysis. The antioxidant capacity was determined using ABTS and FRAP assays, while in vitro biological activity was analyzed by the cytotoxicity assay on human breast (MCF-7), colon (CaCo-2) and cervical (HeLa) cancer cell lines. Among the studied fruit wines, blackberry, cherry and blackcurrant wines contained the highest amount of total phenolics, while the last two also contained the highest amount of total anthocyanins. The analysis of individual phenolic compounds showed distinctive phenolic composition of each type of fruit wine, notably as regards anthocyanins. Blackberry, followed by cherry, raspberry and blackcurrant wines also had a significantly higher antioxidant capacity than strawberry and apple wines. Fruit wines inhibited the growth of human cancer cells in vitro in a dose--dependent manner with differing susceptibility among tested cancer cells. Blackberry, cherry, raspberry and blackcurrant wines in the volume ratio of 10 and 20% showed to be the most effective anti-proliferative agents, with higher susceptibility in HeLa and MCF-7 cells than CaCo-2 cells.

9.
Ecotoxicol Environ Saf ; 112: 22-8, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25463849

RESUMEN

Within this work we evaluated the cytotoxicity towards the Channel Catfish Ovary (CCO) cell line of some imidazolium-based ionic liquids containing different functionalized and unsaturated side chains. The toxic effects were measured by the reduction of the WST-1 dye after 72 h exposure resulting in dose- and structure-dependent toxicities. The obtained data on cytotoxic effects of 14 different imidazolium ionic liquids in CCO cells, expressed as EC50 values, were used in a preliminary quantitative structure-toxicity relationship (QSTR) study employing regression- and classification-based approaches. The toxicity of ILs towards CCO was chiefly related to the shape and hydrophobicity parameters of cations. A significant influence of the quantum topological molecular similarity descriptor ellipticity (ε) of the imine bond was also observed.


Asunto(s)
Imidazoles/toxicidad , Líquidos Iónicos/toxicidad , Ovario/efectos de los fármacos , Contaminantes Químicos del Agua/toxicidad , Animales , Cationes/química , Línea Celular , Femenino , Interacciones Hidrofóbicas e Hidrofílicas , Ictaluridae , Modelos Teóricos , Relación Estructura-Actividad Cuantitativa
10.
Ecotoxicol Environ Saf ; 112: 46-53, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25463852

RESUMEN

Deep eutectic solvents (DESs) have been dramatically expanding in popularity as a new generation of environmentally friendly solvents with possible applications in various industrial fields, but their ecological footprint has not yet been thoroughly investigated. In the present study, three choline chloride-based DESs with glucose, glycerol and oxalic acid as hydrogen bond donors were evaluated for in vitro toxicity using fish and human cell line, phytotoxicity using wheat and biodegradability using wastewater microorganisms through closed bottle test. Obtained in vitro toxicity data on cell lines indicate that choline chloride: glucose and choline chloride:glycerol possess low cytotoxicity (EC50>10 mM for both cell lines) while choline chloride:oxalic acid possess moderate cytotoxicity (EC50 value 1.64 mM and 4.19 mM for fish and human cell line, respectively). Results on phytotoxicity imply that tested DESs are non-toxic with seed germination EC50 values higher than 5000 mg L(-1). All tested DESs were classified as'readily biodegradable' based on their high levels of mineralization (68-96%). These findings indicate that DESs have a green profile and a good prospect for a wider use in the field of green technologies.


Asunto(s)
Colina/toxicidad , Solventes/toxicidad , Triticum/efectos de los fármacos , Aguas Residuales/microbiología , Animales , Glucosa/metabolismo , Glicerol/metabolismo , Enlace de Hidrógeno , Ácido Oxálico/metabolismo
11.
Ecotoxicol Environ Saf ; 99: 1-12, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24210364

RESUMEN

Over past decades ionic liquids, a promising alternative to traditional organic solvents, have been dramatically expanding in popularity as a new generation of chemicals with potential uses in various areas in industry. In the literature these compounds have often been referred to as environmentally friendly; however, in recent years the perception of their greenness dramatically changed as the scientific community began to proactively assess the risk of their application based on the entire life-cycle. This review gives a brief overview of the current knowledge regarding the potential risks linked to the application of ionic liquids - from preparation to their disposal, with special emphasis on their potential environmental impacts and future directions in designing inherently safer ionic liquids.


Asunto(s)
Ambiente , Contaminantes Ambientales/toxicidad , Líquidos Iónicos/toxicidad , Animales , Microbiología Ambiental , Líquidos Iónicos/química , Pruebas de Toxicidad
12.
Ecotoxicol Environ Saf ; 101: 116-23, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24507136

RESUMEN

We studied the effects of five imidiazolium based ionic liquids with different anions and length of alkyl chains linked to imidazolium ring on the early development of barley (Hordeum vulgare). The inhibitory effect depends on the ionic liquids concentration and chemical structure, whereby the most toxic one was [C10mim][Br], followed by [C7mim][Br], [C4mim][Br], [C4mim][CH3CO2] and [C4mim][BF4]. Both anion and cation structures affected the toxicity of ionic liquid indicating that selection of more biocompatible anions such as [CH3CO2] does not necessarily indicate lower toxicity. Alternation in the extent of oxidative stress and antioxidant enzymes activities were found in barley plants due to ionic liquid treatments. When seedlings were exposed to higher concentrations of ionic liquids, antioxidant system could not effectively remove reactive oxidative species, leading to lipid peroxidation and damage of the photosynthetic system. However, overall data indicated that the performance of barley seedling was improved when all measured enzymes involved in scavenging of reactive oxygen species (ROS) were increased with special emphasis on GPX activities. Since there are no studies about ionic liquid (IL) toxicity in plants, that simultaneously evaluates the antioxidative enzyme system in response to different ILs, this work is valuable for gaining knowledge about the protection mechanism of plants from oxidative stress caused by IL exposure.


Asunto(s)
Aniones/química , Hordeum/efectos de los fármacos , Imidazoles/química , Imidazoles/farmacología , Líquidos Iónicos/química , Líquidos Iónicos/toxicidad , Germinación/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Plantones/efectos de los fármacos
13.
Molecules ; 19(8): 12852-80, 2014 Aug 21.
Artículo en Inglés | MEDLINE | ID: mdl-25153883

RESUMEN

Our previous studies showed that alteration of dipeptides Y-Fca-Ala-OMe (III) into Y-Ala-Fca-OMe (IV) (Y=Ac, Boc; Fca=1'-aminoferrocene-1-carboxylic acid) significantly influenced their conformational space. The novel bioconjugates Y-Fca-Pro-OMe (1, Y=Ac; 2, Y=Boc) and Y-Pro-Fca-OMe (3, Y=Boc; 4, Y=Ac) have been prepared in order to investigate the influence of proline, a well-known turn-inducer, on the conformational properties of small organometallic peptides with an exchanged constituent amino acid sequences. For this purpose, peptides 1-4 were subjected to detailed spectroscopic analysis (IR, NMR, CD spectroscopy) in solution. The conformation of peptide 3 in the solid state was determined. Furthermore, the ability of the prepared conjugates to inhibit the growth of estrogen receptor-responsive MCF-7 mammary carcinoma cells and HeLa cervical carcinoma cells was tested.


Asunto(s)
Antineoplásicos/farmacología , Ácidos Carboxílicos/química , Compuestos Ferrosos/química , Oligopéptidos/farmacología , Prolina/análogos & derivados , Prolina/síntesis química , Antineoplásicos/química , Supervivencia Celular/efectos de los fármacos , Dicroismo Circular , Cristalografía por Rayos X , Ensayos de Selección de Medicamentos Antitumorales , Células HeLa , Humanos , Enlace de Hidrógeno , Concentración 50 Inhibidora , Células MCF-7 , Oligopéptidos/química , Prolina/farmacología , Estructura Secundaria de Proteína
14.
Ecotoxicol Environ Saf ; 92: 112-8, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23561264

RESUMEN

Increasing interest in the application of ionic liquids as green replacement for volatile organic solvents emphasized the need for the evaluation of their toxic effects at different biological systems in order to reduce the risk for human health and environment. To our knowledge, effects of imidazolium ionic liquids on cellular level of fish cell lines have not been studied yet. The cytotoxicity of imidazolium ionic liquids containing different anions and alkyl chain lengths as the substituent at the cation ring towards the fish CCO cell line was determined by WST-1 proliferation assay. Morphological alterations were examined by fluorescent microscopy using acridine orange/ethidium bromide staining and flow cytometry analysis was also performed. The results showed concentration-dependent cytotoxicity of ionic liquids in CCO cells, related to the type of anion and alkyl chain length, while EC50 values showed moderate to high cytotoxicity of tested imidazolium ionic liquids. Distinct morphological changes observed under fluorescence microscope and data obtained by flow cytometry suggest that the toxicity of imidazolium ionic liquids with longer alkyl chains could be related to necrosis. Results presented in here may be helpful for filling existing gaps of knowledge about ionic liquids toxicity and their impact on aquatic environment.


Asunto(s)
Imidazoles/toxicidad , Líquidos Iónicos/toxicidad , Ovario/efectos de los fármacos , Contaminantes Químicos del Agua/toxicidad , Animales , Cationes , Línea Celular , Femenino , Ictaluridae
15.
Foods ; 12(11)2023 May 31.
Artículo en Inglés | MEDLINE | ID: mdl-37297459

RESUMEN

The recovery of valuable bioactive compounds from the main underutilised by-products of the food industry is one of the greatest challenges to be addressed in circular economy. Potato peels are the largest waste generated during potato processing. However, they could be a potential source of valuable bioactive compounds, such as polyphenols, that can be reused as natural antioxidants. Currently, environmentally benign enabling technologies and new types of non-toxic organic solvents for the extraction of bioactive compounds may dramatically improve the sustainability of these processes. This paper focuses on the potential inherent in the valorisation of violet potato peels (VPPs) by recovering antioxidants using natural deep eutectic solvents (NaDES) under ultrasound (US)- and microwave (MW)-assisted extraction. Both the enabling technologies provided performances that were superior to those of conventional extractions in terms of antioxidant activity determined by the DPPH· (2,2-diphenyl-1-picrylhydrazyl) assay. In particular, the most promising approach using NaDES is proven to be the acoustic cavitation with a Trolox eq. of 1874.0 mmolTE/gExtr (40 °C, 500 W, 30 min), vs. the 510.1 mmolTE/gExtr of hydroalcoholic extraction (80 °C, 4 h). The shelf-life of both hydroalcoholic and NaDES-VPPs extracts have been assessed over a period of 24 months, and found that NaDES granted a 5.6-fold shelf-life extension. Finally, the antiproliferative activity of both hydroalcoholic and NaDES-VPPs extracts was evaluated in vitro using the MTS assay on human tumour Caco-2 cells and normal human keratinocyte cells (HaCaT). In particular, NaDES-VPPs extracts exhibited a significantly more pronounced antiproliferative activity compared to the ethanolic extracts without a noteworthy difference between effects on the two cell lines.

16.
Antioxidants (Basel) ; 12(10)2023 Sep 23.
Artículo en Inglés | MEDLINE | ID: mdl-37891876

RESUMEN

Pomegranate (Punica granatum L.) is well known for its high content of bioactives, including polyphenols, flavonoids, and tannins, which have been shown to exhibit a wide range of biological activities, such as antioxidant, antimicrobial, and anticancer effects. It is worth noting that the majority of these molecules are found in the peels, which are usually disposed of after processing, causing a significant amount of waste, amounting to more than 3.6 million t/y. This work investigates microwave-assisted extraction (MAE) in water for the recovery of antioxidants from pomegranate peels (PP), including the optimisation of temperature and extraction times. The total phenolic, anthocyanin, flavonoid, and tannin contents of the recovered extracts were determined, as well as their antioxidant activities, which were found to be 356.35 mgGAE/gExtr, 303.97 µgCy3G/gExtr, 37.28 mgQE/gExtr, 56.48 mgGAE/gExtr, and 5.72 mmolTE/gExtr, respectively (according to the adopted reference). All results were compared with those obtained using a conventional protocol. In addition, the potential for water recycling by means of downstream nanofiltration in optimised MAE was investigated, leading to overall water reuse of approx. 75%. Power consumption (20.92 W/mgGAE) and common green metrics, Reaction Mass Efficiency (RME), E-Factor, and the Process Mass Intensiti/efficiency (PMI, PME), were considered in evaluating the proposed PP valorisation strategy. Finally, the biological activities of the main products were assessed. The antimicrobial properties of the PP extracts against three Gram-positive and three Gram-negative bacteria and their antiproliferative activity towards human cancer cells were tested. S. aureus bacteria was the most susceptible to the PP extracts. All tested products displayed antiproliferative activity against HeLa cells when higher concentrations were tested, with D-PP/NF (obtained from dried PP and sequential nanofiltration) being the most effective. This result was also confirmed via clonogenic analysis, which generally indicated the possible anti-cancer activity of pomegranate peel extracts obtained using this green approach.

17.
Bull Environ Contam Toxicol ; 86(3): 252-7, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21327609

RESUMEN

The effects of synthetic estrogens 17α-ethynylestradiol (EE2) and diethylstilbestrol (DES) were compared on cell proliferation and morphology in Channel Catfish Ovary (CCO) and Chinese Hamster Ovary (CHO-K1) cells. EE2 exposure (0.1 and 0.5 µg/mL) induced stimulatory effect on CCO and CHO-K1 cell proliferation, while higher concentrations (1-10 µg/mL) showed cytotoxic effects. Increase in DES concentrations mainly resulted in dose-depended increase in cytotoxicity in both cell lines. Morphological changes induced by EE2 and DES exposure (5 µg/mL) showed disrupted cell monolayer and increased number and size of lysosomes. Comparison of IC(50) values showed almost equal sensitivity towards cytotoxicity of tested compounds in CCO and CHO-K1 cells.


Asunto(s)
Citotoxinas/toxicidad , Dietilestilbestrol/toxicidad , Estrógenos/toxicidad , Etinilestradiol/toxicidad , Animales , Células CHO , Cricetinae , Cricetulus , Femenino , Ovario/efectos de los fármacos
18.
Antioxidants (Basel) ; 9(11)2020 Oct 31.
Artículo en Inglés | MEDLINE | ID: mdl-33142668

RESUMEN

Interest in bioactive phytochemicals and sustainable processes is the driving force behind this study on two novel green extraction methods for the recovery of anthocyanins from the residues of blueberry processing. Five natural deep eutectic solvents (NADES) have been tested for anthocyanin extraction. Acidified hydroalcoholic solutions were used as benchmarks and the shelf life of eutectic systems was monitored. The most promising NADES was tested in microwave (MAE)- and ultrasound-assisted extractions (UAEs), and Peleg's kinetic model was used. Both the enabling technologies provided performance that was superior to that of conventional extraction. MAE and UAE yielded up to 25.83 and 21.18 mg/gmatrix of total anthocyanin content, respectively, after 15 and 30 min. Moreover, a preliminary test for extract concentration and NADES recycling was performed using resin adsorption. Finally, the antiproliferative activity of the extracts was determined by a CellTiter 96® AQueous One Solution Cell Proliferation Assay, the so-called MTS assay, on human tumour HeLa cells and human skin HaCaT cells. Nonconventional extracts exhibited strong antiproliferative activity that was much greater than that of their conventionally extracted analogues. Flow cytometry was used to evaluate cell-death type, and apoptosis was found to be the primary cause of tumour cell death. The presented study demonstrates that the implementation of enabling extraction technologies and green solvents can produce an antiproliferative agent from a food industry byproduct.

19.
Toxicol Mech Methods ; 19(8): 518-23, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19788352

RESUMEN

Lindane, a toxic insecticide from the persistent organic pollutants (POP's) group, may act as an endocrine disrupter affecting crucial tissues of reproductive system. In this study a Chinese Hamster Ovary cell line (CHO-K1) was applied to assess the potential of lindane cytotoxicity at the cellular level. The methods of Trypan blue exclusion, MTT and Kenacid blue assays were used to assess cytotoxicity and confirmed a decrease in the number of viable CHO-K1 cells at 34.4-344 microM lindane during 24, 48 and 72 hours of exposure. The cell proliferation tests showed significant inhibition (p < 0.025-0.001 vs control) and a progressive increase in toxicity with increasing lindane concentrations. Corresponding IC(50) values were determined with each applied method. After 72 h of lindane exposure, IC(50) values were 184 microM according to the Trypan blue method and 272 and 256 microM with the Kenacid blue and MTT assays, respectively. Morphological changes induced by the cytotoxicity of lindane were followed by the fluorescence microscopy and only necrotic cells were detected. Vitamin E (25 and 50 microg/mL) was used for protection of ovarian cells against lidane-induced oxidative stress damage, and lipid peroxidation was postulated as a possible mechanism of lindane toxicity. The viability of cells pre-incubated with vitamin E was significantly enhanced (up to p < 0.025) compared to the results observed in cells exposed to lindane only, but vitamin E treatment could not prevent complete lindane-induced cytotoxicity. Results suggest that vitamin E may exert a slightly protective role in cell defense against lipophilic pro-oxidant xenobiotics such as lindane.


Asunto(s)
Antioxidantes/farmacología , Citoprotección , Hexaclorociclohexano/toxicidad , Insecticidas/toxicidad , Oxidantes/toxicidad , Vitamina E/farmacología , Animales , Células CHO , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Cricetinae , Cricetulus , Relación Dosis-Respuesta a Droga , Concentración 50 Inhibidora , Factores de Tiempo
20.
Lipids ; 54(2-3): 189-200, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30891791

RESUMEN

Rapeseed and its oil are the source of many biologically active substances. From crude rapeseed oil, canolol is isolated and from edible oil its dimer. Herein, we tested the biological activity of those two compounds isolated from the oils by determining their antioxidant capacity and in vitro cytotoxicity on human tumor cell lines. Canolol and its dimer showed antiproliferative activity on both cell lines with IC50 values of 46.45 µM in HeLa, and 51.19 µM in MCF7 cells, respectively. Evaluation of cell death was also done, while the oxygen radical absorbance capacity method confirmed that the canolol dimer has higher antioxidant potential than canolol. Stability of canolol and its dimer under different storage conditions showed that for a longer period of time both compounds should be stored in a freezer, but also that the dimer is more stable against degradation than canolol. Presented results indicate possible applications of canolol and its dimer in the food and pharmaceutical industry as a natural antioxidant and an anticancer agent, respectively.


Asunto(s)
Brassica rapa/química , Fenoles/química , Aceites de Plantas/farmacología , Antioxidantes/metabolismo , Supervivencia Celular/efectos de los fármacos , Cromatografía Líquida de Alta Presión , Células HeLa , Humanos , Células MCF-7 , Fenoles/farmacología
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