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1.
J Agric Food Chem ; 72(10): 5197-5211, 2024 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-38477041

RESUMO

Broccoli has gained popularity as a highly consumed vegetable due to its nutritional and health properties. This study aimed to evaluate the composition profile and the antioxidant capacity of a hydrophilic extract derived from broccoli byproducts, as well as its influence on redox biology, Alzheimer's disease markers, and aging in the Caenorhabditis elegans model. The presence of glucosinolate was observed and antioxidant capacity was demonstrated both in vitro and in vivo. The in vitro acetylcholinesterase inhibitory capacity was quantified, and the treatment ameliorated the amyloid-ß- and tau-induced proteotoxicity in transgenic strains via SOD-3 and SKN-1, respectively, and HSP-16.2 for both parameters. Furthermore, a preliminary study on aging indicated that the extract effectively reduced reactive oxygen species levels in aged worms and extended their lifespan. Utilizing broccoli byproducts for nutraceutical or functional foods could manage vegetable processing waste, enhancing productivity and sustainability while providing significant health benefits.


Assuntos
Doença de Alzheimer , Brassica , Proteínas de Caenorhabditis elegans , Animais , Antioxidantes/metabolismo , Estresse Oxidativo , Proteínas de Caenorhabditis elegans/metabolismo , Brassica/metabolismo , Acetilcolinesterase , Extratos Vegetais/farmacologia , Envelhecimento , Caenorhabditis elegans , Espécies Reativas de Oxigênio , Oxirredução , Longevidade , Biologia
2.
Food Chem ; 444: 138516, 2024 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-38306771

RESUMO

In this study, the phytochemical profile of fifty olive leaves (OL) extracts from Spain, Italy, Greece, Portugal, and Morocco was characterized and their anti-cholinergic, anti-inflammatory, and antioxidant activities were evaluated. Luteolin-7-O-glucoside, isoharmnentin, and apigenin were involved in the acetylcholinesterase (AChE) inhibitory activity, while oleuropein and hydroxytyrosol showed noteworthy potential. Secoiridoids contributed to the cyclooxygenase-2 inhibitory activity and antioxidant capacity. Compounds such as oleuropein, ligstroside and luteolin-7-O-glucoside, may exert an important role in the ferric reducing antioxidant capacity. It should be also highlighted the role of hydroxytyrosol, hydroxycoumarins, and verbascoside concerning the antioxidant activity. This research provides valuable insights and confirms that specific compounds within OL extracts contribute to distinct anti-cholinergic, anti-inflammatory, and anti-oxidative effects.


Assuntos
Antioxidantes , Glucosídeos Iridoides , Olea , Álcool Feniletílico/análogos & derivados , Antioxidantes/química , Acetilcolinesterase , Olea/química , Ciclo-Oxigenase 2 , Extratos Vegetais/química , Iridoides/análise , Compostos Fitoquímicos/análise , Folhas de Planta/química , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/análise , Antagonistas Colinérgicos/análise
3.
Adv Food Nutr Res ; 107: 193-212, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37898540

RESUMO

Olive (Olea europaea) is a native species from the Mediterranean region and widely cultivated for its edible fruit, known as olives. Olives are a rich source of monounsaturated fatty acids, vitamin E, and polyphenols, and have been shown to have various health benefits. They are commonly used for cooking and are also employed in cosmetics and the pharmaceutical industry. The extract obtained from olive fruits and several subproducts of the olive industry has demonstrated several biological activities mainly associated with their antioxidant and inflammatory properties. Thus, olives, olive-derived products, and subproducts of the olive industry have gained popularity in recent years due to their potential health benefits and their use in traditional medicine. The present chapter summarizes the main applications of Olea europaea and olive oil processing by-products as therapeutic agents against cancer, cardiovascular diseases, and antimicrobial agents.


Assuntos
Anti-Infecciosos , Olea , Azeite de Oliva/análise , Polifenóis , Frutas/química , Anti-Infecciosos/farmacologia
4.
Int J Mol Sci ; 24(5)2023 Feb 22.
Artigo em Inglês | MEDLINE | ID: mdl-36901783

RESUMO

Alzheimer's Disease (AD) is the cause of around 60-70% of global cases of dementia and approximately 50 million people have been reported to suffer this disease worldwide. The leaves of olive trees (Olea europaea) are the most abundant by-products of the olive grove industry. These by-products have been highlighted due to the wide variety of bioactive compounds such as oleuropein (OLE) and hydroxytyrosol (HT) with demonstrated medicinal properties to fight AD. In particular, the olive leaf (OL), OLE, and HT reduced not only amyloid-ß formation but also neurofibrillary tangles formation through amyloid protein precursor processing modulation. Although the isolated olive phytochemicals exerted lower cholinesterase inhibitory activity, OL demonstrated high inhibitory activity in the cholinergic tests evaluated. The mechanisms underlying these protective effects may be associated with decreased neuroinflammation and oxidative stress via NF-κB and Nrf2 modulation, respectively. Despite the limited research, evidence indicates that OL consumption promotes autophagy and restores loss of proteostasis, which was reflected in lower toxic protein aggregation in AD models. Therefore, olive phytochemicals may be a promising tool as an adjuvant in the treatment of AD.


Assuntos
Doença de Alzheimer , Olea , Humanos , Polifenóis/farmacologia , Olea/química , Iridoides/farmacologia , Glucosídeos Iridoides , Folhas de Planta , Extratos Vegetais/farmacologia
5.
Int J Mol Sci ; 25(1)2023 Dec 24.
Artigo em Inglês | MEDLINE | ID: mdl-38203451

RESUMO

Tagetes erecta is an edible flower deeply rooted in traditional Mexican culture. It holds a central role in the most popular and iconic Mexican celebration, "the Day of the Dead". Furthermore, it is currently receiving interest as a potential therapeutic agent, motivated mainly by its polyphenol content. The present study aims to evaluate the biological activity of an extract synthesized from the petals of the edible flower T. erecta. This extract showed significant antioxidant scores measured by the most common in vitro methodologies (FRAP, ABTS, and DPPH), with values of 1475.3 µM trolox/g extr, 1950.3 µM trolox/g extr, and 977.7 µM trolox/g extr, respectively. In addition, up to 36 individual polyphenols were identified by chromatography. Regarding the biomedical aspects of the petal extract, it exhibited antitumoral activity against ovarian carcinoma cells evaluated by the MTS assay, revealing a lower value of IC50 compared to other flower extracts. For example, the extract from T. erecta reported an IC50 value half as low as an extract from Rosa × hybrida and six times lower than another extract from Tulbaghia violacea. This antitumoral effect of T. erecta arises from the induction of the apoptotic process; thus, incubating ovarian carcinoma cells with the petal extract increased the rate of apoptotic cells measured by flow cytometry. Moreover, the extract also demonstrated efficacy as a therapeutic agent against tauopathy, a feature of Alzheimer's disease (AD) in the Caenorhabditis elegans experimental model. Treating worms with the experimental extract prevented disfunction in several motility parameters such as wavelength and swimming speed. Furthermore, the T. erecta petal extract prevented the release of Reactive Oxygen Species (ROS), which are associated with the progression of AD. Thus, treatment with the extract resulted in an approximate 20% reduction in ROS production. These findings suggest that these petals could serve as a suitable source of polyphenols for biomedical applications.


Assuntos
Doença de Alzheimer , Carcinoma , Neoplasias Ovarianas , Tagetes , Tauopatias , Feminino , Humanos , Animais , Antioxidantes/farmacologia , Caenorhabditis elegans , Espécies Reativas de Oxigênio , Carcinoma Epitelial do Ovário , Flores , Polifenóis/farmacologia , Extratos Vegetais/farmacologia
6.
Molecules ; 26(8)2021 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-33916916

RESUMO

In recent times, scientific attention has been paid to different foods and their bioactive components for the ability to inhibit the onset and progress of different types of cancer. Nigella sativa extract, powder and seed oil and its main components, thymoquinone and α-hederin, have showed potent anticancer and chemosensitizing effects against various types of cancer, such as liver, colon, breast, renal, cervical, lung, ovarian, pancreatic, prostate and skin tumors, through the modulation of various molecular signaling pathways. Herein, the purpose of this review was to highlight the anticancer activity of Nigella sativa and it constitutes, focusing on different in vitro, in vivo and clinical studies and projects, in order to underline their antiproliferative, proapoptotic, cytotoxic and antimetastatic effects. Particular attention has been also given to the synergistic effect of Nigella sativa and it constitutes with chemotherapeutic drugs, and to the synthesized analogs of thymoquinone that seem to enhance the chemo-sensitizing potential. This review could be a useful step towards new research on N. sativa and cancer, to include this plant in the dietary treatments in support to conventional therapies, for the best achievement of therapeutic goals.


Assuntos
Anticarcinógenos/química , Anticarcinógenos/farmacologia , Benzoquinonas/química , Benzoquinonas/farmacologia , Nigella sativa/química , Valor Nutritivo , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Animais , Anticarcinógenos/uso terapêutico , Benzoquinonas/uso terapêutico , Biomarcadores , Estudos Clínicos como Assunto , Suscetibilidade a Doenças , Avaliação Pré-Clínica de Medicamentos , Humanos , Neoplasias/tratamento farmacológico , Neoplasias/etiologia , Neoplasias/metabolismo , Neoplasias/prevenção & controle , Extratos Vegetais/uso terapêutico , Transdução de Sinais/efeitos dos fármacos , Relação Estrutura-Atividade
7.
Adv Food Nutr Res ; 95: 295-336, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33745515

RESUMO

Inflammation is a key mechanism of the immune system that can be elicited by several factors, among them several chemical, physical and biological agents. Once stimulated, the inflammatory response activates a series of signaling pathways and a number of immune cells which promote, in a very coordinated manner, the neutralization of the infectious agent. However, if uncontrolled, the inflammatory status may become chronic leading, potentially, to tissue damage and disease onset. Several risk factors are associated with the development of chronic inflammation and, among these factors, diet plays an essential role. In this chapter the effects of some dietary bioactive compounds, including micronutrients, omega-3 fatty acids, nucleotides and polyphenols, on the immunoinflammatory responses in different cellular, animal and human studies have been summarized.


Assuntos
Ácidos Graxos Ômega-3 , Animais , Dieta , Ácidos Graxos Ômega-3/farmacologia , Humanos , Inflamação/tratamento farmacológico , Micronutrientes , Polifenóis/farmacologia
8.
Food Chem Toxicol ; 149: 112018, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33549632

RESUMO

Edible flowers are being used as a new ingredient in modern gastronomy. Recently, these products have also gained interest as an important source of phenolic compounds with potential for biomedical applications. The present work studied a methanolic extract of Rosa x hybrida in which 35 individual phenolic compounds were identified. The extract has been evaluated for its antiproliferative properties in ovarian carcinoma cells. Results showed that the antiproliferative effect was associated with the induction of autophagy and apoptosis with the concomitant ROS increase probably related to mitochondria dysfunction. These antiproliferative effects might be associated with some components of the extract such as quercetin. The extract did not induce damage in healthy cells and that it was able to improve the wound healing activity. The present study also evaluated the properties of the mentioned extract in vivo in C. elegans. Tests demonstrated a lack of toxicity in the worm model. Promising results have been obtained in transgenic strains of C. elegans that produce human beta amyloid peptide, suggesting the possible utility of the extract from the point of view of Alzheimer disease. Altogether, results suggest that Rosa x hybrida extracts could be a new tool for the development of functional foods.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Extratos Vegetais/farmacologia , Rosa/química , Animais , Antineoplásicos Fitogênicos/química , Caenorhabditis elegans/efeitos dos fármacos , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Fibroblastos/efeitos dos fármacos , Flores , Humanos , Extratos Vegetais/química , Espécies Reativas de Oxigênio/metabolismo
9.
Food Funct ; 11(1): 297-304, 2020 Jan 29.
Artigo em Inglês | MEDLINE | ID: mdl-31915782

RESUMO

In recent years, the conversion of white adipocytes to brown-like adipocytes by pharmacological and dietary compounds has gained attention as an effective strategy to fight obesity. Strawberry bioactive compounds present several biological activities including antioxidant, anti-inflammatory, anti-cancer, anti-atherosclerotic and antiadipogenic properties. However, to the best of our knowledge, the possible role of strawberry bioactive compounds in white adipose tissue (WAT) browning has never been explored. Our results demonstrated that a strawberry methanolic extract (SE) significantly reduced 3T3-L1 pre-adipocytes differentiation, and down-regulated the mRNA expression of the adipogenic transcription factors CCAAT/enhancer-binding protein (C/REB- α) and peroxisome proliferation-activated receptor (PPAR-γ). It also down-regulated the mRNA expression of resistin and angiotensinogen, two genes considered as markers of white adipocytes, while increased the mRNA expression of pyruvate dehydrogenase lipoamide kinase isozyme 4 (PDK4) and uncoupling protein 1 (UCP1) which, conversely, are brown adipocyte-specific markers. Likewise, SE stimulated AMP-activated protein kinase (AMPKα), sirtuin 1 (Sirt1) and the peroxisome proliferator activated receptor gamma coactivator 1-alpha (PGC-1α), suggesting a possible increase in mitochondrial biogenesis. It also stimulated oxygen consumption rate and uncoupled respiration. Taken together, all these results suggest that SE induces brown fat-like phenotype in 3T3-L1 cells and may have potential therapeutic implications for treatment and/or prevention of obesity.


Assuntos
Adipócitos Marrons/citologia , Adipócitos Brancos/efeitos dos fármacos , Adipogenia/efeitos dos fármacos , Fragaria/química , Extratos Vegetais/farmacologia , Células 3T3-L1 , Proteínas Quinases Ativadas por AMP/metabolismo , Adipócitos Brancos/citologia , Animais , Proteína alfa Estimuladora de Ligação a CCAAT/metabolismo , Diferenciação Celular , Metanol , Camundongos , PPAR gama/metabolismo , Piruvato Desidrogenase Quinase de Transferência de Acetil/metabolismo , Sirtuína 1/metabolismo , Fatores de Transcrição/metabolismo , Proteína Desacopladora 1/metabolismo
10.
Nutrients ; 11(10)2019 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-31591312

RESUMO

Diet plays a decisive role in heart physiology, with lipids having especial importance in pathology prevention and development. This study aimed to investigate how dietary lipids varying in lipid profile (virgin olive oil, sunflower oil or fish oil) affected the heart of rats during aging. Heart histopathology, mitochondrial morphometry, and oxidative status were assessed. Typical histopathological features associated with aging, such as valvular lesions, endomyocardical hyperplasia, or papillary muscle calcification, were found at a low extent in all the experimental groups. The most relevant finding was that inflammation registered by fish oil group was lower compared to the other treatments. At the ultrastructural level, heart mitochondrial area, perimeter, and aspect ratio were higher in fish oil-fed rats than in those fed on sunflower oil. Concerning oxidative stress markers, there were differences only in coenzyme Q levels and catalase activity, lower in sunflower oil-fed animals compared with those fed on fish oil. In summary, dietary intake for a long period on dietary fats with different fatty acids profile led to differences in some aspects associated with the aging process at the heart. Fish oil seems to be the fat most protective of heart during aging.


Assuntos
Óleos de Peixe/administração & dosagem , Cardiopatias/prevenção & controle , Longevidade , Mitocôndrias Cardíacas/ultraestrutura , Miocárdio/ultraestrutura , Azeite de Oliva/administração & dosagem , Óleo de Girassol/administração & dosagem , Fatores Etários , Ração Animal , Animais , Óleos de Peixe/metabolismo , Cardiopatias/metabolismo , Cardiopatias/patologia , Masculino , Mitocôndrias Cardíacas/metabolismo , Miocárdio/metabolismo , Azeite de Oliva/metabolismo , Estresse Oxidativo , Ratos Wistar , Óleo de Girassol/metabolismo , Fatores de Tempo
11.
J Cell Physiol ; 234(5): 7622-7633, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30317591

RESUMO

Uterine leiom yomas are benign tumors highly prevalent in reproductive women. In thecurrent study, initially, we aimed to screen five different strawberry cultivars (Alba, Clery, Portola, Tecla, and Romina) to identify efficient cultivars in terms of phytochemical characterization and biological properties by measuring phenolic and anthocyanin content as well as antioxidant capacity, and by measuring apoptotic rate and reactive oxygen species (ROS) production in uterine leiomyoma cells. Next, we focused on the most efficient ones, cultivar Alba (A) and Romina (R) as well as Romina anthocyanin (RA) fraction for their ability to regulate oxidative phosphorylation (oxygen consumption rate [OCR]) glycolysis (extracellular acidification rate [ECAR]), and also fibrosis. Leiomyoma and myometrial cells were treated with a methanolic extract of A and R (250 µg/ml) or with RA (50 µg/ml) for 48 hr to measure OCR and ECAR, as well as gene expression associated with fibrosis. In the leiomyoma cells, RA was more effective in inducing apoptosis and increasing intracellular ROS levels, followed by R and A. In myometrial cells, all strawberry treatments increased the cellular viability and decreased ROS concentrations. Leiomyoma cells showed also a significant decrease in ECAR, especially after RA treatment, while OCR was slightly increased in both myometrial and leiomyoma cells. R and RA treatment significantly decreased collagen 1A1, fibronectin, versican, and activin A messenger RNA expression in leiomyoma cells. In conclusion, this study suggests that Romina, or its anthocyanin fraction, can be developed as a therapeutic and/or preventive agent for uterine leiomyomas, confirming the healthy effects exerted by these fruits and their bioactive compounds.


Assuntos
Fragaria/química , Leiomioma/tratamento farmacológico , Preparações de Plantas/farmacologia , Neoplasias Uterinas/tratamento farmacológico , Ativinas/farmacologia , Antioxidantes/metabolismo , Apoptose/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Colágeno Tipo I/metabolismo , Feminino , Fibronectinas/metabolismo , Fibrose/tratamento farmacológico , Fibrose/metabolismo , Expressão Gênica/efeitos dos fármacos , Glicólise/efeitos dos fármacos , Humanos , Leiomioma/metabolismo , Fosforilação Oxidativa/efeitos dos fármacos , Espécies Reativas de Oxigênio/metabolismo , Células Tumorais Cultivadas , Neoplasias Uterinas/metabolismo , Versicanas/farmacologia
12.
Int J Mol Sci ; 19(8)2018 Jul 26.
Artigo em Inglês | MEDLINE | ID: mdl-30049933

RESUMO

Strawberry fruits are highly appreciated by consumers worldwide due to their bright red color, typical aroma, and juicy texture. While the biological activity of the complete fruit has been widely studied, the potential beneficial effects of the achenes (commonly named seeds) remain unknown. In addition, when raw fruit and achenes are consumed, the digestion process could alter the release and absorption of their phytochemical compounds, compromising their bioactivity. In the present work, we evaluated the protective effects against oxidative damage of nondigested and digested extracts from strawberry fruit and achenes in human hepatocellular carcinoma (HepG2) cells. For that purpose, cells were treated with different concentration of the extracts prior to incubation with the stressor agent, AAPH (2,2'-azobis(2-amidinopropane) dihydrochloride). Subsequently, intracellular accumulation of reactive oxygen species (ROS) and the percentage of live, dead, and apoptotic cells were determined. Our results demonstrated that all the evaluated fractions were able to counteract the AAPH-induced damage, suggesting that the achenes also present biological activity. The positive effects of both the raw fruit and achenes were maintained after the in vitro digestion process.


Assuntos
Antioxidantes/química , Antioxidantes/farmacologia , Fragaria/química , Hepatócitos/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Amidinas/efeitos adversos , Antioxidantes/isolamento & purificação , Apoptose/efeitos dos fármacos , Frutas/química , Células Hep G2 , Hepatócitos/metabolismo , Humanos , Extratos Vegetais/isolamento & purificação , Espécies Reativas de Oxigênio/metabolismo , Sementes/química
13.
Free Radic Biol Med ; 126: 41-54, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-30056083

RESUMO

The development of chemo-sensitizers is urgently needed to overcome 5-fluorouracil (5-FU) therapeutic resistance and adverse toxicity in colorectal cancer. This work aims to evaluate the synergic effects of 5-FU and Manuka honey (MH), a rich source of bioactive compounds, in enhancing the anticancer effects of this drug on human colon cancer HCT-116 and LoVo cells. Compared to 5-FU alone, MH synergistically enhanced the chemotherapeutic effects of 5-FU, by reducing cell proliferation through the suppression of EGFR, HER2, p-Akt and p-mTOR expression, and promoting apoptosis by the modulation pro-apoptotic (p53, Bax, Cyto c, FasL caspase-3, -8, -9 and cleave-PARP) and anti-apoptotic (Bcl-2) markers. The activations of p-p38MAPK and p-Erk1/2 pathways and ROS production were also involved in this process. Downregulation of transcription factor (NF-κB and Nrf2) and antioxidant enzyme activity (SOD, catalase, glutathione peroxidase and glutathione reductase) and expression (SOD, catalase and HO-1) were more evident after the combined treatment, leading to more cell death by oxidative stress. Moreover, additive effects were also observed by increasing lipid and protein oxidation and arresting cell cycle. All the parameters of mitochondrial respiration and glycolysis function decreased and both cells entered the quiescent stage after the combined treatments. MH also influenced the anti-metastasis effects of 5-FU by decreasing migration ability, suppressing the expression of MMP-2, MMP-9 and increasing N-cadherin and E-cadherin. In conclusion, MH could be a useful preventive or adjuvant agent in the treatment of colorectal cancer with 5-FU.


Assuntos
Neoplasias do Colo/tratamento farmacológico , Sinergismo Farmacológico , Mel , Estresse Oxidativo/efeitos dos fármacos , Apoptose/efeitos dos fármacos , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Neoplasias do Colo/genética , Neoplasias do Colo/patologia , Fluoruracila/farmacologia , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Células HCT116 , Humanos , Leptospermum/química , Metástase Neoplásica , Proteínas de Neoplasias/genética
14.
Food Chem Toxicol ; 119: 73-85, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29753866

RESUMO

The aim of the present work was to evaluate the phenolic profile of the 'Brava' extra virgin olive oil and assess its potential as a "natural adjuvant" in combination with chemotherapy treatment. The total phenol content of the phenolic extracts was 764 mg gallic acid equivalents/kg and the total antioxidant capacity was 2309, 1881 and 2088 µM trolox equivalents/kg determined by Diphenyl-1-picrylhydrazyl free radical method, Ferric Reducing Antioxidant Power and Trolox Equivalent Antioxidant Capacity assay, respectively. Secoiridoids comprised 83% of the total phenolic compounds. The main secoiridoid from oleuropein was the main isomer of oleuropein aglycone (74 mg/kg). The main secoiridoid from ligstroside was the main isomer of ligstroside aglycone (214 mg/kg). These phenolic extracts showed a significant decrease in cell viability on MCF-7 breast cancer cells in a dose and time dependent manner. 48 h-treatments with different concentrations of the extracts induced intracellular ROS generation and cell death.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Azeite de Oliva/farmacologia , Fenóis/farmacologia , Extratos Vegetais/farmacologia , Antineoplásicos Fitogênicos/química , Antioxidantes/química , Antioxidantes/farmacologia , Sobrevivência Celular/efeitos dos fármacos , Cromatografia Líquida , Humanos , Células MCF-7 , Espectrometria de Massas , Azeite de Oliva/química , Fenóis/química , Extratos Vegetais/química , Espécies Reativas de Oxigênio/metabolismo
15.
Plant Foods Hum Nutr ; 73(1): 18-24, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29455277

RESUMO

We analyzed guava fruits (Psidium guajava L. cv. Red Suprema) from Cuba to determine their chemical composition, total antioxidant capacity, as well as their protective effect against oxidative damage using an in vitro model of human dermal fibroblasts. The guava fruit is a natural source of bioactive compounds, such as polyphenols, vitamin C, folates and beta carotenes with proven health benefits. Human dermal fibroblasts were pre-incubated with different concentrations of guava crude extract and then subjected to oxidative stress using the AAPH stressor. The number of apoptotic and dead cells, as well as the markers of oxidative damage such as lipid and protein oxidation significantly decreased when cells were pre-incubated with guava crude extract and then exposed to the stressor. The activity of antioxidant enzymes also improved when cells were pre-incubated with guava crude extract in comparison to cells subjected to stress without prior pre-incubation with the guava extract. The results obtained in this study highlight the health benefits of guava regarding oxidative stress, proving it to be an important source of bioactive compounds associated with important biological properties.


Assuntos
Fibroblastos/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Psidium/química , Antioxidantes/análise , Antioxidantes/farmacologia , Ácido Ascórbico/análise , Carotenoides/análise , Linhagem Celular , Cuba , Fibroblastos/metabolismo , Fibroblastos/patologia , Flavonoides/análise , Humanos , Extratos Vegetais/análise , Polifenóis/análise , Espécies Reativas de Oxigênio/metabolismo , Pele/citologia
16.
Food Chem Toxicol ; 114: 128-140, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29458159

RESUMO

A protracted pro-inflammatory state is the common denominator in the development, progression and complication of the common chronic diseases. Dietary antioxidants represent an efficient tool to counteract this inflammatory state. The aim of the present work was to evaluate the effects of strawberry extracts on inflammation evoked by E. Coli lipopolysaccharide in Human Dermal Fibroblast, by measuring reactive oxygen species production, apoptosis rate, antioxidant enzymes activity, mitochondria functionality and also investigating the molecular pathway involved in inflammatory and antioxidant response. The results demonstrated that strawberry pre-treatment reduced intracellular reactive oxygen species levels, apoptotic rate, improved antioxidant defences and mitochondria functionality in lipopolysaccharide -treated cells. Strawberry exerted these protective activities through the inhibition of the NF-kB signalling pathway and the stimulation of the Nrf2 pathway, with a mechanism AMPK-dependent. These results confirm the health benefits of strawberry in the prevention of inflammation and oxidative stress condition in lipopolysaccharide-treated cells.


Assuntos
Fibroblastos/efeitos dos fármacos , Fragaria/química , Inflamação/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Quinases Proteína-Quinases Ativadas por AMP , Apoptose/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Fibroblastos/citologia , Fibroblastos/metabolismo , Frutas/química , Humanos , Inflamação/etiologia , Inflamação/genética , Inflamação/fisiopatologia , Lipopolissacarídeos/efeitos adversos , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Fator 2 Relacionado a NF-E2/genética , Fator 2 Relacionado a NF-E2/metabolismo , Proteínas Quinases/genética , Proteínas Quinases/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Pele/citologia , Pele/efeitos dos fármacos , Pele/metabolismo
17.
Food Funct ; 8(9): 3250-3258, 2017 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-28815233

RESUMO

Acerola fruits (Malpighia emarginata DC.) from the central region of Cuba were analyzed to determine their chemical composition and protective capacity against oxidative damage using an in vitro human dermal fibroblast (HDFa) model. The chemical composition analyses showed a high content of vitamin C, total polyphenols, ß-carotene and folates in the acerola fruit. From the HPLC-DAD/ESI-MSn analyses, two anthocyanins (cyanidin 3-O-rhamnoside and pelargonidin 3-O-rhamnoside), three hydroxycinnamoyl derivatives (caffeoyl hexoside, dihydrocaffeoylquinic acid and coumaroyl hexoside) and fifteen flavonols (mostly glycosylated forms of quercetin and kaempferol) were detected. HDFa were pre-incubated with an acerola crude extract (ACExt) and subsequently subjected to oxidative stress induced by AAPH. Apoptosis, intracellular ROS and the biomarkers of lipid and protein oxidation significantly increased after inducing stress, while the activities of the antioxidant enzyme catalase and superoxide dismutase and mitochondrial functionality were markedly affected. However, ACExt was able to protect against oxidative damage through decreasing apoptosis, intracellular ROS levels and lipid and protein damage, besides improving antioxidant enzyme activities and mitochondrial functionality. The obtained results support acerola fruits as relevant sources of functional compounds with promising effects on human health.


Assuntos
Antioxidantes/metabolismo , Fibroblastos/efeitos dos fármacos , Malpighiaceae/química , Mitocôndrias/efeitos dos fármacos , Extratos Vegetais/farmacologia , Substâncias Protetoras/farmacologia , Pele/citologia , Apoptose/efeitos dos fármacos , Catalase/metabolismo , Fibroblastos/citologia , Fibroblastos/metabolismo , Frutas/química , Humanos , Mitocôndrias/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/química , Substâncias Protetoras/química , Espécies Reativas de Oxigênio/metabolismo , Pele/efeitos dos fármacos , Pele/metabolismo , Superóxido Dismutase/metabolismo
18.
Nutrients ; 9(6)2017 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-28613256

RESUMO

Extreme exposure of skin to Ultraviolet A (UVA)-radiation may induce a dysregulated production of reactive oxygen species (ROS) which can interact with cellular biomolecules leading to oxidative stress, inflammation, DNA damage, and alteration of cellular molecular pathways, responsible for skin photoaging, hyperplasia, erythema, and cancer. For these reasons, the use of dietary natural bioactive compounds with remarkable antioxidant activity could be a strategic tool to counteract these UVA-radiation-caused deleterious effects. Thus, the purpose of the present work was to test the efficacy of strawberry (50 µg/mL)-based formulations supplemented with Coenzyme Q10 (100 µg/mL) and sun protection factor 10 in human dermal fibroblasts irradiated with UVA-radiation. The apoptosis rate, the amount of intracellular reactive oxygen species (ROS) production, the expression of proteins involved in antioxidant and inflammatory response, and mitochondrial functionality were evaluated. The results showed that the synergic topical use of strawberry and Coenzyme Q10 provided a significant (p < 0.05) photoprotective effect, reducing cell death and ROS, increasing antioxidant defense, lowering inflammatory markers, and improving mitochondrial functionality. The obtained results suggest the use of strawberry-based formulations as an innovative, natural, and useful tool for the prevention of UVA exposure-induced skin diseases in order to decrease or substitute the amount of synthetic sunscreen agents.


Assuntos
Cosméticos/farmacologia , Fibroblastos/efeitos dos fármacos , Fibroblastos/efeitos da radiação , Fragaria/química , Raios Ultravioleta/efeitos adversos , Apoptose , Células Cultivadas , Cosméticos/administração & dosagem , Cosméticos/química , Dano ao DNA/efeitos dos fármacos , Dano ao DNA/efeitos da radiação , Humanos , Ubiquinona/análogos & derivados , Ubiquinona/farmacologia
19.
Nutrients ; 9(6)2017 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-28621732

RESUMO

Regulation of lipid metabolism is essential for treatment and prevention of several chronic diseases such as obesity, diabetes, and cardiovascular diseases, which are responsible for most deaths worldwide. It has been demonstrated that the AMP-activated protein kinase (AMPK) has a direct impact on lipid metabolism by modulating several downstream-signaling components. The main objective of the present work was to evaluate the in vitro effect of a methanolic strawberry extract on AMPK and its possible repercussion on lipid metabolism in human hepatocellular carcinoma cells (HepG2). For such purpose, the lipid profile and the expression of proteins metabolically related to AMPK were determined on cells lysates. The results demonstrated that strawberry methanolic extract decreased total cholesterol, low-density lipoprotein (LDL)-cholesterol, and triglycerides levels (up to 0.50-, 0.30-, and 0.40-fold, respectively) while it stimulated the p-AMPK/AMPK expression (up to 3.06-fold), compared to the control. AMPK stimulation led to the phosphorylation and consequent inactivation of acetyl coenzyme A carboxylase (ACC) and inhibition of 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), the major regulators of fatty acids and cholesterol synthesis, respectively. Strawberry treatment also entailed a 4.34-, 2.37-, and 2.47-fold overexpression of LDL receptor, sirtuin 1 (Sirt1), and the peroxisome proliferator activated receptor gamma coactivator 1-alpha (PGC-1α), respectively, compared to control. The observed results were counteracted by treatment with compound C, an AMPK pharmacological inhibitor, confirming that multiple effects of strawberries on lipid metabolism are mediated by the activation of this protein.


Assuntos
Proteínas Quinases Ativadas por AMP/metabolismo , Fragaria/química , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Metabolismo dos Lipídeos/efeitos dos fármacos , Extratos Vegetais/farmacologia , Proteínas Quinases Ativadas por AMP/genética , Antocianinas/química , Ácido Ascórbico/química , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Frutas/química , Células Hep G2 , Humanos , Concentração Inibidora 50 , Extratos Vegetais/química
20.
Ann N Y Acad Sci ; 1398(1): 62-71, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28618011

RESUMO

It is generally accepted that a fruit and vegetable-enriched diet is favorable for human health. The consumption of strawberries, in particular, has been related to the maintenance of well-being and the prevention of several chronic diseases, owing to the high contents of antioxidants and phytochemicals present in the fruit. Several biological effects have been explained through the total antioxidant capacity exerted by these bioactive compounds, but recently more intricate mechanisms have begun to be examined. In this context, it has been reported that strawberry phenolics are able to exert anti-inflammatory, anticarcinogenic, antiproliferative, and antiatherosclerotic activities, acting on specific molecular pathways related to antioxidant defenses, metabolism, survival, and proliferation. The overall aim of this work is to discuss and update the cellular and molecular mechanisms recently proposed to clarify the effects of strawberry phenolics on human health, with particular attention to the most common chronic diseases, such as metabolic syndrome, cardiovascular disease, and cancer.


Assuntos
Anti-Inflamatórios/uso terapêutico , Antioxidantes/uso terapêutico , Fragaria/química , Fenóis/uso terapêutico , Anti-Inflamatórios/química , Antioxidantes/química , Doenças Cardiovasculares/dietoterapia , Doença Crônica/tratamento farmacológico , Frutas/química , Humanos , Síndrome Metabólica/dietoterapia , Neoplasias/dietoterapia , Fenóis/química
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