scholarly journals Molecular mechanisms of the cardiovascular protective effects of polyphenols

2012 ◽  
Vol 108 (9) ◽  
pp. 1532-1549 ◽  
Author(s):  
Ramaroson Andriantsitohaina ◽  
Cyril Auger ◽  
Thierry Chataigneau ◽  
Nelly Étienne-Selloum ◽  
Huige Li ◽  
...  
Keyword(s):  
Fruits And Vegetables ◽  
Molecular Mechanisms ◽  
Health Benefits ◽  
Epidemiological Studies ◽  
No Production ◽  
Protective Effects ◽  
The Novel ◽  
The Metabolic Syndrome ◽  
Species Production ◽  
Antioxidant Effects

Epidemiological studies have reported a greater reduction in cardiovascular risk and metabolic disorders associated with diets rich in polyphenols. The antioxidant effects of polyphenols are attributed to the regulation of redox enzymes by reducing reactive oxygen species production from mitochondria, NADPH oxidases and uncoupled endothelial NO synthase in addition to also up-regulating multiple antioxidant enzymes. Although data supporting the effects of polyphenols in reducing oxidative stress are promising, several studies have suggested additional mechanisms in the health benefits of polyphenols. Polyphenols from red wine increase endothelial NO production leading to endothelium-dependent relaxation in conditions such as hypertension, stroke or the metabolic syndrome. Numerous molecules contained in fruits and vegetables can activate sirtuins to increase lifespan and silence metabolic and physiological disturbances associated with endothelial NO dysfunction. Although intracellular pathways involved in the endothelial effects of polyphenols are partially described, the molecular targets of these polyphenols are not completely elucidated. We review the novel aspects of polyphenols on several targets that could trigger the health benefits of polyphenols in conditions such as metabolic and cardiovascular disturbances.

scholarly journals The Fetal Origins of the Metabolic Syndrome: Can We Intervene?

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Noelle Ma ◽  
Daniel B. Hardy
Keyword(s):  
Metabolic Syndrome ◽  
Molecular Mechanisms ◽  
Dietary Intervention ◽  
Critical Factor ◽  
Epidemiological Studies ◽  
Fetal Life ◽  
Fetal Origins ◽  
The Metabolic Syndrome ◽  
Neonatal Life

Epidemiological studies have suggested that metabolic programming begins during fetal life and adverse eventsin uteroare a critical factor in the etiology of chronic diseases and overall health. While the underlying molecular mechanisms linking impaired fetal development to these adult diseases are being elucidated, little is known about how we can intervene early in life to diminish the incidence and severity of these long-term diseases. This paper highlights the latest clinical and pharmaceutical studies addressing how dietary intervention in fetal and neonatal life may be able to prevent aspects of the metabolic syndrome associated with IUGR pregnancies.

scholarly journals Quercetin Directly Targets JAK2 and PKCδ and Prevents UV-Induced Photoaging in Human Skin

2019 ◽  
Vol 20 (21) ◽  
pp. 5262 ◽  
Author(s):  
Shin ◽  
Lee ◽  
Hong ◽  
Lim ◽  
Byun
Keyword(s):  
Protein Kinase ◽  
Human Skin ◽  
Fruits And Vegetables ◽  
Molecular Mechanisms ◽  
Skin Aging ◽  
Janus Kinase ◽  
Activator Protein 1 ◽  
Protective Effects ◽  
Matrix Metalloproteinase 1 ◽  
Extracellular Signal

Quercetin is a naturally occurring polyphenol present in various fruits and vegetables. The bioactive properties of quercetin include anti-oxidative, anti-cancer, anti-inflammatory, and anti-diabetic effects. However, the effect of quercetin on skin aging and the direct molecular targets responsible have remained largely unknown. Herein, we investigated the protective effect of quercetin against UV-mediated skin aging and the molecular mechanisms responsible. Treatment with quercetin suppressed UV-induced matrix metalloproteinase-1 (MMP-1) and cyclooxygenase-2 (COX-2) expression and prevented UV-mediated collagen degradation in human skin tissues. Quercetin exerted potent inhibitory effects towards UV-induced activator protein-1 (AP-1) and nuclear factor-kappa B (NF-κB) activity. Further examination of the upstream signaling pathways revealed that quercetin can attenuate UV-mediated phosphorylation of extracellular signal-regulated kinase (ERK), c-Jun N terminal kinases (JNK), protein kinase B (Akt), and signal transducer and activator of transcription 3 (STAT3). Kinase assays using purified protein demonstrated that quercetin can directly inhibit protein kinase C delta (PKCδ) and Janus kinase 2 (JAK2) kinase activity. Quercetin was observed to bind to PKCδ and JAK2 in pull-down assays. These findings suggest that quercetin can directly target PKCδ and JAK2 in the skin to elicit protective effects against UV-mediated skin aging and inflammation. Our results highlight the potential use of quercetin as a natural agent for anti-skin aging applications.

scholarly journals Mechanisms of protective effects of moderate alcohol consumption on the cardiovascular system

2004 ◽  
Vol 132 (9-10) ◽  
pp. 334-339
Author(s):  
Branko Jakovljevic ◽  
Katarina Paunovic ◽  
Goran Belojevic ◽  
Vesna Stojanov
Keyword(s):  
Cardiovascular Diseases ◽  
Alcohol Consumption ◽  
Molecular Mechanisms ◽  
Blood Clot ◽  
Alcoholic Beverage ◽  
Significant Risk ◽  
Population Level ◽  
Epidemiological Studies ◽  
Alcoholic Beverages ◽  
Protective Effects

Consumption of alcoholic beverages has been known in many cultures since the ancient civilizations, so harmful consequences of excessive alcohol intake have been well explained. Many epidemiological studies confirmed lower morbidity and mortality rates of cardiovascular diseases in persons who drink alcohol "moderately" (1-2 drinks a day), independently of the kind of alcoholic beverage. This paper presents the review of molecular mechanisms that are believed to explain cardioprotective effect of moderate drinking-alcohol effects on lipoproteins, endothelial cells, blood clot formation and dissolution, as well as genetic and gender variances modifying the relation. A simple recommendation regarding the increase of alcohol consumption cannot be made on population level. The professionals must therefore concentrate on other preventive methods in order to reduce other significant risk factors of cardiovascular diseases.

scholarly journals Health Benefits of Resveratrol in Kidney Disease: Evidence from In Vitro and In Vivo Studies

Nutrients ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1624 ◽  
Author(s):  
Danja J. Den Hartogh ◽  
Evangelia Tsiani
Keyword(s):  
Kidney Disease ◽  
Renal Cancer ◽  
Fruits And Vegetables ◽  
Health Benefits ◽  
Epidemiological Studies ◽  
In Vivo Studies ◽  
Disease Treatment ◽  
Anti Cancer

Different diseases and disorders that affect the kidneys include, but are not limited to, glomerulonephritis, diabetic nephropathy, polycystic kidney disease, kidney stones, renal fibrosis, sepsis, and renal cell carcinoma. Kidney disease tends to develop over many years, making it difficult to identify until much later when kidney function is severely impaired and undergoing kidney failure. Although conservative care, symptom management, medication, dialysis, transplantation, and aggressive renal cancer therapy are some of the current strategies/approaches to kidney disease treatment, new preventative targeted therapies are needed. Epidemiological studies have suggested that a diet rich in fruits and vegetables is associated with health benefits including protection against kidney disease and renal cancer. Resveratrol, a polyphenol found in grapes and berries, has been reported to have antioxidant, anti-inflammatory, antidiabetic, hepatoprotective, neuroprotective, and anti-cancer properties. The current review summarizes the existing in vitro and in vivo animal and human studies examining the nephroprotective effects of resveratrol.

scholarly journals Intestinal absorption of epoxy-β-carotenes by humans

1999 ◽  
Vol 339 (2) ◽  
pp. 359-362 ◽  
Author(s):  
Arun B. BARUA
Keyword(s):  
Lung Cancer ◽  
High Risk ◽  
Fruits And Vegetables ◽  
Risk Groups ◽  
Epidemiological Studies ◽  
Protective Effects ◽  
Induction Of Differentiation ◽  
Risk Of Cancer ◽  
Β Carotene ◽  
Reduced Risk

An increased intake of fruits and vegetables has been shown to be associated with reduced risk of cancer. In epidemiological studies, supplements of β-carotene, which is abundant in fruits and vegetables, were not found to be beneficial in reducing the incidence of lung cancer in high-risk groups. Epoxycarotenoids are abundant in nature. 5,6-Epoxy-β-carotene was much more active than β-carotene in the induction of differentiation of NB4 cells [Duitsman, Becker, Barua and Olson (1996) FASEB J. 10, A732]. Epoxycarotenes may, therefore, have protective effects against cancer. In order to do this, however, epoxycarotenoids must be absorbed by the human body. There is no evidence that epoxycarotenoids, despite their abundance in dietary fruits and vegetables, are absorbed by humans. In this paper, it is demonstrated that orally administered dietary or synthetic epoxy-β-carotenes are absorbed by humans, as indicated by their appearance in the circulating blood.

Do mycoplasmas cause human cancer?

2001 ◽  
Vol 47 (8) ◽  
pp. 691-697 ◽  
Author(s):  
Nevio Cimolai
Keyword(s):  
Tissue Culture ◽  
Molecular Mechanisms ◽  
Human Cancer ◽  
Epidemiological Studies ◽  
Respiratory Pathogen ◽  
The Novel ◽  
The 1960S ◽  
In Vitro Data

A linkage between mycoplasmas and malignancy was mainly proposed in the 1960s when human-associated mycoplasmas were becoming of interest given the novel characterization of the human respiratory pathogen Mycoplasma pneumoniae. Associations with leukemia and other malignancies, however, were largely ascribed to tissue-culture contamination, which is now recognized as a significant potential problem in molecular biology circles. A few epidemiological studies, however, continue to raise concern over such a linkage. As well, in vitro data have demonstrated the potential for some mycoplasmas to induce karyotypic changes and malignant transformation during chronic tissue-culture infestation. As cellular and molecular mechanisms for such transformation become studied, a resurgence of interest in this area is inevitable. A role for mycoplasmas in malignancy of any sort is conjectural, but there remains a need to continue with focussed epidemiological and laboratory investigations.Key words: mycoplasma, cancer, oncogenesis, leukemia.

scholarly journals Dietary patterns and risk of asthma: results from three countries in European Community Respiratory Health Survey-II

2009 ◽  
Vol 103 (9) ◽  
pp. 1354-1365 ◽  
Author(s):  
Richard Hooper ◽  
Joachim Heinrich ◽  
Ernst Omenaas ◽  
Stefanie Sausenthaler ◽  
Vanessa Garcia-Larsen ◽  
...  
Keyword(s):  
Symptom Score ◽  
Dietary Patterns ◽  
Fruits And Vegetables ◽  
Regression Coefficient ◽  
Respiratory Health ◽  
Positive Association ◽  
Epidemiological Studies ◽  
Protective Effects ◽  
Bronchial Responsiveness ◽  
The Uk

Dietary patterns offer an alternative to the analysis of individual foods or nutrients in nutritional epidemiological studies. The aim of the present study was to identify dietary patterns common to different European countries and examine their associations with asthma. In five study centres (two in Germany, two in the UK and one in Norway), 1174 adults aged 29–55 years completed a FFQ and respiratory symptoms questionnaire. A meta-analytic approach was used to identify the dietary patterns and analyse them in relation to current asthma, asthma symptoms and bronchial responsiveness (BHR). Two patterns emerged, generally correlating with the same foods at different centres: one associated with intake of meats and potatoes; the other with fish, fruits and vegetables. There was no evidence that the fish, fruits and vegetables pattern was associated with asthma (OR 1·11 (95 % CI 0·93, 1·33)), symptom score (ratio of means 1·07 (0·98, 1·17)) or BHR (regression coefficient − 0·01 ( − 0·12, 0·10)), though these CI appeared to rule out large protective effects of consuming these foods. There was no overall evidence that the meat and potato pattern was associated with asthma (OR 1·02 (0·79, 1·31)), symptom score (ratio of means 1·07 (0·84, 1·36)) or BHR (regression coefficient − 0·08 ( − 0·27, 0·10)), but there was heterogeneity between centres in the association with symptom score: a negative association at the two German centres; a positive association at the others. Heterogeneity in a multi-centre observational study of diet could suggest alternative explanations for apparent effects of diet, such as uncontrolled confounding.

scholarly journals Onco-Preventive and Chemo-Protective Effects of Apple Bioactive Compounds

Nutrients ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 4025
Author(s):  
Linda Nezbedova ◽  
Tony McGhie ◽  
Mark Christensen ◽  
Julian Heyes ◽  
Noha Ahmed Nasef ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Causes Of Death ◽  
Epidemiological Studies ◽  
In Vivo Studies ◽  
Protective Effects ◽  
Plant Metabolites ◽  
Hallmarks Of Cancer ◽  
Secondary Plant Metabolites

Cancer is one of the leading causes of death globally. Epidemiological studies have strongly linked a diet high in fruits to a lower incidence of cancer. Furthermore, extensive research shows that secondary plant metabolites known as phytochemicals, which are commonly found in fruits, have onco-preventive and chemo-protective effects. Apple is a commonly consumed fruit worldwide that is available all year round and is a rich source of phytochemicals. In this review, we summarize the association of apple consumption with cancer incidence based on findings from epidemiological and cohort studies. We further provide a comprehensive review of the main phytochemical patterns observed in apples and their bioavailability after consumption. Finally, we report on the latest findings from in vitro and in vivo studies highlighting some of the key molecular mechanisms targeted by apple phytochemicals in relation to inhibiting multiple ‘hallmarks of cancer’ that are important in the progression of cancer.

scholarly journals Anthocyanins: From Mechanisms of Regulation in Plants to Health Benefits in Foods

2021 ◽  
Vol 12 ◽  
Author(s):  
Francesca Cappellini ◽  
Alessandra Marinelli ◽  
Marta Toccaceli ◽  
Chiara Tonelli ◽  
Katia Petroni
Keyword(s):  
Chronic Diseases ◽  
Plant Species ◽  
Translational Regulation ◽  
Molecular Mechanisms ◽  
Anthocyanin Biosynthesis ◽  
Biological Activities ◽  
Health Benefits ◽  
Protective Effects ◽  
Human Diet ◽  
Important Health

Anthocyanins represent the major red, purple, and blue pigments in many flowers, fruits, vegetables, and cereals. They are also recognized as important health-promoting components in the human diet with protective effects against many chronic diseases, including cardiovascular diseases, obesity, and cancer. Anthocyanin biosynthesis has been studied extensively, and both biosynthetic and key regulatory genes have been isolated in many plant species. Here, we will provide an overview of recent progress in understanding the anthocyanin biosynthetic pathway in plants, focusing on the transcription factors controlling activation or repression of anthocyanin accumulation in cereals and fruits of different plant species, with special emphasis on the differences in molecular mechanisms between monocot and dicot plants. Recently, new insight into the transcriptional regulation of the anthocyanin biosynthesis, including positive and negative feedback control as well as epigenetic and post-translational regulation of MYB-bHLH-WD40 complexes, has been gained. We will consider how knowledge of regulatory mechanisms has helped to produce anthocyanin-enriched foods through conventional breeding and metabolic engineering. Additionally, we will briefly discuss the biological activities of anthocyanins as components of the human diet and recent findings demonstrating the important health benefits of anthocyanin-rich foods against chronic diseases.

scholarly journals Fruit and vegetable intake and risk of CHD: results from prospective cohort studies of Chinese adults in Shanghai

2013 ◽  
Vol 111 (2) ◽  
pp. 353-362 ◽  
Author(s):  
Danxia Yu ◽  
Xianglan Zhang ◽  
Yu-Tang Gao ◽  
Honglan Li ◽  
Gong Yang ◽  
...  
Keyword(s):  
Fruits And Vegetables ◽  
Vegetable Intake ◽  
Chinese Women ◽  
Epidemiological Studies ◽  
Fruit And Vegetable Intake ◽  
Protective Effects ◽  
Fruit And Vegetable ◽  
Asian Populations ◽  
Chd Risk ◽  
Coronary Events

The protective effects of fruits and vegetables against CHD have been suggested by many epidemiological studies among Western populations. However, prospective data are lacking for Asian populations. In the present study, we examined the associations of fruit and vegetable intake with CHD incidence among 67 211 women (aged 40–70 years) and 55 474 men (aged 40–74 years) living in Shanghai, China. Food intake was assessed using validated FFQ through in-person interviews. Coronary events (non-fatal myocardial infarction or fatal CHD) were identified by biennial home visits and further confirmed by medical record review. During a mean follow-up period of 9·8 and 5·4 years, 148 events in women and 217 events in men were documented and verified. After adjustment for potential confounders, women in the highest quartile of total fruit and vegetable intake (median 814 g/d) had a hazard ratio (HR) of 0·62 (95 % CI 0·38, 1·02) for CHD (Pfor trend = 0·04) compared with those in the lowest quartile (median 274 g/d). This association was primarily driven by fruits (HR for the highestv.the lowest intake in women: 0·62, 95 % CI 0·37, 1·03). The strength of the association was attenuated after further controlling for history of diabetes or hypertension. For men, no significant association was found for fruit and vegetable intake when analysed either in combination or individually. The present findings suggest that a high consumption of fruits may reduce CHD risk in Chinese women.

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