1,721,166 research outputs found
Oxidative stress and Post-stroke depression: Possible therapeutic role of polyphenols?
No full textPost-stroke depression is a common neuropsychiatric affective disorder that may develop after a stroke event. In addition to abnormalities in the biogenic amine neurotransmitters and cytokine expression induced by stroke we will focus on the role of oxidative stress and hypothesize that polyphenols may be useful as therapeutics targets for the treatment of post-stroke depression. In this paper, we discuss the hypothesis that increased oxidative stress in cerebral tissues during ischemia is implicated in the pathogenesis of depressive-like symptoms following stroke. There is substantive evidence regarding the role of oxidative stress in the pathogenesis of both stroke and depression, which provides support to this hypothesis. Reactive oxygen species, generated during stroke, cause oxidative stress, lipid peroxidation, protein oxidation, and DNA damage in neural tissues. The resultant pathophysiological processes in the neural tissues could be considered a leading mechanism in the induction of post-stroke depression. Antioxidants including polyphenols therefore, may play an important role in the outcomes of ischemia and stroke, due to their ability to protect neurons against oxidative stress, to mitigate ischemic damage via inhibition of lipid peroxidation and ability to interact with the generation of nitric oxide from the vascular endothelium, and also to decrease inflammation. These data suggest that polyphenols may therefore be a useful new therapeutic target for the treatment of post-stroke depressio
Oxidative stress and Post-stroke depression: Possible therapeutic role of polyphenols?
No full textPost-stroke depression is a common neuropsychiatric affective disorder that may develop after a stroke event. In addition to abnormalities in the biogenic amine neurotransmitters and cytokine expression induced by stroke we will focus on the role of oxidative stress and hypothesize that polyphenols may be useful as therapeutics targets for the treatment of post-stroke depression. In this paper, we discuss the hypothesis that increased oxidative stress in cerebral tissues during ischemia is implicated in the pathogenesis of depressive-like symptoms following stroke. There is substantive evidence regarding the role of oxidative stress in the pathogenesis of both stroke and depression, which provides support to this hypothesis. Reactive oxygen species, generated during stroke, cause oxidative stress, lipid peroxidation, protein oxidation, and DNA damage in neural tissues. The resultant pathophysiological processes in the neural tissues could be considered a leading mechanism in the induction of post-stroke depression. Antioxidants including polyphenols therefore, may play an important role in the outcomes of ischemia and stroke, due to their ability to protect neurons against oxidative stress, to mitigate ischemic damage via inhibition of lipid peroxidation and ability to interact with the generation of nitric oxide from the vascular endothelium, and also to decrease inflammation. These data suggest that polyphenols may therefore be a useful new therapeutic target for the treatment of post-stroke depressio
Cranberry for urinary tract infection: from bench to bedside
No full textUrinary tract infections are common infectious diseases which can occur in any part of the urinary tract such as bladder, kidney, ureters, and urethra. They are commonly caused by bacteria that enter through the urethra. Urinary tract infections commonly develop in the bladder and spread to renal tissues. Up to now, there are different antimicrobial agents which have beneficial role on the urinary tract infection. However, most of them cause different adverse effects and therefore, much attention has been paid to the search for effective therapeutic agents with negligible adverse effects. Cranberry is known as one of the most important edible plants, which possesses potent antimicrobial effects against the bacteria responsible for urinary tract infections. Growing evidence has shown that cranberry suppresses urinary tract infections and eradicates the bacteria. Therefore, the aim of this study is to critically review the available literature regarding the antimicrobial activities of cranberry against urinary tract infection microorganisms. In addition, we discuss etiology, epidemiology, risk factors, and current drugs of urinary tract infections to provide a more complete picture of this disease
Anti-Oxidative Polyphenolic Compounds of Cocoa
No full textOxidative stress plays a key role in the pathogenesis of different serious chronic diseases such as cancer, diabetes, cardiovascular and neurodegenerative disorders, etc. Recent research has been focused on the beneficial role of dietary antioxidants against oxidative stress both under in vitro and in vivo conditions. Theobroma cacao L. (cacao tree) is an evergreen tree which is native to South America. It is a plant of great economic importance and its seeds are commonly used to produce cocoa powder and chocolate. In addition to its uses in food industry, cocoa is a rich source of polyphenolic antioxidants. There is a plethora of in vitro and in vivo studies that report cocoa antioxidant capacity. The protective activity of cocoa seems to be due to its phytochemical constituents, especially catechins. However, bioavailability of cocoa polyphenolic constituents following oral administration is very low (nanomolar concentrations). In the present paper, we critically reviewed the available literature on the antioxidant and free radical scavenging activities of cocoa and its polyphenolic constituents. In addition to these, we provide brief information about cultivation, phytochemistry, bioavailability and clinical impacts of cocoa
Anti-Oxidative Polyphenolic Compounds of Cocoa
No full textOxidative stress plays a key role in the pathogenesis of different serious chronic diseases such as cancer, diabetes, cardiovascular and neurodegenerative disorders, etc. Recent research has been focused on the beneficial role of dietary antioxidants against oxidative stress both under in vitro and in vivo conditions. Theobroma cacao L. (cacao tree) is an evergreen tree which is native to South America. It is a plant of great economic importance and its seeds are commonly used to produce cocoa powder and chocolate. In addition to its uses in food industry, cocoa is a rich source of polyphenolic antioxidants. There is a plethora of in vitro and in vivo studies that report cocoa antioxidant capacity. The protective activity of cocoa seems to be due to its phytochemical constituents, especially catechins. However, bioavailability of cocoa polyphenolic constituents following oral administration is very low (nanomolar concentrations). In the present paper, we critically reviewed the available literature on the antioxidant and free radical scavenging activities of cocoa and its polyphenolic constituents. In addition to these, we provide brief information about cultivation, phytochemistry, bioavailability and clinical impacts of cocoa
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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