Evaluation of antioxidant properties of major dietary polyphenols and their protective effect on 3T3-L1 preadipocytes and red blood cells exposed to oxidative stress

2014 ◽  
Vol 48 (4) ◽  
pp. 387-401 ◽  
Author(s):  
S. Hatia ◽  
A. Septembre-Malaterre ◽  
F. Le Sage ◽  
A. Badiou-Bénéteau ◽  
P. Baret ◽  
...  
Blood ◽  
1999 ◽  
Vol 93 (11) ◽  
pp. 4006-4010 ◽  
Author(s):  
Kazutetsu Aoshiba ◽  
Yuri Nakajima ◽  
Shuji Yasui ◽  
Jun Tamaoki ◽  
Atsushi Nagai

Abstract Oxidative stress has been implicated in the triggering of apoptosis in neutrophils. Because red blood cells (RBCs) are well known to scavenge oxidants including H2O2, we tested the hypothesis that RBCs inhibit apoptosis of neutrophils by reducing intracellular oxidative stress. Apoptosis of neutrophils was evaluated by light microscopy and DNA gel electrophoresis. We found that coculture with RBCs protected against neutrophil apoptosis. Neither physical contact between RBCs and neutrophils nor the cellular integrity of RBCs was required to protect against neutrophil apoptosis. Neutrophil apoptosis was promoted by exogenous H2O2 but suppressed by catalase, indicating a role for H2O2 as a mediator of apoptosis. The protective effect of RBCs against apoptosis was due to catalase and glutathione metabolism because blocking of these antioxidant systems in RBCs attenuated the protective effect of RBCs. These results suggest that neutrophils are protected against apoptosis in the circulation.


Antioxidants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 220 ◽  
Author(s):  
Fabiana Tortora ◽  
Rosaria Notariale ◽  
Viviana Maresca ◽  
Katrina Vanessa Good ◽  
Sergio Sorbo ◽  
...  

Plant polyphenols, with broadly known antioxidant properties, represent very effective agents against environmental oxidative stressors, including mercury. This heavy metal irreversibly binds thiol groups, sequestering endogenous antioxidants, such as glutathione. Increased incidence of food-derived mercury is cause for concern, given the many severe downstream effects, ranging from kidney to cardiovascular diseases. Therefore, the possible beneficial properties of Feijoa sellowiana against mercury toxicity were tested using intact human red blood cells (RBC) incubated in the presence of HgCl2. Here, we show that phenol-rich (10–200 µg/mL) extracts from the Feijoa sellowiana fruit potently protect against mercury-induced toxicity and oxidative stress. Peel and pulp extracts are both able to counteract the oxidative stress and thiol decrease induced in RBC by mercury treatment. Nonetheless, the peel extract had a greater protective effect compared to the pulp, although to a different extent for the different markers analyzed, which is at least partially due to the greater proportion and diversity of polyphenols in the peel. Furthermore, Fejioa sellowiana extracts also prevent mercury-induced morphological changes, which are known to enhance the pro-coagulant activity of these cells. These novel findings provide biochemical bases for the pharmacological use of Fejioa sellowiana-based functional foods in preventing and combating mercury-related illnesses.


Blood ◽  
1999 ◽  
Vol 93 (11) ◽  
pp. 4006-4010 ◽  
Author(s):  
Kazutetsu Aoshiba ◽  
Yuri Nakajima ◽  
Shuji Yasui ◽  
Jun Tamaoki ◽  
Atsushi Nagai

Oxidative stress has been implicated in the triggering of apoptosis in neutrophils. Because red blood cells (RBCs) are well known to scavenge oxidants including H2O2, we tested the hypothesis that RBCs inhibit apoptosis of neutrophils by reducing intracellular oxidative stress. Apoptosis of neutrophils was evaluated by light microscopy and DNA gel electrophoresis. We found that coculture with RBCs protected against neutrophil apoptosis. Neither physical contact between RBCs and neutrophils nor the cellular integrity of RBCs was required to protect against neutrophil apoptosis. Neutrophil apoptosis was promoted by exogenous H2O2 but suppressed by catalase, indicating a role for H2O2 as a mediator of apoptosis. The protective effect of RBCs against apoptosis was due to catalase and glutathione metabolism because blocking of these antioxidant systems in RBCs attenuated the protective effect of RBCs. These results suggest that neutrophils are protected against apoptosis in the circulation.


Author(s):  
Т.П. Ветлугина ◽  
В.Д. Прокопьева ◽  
Е.В. Плотников ◽  
Е.Г. Ярыгина ◽  
В.Ф. Лебедева ◽  
...  

Введение. Нарушения параметров красной крови при алкоголизме, развитие окислительного стресса с увеличением продуктов окислительной модификации биомолекул обусловливают актуальность поиска защитных средств эритроцитов от токсического воздействия этанола. Перспективными для такого поиска могут быть соли лития, учитывая применение препаратов лития в качестве нормотимиков для лечения расстройств аффективного спектра. Цель исследования - изучение показателей красной крови, факторов окислительного стресса у больных алкоголизмом и оценка защитного потенциала солей лития (аскорбата, сукцината, пирувата, фумарата и карбоната) от токсического действия этанола на эритроциты. Методика. Материалом для исследования служили образцы крови 59 мужчин больных алкоголизмом и 38 здоровых мужчин (контроль). Гематологический анализ крови осуществляли на гематологическом анализаторе Micros 60. В плазме крови определяли показатели окислительного повреждения белков (по уровню карбонилированных белков) и перекисного окисления липидов (по уровню ТБК-реактивных продуктов) спектрофотометрическим методом. Мембранопротекторный эффект солей лития оценивали в опытах in vitro по степени гемолиза эритроцитов при действии этанола в присутствии солей лития в концентрации 1,2 ммоль/л в расчете на ион лития. Результаты. У больных алкоголизмом установлено повышение среднего объема эритроцитов (MCV) и снижение параметров остальных показателей красной крови. Концентрации карбонилированных белков и ТБК-реактивных продуктов в плазме крови пациентов превышали контрольные значения. Соли лития (фумарат, пируват и аскорбат) в 1,5-1,7 раз повышали устойчивость эритроцитов к гемолизу, индуцированному этанолом. Карбонат лития такого эффекта не оказывал. Заключение. У больных алкоголизмом обнаружены существенные повреждения эритроцитов и макромолекул плазмы крови. Фумарат, пируват и аскорбат лития демонстрировали высокий мембранопротекторный эффект, повышая устойчивость эритроцитов к токсическому действию этанола. Данные соли лития расширяют арсенал мембранопротекторных соединений, что в сочетании с нормотимическим действием лития позволяет использовать их для разработки импортозамещающих лекарственных средств лечения расстройств аффективного спектра. Introduction. In alcoholism, red blood variables are altered, and oxidative stress, along with an increase in the oxidative modification of biomolecules products, occurs. These effects have stimulated the search for agents to protect red blood cells against the toxic effects of ethanol. Lithium salts may be promising in this regard, since lithium preparations are used as normothymics for treating affective spectrum disorders. The aim of this study was to investigate red blood indexes, factors of oxidative stress in patients with alcoholism and to assess the protective potential of the lithium salts, ascorbate, succinate, pyruvate, fumarate and carbonate, against the toxic effect of ethanol on red blood cells. Methods. Blood samples were collected from 59 alcoholic men and 38 healthy men. Hematological analysis was performed with a Micros 60 hematological analyzer. In plasma, oxidative damage of proteins was determined by the amount of carbonylated proteins (CP), and lipid peroxidation was determined by the amount of TBA-reactive substances (TBARS), as measured spectrophotometrically. The membrane-protective effect of lithium salts was evaluated in vitro by the degree of hemolysis of red blood cells treated with ethanol in the presence of lithium salts at a concentration of 1.2 mmol/l lithium ion. Results. In alcoholic patients, compared with normal patients, an increase in the mean corpuscular volume (MCV) and a decrease in all other red cell variables were found. Concentrations of CP and TBARS in plasma exceeded normal values. The lithium salts, fumarate, pyruvate, and ascorbate, elevated the resistance of red blood cells to ethanol-induced hemolysis by 1.5-1.7 times. Lithium carbonate had no effect. Conclusion. Significant damage to red blood cells and plasma macromolecules was found in alcoholic patients. Lithium fumarate, pyruvate and ascorbate had a large membrane-protective effect. Thus, these salts increased the resistance of red blood cells to the toxic effects of ethanol. These salts expand the arsenal of membrane-protective compounds, which in combination with the normothymic effect of lithium, will allow them to be used in developing drugs for treatment of affective spectrum disorders.


Drug Research ◽  
2020 ◽  
Author(s):  
Tina Didari ◽  
Shokoufeh Hassani ◽  
Maryam Baeeri ◽  
Mona Navaei-Nigjeh ◽  
Mahban Rahimifard ◽  
...  

Abstract Aim of the study Sepsis has well-documented inflammatory effects on cardiovascular and blood cells. This study is designed to investigate potential anti-inflammatory effects of metformin on cardiac and blood cells 12 and 24 h following cecal ligation and puncture (CLP)-induced sepsis. Methods For the purpose of this study, 36 male Wistar rats were divided into six groups: two groups underwent CLP, two groups underwent CLP and received metformin, and two groups only received sham operations. 12 h later, 18 rats (half of rats in each of the three aforementioned groups) were sacrificed and cardiac and blood cells were harvested. Subsequently, 12 h later, the rest of the rats were euthanatized. In all harvested blood and cardiac cells, oxidative stress indicators, antioxidant properties, count of blood cells, neutrophil infiltration, percentage of weight loss and pathological assessment were conducted. Results In our experiment, metformin elevated antioxidant levels, improved function of blood cells and percentage of weight loss. Moreover, in the groups which received metformin, oxidative stress and neutrophil infiltration markers were decreased significantly. Moreover, pathological investigations of cardiac cell injury were reduced in the metformin group. Conclusions Our findings suggest that in CLP induced sepsis model, metformin can improve the function of blood and cardiac cells through alleviating inflammation, improvement of anti-inflammation properties, and enhancement of blood profile, and all these effects are more pronounced after 24 h in comparison with 12 h after induction of sepsis.


2002 ◽  
Vol 368 (3) ◽  
pp. 761-768 ◽  
Author(s):  
Svenja MEIERJOHANN ◽  
Rolf D. WALTER ◽  
Sylke MÜLLER

Malaria is one of the most devastating tropical diseases despite the availability of numerous drugs acting against the protozoan parasite Plasmodium in its human host. However, the development of drug resistance renders most of the existing drugs useless. In the malaria parasite the tripeptide glutathione is not only involved in maintaining an adequate intracellular redox environment and protecting the cell against oxidative stress, but it has also been shown that it degrades non-polymerized ferriprotoporphyrin IX (FP IX) and is thus implicated in the development of chloroquine resistance. Glutathione levels in Plasmodium-infected red blood cells are regulated by glutathione synthesis, glutathione reduction and glutathione efflux. Therefore the effects of drugs that interfere with these metabolic processes were studied to establish possible differences in the regulation of the glutathione metabolism of a chloroquine-sensitive and a chloroquine-resistant strain of Plasmodiumfalciparum. Growth inhibition of P. falciparum 3D7 by d,l-buthionine-(S,R)sulphoximine (BSO), an inhibitor of γ-glutamylcysteine synthetase (γ-GCS), and by Methylene Blue (MB), an inhibitor of gluta thione reductase (GR), was significantly more pronounced than inhibition of P.falciparum Dd2 growth by these drugs. These results correlate with the higher levels of total glutathione in P. falciparum Dd2. Short-term incubations of Percoll-enriched trophozoite-infected red blood cells in the presence of BSO, MB and N,N1-bis(2-chloroethyl)-N-nitrosourea and subsequent determinations of γ-GCS activities, GR activities and glutathione disulphide efflux revealed that maintenance of intracellular glutathione in P. falciparum Dd2 is mainly dependent on glutathione synthesis whereas in P. falciparum 3D7 it is regulated via GR. Generally, P. falciparum Dd2 appears to be able to sustain its intracellular glutathione more efficiently than P. falciparum 3D7. In agreement with these findings is the differential susceptibility to oxidative stress of both parasite strains elicited by the glucose/glucose oxidase system.


Author(s):  
Rodney C. Daniels ◽  
Hyesun Jun ◽  
Robertson D. Davenport ◽  
Maryanne M. Collinson ◽  
Kevin R. Ward

2016 ◽  
Vol 48 ◽  
pp. 253-264 ◽  
Author(s):  
Pamela Soledad Bustos ◽  
Romina Deza-Ponzio ◽  
Paulina Laura Páez ◽  
Ines Albesa ◽  
José Luis Cabrera ◽  
...  

2018 ◽  
Vol 52 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Sema Misir ◽  
Yuksel Aliyazicioglu ◽  
Selim Demir ◽  
Ibrahim Turan ◽  
Serap Ozer Yaman ◽  
...  

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