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Polyphenols mitochondria

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https://www.readbyqxmd.com/read/29750172/proanthocyanidins-against-oxidative-stress-from-molecular-mechanisms-to-clinical-applications
#1
REVIEW
Lingyu Yang, Dehai Xian, Xia Xiong, Rui Lai, Jing Song, Jianqiao Zhong
Proanthocyanidins (PCs) are naturally occurring polyphenolic compounds abundant in many vegetables, plant skins (rind/bark), seeds, flowers, fruits, and nuts. Numerous in vitro and in vivo studies have demonstrated myriad effects potentially beneficial to human health, such as antioxidation, anti-inflammation, immunomodulation, DNA repair, and antitumor activity. Accumulation of prooxidants such as reactive oxygen species (ROS) exceeding cellular antioxidant capacity results in oxidative stress (OS), which can damage macromolecules (DNA, lipids, and proteins), organelles (membranes and mitochondria), and whole tissues...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29726706/-i-hibiscus-sabdariffa-i-roselle-polyphenol-rich-extract-averts-cardiac-functional-and-structural-abnormalities-in-type-1-diabetic-rats
#2
Nur Liyana Mohammed Yusof, Satirah Zainalabidin, Norsyahida Mohd Fauzi, Siti Balkis Budin
Diabetes mellitus is often associated with cardiac functional and structural alteration, an initial event leading to cardiovascular complications. <i>Hibiscus sabdariffa</i> or roselle has been widely proven as an antioxidant and recently has incited research interest for its potential in treating cardiovascular disease. Therefore, this study aimed to determine the cardioprotective effects of <i>H. sabdariffa </i>(roselle) polyphenol-rich extract (HPE) in type-1 induced diabetic rats...
May 4, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29723631/paraptosis-in-human-glioblastoma-cell-line-induced-by-curcumin
#3
Monika Garrido-Armas, Juan Carlos Corona, Maria Luisa Escobar, Leda Torres, Francisco Ordóñez-Romero, Abrahan Hernández-Hernández, Francisco Arenas-Huertero
Curcumin is a polyphenol compound extracted from Curcuma longa plant, is a molecule with pleiotropic effects that suppresses transformation, proliferation and metastasis of malignant tumors. Curcumin can cause different kinds of cell death depending of its concentration on the exposed cell type. Here we show that exposure of the glioblastoma cell line A172 to curcumin at 50 μM, the IC50, causes morphological changes characteristic of paraptosis cell-death. Vesicles derived from the ER and low membrane potential of the mitochondria were constantly found in the exposed cells...
April 30, 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29675133/benefit-of-oleuropein-aglycone-for-alzheimer-s-disease-by-promoting-autophagy
#4
REVIEW
Joaquín G Cordero, Ramón García-Escudero, Jesús Avila, Ricardo Gargini, Vega García-Escudero
Alzheimer's disease is a proteinopathy characterized by accumulation of hyperphosphorylated Tau and β -amyloid. Autophagy is a physiological process by which aggregated proteins and damaged organelles are eliminated through lysosomal digestion. Autophagy deficiency has been demonstrated in Alzheimer's patients impairing effective elimination of aggregates and damaged mitochondria, leading to their accumulation, increasing their toxicity and oxidative stress. In the present study, we demonstrated by microarray analysis the downregulation of fundamental autophagy and mitophagy pathways in Alzheimer's patients...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29674276/protective-effects-of-radish-raphanus-sativus-l-leaves-extract-against-hydrogen-peroxide-induced-oxidative-damage-in-human-fetal-lung-fibroblast-mrc-5-cells
#5
Xiaoping Luo, Haihui Zhang, Yuqing Duan, Guangying Chen
Natural antioxidants play a critical role in the promotion of good health for its prevention of oxidative stress. The main purpose of this study is to investigate the protective effects of radish leaves extract on the oxidative damage in human fetal lung fibroblast (MRC-5) cells. F2, a fraction of radish leaves extracts, which was fractionated by different polarity solvents and AB-8 macroporous resins column shows the best free radical scavenging ability, the highest total polyphenol contents (TPC), and the most potent protective effects on H2 O2 -induced oxidative damage in MRC-5 cells...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29674247/apple-peel-polyphenols-reduce-mitochondrial-dysfunction-in-mice-with-dss-induced-ulcerative-colitis
#6
Pantea Rahmani Yeganeh, Jade Leahy, Schohraya Spahis, Natalie Patey, Yves Desjardins, Denis Roy, Edgard Delvin, Carole Garofalo, Jean-Philippe Leduc-Gaudet, David St-Pierre, Jean-François Beaulieu, André Marette, Gilles Gouspillou, Emile Levy
Inflammatory bowel diseases (IBDs) are multifaceted and relapsing immune disorders, which necessitate long-term dependence on powerful drugs. As the use of natural product-based therapies has emerged as a promising intervention, the present study aimed to further characterize dried apple peel powder (DAPP) mechanisms of action and evaluate the preventive and curative effects of DAPP on mitochondrial functions in a murine model. Induction of intestinal inflammation in mice is performed by oral administration of the dextran sodium sulfate (DSS) at 2...
March 21, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29671630/the-critical-role-of-epigallocatechin-gallate-in-regulating-mitochondrial-metabolism
#7
Weimei Shi, Linfu Li, Yechun Ding, Kai Yang, Zhixi Chen, Xiaona Fan, Shan Jiang, Yingjie Guan, Zhiping Liu, Daohua Xu, Longhuo Wu
Epigallocatechin gallate (EGCG), one of polyphenols isolated from green tea, exhibits biology-benefiting effects with minimum severe adverse. EGCG is known to be a mitochondrion-targeting medicinal agent, regulating mitochondrial metabolism, including mitochondrial biogenesis, mitochondrial bioenergetics, and mitochondria-mediated cell cycle and apoptosis. EGCG might exhibit either antioxidative activity to prevent against oxidative stress or pro-oxidative activity to counteract cancer cells, which depends on the cellular stress situations, cell types and the concentration of EGCG...
April 19, 2018: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29599473/epigallocatechin-3-gallate-alleviates-bladder-overactivity-in-a-rat-model-with-metabolic-syndrome-and-ovarian-hormone-deficiency-through-mitochondria-apoptosis-pathways
#8
Yi-Lun Lee, Kun-Ling Lin, Bin-Nan Wu, Shu-Mien Chuang, Wen-Jeng Wu, Yung-Chin Lee, Wan-Ting Ho, Yung-Shun Juan
Metabolic syndrome (MetS) and ovarian hormone deficiency could affect bladder storage dysfunction. Epigallocatechin-3-gallate (EGCG), a polyphenolic compound in green tea, has been shown to protect against ovarian hormone deficiency induced overactive bladder (OAB). The present study investigated oxidative stress induced by MetS and bilateral ovariectomy (OVX), and elucidated the mechanism underlying the protective effect of EGCG (10 umol/kg/day) on bladder overactivity. Rats were fed with high fat high sugar (HFHS) diet to induce MetS and received ovariectomy surgery to deprive ovarian hormone...
March 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29547561/targeting-mitochondria-to-counteract-age-related-cellular-dysfunction
#9
REVIEW
Corina T Madreiter-Sokolowski, Armin A Sokolowski, Markus Waldeck-Weiermair, Roland Malli, Wolfgang F Graier
Senescence is related to the loss of cellular homeostasis and functions, which leads to a progressive decline in physiological ability and to aging-associated diseases. Since mitochondria are essential to energy supply, cell differentiation, cell cycle control, intracellular signaling and Ca2+ sequestration, fine-tuning mitochondrial activity appropriately, is a tightrope walk during aging. For instance, the mitochondrial oxidative phosphorylation (OXPHOS) ensures a supply of adenosine triphosphate (ATP), but is also the main source of potentially harmful levels of reactive oxygen species (ROS)...
March 16, 2018: Genes
https://www.readbyqxmd.com/read/29454114/mitochondria-targeting-mitochondrial-reactive-oxygen-species-with-mitochondriotropic-polyphenolic-based-antioxidants
#10
José Teixeira, Cláudia M Deus, Fernanda Borges, Paulo J Oliveira
Mitochondrial function and regulation of redox balance is fundamental in controlling cellular life and death pathways. Antioxidants have been used to counteract disruption of redox networks, normally associated with progressive loss of cell homeostasis and disease pathophysiology, although therapeutic success is limited mainly due to pharmacokinetic drawbacks. Attempts to improve mitochondrial function in a range of diseases spurred active drug discovery efforts. Currently, the most effective strategy to deliver drugs to mitochondria is the covalent link of lipophilic cations to the bioactive compound...
April 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29427088/effect-of-resveratrol-on-oxidative-stress-and-mitochondrial-dysfunction-in-immature-brain-during-epileptogenesis
#11
Jaroslava Folbergrová, Pavel Ješina, Hana Kubová, Jakub Otáhal
The presence of oxidative stress in immature brain has been demonstrated during the acute phase of status epilepticus (SE). The knowledge regarding the long periods of survival after SE is not unequivocal, lacking direct evidence. To examine the presence and time profile of oxidative stress, its functional effect on mitochondria and the influence of an antioxidant treatment in immature rats during epileptogenesis, status epilepticus (SE) was induced in immature 12-day-old rats by Li-pilocarpine and at selected periods of the epileptogenesis; rat pups were subjected to examinations...
February 9, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29412913/ros-driven-and-preferential-killing-of-hepg2-over-l-02-cells-by-a-short-term-cooperation-of-cu-ii-and-a-catechol-type-resveratrol-analog
#12
Fang Dai, Qi Wang, Gui-Juan Fan, Yu-Ting Du, Bo Zhou
This study was aimed at understanding why dietary polyphenols with a catechol skeleton tend to exhibit cancer chemopreventive activity by using a catechol-type stilbene (3,4-DHS) as a model molecule. Only a short-term cooperation of 3,4-DHS and exogenous Cu(II) exhibited a strong preferential ability to kill HepG2 cells over normal L02 cells. Mechanism studies reveal that this 3,4-DHS/Cu(II) system could produce extracellularly reactive oxygen species (ROS) and o-quinone through two sequential proton loss electron transfer followed by diffusion of ROS into cells, leading to higher intracellular accumulation of ROS, preferential disruption of redox homeostasis and more effective mitochondria-dependent apoptosis as well as necrosis of HepG2 cells than L-02 cells...
June 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29373904/eupatorin-and-salvigenin-potentiate-doxorubicin-induced-apoptosis-and-cell-cycle-arrest-in-ht-29-and-sw948-human-colon-cancer-cells
#13
Nazanin Namazi Sarvestani, Houri Sepehri, Ladan Delphi, Mahdi Moridi Farimani
Background: Cancer persists as one of the world’s most pressing maladies. Notable points about chemotherapy are drug side effects which are almost universally encountered. Emerging knowledge focusing on mechanisms of toxicity due to chemotherapy has led to characterization of novel methods, including the exploitation of natural compounds, in combination therapies. Flavonoids are natural polyphenolic compounds that play protective roles against tumor cell development. The focus of this study was apoptotic effects of two flavonoids, eupatorin and salvigenin, in combination with doxorubicin on a cellular model of colon cancer...
January 27, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29316691/a-comparative-study-on-phytochemical-profiles-and-biological-activities-of-sclerocarya-birrea-a-rich-hochst-leaf-and-bark-extracts
#14
Daniela Russo, Rocchina Miglionico, Monica Carmosino, Faustino Bisaccia, Paula B Andrade, Patrícia Valentão, Luigi Milella, Maria Francesca Armentano
Sclerocarya birrea (A.Rich.) Hochst (Anacardiaceae) is a savannah tree that has long been used in sub-Saharan Africa as a medicinal remedy for numerous ailments. The purpose of this study was to increase the scientific knowledge about this plant by evaluating the total content of polyphenols, flavonoids, and tannins in the methanol extracts of the leaves and bark (MLE and MBE, respectively), as well as the in vitro antioxidant activity and biological activities of these extracts. Reported results show that MLE is rich in flavonoids (132...
January 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29278807/myricetin-enhances-on-apoptosis-induced-by-serum-deprivation-in-pc12-cells-mediated-by-mitochondrial-signaling-pathway
#15
Gongxun Tan, Rachael A Uson-Lopez, Md Mostafizur Rahman, Toshiyuki Hosokawa, Takeshi Saito, Masaaki Kurasaki
Polyphenols have many beneficial effects and an effective disease therapeutic auxiliary drug. Previously, myricetin, a polyphenol, had been reported to possess various biological effects on human physiology. However, mechanism of myricetin on apoptosis induced in PC12 cells is still unclear. PC12 cells were treated with myricetin in two concentration levels comprising 0.1 and 1 μM under serum-free condition. As a result, morphological changes were observed using trypan blue assay. DNA fragmentation was determined by DNA ladder assay to evaluate DNA damage levels...
January 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29161179/synergistic-induction-of-apoptosis-by-quercetin-and-curcumin-in-chronic-myeloid-leukemia-k562-cells
#16
Ergül Mutlu Altundağ, Ayşe Mine Yılmaz, Semra Koçtürk, Yavuz Taga, A Suha Yalçın
Chronic myeloid leukemia is a major hematopoietic malignancy characterized by expansion of myeloid cells. In this study, we have investigated whether quercetin, curcumin and their combination induce apoptosis and inhibit growth of K562 cells. We have observed that quercetin and curcumin combination induced apoptosis accompanied by increased ROS and decreased GSH levels as well as loss of mitochondrial membrane potential. Our mRNA and protein expression results suggested that cytochrome c was released from mitochondria causing PARP and caspase-9 cleavages, the hallmarks of mitochondrial apoptotic pathway...
January 2018: Nutrition and Cancer
https://www.readbyqxmd.com/read/29137335/inhibition-of-cell-cycle-progression-by-the-hydroxytyrosol-cetuximab-combination-yields-enhanced-chemotherapeutic-efficacy-in-colon-cancer-cells
#17
Erika Terzuoli, Ginevra Nannelli, Maria Frosini, Antonio Giachetti, Marina Ziche, Sandra Donnini
Hydroxytyrosol (HT), a polyphenol of olive oil, downregulates epidermal growth factor (EGFR) expression and inhibits cell proliferation in colon cancer (CC) cells, with mechanisms similar to that activated by the EGFR inhibitor, cetuximab. Here, we studied whether HT treatment would enhance the cetuximab inhibitory effects on cell growth in CC cells. HT-cetuximab combination showed greater efficacy in reducing cell growth in HT-29 and WiDr cells at concentrations 10 times lower than when used as single agents...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29068745/anticancer-activity-and-molecular-mechanism-of-polyphenol-rich-calophyllum-inophyllum-fruit-extract-in-mcf-7-breast-cancer-cells
#18
Shanmugapriya, Yeng Chen, Jagat R Kanwar, Sreenivasan Sasidharan
This study was conducted to investigate the anticancer effects and mechanism of Calophyllum inophyllum fruit extract against MCF-7 cells. C. inophyllum fruit extract was found to have markedly cytotoxic effect against MCF-7 cells in a dose-dependent manner with the IC50 for 24 h of 23.59 µg/mL. Flow cytometry analysis revealed that C. inophyllum fruit extract mediated cell cycle at G0 /G1 and G2 /M phases, and MCF-7 cells entered the early phase of apoptosis. The expression of anti-apoptotic proteins Bcl-2 was decreased whereas the expression of the pro-apoptotic protein Bax, cytochrome C and p53 were increased after treatment...
November 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29065794/prolonged-exposure-of-resveratrol-induces-reactive-superoxide-species-independent-apoptosis-in-murine-prostate-cells
#19
Sanjay Kumar, James Stokes, Udai P Singh, Karyn Scissum-Gunn, Rajesh Singh, Upender Manne, Manoj K Mishra
Nitric oxide, a signaling molecule, inhibits mitochondrial respiration by binding with cytochrome c oxidase, resulting in elevated production of reactive superoxide species (reactive oxygen and nitrogen) in the mitochondria and increased susceptibility to cell death. Generation of mitochondrial superoxide species can be suppressed by natural compounds such as resveratrol, a dietary polyphenol found in the skin of red fruits. In various cancer cells, resveratrol shows anti-oxidant and cancer preventive properties...
October 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/29061316/tea-polyphenols-ameliorates-neural-redox-imbalance-and-mitochondrial-dysfunction-via-mechanisms-linking-the-key-circadian-regular-bmal1
#20
Guoyuan Qi, Yashi Mi, Rong Fan, Beita Zhao, Bo Ren, Xuebo Liu
Circadian rhythms are autonomous anticipatory oscillators that control a large array of physiological and metabolic processes. Compelling evidence points toward an interplay between circadian rhythms and cellular redox metabolism. Dysregulation of circadian rhythms is associated with neurodegenerative diseases and accelerated aging. Tea polyphenols (TP) is one of the most used antioxidants and exerts beneficial effect on neurodegenerative diseases. The aim of this study is to investigate whether circadian clock mechanisms are involved in the protection effect of TP against neural redox imbalance and mitochondrial dysfunction in SH-SY5Y cells...
December 2017: Food and Chemical Toxicology
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