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https://www.readbyqxmd.com/read/29197723/the-flavonoid-quercetin-inhibits-titanium-dioxide-tio2-induced-chronic-arthritis-in-mice
#1
Sergio M Borghi, Sandra S Mizokami, Felipe A Pinho-Ribeiro, Victor Fattori, Jefferson Crespigio, Juliana T Clemente-Napimoga, Marcelo H Napimoga, Dimitrius L Pitol, João P M Issa, Sandra Y Fukada, Rubia Casagrande, Waldiceu A Verri
Titanium dioxide (TiO2) is a common component of orthopedic prosthesis. However, prosthesis wear releases TiO2, which induces inflammation and osteolysis in peri-prosthetic tissues. Quercetin is a flavonoid widely present in human diet, which presents biological activities such as antinociceptive, anti-inflammatory and antioxidant effects. Therefore, the effect of intraperitoneal treatment with quercetin in TiO2-induced arthritis model was evaluated. In the first set of experiments, mice received injection of TiO2 (0...
November 5, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29152632/a-combination-of-quercetin-and-resveratrol-reduces-obesity-in-high-fat-diet-fed-rats-by-modulation-of-gut-microbiota
#2
Le Zhao, Qi Zhang, Weini Ma, Feng Tian, Hongyi Shen, Mingmei Zhou
Resveratrol and quercetin, widely found in foods and vegetables, are plant polyphenols reported to have a wide range of biological activities. Despite their limited bioavailabilities, both resveratrol and quercetin are known to exhibit anti-inflammation and anti-obesity effects. We hypothesized that gut microbiota may be a potential target for resveratrol and quercetin to prevent the development of obesity. The aim of this research was to confirm whether a combination of quercetin and resveratrol (CQR) could restore the gut microbiota dysbiosis induced by a high-fat diet (HFD)...
November 20, 2017: Food & Function
https://www.readbyqxmd.com/read/29149703/quercetin-attenuates-collagen-induced-arthritis-by-restoration-of-th17-treg-balance-and-activation-of-heme-oxygenase-1-mediated-anti-inflammatory-effect
#3
Yan Yang, Xu Zhang, Min Xu, Xin Wu, Feipeng Zhao, Chengzhi Zhao
Quercetin (QU) has been shown obvious anti-arthritic property in pre-clinical studies or clinical studies. Howbeit, the underlying mechanism of it is still not revealed distinctly and should be gotten further insight into. QU at a dosage of 150 mg/kg was administered orally in collagen-induced arthritis rats and then the clinical symptoms were monitored. The protein levels of Th17/Treg-related cytokines were determined by ELISA, and the mRNA levels of cytokines and transcription factors associated with the Th17 and Treg phenotypes were evaluated by real-time PCR, the proportions of Th17 and Treg cells were assessed by flow cytometry...
November 14, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29115568/radical-scavenging-linked-anti-adipogenic-activity-of-alnus-firma-extracts
#4
Sun-Il Choi, Jong Seok Lee, Sarah Lee, Jin-Ha Lee, Hee-Sun Yang, Joohong Yeo, Jong-Yea Kim, Boo-Yong Lee, Il-Jun Kang, Ok-Hwan Lee
The purpose of the present study was to investigate the antioxidant activity and anti-adipogenic effect of extracts from Alnus firma (A. firma), which is an edible plant that grows in mountainous areas. The total phenolic, flavonoid and anthocyanin content as well as the antioxidant activity of a 70% ethanolic extract of A. firma (AFE) was assessed. Furthermore, the effects of AFE on lipid accumulation and reactive oxygen species (ROS) production during adipogenesis of 3T3-L1 cells were investigated. The results revealed that the total phenolic, flavonoid and pro-anthocyanidin content of AFE as 436...
October 27, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29107927/photochemoprotective-effect-of-a-fraction-of-a-partially-purified-extract-of-byrsonima-crassifolia-leaves-against-uvb-induced-oxidative-stress-in-fibroblasts-and-hairless-mice
#5
Rebeca Oliveira de Souza, Geórgia de Assis Dias Alves, Ana Luiza Scarano Aguillera, Hervé Rogez, Maria José Vieira Fonseca
Ultraviolet B (UVB) irradiation increases the risk of various skin disorders, leading to inflammation and oxidative stress and thereby increasing the risk of skin photoaging and carcinogenesis. The use of photochemoprotectors such as natural products with antioxidant and anti-inflammatory properties represents a strategy for preventing UVB-induced skin damage. We investigated the photochemoprotective effect of a fraction of a partially purified extract of Byrsonima crassifolia leaves (BCF) on fibroblasts and hairless mice exposed to UVB radiation...
October 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29056550/piperine-in-combination-with-quercetin-halt-6-ohda-induced-neurodegeneration-in-experimental-rats-biochemical-and-neurochemical-evidences
#6
Shamsher Singh, Puneet Kumar
Parkinson's disease (PD) is a multifactorial neurological disorder caused by selective dopaminergic neuronal loss. Quercetin (QC) in combination with piperine (bioenhancer) acts as potential antioxidant, anti-inflammatory and neuroprotective against 6-OHDA rat model of PD. Rats were injected 6-OHDA (8μg/2μl, saline) unilaterally, intranigrally once into right SNpc. Pre-treatment with QC (25 and 50mg/kg, p.o.) alone and combination of QC (25mg/kg, p.o.) with piperine (2.5mg/kg, p.o.) were given for 14days starting from 8th day of 6-OHDA infusion...
October 19, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/29052001/quail-coturnix-japonica-egg-yolk-bioactive-components-attenuate-streptozotocin-induced-testicular-damage-and-oxidative-stress-in-diabetic-rats
#7
Gideon Oludare Oladipo, Chidinma Martha Nlekerem, Emmanuel Oluwafemi Ibukun, Ayodele Oluseyi Kolawole
INTRODUCTION: The testicular milieu is the machinery for the metabolism of testosterone in the male reproductive system. PURPOSE: The dysfunction of this highly regenerating system is inevitable in the condition of glucose imbalance as a result of insulin machinery impairment. Therefore, it is imperative to recommend dietary intervention for attenuating the testicular dysfunction and oxidative stress resulting from STZ-induction of diabetes. METHODS: STZ-induced diabetes (65 mg/kg, ip) was treated with QEYEM (50, 100 and 200 mg/kg/day) and quercetin (50 mg/kg/day) for 7weeks...
October 19, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29040945/quercetin-protects-mouse-liver-against-triptolide-induced-hepatic-injury-by-restoring-th17-treg-balance-through-tim-3-and-tlr4-myd88-nf-%C3%AE%C2%BAb-pathway
#8
Cai-Bing Wei, Kun Tao, Rong Jiang, Lian-Di Zhou, Qi-Hui Zhang, Chun-Su Yuan
Triptolide (TP) is a diterpene triepoxide with various biological activities, but its clinical applications have been limited by potential hepatotoxicity, which can be attributed to T helper 17 (Th17)/T regulatory (Treg) cell imbalance. Quercetin (QE), a natural flavonoid, has been reported to have many benefits and medicinal properties, including hepatoprotective activity against TP-induced liver injury. However, the hepatoprotection mechanisms have not been clarified. The present study was designed to explore the protective effect and the mechanism of QE against TP-induced liver injury...
October 14, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29030990/novel-nanohydrogel-of-hyaluronic-acid-loaded-with-quercetin-alone-and-in-combination-with-temozolomide-as-new-therapeutic-tool-cd44-targeted-based-of-glioblastoma-multiforme
#9
M Barbarisi, R V Iaffaioli, E Armenia, L Schiavo, G De Sena, S Tafuto, A Barbarisi, V Quagliariello
Glioblastoma multiforme is the most common and aggressive primary brain cancer with only ∼3% of patients surviving more than 3 years from diagnosis. Several mechanisms are involved in drug and radiation resistance to anticancer treatments and among them one of the most important factors is the tumour microenvironment status, characterised by cancer cell hypersecretion of interleukins and cytokines. The aim of our research was the synthesis of a nanocarrier of quercetin combined with temozolomide, to enhance the specificity and efficacy of this anticancer drug commonly used in glioblastoma treatment...
October 14, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29026320/quercetin-inhibits-epithelial-mesenchymal-transition-decreases-invasiveness-and-metastasis-and-reverses-il-6-induced-epithelial-mesenchymal-transition-expression-of-mmp-by-inhibiting-stat3-signaling-in-pancreatic-cancer-cells
#10
Dinglai Yu, Tingting Ye, Yukai Xiang, Zhehao Shi, Jie Zhang, Bin Lou, Fan Zhang, Bicheng Chen, Mengtao Zhou
Quercetin, a flavone, is multifaceted, having anti-oxidative, anti-inflammatory, and anticancer properties. In the present study, we explored the effects of quercetin on the epithelial-mesenchymal transition (EMT) and invasion of pancreatic cancer cells and the underlying mechanisms. We noted that quercetin exerted pronounced inhibitory effects in PANC-1 and PATU-8988 cells. Moreover, quercetin inhibited EMT and decreased the secretion of matrix metalloproteinase (MMP). Meanwhile, we determined the activity of STAT3 after quercetin treatment...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28963941/hepatoprotective-effect-of-quercetin-against-lps-d-galn-induced-acute-liver-injury-in-mice-by-inhibiting-the-ikk-nf-%C3%AE%C2%BAb-and-mapk-signal-pathways
#11
Zhixin Peng, Xiaobao Gong, You Yang, Ligua Huang, Qingyan Zhang, Peng Zhang, Rongzhen Wan, Baoshun Zhang
Quercetin is regarded as a potential hepatoprotective agent in the treatment of acute liver injury. However, the underlying mechanism of how quercetin to protect against lipopolysaccharides/d-galactosamine (LPS/d-GalN) induced acute liver injury remains unclear. To investigate the mechanism, the antioxidative, anti-inflammatory and antiapoptotic responses were performed. The results showed that quercetin pretreatment improved the survival rate and substantially reduced the liver histopathological changes in mice...
September 27, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28962868/chemopreventive-effects-of-fitoprot-against-5-fluorouracil-induced-toxicity-in-hacat-cells
#12
Edvande Xavier Dos Santos Filho, Artur Christian Garcia da Silva, Renato Ivan de Ávila, Aline Carvalho Batista, Ricardo Neves Marreto, Eliana Martins Lima, Cecília Maria Alves de Oliveira, Elismauro Francisco Mendonça, Marize Campos Valadares
AIMS: This study evaluated the mechanisms involved in the chemopreventive effects of a mucoadhesive formulation (FITOPROT), containing curcuminoids from Curcuma longa L. (Zingiberaceae) and Bidens pilosa L. (Asteraceae) extract, against 5-FU-induced cellular toxicity using an in vitro oral mucositis model. MAIN METHODS: Effects of FITOPROT on 5-FU-induced cytotoxicity in HaCaT and SSC-4 cells were evaluated by MTT assay. For mechanistic analyzes, HaCaT cells were first pretreated with FITOPROT (0...
September 26, 2017: Life Sciences
https://www.readbyqxmd.com/read/28931163/influence-of-quercetin-in-the-temporal-regulation-of-redox-homeostasis-in-drosophila-melanogaster
#13
Perumal Subramanian, Kanimozhi Kaliyamoorthy, Jaime Jacqueline Jayapalan, Puteri Shafinaz Abdul-Rahman, Onn Haji Hashim
Numerous biological processes are governed by the biological clock. Studies using Drosophila melanogaster (L.) are valuable that could be of importance for their effective applications on rodent studies. In this study, the beneficial role of quercetin (a flavonoid) on H2O2 induced stress in D. melanogaster was investigated. D. melanogaster flies were divided into four groups (group I - control, group II - H2O2 (acute exposure), group III - quercetin, and group IV - quercetin + H2O2 treated). Negative geotaxis assay, oxidative stress indicators (protein carbonyls, thiobarbituric reactive substances [TBARS]), and antioxidants (superoxide dismutase [SOD], catalase [CAT], glutathione-S-transferase [GST], glutathione peroxidase, and reduced glutathione [GSH]) were measured at 4 h intervals over 24 h and temporal expression of heat shock protein-70 (Hsp70), Upd1 (homolog of IL-6 in Drosophila), and nitric oxide synthase (Nos) was analyzed by Western blotting...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28928906/comparison-of-anti-inflammatory-effects-of-flavonoid-rich-common-and-tartary-buckwheat-sprout-extracts-in-lipopolysaccharide-stimulated-raw-264-7-and-peritoneal-macrophages
#14
Tae Gyu Nam, Tae-Gyu Lim, Bong Han Lee, Sol Lim, Hee Kang, Seok Hyun Eom, Miyoung Yoo, Hae Won Jang, Dae-Ok Kim
Buckwheat sprouts have been widely consumed all around world due to their great abundance of bioactive compounds. In this study, the anti-inflammatory effects of flavonoid-rich common buckwheat sprout (CBS) and tartary buckwheat sprout (TBS) extracts were evaluated in lipopolysaccharide- (LPS-) stimulated RAW 264.7 murine macrophages and primary peritoneal macrophages from male BALB/c mice. Based on the reversed-phase HPLC analysis, the major flavonoids in CBS were determined to be C-glycosylflavones (orientin, isoorientin, vitexin, and isovitexin), quercetin-3-O-robinobioside, and rutin, whereas TBS contained only high amounts of rutin...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28923363/anti-inflammatory-effects-of-flavonoids-in-neurodegenerative-disorders
#15
Carmela Spagnuolo, Stefania Moccia, Gian Luigi Russo
Neuroinflammation is one of the main mechanisms involved in the progression of several neurodegenerative diseases, such as Parkinson, Alzheimer, multiple sclerosis, amyotrophic lateral sclerosis and others. The activation of microglia is the main feature of neuroinflammation, promoting the release of pro-inflammatory cytokines and resulting in the progressive neuronal cell death. Natural compounds, such as flavonoids, possess neuroprotective potential probably related to their ability to modulate the inflammatory responses involved in neurodegenerative diseases...
September 7, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28914791/quercetin-attenuates-manganese-induced-neuroinflammation-by-alleviating-oxidative-stress-through-regulation-of-apoptosis-inos-nf-%C3%AE%C2%BAb-and-ho-1-nrf2-pathways
#16
Entaz Bahar, Ji-Ye Kim, Hyonok Yoon
Manganese (Mn) is an essential trace element required for the development of human body and acts as an enzyme co-factor or activator for various reactions of metabolism. While essential in trace amounts, excessive Mn exposure can result in toxic accumulations in human brain tissue and resulting extrapyramidal symptoms called manganism similar to idiopathic Parkinson's disease (PD). Quercetin (QCT) has been demonstrated to play an important role in altering the progression of neurodegenerative diseases by protecting against oxidative stress...
September 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28912714/anti-inflammatory-and-analgesic-effects-of-polygonum-orientale-l-extracts
#17
Kai-Jun Gou, Rui Zeng, Yan Dong, Qi-Qi Hu, Huang-Wan-Yin Hu, Katherine G Maffucci, Qi-Ling Dou, Qing-Bo Yang, Xu-Hua Qin, Yan Qu
Background and Purpose:Polygonum orientale L. (family: Polygonaceae), named Hongcao in China, is a Traditional Chinese Medicinal and has long been used for rheumatic arthralgia and rheumatoid arthritis. However, no pharmacological and mechanism study to confirm these clinic effects have been published. In this investigation, the anti-inflammatory, analgesic effects and representative active ingredient compounds of P. orientale have been studied. Methods: Dried small pieces of the stems and leaves of P. orientale were decocted with water and partitioned successively to obtain ethyl acetate and ethyl ether extract of P...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28878808/luteolin-quercetin-genistein-and-quercetagetin-inhibit-the-effects-of-lipopolysaccharide-obtained-from-porphyromonas-gingivalis-in-h9c2-cardiomyoblasts
#18
Gloria Gutiérrez-Venegas, Alfredo Torras-Ceballos, Juan Arturo Gómez-Mora, Berenice Fernández-Rojas
BACKGROUND: One of the microorganisms from dental plaque associated with severe inflammatory responses in infectious endocarditis is Porphyromonas gingivalis. It is a Gram-negative bacteria harvested from chronic periodontitis patients. Lipopolysaccharide (LPS) obtained from P. gingivalis promotes the expressions of interleukin-1 (IL-1), IL-6 and tumor necrosis factor alpha (TNF-α). Flavonoids are thought to participate in processes that control inflammation, such as the expression of cyclooxygenase-2 (COX-2)...
2017: Cellular & Molecular Biology Letters
https://www.readbyqxmd.com/read/28873724/combinative-effect-of-sardine-peptides-and-quercetin-alleviates-hypertension-through-inhibition-of-angiotensin-i-converting-enzyme-activity-and-inflammation
#19
Jianming Luo, Cheng Zhang, Qianyue Liu, Shiyi Ou, Lili Zhang, Xichun Peng
Hypertension had relation to angiotensin I converting enzyme (ACE) activity and inflammation. In our previous research, sardine peptides (SP) with ACE inhibitory activity were prepared. However, the combinative effect of SP and quercetin (QC) on hypertension alleviation was still unknown. In the present study, the antihypertensive effect of SP and QC was discovered and the optimal proportion of SP and QC (v/v=8:2, with 20.00mg/mL of SP and 12.99μg/mL of QC for their original concentrations) was screened on ACE activity inhibition in vitro...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28869898/3-o-glucosylation-of-quercetin-enhances-inhibitory-effects-on-the-adipocyte-differentiation-and-lipogenesis
#20
Chang Won Lee, Jeong Yeon Seo, Jisun Lee, Ji Won Choi, Sarang Cho, Jae Youn Bae, Jae Kyung Sohng, Sung Oog Kim, Jihoon Kim, Yong Il Park
Glycosylation of natural flavonoids with various sugar moieties can affect their physicochemical and pharmacological properties. In this study, the plant flavonoids quercetin aglycon (Quer) and quercetin 3-O-glucoside (Q3G) were evaluated and compared for their potential anti-obesity effects. The Q3G dose-dependently reduced the TG contents and lipid accumulation in 3T3-L1 adipocyte cells, by 52% and 60% at 20μM, respectively, compared to differentiated control (100%), which were 1.6-fold and 2.4-fold higher reduction than Quer...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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