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31 articles for “Quercetin”
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Research ArticleOpen accessEvery word in the titleNasal Administration of Quercetin Liposomes Modulate Cognitive Impairment and Inhibit Acetylcholinesterase Activity in HippocampusTerdthai Tong-Un, Supaporn Muchimapura, Wathita Phachonpai, Jintanaporn WattanathornProblem statement: Oxidative stress is a major factor implicated in the degeneration of cholinergic neurons in Alzheimer’s Disease (AD). Several reports have indicated that antioxidant intake is beneficial to delay or inhibit the progression of this disease. Presently, Acetylcholinesterase (AChE) inhibitors are the mainstay of therapy for AD. Quercetin, one of the flavonoids in fruits and vegetables, has a powerful … …Neuroscience International, Vol. 1, Issue 1 · 30 Jun 2010 · 7,170 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNeuroprotective Effect of Quercetin Encapsulated Liposomes: A Novel Therapeutic Strategy against Alzheimer’s DiseaseW. Phachonpai, J. Wattanathorn, S. Muchimapura et al.Problem statement: The prevalence of Alzheimer’s disease is increasing but the efficacy of treatment is still very limited due to various factors including the blood brain barrier. Recent findings demonstrated the crucial role of oxidative stress on the pathophysiology of disease. In addition the burden of blood brain barrier can be overcome by nasal administration and vesicle-carrier mediated delivery system. … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 9,449 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleQuercetin, Quercetrin Except Rutin Potentially Increased Pirarubicin Cytotoxicity by Non-Competitively Inhibiting the P-Glycoprotein-and MRP1 Function in Living K562/adr and GLC4/adr CellsWinit Choiprasert, Nathupakorn Dechsupa, Suchart Kothan et al.Problem statement: Quercetin and its glycoside derivatives are increasingly receiving interests as new generation of anticancer molecules and were recognized by multidrug resistant transporters such as P-glycoprotein and MRP1 protein. Of relevance to their use as anticancer agents alone or in combination with other agents, this study aims to analyze the interaction of the compounds with the MDR transporters including … …American Journal of Pharmacology and Toxicology, Vol. 5, Issue 1 · 31 Mar 2010 · 9,670 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Flavonoid, Quercetin, Inhibits HIV-1 Infection in Normal Peripheral Blood Mononuclear CellsMadhavan P.N. Nair, Zainulabedin M. Saiyed, Nimisha H. Gandhi, C. N. RamchandProblem statement: Flavonoids and related polyphenols, have been known to possess cardioprotective, anti-tumor, anti-inflammatory, anti-allergic and anti-viral activities. Previous studies have shown that flavonoid, quercetin significantly downregulates expression of pro-inflammatory cytokines in cultured cells via modulation of NFκB and p38MAPK signaling pathways. In the current study, we hypothesize that quercetin exerts anti-HIV activity by differential modulation of pro-and anti-inflammatory cytokine … …American Journal of Infectious Diseases, Vol. 5, Issue 2 · 30 Jun 2009 · 12,184 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIntranasal Administration of Quercetin Liposome Decreases Anxiety-like Behavior and Increases Spatial MemoryJintanaporn Wattanathorn, Wathita Phachonpai, Aroonsri Priprem, Saengrawee SuthiparinyanontAt present, the effects of quercetin liposome on anxiolytic activity and cognitive function are unclearly known. In this study, male Wistar rats were administered quercetin liposome via intranasal route once daily continually for 4 weeks. The anxiolytic activity and cognitive enhancing effect were determined after single administration, 1, 2, 3 and 4 weeks of treatment using elevated plus maze test … …American Journal of Agricultural and Biological Sciences, Vol. 2, Issue 1 · 31 Mar 2007 · 9,091 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRelation between Macroscopic Binding Constant and the Anticancer Efficacy of the Bovine Serum Albumin-Quercetin Complex against Drug-Sensitive and Drug-Resistant CellsWinit Choiprasert, Chatchanok Loetchutinat, Nathupakorn Dechsupa, Samlee MankhetkornProblem statement: We have previously analyzed the interaction of BSA with flavonoids by using FRET. In this study, the role of BSA on increasing in solubility and on carrying the quercetin derivatives thus enhanced their anticancer efficacy against drug-sensitive and drug-resistant cells were conducted. Approach: The macroscopic (KD) and microscopic (kd) binding constant of the complexation and the cellular partition … …American Journal of Biochemistry and Biotechnology, Vol. 7, Issue 1 · 27 May 2011 · 8,292 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleInfluence of Quercetin on Diabetes-Induced Alteration in CYP3A Activity and Bioavailability of Pioglitazone in RatsSudhir Niranjan Umathe, Pankaj Vinod Dixit, Jignesh Manubhai Vaghasiya, Nishant Sudhir JainProblem statement: Quercetin-a common bioflavonoid, is present in herbal preparations consumed by diabetic patients along with routine anti-diabetic agents. We recently showed that quercetin increases the bioavailability of pioglitazone in non-diabetic rats. Thus, present study investigated whether this pharmacokinetic interaction is also evident in diabetic animals, especially because diabetic subjects have altered gastrointestinal (GI) function and CYP3A activity. Approach: The … …American Journal of Infectious Diseases, Vol. 5, Issue 2 · 30 Jun 2009 · 7,818 accessesView PDFCite
Review ArticleOpen accessIn the keywordsDietary Flavonols With Antiviral Efficacy: Safety and Regulatory ConcernsTanisha Parvez, Tanveer Yaqub, Shama Parveen, Mohammad Khalid ParvezGlobally, a variety of pharmacologically-active plant or natural products are commonly consumed as health-protective dietary supplements. These are marketed as crude formulations, isolated metabolites, multi-vitamins, essential amino acids, unsaturated fatty acids and minerals. Of these, pharmacologically-active flavonols like rutin, quercetin, kaempferol, myricetin, isorhamnetin are the most consumed dietary supplements. In addition to their broad-spectrum therapeutic benefits, these are also known … …American Journal of Pharmacology and Toxicology, Vol. 20, Issue 1 · 19 Apr 2026 · 1,866 accessesView PDFCite
HypothesisOpen accessIn the keywordsNatural Substances as New Potential Strategies for the Treatment of Leishmaniosisin DogsDe Vito Virginia, Helen Owen, Amnart Poapolathep, Giorgi MarioLeishmaniasis is a disease caused by the protozoan parasites Leishmania, infecting numerous mammal species. Canine leishmaniasis is potentially zoonotic and causes severe fatal disease in dogs. The discovery of new natural products extracted from medicinal plants or compounds derived from them, such as quercetin, hesperidin, vitamin c, horse chestnut extract and selenium could represent a valuable source of new medicinal … …American Journal of Animal and Veterinary Sciences, Vol. 12, Issue 3 · 6 Sep 2017 · 8,857 accessesView PDFCite
Research ArticleOpen accessIn the abstractStudy of Ageratum conyzoides L. (Asteraceae) Phytochemical Composition as Quorum-sensing Inhibitors to Combat Antibiotic-resistant Bacterial InfectionsEli Compaoré, Lassané Ouedraogo, Ablassé Rouamba et al.The rise of antibiotic-resistant bacterial infections has intensified the search for plant-derived quorum-sensing (QS) inhibitors as alternative therapeutic strategies. Ageratum conyzoides L. has a long history of traditional use as an antimicrobial agent against multidrug-resistant pathogens, yet the phytochemical basis of its QS-inhibitory activity remains incompletely characterized. This study aimed to investigate the phytochemical composition of A. conyzoides and evaluate … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 3 Apr 2026 · 1,772 accessesView PDFCite