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Dihydromyricetin

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https://www.readbyqxmd.com/read/29425256/dihydromyricetin-improves-type-2-diabetes-induced-cognitive-impairment-via-suppressing-oxidative-stress-and-enhancing-brain-derived-neurotrophic-factor-mediated-neuroprotection-in-mice
#1
Hongyan Ling, Zemei Zhu, Jihua Yang, Jianqin He, Sisi Yang, Di Wu, Shuidong Feng, Duanfang Liao
Type 2 diabetes mellitus (T2DM) leads to cognitive impairment (CI), but there have been no effective pharmacotherapies or drugs for cognitive dysfunction in T2DM. Dihydromyricetin (DHM) is a natural flavonoid compound extracted from the leaves of Ampelopsis grossedentata and has various pharmacological effects including anti-oxidant and anti-diabetes. Thus, we investigated the effects of DHM on CI in T2DM mouse model and its possible mechanism. To induce T2DM, mice were fed with high-sugar and high-fat diet for 8 weeks, followed by a low dose streptozotocin (STZ) administration...
February 7, 2018: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29331105/dietary-factors-modulate-colonic-tumorigenesis-through-the-interaction-of-gut-microbiota-and-host-chloride-channels
#2
Yong Zhang, Chao Kang, Xiao-Lan Wang, Min Zhou, Meng-Ting Chen, Xiao-Hui Zhu, Kai Liu, Bin Wang, Qian-Yong Zhang, Jun-Dong Zhu, Man-Tian Mi
SCOPE: In recent decades, the association between diet, gut microbiota and the risk of colorectal cancer (CRC) has been established. Gut microbiota and associated metabolites, such as bile acids and butyrate, are now known to play a key role in CRC development. The aim of this study was to identify the progression to CRC is influenced by cholic acid, sodium butyrate, a high-fat diet or different dose of dihydromyricetin (DMY) interacted with gut microbiota. METHODS AND RESULTS: An AOM/DSS (azoxymethan/dextran sodium sulfate) model was established to study the gut microbiota compsition before and after tumor formation during colitis-induced tumorigenesis...
January 13, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29310441/dihydromyricetin-ameliorates-nonalcoholic-fatty-liver-disease-by-improving-mitochondrial-respiratory-capacity-and-redox-homeostasis-through-modulation-of-sirt3-signaling
#3
Xianglong Zeng, Jining Yang, Ou Hu, Juan Huang, Li Ran, Mengting Chen, Yu Zhang, Xi Zhou, Jundong Zhu, Qianyong Zhang, Long Yi, Mantian Mi
AIMS: Our previous clinical trial indicated that the flavonoid dihydromyricetin (DHM) could improve hepatic steatosis in patients with NAFLD, altough the potential mechanisms of these effects remained elusive. Here, we investigated the hepatoprotective role of DHM on high-fat diet (HFD)-induced NAFLD. RESULTS: DHM supplementation could effectively ameliorate the development of NAFLD by inhibiting hepatic lipids accumulation both in HFD-fed wild type mice and in palmitic acid (PA)-induced hepatocytes...
January 8, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29258286/optimizing-the-maximum-recovery-of-dihydromyricetin-from-chinese-vine-tea-ampelopsis-grossedentata-using-response-surface-methodology
#4
Umair Muhammad, Hedong Lu, Juan Wang, Jinzhi Han, Xiaoyu Zhu, Zhaoxin Lu, Sultana Tayyaba, Yousef I Hassan
This work provides an optimized extraction approach intended to maximize the recovery of dihydromyricetin (DHM) from Chinese vine tea (Ampelopsis grossedentata) leaves. The presented work adopts a Box-Behnken design as a response surface methodology to understand the role and influence of specific extraction parameters including: time, temperature, and solvent composition/ethanol (%) on DHM final yields. Initially, single factor experiments were used to delineate the role of above factors (temperature, time, and solvent composition) before proceeding with three factors-three levels Box-Behnken design with 17 separate runs to assess the effect of multifactorial treatments on DHM recovery rates...
December 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29235425/antibacterial-effect-of-2r-3r-dihydromyricetin-on-the-cellular-functions-of-staphylococcus-aureus
#5
Yan-Ping Wu, Jin-Rong Bai, Kai Zhong, Ding-Ding Bai, Yi-Na Huang, Kai Xiao, Yun Ran, Hong Gao
The C-3-OH, C-4 carbonyl oxygen and hydrogenation of C2=C3 bond on the C-ring of 2R,3R-dihydromyricetin (DMY) proved to be not necessary for the antibacterial activity against Staphylococcus aureus. DMY significantly decreased the intracellular ATP of S. aureus cells but had few effects on pHin, proline oxidation, succinate dehydrogenase activity or malate dehydrogenase activity.
December 13, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29228897/a-new-buckwheat-dihydroflavonol-4-reductase-dfr-with-a-unique-substrate-binding-structure-has-altered-substrate-specificity
#6
Kenjiro Katsu, Rintaro Suzuki, Wataru Tsuchiya, Noritoshi Inagaki, Toshimasa Yamazaki, Tomomi Hisano, Yasuo Yasui, Toshiyuki Komori, Motoyuki Koshio, Seiji Kubota, Amanda R Walker, Kiyoshi Furukawa, Katsuhiro Matsui
BACKGROUND: Dihydroflavonol 4-reductase (DFR) is the key enzyme committed to anthocyanin and proanthocyanidin biosynthesis in the flavonoid biosynthetic pathway. DFR proteins can catalyse mainly the three substrates (dihydrokaempferol, dihydroquercetin, and dihydromyricetin), and show different substrate preferences. Although relationships between the substrate preference and amino acids in the region responsible for substrate specificity have been investigated in several plant species, the molecular basis of the substrate preference of DFR is not yet fully understood...
December 11, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29225170/dihydromyricetin-sensitizes-human-acute-myeloid-leukemia-cells-to-retinoic-acid-induced-myeloid-differentiation-by-activating-stat1
#7
Ming-Hui He, Qiang Zhang, Gang Shu, Ju-Chun Lin, Ling Zhao, Xiao-Xia Liang, Lizi Yin, Fei Shi, Hua-Lin Fu, Zhi-Xiang Yuan
The success of all-trans retinoic acid (ATRA) in differentiation therapy for patients with acute promyelocytic leukemia (APL) highly encourages researches to apply a new combination therapy based on ATRA. Therefore, research strategies to further sensitize cells to retinoids are urgently needed. In this study, we showed that Dihydromyricetin (DMY), a 2,3-dihydroflavonol compound, exhibited a strong synergy with ATRA to promote APL NB4 cell differentiation. We observed that DMY sensitized the NB4 cells to ATRA-induced cell growth inhibition, CD11b expression, NBT reduction and myeloid regulator expression...
December 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29193391/dihydromyricetin-inhibits-nlrp3-inflammasome-dependent-pyroptosis-by-activating-the-nrf2-signaling-pathway-in-vascular-endothelial-cells
#8
Qin Hu, Ting Zhang, Long Yi, Xi Zhou, Mantian Mi
Increasing evidence demonstrates that pyroptosis, pro-inflammatory programmed cell death, is linked to atherosclerosis; however, the underlying mechanisms remain to be elucidated. Dihydromyricetin (DHM), a natural flavonoid, was reported to exert anti-oxidative and anti-inflammatory bioactivities. However, the effect of DHM on atherosclerosis-related pyroptosis has not been studied. In the present study, palmitic acid (PA) treatment led to pyroptosis in human umbilical vein endothelial cells (HUVECs), as evidenced by caspase-1 activation, LDH release, and propidium iodide-positive staining; enhanced the maturation and release of proinflammatory cytokine IL-1β and activation of the NLRP3 inflammasome; and markedly increased intracellular reactive oxygen species (ROS) and mitochondrial ROS (mtROS) levels...
November 29, 2017: BioFactors
https://www.readbyqxmd.com/read/29160030/dihydromyricetin-enhances-glucose-uptake-by-inhibition-of-mek-erk-pathway-and-consequent-down-regulation-of-phosphorylation-of-ppar%C3%AE-in-3t3-l1-cells
#9
Lei Liu, Min Zhou, Hedong Lang, Yong Zhou, Mantian Mi
Accumulating evidence suggests that inhibition of mitogen-activated protein kinase signalling can reduce phosphorylation of peroxisome proliferator-activated receptor γ (PPARγ) at serine 273, which mitigates obesity-associated insulin resistance and might be a promising treatment for type 2 diabetes. Dihydromyricetin (DHM) is a flavonoid that has many beneficial pharmacological properties. In this study, mouse fibroblast 3T3-L1 cells were used to investigate whether DHM alleviates insulin resistance by inhibiting PPARγ phosphorylation at serine 273 via the MEK/ERK pathway...
November 21, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29128706/consumption-of-ellagic-acid-and-dihydromyricetin-synergistically-protects-against-uv-b-induced-photoaging-possibly-by-activating-both-tgf-%C3%AE-1-and-wnt-signaling-pathways
#10
Na Rang Moon, Suna Kang, Sunmin Park
Ellagic acid (EGA) and dihydromyricetin (DHM) are both found in fruits and vegetables are used for anti-aging treatment for the skin. The anti-photoaging efficacy of EGA and DHM was investigated in UV-B irradiated skin in vivo and the involvement of transforming growth factor (TGF)-β1 and wnt signaling pathways were examined in vitro. HaCaT cells were treated with either 50μM EGA, 50μM DHM or 25μM EGA+25μM DHM before 100mJ/cm2 UV-B exposure, and then oxidative stress and inflammation was measured. The involvement of TGF-β1 and wnt signaling was measured using their inhibitors, respectively, in HaCaT cells...
November 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29078260/dihydromyricetin-prevents-monocrotaline-induced-pulmonary-arterial-hypertension-in-rats
#11
Qinghai Li, Jun Wang, Xianying Zhu, Zhilin Zeng, Xiaomei Wu, Yongjian Xu, Jungang Xie, Jun Yu
Pulmonary artery hypertension (PAH) is a chronic and deadly disease, for which effective medical treatments are lacking. Here, we investigated whether 2R,3R-dihydromyricetin (DHM) could prevent monocrotaline (MCT)-induced PAH in rats. The MCT-injected rats were treated with normal saline or DHM (100mg/kg body weight/d) for 4 weeks, followed by measurements of right ventricular systolic pressure (RVSP), right ventricular hypertrophy index (RVHI), pulmonary arterial remodeling (PAR), and expression levels of IL-6, TNF-α, and IL-10...
October 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29067862/molecular-inhibitory-mechanism-of-dihydromyricetin-on-mushroom-tyrosinase
#12
Jianmin Chen, Shiqi Liu, Ziyao Huang, Weiyue Huang, Qinglian Li, Yaling Ye
Tyrosinase is the rate-limiting enzyme for controlling the production of melanin in the human body, and overproduction of melanin can lead to a variety of skin disorders. In this paper, the inhibitory kinetics of Dihydromyricetin (DHM) on tyrosinase and their binding mechanism were determined using spectroscopy, molecular docking, antioxidant assays and chromatography. The spectroscopic results indicate that DHM reversibly inhibits tyrosinase in a mix-type manner through a multiphase kinetic process with the IC50 of 849...
October 25, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29058041/dihydromyricetin-exerts-a-rapid-antidepressant-like-effect-in-association-with-enhancement-of-bdnf-expression-and-inhibition-of-neuroinflammation
#13
Zhaoxiang Ren, Pengju Yan, Liushuai Zhu, Huicui Yang, Yafei Zhao, Brian P Kirby, John L Waddington, Xuechu Zhen
RATIONALE: Major depressive disorder (MDD) is a highly prevalent illness that affects large populations across the world, and increasing evidence suggests that neuroinflammation and levels of brain-derived neurotrophic factor (BDNF) are closely related to depression. Dihydromyricetin (DHM) is a kind of flavonoid natural product that has been reported to display multiple pharmacological effects, including anti-inflammatory and anti-oxidative properties, and these may contribute to ameliorate MDD...
October 20, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29039563/inhibition-of-human-lung-cancer-proliferation-through-targeting-stromal-fibroblasts-by-dihydromyricetin
#14
Kai-Jie Fan, Bo Yang, Yang Liu, Xiao-Dong Tian, Bo Wang
In the present study, the effects of dihydromyricetin on the proliferative potential of fibroblasts and lung carcinoma cells were investigated. Markedly higher expression levels of smooth muscle actin and platelet derived growth factors (PDGFs) were observed in the fibroblasts using reverse transcription-polymerase chain reaction analysis. The expression levels of PDGF-A and PDGF-B were also higher in the lung cancer cells. Western blot analysis revealed higher expression levels of the receptor for platelet-derived growth factor (PDGFRβ) in the lysates from fibroblasts obtained from normal tissues and carcinoma tissues...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29039483/dihydromyricetin-protects-against-lipopolysaccharide%C3%A2-induced-cardiomyocyte-injury-through-the-toll%C3%A2-like-receptor%C3%A2-4-nuclear-factor%C3%A2-%C3%AE%C2%BAb-pathway
#15
Meng-Qiao Zhou, Ling Shao, Jing Wu, Na Peng, Lu-Ping Jin, Guo-Zhen Wei, Wei Cheng, Chang-Jin Deng
Dihydromyricetin (DHM) is a bioactive flavonoid compound extracted from the stems and leaves of Ampelopsis grossedentata. Previous studies have indicated that DHM has antioxidation and antitumor capabilities, while the effect of DHM on lipopolysaccharide (LPS)‑induced cardiomyocyte injury has not been clarified. Therefore, the aim of the present study was to investigate the effect of DHM on LPS‑induced cardiomyocyte injury. In the present study, cardiomyocytes were randomized to the control (PBS), LPS and DHM + LPS groups...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28974890/dihydromyricetin-mediated-inhibition-of-the-notch1-pathway-induces-apoptosis-in-qgy7701-and-hepg2-hepatoma-cells
#16
Cai-Jie Lu, Yi-Feng He, Wei-Zhuang Yuan, Li-Jun Xiang, Jian Zhang, Yan-Rui Liang, Juan Duan, Yun-He He, Ming-Yi Li
AIM: To investigate whether Dihydromyricetin (DHM) inhibits cell proliferation and promotes apoptosis by downregulating Notch1 expression. METHODS: The correlation between Notch1 and Hes1 (a Notch1 target molecule) expression in hepatoma samples was confirmed by qRT-PCR. In addition, MTT assays, flow cytometry and TUNEL analysis showed that DHM possessed strong anti-tumor properties, evidenced not only by reduced cell proliferation but also by enhanced apoptosis in QGY7701 and HepG2 hepatocellular carcinoma (HCC) cells...
September 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28947908/the-versatile-effects-of-dihydromyricetin-in-health
#17
REVIEW
Hongliang Li, Qisheng Li, Zhaowen Liu, Kai Yang, Zhixi Chen, Qilai Cheng, Longhuo Wu
Dihydromyricetin is a flavonoid isolated from Ampelopsis grossedentata, which is traditionally used in China. Dihydromyricetin exhibits health-benefiting activities with minimum adverse effects. Dihydromyricetin has been demonstrated to show antioxidative, anti-inflammatory, anticancer, antimicrobial, cell death-mediating, and lipid and glucose metabolism-regulatory activities. Dihydromyricetin may scavenge ROS to protect against oxidative stress or potentiate ROS generation to counteract cancer cells selectively without any effects on normal cells...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28940200/unravelling-the-inhibitory-effect-of-dihydromyricetin-on-heterocyclic-aromatic-amines-formation
#18
Bin Zhou, Yueliang Zhao, Xichang Wang, Kawing Cheng, Mingfu Wang
BACKGROUND: Heterocyclic aromatic amines (HAAs) are mutagens and rodent carcinogens. Flavonoids have attracted considerable attention for development into effective inhibitors against the formation of genotoxic heterocyclic aromatic amines (HAAs) in thermally processed foods. RESULTS: The inhibitory effect of dihydromyricetin (DMY) on the formation of key HAAs, including 2-amino-1-methyl-6- phenylimidazo[4,5-b]pyridine (PhIP), 2-amino-3,8-dimethylimidazo[4,5-f]-quinoxaline (MeIQx), and 2-amino-3,4,8-trimethylimidazo[4,5-f]quinoxaline (4,8-DiMeIQx) was significant...
September 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28934913/flavonoid-compounds-related-to-seed-coat-color-of-wheat
#19
Noriko Kohyama, Makiko Chono, Hiroyuki Nakagawa, Yosuke Matsuo, Hiroshi Ono, Hitoshi Matsunaka
In red wheat, reddish-brown pigments accumulate in testa of mature seeds. Half-cut wheat seeds were immersed in p-dimethylaminocinnamaldehyde (DMACA) reagent that stains flavanol structures blue. Testa of 10-40 days after flowering (DAF) in red wheat ("Norin 61" and "Satonosora") seeds were stained blue and the reagent color changed to blue with 10-25 DAF seeds. No blue staining was observed in white wheat ("Tamaizumi") seeds during maturation. "Norin 61" seed coats at 10 DAF contained dihydroquercetin, dihydromyricetin, (+)-catechin, procyanidin B3, and prodelphinidin B3, which were identified by HPLC-diode array detector and LC-MS/MS analyses...
November 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28795912/effects-of-verapamil-on-the-pharmacokinetics-of-dihydromyricetin-in-rats-and-its-potential-mechanism
#20
Yixiang Huang, Junyong Zhao, Wei Jian, Gang Wang
1. This study investigates the effects of verapamil on the pharmacokinetics of dihydromyricetin in rats and clarifies its main mechanism. 2. The pharmacokinetic profiles of oral or intravenous administration of dihydromyricetin in Sprague-Dawley rats with or without pretreatment with verapamil were investigated. In addition, the effects of verapamil on the transport and metabolic stability of dihydromyricetin were investigated using Caco-2 cell transwell model and rat liver microsomes. 3. In the oral group, verapamil could significantly increase Cmax, and decrease oral clearance of dihydromyricetin (p < 0...
August 30, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
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