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Yu W, Gong F, Xu H, Zhou X. Molecular Mechanism of Exogenous ABA to Enhance UV-B Resistance in Rhododendron chrysanthum Pall. by Modulating Flavonoid Accumulation. Int J Mol Sci 2024; 25:5248. [PMID: 38791294 PMCID: PMC11121613 DOI: 10.3390/ijms25105248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
With the depletion of the ozone layer, the intensity of ultraviolet B (UV-B) radiation reaching the Earth's surface increases, which in turn causes significant stress to plants and affects all aspects of plant growth and development. The aim of this study was to investigate the mechanism of response to UV-B radiation in the endemic species of Rhododendron chrysanthum Pall. (R. chrysanthum) in the Changbai Mountains and to study how exogenous ABA regulates the response of R. chrysanthum to UV-B stress. The results of chlorophyll fluorescence images and OJIP kinetic curves showed that UV-B radiation damaged the PSII photosystem of R. chrysanthum, and exogenous ABA could alleviate this damage to some extent. A total of 2148 metabolites were detected by metabolomics, of which flavonoids accounted for the highest number (487, or 22.67%). KEGG enrichment analysis of flavonoids that showed differential accumulation by UV-B radiation and exogenous ABA revealed that flavonoid biosynthesis and flavone and flavonol biosynthesis were significantly altered. GO analysis showed that most of the DEGs produced after UV-B radiation and exogenous ABA were distributed in the cellular process, cellular anatomical entity, and catalytic activity. Network analysis of key DFs and DEGs associated with flavonoid synthesis identified key flavonoids (isorhamnetin-3-O-gallate and dihydromyricetin) and genes (TRINITY_DN2213_c0_g1_i4-A1) that promote the resistance of R. chrysanthum to UV-B stress. In addition, multiple transcription factor families were found to be involved in the regulation of the flavonoid synthesis pathway under UV-B stress. Overall, R. chrysanthum actively responded to UV-B stress by regulating changes in flavonoids, especially flavones and flavonols, while exogenous ABA further enhanced its resistance to UV-B stress. The experimental results not only provide a new perspective for understanding the molecular mechanism of the response to UV-B stress in the R. chrysanthum, but also provide a valuable theoretical basis for future research and application in improving plant adversity tolerance.
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Affiliation(s)
| | | | - Hongwei Xu
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
| | - Xiaofu Zhou
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
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Chen M, Tan J, Jin Z, Jiang T, Wu J, Yu X. Research progress on Sirtuins (SIRTs) family modulators. Biomed Pharmacother 2024; 174:116481. [PMID: 38522239 DOI: 10.1016/j.biopha.2024.116481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024] Open
Abstract
Sirtuins (SIRTs) represent a class of nicotinamide adenine dinucleotide (NAD+)-dependent protein deacetylases that exert a crucial role in cellular signal transduction and various biological processes. The mammalian sirtuins family encompasses SIRT1 to SIRT7, exhibiting therapeutic potential in counteracting cellular aging, modulating metabolism, responding to oxidative stress, inhibiting tumors, and improving cellular microenvironment. These enzymes are intricately linked to the occurrence and treatment of diverse pathological conditions, including cancer, autoimmune diseases, and cardiovascular disorders. Given the significance of histone modification in gene expression and chromatin structure, maintaining the equilibrium of the sirtuins family is imperative for disease prevention and health restoration. Mounting evidence suggests that modulators of SIRTs play a crucial role in treating various diseases and maintaining physiological balance. This review delves into the molecular structure and regulatory functions of the sirtuins family, reviews the classification and historical evolution of SIRTs modulators, offers a systematic overview of existing SIRTs modulation strategies, and elucidates the regulatory mechanisms of SIRTs modulators (agonists and inhibitors) and their clinical applications. The article concludes by summarizing the challenges encountered in SIRTs modulator research and offering insights into future research directions.
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Affiliation(s)
- Mingkai Chen
- Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu, China; School of Medicine Jiangsu University, Zhenjiang, Jiangsu, China
| | - Junfei Tan
- School of Medicine Jiangsu University, Zhenjiang, Jiangsu, China
| | - Zihan Jin
- Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou City, China
| | - Tingting Jiang
- Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu, China
| | - Jiabiao Wu
- Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu, China
| | - Xiaolong Yu
- Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu, China; The Wujin Clinical College of Xuzhou Medical University, Changzhou, Jiangsu, China.
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Wei L, Li X, Yao Y, Wang S, Ai X, Liu S. Study on the molecular mechanism of dihydromyricetin in alleviating liver cirrhosis based on network pharmacology. Chem Biol Drug Des 2024; 103:e14421. [PMID: 38230771 DOI: 10.1111/cbdd.14421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 08/31/2023] [Accepted: 12/03/2023] [Indexed: 01/18/2024]
Abstract
Dihydromyricetin (DHM) is a bioactive flavonoid extracted from Hovenia dulcis, which has various activities. In the present study, the molecular mechanism of dihydromyricetin (DHM) in relieving liver cirrhosis was investigated through network pharmacology and experimental verification. The cell model was induced by TGF-β1 activating the human hepatic stellate cell line (HSC; LX-2). The protein levels of α-SMA, collagen I, and collagen III and pathway-related proteins within LX-2 cells were detected using Western blot. EdU staining was conducted to detect cell proliferation. Immunofluorescence staining was performed to detect the expression levels of α-SMA and collagen I. Next, the drug targets of DHM were screened from the PubChem database. The differentially expressed genes in the liver cirrhosis dataset GSE14323 were identified. The expression of the identified drug targets in LX-2 cells was verified using qRT-PCR. The results showed that TGF-β1 treatment notably increased LX-2 cell viability, promoted cell proliferation, and elevated α-SMA, collagen I, and collagen III protein contents. DHM treatment could partially eliminate TGF-β1 effects, as evidenced by the inhibited cell viability and proliferation and reduced α-SMA, collagen I, and collagen III contents. After network pharmacology analysis, nine differentially expressed target genes (MMP2, PDGFRB, PARP1, BCL2L2, ABCB1, TYR, CYP2E1, SQSTM1, and IL6) in liver cirrhosis were identified. According to qRT-PCR verification, DHM could inhibit the expression of MMP2, PDGFRB, PARP1, CYP2E1, SQSTM1, and IL6, and enhance ABCB1 expression levels within LX-2 cells. Moreover, DHM inhibited mTOR and MAPK signaling pathways in TGF-β1-induced HSCs. In conclusion, DHM could inhibit HSC activation, which may be achieved via acting on MMP2, PDGFRB, PARP1, CYP2E1, SQSTM1, IL6, and ABCB1 genes and their downstream signaling pathways, including mTOR and MAPK signaling pathway.
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Affiliation(s)
- Lin Wei
- College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, Hunan, China
| | - Xiaoying Li
- Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, College of biology and food engineering, Huaihua University, Huaihua, Hunan, China
| | - Yuanzhi Yao
- Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, College of biology and food engineering, Huaihua University, Huaihua, Hunan, China
| | - Siqi Wang
- College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, Hunan, China
| | - Xinghui Ai
- College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, Hunan, China
| | - Shenggui Liu
- Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, College of biology and food engineering, Huaihua University, Huaihua, Hunan, China
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Zeng T, Song Y, Qi S, Zhang R, Xu L, Xiao P. A comprehensive review of vine tea: Origin, research on Materia Medica, phytochemistry and pharmacology. JOURNAL OF ETHNOPHARMACOLOGY 2023; 317:116788. [PMID: 37343650 DOI: 10.1016/j.jep.2023.116788] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/24/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Vine tea is a popular folk tea that has been consumed in China for more than 1200 years. It is often used in ethnic medicine by ethnic groups in southwest China with at least 35 aliases in 10 provinces. In coastal areas, vine tea is mostly used to treat heatstroke, aphtha, aphonia, toothache, etc. In contrast, in the southwest inland regions, vine tea is mostly used to clear away heat and toxic materials, antiphlogosis and relieving sore-throat, lowering blood pressure and lipid levels, and alleviating fatigue. Three main species have been used as the source of vine tea, Nekemias grossedentata, Nekemias cantonensis and Nekemias megalophylla. Among them, the leaves of Nekemias grossedentata were considered as new food resource in complicance with regulations, according to the Food Safety Standards published by the Monitoring and Evaluation Department of the National Health and Family Planning Commission in China. AIM OF THE STUDY At present, the comprehensively summary of Materia Medica on the history and source of vine tea is currently unavailable. The current article summed up the Materia Medica, species origin and pharmacological effects of all 3 major species used in vine tea to fill the knowledge gaps. We also aim to provide a reference for future research on historical textual, resource development and medicinal utilization of vine tea. MATERIALS AND METHODS Adhering to the literature screening methodology outlined by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), this review encompasses 148 scholarly research papers from three database, paper ancient books, local chronicles and folklore through field investigations. We then comprehensively summarized and discussed research progresses in scientific and application studies of vine tea. RESULTS The historical records indicated that vine tea could have been used as early as Southern and Northern Dynasties (AC 420-589). Nekemias grossedentata, Nekemias cantonensis and Nekemias megalophylla, were used to considered as vine tea in the ethnic medicine. The main phytochemicals found in three plants are flavonoids, polyphenols and terpenoids, among which dihydromyricetin (DHM) is the most important and most studied active substance. The key words "Ampelopsis grossedentata" (Synonym of Nekemias grossedentata) and "dihydromyricetin/DHM" showed the highest frequency over the last 27 year based on the research trend analysis. And the ethnopharmacology studies drawn the main activities of vine tea are antioxidant, antibacterial, hepatoprotective, neuroprotective and anti-atherosclerosis activities. CONCLUSIONS This review systematically summarized and discussed vine tea from the following five aspects, history, genetic relationship, phytochemistry, research trend and ethnopharmacology. Vine tea has a long historical usage in Chinese ethnic medicine. Its outstanding therapeutic efficacies have attracted extensive attention in other places in the world at present. Nekemias cantonensis and Nekemias megalophylla are quite similar to Nekemias grossedentata in terms of many aspects. However, the current research has a narrow focus on mainly Nekemias grossedentata and DHM. We propose that future studies could be carried out to determine the synergistic effect of multi-components and multi-targets of vine tea including all 3 species to provide valuable knowledge.
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Affiliation(s)
- Tiexin Zeng
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
| | - Yanjun Song
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
| | - Shunyao Qi
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
| | - Ruyue Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
| | - Lijia Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
| | - Peigen Xiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, 100193, China.
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Wang Z, Cao Z, Yue Z, Yang Z. Research progress of dihydromyricetin in the treatment of diabetes mellitus. Front Endocrinol (Lausanne) 2023; 14:1216907. [PMID: 37732125 PMCID: PMC10507363 DOI: 10.3389/fendo.2023.1216907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/18/2023] [Indexed: 09/22/2023] Open
Abstract
Diabetic Mellitus (DM), a chronic metabolic disorder disease characterized by hyperglycemia, is mainly caused by the absolute or relative deficiency of insulin secretion or decreased insulin sensitivity in target tissue cells. Dihydromyricetin (DMY) is a flavonoid compound of dihydroflavonol that widely exists in Ampelopsis grossedentata. This review aims to summarize the research progress of DMY in the treatment of DM. A detailed summary of related signaling induced by DMY are discussed. Increasing evidence implicates that DMY display hypoglycemic effects in DM via improving glucose and lipid metabolism, attenuating inflammatory responses, and reducing oxidative stress, with the signal transduction pathways underlying the regulation of AMPK or mTOR/autophagy, and relevant downstream cascades, including PGC-1α/SIRT3, MEK/ERK, and PI3K/Akt signal pathways. Hence, the mechanisms underlying the therapeutic implications of DMY in DM are still obscure. In this review, following with a brief introduction of the absorption, metabolism, distribution, and excretion characteristics of DMY, we summarized the current pharmacological developments of DMY as well as possible molecular mechanisms in the treatment of DM, aiming to push the understanding about the protective role of DMY as well as its preclinical assessment of novel application.
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Affiliation(s)
| | | | | | - Zhengfeng Yang
- Precision Research Center for Refractory Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Sekar P, Hsiao G, Hsu SH, Huang DY, Lin WW, Chan CM. Metformin inhibits methylglyoxal-induced retinal pigment epithelial cell death and retinopathy via AMPK-dependent mechanisms: Reversing mitochondrial dysfunction and upregulating glyoxalase 1. Redox Biol 2023; 64:102786. [PMID: 37348156 PMCID: PMC10363482 DOI: 10.1016/j.redox.2023.102786] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/24/2023] Open
Abstract
Diabetic retinopathy (DR) is a major cause of blindness in adult, and the accumulation of advanced glycation end products (AGEs) is a major pathologic event in DR. Methylglyoxal (MGO), a highly reactive dicarbonyl compound, is a precursor of AGEs. Although the therapeutic potential of metformin for retinopathy disorders has recently been elucidated, possibly through AMPK activation, it remains unknown how metformin directly affects the MGO-induced stress response in retinal pigment epithelial cells. Therefore, in this study, we compared the effects of metformin and the AMPK activator A769662 on MGO-induced DR in mice, as well as evaluated cytotoxicity, mitochondrial dynamic changes and dysfunction in ARPE-19 cells. We found MGO can induce mitochondrial ROS production and mitochondrial membrane potential loss, but reduce cytosolic ROS level in ARPE-19 cells. Although these effects of MGO can be reversed by both metformin and A769662, we demonstrated that reduction of mitochondrial ROS production rather than restoration of cytosolic ROS level contributes to cell protective effects of metformin and A769662. Moreover, MGO inhibits AMPK activity, reduces LC3II accumulation, and suppresses protein and gene expressions of MFN1, PGC-1α and TFAM, leading to mitochondrial fission, inhibition of mitochondrial biogenesis and autophagy. In contrast, these events of MGO were reversed by metformin in an AMPK-dependent manner as evidenced by the effects of compound C and AMPK silencing. In addition, we observed an AMPK-dependent upregulation of glyoxalase 1, a ubiquitous cellular enzyme that participates in the detoxification of MGO. In intravitreal drug-treated mice, we found that AMPK activators can reverse the MGO-induced cotton wool spots, macular edema and retinal damage. Functional, histological and optical coherence tomography analysis support the protective actions of both agents against MGO-elicited retinal damage. Metformin and A769662 via AMPK activation exert a strong protection against MGO-induced retinal pigment epithelial cell death and retinopathy. Therefore, metformin and AMPK activator can be therapeutic agents for DR.
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Affiliation(s)
- Ponarulselvam Sekar
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Medical Sciences, Taipei Medical University, Taipei, Taiwan
| | - George Hsiao
- Graduate Institute of Medical Sciences, Taipei Medical University, Taipei, Taiwan
| | - Shu-Hao Hsu
- Medical Research Center, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Duen-Yi Huang
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Wan-Wan Lin
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Medical Sciences, Taipei Medical University, Taipei, Taiwan; Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan.
| | - Chi-Ming Chan
- Department of Ophthalmology, Cardinal Tien Hospital, New Taipei City, Taiwan; School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan.
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Yao Y, Li X, Yang X, Mou H, Wei L. Dihydromyricetin promotes GLP-1 release and glucose uptake by STC-1 cells and enhances the effects of metformin upon STC-1 cells and diabetic mouse model. Tissue Cell 2023; 82:102108. [PMID: 37229936 DOI: 10.1016/j.tice.2023.102108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 05/11/2023] [Accepted: 05/11/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Glucagon-like peptide-1 (GLP-1) is an intestinally produced hormone released by the L-cells to stimulate glucose-dependent insulin release. Vine tea, a traditional Chinese medicine made from the delicate stem and leaves of Ampelopsis grossedentata, has been reported to exert antidiabetic effects; however, the role and mechanism of dihydromyricetin, the main active ingredient of vine tea, remain unclear. METHODS AND RESULTS MTT assay was applied to detect cell viability. GLP-1 levels in the culture medium using a mouse GLP-1 ELISA kit. The level of GLP-1 in cells was examined using IF staining. NBDG assay was performed to evaluate the glucose uptake by STC-1 cells. The in vivo roles of dihydromyricetin in the diabetes mellitus mouse model were investigated. In this study, 25 μM dihydromyricetin, was found to cause no significant suppression of STC-1 cell viability. Dihydromyricetin markedly elevated GLP-1 secretion and glucose uptake by STC-1 cells. Although metformin increased GLP-1 release and glucose uptake by STC-1 cells more, dihydromyricetin further enhanced the effects of metformin. Moreover, dihydromyricetin or metformin alone significantly promoted the phosphorylation of AMPK, increased GLUT4 levels, inhibited ERK1/2 and IRS-1 phosphorylation, and decreased NF-κB levels, and dihydromyricetin also enhanced the effects of metformin on these factors. The in vivo results further confirmed the antidiabetic function of dihydromyricetin. CONCLUSION Dihydromyricetin promotes GLP-1 release and glucose uptake by STC-1 cells and enhances the effects of metformin upon STC-1 cells and diabetic mice, which might ameliorate diabetes through improving L cell functions. The Erk1/2 and AMPK signaling pathways might be involved.
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Affiliation(s)
- Yuanzhi Yao
- College of Biology and Food Engineering, Huaihua University. Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, Huaihua, China
| | - Xiaoying Li
- College of Biology and Food Engineering, Huaihua University. Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, Huaihua, China
| | - Xiaoqin Yang
- College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Hai Mou
- College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Lin Wei
- College of Biology and Food Engineering, Huaihua University. Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, Huaihua, China; College of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, China.
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Nie H, Ji T, Fu Y, Chen D, Tang Z, Zhang C. Molecular mechanisms and promising role of dihydromyricetin in cardiovascular diseases. Physiol Res 2022. [DOI: 10.33549/physiolres.934915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Vine tea, a Chinese herbal medicine, is widely used in traditional Asian medicine to treat common health problems. Dihydromyricetin (DMY) is the main functional flavonoid compound extracted from vine tea. In recent years, preclinical studies have focused on the potential beneficial effects of dihydromyricetin, including glucose metabolism regulation, lipid metabolism regulation, neuroprotection, and anti-tumor effects. In addition, DMY may play a role in cardiovascular disease by resisting oxidative stress and participating in the regulation of inflammation. This review is the first review that summaries the applications of dihydromyricetin in cardiovascular diseases, including atherosclerosis, myocardial infarction, myocardial hypertrophy, and diabetic cardiomyopathy. We also clarified the underlying mechanisms and signaling pathways involved in the above process. The aim of this review is to provide a better understanding and quick overview for future researches of dihydromyricetin in the field of cardiovascular diseases, and more detailed and robust researches are needed for evaluation and reference.
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Affiliation(s)
| | | | | | | | | | - C Zhang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Wei C, Chen X, Chen D, He J, Zheng P, Chen H, Yan H, Yu B, Luo Y, Huang Z. Effects of dietary dihydromyricetin supplementation on intestinal barrier and humoral immunity in growing-finishing pigs. Anim Biotechnol 2022; 33:1398-1406. [PMID: 35838495 DOI: 10.1080/10495398.2022.2099881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this study, we investigated the effect of dietary dihydromyricetin (DHM) supplementation on intestinal barrier and humoral immunity in growing-finishing pigs. The data showed that dietary DHM supplementation improved jejunal barrier function by upregulating the protein expressions of Occludin and Claudin-1 and the mRNA levels of MUC1 and MUC2. Dietary DHM supplementation increased the amylase, lipase, sucrase and maltase activities and the mRNA expression of nutrient transporter (SGLT1, GLUT2, PepT1) in the jejunum mucosa. Dietary DHM supplementation significantly reduced the E. coli population in the cecum and colon and increased the Lactobacillus population in the cecum. In addition, dietary DHM supplementation increased the contents of butyric acid and valeric acid in cecum and colon. In serum, dietary DHM supplementation reduced interleukin-1β (IL-1β) content and increased interleukin-10 (IL-10), Immunoglobulin M (IgM) and Immunoglobulin A (IgA) contents (p < 0.05). In addition, compared with the control group, dietary DHM supplementation improved secretory immunoglobulin A (sIgA) and interleukin-10 (IL-10) contents and down-regulated TNF-α protein expression in jejunum mucosa (p < 0.05). Together, this study demonstrated that dietary DHM supplementation improved intestinal barrier function, digestion and absorption capacity and immune function in growing-finishing pigs.
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Affiliation(s)
- Chuan Wei
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Xiaoling Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Daiwen Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Jun He
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Ping Zheng
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Hong Chen
- College of Food Science, Sichuan Agricultural University, Yaan, P. R. China
| | - Hui Yan
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Bing Yu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Yuheng Luo
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
| | - Zhiqing Huang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, P. R. China
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Protective Effect of Flavonoids against Methylglyoxal-Induced Oxidative Stress in PC-12 Neuroblastoma Cells and Its Structure-Activity Relationships. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227804. [PMID: 36431904 PMCID: PMC9693184 DOI: 10.3390/molecules27227804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
Methylglyoxal-induced oxidative stress and cytotoxicity are the main factors causing neuronal death-related, diabetically induced memory impairment. Antioxidant and anti-apoptotic therapy are potential intervention strategies. In this study, 25 flavonoids with different substructures were assayed for protecting PC-12 cells from methylglyoxal-induced damage. A structure-activity relationship (SAR) analysis indicated that the absence of the double bond at C-2 and C-3, substitutions of the gallate group at the 3 position, the pyrogallol group at the B-ring, and the R configuration of the 3 position enhanced the protection of flavan-3-ols, and a hydroxyl substitution at the 4' and meta-positions were important for the protection of flavonol. These SARs were further confirmed by molecular docking using the active site of the Keap1-Nrf2 complex as the receptor. The mechanistic study demonstrated that EGCG with the lowest EC50 protected the PC-12 cells from methylglyoxal-induced damage by reducing oxidative stress via the Nrf2/Keap1/HO-1 and Bcl-2/Bax signaling pathways. These results suggested that flavan-3-ols might be a potential dietary supplement for protection against diabetic encephalopathy.
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Zeng Z, Ouyang J, Sun L, Zeng F, Wu S. A Biomarker-Responsive Nanosystem with Colon-Targeted Delivery for Ulcerative Colitis's Detection and Treatment with Optoacoustic/NIR-II Fluorescence Imaging. Adv Healthc Mater 2022; 11:e2201544. [PMID: 36098246 DOI: 10.1002/adhm.202201544] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/30/2022] [Indexed: 01/28/2023]
Abstract
Ulcerative colitis (UC) is a prevalent idiopathic inflammatory disease which causes such complications as intestinal perforation, obstruction, and bleeding, and thus deleteriously impacting people's normal work and quality of life. Hence, accurate diagnosis of UC is crucial in terms of planning optimal treatment plan. Herein, a pH/reactive oxygen species (ROS) dual-responsive nanosystem (BM@EP) is developed for UC's detection and therapy. BM@EP is composed of a chromophore-drug dyad and the enteric coating. The chromophore-drug dyad (BOD-XT-DHM) is synthesized by linking the chromophore (BOD-XT-BOH) and a flavonoid drug (dihydromyricetin DHM) through boronate ester bond. The enteric coating includes Eudragit S100 and poly(lactic-co-glycolic acid) (PLGA), the former is commonly employed as a pH-dependent polymer coating excipient so as to attain colon-targeted delivery, and the latter has been widely used as an excipient for the controlled-extended release. After oral administration, BM@EP delivers the dyad (BOD-XT-DHM) into the colon and releases the dyad molecules by being triggered by the alkaline pH in t colon, thereafter upon being stimulated by overexpressed H2 O2 in the inflamed colon, the boronate bond in the dyad is broken down and correspondingly the drug DHM is released for UC therapy, simultaneously the chromophore is released for near-infrared second window (NIR-II) fluorescence and optoacoustic imaging for UC diagnosis and recovery evaluation.
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Affiliation(s)
- Zhuo Zeng
- Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Juan Ouyang
- Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Lihe Sun
- Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Fang Zeng
- Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Shuizhu Wu
- Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
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12
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Zhao N, Kong H, Liu H, Shi Q, Qi X, Chen Q. A network pharmacology approach to evaluate the synergistic effect of dihydromyricetin and myricitrin in vine tea on the proliferation of B16F10 cells. Front Nutr 2022; 9:993133. [PMID: 36185647 PMCID: PMC9524360 DOI: 10.3389/fnut.2022.993133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022] Open
Abstract
Aim of the study Although vine tea has demonstrated broad-spectrum anti-cancer properties, its main active compounds, dihydromyricetin (DMY) and myricitrin (MYT), exert weaker effects than the tea extracts. This study aimed to investigate the synergistic inhibitory effects of DMY and MYT on B16F10 cell proliferation and their synergistic inhibitory effects. Methods The effect of vine tea extracts (VTEs) and their active compounds on B16F10 cells was analyzed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, fluorescence staining, and flow cytometry. The synergistic effects were calculated by the combination index (CI), and its mechanism was discussed by network pharmacology. Results Different VTEs varied in their inhibition of B16F10 cell growth, with IC50 values ranging from 4.45 to 12.95 μg/mL, Among these, Guangzhou Qingyuan (Level 2), appeared to have the most potent inhibitory effect. The IC50 value of mix-use of DMY and MYT was 19.94∼64.4 μM, of which DMY: MYT = 8:1 had the minimum IC50 value of 19.94 μM. Combinations in the 1:1∼8:1 range had stronger effects than the isolated active compound. When they were mixed at the ratio of 1:4∼8:1, CI < 1, showing a synergistic effect. The combination of DMY and MYT also significantly inhibited the tyrosinase activity in B16F10 cells, consistent with its impact on cell proliferation. The eight potential targets were identified by network pharmacology regulating melanin metabolism, tyrosine metabolism, and melanogenesis signaling. According to the analysis of protein-protein interactions, TP53, TNF, and TYR might be critical targets for preventing and treating melanoma. Conclusion We found that DMY and MYT induced apoptosis of B16F10 cells, and their combined application had a significant synergistic effect. The present findings indicated that vine tea had a multi-pathway and multi-target impact on the prevention and treatment of melanoma.
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Qi L, Gao R, Chen Z, Lin D, Liu Z, Wang L, Lin L, Liu X, Liu X, Liu L. Liraglutide reduces oxidative stress and improves energy metabolism in methylglyoxal-induced SH-SY5Y cells. Neurotoxicology 2022; 92:166-179. [PMID: 35985417 DOI: 10.1016/j.neuro.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/08/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
Diabetes mellitus can result in severe complications, such as neurodegenerative diseases including cognitive impairment and dementia. The glucagon-like peptide-1 (GLP-1) receptor agonist, liraglutide, is a novel antidiabetic drug with neuroprotective effects against neurodegenerative diseases. In this study, we explored the protective effect of liraglutide on SH-SY5Y cells exposed to methylglyoxal (MG), a byproduct of glucose metabolism that plays a key role in the development of diabetic encephalopathy. We found that liraglutide reduced the MG-induced oxidative stress, increased the activity of superoxide dismutase (SOD) and expression levels of P22phox, Gp91phox, and Xdh genes, and reduced reactive oxygen species (ROS) content. Metabolomics analysis based on 1H nuclear magnetic resonance showed that liraglutide induced alterations in metabolites involved in energy metabolism,including promotion of gluconeogenesis. Moreover, we found that liraglutide promoted oxidative phosphorylation and inhibited glycolysis in SH-SY5Y cells. This study revealed that liraglutide improved diabetes-related neuropathy damage by reducing the level of oxidative stress and maintaining the balance of energy metabolism, thus offering new insights into the potential mechanism of liraglutide in neuronal protection.
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Affiliation(s)
- Liqin Qi
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Ruonan Gao
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Zhou Chen
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, Fujian, People's Republic of China
| | - Donghai Lin
- Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China
| | - Zhiqing Liu
- Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China
| | - Linxi Wang
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Lijing Lin
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Xiaoying Liu
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Xiaohong Liu
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China
| | - Libin Liu
- Department of Endocrinology, Fujian Institute of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian, People's Republic of China.
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14
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He Y, Yang Z, Pi J, Cai T, Xia Y, Cao X, Liu J. EGCG attenuates the neurotoxicity of methylglyoxal via regulating MAPK and the downstream signaling pathways and inhibiting advanced glycation end products formation. Food Chem 2022; 384:132358. [DOI: 10.1016/j.foodchem.2022.132358] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 01/30/2022] [Accepted: 02/03/2022] [Indexed: 12/16/2022]
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15
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AMPKα2/HNF4A/BORIS/GLUT4 pathway promotes hepatocellular carcinoma cell invasion and metastasis in low glucose microenviroment. Biochem Pharmacol 2022; 203:115198. [DOI: 10.1016/j.bcp.2022.115198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 11/21/2022]
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16
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Leng Q, Zhou J, Li C, Xu Y, Liu L, Zhu Y, Yang Y, Zhang H, Li X. Dihydromyricetin ameliorates diet-induced obesity and promotes browning of white adipose tissue by upregulating IRF4/PGC-1α. Nutr Metab (Lond) 2022; 19:38. [PMID: 35690863 PMCID: PMC9188085 DOI: 10.1186/s12986-022-00672-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 05/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Promoting the browning of white adipose tissue (WAT) is a promising approach for the treatment of obesity and related comorbidities because it increases energy expenditure. In this study, we investigated whether Dihydromyricetin (DHM), a flavonoid component, could ameliorate diet-induced obesity through promoting the browning of WAT. METHODS Male C57BL/6 J mice were received a high-fat diet (HFD) to induce obesity and subsequently were treated with DHM (100 mg/kg/day) or vehicle for 4 weeks. The effects of DHM on weight reduction and metabolic phenotype improvement were observed in the mice. The expression of genes and protein involved in browning of WAT were assessed in inguinal WAT (iWAT) of the mice. Then, the effect of DHM on the inducing browning program was verified in adipocytes differentiated from stromal vascular fraction (SVF) cells of mouse iWAT. Finally, the mechanism by which DHM improves the browning of WAT was explored using RNA-seq and luciferase reporter assay. RESULTS We find that DHM reduces body weight, decreases WAT mass, improves glucose and lipid metabolic disorders, and ameliorates hepatic steatosis in diet-induced obese (DIO) mice. Further studies show that DHM induces WAT browning, which is manifested by increased expression of uncoupling protein 1 (UCP1) and peroxisome proliferator-activated receptor gamma coactivator (PGC)-1α and enhanced mitochondrial activity in iWAT and primary adipocytes. In addition, we also find that DHM enhances interferon regulatory factor 4 (IRF4) expression, which is a key transcriptional regulator of PGC-1α. CONCLUSION Our findings identify that DHM prevents obesity by inducing the browning of WAT through the upregulation of IRF4/PGC-1α, which may have potential therapeutic implications for the treatment of obesity.
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Affiliation(s)
- Qingyang Leng
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianhua Zhou
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chang Li
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yanhong Xu
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lu Liu
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yi Zhu
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Yang
- Department of Endocrinology and Metabolism, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Hongli Zhang
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Xiaohua Li
- Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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17
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Zhang T, Li SM, Li YN, Cao JL, Xue H, Wang C, Jin CH. Atractylodin Induces Apoptosis and Inhibits the Migration of A549 Lung Cancer Cells by Regulating ROS-Mediated Signaling Pathways. Molecules 2022; 27:molecules27092946. [PMID: 35566297 PMCID: PMC9103034 DOI: 10.3390/molecules27092946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/21/2022] [Accepted: 05/03/2022] [Indexed: 12/18/2022] Open
Abstract
Atractylodin (ATR) has anticancer effects on some tumor cells by inducing apoptosis, but its mechanism in lung cancer remains unclear. This study investigates the inhibitory effect of ATR on A549 lung cancer cells. Cell viability was detected by the Cell Counting Kit-8 assay, and results showed that ATR could significantly inhibit the proliferation of A549 cells. Apoptosis was detected by Annexin V-FITC/PI staining, and apoptosis rate and mitochondrial membrane potential were detected by flow cytometry. Results showed that the effect of ATR on the apoptosis of A549 cells was negatively correlated with the change in mitochondrial membrane potential. Western blot analysis showed that ATR regulated apoptosis induced by mitogen-activated protein kinase, signal transducer and activator of transcription 3, and nuclear factor kappa B signaling pathways. Analyses of reactive oxygen species (ROS), cell cycle, and cell migration showed that ATR induced intracellular ROS accumulation as an initiation signal to induce cell cycle arrest regulated by the AKT signaling pathway and cell migration inhibition regulated by the Wnt signaling pathway. Results showed that ATR can inhibit cell proliferation, induce cell apoptosis, induce cell cycle arrest, and inhibit the migration of A549 cells (p < 0.05 was considered statistically significant, * p < 0.05, ** p < 0.01 and *** p < 0.001).
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Affiliation(s)
- Tong Zhang
- College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (T.Z.); (Y.-N.L.); (J.-L.C.); (H.X.)
| | - Shu-Mei Li
- Hemodialysis Center, Daqing Oilfield General Hospital, Daqing 163001, China;
| | - Yan-Nan Li
- College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (T.Z.); (Y.-N.L.); (J.-L.C.); (H.X.)
| | - Jing-Long Cao
- College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (T.Z.); (Y.-N.L.); (J.-L.C.); (H.X.)
| | - Hui Xue
- College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (T.Z.); (Y.-N.L.); (J.-L.C.); (H.X.)
| | - Chang Wang
- College of Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China
- Correspondence: (C.W.); (C.-H.J.)
| | - Cheng-Hao Jin
- College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (T.Z.); (Y.-N.L.); (J.-L.C.); (H.X.)
- National Coarse Cereals Engineering Research Center, Daqing 163319, China
- College of Food Science & Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
- Correspondence: (C.W.); (C.-H.J.)
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18
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Zhang Q, Zhao Y, Zhang M, Zhang Y, Ji H, Shen L. Recent advances in research on vine tea, a potential and functional herbal tea with dihydromyricetin and myricetin as major bioactive compounds. J Pharm Anal 2021; 11:555-563. [PMID: 34765268 PMCID: PMC8572699 DOI: 10.1016/j.jpha.2020.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 10/07/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023] Open
Abstract
Vine tea has been used as an herbal tea by several ethnic minorities for hundreds of years in China. Flavonoids, a kind of indispensable component in a variety of nutraceutical, pharmaceutical and cosmetic applications, are identified to be the major metabolites and bioactive ingredients in vine tea. Interestingly, vine tea exhibits a wide range of significant bioactivities including anti-oxidant, anti-inflammatory, anti-tumor, antidiabetic, neuroprotective and other activities, but no toxicity. These bioactivities, to some extent, enrich the understanding about the role of vine tea in disease prevention and therapy. The health benefits of vine tea, particularly dihydromyricetin and myricetin, are widely investigated. However, there is currently no comprehensive review available on vine tea. Therefore, this report summarizes the most recent studies investigating bioactive constituents, pharmacological effects and possible mechanisms of vine tea, which will provide a better understanding about the health benefits and preclinical assessment of novel application of vine tea.
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Affiliation(s)
- Qili Zhang
- College of Life Sciences, Shandong University of Technology, Zibo, Shandong 255000, China
| | - Yanfang Zhao
- College of Life Sciences, Shandong University of Technology, Zibo, Shandong 255000, China
| | - Meiyan Zhang
- Department of Pharmacy, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Yalu Zhang
- Department of Pharmacy, The Affiliated Hospital of Jining Medical College, Jining, Shandong 272100, China
| | - Hongfang Ji
- College of Life Sciences, Shandong University of Technology, Zibo, Shandong 255000, China
| | - Liang Shen
- College of Life Sciences, Shandong University of Technology, Zibo, Shandong 255000, China
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Effects of microwave irradiation on the expression of key flavonoid biosynthetic enzyme genes and the accumulation of flavonoid products in Fagopyrum tataricum sprouts. J Cereal Sci 2021. [DOI: 10.1016/j.jcs.2021.103275] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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20
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Zhang P, Wang W, Mao M, Gao R, Shi W, Li D, Calderone R, Sui B, Tian X, Meng X. Similarities and Differences: A Comparative Review of the Molecular Mechanisms and Effectors of NAFLD and AFLD. Front Physiol 2021; 12:710285. [PMID: 34393826 PMCID: PMC8362097 DOI: 10.3389/fphys.2021.710285] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/29/2021] [Indexed: 12/12/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) and alcoholic fatty liver disease (AFLD) are the most prevalent metabolic liver diseases globally. Due to the complex pathogenic mechanisms of NAFLD and AFLD, no specific drugs were approved at present. Lipid accumulation, oxidative stress, insulin resistance, inflammation, and dietary habits are all closely related to the pathogenesis of NAFLD and AFLD. However, the mechanism that promotes disease progression has not been fully elucidated. Meanwhile, the gut microbiota and their metabolites also play an important role in the pathogenesis and development of NAFLD and AFLD. This article comparatively reviewed the shared and specific signaling pathways, clinical trials, and potential intervention effectors of NAFLD and AFLD, revealing their similarities and differences. By comparing the shared and specific molecular regulatory mechanisms, this paper provides mutual reference strategies for preventing and treating NAFLD, AFLD, and related metabolic diseases. Furthermore, it provides enlightenment for discovering novel therapies of safe and effective drugs targeting the metabolic liver disease.
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Affiliation(s)
- Pengyi Zhang
- School of Sports and Health, Shandong Sport University, Jinan, China
| | - Weiya Wang
- School of Sports and Health, Shandong Sport University, Jinan, China.,Shandong Academy of Pharmaceutical Science, Jinan, China
| | - Min Mao
- Department of Allied Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Ruolin Gao
- School of Sports and Health, Shandong Sport University, Jinan, China
| | - Wenting Shi
- School of Sports and Health, Shandong Sport University, Jinan, China
| | - Dongmei Li
- Department of Microbiology and Immunology, Georgetown University Medical Center, Washington, DC, United States
| | - Richard Calderone
- Department of Microbiology and Immunology, Georgetown University Medical Center, Washington, DC, United States
| | - Bo Sui
- School of Sports and Health, Shandong Sport University, Jinan, China
| | - Xuewen Tian
- School of Sports and Health, Shandong Sport University, Jinan, China
| | - Xiangjing Meng
- Shandong Academy of Pharmaceutical Science, Jinan, China
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21
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Long HZ, Cheng Y, Zhou ZW, Luo HY, Wen DD, Gao LC. PI3K/AKT Signal Pathway: A Target of Natural Products in the Prevention and Treatment of Alzheimer's Disease and Parkinson's Disease. Front Pharmacol 2021; 12:648636. [PMID: 33935751 PMCID: PMC8082498 DOI: 10.3389/fphar.2021.648636] [Citation(s) in RCA: 154] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 03/08/2021] [Indexed: 12/12/2022] Open
Abstract
Alzheimer’s disease (AD) and Parkinson’s disease (PD) are two typical neurodegenerative diseases that increased with aging. With the emergence of aging population, the health problem and economic burden caused by the two diseases also increase. Phosphatidylinositol 3-kinases/protein kinase B (PI3K/AKT) signaling pathway regulates signal transduction and biological processes such as cell proliferation, apoptosis and metabolism. According to reports, it regulates neurotoxicity and mediates the survival of neurons through different substrates such as forkhead box protein Os (FoxOs), glycogen synthase kinase-3β (GSK-3β), and caspase-9. Accumulating evidences indicate that some natural products can play a neuroprotective role by activating PI3K/AKT pathway, providing an effective resource for the discovery of potential therapeutic drugs. This article reviews the relationship between AKT signaling pathway and AD and PD, and discusses the potential natural products based on the PI3K/AKT signaling pathway to treat two diseases in recent years, hoping to provide guidance and reference for this field. Further development of Chinese herbal medicine is needed to treat these two diseases.
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Affiliation(s)
- Hui-Zhi Long
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China.,Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang, China
| | - Yan Cheng
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China.,Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang, China
| | - Zi-Wei Zhou
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China.,Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang, China
| | - Hong-Yu Luo
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China.,Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang, China
| | - Dan-Dan Wen
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China
| | - Li-Chen Gao
- Department of Pharmacy, Cancer Institute, Phase I Clinical Trial Centre, Changsha Central Hospital Affiliated to University of South China, School of Pharmacy, University of South China, Changsha, China.,Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang, China
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Dihydromyricetin Acts as a Potential Redox Balance Mediator in Cancer Chemoprevention. Mediators Inflamm 2021; 2021:6692579. [PMID: 33776577 PMCID: PMC7979283 DOI: 10.1155/2021/6692579] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/11/2021] [Accepted: 02/27/2021] [Indexed: 01/10/2023] Open
Abstract
Dihydromyricetin (DHM) is a flavonoid extracted from the leaves and stems of the edible plant Ampelopsis grossedentata that has been used for Chinese Traditional Medicine. It has attracted considerable attention from consumers due to its beneficial properties including anticancer, antioxidative, and anti-inflammatory activities. Continuous oxidative stress caused by intracellular redox imbalance can lead to chronic inflammation, which is intimately associated with the initiation, promotion, and progression of cancer. DHM is considered a potential redox regulator for chronic disease prevention, and its biological activities are abundantly evaluated by using diverse cell and animal models. However, clinical investigations are still scanty. This review summarizes the current potential chemopreventive effects of DHM, including its properties such as anticancer, antioxidative, and anti-inflammatory activities, and further discusses the underlying molecular mechanisms of DHM in cancer chemoprevention by targeting redox balance and influencing the gut microbiota.
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Wang S, Ge F, Cai T, Qi S, Qi Z. [Dihydromyricetin inhibits proliferation and migration of gastric cancer cells through regulating Akt/STAT3 signaling pathways and HMGB1 expression]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:87-92. [PMID: 33509758 DOI: 10.12122/j.issn.1673-4254.2021.01.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
OBJECTIVE To investigate the inhibitory effects of dihydromyricetin on the proliferation and migration of gastric cancer BGC-823 cells and explore the molecular mechanisms. METHODS BGC-823 cells in routine culture were treated with different concentrations of dihydromyricetin (0, 40, 60, 80, 100, and 120 μg/mL) for 24 h, and the changes in cell viability were detected using CCK-8 assay; colony forming assay and Transwell assay were performed to assess the changes in colonyforming and migration abilities of the cells, respectively. The levels of MMP-2 and MMP-9 in the treated cells were determined using ELISA, and Western blotting was used to detect the expressions of E-cadherin, N-cadherin, cyclin D1, cyclin E1, HSP70 and HMGB1 and the phosphorylation levels of Akt and Stat3. RESULTS CCK-8 assay showed that dihydromyricetin treatment dose-dependently inhibited the viability of BGC-823 cells (P < 0.05). Treatment with dihydromyricetin obviously suppressed the proliferation and migration of BGC-823 cells, significantly reduced the expression levels of cyclin D1, cyclin E1 and Ncadherin, enhanced E-cadherin expression, inhibited the phosphorylation of Akt and stat3, and downregulated HMGB1 expression in the cells. The results of ELISA demonstrated significantly lowered levels of MMP-2 and MMP-9 in dihydromyricetin-treated cells. CONCLUSIONS Dihydromyricetin inhibits the proliferation and migration of BGC-823 cells through suppressing the activation of Akt/stat3 signaling pathways and HMGB1 expression.
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Affiliation(s)
- Shengnan Wang
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China.,Anhui Provincial Key Laboratory of Active Biological Macro-molecules, Wannan Medical College, Wuhu 241002, China
| | - Fei Ge
- School of Pharmacy, Wannan Medical College, Wuhu 241002, China
| | - Tianyu Cai
- Anhui Provincial Key Laboratory of Active Biological Macro-molecules, Wannan Medical College, Wuhu 241002, China.,School of Clinical Medicine, Wannan Medical College, Wuhu 241002, China
| | - Shimei Qi
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China.,Anhui Provincial Key Laboratory of Active Biological Macro-molecules, Wannan Medical College, Wuhu 241002, China
| | - Zhilin Qi
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China.,Anhui Provincial Key Laboratory of Active Biological Macro-molecules, Wannan Medical College, Wuhu 241002, China
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Govindarajulu M, Ramesh S, Neel L, Fabbrini M, Buabeid M, Fujihashi A, Dwyer D, Lynd T, Shah K, Mohanakumar KP, Smith F, Moore T, Dhanasekaran M. Nutraceutical based SIRT3 activators as therapeutic targets in Alzheimer's disease. Neurochem Int 2021; 144:104958. [PMID: 33444675 DOI: 10.1016/j.neuint.2021.104958] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 12/21/2020] [Accepted: 01/06/2021] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease, and its incidence is increasing worldwide with increased lifespan. Currently, there is no effective treatment to cure or prevent the progression of AD, which indicates the need to develop novel therapeutic targets and agents. Sirtuins, especially SIRT3, a mitochondrial deacetylase, are NAD-dependent histone deacetylases involved in aging and longevity. Accumulating evidence indicates that SIRT3 dysfunction is strongly associated with pathologies of AD, hence, therapeutic modulation of SIRT3 activity may be a novel application to ameliorate the pathologies of AD. Natural products commonly used in traditional medicine have wide utility and appear to have therapeutic benefits for the treatment of neurodegenerative diseases such as AD. The present review summarizes the currently available natural SIRT3 activators and their potentially neuroprotective molecular mechanisms of action that make them a promising agent in the treatment and management of neurodegenerative diseases such as AD.
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Affiliation(s)
- Manoj Govindarajulu
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Sindhu Ramesh
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Logan Neel
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Mary Fabbrini
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Manal Buabeid
- Clinical Pharmacy Department, College of Pharmacy and Health Sciences, Ajman University, United Arab Emirates
| | - Ayaka Fujihashi
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Darby Dwyer
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Tyler Lynd
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Karishma Shah
- Department of Ophthalmology, D.Y. Patil Medical College and Research Hospital, Mumbai, India
| | | | - Forrest Smith
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Timothy Moore
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Muralikrishnan Dhanasekaran
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA.
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25
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Li W, Xiao H. Dihydromyricetin Alleviates High Glucose-Induced Oxidative Stress and Apoptosis in Human Retinal Pigment Epithelial Cells by Downregulating miR-34a Expression. Diabetes Metab Syndr Obes 2021; 14:387-397. [PMID: 33536772 PMCID: PMC7850407 DOI: 10.2147/dmso.s290633] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 12/12/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Diabetic retinopathy (DR) is one of the most common microvascular complications of diabetes mellitus, which leads to neuronal and vascular dysfunction in the retina with a final outcome of complete loss of vision. The aim of the present study was to investigate the effects of dihydromyricetin (DHM), a natural flavanol compound, on diabetic retinopathy (DR) and identify its potential mechanisms. METHODS Retinal pigment epithelial cell line (ARPE-19) treated with high glucose (HG) was used to simulate the DR model in vitro. After treatment with different concentrations of DHM, the cell viability, production of reactive oxygen species (ROS) and the levels of oxidative stress-related markers in the in vitro model were detected using corresponding kits. Cell apoptosis was determined using terminal-deoxynucleotidyl transferase mediated nick end labeling (TUNEL) staining, and the expression of apoptotic proteins was examined using Western blot analysis. Subsequently, microRNA (miR)-34a expression was measured by reverse transcription-quantitative PCR (RT-qPCR). The levels of oxidative stress and apoptosis were evaluated after miR-34a overexpression. RESULTS Results indicated that DHM dose-dependently elevated the decreased cell viability induced by HG. Moreover, the content of ROS was significantly reduced in HG-stimulated ARPE-19 cells, accompanied by enhanced activities of superoxide dismutase (SOD) and catalase (CAT) antioxidases, as well as concentration of glutathione (GSH). Furthermore, remarkably decreased apoptosis of ARPE-19 cells induced by HG was observed following DHM intervention. Importantly, HG stimulation notably upregulated miR-34a expression, which was reversed by DHM treatment. Importantly, the inhibitory effects of DHM on HG-induced oxidative stress and apoptosis of ARPE-19 cells were restored following miR-34a overexpression. CONCLUSION Taken together, this work demonstrated that DHM exerts protective effects on HG-induced oxidative stress and apoptotic damage in ARPE-19 cells via inhibition of miR-34a expression, providing a promising therapeutic agent for the treatment of DR.
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Affiliation(s)
- Wenjun Li
- Department of Ophthalmology, NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin300134, People’s Republic of China
| | - Hongxia Xiao
- Department of Ophthalmology, Jingmen No. 2 People’s Hospital, Jingmen448000, People’s Republic of China
- Correspondence: Hongxia Xiao Jingmen No. 2 People’s Hospital, 39 Xiangshan Avenue, Jingmen, Hubei448000, People’s Republic of China Email
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26
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Fan X, Zeng Y, Fan Z, Cui L, Song W, Wu Q, Gao Y, Yang D, Mao X, Zeng B, Zhang M, Ni Q, Li Y, Wang T, Li D, Yang M. Dihydromyricetin promotes longevity and activates the transcription factors FOXO and AOP in Drosophila. Aging (Albany NY) 2020; 13:460-476. [PMID: 33291074 PMCID: PMC7835053 DOI: 10.18632/aging.202156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 07/20/2020] [Indexed: 12/23/2022]
Abstract
Drugs or compounds have been shown to promote longevity in various approaches. We used Drosophila to explore novel natural compounds can be applied to anti-aging. Here we reported that a flavonoid named Dihydromyricetin can increase stress that tolerance and lipid levels, slow down gut dysfunction and extend Drosophila lifespan. Dihydromyricetin can also lessen pERK and pAKT signaling, consequently activating FOXO and AOP to modulate longevity. Our results suggested that DHM could be used as an effective compound for anti-aging intervention, which could likely be applied to both mammals and humans.
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Affiliation(s)
- Xiaolan Fan
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yao Zeng
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Ziqiang Fan
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Liang Cui
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Wenhao Song
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Qi Wu
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Yue Gao
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Deying Yang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xueping Mao
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Bo Zeng
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mingwang Zhang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qingyong Ni
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yan Li
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Tao Wang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Diyan Li
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mingyao Yang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
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Zhang J, Zheng S, Wang S, Liu Q, Xu S. Cadmium-induced oxidative stress promotes apoptosis and necrosis through the regulation of the miR-216a-PI3K/AKT axis in common carp lymphocytes and antagonized by selenium. CHEMOSPHERE 2020; 258:127341. [PMID: 32563067 DOI: 10.1016/j.chemosphere.2020.127341] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/26/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd) is a primary environmental pollutant which causes the immune dysfunction of aquatic animals. MicroRNAs (miRNAs) play a key role in programmed necrosis and apoptosis of immune organs. Selenium (Se), known as an important element, can antagonize Cd toxicity in birds, but the impact of Se on common carps (Cyprinus carpio) has not been reported. To investigate the Cd-induced immunotoxicity mechanism mediated by miR-216a in splenic lymphocytes of common carp and antagonized by Se, we extracted lymphocytes from the spleen and divided them into control group, Se group (10-6 mol/L of Na2SeO3), Se + Cd group and Cd group (4 × 10-5 mol/L of CdCl2). After 6 h of incubation, AO/EB staining, Flow cytometry, qPCR and Western blot were performed. The results showed that Cd exposure caused the apoptosis (BAX, Bcl-2, Caspase 3, Caspase 9) and programmed necrosis (RIP, RIP3, MLKL) in lymphocytes, increased the expression of CYP enzymes, glycometabolism-related enzymes and production of ROS, while irritated the oxidative stress (MDA, SOD, CAT and GSH-PX), upregulated the expression of miR-216a which attenuated the levels of PI3K. However, those variations were apparently mitigated in the Se + Cd group. In short, we have proven that Cd activates oxidative stress and miR-216a-PI3K/AKT axis disorder, thus promoting apoptosis and necrosis in lymphocytes. Moreover, Se can antagonize Cd-triggered apoptosis and necrosis in lymphocytes.
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Affiliation(s)
- Jiaqi Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shufang Zheng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shengchen Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Qingqing Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, PR China.
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28
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Guo L, Tan K, Luo Q, Bai X. Dihydromyricetin promotes autophagy and attenuates renal interstitial fibrosis by regulating miR-155-5p/PTEN signaling in diabetic nephropathy. Bosn J Basic Med Sci 2020; 20:372-380. [PMID: 31668144 PMCID: PMC7416184 DOI: 10.17305/bjbms.2019.4410] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/17/2019] [Indexed: 12/19/2022] Open
Abstract
Diabetic nephropathy (DN) is the most common complication of diabetes and is prone to kidney failure. Dihydromyricetin (DHM) has been reported to have a variety of pharmacological activities. This study aims to explore the effect of DHM on DN and the underlying molecular mechanism. An in vivo DN rat model was established. The degree of renal interstitial fibrosis (RIF) was detected by hematoxylin-eosin (HE) staining, Masson's trichrome staining, and immunohistochemistry (IHC). In vitro, NRK-52E cells were divided into four groups: normal glucose (NG), high glucose (HG), HG+DHM, and HG+rapamycin (autophagy inhibitor). The levels of autophagy- and fibrosis-related proteins were analyzed by western blotting. The expression of miR-155-5p and phosphatase and tensin homolog deleted on chromosome ten (PTEN) and their relationship were assessed by quantitative reverse transcription (qRT)-PCR and dual luciferase reporter gene assay. Our results showed that RIF was increased in DN rat model and in HG-induced NRK-52E cells. DHM treatment attenuated the increased RIF and also increased autophagy. MiR-155-5p expression was increased, while PTEN expression was decreased in DN rat and cell model, and DHM reversed both effects. Dual luciferase assay showed that PTEN was the target gene of miR-155-5p. DHM inhibited HG-induced fibrosis and promoted autophagy by inhibiting miR-155-5p expression in NRK-52E cells. In addition, DHM promoted autophagy by inhibiting the PI3K/AKT/mTOR signaling pathway. In conclusion, DHM promotes autophagy and attenuates RIF by regulating the miR-155-5p/PTEN signaling and PI3K/AKT/mTOR signaling pathway in DN.
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Affiliation(s)
- Liming Guo
- Department of Nephrology, HwaMei Hospital, University of Chinese Academy of Sciences, Zhejiang, China
| | - Kuibi Tan
- Department of Nephrology, HwaMei Hospital, University of Chinese Academy of Sciences, Zhejiang, China
| | - Qun Luo
- Department of Nephrology, HwaMei Hospital, University of Chinese Academy of Sciences, Zhejiang, China
| | - Xu Bai
- Department of Nephrology, HwaMei Hospital, University of Chinese Academy of Sciences, Zhejiang, China
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29
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Silva J, Yu X, Moradian R, Folk C, Spatz MH, Kim P, Bhatti AA, Davies DL, Liang J. Dihydromyricetin Protects the Liver via Changes in Lipid Metabolism and Enhanced Ethanol Metabolism. Alcohol Clin Exp Res 2020; 44:1046-1060. [PMID: 32267550 PMCID: PMC7211127 DOI: 10.1111/acer.14326] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022]
Abstract
Background Excess alcohol (ethanol, EtOH) consumption is a significant cause of chronic liver disease, accounting for nearly half of the cirrhosis‐associated deaths in the United States. EtOH‐induced liver toxicity is linked to EtOH metabolism and its associated increase in proinflammatory cytokines, oxidative stress, and the subsequent activation of Kupffer cells. Dihydromyricetin (DHM), a bioflavonoid isolated from Hovenia dulcis, can reduce EtOH intoxication and potentially protect against chemical‐induced liver injuries. But there remains a paucity of information regarding the effects of DHM on EtOH metabolism and liver protection. As such, the current study tests the hypothesis that DHM supplementation enhances EtOH metabolism and reduces EtOH‐mediated lipid dysregulation, thus promoting hepatocellular health. Methods The hepatoprotective effect of DHM (5 and 10 mg/kg; intraperitoneal injection) was evaluated using male C57BL/6J mice and a forced drinking ad libitum EtOH feeding model and HepG2/VL‐17A hepatoblastoma cell models. EtOH‐mediated lipid accumulation and DHM effects against lipid deposits were determined via H&E stains, triglyceride measurements, and intracellular lipid dyes. Protein expression of phosphorylated/total proteins and serum and hepatic cytokines was determined via Western blot and protein array. Total NAD+/NADH Assay of liver homogenates was used to detect NAD + levels. Results DHM reduced liver steatosis, liver triglycerides, and liver injury markers in mice chronically fed EtOH. DHM treatment resulted in increased activation of AMPK and downstream targets, carnitine palmitoyltransferase (CPT)‐1a, and acetyl CoA carboxylase (ACC)‐1. DHM induced expression of EtOH‐metabolizing enzymes and reduced EtOH and acetaldehyde concentrations, effects that may be partly explained by changes in NAD+. Furthermore, DHM reduced the expression of proinflammatory cytokines and chemokines in sera and cell models. Conclusion In total, these findings support the utility of DHM as a dietary supplement to reduce EtOH‐induced liver injury via changes in lipid metabolism, enhancement of EtOH metabolism, and suppressing inflammation responses to promote liver health.
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Affiliation(s)
- Joshua Silva
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Xin Yu
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Renita Moradian
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Carson Folk
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Maximilian H Spatz
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Phoebe Kim
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Adil A Bhatti
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Daryl L Davies
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Jing Liang
- From the, Titus Family Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, California
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30
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Tong H, Zhang X, Tan L, Jin R, Huang S, Li X. Multitarget and promising role of dihydromyricetin in the treatment of metabolic diseases. Eur J Pharmacol 2019; 870:172888. [PMID: 31866404 DOI: 10.1016/j.ejphar.2019.172888] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/01/2019] [Accepted: 12/18/2019] [Indexed: 12/30/2022]
Abstract
Dihydromyricetin (DMY or DHM), also known as ampelopsin, is the main natural flavonol compound extracted from the plant Ampelopsis grossedentata (Hand. -Mazz) W.T. Wang. In recent years, accumulating studies have been conducted to explore the extensive biological functions of DMY, including antitumor, anti-inflammation, organ-protective, and metabolic regulation effects. DMY acts as a potential preventive or therapeutic agent in treating multiple diseases, such as diabetes mellitus, atherosclerosis, nonalcoholic fatty liver disease and osteoporosis. This review article summarizes the preventive and therapeutic potential of DMY in multiple metabolic diseases and the main signaling pathways in which DMY participates to offer a comprehensive understanding and guidance for future studies.
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Affiliation(s)
- Haihui Tong
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jie Fang Avenue, Wuhan, Hubei Province, 430022, China.
| | - Xuejun Zhang
- Department of Orthopedics, The People's Hospital of China Three Gorges University, First People's Hospital of Yichang, No. 4 Hudi Street, Yichang, Hubei Province, 443000, China.
| | - Lingfang Tan
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jie Fang Avenue, Wuhan, Hubei Province, 430022, China.
| | - Runming Jin
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jie Fang Avenue, Wuhan, Hubei Province, 430022, China.
| | - Shilong Huang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1095 Jie Fang Avenue, Wuhan, Hubei Province, 430030, China.
| | - Xin Li
- Department of Pediatrics, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jie Fang Avenue, Wuhan, Hubei Province, 430022, China.
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31
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Martínez-Coria H, Mendoza-Rojas MX, Arrieta-Cruz I, López-Valdés HE. Preclinical Research of Dihydromyricetin for Brain Aging and Neurodegenerative Diseases. Front Pharmacol 2019; 10:1334. [PMID: 31780947 PMCID: PMC6859532 DOI: 10.3389/fphar.2019.01334] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 10/18/2019] [Indexed: 12/11/2022] Open
Abstract
Brain aging and neurodegenerative diseases share the hallmarks of slow and progressive loss of neuronal cells. Flavonoids, a subgroup of polyphenols, are broadly present in food and beverage and numerous studies have suggested that it could be useful for preventing or treating neurodegenerative diseases in humans. Dihydromyricetin (DHM) is one of the main flavonoids of some Asian medicinal plants that are used to treat diverse illness. The effects of DHM have been studied in different in vitro systems of oxidative damage and neuroinflammation, as well as in animal models of several neurodegenerative diseases, such as Alzheimer’s disease, Parkinson’s disease, and Huntington’s disease. Here we analyzed the most important effects of DHM, including its antioxidant, anti-inflammatory, and neuroprotective effects, as well as its ability to restore GABA neurotransmission and improve motor and cognitive behavior. We propose new areas of research that might contribute to a better understanding of the mechanism of action of this flavonoid, which could help develop a new therapy for aging and age-related brain diseases.
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Affiliation(s)
- Hilda Martínez-Coria
- Division de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México.,Laboratorio Experimental de Enfermedades Neurodegenerativas, UNAM-INNyN, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez",Ciudad de México, Mexico
| | - Martha X Mendoza-Rojas
- Unidad Periférica de Neurociencias, UNAM-INNyN, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez",Ciudad de México, Mexico
| | - Isabel Arrieta-Cruz
- Departamento de Investigación Básica, Instituto Nacional de Geriatría,Ciudad de México, Mexico
| | - Héctor E López-Valdés
- Division de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México.,Unidad Periférica de Neurociencias, UNAM-INNyN, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez",Ciudad de México, Mexico
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32
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Zhang S, Xue R, Hu R. The neuroprotective effect and action mechanism of polyphenols in diabetes mellitus-related cognitive dysfunction. Eur J Nutr 2019; 59:1295-1311. [PMID: 31598747 DOI: 10.1007/s00394-019-02078-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 08/10/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Diabetes mellitus (DM) is a complex and prevalent metabolic disorder worldwide. Strong evidence has emerged that DM is a risk factor for the accelerated rate of cognitive decline and the development of dementia. Though traditional pharmaceutical agents are efficient for the management of DM and DM-related cognitive decrement, long-term use of these drugs are along with undesired side effects. Therefore, tremendous studies have focused on the therapeutic benefits of natural compounds at present. Ample evidence exists to prove that polyphenols are capable to modulate diabetic neuropathy with minimal toxicity and adverse effects. PURPOSE To describe the benefits and mechanisms of polyphenols on DM-induced cognitive dysfunction. In this review, we introduce an updated overview of associations between DM and cognitive dysfunction. The risk factors as well as pathological and molecular mechanisms of DM-induced cognitive dysfunction are summarized. More importantly, many active polyphenols that possess preventive and therapeutic effects on DM-induced cognitive dysfunction and the potential signaling pathways involved in the action are highlighted. CONCLUSIONS The therapeutic effects of polyphenols on DM-related cognitive dysfunction pave a novel way for the management of diabetic encephalopathy.
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Affiliation(s)
- Shenshen Zhang
- College of Public Health, Zhengzhou University, Zhengzhou, China.
| | - Ran Xue
- College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Ruizhe Hu
- School of Physical Education (Main Campus), Zhengzhou University, Zhengzhou, China.
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Zhang X, Wang L, Peng L, Tian X, Qiu X, Cao H, Yang Q, Liao R, Yan F. Dihydromyricetin protects HUVECs of oxidative damage induced by sodium nitroprusside through activating PI3K/Akt/FoxO3a signalling pathway. J Cell Mol Med 2019; 23:4829-4838. [PMID: 31111658 PMCID: PMC6584490 DOI: 10.1111/jcmm.14406] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/21/2019] [Accepted: 04/26/2019] [Indexed: 12/27/2022] Open
Abstract
The damage of vascular endothelial cells induced by oxidative stress plays an important role in the pathogenesis of atherosclerosis. Dihydromyricetin (DMY) is considered as a natural antioxidant. However, the mechanism of DMY on endothelial cell injury induced by oxidative stress remains unclear. In this study, we found that DMY could reduce the oxidative damage of HUVECs induced by sodium nitroprusside (SNP), HUVECs pre-treated with DMY suppressed SNP-induced apoptosis by reduced ROS overproduction of intracellular, decreased MDA level and elevated the superoxide dismutase activity. Meanwhile, we found that DMY could promote the expression of phosphorylated FoxO3a and Akt, and affect the nuclear localization of FoxO3a, when treated with the PI3K inhibitor LY294002, the effect of DMY was blocked. These data suggest that DMY protects HUVECs from oxidative stress by activating PI3K/Akt/FoxO3a signalling pathway. Therefore, DMY may have great therapeutic potential as a new drug for atherosclerosis.
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Affiliation(s)
- Xiaoying Zhang
- Department of Pharmacology, School of MedicineXizang Minzu UniversityXianyangChina
| | - Lifang Wang
- School of Medical ScienceJinan UniversityGuangzhouChina
| | - Lizhi Peng
- Department of PharmacyThe Seventh Affiliated Hospital of Sun Yat‐Sen UniversityShenzhenChina
| | - Xiaoying Tian
- School of Medical ScienceJinan UniversityGuangzhouChina
| | - Xiaoyuan Qiu
- School of Medical ScienceJinan UniversityGuangzhouChina
| | - Huan Cao
- School of Medical ScienceJinan UniversityGuangzhouChina
| | - Qiaohong Yang
- School of Medical ScienceJinan UniversityGuangzhouChina
| | - Rifang Liao
- Department of PharmacySun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouChina
| | - Fengxia Yan
- School of Medical ScienceJinan UniversityGuangzhouChina
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Wu JZ, Ardah M, Haikal C, Svanbergsson A, Diepenbroek M, Vaikath NN, Li W, Wang ZY, Outeiro TF, El-Agnaf OM, Li JY. Dihydromyricetin and Salvianolic acid B inhibit alpha-synuclein aggregation and enhance chaperone-mediated autophagy. Transl Neurodegener 2019; 8:18. [PMID: 31223479 PMCID: PMC6570948 DOI: 10.1186/s40035-019-0159-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/24/2019] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Progressive accumulation of α-synuclein is a key step in the pathological development of Parkinson's disease. Impaired protein degradation and increased levels of α-synuclein may trigger a pathological aggregation in vitro and in vivo. The chaperone-mediated autophagy (CMA) pathway is involved in the intracellular degradation processes of α-synuclein. Dysfunction of the CMA pathway impairs α-synuclein degradation and causes cytotoxicity. RESULTS In the present study, we investigated the effects on the CMA pathway and α-synuclein aggregation using bioactive ingredients (Dihydromyricetin (DHM) and Salvianolic acid B (Sal B)) extracted from natural medicinal plants. In both cell-free and cellular models of α-synuclein aggregation, after administration of DHM and Sal B, we observed significant inhibition of α-synuclein accumulation and aggregation. Cells were co-transfected with a C-terminal modified α-synuclein (SynT) and synphilin-1, and then treated with DHM (10 μM) and Sal B (50 μM) 16 hours after transfection; levels of α-synuclein aggregation decreased significantly (68% for DHM and 75% for Sal B). Concomitantly, we detected increased levels of LAMP-1 (a marker of lysosomal homeostasis) and LAMP-2A (a key marker of CMA). Immunofluorescence analyses showed increased colocalization between LAMP-1 and LAMP-2A with α-synuclein inclusions after treatment with DHM and Sal B. We also found increased levels of LAMP-1 and LAMP-2A both in vitro and in vivo, along with decreased levels of α-synuclein. Moreover, DHM and Sal B treatments exhibited anti-inflammatory activities, preventing astroglia- and microglia-mediated neuroinflammation in BAC-α-syn-GFP transgenic mice. CONCLUSIONS Our data indicate that DHM and Sal B are effective in modulating α-synuclein accumulation and aggregate formation and augmenting activation of CMA, holding potential for the treatment of Parkinson's disease.
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Affiliation(s)
- Jia-Zhen Wu
- Institute of Neuroscience, College of Life and Health Sciences, Northeastern University, Shenyang, Liaoning China
- Key Laboratory of Maternal-Fetal Medicine of Liaoning Province and Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Shengjing Hospital of China Medical University, Shenyang, China
| | - Mustafa Ardah
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, PO Box 17666, Al-Ain, United Arab Emirates
| | - Caroline Haikal
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
| | - Alexander Svanbergsson
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
| | - Meike Diepenbroek
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
| | - Nishant N. Vaikath
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
- Neurological Disorders Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Education City, Qatar Foundation, P.O. Box 5825, Doha, Qatar
| | - Wen Li
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
| | - Zhan-You Wang
- Institute of Heath Sciences, China Medical University, 110112 Shenyang, People’s Republic of China
| | - Tiago F. Outeiro
- Department of Experimental Neurodegeneration, Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37073 Göttingen, Germany
- Max Planck Institute for Experimental Medicine, Göttingen, Germany
| | - Omar M. El-Agnaf
- Neurological Disorders Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Education City, Qatar Foundation, P.O. Box 5825, Doha, Qatar
| | - Jia-Yi Li
- Institute of Neuroscience, College of Life and Health Sciences, Northeastern University, Shenyang, Liaoning China
- Neural Plasticity and Repair Unit, Wallenberg Neuroscience Center, Department of Experimental Medical Science, BMC A10, 221 84 Lund, Sweden
- Institute of Heath Sciences, China Medical University, 110112 Shenyang, People’s Republic of China
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Li H, Yu F, Sun X, Xu L, Miu J, Xiao P. Dihydromyricetin ameliorates memory impairment induced by acute sleep deprivation. Eur J Pharmacol 2019; 853:220-228. [PMID: 30876981 DOI: 10.1016/j.ejphar.2019.03.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 03/07/2019] [Accepted: 03/11/2019] [Indexed: 01/15/2023]
Abstract
Dihydromyricetin (DHM), the major bioactive flavonoid ingredient extracted from the leaves of Ampelopsis grossedentata (Hand.-Mazz) W.T. Wang displays multiple pharmacological activities, including oxidation resistance, anti-tumour properties and free radical scavenging capacities. However, the role of DHM in sleep deprivation (SD)-induced memory impairments and its underlying molecular mechanisms are unclear. The aim of the present study was to evaluate the effects of DHM on oxidative stress and its role in ameliorating memory impairment induced by acute SD. DHM (100, 50, 25 mg/kg) and melatonin (10 mg/kg) were administered to mice via oral gavage. The open field test was used to evaluate motor function. Spatial learning and memory were assessed using the Morris water maze task. Malondialdehyde, glutathione, and glutathione disulfide levels, as well as superoxide dismutase enzyme activity, were assessed to determine the level of oxidative stress. In addition, we employed quantitative real-time PCR assays to examine the gene expression of 29 key proteins, including protein kinase A (PKA), cAMP response element binding protein (CREB), and adcy1. The levels of proteins including those of GABABRS, GABAARα5, GluR1, BDNF and PSD95, were detected by western blotting. The results showed that DHM significantly attenuated SD-induced spatial learning and memory impairments (P < 0.01). The possible underlying mechanisms of DHM may be attributed to its ability to reduce oxidative stress and restore synaptic plasticity.
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Affiliation(s)
- Hongxiang Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 151 Malianwa North Road, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, 151 Malianwa North Road, Beijing 100193, China.
| | - Fan Yu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 151 Malianwa North Road, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, 151 Malianwa North Road, Beijing 100193, China.
| | - Xiaoyuan Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 151 Malianwa North Road, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, 151 Malianwa North Road, Beijing 100193, China.
| | - Lijia Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 151 Malianwa North Road, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, 151 Malianwa North Road, Beijing 100193, China.
| | - Jianhua Miu
- Guangxi Institute of Medicinal Plant Development, Nanning, 189 Changgang Road, Nanning 520023, China.
| | - Peigen Xiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 151 Malianwa North Road, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, 151 Malianwa North Road, Beijing 100193, China.
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Ali K, Ahmed B, Ansari SM, Saquib Q, Al-Khedhairy AA, Dwivedi S, Alshaeri M, Khan MS, Musarrat J. Comparative in situ ROS mediated killing of bacteria with bulk analogue, Eucalyptus leaf extract (ELE)-capped and bare surface copper oxide nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:747-758. [PMID: 30948112 DOI: 10.1016/j.msec.2019.03.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 02/23/2019] [Accepted: 03/04/2019] [Indexed: 10/27/2022]
Abstract
This study demonstrates a simple one-pot green method for biosynthesis of terpenoids encapsulated copper oxide nanoparticles (CuONPs) using aqueous leaf extract of Eucalyptus globulus (ELE), as reducing, dispersing, and stabilizing agent. Indeed, the greater attachment and internalization of ELE-CuONPs in Gram-positive and -negative biofilm producing clinical bacterial isolates validated the hypothesis that terpenoids encapsulated CuONPs are more stable and effective antibacterial and antibiofilm agent vis-à-vis commercially available nano and micro sized analogues. Gas chromatography-mass spectroscopy (GC-MS) analysis of pristine ELE identified 17 types of terpenoids based on their mass-to-charge (m/z) ratios. Amongst them four bioactive terpenoids viz. terpineols, 2,6-octadienal-3,7-dimethyl, benzamidophenyl-4-benzoate and β-eudesmol were found associated with the CuONPs as ELE-cap, and most likely involved in the nucleation and stabilization of ELE-CuONPs. Further, the Fourier transformed infrared (FTIR) analysis of ELE-CuONPs also implicated other functional biomolecules like proteins, sugars, alkenes, etc. with ELE terpenoids corona. Flow cytometric (FCM) data exhibited significantly enhanced intracellular uptake propensity of terpenoids encapsulated ELE-CuONPs and accumulation of intracellular reactive oxygen species (ROS), which ensued killing of planktonic cells of extended spectrum β-lactamases (ESβL) producing Escherichia coli-336 (E. coli-336), Pseudomonas aeruginosa-621 (P. aeruginosa-621) and methicillin-resistant Staphylococcus aureus-1 (MRSA-1) clinical isolates compared to the bare surface commercial nano-CuO and bulk sized CuO. The study for the first-time demonstrated the (i) differential bio-nano interface activities due to ELE surface and varied cell wall composition of test bacterial isolates, (ii) antibacterial effect and biofilm inhibition due to disruption of proteins involved in adhesion and biofilm formation triggered by CuONPs induced intracellular oxidative stress, and (iii) indigenous terpenoids-capped bio-inspired CuONPs are more stable and effective antibacterial and antibiofilm agent as compared with commercially available nano-CuO and bulk-CuO.
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Affiliation(s)
- Khursheed Ali
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Bilal Ahmed
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Sabiha M Ansari
- Department of Botany & Microbiology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Quaiser Saquib
- Zoology Department, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulaziz A Al-Khedhairy
- Zoology Department, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Sourabh Dwivedi
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Majed Alshaeri
- Faculty of Science, Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohd Saghir Khan
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Javed Musarrat
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India; School of Biosciences and Biotechnology, Baba Ghulam Shah Badshah University, Rajouri, Jammu & Kashmir, India.
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Le L, Fu H, Lv Q, Bai X, Zhao Y, Xiang J, Jiang B, Hu K, Chen S. The protective effects of the native flavanone flavanomarein on neuronal cells damaged by 6-OHDA. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 53:193-204. [PMID: 30668399 DOI: 10.1016/j.phymed.2018.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/28/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Flavanomarein is the main component of Coreopsis tinctoria Nutt. (C. tinctoria), which is a globally well-known flower tea that has a distinct flavor and many beneficial health effects, such as antioxidant activities. We aimed to explore the effect of flavanomarein on a 6-hydroxydopamine (6-OHDA)-lesioned cell model of oxidative stress. METHODS In this study, we used 6-OHDA-lesioned PC12 cells and primary cortical neurons to investigate the protective effects of flavanomarein and its potential mechanism. RESULTS The results indicated that pretreatment with flavanomarein (25, 50, or 100 µM for 24 h) significantly increased the cell viability, reduced the lactate dehydrogenase (LDH) release and improved the mitochondrial membrane potential (∆Ψm) and mitochondrial impairment. Additionally, flavanomarein markedly reduced the gene expression of tumor necrosis factor (TNF)-α and protein kinase C ζ (PKC-ζ), the nuclear translocation of p65, and the levels of p-AMPK-α and acetyl-p53. Flavanomarein also elevated the gene expression of P85α, PKC-β1, and Bcl-2, the protein expression of Sirt1 and ICAD, and the phosphorylation level of AKT. CONCLUSIONS Together, these results suggest that flavanomarein protects PC12 cells and primary cortical neurons from 6-OHDA-induced neurotoxicity by upregulating the PI3K/AKT signaling pathway and attenuating the nuclear factor kappa B (NF-κB) signaling pathway. Therefore, our study provides evidence that may aid in the development of a potential compound against 6-OHDA toxicity.
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Affiliation(s)
- Liang Le
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; Post-doctoral Scientific Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Hui Fu
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Qiuyue Lv
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Xue Bai
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Ying Zhao
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Jiamei Xiang
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Baoping Jiang
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
| | - Keping Hu
- Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Shilin Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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Sachdeva R, Fleming T, Schumacher D, Homberg S, Stilz K, Mohr F, Wagner AH, Tsvilovskyy V, Mathar I, Freichel M. Methylglyoxal evokes acute Ca 2+ transients in distinct cell types and increases agonist-evoked Ca 2+ entry in endothelial cells via CRAC channels. Cell Calcium 2019; 78:66-75. [PMID: 30658323 DOI: 10.1016/j.ceca.2019.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 01/08/2019] [Accepted: 01/08/2019] [Indexed: 12/21/2022]
Abstract
Methylglyoxal (MG) is a by-product of glucose metabolism and its accumulation has been linked to the development of diabetic complications such as retinopathy and nephropathy by affecting multiple signalling pathways. However, its influence on the intracellular Ca2+ homeostasis and particularly Ca2+ entry, which has been reported to be mediated via TRPA1 channels in DRG neurons, has not been studied in much detail in other cell types. In this study, we report the consequences of acute and long-term MG application on intracellular Ca2+ levels in endothelial cells. We showed that acute MG application doesn't evoke any instantaneous changes in the intracellular Ca2+ concentration in immortalized mouse cardiac endothelial cells (MCECs) and murine microvascular endothelial cells (muMECs). In contrast, an MG-induced rise in intracellular Ca2+ level was observed in primary mouse mesangial cells within 30 s, indicating that the modulation of Ca2+ homeostasis by MG is strictly cell type specific. The formation of the MG-derived advanced glycation end product (AGE) MG-H1 was found to be time and concentration-dependent in MCECs. Likewise, MG pre-incubation for 6 h increased the angiotensin II-evoked Ca2+ entry in MCECs and muMECs which was abrogated by inhibition of Calcium release activated calcium (CRAC) channels with GSK-7975A, but unaffected by an inhibitor specific to TRPA1 channels. Quantitative PCR analysis revealed that MG pre-treatment did not affect expression of the genes encoding the angiotensin receptors AT1R (Agtr 1a & Agtr 1b), Trpa1 nor Orai1, Orai2, Orai3, Stim1, Stim2 and Saraf which operate as constituents or regulators of CRAC channels and store-operated Ca2+ entry (SOCE) in other cell types. Together, our results show that long-term MG stimulation leads to the formation of glycation end products, which facilitates the agonist-evoked Ca2+ entry in endothelial cells, and this could be a new pathway that might lead to MG-evoked vasoregression observed in diabetic vasculopathies.
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Affiliation(s)
- Robin Sachdeva
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Thomas Fleming
- Department of Medicine I and Clinical Chemistry, Heidelberg University Hospital, Germany; German Center for Diabetes Research (DZD), Germany
| | - Dagmar Schumacher
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Sarah Homberg
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Kathrin Stilz
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Franziska Mohr
- Institute of Physiology and Pathophysiology, Division of Cardiovascular Physiology, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Andreas H Wagner
- Institute of Physiology and Pathophysiology, Division of Cardiovascular Physiology, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Volodymyr Tsvilovskyy
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Ilka Mathar
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany
| | - Marc Freichel
- Institute of Pharmacology, Heidelberg University, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany.
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Qiu P, Dong Y, Zhu T, Luo YY, Kang XJ, Pang MX, Li HZ, Xu H, Gu C, Pan SH, Du WF, Ge WH. Semen hoveniae extract ameliorates alcohol-induced chronic liver damage in rats via modulation of the abnormalities of gut-liver axis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 52:40-50. [PMID: 30599911 DOI: 10.1016/j.phymed.2018.09.209] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 09/12/2018] [Accepted: 09/21/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Hovenia dulcis Thunb. is considered as a traditional herbal medicine that has been used in the treatment for ethanol-induced liver disease for centuries. Recently, substantial studies demonstrated that Semen hoveniae extract (SHE) not only suppressed the hepatic steatosis caused by chronic ethanol exposure, but also inhibited lipopolysaccharide-stimulated inflammatory responses. Nevertheless, the underlying molecular mechanisms largely remained elusive. AIM To determine the hepatoprotective effects of SHE on ethanol-triggered liver damage and further elucidate its potential mechanisms. METHODS In the present study, the Sprague-Dawley rats were fed with the Lieber-DeCarli diet containing alcohol or isocaloric maltose dextrin as control diet with or without SHE (300 and 600 mg/kg/d bw) for 8 weeks. The levels of serum biomarkers (ALT, AST and LDH) and LPS were detected by biochemical assay kits and endotoxin detection LAL kit, respectively. The histopathological changes of liver and intestinal tissues were observed by hematoxylin and eosin (H&E) staining and Transmission electron microscope (TEM). The expressions of CD14, TLR4, MyD88, NF-κB, Iκ-B, P-Iκ-B and TNF-α in liver, and ZO-1 and occludin in intestine were determined by western blot. The faecal microbial composition was determined by16S rRNA Gene Sequencing Analysis. RESULTS Biochemical and histopathological analysis revealed that SHE significantly alleviated the lipid deposition and inflammation response in liver induced by ethanol. SHE remarkably inhibited the TLR4 pathway and its downstream inflammatory mediators, and up-regulated the expressions of ZO-1 and occludin in the intestine. The further investigations suggested SHE dramatically reversed ethanol-induced alterations in the intestinal microbial flora and decreased the generation of gut-derived endotoxin. CONCLUSION In summary, SHE probably modulated abnormalities of gut-liver axis and inhibited TLR4-associated inflammatory mediators activation to exert its hepatoprotective properties. These findings suggested that SHE as a traditional therapeutic options which may play an essential role in protecting against the chronic ethanol-triggered liver injury.
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Affiliation(s)
- Ping Qiu
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Yu Dong
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China
| | - Tao Zhu
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Yun-Yun Luo
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Xian-Jie Kang
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Min-Xia Pang
- Zhejiang Chinese Medical University, Hangzhou 310053, China; Zhejiang University of Technology, Hangzhou 310014, China
| | - Huan-Zhou Li
- Department of Traditional Chinese Medicine, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Hao Xu
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Chao Gu
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Su-Hua Pan
- Department of Traditional Chinese Medicine, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wei-Feng Du
- Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Wei-Hong Ge
- Zhejiang Chinese Medical University, Hangzhou 310053, China.
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Zhang J, Chen Y, Luo H, Sun L, Xu M, Yu J, Zhou Q, Meng G, Yang S. Recent Update on the Pharmacological Effects and Mechanisms of Dihydromyricetin. Front Pharmacol 2018; 9:1204. [PMID: 30410442 PMCID: PMC6209623 DOI: 10.3389/fphar.2018.01204] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/02/2018] [Indexed: 12/19/2022] Open
Abstract
As the most abundant natural flavonoid in rattan tea, dihydromyricetin (DMY) has shown a wide range of pharmacological effects. In addition to the general characteristics of flavonoids, DMY has the effects of cardioprotection, anti-diabetes, hepatoprotection, neuroprotection, anti-tumor, and dermatoprotection. DMY was also applied for the treatment of bacterial infection, osteoporosis, asthma, kidney injury, nephrotoxicity and so on. These effects to some extent enrich the understanding about the role of DMY in disease prevention and therapy. However, to date, we still have no outlined knowledge about the detailed mechanism of DMY, which might be related to anti-oxidation and anti-inflammation. And the detailed mechanisms may be associated with several different molecules involved in cellular apoptosis, oxidative stress, and inflammation, such as AMP-activated protein kinase (AMPK), mitogen-activated protein kinase (MAPK), protein kinase B (Akt), nuclear factor-κB (NF-κB), nuclear factor E2-related factor 2 (Nrf2), ATP-binding cassette transporter A1 (ABCA1), peroxisome proliferator-activated receptor-γ (PPARγ) and so on. Here, we summarized the current pharmacological developments of DMY as well as possible mechanisms, aiming to push the understanding about the protective role of DMY as well as its preclinical assessment of novel application.
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Affiliation(s)
- Jingyao Zhang
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China.,Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Yun Chen
- Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Huiqin Luo
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China.,Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Linlin Sun
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China.,Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Mengting Xu
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China.,Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Jin Yu
- Department of Pharmacology, School of Pharmacy, Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong, China
| | - Qigang Zhou
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing, China
| | - Guoliang Meng
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China
| | - Shengju Yang
- Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China
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Li X, Li Y, Wang Z. Structural properties of lecithin based reverse hexagonal (H II) liquid crystals and in vitro release of dihydromyricetin. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2017.1417134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xuepeng Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
| | - Yang Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
| | - Zhongni Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
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Chen Y, Luo HQ, Sun LL, Xu MT, Yu J, Liu LL, Zhang JY, Wang YQ, Wang HX, Bao XF, Meng GL. Dihydromyricetin Attenuates Myocardial Hypertrophy Induced by Transverse Aortic Constriction via Oxidative Stress Inhibition and SIRT3 Pathway Enhancement. Int J Mol Sci 2018; 19:E2592. [PMID: 30200365 PMCID: PMC6164359 DOI: 10.3390/ijms19092592] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/28/2018] [Accepted: 08/29/2018] [Indexed: 12/12/2022] Open
Abstract
Dihydromyricetin (DMY), one of the flavonoids in vine tea, exerts several pharmacological actions. However, it is not clear whether DMY has a protective effect on pressure overload-induced myocardial hypertrophy. In the present study, male C57BL/6 mice aging 8⁻10 weeks were subjected to transverse aortic constriction (TAC) surgery after 2 weeks of DMY (250 mg/kg/day) intragastric administration. DMY was given for another 2 weeks after surgery. Blood pressure, myocardial structure, cardiomyocyte cross-sectional area, cardiac function, and cardiac index were observed. The level of oxidative stress in the myocardium was assessed with dihydroethidium staining. Our results showed that DMY had no significant effect on the blood pressure. DMY decreased inter ventricular septum and left ventricular posterior wall thickness, relative wall thickness, cardiomyocyte cross-sectional areas, as well as cardiac index after TAC. DMY pretreatment also significantly reduced arterial natriuretic peptide (ANP), brain natriuretic peptide (BNP) mRNA and protein expressions, decreased reactive oxygen species production and malondialdehyde (MDA) level, while increased total antioxidant capacity (T-AOC), activity of superoxide dismutase (SOD), expression of sirtuin 3 (SIRT3), forkhead-box-protein 3a (FOXO3a) and SOD2, and SIRT3 activity in the myocardium of mice after TAC. Taken together, DMY ameliorated TAC induced myocardial hypertrophy in mice related to oxidative stress inhibition and SIRT3 pathway enhancement.
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Affiliation(s)
- Yun Chen
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
- School of Medicine, Nantong University, Nantong 226001, China.
| | - Hui-Qin Luo
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Lin-Lin Sun
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Meng-Ting Xu
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Jin Yu
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Lu-Lu Liu
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Jing-Yao Zhang
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Yu-Qin Wang
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Hong-Xia Wang
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Xiao-Feng Bao
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
| | - Guo-Liang Meng
- Department of Pharmacology, School of Pharmacy and Key Laboratory of Inflammation and Molecular Drug Target of Jiangsu Province, Nantong University, Nantong 226001, China.
- School of Medicine, Nantong University, Nantong 226001, China.
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Liu CM, Yang W, Ma JQ, Yang HX, Feng ZJ, Sun JM, Cheng C, Jiang H. Dihydromyricetin Inhibits Lead-Induced Cognitive Impairments and Inflammation by the Adenosine 5'-Monophosphate-Activated Protein Kinase Pathway in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7975-7982. [PMID: 29975840 DOI: 10.1021/acs.jafc.8b02433] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dihydromyricetin (DHM), a natural flavonoid derived from the medicinal and edible plant Ampelopsis grossedentata, exhibits antioxidant, antiapoptosis, antitumor, and anti-inflammatory bioactivities. This study evaluated the effects of DHM on Pb-induced neurotoxicity and explored the underlying mechanisms. DHM significantly ameliorated behavioral impairments of Pb-induced mice. It decreased the levels of lipid peroxidation and protein carbonyl and increased the activities of superoxide dismutase and catalase in the brains. DHM suppressed Pb-induced apoptosis, as indicated by the decreased levels of Bax and cleaved caspase-3. DHM also decreased inflammatory cytokines in the brains of Pb-treated mice. DHM decreased amyloid-beta (Aβ) level and nuclear factor-κB nuclear translocation. Moreover, DHM induced the adenosine 5'-monophosphate-activated protein kinase (AMPK) phosphorylation and inhibited the activation of p38, Toll-like receptor 4, myeloid differentiation factor 88, and glycogen synthase kinase-3. Collectively, this is the first report indicating that DHM could improve Pb-induced cognitive functional impairment by preventing oxidative stress, apoptosis, and inflammation and that the protective effect was mediated partly through the AMPK pathway.
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Affiliation(s)
- Chan-Min Liu
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Wei Yang
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Jie-Qiong Ma
- School of Chemistry and Pharmaceutica Engineering , Sichuan University of Science and Engineering , Xuyuan road , 643000 , Zigong City , Sichuan Province , PR China
| | - Hui-Xin Yang
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Zhao-Jun Feng
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Jian-Mei Sun
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Chao Cheng
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
| | - Hong Jiang
- School of Life Science , Jiangsu Normal University , No.101, Shanghai Road , Tangshan New Area, 221116 , Xuzhou City , Jiangsu Province , PR China
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Suh KS, Chon S, Choi EM. Protective effects of piceatannol on methylglyoxal-induced cytotoxicity in MC3T3-E1 osteoblastic cells. Free Radic Res 2018; 52:712-723. [DOI: 10.1080/10715762.2018.1467010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kwang Sik Suh
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
| | - Suk Chon
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
| | - Eun Mi Choi
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
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Muhammad U, Zhu X, Lu Z, Han J, Sun J, Tayyaba S, Abbasi B, Ali Siyal F, Dhama K, Saqib J. Effects of Extraction Variables on Pharmacological Activities of Vine Tea Extract (Ampelopsis grossedentata). INT J PHARMACOL 2018. [DOI: 10.3923/ijp.2018.495.505] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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Chu J, Wang X, Bi H, Li L, Ren M, Wang J. Dihydromyricetin relieves rheumatoid arthritis symptoms and suppresses expression of pro-inflammatory cytokines via the activation of Nrf2 pathway in rheumatoid arthritis model. Int Immunopharmacol 2018; 59:174-180. [PMID: 29656207 DOI: 10.1016/j.intimp.2018.04.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/09/2018] [Accepted: 04/04/2018] [Indexed: 12/17/2022]
Abstract
Rheumatoid arthritis (RA) is a systemic inflammatory and autoimmune disease. In this research, we estimated the protective effects of Dihydromyricetin (DMY) on RA induced by Complete Freund's Adjuvant (CFA). We found that DMY effectively relieved rheumatoid arthritis symptoms, such as body weight change, paw swelling and rheumatoid arthritis scores. In addition, we also observed that DMY significantly lowered the immune organ indexes (including thymus and spleen) and exhibited the anti-inflammatory effect in CFA-induced rheumatoid arthritis. The results demonstrated that the increased expression levels of interleukin-1β (IL-1β), interleukin-6(IL-6), tumor necrosis factor-α (TNF-α) were significantly inhibited by DMY. Furthermore, the key inflammatory mediator, cyclooxygenase-2 (COX-2) was markedly lowered after treatment with DMY. A mechanistic study indicated that DMY could up-regulate the down-regulation levels of the mRNA and protein of Nrf2, HO-1 and NQO1. Moreover, the Nrf2 activation of DMY was abolished by Nrf2 inhibitor brusatol. Thus, DMY inhibits the expressions of pro-inflammatory cytokines via activating Nrf2 pathway in RA model, which suggests that DMY has potential for further investigation as a candidate anti-arthritic agent in future.
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Affiliation(s)
- Jianguo Chu
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China
| | - Xiujun Wang
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China
| | - Huanjie Bi
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China
| | - Lifeng Li
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China
| | - Mingguang Ren
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China
| | - Jingwei Wang
- Tangshan GongRen Hospital, Tangshan, Hebei, PR China.
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Dihydromyricetin protects human umbilical vein endothelial cells from injury through ERK and Akt mediated Nrf2/HO-1 signaling pathway. Apoptosis 2018; 22:1013-1024. [PMID: 28612103 DOI: 10.1007/s10495-017-1381-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Atherosclerosis-related cardiovascular disease is the predominant cause of death worldwide. Ox-LDL-induced vascular endothelial cell injury is a major factor in the pathogenesis of atherosclerosis. Dihydromyricetin (DMY) is a flavonoid extracted from vine tea that exerts multiple pharmacological activities, including cardio-protective, anti-tumor, and anti-oxidative effects. However, it is unreported that DMY shows protective effects on ox-LDL-induced endothelial cell injury. In this study, we used an ox-LDL injured human umbilical vein endothelial cell (HUVEC) in vitro model to explore the protective effects and mechanism of DMY. HUVECs were pretreatment with DMY and then exposed to ox-LDL, the cell viability was measured. Then, the anti-oxidative enzymes were tested by commercial kits and intracellular reactive oxygen species (ROS) was measured by flow cytometry, cell apoptosis was determined by Annexin-V/PI assay and apoptosis-related proteins were detected by western blot. Our results showed that DMY pretreatment provided cytoprotective effects by suppressing ox-LDL-induced endothelial cell apoptosis, mitochondrial membrane depolarization, caspase-3 activation, and modulation of oxidative enzymes, thereby inhibiting ROS generation. The anti-oxidative and anti-apoptotic effects of DMY were abrogated by the transfection of Nrf2 siRNAs and HO-1 inhibitor ZnPP. Furthermore, DMY might activate the Nrf2/HO-1 pathway through activation of the Akt and ERK1/2 pathways, as shown by the inhibition of Nrf2/HO-1 signaling by the inhibitors PD98059 or LY294002 and the transfection of ERK, Akt siRNAs. In this study, DMY protects HUVECs from ox-LDL-induced oxidative injury by activating Akt and ERK1/2, which subsequently activates Nrf2/HO-1 signaling, thereby up-regulating antioxidant enzymes and anti-apoptotic proteins.
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48
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Chen Y, Lv L, Pi H, Qin W, Chen J, Guo D, Lin J, Chi X, Jiang Z, Yang H, Jiang Y. Dihydromyricetin protects against liver ischemia/reperfusion induced apoptosis via activation of FOXO3a-mediated autophagy. Oncotarget 2018; 7:76508-76522. [PMID: 27793014 PMCID: PMC5363527 DOI: 10.18632/oncotarget.12894] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/15/2016] [Indexed: 12/29/2022] Open
Abstract
Liver ischemia and reperfusion (I/R) injury is characterized by defective liver autophagy accompanied by alterations to the endogenous defense system. Dihydromyricetin (DHM) is a natural flavonoid that demonstrates a wide range of physiological functions, and has been implicated as a regulator of autophagy. This study investigates the protective effects of DHM pretreatment on liver injury caused by ischemia/reperfusion (I/R) and elucidates the potential mechanism of DHM-mediated protection. Mice were subjected to 60 minutes of ischemia followed by 5 hours of reperfusion. DHM (100 mg/kg bw/day) or the vehicle was administered daily by gavage 7 days before ischemia and immediately before reperfusion. In this study, DHM markedly decreased serum aminotransferase activity and inhibited liver I/R -stimulated apoptosis. Moreover, DHM exerted hepatoprotective effects by upregulating mRNA levels of various essential autophagy-related genes including ATG5, ATG12, BECN1, and LC3. Autophagy inhibitor chloroquine or Atg5 knockdown blocked DHM -mediated elevation in liver function. Specifically, DHM significantly increased FOXO3a expression, and enhanced FOXO3a nuclear translocation and Ser588 phosphorylation modification. Importantly, the inhibition of FOXO3a with FOXO3a-siRNA in mice decreased DHM-induced autophagy-related genes and diminished the protective effects of DHM against liver I/R injury. In summary, these findings identify DHM as a novel hepatoprotective small molecule by elevating FOXO3a expression and nuclear translocation, stimulating autophagy-related genes and suppressing liver I/R-induced apoptosis, suggesting FOXO3a may have therapeutic value in liver cell protection in liver I/R injury.
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Affiliation(s)
- Yongbiao Chen
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Lizhi Lv
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Huifeng Pi
- Department of Occupational Health, Third Military Medical University, Chongqing, China
| | - Weijia Qin
- The 517th Hospital of PLA, Xinzhou, Shanxi, China
| | - Jianwei Chen
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Dengfang Guo
- Department of General Surgery, Mindong Hospital of Fujian Medical University, Fuan, Fujian, China
| | - Jianyu Lin
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Xiaobing Chi
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Zhelong Jiang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Hejun Yang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
| | - Yi Jiang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital of PLA, Fuzhou, Fujian, China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian, China
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49
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Liu S, Ai Q, Feng K, Li Y, Liu X. The cardioprotective effect of dihydromyricetin prevents ischemia-reperfusion-induced apoptosis in vivo and in vitro via the PI3K/Akt and HIF-1α signaling pathways. Apoptosis 2018; 21:1366-1385. [PMID: 27738772 DOI: 10.1007/s10495-016-1306-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Reperfusion therapy is widely used to treat acute myocardial infarction (AMI). However, further injury to the heart induced by rapidly initiating reperfusion is often encountered in clinical practice. A lack of pharmacological strategies in clinics limits the prognosis of patients with myocardial ischemia-reperfusion injury (MIRI). Dihydromyricetin (DMY) is one of the most abundant components in vine tea, commonly known as the tender stems and leaves of Ampelopsis grossedentata. The aim of this study was to evaluate the cardioprotection of DMY against myocardial ischemia-reperfusion (I/R) injury and to further investigate the underlying mechanism. An I/R injury was induced by left anterior descending coronary artery occlusion in adult male rats in vivo and a hypoxia-reoxygenation (H/R) injury in H9c2 cardiomyocytes in vitro. We found that DMY pretreatment provided significant protection against I/R-induced injury, including enhanced antioxidant capacity and inhibited apoptosis in vivo and in vitro. This effect correlated with the activation of the PI3K/Akt and HIF-1α signaling pathways. Conversely, blocking Akt activation with the PI3K inhibitor LY294002 effectively suppressed the protective effects of DMY against I/R-induced injury. In addition, the PI3K inhibitor partially blocked the effects of DMY on the upregulation of Bcl-2, Bcl-xl, procaspase-3, -8, and -9 protein expression and the downregulation of HIF-1α, Bnip3, Bax, Cyt-c, cleaved caspase-3, -8, and -9 protein expression. Collectively, these results showed that DMY decreased the apoptosis and necrosis by I/R treatment, and PI3K/Akt and HIF-1α plays a crucial role in protection during this process. These observations indicate that DMY has the potential to exert cardioprotective effects against I/R injury and the results might be important for the clinical efficacy of AMI treatment.
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Affiliation(s)
- Shasha Liu
- Pharmacy Department, Xiangtan Central Hospital, No. 120, Heping Road, Yuhu District, Xiangtan, 411100, People's Republic of China
| | - Qidi Ai
- School of Pharmaceutical Science, Hunan University of Chinese Medicine, Changsha, 410208, People's Republic of China
| | - Kai Feng
- Oral Surgery, Dalian Stomatological Hospital, Dalian, 116021, People's Republic of China
| | - Yubing Li
- Pharmacy Department, Dalian (Municipal) Friendship Hospital, Dalian, 116001, People's Republic of China
| | - Xiang Liu
- Pharmacy Department, Xiangtan Central Hospital, No. 120, Heping Road, Yuhu District, Xiangtan, 411100, People's Republic of China.
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Patel SS, Udayabanu M. Effect of natural products on diabetes associated neurological disorders. Rev Neurosci 2018; 28:271-293. [PMID: 28030360 DOI: 10.1515/revneuro-2016-0038] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 10/21/2016] [Indexed: 12/15/2022]
Abstract
Diabetes mellitus, a metabolic disorder, is associated with neurological complications such as depression, anxiety, hypolocomotion, cognitive dysfunction, phobias, anorexia, stroke, pain, etc. Traditional system of medicine is long known for its efficient management of diabetes. The current review discusses the scope of some common medicinal herbs as well as secondary metabolites with a special focus on diabetes-mediated central nervous system complications. Literatures suggest that natural products reduce diabetes-mediated neurological complications partly by reducing oxidative stress and/or inflammation or apoptosis in certain brain regions. Natural products are known to modulate diabetes-mediated alterations in the level of acetylcholinesterase, choline acetyltransferase, monoamine oxidase, serotonin receptors, muscarinic receptors, insulin receptor, nerve growth factor, brain-derived neurotrophic factor, and neuropeptide in brain. Further, there are several natural products reported to manage diabetic complications with unknown mechanism. In conclusion, medicinal plants or their secondary metabolites have a wide scope and possess therapeutic potential to effectively manage neurological complications associated with chronic diabetes.
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