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Xia T, Zhu R. Multiple molecular and cellular mechanisms of the antitumour effect of dihydromyricetin (Review). Biomed Rep 2024; 20:82. [PMID: 38628627 PMCID: PMC11019658 DOI: 10.3892/br.2024.1769] [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: 12/18/2023] [Accepted: 03/13/2024] [Indexed: 04/19/2024] Open
Abstract
Dihydromyricetin (DHM) is a natural flavonoid compound with multiple antitumour effects, including inhibition of proliferation, promotion of apoptosis, inhibition of invasion and migration, clearance of reactive oxygen species (ROS) and induction of autophagy. For example, DHM can effectively block the progression of the tumour cell cycle and inhibit cell proliferation. In different types of cancer cells, DHM can regulate the PI3K/Akt pathway, mTOR, and NF-κB pathway components, such as p53, and endoplasmic reticulum stress can alter the accumulation of ROS or induce autophagy to promote the apoptosis of tumour cells. In addition, when DHM is used in combination with various known chemotherapy drugs, such as paclitaxel, nedaplatin, doxorubicin, oxaliplatin and vinblastine, it can increase the sensitivity of tumour cells to DHM and increase the therapeutic effect of chemotherapy drugs. In the present review, the multiple molecular and cellular mechanisms underlying the antitumour effect of DHM, as well as its ability to increase the effects of various traditional antitumour drugs were summarized. Through the present review, it is expected by the authors to draw attention to the potential of DHM as an antitumour drug and provide valuable references for the clinical translation of DHM research and the development of related treatment strategies.
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Affiliation(s)
- Tian Xia
- National Clinical Research Center for Child Health, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310052, P.R. China
| | - Runzhi Zhu
- National Clinical Research Center for Child Health, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310052, P.R. 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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Ampelopsin induces MDA-MB-231 cell cycle arrest through cyclin B1-mediated PI3K/AKT/mTOR pathway in vitro and in vivo. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2023; 73:75-90. [PMID: 36692465 DOI: 10.2478/acph-2023-0005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/31/2022] [Indexed: 01/25/2023]
Abstract
Breast cancer is one of the most common malignant tumors in women and it is the most frequently diagnosed cancer in the world. Ampelopsin (AMP) is a purified component from the root of Ampelopsis grossedentata. It is reported that AMP could significantly inhibit the proliferation of breast cancer cells. However, the antitumor mechanism against breast cancer has not yet been fully elucidated. The purpose of this work was to study the role of AMP against breast cancer MDA-MB-231 cells and to further investigate the underlying mechanism. PI3K/AKT/mTOR plays a very important role in tumor cell growth and proliferation and we hypothesize that AMP may inhibit this pathway. In the present work, the results showed that AMP could significantly inhibit the growth of breast cancer MDA-MB-231 cells in vitro and in vivo. In addition, treatment with AMP decreased the levels of PI3K, AKT and mTOR, as well as cyclin B1 expression, followed by p53/p21 pathway activation to arrest the cell cycle at G2/M. Moreover, it demonstrated a positive association between cyclin B1 and PI3K/AKT/mTOR levels. Importantly, this pathway was found to be regulated by cyclin B1 in MDA-MB-231 cells treated with AMP. Also, it was observed that cyclin B1 overexpression attenuated cell apoptosis and weakened the inhibitory effects of AMP on cell proliferation. Together, AMP could inhibit breast cancer MDA-MB-231 cell proliferation in vitro and in vivo, due to cell cycle arrest at G2/M by inactivating PI3K/AKT/mTOR pathway regulated by cyclin B1.
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Li Y, Zhou Y, Wang M, Lin X, Zhang Y, Laurent I, Zhong Y, Li J. Ampelopsin Inhibits Breast Cancer Cell Growth through Mitochondrial Apoptosis Pathway. Biol Pharm Bull 2021; 44:1738-1745. [PMID: 34470980 DOI: 10.1248/bpb.b21-00470] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ampelopsin, a flavonoid with a wide variety of biological activities, has been proposed to be a potent antitumor agent. However, the mechanism by which Ampelopsin shows anti-breast cancer activity remains unclear. Therefore, this study will explore the mechanism of Ampelopsin's anti-breast cancer activity by culturing MDA-MB-231 and MCF-7 breast cancer cells. Cell Counting Kit-8 (CCK-8) method and plate cloning method were used to detect the proliferation inhibition of breast cancer cells. Fluorescence microscopy was used to detect mitochondrial membrane potential (MMP). 2',7'-Dichlorodihydrofluorescein diacetate (DCFH-DA) method was used to determine the content of intracellular reactive oxygen species (ROS). Hoechst 33258 staining was used to detect the apoptotic morphological changes. Transmission electron microscope was used to observe the mitochondrial structure. Western blot was used to detect the protein expression of Bax and Bcl-2. The results showed that Ampelopsin could significantly inhibit the proliferation of breast cancer cells, and promote cells apoptosis. In addition, the occurrence of apoptosis in breast cancer cells was associated with mitochondrial dysfunction, including the loss of mitochondrial membrane potential, the production of large amounts of reactive oxygen species, and the up-regulation of Bax/Bcl-2 expression. In conclusion, Ampelopsin-induced mitochondria damage leads to loss of mitochondria membrane potential, overproduction of ROS and activation of Bax, increasing mitochondria membrane permeability and ultimately inducing breast cell apoptosis. These findings provided a new perspective on the role of Ampelopsin in breast cancer prevention and treatment.
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Affiliation(s)
- Yue Li
- Department of Nutrition and Food Hygiene, School of Public Health and Management, Chongqing Medical University.,Wanzhou District Center for Disease Control and Prevention
| | - Yong Zhou
- Department of Clinic Nutrition, People's Hospital of Chongqing Banan District
| | - Miaoran Wang
- Department of Nutrition and Food Hygiene, School of Public Health and Management, Chongqing Medical University
| | - Xiaojing Lin
- Department of Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, The First Affiliated Hospital of Chongqing Medical University
| | - Yunqi Zhang
- Department of Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, The First Affiliated Hospital of Chongqing Medical University
| | - Irakoze Laurent
- Department of Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, The First Affiliated Hospital of Chongqing Medical University
| | - Ying Zhong
- Department of Nutrition and Food Hygiene, School of Public Health and Management, Chongqing Medical University
| | - Jibin Li
- Department of Nutrition and Food Hygiene, School of Public Health and Management, Chongqing Medical University
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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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Guo Y, Zhu H, Weng M, Zhang H, Wang C, Sun L. CC-223, NSC781406, and BGT226 Exerts a Cytotoxic Effect Against Pancreatic Cancer Cells via mTOR Signaling. Front Pharmacol 2020; 11:580407. [PMID: 33343350 PMCID: PMC7741184 DOI: 10.3389/fphar.2020.580407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/29/2020] [Indexed: 12/28/2022] Open
Abstract
The mTOR signaling pathway is abnormally activated in pancreatic cancer and is related to tumor glucose metabolism. However, its specific regulation mechanism is still unclear. Therefore, this study aims to investigate whether Sestrin2 affects the glucose metabolism of pancreatic cancer by modulating mTOR signal and then affects its biological behavior. We have observed that l-leucine can promote the proliferation of pancreatic cancer cells and increase the expression of Sestrin2 and p-mTOR proteins. In order to further study the role of Sestrin2 and mTOR signaling in pancreatic cancer, we conducted Sestrin2 overexpression and mTOR pharmacological inhibition experiments. We found that Sestrin2 overexpression can increase glycolysis of pancreatic cancer cells and promote their proliferation. This effect can be eliminated by mTOR inhibitors. Finally, we found that Sestrin2 knockdown could inhibit the growth of pancreatic cancer in vivo. In conclusion, these findings suggest that Sestrin2 may promote the occurrence and development of pancreatic cancer through mTOR signaling.
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Affiliation(s)
- Yangyang Guo
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
| | - Hengyue Zhu
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
| | - Min Weng
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
| | - Hewei Zhang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
| | - Cheng Wang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
| | - Linxiao Sun
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, China
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ERASLAN E, TANYELİ A, GÜLER MC. Ampelopsin, Deneysel Böbrek İskemi Reperfüzyon Hasarında Oksidatif Stresi ve İnflamatuvar Sitokin Seviyelerini Azaltmaktadır. DICLE MEDICAL JOURNAL 2020. [DOI: 10.5798/dicletip.755767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Camara AB, Brandao IA. The Role of Vitamin D and Sunlight Incidence in Cancer. Anticancer Agents Med Chem 2020; 19:1418-1436. [PMID: 30864510 DOI: 10.2174/1389557519666190312123212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/19/2018] [Accepted: 02/13/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Vitamin D (VD) deficiency affects individuals of different ages in many countries. VD deficiency may be related to several diseases, including cancer. OBJECTIVE This study aimed to review the relationship between VD deficiency and cancer. METHODS We describe the proteins involved in cancer pathogenesis and how those proteins can be influenced by VD deficiency. We also investigated a relationship between cancer death rate and solar radiation. RESULTS We found an increased bladder cancer, breast cancer, colon-rectum cancer, lung cancer, oesophagus cancer, oral cancer, ovary cancer, pancreas cancer, skin cancer and stomach cancer death rate in countries with low sunlight. It was also observed that amyloid precursor protein, ryanodine receptor, mammalian target of rapamycin complex 1, and receptor for advanced glycation end products are associated with a worse prognosis in cancer. While the Klotho protein and VD receptor are associated with a better prognosis in the disease. Nfr2 is associated with both worse and better prognosis in cancer. CONCLUSION The literature suggests that VD deficiency might be involved in cancer progression. According to sunlight data, we can conclude that countries with low average sunlight have high cancers death rate. New studies involving transcriptional and genomic data in combination with VD measurement in long-term experiments are required to establish new relationships between VD and cancer.
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Affiliation(s)
- Alice B Camara
- Department of Biophysics and Pharmacology, Bioscience Center, Federal University of Rio Grande do Norte, 59064-741, Natal/RN, Brazil
| | - Igor A Brandao
- Metrópole Digital Institute, Federal University of Rio Grande do Norte, 59078-970, Natal/RN, Brazil
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Yang F, Yang YH, Zeng WH. The Inhibition of Cell Growth Through the EGFR/ERK/MMP-2 Pathway Induced by Ampelopsin in the Human Malignant Melanoma A375 Cell Line. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20912864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Malignant melanoma is one of the most aggressive skin cancers, having a very high mortality rate. However, its effective treatment is not clear. Ampelopsin, a plant flavonoid, has been reported to inhibit cell growth and/or induce apoptosis in various types of tumor. In this study, it was shown that ampelopsin significantly inhibits melanoma A375 cell line proliferation in a concentration-dependent/time-dependent manner. The flow cytometric data clearly demonstrated that ampelopsin causes cell cycle arrest in the G2/M phase. Moreover, it also confirmed that growth inhibition mediated by treatment with ampelopsin is related to the decreased expression of Cdc2, Cdc25c, cyclin B1, and activation of caspase-3 and Bax, purportedly by epidermal growth factor receptor (EGFR), extracellular regulated protein kinases, and matrix metalloproteinase-2 (MMP-2) downregulation. As a result of this work, these findings suggest that ampelopsin inhibits human malignant melanoma A375 cell line proliferation by suppressing the EGFR/ERK/MMP-2 pathway.
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Affiliation(s)
- Fan Yang
- Department of Plastic Surgery and Burns, Affiliated Taihe Hospital of Xi’an Jiaotong University Health Science Center, Shiyan, China
| | - Yin-hui Yang
- Department of Plastic Surgery and Burns, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Wei-hui Zeng
- Department of Dermatology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
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Hong SW, Park NS, Noh MH, Shim JA, Ahn BN, Kim YS, Kim D, Lee HK, Hur DY. Combination treatment with erlotinib and ampelopsin overcomes erlotinib resistance in NSCLC cells via the Nox2-ROS-Bim pathway. Lung Cancer 2017; 106:115-124. [DOI: 10.1016/j.lungcan.2017.02.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/07/2017] [Accepted: 02/11/2017] [Indexed: 01/10/2023]
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Ampelopsin attenuates lipopolysaccharide-induced inflammatory response through the inhibition of the NF-κB and JAK2/STAT3 signaling pathways in microglia. Int Immunopharmacol 2017; 44:1-8. [DOI: 10.1016/j.intimp.2016.12.018] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 01/02/2023]
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LIU CHANGYING, ZHAO PENGFEI, YANG YUBAO, XU XIAODONG, WANG LIANG, LI BO. Ampelopsin suppresses TNF-α-induced migration and invasion of U2OS osteosarcoma cells. Mol Med Rep 2016; 13:4729-36. [DOI: 10.3892/mmr.2016.5124] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 02/16/2016] [Indexed: 11/05/2022] Open
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Liu P, Zou D, Chen K, Zhou Q, Gao Y, Huang Y, Zhu J, Zhang Q, Mi M. Dihydromyricetin Improves Hypobaric Hypoxia-Induced Memory Impairment via Modulation of SIRT3 Signaling. Mol Neurobiol 2015; 53:7200-7212. [PMID: 26687185 DOI: 10.1007/s12035-015-9627-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 12/08/2015] [Indexed: 01/17/2023]
Abstract
Inadequate oxygen availability-for instance at high altitudes-leads to hippocampal neurodegeneration and memory impairment. Although oxidative stress is one factor, the mechanism underlying the effects of hypobaric hypoxia (HH) are unclear, and effective strategies for preventing the resultant damage to the brain are limited. In the present study, we demonstrate that ingesting dihydromyricetin (DM) protects against memory impairment in adult rats subjected to HH for 7 days, equivalent to an altitude of 5000 m above sea level. Moreover, DM treatment stimulated mitochondrial biogenesis and improved mitochondrial morphology and function, suppressed the generation of reactive oxygen species, and reduced lipid peroxidation in the hippocampus. In HT-22 cells exposed to hypoxic conditions, the neuroprotective effects of DM were shown to be exerted via attenuation of oxidative stress through sirtuin 3-induced forkhead box O3 deacetylation.
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Affiliation(s)
- Peng Liu
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Dan Zou
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Ka Chen
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Qicheng Zhou
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Yanxiang Gao
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Yujie Huang
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Jundong Zhu
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Qianyong Zhang
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China
| | - Mantian Mi
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University; Chongqing Key Laboratory of Nutrition and Food Safety; Chongqing Medical Nutrition Research Center, Chongqing, 400038, People's Republic of China.
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Zhang Z, Zhang G, Kong C, Gong D. PP242 suppresses bladder cancer cell proliferation and migration through deactivating the mammalian target of rapamycin complex 2/AKT1 signaling pathway. Mol Med Rep 2015; 13:333-8. [PMID: 26548560 DOI: 10.3892/mmr.2015.4528] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Accepted: 10/06/2015] [Indexed: 11/06/2022] Open
Abstract
While most cancer types are resistant to mammalian target of rapamycin complex 1 (mTORC1) inhibitor rapamycin, recent studies have identified mTORC2 as an important prospective therapeutic target for cancer. The present study assessed the effects of mTORC2 inhibitor PP242 on the proliferation and migration of bladder cancer cells by using Cell Counting Kit‑8, 5‑ethynyl‑2'‑deoxyuridine incorporation, wound healing and Transwell assays. Furthermore, the phosphorylation status of downstream signaling proteins of mTORC1 and mTORC2 was assessed using western blot analysis. The results demonstrated that PP242 concentration‑dependently inhibited the proliferation of bladder cancer cells. Simultaneously, the migration ability of bladder cancer cells was suppressed by PP242. In addition, PP242 markedly restrained the phosphorylation of AKT1 and mTORC2, while the phosphorylation status of S6K1 and mTORC1 was not affected. These results suggested that PP242 exerts potent inhibitory effects on bladder cancer cells by modulating the activity of the mTORC2/AKT1 pathway.
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Affiliation(s)
- Zhe Zhang
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Guojun Zhang
- Department of Hematology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110022, P.R. China
| | - Chuize Kong
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Daxin Gong
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Zhong S, Ma T, Zhang X, Lv M, Chen L, Tang J, Zhao J. MicroRNA expression profiling and bioinformatics analysis of dysregulated microRNAs in vinorelbine-resistant breast cancer cells. Gene 2014; 556:113-8. [PMID: 25445394 DOI: 10.1016/j.gene.2014.11.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/16/2014] [Accepted: 11/20/2014] [Indexed: 02/02/2023]
Abstract
Vinorelbine (NVB) is one of the most active cytotoxic agents in breast cancer, especially metastatic breast cancer. However, breast cancer patients who are treated with the drug often develop resistance to it and some other drugs. Recently studies have shown that microRNAs (miRNAs) play an important role in drug resistance. In present study, miRNA expression profiles of breast cancer cells MDA-MB-231/S and its NVB-resistant variant MDA-MB-231/NVB cells were analyzed using microarray and the results were confirmed by real-time quantitative polymerase chain reaction. Bioinformatic analyses were carried out to predict gene targets of the dysregulated miRNAs and to analyze their potential roles in the development of drug resistance. Here, 123 differentially expressed miRNAs were identified in the resistant subline compared to MDA-MB-231/S. Networks of KEGG pathways, Gene Ontology (GO) terms, and protein-protein interaction (PPI) of 17 specific selected dysregulated miRNAs were constructed. The results showed that MAPK, mTOR, Wnt, and TGF-beta signaling pathways and several target genes such as CCND1, GRB2 and NT5E may associate with drug resistance of breast cancer cells to NVB. In summary, this study demonstrates that altered miRNA expression pattern is involved in acquiring resistance to NVB in breast cancer MDA-MB-231 cells. All these analysis results provided us a comprehensive view of the function of differential expression miRNAs related to drug resistance of breast cancer and may be helpful for the further study.
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Affiliation(s)
- Shanliang Zhong
- Center of Clinical Laboratory Science, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing 210009, China
| | - Tengfei Ma
- Center of Clinical Laboratory Science, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing 210009, China
| | - Xiaohui Zhang
- Center of Clinical Laboratory Science, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing 210009, China
| | - Mengmeng Lv
- The Fourth Clinical School of Nanjing Medical University, Nanjing 210029, China
| | - Lin Chen
- Department of Oncology, Xuzhou Medical College, Xuzhou 221004, China
| | - Jinhai Tang
- Department of General Surgery, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing 210009, China
| | - Jianhua Zhao
- Center of Clinical Laboratory Science, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing 210009, China.
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