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Harmalkar DS, Sivaraman A, Nada H, Lee J, Kang H, Choi Y, Lee K. Natural products as IL-6 inhibitors for inflammatory diseases: Synthetic and SAR perspective. Med Res Rev 2024; 44:1683-1726. [PMID: 38305581 DOI: 10.1002/med.22022] [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: 03/28/2022] [Revised: 09/07/2023] [Accepted: 01/10/2024] [Indexed: 02/03/2024]
Abstract
Interleukin-6 (IL-6), a pleiotropic cytokine, plays a pivotal role in the pathophysiology of various diseases including diabetes, atherosclerosis, Alzheimer's disease, multiple myeloma, rheumatoid arthritis, and prostate cancer. The signaling pathways associated with IL-6 offer promising targets for therapeutic interventions in inflammatory diseases and IL-6-dependent tumors. Although certain anti-IL-6 monoclonal antibodies are currently employed clinically, their usage is hampered by drawbacks such as high cost and potential immunogenicity, limiting their application. Thus, the imperative arises to develop novel small non-peptide molecules acting as IL-6 inhibitors. Various natural products derived from diverse sources have been investigated for their potential to inhibit IL-6 activity. Nevertheless, these natural products remain inadequately explored in terms of their structure-activity relationships. In response, our review aims to provide syntheses and structure activity perspective of natural IL-6 inhibitors. The comprehensive amalgamation of information presented in this review holds the potential to serve as a foundation for forthcoming research endeavors by medicinal chemists, facilitating the design of innovative IL-6 inhibitors to address the complexities of inflammatory diseases.
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Affiliation(s)
- Dipesh S Harmalkar
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
- Department of Chemistry, Government College of Arts, Science & Commerce, Sanquelim, Goa, India
| | - Aneesh Sivaraman
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Hossam Nada
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
| | - Joohan Lee
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
| | - Hyeseul Kang
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
| | - Yongseok Choi
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Kyeong Lee
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, South Korea
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2
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Wei Q, Zhang YH. Flavonoids with Anti-Angiogenesis Function in Cancer. Molecules 2024; 29:1570. [PMID: 38611849 PMCID: PMC11013936 DOI: 10.3390/molecules29071570] [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: 03/10/2024] [Revised: 03/23/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024] Open
Abstract
The formation of new blood vessels, known as angiogenesis, significantly impacts the development of multiple types of cancer. Consequently, researchers have focused on targeting this process to prevent and treat numerous disorders. However, most existing anti-angiogenic treatments rely on synthetic compounds and humanized monoclonal antibodies, often expensive or toxic, restricting patient access to these therapies. Hence, the pursuit of discovering new, affordable, less toxic, and efficient anti-angiogenic compounds is imperative. Numerous studies propose that natural plant-derived products exhibit these sought-after characteristics. The objective of this review is to delve into the anti-angiogenic properties exhibited by naturally derived flavonoids from plants, along with their underlying molecular mechanisms of action. Additionally, we summarize the structure, classification, and the relationship between flavonoids with their signaling pathways in plants as anti-angiogenic agents, including main HIF-1α/VEGF/VEGFR2/PI3K/AKT, Wnt/β-catenin, JNK1/STAT3, and MAPK/AP-1 pathways. Nonetheless, further research and innovative approaches are required to enhance their bioavailability for clinical application.
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Affiliation(s)
- Qiang Wei
- School of Medicine, Anhui Xinhua University, 555 Wangjiang West Road, Hefei 230088, China;
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Senrung A, Tripathi T, Aggarwal N, Janjua D, Yadav J, Chaudhary A, Chhokar A, Joshi U, Bharti AC. Phytochemicals Showing Antiangiogenic Effect in Pre-clinical Models and their Potential as an Alternative to Existing Therapeutics. Curr Top Med Chem 2024; 24:259-300. [PMID: 37867279 DOI: 10.2174/0115680266264349231016094456] [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: 05/27/2023] [Revised: 07/25/2023] [Accepted: 08/10/2023] [Indexed: 10/24/2023]
Abstract
Angiogenesis, the formation of new blood vessels from a pre-existing vascular network, is an important hallmark of several pathological conditions, such as tumor growth and metastasis, proliferative retinopathies, including proliferative diabetic retinopathy and retinopathy of prematurity, age-related macular degeneration, rheumatoid arthritis, psoriasis, and endometriosis. Putting a halt to pathology-driven angiogenesis is considered an important therapeutic strategy to slow down or reduce the severity of pathological disorders. Considering the attrition rate of synthetic antiangiogenic compounds from the lab to reaching the market due to severe side effects, several compounds of natural origin are being explored for their antiangiogenic properties. Employing pre-clinical models for the evaluation of novel antiangiogenic compounds is a promising strategy for rapid screening of antiangiogenic compounds. These studies use a spectrum of angiogenic model systems that include HUVEC two-dimensional culture, nude mice, chick chorioallantoic membrane, transgenic zebrafish, and dorsal aorta from rats and chicks, depending upon available resources. The present article emphasizes the antiangiogenic activity of the phytochemicals shown to exhibit antiangiogenic behavior in these well-defined existing angiogenic models and highlights key molecular targets. Different models help to get a quick understanding of the efficacy and therapeutics mechanism of emerging lead molecules. The inherent variability in assays and corresponding different phytochemicals tested in each study prevent their immediate utilization in clinical studies. This review will discuss phytochemicals discovered using suitable preclinical antiangiogenic models, along with a special mention of leads that have entered clinical evaluation.
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Affiliation(s)
- Anna Senrung
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
- Neuropharmacology and Drug Delivery Laboratory, Daulat Ram College, University of Delhi, Delhi, India
| | - Tanya Tripathi
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Nikita Aggarwal
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Divya Janjua
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Joni Yadav
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Apoorva Chaudhary
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Arun Chhokar
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
- Deshbandhu College, University of Delhi, Delhi, India
| | - Udit Joshi
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
| | - Alok Chandra Bharti
- Department of Zoology, Molecular Oncology Laboratory, University of Delhi (North Campus), Delhi, 110007, India
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Sassi A, Fredon M, Cotte AK, Fuselier C, Schneider C, Martiny L, Monchaud D, Chekir-Ghedira L, Aires V, Delmas D. Chrysin-Induced Regression of Angiogenesis via an Induction of DNA Damage Response and Oxidative Stress in In Vitro and In Vivo Models of Melanoma. Cells 2023; 12:1561. [PMID: 37371032 DOI: 10.3390/cells12121561] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/24/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
Despite the progress made in treatments, melanoma is one of the cancers for which its incidence and mortality have increased during recent decades. In the research of new therapeutic strategies, natural polyphenols such as chrysin could be good candidates owing to their capacities to modulate the different fundamental aspects of tumorigenesis and resistance mechanisms, such as oxidative stress and neoangiogenesis. In the present study, we sought to determine whether chrysin could exert antitumoral effects via the modulation of angiogenesis by acting on oxidative stress and associated DNA damage. For the first time, we show a link between chrysin-induced antiproliferative effects, the activation of the DNA damage pathway, and its ability to limit angiogenesis. More specifically, herein, we show that chrysin induces single- and double-stranded DNA breaks via the activation of the DNA damage response pathway: ATM (ataxia-telangiectasia-mutated)/Chk2 (checkpoint kinase 2) and ATR (ataxia telangiectasia and Rad3-related)/Chk1 (checkpoint kinase 1) pathways. Strong activation of this DNA damage response was found to be partly involved in the ability of chrysin to limit angiogenesis and may partly involve a direct interaction between the polyphenol and DNA G-quadruplex structures responsible for the replication fork collapse. Moreover, these events were associated with a marked reduction in melanoma cells' capacity to secrete proangiogenic factor VEGF-A. The disruption of these key protein actors in tumor growth by chrysin was also confirmed in a syngeneic model of B16 melanoma. This last point is of importance to further consider the use of chrysin as a new therapeutic strategy in melanoma treatment.
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Affiliation(s)
- Aicha Sassi
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231-Cancer and Adaptive Immune Response Team, Bioactive Molecules and Health Research Group, 21000 Dijon, France
- Research Unit Bioactive Natural Products and Biotechnology UR17ES49, Faculty of Dental Medicine of Monastir, University of Monastir, Avicenne Street, Monastir 5000, Tunisia
| | - Maxime Fredon
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231-Cancer and Adaptive Immune Response Team, Bioactive Molecules and Health Research Group, 21000 Dijon, France
| | - Alexia K Cotte
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231-Cancer and Adaptive Immune Response Team, Bioactive Molecules and Health Research Group, 21000 Dijon, France
| | - Camille Fuselier
- Faculté des Sciences Exactes et Naturelles, UMR CNRS 7369 MEDyC, Université de Reims Champagne Ardenne, 51687 Reims, France
| | - Christophe Schneider
- Faculté des Sciences Exactes et Naturelles, UMR CNRS 7369 MEDyC, Université de Reims Champagne Ardenne, 51687 Reims, France
| | - Laurent Martiny
- Faculté des Sciences Exactes et Naturelles, UMR CNRS 7369 MEDyC, Université de Reims Champagne Ardenne, 51687 Reims, France
| | - David Monchaud
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- Institut de Chimie Moléculaire (ICMUB), CNRS UMR6302, UBFC, 21078 Dijon, France
| | - Leila Chekir-Ghedira
- Research Unit Bioactive Natural Products and Biotechnology UR17ES49, Faculty of Dental Medicine of Monastir, University of Monastir, Avicenne Street, Monastir 5000, Tunisia
| | - Virginie Aires
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231-Cancer and Adaptive Immune Response Team, Bioactive Molecules and Health Research Group, 21000 Dijon, France
| | - Dominique Delmas
- UFR Sciences de Santé, Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231-Cancer and Adaptive Immune Response Team, Bioactive Molecules and Health Research Group, 21000 Dijon, France
- Centre de Lutte Contre le Cancer Georges François Leclerc Center, 21000 Dijon, France
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Farhadi A, Homayouni Tabrizi M, Sadeghi S, Vala D, Khosravi T. Targeted delivery and anticancer effects of Chrysin-loaded chitosan-folic acid coated solid lipid nanoparticles in pancreatic malignant cells. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2023; 34:315-333. [PMID: 36063019 DOI: 10.1080/09205063.2022.2121589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aim of this survey was to load Chrysin (CHY) on solid lipid nanoparticles (SLNs) and decorate the nanoparticles with folate-bound chitosan to increase the effectiveness of the treatment. CHY-SCF-NPs were synthesized by homogenizing and sonication methods and characterized. FA binding and encapsulation efficiency (HPLC), antioxidant capacity (ABTS and DPPH), cell viability assay (MTT), programmed cell death analysis (fluorescence staining, flow cytometry, and qPCR), and angiogenesis (CAM and molecular analysis) assay were done for assessment of therapeutic efficiency of CHY-SCF-NPs. Increases in size and change in surface charge of CHY-SLNs (PS: 84.3 nm and ZP: -18 mV) were reported after coating with folate-bound chitosan (PS: 125 nm and ZP: +34.9 mV). CHY-SCF-NPs inhibited PANC, MCF-7, A2780, and HepG2 as malignant cells and HFF as normal cells with IC50∼53, 55, 249, and >250 µg/mL, respectively. Also, CHY-SCF-NPs scavenged ABTS (IC50: 123.73 µg/mL), and DPPH (IC50: 108.7 µg/mL) free radicals and suppressed angiogenesis in the CAM and qPCR assays. Up-regulation of Bax and caspase 9 genes as well as the fluorescence staining and cell cycle results confirmed the pro-apoptotic properties of CHY-SCF-NPs. CHY-SCF-NPs can be considered a promising anti-cancer candidate for preclinical and clinical studies of pancreatic cancer.
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Affiliation(s)
- Amin Farhadi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Soroush Sadeghi
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Danial Vala
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Tina Khosravi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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The Role of Natural Products as Inhibitors of JAK/STAT Signaling Pathways in Glioblastoma Treatment. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7838583. [PMID: 36193062 PMCID: PMC9526628 DOI: 10.1155/2022/7838583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/28/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022]
Abstract
The permeability of glioblastoma, as well as its escaping the immune system, makes them one of the most deadly human malignancies. By avoiding programmed cell death (apoptosis), unlimited cell growth and metastatic ability could dramatically affect the immune system. Genetic mutations, epigenetic changes, and overexpression of oncogenes can cause this process. On the other hand, the blood-brain barrier (BBB) and intratumor heterogeneity are important factors causing resistance to therapy. Several signaling pathways have been identified in this field, including the Janus tyrosine kinase (JAK) converter and signal transducer and activator of transcription (STAT) activator pathways, which are closely related. In addition, the JAK/STAT signaling pathway contributes to a wide array of tumorigenesis functions, including replication, anti-apoptosis, angiogenesis, and immune suppression. Introducing this pathway as the main tumorigenesis and treatment resistance center can give a better understanding of how it operates. In light of this, it is an important goal in treating many disorders, particularly cancer. The inhibition of this signaling pathway is being considered an approach to the treatment of glioblastoma. The use of natural products alternatively to conventional therapies is another area of research interest among researchers. Some natural products that originate from plants or natural sources can interfere with JAK/STAT signaling in human malignant cells, also by stopping the progression and phosphorylation of JAK/STAT, inducing apoptosis, and stopping the cell cycle. Natural products are a viable alternative to conventional chemotherapy because of their cost-effectiveness, wide availability, and almost no side effects.
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Varghese R, George Priya Doss C, Kumar RS, Almansour AI, Arumugam N, Efferth T, Ramamoorthy S. Cardioprotective effects of phytopigments via multiple signaling pathways. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 95:153859. [PMID: 34856476 DOI: 10.1016/j.phymed.2021.153859] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/08/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Cardiovascular diseases (CVDs) are among the deadliest non-communicable diseases, and millions of dollars are spent every year to combat CVDs. Unfortunately, the multifactorial etiology of CVDs complicates the development of efficient therapeutics. Interestingly, phytopigments show significant pleiotropic cardioprotective effects both in vitro and in vivo. PURPOSE This review gives an overview of the cardioprotective effects of phytopigments based on in vitro and in vivo studies as well as clinical trials. METHODS A literature-based survey was performed to collect the available data on cardioprotective activities of phytopigments via electronic search engines such as PubMed, Google Scholar, and Scopus. RESULTS Different classes of phytopigments such as carotenoids, xanthophylls, flavonoids, anthocyanins, anthraquinones alleviate major CVDs (e.g., cardiac hypertrophy, atherosclerosis, hypertension, cardiotoxicities) via acting on signaling pathways related to AMPK, NF-κB, NRF2, PPARs, AKT, TLRs, MAPK, JAK/STAT, NLRP3, TNF-α, and RA. CONCLUSION Phytopigments represent promising candidates to develop novel and effective CVD therapeutics. More randomized, placebo-controlled clinical studies are recommended to establish the clinical efficacy of phytopigments.
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Affiliation(s)
- Ressin Varghese
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - C George Priya Doss
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Raju Suresh Kumar
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Natarajan Arumugam
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Mainz, Germany
| | - Siva Ramamoorthy
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India.
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Dual inhibitors of Interleukin-6 and acetylcholinesterase for treatment of Alzheimer's disease: Design, docking, synthesis and biological evaluation. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shi Y, Ni J, Tao M, Ma X, Wang Y, Zang X, Hu Y, Qiu A, Zhuang S, Liu N. Elevated expression of HDAC6 in clinical peritoneal dialysis patients and its pathogenic role on peritoneal angiogenesis. Ren Fail 2021; 42:890-901. [PMID: 32862739 PMCID: PMC7472510 DOI: 10.1080/0886022x.2020.1811119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Peritoneal dialysis (PD) is an important renal replacement therapy for end-stage renal disease (ESRD) patients. However, its complications, such as peritoneal fibrosis (PF) and angiogenesis can cause ultrafiltration failure and PD termination. Histone deacetylase 6 (HDAC6) has been demonstrated to be involved in PF. However, its underlying role in peritoneal angiogenesis is still unknown and clinical value needs to be explored. In this study, we analyzed the expression of HDAC6 in the peritoneum from patients with non-PD and PD-related peritonitis and dialysis effluent from stable PD patients. Our study revealed that HDAC6 expressed highly in the peritoneum with peritonitis and co-stained with α-smooth muscle actin (α-SMA), a biomarker of the myofibroblast. And the level of HDAC6 in the dialysate increased with time and positively correlated with transforming growth factor-β1 (TGF-β1), interleukin-6 (IL-6) and vascular endothelial growth factor (VEGF), and negatively with cancer antigen 125 (CA125). In vitro, blockading HDAC6 with a selective inhibitor tubastatin A (TA) or silencing HDAC6 with a small interfering RNA (siRNA) prominently decreased IL-6-stimulated VEGF expression in cultured human peritoneal mesothelial cells (HPMCs), and inhibited proliferation and vasoformation of human umbilical vein endothelial cells (HUVECs). TA or HDAC6 siRNA also suppressed the expression of Wnt1, β-catenin, and the phosphorylation of STAT3 in IL-6-treated HPMCs. In summary, HDAC6 inhibition protects against PD-induced angiogenesis through suppression of IL-6/STAT3 and Wnt1/β-catenin signaling pathway, subsequently reducing the VEGF production and angiogenesis. It could become a new therapeutic target or forecast biomarker for PF, inflammation, and angiogenesis in the future.
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Affiliation(s)
- Yingfeng Shi
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jun Ni
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Immunology and Microbiology, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Tao
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiaoyan Ma
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Nephrology, Baoshan Branch of Shanghai First People's Hospital, Shanghai, China
| | - Yi Wang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiujuan Zang
- Department of Nephrology, Shanghai Songjiang District Central Hospital, Shanghai, China
| | - Yan Hu
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Andong Qiu
- School of Life Science and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, China
| | - Shougang Zhuang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medicine, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI, USA
| | - Na Liu
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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Chrysin boosts KLF2 expression through suppression of endothelial cell-derived exosomal microRNA-92a in the model of atheroprotection. Eur J Nutr 2021; 60:4345-4355. [PMID: 34041583 DOI: 10.1007/s00394-021-02593-1] [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] [Received: 09/23/2020] [Accepted: 05/14/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Atherosclerosis and its related clinical complications are the leading cause of death. MicroRNA (miR)-92a in the inflammatory endothelial dysfunction leads to atherosclerosis. Krüppel-like factor 2 (KLF2) is required for vascular integrity and endothelial function maintenance. Flavonoids possess many biological properties. This study investigated the vascular protective effects of chrysin in balloon-injured carotid arteries. MATERIALS AND METHODS Exosomes were extracted from human coronary artery endothelial cell (HCAEC) culture media. Herb flavonoids and chrysin were the treatments in these atheroprotective models. Western blotting and real-time PCRs were performed. In situ hybridization, immunohistochemistry, and immunofluorescence analyses were employed. RESULTS MiR-92a increased after balloon injury and was present in HCAEC culture media. Chrysin was treated, and significantly attenuated the miR-92a levels after balloon injury, and similar results were obtained in HCAEC cultures in vitro. Balloon injury-induced miR-92a expression, and attenuated KLF2 expression. Chrysin increased the KLF2 but reduced exosomal miR-92a secretion. The addition of chrysin and antagomir-92a, neointimal formation was reduced by 44.8 and 49.0% compared with balloon injury after 14 days, respectively. CONCLUSION Chrysin upregulated KLF2 expression in atheroprotection and attenuated endothelial cell-derived miR-92a-containing exosomes. The suppressive effect of miR-92a suggests that chrysin plays an atheroprotective role. Proposed pathway for human coronary artery endothelial cell (HCAEC)-derived exosomes induced by chrysin to suppress microRNA (miR)-92a expression and counteract the inhibitory effect of miR-92a on KLF2 expression in HCAECs. This provides an outline of the critical role of the herbal flavonoid chrysin, which may serve as a valuable therapeutic supplement for atheroprotection.
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Talebi M, Talebi M, Farkhondeh T, Simal-Gandara J, Kopustinskiene DM, Bernatoniene J, Samarghandian S. Emerging cellular and molecular mechanisms underlying anticancer indications of chrysin. Cancer Cell Int 2021; 21:214. [PMID: 33858433 PMCID: PMC8050922 DOI: 10.1186/s12935-021-01906-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 04/07/2021] [Indexed: 02/07/2023] Open
Abstract
Chrysin has been shown to exert several beneficial pharmacological activities. Chrysin has anti-cancer, anti-viral, anti-diabetic, neuroprotective, cardioprotective, hepatoprotective, and renoprotective as well as gastrointestinal, respiratory, reproductive, ocular, and skin protective effects through modulating signaling pathway involved in apoptosis, oxidative stress, and inflammation. In the current review, we discussed the emerging cellular and molecular mechanisms underlying therapeutic indications of chrysin in various cancers. Online databases comprising Scopus, PubMed, Embase, ProQuest, Science Direct, Web of Science, and the search engine Google Scholar were searched for available and eligible research articles. The search was conducted by using MeSH terms and keywords in title, abstract, and keywords. In conclusion, experimental studies indicated that chrysin could ameliorate cancers of the breast, gastrointestinal tract, liver and hepatocytes, bladder, male and female reproductive systems, choroid, respiratory tract, thyroid, skin, eye, brain, blood cells, leukemia, osteoblast, and lymph. However, more studies are needed to enhance the bioavailability of chrysin and evaluate this agent in clinical trial studies.
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Affiliation(s)
- Marjan Talebi
- Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 1991953381, Tehran, Iran
| | - Mohsen Talebi
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX, 76019, USA
- Food Safety Net Services (FSNS), San Antonio, TX, 78216, USA
| | - Tahereh Farkhondeh
- Cardiovscular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
- Faculty of Pharmacy, Birjand University of Medical Sciences, Birjand, Iran
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Science, University of Vigo, Ourense Campus, 32004, Ourense, Spain
| | - Dalia M Kopustinskiene
- Institute of Pharmaceutical Technologies, Faculty of Pharmacy, Medical Academy, Lithuanian University of Health Sciences, Sukileliu pr. 13, 50161, Kaunas, Lithuania
| | - Jurga Bernatoniene
- Institute of Pharmaceutical Technologies, Faculty of Pharmacy, Medical Academy, Lithuanian University of Health Sciences, Sukileliu pr. 13, 50161, Kaunas, Lithuania
| | - Saeed Samarghandian
- Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran.
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Mi JL, Xu M, Liu C, Wang RS. Identification of novel biomarkers and small-molecule compounds for nasopharyngeal carcinoma with metastasis. Medicine (Baltimore) 2020; 99:e21505. [PMID: 32769887 PMCID: PMC7593018 DOI: 10.1097/md.0000000000021505] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The purpose of this study was to investigate novel biomarkers and potential mechanisms in nasopharyngeal carcinoma (NPC) patients with metastasis.Two microarray datasets (GSE103611 and GSE36682) were obtained from GEO database, differentially expressed genes (DEGs) and differentially expressed miRNA (DEMs) were identified, Gene ontology (GO) as well as Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were conducted with DEGs and DEMs targeted genes. Protein-protein interactions (PPI) network of the DEGs and DEMs targeted genes were constructed, furthermore, Connectivity Map (CMap) database was applied to select the potential drugs with therapeutic effects.Overall, we identified 396 upregulated and 19 downregulated DEGs. Additionally, we identified 1 upregulated DEM, miR-135b, and a downregulated DEM, miR-574-5p. Functional enrichment analysis indicated that both DEGs and DEMs targeted genes participated in biological process (BP) of regulation of transcription from RNA polymerase II promoter, DNA-templated positive regulation of transcription, and Epstein-Barr virus infection signaling pathway. Besides, upregulated EP300 gene was a hub node both in DEGs and DEMs target genes. CMap database analysis indicated that sanguinarine, verteporfin, and chrysin are potential drugs for prevention and treatment of NPC metastasis.In summary, the common hub gene, biological process and pathway identified in the study provided a novel insight into the potential mechanism of NPC metastasis. Furthermore, we identified several possible small molecule compounds for treatment of NPC metastasis.
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Affiliation(s)
- Jing-Lin Mi
- Department of Radiation Oncology Clinical Medical Research Center, Guangxi Medical University
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Nanning, P.R. China
| | - Meng Xu
- Department of Radiation Oncology Clinical Medical Research Center, Guangxi Medical University
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Nanning, P.R. China
| | - Chang Liu
- Department of Radiation Oncology Clinical Medical Research Center, Guangxi Medical University
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Nanning, P.R. China
| | - Ren-Sheng Wang
- Department of Radiation Oncology Clinical Medical Research Center, Guangxi Medical University
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Nanning, P.R. China
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Liao ZY, Liang IC, Li HJ, Wu CC, Lo HM, Chang DC, Hung CF. Chrysin Inhibits High Glucose-Induced Migration on Chorioretinal Endothelial Cells via VEGF and VEGFR Down-Regulation. Int J Mol Sci 2020; 21:ijms21155541. [PMID: 32748894 PMCID: PMC7432058 DOI: 10.3390/ijms21155541] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 02/07/2023] Open
Abstract
Background: Diabetes mellitus (DM) is a chronic inflammatory disease, which causes multiple complications. Diabetic retinopathy (DR) is among these complications and is a dominant cause of vision loss for diabetic patients. Numerous studies have shown that chrysin, a flavonoid, has many biological activities such as anti-oxidation and anti-inflammation. However, it is rarely used in ocular diseases. In this study, we examined the inhibitory effects of flavonoid on high glucose induced migration of chorioretinal endothelial cells (RF/6A cells) and its mechanism. Materials and methods: The viability of RF/6A cells treated with chrysin was examined with a 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. The migration of RF/6A cells was assessed by the transwell migration and scratch wound assays. The expression of AKT, ERK, vascular endothelial growth factor (VEGF), HIF−1α and MMP-2 were determined by western blotting. To observe the mRNA expression of VEGF receptor (VEGFR), qRT-PCR, was utilized. Results: The results showed that chrysin can dose-dependently inhibit the RF/6A cell migration in vitro transwell and the scratch wound assays which are induced by high glucose. After pretreatment of RF/6A cells with different concentrations of chrysin, they did not produce any cytotoxicity in MTT assay. Moreover, chrysin down-regulated both phosphorylated AKT and ERK, as well as attenuated the expression levels of MMP-2. It also decreased the expression of the VEGF transcription factor and VEGF. Furthermore, it was shown that chrysin could suppress the protein and mRNA expression levels of VEGFR. Conclusion: The results indicate that chrysin could down-regulate the phosphorylation of AKT, ERK and MMP-2 and reduce the effects of VEGF and VEGFR in a high glucose environment. It further inhibits the high glucose-induced migration of RE/6A cells. Therefore, chrysin may have the potential for visual protection.
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Affiliation(s)
- Zhen-Yu Liao
- Department of Internal Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 111, Taiwan;
| | - I-Chia Liang
- Department of Ophthalmology, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan;
- Ph.D. Program in Nutrition and Food Science, Fu Jen Catholic University, New Taipei City 24205, Taiwan
| | - Hsin-Ju Li
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
| | - Chia-Chun Wu
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
| | - Huey-Ming Lo
- Division of Cardiology, Fu Jen Catholic University Hospital, New Taipei City 24205, Taiwan;
| | - Der-Chen Chang
- Department of Mathematics and Statistics and Department of Computer Science, Georgetown University, Washington, DC 20057, USA;
| | - Chi-Feng Hung
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
- MS Program Transdisciplinary Long Term Care, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Ph.D. Program in Pharmaceutical Biotechnology, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Correspondence: ; Tel.: +886-2-2905-2171
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Zhong W, Hou H, Liu T, Su S, Xi X, Liao Y, Xie R, Jin G, Liu X, Zhu L, Zhang H, Song X, Yang C, Sun T, Cao H, Wang B. Cartilage Oligomeric Matrix Protein promotes epithelial-mesenchymal transition by interacting with Transgelin in Colorectal Cancer. Am J Cancer Res 2020; 10:8790-8806. [PMID: 32754278 PMCID: PMC7392026 DOI: 10.7150/thno.44456] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 06/07/2020] [Indexed: 12/20/2022] Open
Abstract
Background and Purpose: The role of the cartilage oligomeric matrix protein (COMP) in epithelial-mesenchymal transition (EMT) in tumor progression has been studied, but its exact regulatory mechanism remains unknown. Methods: The interaction between COMP and the actin-binding protein transgelin (TAGLN) was identified by interaction protein prediction and co-immunoprecipitation and verified through the stochastic optical reconstruction microscopy (STORM) and duolink experiments. Western blot and immunofluorescence analyses were conducted to detect the changes in EMT-related markers after COMP overexpression and knockdown. Molecular docking and Biacore of the interaction interface of COMP/TAGLN revealed that Chrysin directly targeted COMP. The promotion of COMP and the Chrysin inhibition of EMT were detected through the cell migration, invasion, apoptosis, and xenotransplantation of nude mice. Results: COMP interacts with TAGLN in EMT in colorectal cancer to regulate cytoskeletal remodeling and promote malignant progression. COMP is highly expressed in highly malignant colorectal cancer and positively correlated with TAGLN expression. COMP knockdown can inhibit colorectal cancer metastasis and invasion, whereas COMP overexpression promotes EMT in colorectal cancer. Through virtual screening of the protein interaction interface, Chrysin, a flavonoid compound extracted from Oroxylum indicum, was found to have the highest docking score to the COMP/TAGLN complex. Chrysin inhibited COMP, thereby preventing EMT and the malignant progression of colorectal cancer. Conclusions: This study illustrated the role of COMP in EMT and suggested that COMP/TAGLN may be a potential tumor therapeutic target. Chrysin exhibits obvious antitumor effects. This work provides a preliminary antitumor therapy to target COMP or its interaction protein to inhibit EMT.
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Kaur S, Bansal Y, Kumar R, Bansal G. A panoramic review of IL-6: Structure, pathophysiological roles and inhibitors. Bioorg Med Chem 2020; 28:115327. [PMID: 31992476 DOI: 10.1016/j.bmc.2020.115327] [Citation(s) in RCA: 199] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 01/03/2020] [Accepted: 01/12/2020] [Indexed: 02/07/2023]
Abstract
Interleukin-6 (IL-6) is a pleiotropic pro-inflammatory cytokine. Its deregulation is associated with chronic inflammation, and multifactorial auto-immune disorders. It mediates its biological roles through a hexameric complex composed of IL-6 itself, its receptor IL-6R, and glycoprotein 130 (IL-6/IL-6R/gp130). This complex, in turn, activates different signaling mechanisms (classical and trans-signaling) to execute various biochemical functions. The trans-signaling mechanism activates various pathological routes, like JAK/STAT3, Ras/MAPK, PI3K-PKB/Akt, and regulation of CD4+ T cells and VEGF levels, which cause cancer, multiple sclerosis, rheumatoid arthritis, anemia, inflammatory bowel disease, Crohn's disease, and Alzheimer's disease. Involvement of IL-6 in pathophysiology of these complex diseases makes it an important target for the treatment of these diseases. Though some anti-IL-6 monoclonal antibodies are being used clinically, but their high cost, only parenteral administration, and possibility of immunogenicity have limited their use, and warranted the development of novel small non-peptide molecules as IL-6 inhibitors. In the present report, all molecules reported in literature as IL-6 inhibitors have been classified as IL-6 production, IL-6R, and IL-6 signaling inhibitors. Reports available till date are critically studied to identify important and salient structural features common in these molecules. These analyses would assist medicinal chemists to design novel and potent IL-6 production and signaling inhibitors, through knowledge- and/or computer-based approaches, for the treatment of complex multifactorial diseases.
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Affiliation(s)
- Sukhvir Kaur
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Yogita Bansal
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India.
| | - Raj Kumar
- Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda 151001, India
| | - Gulshan Bansal
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
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Sajadimajd S, Momtaz S, Haratipour P, El-Senduny FF, Panah AI, Navabi J, Soheilikhah Z, Farzaei MH, Rahimi R. Molecular Mechanisms Underlying Cancer Preventive and Therapeutic Potential of Algal Polysaccharides. Curr Pharm Des 2019; 25:1210-1235. [DOI: 10.2174/1381612825666190425155126] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 12/22/2022]
Abstract
Background:
Algal polysaccharide and oligosaccharide derivatives have been shown to possess a
variety of therapeutic potentials and drug delivery applications. Algal polysaccharides contain sulfated sugar
monomers derived from seaweed including brown, red, and green microalgae. Here, in this review, the recent
progress of algal polysaccharides’ therapeutic applications as anticancer agents, as well as underlying cellular and
molecular mechanisms was investigated. Moreover, recent progress in the structural chemistry of important polysaccharides
with anticancer activities were illustrated.
Methods:
Electronic databases including “Scopus”, “PubMed”, and “Cochrane library” were searched using the
keywords “cancer”, or “tumor”, or “malignancy” in title/abstract, along with “algae”, or “algal” in the whole text
until July 2018. Only English language papers were included.
Results:
The most common polysaccharides involved in cancer management were sulfated polysaccharides, Fucoidans,
Carageenans, and Ulvan from different species of algae that have been recognized in vitro and in vivo.
The underlying anticancer mechanisms of algal polysaccharides included induction of apoptosis, cell cycle arrest,
modulation of transduction signaling pathways, suppression of migration and angiogenesis, as well as activation
of immune responses and antioxidant system. VEGF/VEGFR2, TGFR/Smad/Snail, TLR4/ROS/ER, CXCL12/
CXCR4, TGFR/Smad7/Smurf2, PI3K/AKT/mTOR, PBK/TOPK, and β-catenin/Wnt are among the main cellular
signaling pathways which have a key role in the preventive and therapeutic effects of algal polysaccharides
against oncogenesis.
Conclusion:
Algal polysaccharides play a crucial role in the management of cancer and may be considered the
next frontier in pharmaceutical research. Further well-designed clinical trials are mandatory to evaluate the efficacy
and safety of algal polysaccharides in patients with cancer.
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Affiliation(s)
| | - Saeideh Momtaz
- Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran
| | - Pouya Haratipour
- Department of Chemistry, Sharif University of Technology, Tehran, Iran
| | - Fardous F. El-Senduny
- Biochemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Amin Iran Panah
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Jafar Navabi
- Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Zhaleh Soheilikhah
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohammad Hosein Farzaei
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Roja Rahimi
- Department of Traditional Pharmacy, School of Persian Medicine, Tehran University of Medical Sciences, Tehran 1416663361, Iran
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Zhang Y, Chen F, Xiao X, Pan W, Yuan Q, Cao J. Chrysin inhibits sphere formation in SMMC-7721 cells via modulation of SHP-1/STAT3 signaling pathway. Cancer Manag Res 2019; 11:2977-2985. [PMID: 31114345 PMCID: PMC6497861 DOI: 10.2147/cmar.s193647] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/27/2019] [Indexed: 12/17/2022] Open
Abstract
Background: Chrysin is a natural flavonoid which has been identified as a candidate anti-cancer agent due to its inhibitory effect on a variety of cancer cells, including targeted inhibition of sphere formation in hepatocellular carcinoma (HCC) cell lines. However, the mechanism by which chrysin modulates HCC spheres remains unclear. Materials and methods: In this study, we investigate the effect of chrysin on the regulation of SHP-1 and its downstream signal molecule STAT3 to explain the mechanism by which chrysin inhibits sphere formation of HCC cell lines. Results: Here, we found that SHP-1 protein expression was markedly down-regulated in the spheres from both SMMC-7721 and MHCC97H cells. Chrysin significantly inhibited sphere formation and upregulated the expression of SHP-1 protein in both SMMC-7721 and MHCC97H cells, as well as reduced p-STAT3 and Twist1 expressions in SMMC-7721 cells. Furthermore, knockdown of SHP-1 in SMMC-7721 cells resulted in the induction of p-STAT3 and Twist1 protein expression and antagonizing the inhibitory effect of chrysin on sphere formation in SMMC-7721 cells. Conclusion: Overall, the study findings demonstrated that chrysin acts as a candidate for the treatment of HCC through modulating SHP-1/STAT3 signaling pathway.
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Affiliation(s)
- Yanqin Zhang
- Department of Pharmacy, Xiangya Hospital of Central South University, Changsha, 410008, People's Republic of China.,Department of Pharmacy, Hunan Food and Drug Vocational College, Changsha, 410208, People's Republic of China
| | - Feng Chen
- Department of Pharmacy, Xiangya Hospital of Central South University, Changsha, 410008, People's Republic of China
| | - Xinghua Xiao
- Department of Pharmacy, Xiangya Hospital of Central South University, Changsha, 410008, People's Republic of China
| | - Weinan Pan
- Department of Pharmacy, Hunan Food and Drug Vocational College, Changsha, 410208, People's Republic of China
| | - Qing Yuan
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha 410013, People's Republic of China
| | - Jianguo Cao
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha 410013, People's Republic of China
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Wen Q, Xu C, Zhou J, Liu NM, Cui YH, Quan MF, Cao JG, Ren KQ. 8-bromo-7-methoxychrysin suppress stemness of SMMC-7721 cells induced by co-culture of liver cancer stem-like cells with hepatic stellate cells. BMC Cancer 2019; 19:224. [PMID: 30866863 PMCID: PMC6416872 DOI: 10.1186/s12885-019-5419-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 02/27/2019] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Our previous works have demonstrated that 8-bromo-7-methoxychrysin suppressed stemness of human hepatocellular carcinoma (HCC) cell line SMMC-7721 induced by condition medium from hepatic stellate cell line LX-2 that was activated by liver cancer stem-like cells (LCSCs). However, whether and whereby BrMC inhibits the stemness induced by co-culture of LCSCs and LX-2 cells remains to be investigated. METHODS The second-generation spheres by sphere culture were identified and used as SMMC-7721-and MHCC97H-derived LCSLCs. SMMC-7721-and MHCC97-derived LCSCs/LX-2 cells transwell co-culture system was treated with BrMC and its lead compound chrysin. The concentrations of IL-6, IL-8, HGF and PDGF in condition medium from co-culture were measured by enzyme-linked immunosorbent assay (ELISA). The stemness of SMMC-7721 cells was evaluated by sphere formation assay and western blot analysis for expression levels of cancer stem cell markers (CD133 and CD44).The expression levels of cancer-associated fibroblast markers (FAP-α and α-SMA) were employed to evaluate pathologic activation of LX-2 cells. Addition of IL-6 and/or HGF or deletion of IL-6 and/or HGF was conducted to investigate the mechanisms for BrMC and chrysin treatment in SMMC-7721-derived LCSLCs co-cultured with LX-2cells. RESULTS The co-culture of LCSLCs with LX-2 cells increased sphere formation capability as well as expression of CD133 and CD44 in SMMC-7721 cells, meanwhile, upregulated expression of FAP-α in LX-2 cells. ELISA indicated that the concentrations of IL-6 and HGF were significantly elevated in Co-CM than that of condition media from co-cultured SMMC-7721 cells/LX-2 cells. Treatment of BrMC and chrysin with co-cultures of SMMC-7721- and MHCC97H-derived LCSLCs and LX-2 cells effectively inhibited the above responses. Moreover, addition of IL-6 and/or HGF induced stemness of SMMC-7721 cells and activation of LX-2 cells, conversely, deletion of IL-6 and/or HGF suppressed those. Furthermore, the inhibitory effects of BrMC and chrysin on stemness of SMMC-7721 cells and activation of LX-2 cells were attenuated by addition of IL-6 or HGF, and enhanced by deletion of IL-6 or HGF. CONCLUSIONS Our results suggest IL-6 and HGF may be the key communication molecules for the interaction between LCSLCs and HSCs, and BrMC and chrysin could block these effects and be the novel therapeutic candidates for HCC management.
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Affiliation(s)
- Qi Wen
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Chang Xu
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Jie Zhou
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Nuo-Min Liu
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Ying-Hong Cui
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Mei-Fang Quan
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Jian-Guo Cao
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
| | - Kai-qun Ren
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, 410013 China
- Key Laboratory of Study and Discover of Small Targeted Molecules of Hunan Province, Changsha, 410013 China
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Nie GQ, Wang XQ, Yang MY. E804, a derivative of indirubin, promotes autophagy of gastric cancer cells through Stat3 signaling pathway. Shijie Huaren Xiaohua Zazhi 2017; 25:3184-3190. [DOI: 10.11569/wcjd.v25.i36.3184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To explore the pharmacological mechanism of E804, a derivative of indirubin, by investigating whether it can inhibit the viability of gastric cancer cells, alter the expression of markers of autophagy, and promote the autophagy activity.
METHODS MGC-803 and MKN-45 cells were treated with different concentrations of E804. Non-treated MGC-803 and MKN-45 cells were used as negative controls, and those treated with interleukin-6 (100 ng/mL) for 2 h were used as a positive control. After treatment, cell viability was detected by MTT assay. The expression of autophagy markers was detected by Western blot. The diameter of transplantable tumor in a subcutaneous xenotransplanted tumor model was also measured.
RESULTS The viability of both MGC-803 and MKN-45 cells declined significantly after treatment (P < 0.05). E804 increased the expression of LC3-B and Beclin-1, two markers of autophagy, in a dose-dependent manner. When comparing the maximal diameters of tumor in the control group (non-treated) and experimental group (treated with E804), the speed of tumor growth in the experimental group was significantly lower than that of the control group (P < 0.05).
CONCLUSION E804 can promote autophagy of gastric cancer cells to suppress their growth, at least partly by inhibiting the activation of Stat3.
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Affiliation(s)
- Guo-Qing Nie
- Department of Oncology, People's Hospital of Qingzhou, Qingzhou 262500, Shandong Province, China
| | - Xin-Qiang Wang
- Department of Oncology, People's Hospital of Qingzhou, Qingzhou 262500, Shandong Province, China
| | - Ming-Ying Yang
- Department of Oncology, People's Hospital of Qingzhou, Qingzhou 262500, Shandong Province, China
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Antiangiogenic Effect of Flavonoids and Chalcones: An Update. Int J Mol Sci 2017; 19:ijms19010027. [PMID: 29271940 PMCID: PMC5795978 DOI: 10.3390/ijms19010027] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 12/11/2017] [Accepted: 12/19/2017] [Indexed: 12/18/2022] Open
Abstract
Chalcones are precursors of flavonoid biosynthesis in plants. Both flavonoids and chalcones are intensively investigated because of a large spectrum of their biological activities. Among others, anticancer and antiangiogenic effects account for the research interest of these substances. Because of an essential role in cancer growth and metastasis, angiogenesis is considered to be a promising target for cancer treatment. Currently used antiangiogenic agents are either synthetic compounds or monoclonal antibodies. However, there are some limitations of their use including toxicity and high price, making the search for new antiangiogenic compounds very attractive. Nowadays it is well known that several natural compounds may modulate basic steps in angiogenesis. A lot of studies, also from our lab, showed that phytochemicals, including polyphenols, are potent modulators of angiogenesis. This review paper is focused on the antiangiogenic effect of flavonoids and chalcones and discusses possible underlying cellular and molecular mechanisms.
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Cancer chemoprevention revisited: Cytochrome P450 family 1B1 as a target in the tumor and the microenvironment. Cancer Treat Rev 2017; 63:1-18. [PMID: 29197745 DOI: 10.1016/j.ctrv.2017.10.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/30/2017] [Accepted: 10/31/2017] [Indexed: 02/08/2023]
Abstract
Cancer chemoprevention is the use of synthetic, natural or biological agents to prevent or delay the development or progression of malignancies. Intriguingly, many phytochemicals with anti-inflammatory and anti-angiogenic effects, recently proposed as chemoprevention strategies, are inhibitors of Cytochrome P450 family 1B1 (CYP1B1), an enzyme overexpressed in a wide variety of tumors and associated with angiogenesis. In turn, pro-inflammatory cytokines were reported to boost CYP1B1 expression, suggesting a key role of CYP1B1 in a positive loop of inflammatory angiogenesis. Other well-known pro-tumorigenic activities of CYP1B1 rely on metabolic bioactivation of xenobiotics and steroid hormones into their carcinogenic derivatives. In contrast to initial in vitro observations, in vivo studies demonstrated a protecting role against cancer for the other CYP1 family members (CYP1A1 and CYP1A2), suggesting that the specificity of CYP1 family inhibitors should be carefully taken into account for developing potential chemoprevention strategies. Recent studies also proposed a role of CYP1B1 in multiple cell types found within the tumor microenvironment, including fibroblasts, endothelial and immune cells. Overall, our review of the current literature suggests a positive loop between inflammatory cytokines and CYP1B1, which in turn may play a key role in cancer angiogenesis, acting on both cancer cells and the tumor microenvironment. Strategies aiming at specific CYP1B1 inhibition in multiple cell types may translate into clinical chemoprevention and angioprevention approaches.
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In vivo cellular and molecular gastroprotective mechanisms of chrysin; Emphasis on oxidative stress, inflammation and angiogenesis. Eur J Pharmacol 2017; 818:486-498. [PMID: 29126792 DOI: 10.1016/j.ejphar.2017.11.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/28/2017] [Accepted: 11/06/2017] [Indexed: 12/18/2022]
Abstract
Gastric ulcer is one of the major gastrointestinal disorders affecting people worldwide. Despite medical advances, management of gastric ulcer and its complications remains a challenge facing medicine nowadays. In addition, currently available medicines exhibit limited efficacy and several side effects. In the current study, the potential protective effects of chrysin -naturally occurring flavonoid - were tested against indomethacin-induced gastric ulcer model in rats. It was found that chrysin in both doses; 50 and 100mg/kg were effective in promoting mucus secretion and preventing the rise in ulcer and lesion indices, acid production and histologic changes induced by indomethacin. During investigation of the possible underlying mechanisms, chrysin significantly attenuated indomethacin-induced oxidative injury and inflammatory response. Also, chrysin activated peroxisome proliferator activated receptor-ɣ (PPAR-ɣ) leading to a phenotypic switch from pro-inflammatory M1 macrophages to the anti-inflammatory M2 macrophages that evidenced by the upregulated mRNA expression levels of PPAR-ɣ and M2 marker genes (Arg-1 and CD206) and down regulation of M1 marker genes (IL-6 and CCL3). Furthermore, chrysin promoted angiogenesis via increasing expression of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) and cluster of differentiation-31 (CD31). Collectively, these findings indicate that chrysin possesses a potential protective effect against indomethacin-induced gastric ulcer.
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Abstract
Cardiovascular diseases (CVDs) are the commonest cause of global mortality and morbidity. Atherosclerosis, the fundamental pathological manifestation of CVDs, is a complex process and is poorly managed both in terms of preventive and therapeutic intervention. Aberrant lipid metabolism and chronic inflammation play critical roles in the development of atherosclerosis. These processes can be targeted for effective management of the disease. Although managing lipid metabolism is in the forefront of current therapeutic approaches, controlling inflammation may also prove to be crucial for an efficient treatment regimen of the disease. Flavonoids, the plant-derived polyphenols, are known for their antiinflammatory properties. This review discusses the possible antiatherogenic role of 3 flavonoids, namely, chrysin, quercetin, and luteolin primarily known for their antiinflammatory properties.
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Zeinali M, Rezaee SA, Hosseinzadeh H. An overview on immunoregulatory and anti-inflammatory properties of chrysin and flavonoids substances. Biomed Pharmacother 2017; 92:998-1009. [DOI: 10.1016/j.biopha.2017.06.003] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/30/2017] [Accepted: 06/04/2017] [Indexed: 01/05/2023] Open
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25
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Luo Y, Cui Y, Cao X, Li X, Chen A, Zhang J, Chen X, Cao J. 8-Bromo-7-methoxychrysin-blocked STAT3/Twist axis inhibits the stemness of cancer stem cell-like cell originated from SMMC-7721 cells. Acta Biochim Biophys Sin (Shanghai) 2017; 49:458-464. [PMID: 28369327 DOI: 10.1093/abbs/gmx025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Indexed: 11/14/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) is a member of the family of latent cytoplasmic transcriptional factors that could regulate cell proliferation, survival, and development. It has been reported that Twist is a target gene of STAT3, and STAT3/Twist signaling plays an important role in regulating cancer progress. Here, to explore whether 8-bromo-7-methoxychrysin (BrMC) inhibits liver cancer stem-like cell (LCSLC) properties via disrupting STAT3/Twist signaling, we cultured SMMC-7721 cells in vitro, and evaluated the effects of BrMC on the stemness of spheroids by determining the sphere-forming capability and migration. The sphere formation assay results showed a concentration-dependent decrease of sphere-forming capacity in LCSLCs (P < 0.05) treated with different concentrations of BrMC. Wound-healing assays results demonstrated a concentration-dependent decline in cell migration of LCSLCs treated with different concentrations of BrMC. In addition, CD133, CD44, and ALDH1 levels were decreased in LCSLCs treated with BrMC. Treatment with different concentrations of BrMC also reduced the expressions of p-STAT3 and Twist1 proteins. The effect of BrMC was substantially enhanced by co-treatment with JSI-124, a specific inhibitor of STAT3. Ectopic expression of Twist1 attenuated the inhibitory effects of BrMC on sphere formation, migration, and expression of the markers in LCSLCs. However, it had no affect on p-STAT3 expression in LCSLCs. These results demonstrated that BrMC inhibits the stemness of LCSLCs originated from SMMC-7721 cell line by inhibiting STAT3/Twist signal axis.
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Affiliation(s)
- Yimin Luo
- Cancer Institute, Medical College, University of South China, Hengyang 421001, China
- Key Laboratory of Tumor Cellular & Molecular Pathology, University of South China, engyang 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Yinghong Cui
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha410013, China
| | - Xiaocheng Cao
- Laboratory of Molecular and Statistical Genetics, Hunan Normal University, Changsha 410081, China
| | - Xiang Li
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha410013, China
| | - A Chen
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha410013, China
| | - Jiansong Zhang
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha410013, China
| | - Xiangding Chen
- Laboratory of Molecular and Statistical Genetics, Hunan Normal University, Changsha 410081, China
| | - Jianguo Cao
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha410013, China
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26
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Kosakowska O. Experimental Paper. Intrapopulation variability of flavonoid content in roots of Baikal skullcap (Scutellaria baicalensis Georgi). HERBA POLONICA 2017. [DOI: 10.1515/hepo-2017-0002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Summary
Introduction: Baikal skullcap (Scutellaria baicalensis Georgi) is an important medicinal plant, indigenous to Asia. Due to a wide range of pharmacological activities, its roots has been used for ages in Traditional Chinese Medicine. Recently, the species has become an object of interest of Western medicine, as well. Objective: The aim of the study was to determine the variability of Baikal skullcap population originated from Mongolia and cultivated in Poland, in terms of content and composition of flavonoids in the roots. Methods: The objects of the study were 15 individual plants, selected within examined population and cloned in order to obtain a sufficient amount of raw material. The total content of flavonoids in roots was determined according to Polish Pharmacopeia 6th. The qualitative analysis of flavonoids was carried out using HPLC, Shimadzu chromatograph. Results: The dry mass of roots ranged from 25.88 to 56.14 g × plant-1. The total content of flavonoids (expressed as a quercetin equivalent) varied between 0.17 and 0.52% dry matter (DM). Nine compounds were detected within the group, with oroxylin A 7-Oglucuronide (346.90-1063.00 mg × 100 g-1 DM) as a dominant, which differentiated investigated clones at the highest degree (CV=0.27). Baicalin (391.40-942.00 mg × 100 g-1 DM), wogonoside (324.00-641.10 mg × 100 g-1 DM) and hesperetine 7-O-glucoside (163.00-346.32 mg × 100 g-1 DM) were also present in a considerable amounts. Clone 7 was distinguished by the highest content of all investigated compounds, except wogonin and oroxylin A 7-O-glucuronide. Conclusions: Results obtained in present study show a high variability within Baical skullcap investigated population in respect of flavonoid compounds detected in roots. Thus, the results may be used in future investigations concerning the selection and breeding of this species.
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Affiliation(s)
- Olga Kosakowska
- Laboratory of New Herbal Products Department of Vegetable and Medicinal Plants Warsaw University of Life Sciences – SGGW Nowoursynowska 166 02-787 Warsaw, Poland
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27
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Yuan J, Ji H, Xiao F, Lin Z, Zhao X, Wang Z, Zhao J, Lu J. MicroRNA-340 inhibits the proliferation and invasion of hepatocellular carcinoma cells by targeting JAK1. Biochem Biophys Res Commun 2016; 483:578-584. [PMID: 27998770 DOI: 10.1016/j.bbrc.2016.12.102] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 12/15/2016] [Indexed: 01/05/2023]
Abstract
Increasing evidence indicates that dysregulation of microRNAs (miRNAs) contributes to tumorigenesis. MicroRNA-340 (miR-340) is downregulated in several types of cancer. However, the functional mechanism of miR-340 in hepatocellular carcinoma (HCC) remains unclear. Here, we showed that miR-340 was significantly downregulated in HCC tissues and cell lines. Gain-of-function experiments demonstrated that miR-340 overexpression inhibited HCC cell proliferation, migration, and invasion in vitro, and suppressed tumor growth in vivo. Janus kinase 1 (JAK1) was identified as a direct target of miR-340 in HCC cells. Ectopic expression of JAK1 reversed the inhibitory effects of miR-340. Further investigations showed that miR-340 dramatically inhibited the expression of signal transducer and activator of transcription (STAT)3 downstream molecules including Bcl-2, cyclin D1, and matrix metalloprotease (MMP)-2. The present findings indicated that miR-340 suppressed HCC cell proliferation and invasion by regulating the JAK1/STAT3 pathway, suggesting its potential as a novel therapeutic target for HCC.
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Affiliation(s)
- Jianyong Yuan
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Hongxiang Ji
- The 2nd Department of Special Treatment, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Feng Xiao
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Zhipeng Lin
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Xijun Zhao
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Zhouchong Wang
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Jun Zhao
- The 2nd Department of Special Treatment, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China.
| | - Junhua Lu
- The 5th Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China.
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Kang MK, Park SH, Kim YH, Lee EJ, Antika LD, Kim DY, Choi YJ, Kang YH. Dietary Compound Chrysin Inhibits Retinal Neovascularization with Abnormal Capillaries in db/db Mice. Nutrients 2016; 8:nu8120782. [PMID: 27918469 PMCID: PMC5188437 DOI: 10.3390/nu8120782] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/23/2016] [Accepted: 11/28/2016] [Indexed: 12/13/2022] Open
Abstract
Diabetic retinopathy (DR) develops in a significant proportion of patients with chronic diabetes, characterized by retinal macular edema and abnormal retinal vessel outgrowth leading to vision loss. Chrysin, a naturally-occurring flavonoid found in herb and honeycomb, has anti-inflammatory, antioxidant, and anti-cancer properties. This study sought to determine the protective effects of chrysin on retinal neovascularization with abnormal vessels and blood-retinal barrier (BRB) breakdown in 33 mM glucose-exposed human retinal endothelial cells and in db/db mouse eyes. High glucose caused retinal endothelial apoptotic injury, which was inhibited by submicromolar chrysin. This compound diminished the enhanced induction of HIF-1α, vascular endothelial growth factor (VEGF), and VEGF receptor-2 (VEGFR2) in high glucose-exposed retinal endothelial cells. Consistently, oral administration of 10 mg/kg chrysin reduced the induction of these proteins in db/db mouse eye tissues. In addition, chrysin restored the decrement of VE-cadherin and ZO-1 junction proteins and PECAM-1 in hyperglycemia-stimulated retinal endothelial cells and diabetic mouse retina, possibly maintaining tight cell-cell interactions of endothelial cells and pericytes. Anti-apoptotic chrysin reduced the up-regulation of Ang-1, Ang-2, and Tie-2 crucial to retinal capillary occlusion and BRB permeability. Furthermore, orally treating chrysin inhibited acellular capillary formation, neovascularization, and vascular leakage observed in diabetic retinas. These observations demonstrate, for the first time, that chrysin had a capability to encumber diabetes-associated retinal neovascularization with microvascular abnormalities and BRB breakdown.
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Affiliation(s)
- Min-Kyung Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Sin-Hye Park
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Yun-Ho Kim
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Eun-Jung Lee
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Lucia Dwi Antika
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Dong Yeon Kim
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Yean-Jung Choi
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Young-Hee Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
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Yao J, Zhang YS, Feng GZ, Du Q. Chrysin inhibits human airway smooth muscle cells proliferation through the extracellular signal-regulated kinase 1/2 signaling pathway. Mol Med Rep 2016; 12:7693-8. [PMID: 26502995 DOI: 10.3892/mmr.2015.4401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 09/01/2015] [Indexed: 11/05/2022] Open
Abstract
Asthma is a chronic airway inflammatory disease characterized by an increased mass of airway smooth muscle (ASM). Chrysin (5,7-dihydroxyflavone), a natural flavonoid, has been shown to exert multiple biological activities, including anti-inflammatory, anti-proliferative and anti-oxidant effects, as well as the potency to ameliorate asthma in animal models. The objective of the present study was to identify the underlying mechanism of the therapeutic effects of chrysin. The impact of chrysin on basal and platelet-derived growth factor (PDGF)-induced proliferation and apoptosis of human airway smooth muscle cells (HASMCs) was investigated. Furthermore, the activation of the extracellular signal-regulated protein kinase (ERK) signaling pathway was evaluated in HASMCs. The results revealed that chrysin significantly inhibited basal as well as PDGF-induced HASMC proliferation, most likely through the suppression of ERK1/2 phosphorylation. However, chrysin did not significantly reduce PDGF-induced apoptosis of HASMCs. The present study indicated that chrysin may be a promising medication for controlling airway remodeling and clinical manifestations of asthma.
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Hsin IF, Lee JY, Huo TI, Lee FY, Huang HC, Hsu SJ, Wang SS, Ho HL, Lin HC, Lee SD. 2'-Hydroxyflavanone ameliorates mesenteric angiogenesis and portal-systemic collaterals in rats with liver fibrosis. J Gastroenterol Hepatol 2016; 31:1045-51. [PMID: 26474184 DOI: 10.1111/jgh.13197] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/16/2015] [Accepted: 09/22/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIM Portal-systemic collaterals lead to dreadful consequences in patients with cirrhosis. Angiogenesis participates in the development of liver fibrosis, hyperdynamic circulation, and portal-systemic collaterals. 2'-Hydroxyflavanone (2'-HF), one of the citrus fruits flavonoids, is known to have antiangiogenesis effect without adverse response. However, the relevant effects in liver fibrosis have not been surveyed. METHODS Male Wistar rats received thioacetamide (TAA, 100 mg/kg tiw, i.p.) for 6 weeks to induce liver fibrosis. On the 29th to 42nd day, rats randomly received 2'-HF (100 mg/kg, qod, i.p.) or vehicle (corn oil). On the 43rd day, after hemodynamic measurements, the followings were surveyed: (i) severity of collaterals; (ii) mesenteric angiogenesis; (iii) mesenteric proangiogenic factors protein expressions; (iv) Mesenteric vascular endothelial cells apoptosis; and (v) Mesenteric expressions of proteins regulating apoptosis. RESULTS Compared with the vehicle group, 2'-HF did not significantly change body weight, mean arterial pressure, heart rate, and portal pressure in TAA rats. 2'-HF significantly alleviated the severity of collaterals, but the mesenteric phospho-ERK, ERK, phospho-Akt, Akt, COX1, COX2, VEGF, and VEGFR-2 protein expressions were not altered. The apoptotic index of 2'-HF group was significantly higher and the mesenteric protein expressions of pro-apoptotic factors, NFkB 50, NFkB 65, Bax, phospho-p53, 17 kD cleaved caspase 3, and 17 kD casepase 3 were up-regulated. CONCLUSIONS 2'-HF does not influence the hemodynamics but alleviated the severity of collaterals in rats with liver fibrosis and early portal hypertension. This is, at least partly, attributed to enhanced apoptosis of mesenteric vascular endothelial cells.
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Affiliation(s)
- I-Fang Hsin
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Endoscopy Center for Diagnosis and Treatment, Taipei, Taiwan
| | - Jing-Yi Lee
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan
| | - Teh-Ia Huo
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Fa-Yauh Lee
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hui-Chun Huang
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shao-Jung Hsu
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Sun-Sang Wang
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Department of Medical Affair and Planning, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hsin-Ling Ho
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Han-Chieh Lin
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shou-Dong Lee
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Division of Gastroenterology, Department of Medicine, Cheng Hsin General Hospital, Taipei, Taiwan
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31
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Cui Y, Sun S, Ren K, Quan M, Song Z, Zou H, Li D, Cao J. Reversal of liver cancer-associated stellate cell-induced stem-like characteristics in SMMC-7721 cells by 8-bromo-7-methoxychrysin via inhibiting STAT3 activation. Oncol Rep 2016; 35:2952-62. [PMID: 26935885 DOI: 10.3892/or.2016.4637] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 12/27/2015] [Indexed: 11/05/2022] Open
Abstract
Hepatic stellate cells (HSCs) that are activated by human hepatocellular carcinoma (HCC) cells secrete a variety of cytokines, which are the main component of the HCC microenvironment. We aimed to determine whether 8-bromo-7-methoxychrysin (BrMC) could interfere in cross-talk of the human hepatic stellate cell line LX-2 and liver cancer stem-like cells (LCSLCs) to inhibit the characteristics of LCSLCs endowed with the capacity of sustaining human hepatocellular carcinoma (HCC) self-renewal and progression, and to identify its potential mechanism of action. We found that the levels of fibroblast activation protein (FAP) were augmented in LX-2 cells treated with the conditioned medium of LCSLCs (LCSLC-CM) compared to those cultured with routine medium, indicating that the LCSLC-CM can activate LX-2 cells to become liver cancer-associated stellate cells (LCAHSCs). Furthermore, sphere forming capability of SMMC-7721 cells was enhanced and stem cell-related protein expression was significantly increased following treatment with the conditioned medium of LCAHSCs (LCAHSC-CM). Moreover, the level of p-STAT3 was increased in LX-2 cells treated with LCSLC-CM and BrMC reduced expression of p-STAT3. Combination of BrMC and the selective inhibitor of STAT3 cucurbitacin I (JSI-124) synergistically suppressed the LCSLC characteristics in SMMC-7721 cells. Collectively, our data showed that BrMC inhibited the interaction between LX-2 cells and HCC-derived CSCs, and did so potentially through modulation of the STAT3 pathway. Future therapeutic strategies employing anti-CSC therapy should confirm the potential of cucurbitacin I (JSI-124) and BrMC as potent therapeutic agents.
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Affiliation(s)
- Yinghong Cui
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Shuwen Sun
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Kaiqun Ren
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Meifang Quan
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Zhenwei Song
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Hui Zou
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Duo Li
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
| | - Jianguo Cao
- Department of Pharmaceutical Science, Medical College, Hunan Normal University, Changsha, Hunan 410013, P.R. China
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32
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Li YQ, Yang F, Wang L, Cao Z, Han TJ, Duan ZA, Li Z, Zhao WJ. Phosphoramidate protides of five flavones and their antiproliferative activity against HepG2 and L-O2 cell lines. Eur J Med Chem 2016; 112:196-208. [PMID: 26896708 DOI: 10.1016/j.ejmech.2016.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 01/21/2016] [Accepted: 02/04/2016] [Indexed: 10/22/2022]
Abstract
A series of flavone-7-phosphoramidate derivatives were synthesized and tested for their antiproliferative activity in vitro against human hepatoma cell line HepG2 and human normal hepatic cell line L-O2. Compound 8d, 16d and 17d, incorporating the amino acid alanine, exhibited high inhibitory activity on HepG2 cell line with IC50 values of 9.0 μmol/L, 5.5 μmol/L and 6.6 μmol/L. The introduction of acyl groups played a pivotal role in the selective inhibition toward human hepatoma HepG2 cells, except for compound 8a, 9a and 16b. Compound 8d, 16d and 17d could significantly induce G2/M arrest in HepG2 cells. Specially, Compound 16d could lead early apoptosis in HepG2 cells.
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Affiliation(s)
- Yue-Qing Li
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Fei Yang
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Liu Wang
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Zhi Cao
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Tian-Jiao Han
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Zhe-Ang Duan
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Zhen Li
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Wei-Jie Zhao
- School of Pharmaceutical Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
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Sun B, Chen L, Fu H, Guo L, Guo H, Zhang N. Upregulation of RICTOR gene transcription by the proinflammatory cytokines through NF-κB pathway contributes to the metastasis of renal cell carcinoma. Tumour Biol 2015; 37:4457-66. [PMID: 26500094 DOI: 10.1007/s13277-015-4296-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 10/20/2015] [Indexed: 12/12/2022] Open
Abstract
Metastasis accounts for more than 50 % of deaths among renal cell carcinoma (RCC) patients, and therefore, it is important to study the biology of metastasis and identify metastasis-associated biomarkers for risk prognosis and stratification of patients for an individualized therapy of RCC. In cultured RCC cells, knockdown of Rictor by short hairpin RNA (shRNA) inhibited cell migration and invasion, probably due to impairments in activation of Akt. Pretreatment with tumor necrosis factor α (TNFα) or interleukin 6 (IL-6) enhanced the expression of Rictor and the migration of renal cancer cells. Mechanistic analysis showed that TNFα induced the activation of NF-κB in RCC cells. Luciferase reporter analysis revealed a NF-κB responding element (-301 to -51 bp) at the promoter region of Rictor. Chromatin immunoprecipitation (ChIP) analysis further confirmed that TNFα-induced binding of p65 with the promoter of Rictor. In a xenograft model, knockdown of Rictor-blocked RCC cells metastasis to the mouse lungs and livers. Taken together, our results suggest that the proinflammatory cytokine TNFα promotes the expression of Rictor through the NF-κB pathway.
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Affiliation(s)
- Bo Sun
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China
| | - Liwei Chen
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China
| | - Hui Fu
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China
| | - Lin Guo
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China
| | - Hua Guo
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China.
| | - Ning Zhang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, People's Republic of China. .,Research Center of Basic Medical Science, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, 300070, People's Republic of China.
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Singh P, Tomar RS, Rath SK. Anticancer potential of the histone deacetylase inhibitor-like effects of flavones, a subclass of polyphenolic compounds: a review. Mol Biol Rep 2015; 42:1515-31. [PMID: 26033434 DOI: 10.1007/s11033-015-3881-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 10/30/2014] [Indexed: 12/26/2022]
Abstract
Cancer is characterized by the uncontrolled division of cells, followed by their invasion to other tissues. These kinds of cellular abnormalities arise as a result of the accumulation of genetic mutations or epigenetic alterations. Targeting genetic mutations by drugs is a conventional treatment approach. Nowadays, the development and use of epigenetic drugs are burgeoning, owing to the advancements in epigenetic research. The therapeutic intervention of cancer development by histone deacetylase inhibitors (HDACIs) holds promise for helping to control the disease, but their nonspecific functions impose certain side effects. Therefore, the search for more HDACIs becomes essential. Plentiful literature on the versatility of dietary components including flavones, a class of the flavonoid group, has already established these compounds to be better anticancer agents. The present review focuses on the significance of flavones with regard to their HDACI-mimicking effects as suggested by the recent evidences. The review also proposes an in-depth screening of flavones in future studies, in the hope that flavones may provide a better alternative to synthetic HDACIs.
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Affiliation(s)
- Prabhat Singh
- Department of Biological Sciences, Indian Institute of Science Education & Research Bhopal (IISER Bhopal), I.T.I. Transit Campus, Govindpura, Bhopal, 462023, M.P., India.
| | - Raghuvir Singh Tomar
- Department of Biological Sciences, Indian Institute of Science Education & Research Bhopal (IISER Bhopal), I.T.I. Transit Campus, Govindpura, Bhopal, 462023, M.P., India
| | - Srikanta Kumar Rath
- Division of Toxicology, CSIR-Central Drug Research Institute, Lucknow, India
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35
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Xia Y, Lian S, Khoi PN, Yoon HJ, Joo YE, Chay KO, Kim KK, Do Jung Y. Chrysin inhibits tumor promoter-induced MMP-9 expression by blocking AP-1 via suppression of ERK and JNK pathways in gastric cancer cells. PLoS One 2015; 10:e0124007. [PMID: 25875631 PMCID: PMC4398353 DOI: 10.1371/journal.pone.0124007] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 03/09/2015] [Indexed: 12/12/2022] Open
Abstract
Cell invasion is a crucial mechanism of cancer metastasis and malignancy. Matrix metalloproteinase-9 (MMP-9) is an important proteolytic enzyme involved in the cancer cell invasion process. High expression levels of MMP-9 in gastric cancer positively correlate with tumor aggressiveness and have a significant negative correlation with patients’ survival times. Recently, mechanisms suppressing MMP-9 by phytochemicals have become increasingly investigated. Chrysin, a naturally occurring chemical in plants, has been reported to suppress tumor metastasis. However, the effects of chrysin on MMP-9 expression in gastric cancer have not been well studied. In the present study, we tested the effects of chrysin on MMP-9 expression in gastric cancer cells, and determined its underlying mechanism. We examined the effects of chrysin on MMP-9 expression and activity via RT-PCR, zymography, promoter study, and western blotting in human gastric cancer AGS cells. Chrysin inhibited phorbol-12-myristate 13-acetate (PMA)-induced MMP-9 expression in a dose-dependent manner. Using AP-1 decoy oligodeoxynucleotides, we confirmed that AP-1 was the crucial transcriptional factor for MMP-9 expression. Chrysin blocked AP-1 via suppression of the phosphorylation of c-Jun and c-Fos through blocking the JNK1/2 and ERK1/2 pathways. Furthermore, AGS cells pretreated with PMA showed markedly enhanced invasiveness, which was partially abrogated by chrysin and MMP-9 antibody. Our results suggest that chrysin may exert at least part of its anticancer effect by controlling MMP-9 expression through suppression of AP-1 activity via a block of the JNK1/2 and ERK1/2 signaling pathways in gastric cancer AGS cells.
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Affiliation(s)
- Yong Xia
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Sen Lian
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Pham Ngoc Khoi
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Hyun Joong Yoon
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Young Eun Joo
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Kee Oh Chay
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Kyung Keun Kim
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Young Do Jung
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju, Republic of Korea
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Ran J, Wang Y, Zhang W, Ma M, Zhang H. Research on the bioactivity of isoquercetin extracted from marestail on bladder cancer EJ cell and the mechanism of its occurrence. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:859-64. [PMID: 25650648 DOI: 10.3109/21691401.2014.998823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Research studies in recent years have found that isoquercetin has an inhibiting effect on multiple carcinogens, but research studies filed on isoquercetin in bladder cancer are quite few. This paper observed the influence of isoquercetin on biological activity of the EJ cell of bladder cancer through HC dyeing and trypan blue counting, studied the EJ cell cycle by flow cytometry (FCM), and then analyzed the influence of isoquercetin and its effect on the protein expression of STAT3 and STAT3-inhibiting factors (PIAS3) in EJ cells. Research has shown that isoquercetin has an inhibitory effect on the EJ cells of bladder cancer, but it is not obvious.
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Affiliation(s)
- Juhong Ran
- a Department of Anesthesiology , The First Affiliated Hospital of Zhengzhou University , No.1 East-JianShe Road, Zhengzhou, Henan , China
| | - Yanping Wang
- a Department of Anesthesiology , The First Affiliated Hospital of Zhengzhou University , No.1 East-JianShe Road, Zhengzhou, Henan , China
| | - Wei Zhang
- a Department of Anesthesiology , The First Affiliated Hospital of Zhengzhou University , No.1 East-JianShe Road, Zhengzhou, Henan , China
| | - Minyu Ma
- a Department of Anesthesiology , The First Affiliated Hospital of Zhengzhou University , No.1 East-JianShe Road, Zhengzhou, Henan , China
| | - Haiying Zhang
- b Yantai Hill Hospital of Yantai City , Shandong , China
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Xia Y, Lian S, Khoi PN, Yoon HJ, Han JY, Chay KO, Kim KK, Jung YD. Chrysin inhibits cell invasion by inhibition of Recepteur d'origine Nantais via suppressing early growth response-1 and NF-κB transcription factor activities in gastric cancer cells. Int J Oncol 2015; 46:1835-43. [PMID: 25625479 DOI: 10.3892/ijo.2015.2847] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 12/23/2014] [Indexed: 11/05/2022] Open
Abstract
Cell invasion is one of crucial reasons for cancer metastasis and malignancy. Recepteur d'origine Nantais (RON) has been reported to play an important role in the cancer cell invasion process. High accumulation and activation of RON has been implicated in gastric adenocarcinoma AGS cells. Chrysin is a naturally occurring phytochemical, a type of flavonoid, which has been reported to suppress tumor metastasis. However, the effects of chrysin on RON expression in gastric cancer are not well studied. In the present study, we examined whether chrysin affects RON expression in gastric cancer, and if so, its underlying mechanism. We examined the effect of chrysin on RON expression and activity, via RT-PCR, promoter study, and western blotting in human gastric cancer AGS cells. Chrysin significantly inhibited endogenous and inducible RON expression in a dose-dependent manner. After demonstrating that Egr-1 and NF-κB are the critically required transcription factors for RON expression, we discovered that chrysin suppressed Egr-1 and NF-κB transcription factor activities. Additionally, the phorbol-12-myristate-13-acetate- (PMA) induced cell invasion was partially abrogated by chrysin and an RON antibody. Our results suggest that chrysin has anticancer effects at least by suppressing RON expression through blocking Egr-1 and NF-κB in gastric cancer AGS cells.
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Affiliation(s)
- Yong Xia
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Sen Lian
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Pham Ngoc Khoi
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Hyun Joong Yoon
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Jae Young Han
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Kee Oh Chay
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Kyung Keun Kim
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Young Do Jung
- Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
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Jiang B, Zhao A, Miao J, Chang P, Chen H, Pan W, Lin C. Molecular Docking and Reaction Kinetic Studies of Chrysin Binding to Serum Albumin. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The binding properties of chrysin with serum albumin (SA) were investigated under physiological conditions by calorimetry, circular dichroism (CD) spectroscopy, and molecular modeling. Based on the thermodynamic data, molar reaction enthalpy, reaction order ( n) and the rate constant ( k) were calculated. The results of CD spectroscopy showed that chrysin could bind to SA and the conformation of SA did not have any high-ordered structural change. Computational mapping revealed chrysin binding to the subdomain IB in SA. The chrysin-serum albumin complex was stabilized by hydrophobic force and hydrogen bonding and the reaction was a spontaneous process.
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Affiliation(s)
- Bingli Jiang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 P. R. China
| | - Anran Zhao
- Department of Chemistry, College of Sciences and Health Professions, Cleveland State University, Cleveland OH 44115, USA
| | - Jianhua Miao
- Guangxi Botanical Garden of Medicinal Plants, Nanning, Guangxi, 530004, P. R. China
| | - Pengfei Chang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 P. R. China
| | - Hailin Chen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 P. R. China
| | - Weigao Pan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 P. R. China
- Guangxi Botanical Garden of Medicinal Plants, Nanning, Guangxi, 530004, P. R. China
| | - Cuiwu Lin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 P. R. China
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Tian SS, Jiang FS, Zhang K, Zhu XX, Jin B, Lu JJ, Ding ZS. Flavonoids from the leaves of Carya cathayensis Sarg. inhibit vascular endothelial growth factor-induced angiogenesis. Fitoterapia 2014; 92:34-40. [DOI: 10.1016/j.fitote.2013.09.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 09/21/2013] [Accepted: 09/25/2013] [Indexed: 01/14/2023]
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Lirdprapamongkol K, Sakurai H, Abdelhamed S, Yokoyama S, Maruyama T, Athikomkulchai S, Viriyaroj A, Awale S, Yagita H, Ruchirawat S, Svasti J, Saiki I. A flavonoid chrysin suppresses hypoxic survival and metastatic growth of mouse breast cancer cells. Oncol Rep 2013; 30:2357-64. [PMID: 23969634 DOI: 10.3892/or.2013.2667] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 07/15/2013] [Indexed: 11/06/2022] Open
Abstract
Tumor hypoxia commonly occurs in solid tumors, and correlates with metastasis. Current cancer therapies are inefficient in curing metastatic disease. Herein, we examined effect of Thai propolis extract and its major constituent, chrysin, on hypoxic survival of 4T1 mouse breast cancer cells in vitro, and investigated its underlying mechanism. In vivo effect of chrysin on metastatic progression of cancer cells was studied, both as a single agent and in combination with another antimetastatic agent, agonistic monoclonal antibody targeting the DR5 TRAIL receptor (DR5 mAb). Thai propolis extract and chrysin decreased survival of 4T1 cells after exposure to hypoxia (1% O2), for 2 days. Immunoblot analysis revealed that chrysin inhibited hypoxia-induced STAT3 phosphorylation without affecting HIF-1α protein level. Chrysin also abrogated hypoxia-induced VEGF gene expression as determined by qRT-PCR. The in vivo effect of chrysin was determined in a spontaneous metastasis mouse model of breast cancer, either alone or in combination with DR5 mAb. Daily oral administration of chrysin in Balb/c mice implanted with 4T1 cells significantly suppressed growth of lung metastatic colonies. Moreover, antimetastatic activity of DR5 mAb was enhanced when given in combination with chrysin. We demonstrate that chrysin has potential in controlling metastatic progression.
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LPLUNC1 suppresses IL-6-induced nasopharyngeal carcinoma cell proliferation via inhibiting the Stat3 activation. Oncogene 2013; 33:2098-109. [PMID: 23708661 DOI: 10.1038/onc.2013.161] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/02/2013] [Accepted: 03/14/2013] [Indexed: 12/28/2022]
Abstract
Tumor-associated macrophage (TAM)-related chronic inflammation and interleukin-6 (IL-6) contribute to the progression of nasopharyngeal carcinoma (NPC). In this study, we characterized TAMs and IL-6 expression in 212 biopsied NPC and 119 non-tumor nasopharyngeal epithelium (NPE) tissues by tissue array. In comparison with that in the NPE tissues, more TAM infiltrates and a higher density of IL-6 expression were detected in NPC tissues, which were associated with the poor survival of NPC patients. In contrast, little or no LPLUNC1, a regulator of inflammation, expression was detected in NPC tissues, and the levels of LPLUNC1 expression in the NPC were associated negatively with the numbers of TAMs and the levels of IL-6 expression, but positively with the survival of NPC patients. Induction of LPLUNC1 overexpression in NPC cells mitigated lipopolysaccharide (LPS)-induced IL-6, IL-8, tumor necrosis factor-α and IL-1β expression or treatment of THP-1 macrophages with LPLUNC1 inhibited spontaneous and LPS-induced IL-6 expression in vitro. IL-6-promoted NPC cell proliferation in a dose- and time-dependent manner, accompanied by increasing cyclin D1 and Bcl-2 expression and the Stat3 activation, but inhibiting Bax and p21 expression. Induction of LPLUNC1 overexpression inhibited NPC cell proliferation, induced NPC cell arrest, promoted NPC cell apoptosis even after IL-6 stimulation and inhibited the growth of implanted NPC tumors in vivo, which were associated with decreasing cyclin D1 and Bcl-2 expression and the Janus kinase 2 (JAK2)/Stat3 activation, but enhancing Bax and p21 expression. These results suggest that LPLUNC1 can inhibit inflammation and NPC growth by downregulating the Stat3 pathway.
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Moriasi C, Subramaniam D, Awasthi S, Ramalingam S, Anant S. Prevention of colitis-associated cancer: natural compounds that target the IL-6 soluble receptor. Anticancer Agents Med Chem 2013; 12:1221-38. [PMID: 22583410 DOI: 10.2174/187152012803833080] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 01/20/2012] [Accepted: 01/20/2012] [Indexed: 12/17/2022]
Abstract
The risk of developing colorectal cancer increases in patients with inflammatory bowel disease (IBD) and a growing body of evidence shows the critical role of interleukin (IL-6) in this process. IL-6 is both a pro- and anti-inflammatory cytokine whose effects are mediated through activation of STAT3. Recent studies have also demonstrated that IL-6 trans-signaling through its soluble receptor occurs in IBD and cancer. IL-6 trans-signaling therefore is emerging as an attractive approach to diminish the inflammatory signals in conditions of chronic inflammation. The purpose of cancer chemoprevention is to either delay the onset or progression from precancerous lesions. Natural compounds because of their low toxicity render themselves excellent candidates that can be administered over the lifetime of an individual. With the focus of managing IBD over a long time and preventing onset of colitis-associated cancer, we believe that there should be increased research focus on identifying chemopreventive compounds that can render themselves to long term use possibly for the lifetime of predisposed individuals. Here, we review the role of IL-6 signaling in IBD and colitis-associated cancer and underscore the importance of searching for natural compounds that would target the IL-6 trans-signaling pathway as a way to diminish chronic inflammatory conditions in the gastrointestinal tract and possibly hamper the progression to colon cancer. We propose that effective screening and identification of natural chemopreventive compounds that target IL-6 trans-signaling has important implications for the development of optimal strategies against cancer development triggered by inflammation.
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Affiliation(s)
- Cate Moriasi
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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García-Vilas JA, Quesada AR, Medina MÁ. 4-methylumbelliferone inhibits angiogenesis in vitro and in vivo. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4063-4071. [PMID: 23581646 DOI: 10.1021/jf303062h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
4-Methylumbelliferone (4-MU) is a hyaluronic acid biosynthesis inhibitor with antitumoral and antimetastatic effects. The objective of the present study was to determine the potential of 4-MU as an antiangiogenic compound. To fulfill this aim, cultured endothelial cells were used to perform an array of in vitro assays, as well as two different in vivo angiogenesis assays. This study demonstrates that, in fact, 4-MU behaves as a new inhibitor of both in vitro and in vivo angiogenesis. In vitro, 4-MU affects several key steps of angiogenesis, including endothelial cell proliferation, adhesion, tube formation, and extracellular matrix remodeling. Half-maximal inhibitory concentrations (IC50) values in the proliferation assay were 0.65 ± 0.04 and 0.37 ± 0.03 mM for HMEC and RF-24 endothelial cells, respectively. 4-MU (2 mM) treatment for 24 h induced apoptosis in 13% of HMEC and 5% of RF-24 cells. The number of adherent endothelial cells decreased by >20% after 24 h of treatment with 1 mM 4-MU. Minimal inhibitory concentrations in the tube formation assay were 2 and 0.5 mM 4-MU for HMEC and RF-24, respectively. Matrix metalloproteinase-2 expression was differentially altered upon 4-MU treatment in both tested endothelial cell lines. Taken together, the results suggest that 4-MU may have potential as a new candidate multitargeted bioactive compound for antiangiogenic therapy.
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Lin CM, Chen YH, Ma HP, Wang BW, Chiu JH, Chua SK, Ong JR, Shyu KG. Silibinin inhibits the invasion of IL-6-stimulated colon cancer cells via selective JNK/AP-1/MMP-2 modulation in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:12451-12457. [PMID: 23210512 DOI: 10.1021/jf300964f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Silibinin is a flavonoid with antihepatotoxic properties and pleiotropic anticancer capabilities. This study investigated silibinin inhibition of cell invasion by down-regulating matrix metalloproteinase-2 (MMP-2) expression, via attenuation of activator protein-1 (AP-1) in IL-6-stimulated LoVo colon cancer cells. Western blot data showed that the expression of MMP-2 protein was reduced 1.6- or 1.7-fold over the control by treatment with silibinin or JNK inhibitor in the models. Similar results were revealed in zymography and confocal microscopy. Pretreatment with silibinin also abolished the binding activity of AP-1 and MMP-2 promoter activity via AP-1 binding, as observed by EMSA and luciferase assay. Finally, a [(3)H]-thymidine incorporation proliferation assay and cell migration assay demonstrated that silibinin inhibited IL-6-stimulated LoVo cell proliferation and invasion. Taken together, these data indicated that silibinin inhibits LoVo cell invasion with the reduction of MMP-2 presentation by attenuating AP-1 binding activity, suggesting a novel antimetastatic application for silibinin in colon cancer chemoprevention.
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Affiliation(s)
- Chiu-Mei Lin
- Department of Emergency Medicine, Shin Kong Wu Ho-Su Memorial Hospital , Taipei, Taiwan
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Zhao X, Shu G, Chen L, Mi X, Mei Z, Deng X. A flavonoid component from Docynia delavayi (Franch.) Schneid represses transplanted H22 hepatoma growth and exhibits low toxic effect on tumor-bearing mice. Food Chem Toxicol 2012; 50:3166-73. [PMID: 22687553 DOI: 10.1016/j.fct.2012.05.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 04/10/2012] [Accepted: 05/23/2012] [Indexed: 01/22/2023]
Abstract
The fruit of Docynia delavayi (Franch.) Schneid is a kind of popular food in southwestern areas of China. Additionally, its rhizome has been long used as a folk medicine in the treatment of liver cancer by local people. Chrysin is a kind of flavonoid which induces cancer cell death in vitro. However, its anti-tumor activity in vivo and toxicological effects on the tumor-bearing animals still remain poorly understood. In this study, we obtained four flavonoids from this herb. Among them, chrysin showed the strongest cytotoxic effect on an array of cultured tumor cells. Further investigations revealed that it significantly repressed transplanted H22 ascitic hepatic tumor cell growth in vivo. Moreover, this compound displayed little toxic effects. Additionally, we demonstrated that in transplanted tumor tissues, chrysin not only activated caspase-3 and induced apoptosis, but also inhibited the production of vascular endothelial growth factor (VEGF) and suppressed angiogenesis. These data showed that chrysin exhibited prominent anti-tumor activities and low toxic effects in vivo.
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Affiliation(s)
- Xiangpei Zhao
- School of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China
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46
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Rhee YH, Jeong SJ, Lee HJ, Lee HJ, Koh W, Jung JH, Kim SH, Sung-Hoon K. Inhibition of STAT3 signaling and induction of SHP1 mediate antiangiogenic and antitumor activities of ergosterol peroxide in U266 multiple myeloma cells. BMC Cancer 2012; 12:28. [PMID: 22260501 PMCID: PMC3292511 DOI: 10.1186/1471-2407-12-28] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 01/20/2012] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Ergosterol peroxide (EP) derived from edible mushroom has been shown to exert anti-tumor activity in several cancer cells. In the present study, anti-angiogenic activity of EP was investigated with the underlying molecular mechanisms in human multiple myeloma U266 cells. RESULTS Despite weak cytotoxicity against U266 cells, EP suppressed phosphorylation, DNA binding activity and nuclear translocalization of signal transducer and activator of transcription 3 (STAT3) in U266 cells at nontoxic concentrations. Also, EP inhibited phosphorylation of the upstream kinases Janus kinase 2 (JAK2) and Src in a time-dependent manner. Furthermore, EP increased the expression of protein tyrosine phosphatase SHP-1 at protein and mRNA levels, and conversely silencing of the SHP-1 gene clearly blocked EP-mediated STAT3 inactivation. In addition, EP significantly decreased vascular endothelial growth factor (VEGF), one of STAT3 target genes at cellular and protein levels as well as disrupted in vitro tube formation assay. Moreover, EP significantly suppressed the growth of U266 cells inoculated in female BALB/c athymic nude mice and immunohistochemistry revealed that EP effectively reduced the expression of STAT3 and CD34 in tumor sections compared to untreated control. CONCLUSION These findings suggest that EP can exert antitumor activity in multiple myeloma U266 cells partly with antiangiogenic activity targeting JAK2/STAT3 signaling pathway as a potent cancer preventive agent for treatment of multiple myeloma cells.
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Affiliation(s)
- Yun-Hee Rhee
- Clinical Trial Institute, Dankook University, Chenan, South Korea
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Lin CM, Chen YH, Ong JR, Ma HP, Shyu KG, Bai KJ. Functional Role of Wogonin in Anti-Angiogenesis. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2012; 40:415-427. [DOI: 10.1142/s0192415x12500322] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Constitutive activation of the Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway occurs commonly in cancer cells and endothelial cells, and contributes to angiogenesis. Wogonin is a compound with many biologically relevant properties. We previously reported that wogonin blocked IL-6-induced angiogenesis through suppression of VEGF expression, an important regulator of angiogenesis. However, the pathway involved in the suppressive effect of wogonin on IL-6-induced VEGF has not been completely clarified. This study aimed to investigate the molecular mechanisms participating in the suppression of wogonin on IL-6-induced VEGF in vitro, focusing on IL-6R/JAK1/STAT3/VEGF pathway. Both STAT3 siRNA and wogonin treatment resulted in an abolition of the expression of VEGF. Moreover, our data revealed that wogonin treatment after STAT3 knock-down did not further suppress VEGF expression. The addition of IL-6R siRNA or wogonin resulted in a decrease in the expression level of the phosphorylated JAK1 protein. Furthermore, wogonin significantly decreased the amount of phosphorylated STAT3. Finally, by EMSA, wogonin suppressed IL-6-induced STAT3 binding activity in a concentration-dependent manner. Taken together, our results show that wogonin suppresses IL-6-induced VEGF by modulating the IL-6R/JAK1/STAT3 signaling pathway. Based on this study, we suggest that wogonin may provide a new potential therapeutic option for treatment of IL-6-related pathological angiogenesis.
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Affiliation(s)
- Chiu-Mei Lin
- Department of Emergency Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taiwan
- Institute of Biotechnology, National Ilan University, Taiwan
- Institute of Injury Prevention and Control, College of Public Health, Taipei Medical University, Taiwan
| | - Yen-Hsu Chen
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan
- Graduate Institute of Medicine, Tropical Medicine Research Center, College of Medicine, Kaohsiung Medical University, Taiwan
| | - Jiann-Ruey Ong
- Department of Emergency Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taiwan
| | - Hon-Ping Ma
- Faculty of Medicine, College of Medicine, Taipei Medical University, Taiwan
| | - Kou-Gi Shyu
- Division of Cardiology, Department of Internal Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taiwan
| | - Kuan-Jen Bai
- Faculty of Medicine, College of Medicine, Taipei Medical University, Taiwan
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Georgi MK, Vigilance J, Dewar AM, Frame MD. Terminal arteriolar network structure/function and plasma cytokine levels in db/db and ob/ob mouse skeletal muscle. Microcirculation 2011; 18:238-51. [PMID: 21418374 DOI: 10.1111/j.1549-8719.2011.00084.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To investigate the terminal arteriolar network structure and function in relation to circulating plasma cytokine levels in db/db, ob/ob, and their genetic background control, C57/bl6, mice. METHODS Arteriolar network size and erythrocyte distribution were observed in the resting cremaster muscle (n = 45, pentobarbital 50 mg/kg i.p.). Structural remodeling and inflammatory state were related to 21 plasma cytokine levels. RESULTS db/db networks were shorter, had fewer branches, and smaller diameters than C57/bl6 controls. ob/ob networks were longer, with similar branch numbers, however with non-uniform diameters. Shunting of erythrocytes to the specific terminal arteriolar branches of the network (functional rarefaction) was prominent in db/db and ob/ob, with further evidence of shunting between networks seen as no flow to 50% of ob/ob arteriolar networks. CONCLUSIONS Altered levels of plasma cytokines are consistent with structural remodeling seen in db/db, and a pro-inflammatory state for both db/db and ob/ob. Differences in network structure alone predict overall reduced uniform oxygen delivery in db/db or ob/ob. Shunting probably increases heterogeneous oxygen delivery and is strain-dependent.
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Affiliation(s)
- Melissa K Georgi
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York 11794-5281, USA
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49
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Hypoxia effects on proangiogenic factors in human umbilical vein endothelial cells: functional role of the peptide somatostatin. Naunyn Schmiedebergs Arch Pharmacol 2011; 383:593-612. [DOI: 10.1007/s00210-011-0625-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 03/23/2011] [Indexed: 12/15/2022]
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