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Zhao R, Zhou X, Zhao Z, Liu W, Lv M, Zhang Z, Wang C, Li T, Yang Z, Wan Q, Xu R, Cui Y. Farrerol Alleviates Cerebral Ischemia-Reperfusion Injury by Promoting Neuronal Survival and Reducing Neuroinflammation. Mol Neurobiol 2024; 61:7239-7255. [PMID: 38376762 DOI: 10.1007/s12035-024-04031-9] [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: 08/06/2023] [Accepted: 02/10/2024] [Indexed: 02/21/2024]
Abstract
Ischemia-reperfusion (I/R) injury is a key influencing factor in the outcome of stroke. Inflammatory response, oxidative stress, and neuronal apoptosis are among the main factors that affect the progression of I/R injury. Farrerol (FAR) is a natural compound that can effectively inhibit the inflammatory response and oxidative stress. However, the role of FAR in cerebral I/R injury remains unknown. In this study, we found that FAR reduced brain injury and neuronal viability after cerebral I/R injury. Meanwhile, administration of FAR also reduced the inflammatory response of microglia after brain injury. Mechanistically, FAR treatment directly reduced neuronal death after oxygen glucose deprivation/re-oxygenation (OGD/R) through enhancing cAMP-response element binding protein (CREB) activation to increase the expression of downstream neurotrophic factors and anti-apoptotic genes. Moreover, FAR decreased the activation of nuclear factor kappa-B (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathways, inhibited microglia activation, and reduced the production of inflammatory cytokines in microglia after OGD/R treatment or LPS stimulation. The compromised inflammatory response by FAR directly promoted the survival of neurons after OGD/R. In conclusion, FAR exerted a protective effect on cerebral I/R injury by directly decreasing neuronal death through upregulating CREB expression and attenuating neuroinflammation. Therefore, FAR could be a potentially effective drug for the treatment of cerebral I/R injury.
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Affiliation(s)
- Rui Zhao
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Xin Zhou
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Ningxia Road 308, Qingdao, 266071, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Zhiyuan Zhao
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Wenhao Liu
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Mengfei Lv
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Ningxia Road 308, Qingdao, 266071, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Zhaolong Zhang
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
| | - Changxin Wang
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Tianli Li
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Zixiong Yang
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China
| | - Qi Wan
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Ningxia Road 308, Qingdao, 266071, Shandong, China
| | - Rui Xu
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China.
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China.
| | - Yu Cui
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Ningxia Road 308, Qingdao, 266071, Shandong, China.
- Qingdao Medical College, Qingdao University, Qingdao, 266071, China.
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Gao J, Cang X, Liu L, Lin J, Zhu S, Liu L, Liu X, Zhu J, Xu C. Farrerol alleviates insulin resistance and hepatic steatosis of metabolic associated fatty liver disease by targeting PTPN1. J Cell Mol Med 2024; 28:e70096. [PMID: 39289804 PMCID: PMC11408267 DOI: 10.1111/jcmm.70096] [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: 01/30/2024] [Revised: 08/29/2024] [Accepted: 09/04/2024] [Indexed: 09/19/2024] Open
Abstract
Metabolic associated fatty liver disease (MAFLD) is the most common chronic liver disease worldwide, characterized by excess lipid deposition. Insulin resistance (IR) serves as a fundamental pathogenic factor in MAFLD. However, currently, there are no approved specific agents for its treatment. Farrerol, a novel compound with antioxidant and anti-inflammatory effects, has garnered significant attention in recent years due to its hepatoprotective properties. Despite this, the precise underlying mechanisms of action remain unclear. In this study, a network pharmacology approach predicted protein tyrosine phosphatase non-receptor type 1 (PTPN1) as a potential target for farrerol's action in the liver. Subsequently, the administration of farrerol improved insulin sensitivity and glucose tolerance in MAFLD mice. Furthermore, farrerol alleviated lipid accumulation by binding to PTPN1 and reducing the dephosphorylation of the insulin receptor (INSR) in HepG2 cells and MAFLD mice. Thus, the phosphoinositide 3-kinase/serine/threonine-protein kinases (PI3K/AKT) signalling pathway was active, leading to downstream protein reduction. Overall, the study demonstrates that farrerol alleviates insulin resistance and hepatic steatosis of MAFLD by targeting PTPN1.
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Affiliation(s)
- Jingwen Gao
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Xiaomin Cang
- Department of EndocrinologyAffiliated Hospital 2 of Nantong University and First People's Hospital of Nantong CityNantongChina
| | - Lu Liu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Jiaxi Lin
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Shiqi Zhu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Lihe Liu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Xiaolin Liu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Jinzhou Zhu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
| | - Chunfang Xu
- Department of GastroenterologyThe First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina
- Suzhou Clinical Center of Digestive DiseasesSuzhouChina
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Daneshi M, Caton JS, Caixeta LS, Eftekhari Z, Ward AK. Expression, Regulation, and Function of β-Defensins in the Bovine Mammary Glands: Current Knowledge and Future Perspectives. Animals (Basel) 2023; 13:3372. [PMID: 37958127 PMCID: PMC10650070 DOI: 10.3390/ani13213372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/27/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
β-Defensins are cationic antimicrobial peptides (AMPs) that play an important role in the innate immune defense of bovines. They are constitutively expressed in mammary glands and induced differently in response to pathogens. Their expression is influenced by various factors, including hormones, plant-derived compounds, and dietary energy imbalance. The toll-like receptors (TLRs)/nuclear factor-kappa B (NF-κB) pathway plays a crucial role in β-defensin induction, while alternative pathways such as mitogen-activated protein kinase (MAPK) and epigenetic regulation also make substantial contributions. β-Defensins exhibit bactericidal activity against a wide range of pathogens, including two major mastitis pathogens, Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), primarily through membrane disruption. β-Defensins have low cytotoxicity to host cells and demonstrate immunomodulatory properties, and pathogens also display minimal resistance to these AMPs. Given the increasing concern in antimicrobial resistance, the potential of β-defensins as natural antimicrobials has garnered considerable attention. This article provides an overview of the characteristics of bovine β-defensins, their expression pathways, their mode of action, and factors influencing their expression in the mammary glands of cattle. Additionally, it identifies the current gaps in research within this field and suggests areas that require further investigation. Understanding the regulation and function of β-defensins offers valuable insights to develop effective strategies for strengthening the immune system of mammary glands, reducing the reliance on synthetic antimicrobials, and explore novel natural antimicrobial alternatives.
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Affiliation(s)
- Mojtaba Daneshi
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - Joel S. Caton
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - Luciano S. Caixeta
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN 55108, USA;
| | - Zohre Eftekhari
- Biotechnology Department, Pasteur Institute of Iran, Tehran 1316943551, Iran;
| | - Alison K. Ward
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada;
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Fang J, Jiang H, Liu E, Ge R, Li Q. Farrerol Inhibits Vascular Smooth Muscle Cell Proliferation and Protects Them From Oxidative Injury via Bidirectional Modulation of the PI3K/Akt/mTOR Signaling Pathway. Nat Prod Commun 2023. [DOI: 10.1177/1934578x221117414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The inhibition of intimal hyperplasia (IH) is an effective strategy to improve the long-term outcome of endovascular therapy and prevent restenosis. Farrerol, a naturally occurring dihydroflavone with a variety of bioactivities, exerts inhibitory effects against balloon injury-induced IH in rats. In the present study, bioinformatics analysis, in combination with in vitro experimental validation, was performed to elucidate the underlying inhibitory mechanisms. The protein–protein interaction (PPI) network was assessed to identify farrerol-related protein targets in the context of IH, based on which biological functions and pathway enrichment were analyzed. The proliferation and cell cycle distribution of vascular smooth muscle cells (VSMCs) were investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2 H-tetrazolium bromide and 5-ethynyl-2-deoxyuridine incorporation assays and flow cytometric analysis, respectively. The level of pro-inflammatory cytokines in the cell culture medium was estimated using an enzyme-linked immunosorbent assay (ELISA). Protein expression in A7r5 cells was determined by western blotting. Forty-six IH-related targets of farrerol were identified, and the PI3K/Akt/mTOR pathway was highly enriched among the 43 predicted pathways ( P < .05). In serum (10% fetal bovine serum)-induced A7r5 cells, farrerol inhibited proliferation through non-cytotoxic effects, induced cell cycle arrest in the G0/G1 phase , and suppressed the activation of the PI3K/Akt/mTOR pathway. In H2O2 (300 µM)-induced A7r5 cells, farrerol reduced the release of IL-1 β and TNF- α and reversed the suppressive effect on the PI3K/Akt/mTOR pathway in response to H2O2 stimulation. In conclusion, farrerol inhibits the proliferation of VSMCs and protects VSMCs from oxidative injury via the bidirectional modulation of the PI3K/Akt/mTOR signaling pathway, which might contribute to the suppression of neointima formation.
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Affiliation(s)
| | | | - Enli Liu
- Shanxi Medical University, Taiyuan, China
| | - Rui Ge
- Shanxi Medical University, Taiyuan, China
| | - Qingshan Li
- Shanxi Medical University, Taiyuan, China
- Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation, Shanxi University of Chinese Medicine, Taiyuan, China
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Qin X, Xu X, Hou X, Liang R, Chen L, Hao Y, Gao A, Du X, Zhao L, Shi Y, Li Q. The pharmacological properties and corresponding mechanisms of farrerol: a comprehensive review. PHARMACEUTICAL BIOLOGY 2022; 60:9-16. [PMID: 34846222 PMCID: PMC8635655 DOI: 10.1080/13880209.2021.2006723] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
CONTEXT Farrerol, a typical natural flavanone isolated from the traditional Chinese herb 'Man-shan-hong' [Rhododendron dauricum L. (Ericaceae)] with phlegm-reducing and cough-relieving properties, is widely used in China for treating bronchitis and asthma. OBJECTIVE To present the anti-inflammatory, antioxidant, vasoactive, antitumor, and antimicrobial effects of farrerol and its underlying molecular mechanisms. METHODS The literature was reviewed by searching PubMed, Medline, Web of Knowledge, Scopus, and Google Scholar databases between 2011 and May 2021. The following key words were used: 'farrerol,' 'flavanone,' 'anti-inflammatory,' 'antioxidant,' 'vasoactive,' 'antitumor,' 'antimicrobial,' and 'molecular mechanisms'. RESULTS Farrerol showed anti-inflammatory effects mainly mediated via the inhibition of interleukin (IL)-6/8, IL-1β, tumour necrosis factor(TNF)-α, NF-κB, NO, COX-2, JNK1/2, AKT, PI3K, ERK1/2, p38, Keap-1, and TGF-1β. Farrerol exhibited antioxidant effects by decreasing JNK, MDA, ROS, NOX4, Bax/Bcl-2, caspase-3, p-p38 MAPK, and GSK-3β levels and enhancing Nrf2, GSH, SOD, GSH-Px, HO-1, NQO1, and p-ERK levels. The vasoactive effects of farrerol were also shown by the reduced α-SMA, NAD(P)H, p-ERK, p-Akt, mTOR, Jak2, Stat3, Bcl-2, and p38 levels, but increased OPN, occludin, ZO-1, eNOS, CaM, IP3R, and PLC levels. The antitumor effects of farrerol were evident from the reduced Bcl-2, Slug, Zeb-1, and vimentin levels but increased p27, ERK1/2, p38, caspase-9, Bax, and E-cadherin levels. Farrerol reduced α-toxin levels and increased NO production and NF-κB activity to impart antibacterial activity. CONCLUSIONS This review article provides a theoretical basis for further studies on farrerol, with a view to develop and utilise farrerol for treating of vascular-related diseases in the future.
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Affiliation(s)
- Xiaojiang Qin
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
- CONTACT Xiaojiang Qin School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xinrong Xu
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaomin Hou
- Department of Pharmacology, Shanxi Medical University, Shanxi, China
| | - Ruifeng Liang
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Liangjing Chen
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yuxuan Hao
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Anqi Gao
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xufeng Du
- Department of Exercise Rehabilitation, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Liangyuan Zhao
- Department of Exercise Rehabilitation, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yiwei Shi
- Department of Respiratory and Critical Care Medicine, Shanxi Medical University Affiliated First Hospital, Taiyuan, Shanxi, China
| | - Qingshan Li
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Chronic Inflammatory Targeted Drugs, School of Materia Medica, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi, China
- Qingshan Li School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, China
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Zou W, Huang H, Wu H, Cao Y, Lu W, He Y. Preparation, Antibacterial Potential, and Antibacterial Components of Fermented Compound Chinese Medicine Feed Additives. Front Vet Sci 2022; 9:808846. [PMID: 35400112 PMCID: PMC8987234 DOI: 10.3389/fvets.2022.808846] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
This experiment was conducted to compare the antibacterial ability and to identify the antibacterial components of different fermented compound Chinese medicine feed additives in order to develop one fermented compound Chinese medicine feed additive product that can effectively alleviate metritis, vaginitis, and mastitis of sows. The Oxford cup method and double dilution method were used to compare the antibacterial ability of three fermented compound Chinese medicine feed additives (A, B, and C). UHPLC-QE-MS-based untargeted metabolomics was used to identify the antibacterial components of fermented compound Chinese medicine feed additives. Results showed that among fermented compound Chinese medicine feed additives A, B, and C, additive A had the strongest ability to inhibit the growth of Staphylococcus aureus, Salmonella cholerae suis, Escherichia coli, and Streptococcus agalactiae. The MIC and MBC of additive A were the lowest for Staphylococcus aureus compared to that for the other three pathogens. The concentrations of 23 Chinese medicine ingredients (ellagic acid, guanine, camphor, L-valine, sinapine, dipropylphthalate, 3-hydroxy-5-isopropylidene-3,8-dimethyl-2,3,3a,4,5,8a-hexahydro-6(1H)-azulenone, 7-dihydroxy-2-(4-hydroxyphenyl)-8-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]-6-(3,4,5-trihydroxyoxan-2-yl)chromen-4-one, acetylcholine, farrerol, pyrogallol, ethyl gallate, demethylwedelolactone, methyl gallate, kaempferide, gallic acid, eriodictyol, threonic acid, inositol, 3′,4′,7-trihydroxyflavanone, taxifolin, asiatic acid, and isorhamnetin) in additive A were significantly (p < 0.05 or p < 0.01) higher than those in additive B, respectively. It is concluded that the mixture composed of 23 active components in fermented compound Chinese medicine feed additive A plays an important role in inhibiting the growth of Staphylococcus aureus, Salmonella cholerae suis, Escherichia coli, and Streptococcus agalactiae.
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Affiliation(s)
- Wanjie Zou
- Jiangxi Province Key Laboratory of Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang, China
| | - Honglan Huang
- Forest Institution, Jiangxi Environmental Engineering Vocational College, Ganzhou, China
| | - Huadong Wu
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, China
| | - Yuandong Cao
- Department of Technology, Jiangxi Jiabo Bioengineering Co. Ltd., Jiujiang, China
| | - Wei Lu
- Jiangxi Province Key Laboratory of Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang, China
- *Correspondence: Wei Lu
| | - Yuyong He
- Jiangxi Province Key Laboratory of Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang, China
- Yuyong He
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Umar T, Ma X, Yin B, Umer S, Zahoor A, Akhtar M, Umar Z, Shaukat A, Deng G. miR-424-5p overexpression inhibits LPS-stimulated inflammatory response in bovine endometrial epithelial cells by targeting IRAK2. J Reprod Immunol 2021; 150:103471. [PMID: 35032930 DOI: 10.1016/j.jri.2021.103471] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 11/26/2022]
Abstract
Endometritis is inflammation of endometrium due to various factors and is a common cause of infertility. Several remedies used for endometritis like antibiotics, hormones, and herbs. Studies confirm that microRNAs play a significant role in various inflammatory diseases. However, the role of miR-424-5p in endometritis is not clear. In our study, histopathology, real-time quantitative polymerase chain reaction, Western blot analysis, immunofluorescence, ELISA, and dual-luciferase reporter assay were used to elucidate the effect of miR-424-5p in lipopolysaccharide (LPS)-primed inflammatory response in bovine endometrial epithelial cells (BEECs) and clarify the potential mechanism. Our results revealed that miR-424-5p mimics noticeably decrease the production of proinflammatory cytokines (IL-1β, IL-6, and TNF-α), while miR-424-5p inhibitors have inverse effects in BEECs. Moreover, overexpression of miR-424-5p on BEECs cells also suppressed NF-κB p65 activation. Afterwards, we verified that miR-424-5p inhibited Interleukin 1 Receptor Associated Kinase 2 (IRAK2) expression by binding to the 3'-UTR of IRAK2 mRNA. Further, co-transfection of miR-424-5p inhibitors and siRNA-IRAK2 revealed that negative regulation of miR-424-5p on LPS-induced inflammatory response in BEECs was mediated by IRAK2.Mutually, miR-424-5p pharmacologic stabilization represents an entirely unique medical aid for cow endometritis and other inflammation-related diseases.
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Affiliation(s)
- Talha Umar
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xiaofei Ma
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Baoyi Yin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Saqib Umer
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, PR China; Department of Theriogenology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, 38000 Punjab, Pakistan
| | - Arshad Zahoor
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Muhammad Akhtar
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Zaima Umar
- Department of Anatomy and Histology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, 38000 Punjab, Pakistan
| | - Aftab Shaukat
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.
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Liu B, Li Q, Gong Z, Zhao J, Gu B, Feng S. Staphylococcus aureus lipoproteins play crucial roles in inducing inflammatory responses and bacterial internalization into bovine mammary epithelial cells. Microb Pathog 2021; 162:105364. [PMID: 34921958 DOI: 10.1016/j.micpath.2021.105364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/11/2021] [Accepted: 12/14/2021] [Indexed: 01/10/2023]
Abstract
Bovine mastitis is caused by bacterial infection and characterized by inflammatory and infectious processes. Staphylococcus aureus frequently causes subclinical mastitis in dairy cows. In this study, we aimed to investigate the roles of S. aureus lipoproteins in inducing inflammatory responses and in mediating bacterial internalization into bovine mammary epithelial cells (bMECs). The results showed that TLR2 expression in bMECs infected with S. aureus isogenic mutant deficient in lipoprotein maturation was decreased compared to that in bMECs infected with wild-type S. aureus. Lipoproteins from S. aureus and the engagement of TLR2 were essential for inducing the activation of MAPK and NF-κB signaling, and stimulating the secretion of the inflammatory mediators tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and C-X-C motif chemokine ligand 8 (CXCL8). The production of prostaglandin E2 (PGE2) and the expression of PTGS2 in S. aureus-infected bMECs were dependent on the presence of bacterial lipoproteins. Furthermore, bacterial lipoproteins contributed to S. aureus internalization into bMECs. These findings suggest the S. aureus lipoproteins are key immunobiologically active compounds that trigger inflammatory responses in bMECs and play an important role in S. aureus internalization into bMECs.
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Affiliation(s)
- Bo Liu
- Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China
| | - Qianru Li
- Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China
| | - Zhiguo Gong
- Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China
| | - Jiamin Zhao
- Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China
| | - Baichen Gu
- Laboratory of Veterinary Clinical Pharmacology, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China
| | - Shuang Feng
- Laboratory of Veterinary Public Health, College of Veterinary Medicine, Inner Mongolia Agricultural University, No. 306, Zhaowuda Road, Saihan District, 010018, Hohhot, China.
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9
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Tian Z, Zhang H, Shang C. Farrerol ameliorate adjuvant-induced ankle injury via alteration of PPAR-γ signal pathway. J Food Biochem 2021; 45:e13585. [PMID: 33844304 DOI: 10.1111/jfbc.13585] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/31/2020] [Accepted: 11/01/2020] [Indexed: 12/15/2022]
Abstract
This study evaluated the anti-inflammatory activity against lipopolysaccharide (LPS)-mediated mouse macrophages (in vitro) and assessed the protective effect of farrerol on arthritis caused by complete freund adjuvant (CFA) in rats. For the evaluation of the pharmacological effect of farrerol on the activity of nitric oxide (NO) and cyclooxygenase, pro-inflammatory cytokines including interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and interleukin-1β, RAW 264.7 cells were used. A 0.1 ml CFA was injected subcutaneously for the induction of arthritis. The paw volume, body weight and arthritic score were estimated at regular intervals. Pro-inflammatory cytokines, inflammatory mediators, and antioxidant parameters were also estimated. Farrerol suppressed NO production and COX-catalyzed prostaglandin (PGE2 ) in RAW 264.7. Farrerol also downregulated the p-p65, p-IκBα expression and upregulated the PPAR-γ expression in RAW 264.7 cells. Treatment of farrerol increased body weight substantially, and reduced paw edema and arthritic score. Farrerol treatment also significantly improved the level of hemoglobin (Hb), count of red blood cells (RBC), and decreased the rate of erythrocyte sedimentation (ESR), white blood cell (WBC) parameters, while the generation of pro-inflammatory cytokines inhibited. Together, farrerol also suppressed the pro-inflammatory cytokines TNF-α, IL-6, and IL-1β. Obtained results directed that the farrerol exerted its therapeutic effect against CFA-induced arthritic rats through anti-inflammatory mechanism by regulation of the PPAR-γ. PRACTICAL APPLICATIONS: Increase the arthritis disease worldwide day-by-day. The current research study showed the anti-arthritic effect of farrerol (flavonoid phytoconstituent) of Rhododendron dauricum Linn. In this study, farrerol considerably inhibited the NF-κB to show the anti-arthritic effect. The finding showed the potential effect against acute and chronic inflammation via inhibition of inflammatory mediators and oxidative stress. The result suggests the anti-inflammatory and antioxidant effect of farrerol. On the basis of result, we can say that farrerol can be the beneficial drug to treat the arthritis.
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Affiliation(s)
- Zhao Tian
- Department of Hand Surgery, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, 710054, China
| | - Hongxing Zhang
- Department of Hand Surgery, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, 710054, China
| | - Chi Shang
- Department of Hand Surgery, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, 710054, China
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10
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Feng W, Liu J, Huang L, Tan Y, Peng C. Gut microbiota as a target to limit toxic effects of traditional Chinese medicine: Implications for therapy. Biomed Pharmacother 2020; 133:111047. [PMID: 33378954 DOI: 10.1016/j.biopha.2020.111047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/11/2020] [Accepted: 11/19/2020] [Indexed: 12/17/2022] Open
Abstract
Traditional Chinese medicines (TCMs) are medicines that are widely used in oriental countries under the guidance of ancient Chinese medicinal philosophies. With thousands of years of experiences in fighting against diseases, TCMs are gaining increasing importance in the world. Although the efficacy of TCMs is well recognized in clinic, the toxicity of TCMs has become a serious issue around the world in recent years. In general, the toxicity of TCMs is caused by the toxic medicinal compounds and contaminants in TCMs such as pesticides, herbicides, and heavy metals. Recent studies have demonstrated that gut microbiota can interact with TCMs and thus influence the toxicity of TCMs. However, there is no focused review on gut microbiota and the toxicity of TCMs. Here, we summarized the influences of the gut microbiota on the toxicity of medicinal compounds in TCMs and the corresponding mechanisms were offered. Then, we discussed the relationships between gut microbiota and the TCM contaminants. In addition, we discussed the methods of manipulating gut microbiota to reduce the toxicity of TCMs. At the end of this review, the perspectives on gut microbiota and the toxicity of TCMs were also discussed.
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Affiliation(s)
- Wuwen Feng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Juan Liu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lihua Huang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuzhu Tan
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
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11
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Farrerol Directly Targets GSK-3 β to Activate Nrf2-ARE Pathway and Protect EA.hy926 Cells against Oxidative Stress-Induced Injuries. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:5967434. [PMID: 32082480 PMCID: PMC7007950 DOI: 10.1155/2020/5967434] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 12/17/2019] [Accepted: 01/03/2020] [Indexed: 12/11/2022]
Abstract
Oxidative stress-mediated endothelial injury is considered to be involved in the pathogenesis of various cardiovascular diseases. Farrerol, a typical natural flavanone from the medicinal plant Rhododendron dauricum L., has been reported to show protective effects against oxidative stress-induced endothelial injuries in our previous study. However, its action molecular mechanisms and targets are still unclear. In the present study, we determined whether farrerol can interact with glycogen synthase kinase 3β- (GSK-3β-) nuclear factor erythroid 2-related factor 2- (Nrf2-) antioxidant response element (ARE) signaling, which is critical in defense against oxidative stress. Our results demonstrated that farrerol could specifically target Nrf2 negative regulator GSK-3β and inhibit its kinase activity. Mechanistic studies proved that farrerol could induce an inhibitory phosphorylation of GSK-3β at Ser9 without affecting the expression level of total GSK-3β protein and promote the nuclear translocation of Nrf2 as well as the mRNA and protein expression of its downstream target genes heme oxygenase-1 (HO-1) and NAD(P)H: quinone oxidoreductase 1 (NQO1) in EA.hy926 cells. Further studies performed with GSK-3β siRNA and specific inhibitor lithium chloride (LiCl) confirmed that GSK-3β inhibition was involved in farrerol-mediated endothelial protection and Nrf2 signaling activation. Moreover, molecular docking and molecular dynamics studies revealed that farrerol could bind to the ATP pocket of GSK-3β, which is consistent with the ATP-competitive kinetic behavior. Collectively, our results firstly demonstrate that farrerol could attenuate endothelial oxidative stress by specifically targeting GSK-3β and further activating the Nrf2-ARE signaling pathway.
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Li Y, Zeng Y, Meng T, Gao X, Huang B, He D, Ran X, Du J, Zhang Y, Fu S, Hu G. Farrerol protects dopaminergic neurons in a rat model of lipopolysaccharide-induced Parkinson's disease by suppressing the activation of the AKT and NF-κB signaling pathways. Int Immunopharmacol 2019; 75:105739. [PMID: 31351366 DOI: 10.1016/j.intimp.2019.105739] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/30/2019] [Accepted: 07/02/2019] [Indexed: 12/26/2022]
Abstract
Neuroinflammation, characterized by the activation of microglia, is one of the major pathologic processes of Parkinson's disease (PD). Overactivated microglia can release many pro-inflammatory cytokines, which cause an excessive inflammatory response and eventually damage dopaminergic neurons. Therefore, the inhibition of neuroinflammation that results from the overactivation of microglia may be an method for the treatment of PD. Farrerol is a 2,3-dihydro-flavonoid obtained from Rhododendron, and it possesses various biological functions, including anti-inflammatory, antibacterial and antioxidant activities. However, the effect of farrerol on neuroinflammation has not been investigated. The present study uncovered a neuroprotective role for farrerol. In vitro, farrerol markedly decreased the production of inflammatory mediators, including interleukin-6 (IL-6), interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), cyclooxygenase 2 (COX-2) and induced nitric oxide synthase (iNOS), induced by lipopolysaccharide (LPS) in BV-2 cells. This anti-inflammatory effect was regulated via inhibiting NF-κB p65 and AKT phosphorylation. Furthermore, we found that farrerol alleviated microglial activation and dopaminergic neuronal death in rats with LPS-induced PD. Pretreatment with farrerol markedly improved motor deficits in rats with LPS-induced PD. Taken together, our results indicate that the neuroprotective effect of the farrerol, which prevents microglial overactivation in rats with LPS-induced PD, may provide a potential therapy for patients suffering from PD.
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Affiliation(s)
- Yuhang Li
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Yalong Zeng
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Tianyu Meng
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Xiyu Gao
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Bingxu Huang
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Dewei He
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Xin Ran
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Jian Du
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Yufei Zhang
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Shoupeng Fu
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Guiqiu Hu
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, China.
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13
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Ma X, Lin H, He Y, She Y, Wang M, Abd El-Aty AM, Afifi NA, Han J, Zhou X, Wang J, Zhang J. Magnetic molecularly imprinted polymers doped with graphene oxide for the selective recognition and extraction of four flavonoids from Rhododendron species. J Chromatogr A 2019; 1598:39-48. [PMID: 30940357 DOI: 10.1016/j.chroma.2019.03.053] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 03/12/2019] [Accepted: 03/23/2019] [Indexed: 01/16/2023]
Abstract
Herein, a novel magnetic molecularly imprinted polymer doped with reticular graphene oxide (Fe3O4@SiO2-GO@MIPs) was synthesized for the selective recognition and extraction of 4 flavonoids (farrerol, taxifolin, kaempferol, and hyperin) from Rhododendrons species. The Fe3O4@SiO2-GO@MIPs with lamellar membranes showed outstanding adsorption capacity. The 3D cavities complementary to the "shape" of farrerol were "imprinted" on the polymer framework after removal of farrerol template. Competitive binding assays showed that the polymer has a higher selectivity for farrerol compared with other analogues and references. The Fe3O4@SiO2-GO@MIPs as solid-phase extraction adsorbents combined with liquid chromatography-tandem quadrupole mass spectrometry (LC-MS/MS) was used for selective determination of four flavonoids from Rhododendrons samples. The limits of detection (LOD) were 0.07, 0.08, 0.06, and 0.08 μg L-1 for farrerol, taxifolin, kaempferol, and hyperin, respectively. These results suggest that the prepared Fe3O4@SiO2-GO@MIPs have the potential applicability to extract, purify, and enrich flavonoids from herbs, supplements, and other natural products.
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Affiliation(s)
- Xingbin Ma
- Institute of Quality Standards and Testing Technology for Agri-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Zhanjiang Experimental Station of Chinese Academy of Tropical Sciences, Zhanjiang 524013, China; Institute of Veterinary and Animal Husbandry, Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850006, China; Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Sciences, Lanzhou 730050, Gansu, China
| | - Hongling Lin
- Zhanjiang Experimental Station of Chinese Academy of Tropical Sciences, Zhanjiang 524013, China
| | - Yahui He
- Institute of Quality Standards and Testing Technology for Agri-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yongxin She
- Institute of Quality Standards and Testing Technology for Agri-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Miao Wang
- Institute of Quality Standards and Testing Technology for Agri-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - A M Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt; Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240 Erzurum, Turkey
| | - Nehal A Afifi
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt
| | - Jianchen Han
- Zhanjiang Experimental Station of Chinese Academy of Tropical Sciences, Zhanjiang 524013, China
| | - Xuzheng Zhou
- Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Sciences, Lanzhou 730050, Gansu, China
| | - Jing Wang
- Institute of Quality Standards and Testing Technology for Agri-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiyu Zhang
- Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Sciences, Lanzhou 730050, Gansu, China.
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Gut microbiota, a new frontier to understand traditional Chinese medicines. Pharmacol Res 2019; 142:176-191. [PMID: 30818043 DOI: 10.1016/j.phrs.2019.02.024] [Citation(s) in RCA: 227] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/18/2019] [Accepted: 02/23/2019] [Indexed: 02/06/2023]
Abstract
As an important component of complementary and alternative medicines, traditional Chinese medicines (TCM) are gaining more and more attentions around the world because of the powerful therapeutic effects and less side effects. However, there are still some doubts about TCM because of the questionable TCM theories and unclear biological active compounds. In recent years, gut microbiota has emerged as an important frontier to understand the development and progress of diseases. Together with this trend, an increasing number of studies have indicated that drug molecules can interact with gut microbiota after oral administration. In this context, more and more studies pertaining to TCM have paid attention to gut microbiota and have yield rich information for understanding TCM. After oral administration, TCM can interact with gut microbiota: (1) TCM can modulate the composition of gut microbiota; (2) TCM can modulate the metabolism of gut microbiota; (3) gut microbiota can transform TCM compounds. During the interactions, two types of metabolites can be produced: gut microbiota metabolites (of food and host origin) and gut microbiota transformed TCM compounds. In this review, we summarized the interactions between TCM and gut microbiota, and the pharmacological effects and features of metabolites produced during interactions between TCM and gut microbiota. Then, focusing on gut microbiota and metabolites, we summarized the aspects in which gut microbiota has facilitated our understanding of TCM. At the end of this review, the outlooks for further research of TCM and gut microbiota were also discussed.
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Cui B, Zhang S, Wang Y, Guo Y. Farrerol attenuates β-amyloid-induced oxidative stress and inflammation through Nrf2/Keap1 pathway in a microglia cell line. Biomed Pharmacother 2019; 109:112-119. [DOI: 10.1016/j.biopha.2018.10.053] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 10/10/2018] [Accepted: 10/10/2018] [Indexed: 12/19/2022] Open
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Wei Z, Su K, Jiang P, Shi M, Wang J, Xie G. Geniposide reduces Staphylococcus aureus internalization into bovine mammary epithelial cells by inhibiting NF-κB activation. Microb Pathog 2018; 125:443-447. [DOI: 10.1016/j.micpath.2018.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 09/30/2018] [Accepted: 10/01/2018] [Indexed: 12/31/2022]
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17
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A two-step immunomagnetic separation of somatic cell subpopulations for a gene expression profile study in bovine milk. J DAIRY RES 2018; 85:281-287. [PMID: 30088456 DOI: 10.1017/s002202991800050x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The objective of this study was to demonstrate the usefulness of an immunomagnetic method to purify subpopulations of milk somatic cells. The experiment was conducted on milk samples collected from healthy cows (n = 17) and from cows with clinical mastitis (n = 24) due to a Staphylococcus aureus natural infection. A two-step immunomagnetic purification was applied to simultaneously separate three somatic cell subpopulations from the same milk sample. Total RNA was extracted and qPCR was performed to determinate mRNA levels of innate immunity target genes in purified somatic cell subpopulations. Good quality and quantity of RNA allowed the reference gene analysis in each cell subpopulation. An up-regulation of the main genes involved in innate immune defence was detected in separated polymorphonuclear neutrophilic leucocytes-monocytes and lymphocytes of mastitic milk. These results and flow cytometric analysis suggest that the immunomagnetic purification is an efficient method for the isolation of the three populations from milk, allowing the cells to be studied separately.
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Zhang L, Hou X, Sun L, He T, Wei R, Pang M, Wang R. Staphylococcus aureus Bacteriophage Suppresses LPS-Induced Inflammation in MAC-T Bovine Mammary Epithelial Cells. Front Microbiol 2018; 9:1614. [PMID: 30083140 PMCID: PMC6064726 DOI: 10.3389/fmicb.2018.01614] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 06/28/2018] [Indexed: 01/08/2023] Open
Abstract
Several previous studies have shown that bacteriophages can significantly affect the production of various cytokines. The aim of this present study was to investigate the inflammatory effects and mechanisms of bacteriophage vB_SauM_JS25 in stimulated MAC-T bovine mammary epithelial cells by real-time polymerase chain reaction (PCR) and Western blotting. Experiments show that vB_SauM_JS25 reduces Staphylococcus aureus- or lipopolysaccharide (LPS)-induced levels of tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, IL-8, IL-10, and regulated on activation, normal T cell expressed and secreted (RANTES) mRNA in MAC-T cells, in a manner expected to be unrelated to its antibacterial action. Moreover, S. aureus bacteriophage vB_SauM_JS25 suppressed the LPS-induced phosphorylation of nuclear factor (NF)-κB p65, which may represent an important mechanism mediating these effects. A carefully regulated balance between activation and inhibition by bacteriophages must be kept avoiding inappropriate inflammatory responses. The ability of vB_SauM_JS25 to influence the immune response highlights the potential development and application of bacteriophage-based therapies and may represent a novel anti-inflammatory therapeutic strategy.
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Affiliation(s)
- Lili Zhang
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Xiang Hou
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Lichang Sun
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Tao He
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Ruicheng Wei
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Maoda Pang
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Ran Wang
- Key Laboratory of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
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Farrerol Ameliorates TNBS-Induced Colonic Inflammation by Inhibiting ERK1/2, JNK1/2, and NF-κB Signaling Pathway. Int J Mol Sci 2018; 19:ijms19072037. [PMID: 30011811 PMCID: PMC6073308 DOI: 10.3390/ijms19072037] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 07/09/2018] [Accepted: 07/09/2018] [Indexed: 12/23/2022] Open
Abstract
Farrerol, a type of 2, 3-dihydro-flavonoid, is obtained from Rhododendron. Previous studies have shown that Farrerol performs multiple biological activities, such as anti-inflammatory, antibacterial, and antioxidant activity. In this study, we aim to investigate the effect of Farrerol on colonic inflammation and explore its potential mechanisms. We found that the effect of Farrerol was evaluated via the 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced colitis model in mice and found that Farrerol has a protective effect on TNBS-induced colitis. Farrerol administration significantly improved the weight change, clinical scores, colon length, and intestinal epithelium barrier damage and markedly decreased the inflammatory cytokines production in TNBS-induced mice. The protective effect of Farrerol was also observed in LPS-induced RAW264.7 cells. We found that Farrerol observably reduced the production of inflammatory mediators including IL-1β, IL-6, TNF-α, COX-2, and iNOS in LPS-induced RAW264.7 cells via suppressing AKT, ERK1/2, JNK1/2, and NF-κB p65 phosphorylation. In conclusion, the study found that Farrerol has a beneficial effect on TNBS-induced colitis and might be a natural therapeutic agent for IBD treatment.
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20
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Zhao L, Tan S, Zhang H, Liu P, Tan YZ, Li JC, Jia D, Shen XF. Astragalus polysaccharides exerts anti-infective activity by inducing human cathelicidin antimicrobial peptide LL-37 in respiratory epithelial cells. Phytother Res 2018; 32:1521-1529. [PMID: 29672953 DOI: 10.1002/ptr.6080] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 02/05/2018] [Accepted: 03/06/2018] [Indexed: 12/30/2022]
Abstract
Astragalus polysaccharides (APS), one of the major active components in Astragalus membranaceus, is an effective immunomodulator used in the treatment of immunological diseases in China. However, the anti-infective action and mechanism of APS is not fully known. In the present study, we found that APS induced the expression of human cathelicidin antimicrobial peptide LL-37, a key host anti-infective molecule, in both mRNA and protein levels in respiratory epithelial cells HBE16 and A549. Furthermore, the lysate and supernatant from APS-treated HBE16 cells both exhibited an obvious antibacterial action, which was partially neutralizated by LL-37 monoclonal antibody. In addition, APS also significantly elevated the phosphorylation of p38 MAPK and JNK and caused the degradation of IκBα. Specific inhibitors of p38 MAPK, JNK, or NF-κB obviously abolished APS-induced LL-37 synthesis and antibacterial activity, respectively. Taken together, our results confirmed the enhancement of APS on LL-37 induction and antibacterial action in respiratory epithelial cells, which may be attributed to activation of p38 MAPK/JNK and NF-κB pathways. Furthermore, these results also supported the clinical application of APS in the treatment of infectious diseases.
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Affiliation(s)
- Lin Zhao
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Ministry of Education), West China Second University Hospital, Sichuan University, Chengdu, China
| | - Shuai Tan
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Ministry of Education), West China Second University Hospital, Sichuan University, Chengdu, China
| | - Hai Zhang
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Peng Liu
- Shaanxi TASLY Plant Pharmaceutical Co Ltd., Shangluo, Shaanxi, China
| | - Yu-Zhu Tan
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jia-Chuan Li
- School of Pharmacy, Southwest Minzu University, Chengdu, China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Ministry of Education), West China Second University Hospital, Sichuan University, Chengdu, China
| | - Xiao-Fei Shen
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Ministry of Education), West China Second University Hospital, Sichuan University, Chengdu, China
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21
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Nair JJ, Wilhelm A, Bonnet SL, van Staden J. Antibacterial constituents of the plant family Amaryllidaceae. Bioorg Med Chem Lett 2017; 27:4943-4951. [DOI: 10.1016/j.bmcl.2017.09.052] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/22/2017] [Accepted: 09/26/2017] [Indexed: 02/06/2023]
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22
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Chen Y, Huang J, Tang C, Chen X, Yin Z, Heng BC, Chen W, Shen W. Small molecule therapeutics for inflammation-associated chronic musculoskeletal degenerative diseases: Past, present and future. Exp Cell Res 2017; 359:1-9. [PMID: 28739444 DOI: 10.1016/j.yexcr.2017.07.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/19/2017] [Accepted: 07/21/2017] [Indexed: 12/13/2022]
Abstract
Inflammation-associated chronic musculoskeletal degenerative diseases (ICMDDs) like osteoarthritis and tendinopathy often results in morbidity and disability, with consequent heavy socio-economic burden. Current available therapies such as NSAIDs and glucocorticoid are palliative rather than disease-modifying. Insufficient systematic research data on disease molecular mechanism also makes it difficult to exploit valid therapeutic targets. Small molecules are designed to act on specific signaling pathways and/or mechanisms of cellular physiology and function, and have gradually shown potential for treating ICMDDs. In this review, we would examine and analyze recent developments in small molecule drugs for ICMDDs, suggest possible feasible improvements in treatment modalities, and discuss future research directions.
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Affiliation(s)
- Yangwu Chen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Orthopaedics Research Institute of Zhejiang Univerisity, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China; China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Jiayun Huang
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Orthopaedics Research Institute of Zhejiang Univerisity, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China; China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Chenqi Tang
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Orthopaedics Research Institute of Zhejiang Univerisity, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China; China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Xiao Chen
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China; China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Zi Yin
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China
| | - Boon Chin Heng
- Faculty of Dentistry, Department of Endodontology, The University of Hong Kong, Pokfulam, Hong Kong
| | - Weishan Chen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, China; Orthopaedics Research Institute of Zhejiang Univerisity, China.
| | - Weiliang Shen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang 310000, China; Orthopaedics Research Institute of Zhejiang Univerisity, China; Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang 310000, China; China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China.
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Abstract
This review addresses an important public health hazard affecting food safety. Antimicrobial agents are used in foods to reduce or eliminate microorganisms that cause disease. Many traditional organic compounds, novel synthetic organic agents, natural products, peptides, and proteins have been extensively studied for their effectiveness as antimicrobial agents against foodborne Campylobacter spp., Escherichia coli, Listeria spp. and Salmonella. However, antimicrobial resistance can develop in microorganisms, enhancing their ability to withstand the inhibiting or killing action of antimicrobial agents. Knowledge gaps still exist with regard to the actual chemical and microbiological mechanisms that must be identified to facilitate the search for new antimicrobial agents. Technical implementation of antimicrobial active packing films and coatings against target microorganisms must also be improved for extended product shelf life. Recent advances in antimicrobial susceptibility testing can provide researchers with new momentum to pursue their quest for a resistance panacea.
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Affiliation(s)
- Edward P C Lai
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6.
| | - Zafar Iqbal
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Tyler J Avis
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
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Farrerol inhibits IL-6 and IL-8 production in LPS-stimulated human gingival fibroblasts by suppressing PI3K/AKT/NF-κB signaling pathway. Arch Oral Biol 2016; 62:28-32. [DOI: 10.1016/j.archoralbio.2015.11.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 11/04/2015] [Accepted: 11/08/2015] [Indexed: 12/13/2022]
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Lv X, Fu K, Li W, Wang Y, Wang J, Li H, Tian W, Cao R. TIIA attenuates LPS-induced mouse endometritis by suppressing the NF-κB signaling pathway. Can J Physiol Pharmacol 2015; 93:967-71. [DOI: 10.1139/cjpp-2015-0003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Endometritis is one of the main diseases that harms the dairy cow industry. Tanshinone IIA (TIIA), a fat-soluble alkaloid isolated from Salviae miltiorrhizae, has been reported to have potent anti-inflammatory properties. However, the anti-inflammatory effects of TIIA on a mouse model of lipopolysaccharide (LPS)-induced endometritis remain to be elucidated. The purpose of the present study was to investigate the effects of TIIA on LPS-induced mouse endometritis. TIIA was intraperitoneally injected 1 h before and 12 h after perfusion of LPS into the uterus. A histological examination was then performed, and the concentrations of myeloperoxidase (MPO) and nitric oxide (NO) in the uterine tissue were determined. The levels of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in a homogenate of the uterus were detected by enzyme-linked immunosorbent assay. The extent of phosphorylation of IκBα and p65 was detected by Western blotting. TIIA markedly reduced the infiltration of neutrophils, suppressed MPO activity and the concentration of NO, and attenuated the expression of TNF-α and IL-1β. Furthermore, TIIA inhibited the phosphorylation of the nuclear factor-kappa B (NF-κB) p65 subunit and the degradation of its inhibitor IκBα. All the results suggest that TIIA has strong anti-inflammatory effects on LPS-induced mouse endometritis.
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Affiliation(s)
- Xiaopei Lv
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Kaiqiang Fu
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Weishi Li
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Yu Wang
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Jifang Wang
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Huatao Li
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Wenru Tian
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Rongfeng Cao
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
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Zhang H, Yan J, Zhuang Y, Han G. Anti-inflammatory effects of farrerol on IL-1β-stimulated human osteoarthritis chondrocytes. Eur J Pharmacol 2015; 764:443-447. [DOI: 10.1016/j.ejphar.2015.07.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/03/2015] [Accepted: 07/06/2015] [Indexed: 12/20/2022]
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Identification and characterization of three new flavonoids from Rhododendron dauricum. Chin J Nat Med 2015; 13:628-33. [DOI: 10.1016/s1875-5364(15)30059-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Indexed: 11/20/2022]
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Kościuczuk EM, Lisowski P, Jarczak J, Krzyżewski J, Zwierzchowski L, Bagnicka E. Expression patterns of β-defensin and cathelicidin genes in parenchyma of bovine mammary gland infected with coagulase-positive or coagulase-negative Staphylococci. BMC Vet Res 2014; 10:246. [PMID: 25286984 PMCID: PMC4194403 DOI: 10.1186/s12917-014-0246-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 09/29/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Mastitis is still considered to be the most economically important infectious disease in dairy cattle breeding. The immune response in mammary gland tissues could help in developing support strategies to combat this disease. The role of neutrophils and macrophages in the innate response of mammary gland is well known. However, the immune response in mammary gland tissues, including levels of antimicrobial peptide transcripts, has not been well recognized. Moreover, most studies are conducted in vitro, on cell cultures, or on artificially infected animals, with analysis being done within a several dozen hours after infection.The aim of the study was to examine the in vivo transcript levels of beta-defensin and cathelicidins genes in cow mammary gland secretory tissue (parenchyma) with the chronic, recurrent and incurable mammary gland inflammation induced by coagulase-positive or coagulase-negative Staphyloccoci vs. bacteria-free tissue. RESULTS The mRNA of DEFB1, BNBD4, BNBD5, BNBD10 and LAP genes, but not of TAP gene, were detected in all investigated samples regardless of the animals' age and microbiological status of the mammary gland, but at different levels. The expression of most of the beta-defensin genes was shown to be much higher in tissues derived from udders infected with bacteria (CoPS or CoNS) than from bacteria-free udders, regardless of parity. Cathelicidins (CATH4, CATH5 and CATH6) showed expression patterns contrasting those of β-defensins, with the highest expression in tissues derived from bacteria-free udders. CONCLUSION Increased expression of genes encoding β-defensins in the infected udder confirms their crucial role in the defense of the cow mammary gland against mastitis. On the other hand, the elevated cathelicidin transcripts in non-infected tissues indicate their role in the maintenance of healthy mammary tissues. The expression levels of investigated genes are likely to depend on the duration of the infection and type of bacteria.
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Affiliation(s)
| | | | | | | | | | - Emilia Bagnicka
- Institute of Genetics and Animal Breeding, PAS in Jastrzębiec, ulPostępu 36A, Magdalenka 05-552, Poland.
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Wei Z, Fu Y, Zhou E, Tian Y, Yao M, Li Y, Yang Z, Cao Y. Effects of niacin on Staphylococcus aureus internalization into bovine mammary epithelial cells by modulating NF-κB activation. Microb Pathog 2014; 71-72:62-7. [DOI: 10.1016/j.micpath.2014.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/15/2014] [Accepted: 03/20/2014] [Indexed: 11/16/2022]
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Thymol inhibits Staphylococcus aureus internalization into bovine mammary epithelial cells by inhibiting NF-κB activation. Microb Pathog 2014; 71-72:15-9. [PMID: 24583152 DOI: 10.1016/j.micpath.2014.01.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/24/2014] [Accepted: 01/27/2014] [Indexed: 11/23/2022]
Abstract
Bovine mastitis is one of the most costly and prevalent diseases in the dairy industry and is characterised by inflammatory and infectious processes. Staphylococcus aureus (S. aureus), a Gram-positive organism, is a frequent cause of subclinical, chronic mastitis. Thymol, a monocyclic monoterpene compound isolated from Thymus vulgaris, has been reported to have antibacterial properties. However, the effect of thymol on S. aureus internalization into bovine mammary epithelial cells (bMEC) has not been investigated. In this study, we evaluated the effect of thymol on S. aureus internalization into bMEC, the expression of tracheal antimicrobial peptide (TAP) and β-defensin (BNBD5), and the inhibition of NF-κB activation in bMEC infected with S. aureus. Our results showed that thymol (16-64 μg/ml) could reduce the internalization of S. aureus into bMEC and down-regulate the mRNA expression of TAP and BNBD5 in bMEC infected with S. aureus. In addition, thymol was found to inhibit S. aureus-induced nitric oxide (NO) production in bMEC and suppress S. aureus-induced NF-κB activation in a dose-dependent manner. In conclusion, these results indicated that thymol inhibits S. aureus internalization into bMEC by inhibiting NF-κB activation.
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