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GOTO S, MIKAMI O, NAGASAWA Y, WATANABE A. Bovine neutrophils stimulated with Streptococcus uberis induce neutrophil extracellular traps, and cause cytotoxicity and transcriptional upregulation of inflammatory cytokine genes in bovine mammary epithelial cells. J Vet Med Sci 2024; 86:141-149. [PMID: 38104974 PMCID: PMC10898994 DOI: 10.1292/jvms.23-0302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/29/2023] [Indexed: 12/19/2023] Open
Abstract
This study aimed to understand the response of neutrophils stimulated by Streptococcus uberis, a major cause of mastitis. It was found that the production of neutrophil extracellular traps (NETs) was induced in milk clots from mastitic milk produced by S. uberis-infected bovine udders. The release of NETs from neutrophils stimulated by S. uberis was investigated. Bovine neutrophils cocultured with S. uberis in vitro released the components of NETs, which contained extracellular DNA and elastase. Bovine mammary epithelial cells (BMECs) incubated in coculture supernatants containing components of NETs, caused cytotoxicity and transcriptional upregulation of inflammatory cytokines, including of interleukin (IL) -1β, tumor necrosis factor (TNF)-α, IL-6, and IL-8, in BMECs. These findings suggest that bovine neutrophils stimulated by S. uberis induce responses that cause exacerbated inflammation, such as NET formation, cytotoxicity against BMECs, and increased production of inflammatory cytokines. Bovine neutrophil responses stimulated by S. uberis could be involved in the progression of S. uberis-induced mastitis.
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Affiliation(s)
- Shinya GOTO
- Pathology and Production Disease Group, Division of Hygiene
Management, National Institute of Animal Health, National Agriculture and Food Research
Organization, Hokkaido, Japan
| | - Osamu MIKAMI
- Pathology and Production Disease Group, Division of Hygiene
Management, National Institute of Animal Health, National Agriculture and Food Research
Organization, Hokkaido, Japan
| | - Yuya NAGASAWA
- Pathology and Production Disease Group, Division of Hygiene
Management, National Institute of Animal Health, National Agriculture and Food Research
Organization, Hokkaido, Japan
| | - Atsushi WATANABE
- Pathology and Production Disease Group, Division of Hygiene
Management, National Institute of Animal Health, National Agriculture and Food Research
Organization, Hokkaido, Japan
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Li M, Wang Z, Fu S, Sun N, Li W, Xu Y, Han X, Zhang J, Miao J. Taurine reduction of injury from neutrophil infiltration ameliorates Streptococcus uberis-induced mastitis. Int Immunopharmacol 2023; 124:111028. [PMID: 37857121 DOI: 10.1016/j.intimp.2023.111028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/14/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023]
Abstract
Mastitis is a common disease of dairy cows characterized by infiltration of leukocytes, especially neutrophils, resulting in increased permeability of the blood-milk barrier (BMB). Taurine, a functional nutrient, has been shown to have anti-inflammatory and antioxidant effects. Here, we investigated the regulatory effects and mechanisms of taurine on the complex immune network of the mammary gland in Streptococcus uberis (S. uberis) infection. We found that taurine had no direct effect on CXCL2-mediated neutrophil chemotaxis. However, it inhibited MAPK and NF-κB signalings by modulating the activity of TAK1 downstream of TLR2, thereby reducing CXCL2 expression in macrophages to reduce neutrophil recruitment in S. uberis infection. Further, the AMPK/Nrf2 signaling pathway was activated by taurine to help mitigate oxidative damage, apoptosis and disruption of tight junctions in mammary epithelial cells caused by hypochlorous acid, a strong oxidant produced by neutrophils, thus protecting the integrity of the mammary epithelial barrier. Taurine protects the BMB from damage caused by neutrophils via blocking the macrophage-CXCL2-neutrophil signaling axis and increasing the antioxidant capacity of mammary epithelial cells.
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Affiliation(s)
- Ming Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China
| | - Zhenglei Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Shaodong Fu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Naiyan Sun
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Weizhen Li
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China
| | - Yuanyuan Xu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiangan Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Jinqiu Zhang
- National Research Center for Veterinary Vaccine Engineering and Technology of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
| | - Jinfeng Miao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
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Ommati MM, Mobasheri A, Ma Y, Xu D, Tang Z, Manthari RK, Abdoli N, Azarpira N, Lu Y, Sadeghian I, Mousavifaraz A, Nadgaran A, Nikoozadeh A, Mazloomi S, Mehrabani PS, Rezaei M, Xin H, Mingyu Y, Niknahad H, Heidari R. Taurine mitigates the development of pulmonary inflammation, oxidative stress, and histopathological alterations in a rat model of bile duct ligation. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2022; 395:1557-1572. [PMID: 36097067 DOI: 10.1007/s00210-022-02291-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/06/2022] [Indexed: 10/14/2022]
Abstract
Lung injury is a significant complication associated with cholestasis/cirrhosis. This problem significantly increases the risk of cirrhosis-related morbidity and mortality. Hence, finding effective therapeutic options in this field has significant clinical value. Severe inflammation and oxidative stress are involved in the mechanism of cirrhosis-induced lung injury. Taurine (TAU) is an abundant amino acid with substantial anti-inflammatory and antioxidative properties. The current study was designed to evaluate the role of TAU in cholestasis-related lung injury. For this purpose, bile duct ligated (BDL) rats were treated with TAU (0.5 and 1% w: v in drinking water). Significant increases in the broncho-alveolar lavage fluid (BALF) level of inflammatory cells (lymphocytes, neutrophils, basophils, monocytes, and eosinophils), increased IgG, and TNF-α were detected in the BDL animals (14 and 28 days after the BDL surgery). Alveolar congestion, hemorrhage, and fibrosis were the dominant pulmonary histopathological changes in the BDL group. Significant increases in the pulmonary tissue biomarkers of oxidative stress, including reactive oxygen species formation, lipid peroxidation, increased oxidized glutathione levels, and decreased reduced glutathione, were also detected in the BDL rats. Moreover, significant myeloperoxidase activity and nitric oxide levels were seen in the lung of BDL rats. It was found that TAU significantly blunted inflammation, alleviated oxidative stress, and mitigated lung histopathological changes in BDL animals. These data suggest TAU as a potential protective agent against cholestasis/cirrhosis-related lung injury.
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Affiliation(s)
- Mohammad Mehdi Ommati
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Mobasheri
- Physics, and Technology, Faculty of Medicine, Research Unit of Medical Imaging, University of Oulu, 90014, Oulu, Finland
- Departments of Orthopedics, Rheumatology and Clinical Immunology, University Medical Center Utrecht, 3508 GA, Utrecht, The Netherlands
- Department of Regenerative Medicine, State Research Institute Center for Innovative Medicine, 08406, Vilnius, Lithuania
| | - Yanqin Ma
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Dongmei Xu
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Zhongwei Tang
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Ram Kumar Manthari
- Department of Biotechnology, GITAM Institute of Science, Gandhi Institute of Technology and Management, Visakhapatnam-530045, Andhra Pradesh, India
| | - Narges Abdoli
- Food and Drug Administration, Iran Ministry of Health and Medical Education, Tehran, Iran
| | - Negar Azarpira
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Yu Lu
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Issa Sadeghian
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abolghasem Mousavifaraz
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Nadgaran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmad Nikoozadeh
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sahra Mazloomi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pooria Sayar Mehrabani
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Rezaei
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hu Xin
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Yang Mingyu
- College of Life Sciences, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Hossein Niknahad
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
- Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Reza Heidari
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Li M, Gao Y, Wang Z, Wu B, Zhang J, Xu Y, Han X, Phouthapane V, Miao J. Taurine inhibits Streptococcus uberis-induced NADPH oxidase-dependent neutrophil extracellular traps via TAK1/MAPK signaling pathways. Front Immunol 2022; 13:927215. [PMID: 36148229 PMCID: PMC9488113 DOI: 10.3389/fimmu.2022.927215] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Neutrophil extracellular traps (NETs) are produced by neutrophil activation and usually have both anti-infective and pro-damage effects. Streptococcus uberis (S. uberis), one of the common causative organisms of mastitis, can lead to the production of NETs. Taurine, a free amino acid abundant in the organism, has been shown to have immunomodulatory effects. In this study, we investigated the molecular mechanisms of S. uberis-induced NETs formation and the regulatory role of taurine. The results showed that NETs had a disruptive effect on mammary epithelial cells and barriers, but do not significantly inhibit the proliferation of S. uberis. S. uberis induced NADPH oxidase-dependent NETs. TLR2-mediated activation of the MAPK signaling pathway was involved in this process. Taurine could inhibit the activation of MAPK signaling pathway and NADPH oxidase by modulating the activity of TAK1, thereby inhibiting the production of ROS and NETs. The effects of taurine on NADPH oxidase and NETs in S. uberis infection were also demonstrated in vivo. These results suggest that taurine can protect mammary epithelial cells and barriers from damage by reducing S. uberis-induced NETs. These data provide new insights and strategies for the prevention and control of mastitis.
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Affiliation(s)
- Ming Li
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Yabing Gao
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Zhenglei Wang
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Binfeng Wu
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Jinqiu Zhang
- National Research Center for Veterinary Vaccine Engineering and Technology of China, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yuanyuan Xu
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Xiangan Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Vanhnaseng Phouthapane
- Department of Livestock and Fisheries, Ministry of Agriculture and Forestry, Vientiane, Laos
| | - Jinfeng Miao
- Ministry of Education Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- *Correspondence: Jinfeng Miao,
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Er-Chen Decoction Alleviates High-Fat Diet-Induced Nonalcoholic Fatty Liver Disease in Rats through Remodeling Gut Microbiota and Regulating the Serum Metabolism. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:6221340. [PMID: 35399623 PMCID: PMC8991405 DOI: 10.1155/2022/6221340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/10/2022] [Indexed: 11/21/2022]
Abstract
Many studies have found that the dysfunction in gut microbiota and the metabolic dysfunction can promote nonalcoholic fatty liver disease (NAFLD) development. Er-Chen decoction (EC) can be used in the treatment of NAFLD. However, the mechanism of this hepatoprotection is still unknown. In this study, we constructed a rat model with NAFLD fed with high-fat chow and administered EC treatment. The therapeutic effects of EC on NAFLD were evaluated by measuring transaminases, blood lipid levels, and pathological changes in the liver. In addition, we measured the effects of EC on liver inflammatory response and oxidative stress. The changes in gut microbiota after EC treatment were studied using 16S rRNA sequencing. Serum untargeted metabolomics analysis was also used to study the metabolic regulatory mechanisms of EC on NAFLD. The results showed that EC decreased the serum transaminases and lipid levels and improved the pathological changes in NAFLD rats. Furthermore, EC enhanced the activities of SOD and GSH-Px and decreased MDA level in the liver. EC treatment also decreased the gene and protein levels of IL-6, IL-1β, and TNF-α in the liver and serum. The 16S rRNA sequencing and untargeted metabolomics indicated that EC treatment affected the gut microbiota and regulated serum metabolism. Correlation analysis showed that the effects of EC on taurine and hypotaurine metabolism, cysteine and methionine metabolism, and vitamin B6 metabolism pathways were associated with affecting in the abundance of Lactobacillus, Dubosiella, Lachnospiraceae, Desulfovibri, Romboutsia, Akkermansia, Intestinimonas, and Candidatus_saccharimonas in the gut. In conclusion, our study confirmed the protective effect of EC on NAFLD. EC could treat NAFLD by inhibiting oxidative stress, reducing inflammatory responses, and improving the dysbiosis of gut microbiota and the modulation of the taurine and hypotaurine metabolism, cysteine and methionine metabolism, and vitamin B6 metabolism pathways in serum.
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Surai PF, Earle-Payne K, Kidd MT. Taurine as a Natural Antioxidant: From Direct Antioxidant Effects to Protective Action in Various Toxicological Models. Antioxidants (Basel) 2021; 10:1876. [PMID: 34942978 PMCID: PMC8698923 DOI: 10.3390/antiox10121876] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 12/18/2022] Open
Abstract
Natural antioxidants have received tremendous attention over the last 3 decades. At the same time, the attitude to free radicals is slowly changing, and their signalling role in adaptation to stress has recently received a lot of attention. Among many different antioxidants in the body, taurine (Tau), a sulphur-containing non-proteinogenic β-amino acid, is shown to have a special place as an important natural modulator of the antioxidant defence networks. Indeed, Tau is synthesised in most mammals and birds, and the Tau requirement is met by both synthesis and food/feed supply. From the analysis of recent data, it could be concluded that the direct antioxidant effect of Tau due to scavenging free radicals is limited and could be expected only in a few mammalian/avian tissues (e.g., heart and eye) with comparatively high (>15-20 mM) Tau concentrations. The stabilising effects of Tau on mitochondria, a prime site of free radical formation, are characterised and deserve more attention. Tau deficiency has been shown to compromise the electron transport chain in mitochondria and significantly increase free radical production. It seems likely that by maintaining the optimal Tau status of mitochondria, it is possible to control free radical production. Tau's antioxidant protective action is of great importance in various stress conditions in human life, and is related to commercial animal and poultry production. In various in vitro and in vivo toxicological models, Tau showed AO protective effects. The membrane-stabilizing effects, inhibiting effects on ROS-producing enzymes, as well as the indirect AO effects of Tau via redox balance maintenance associated with the modulation of various transcription factors (e.g., Nrf2 and NF-κB) and vitagenes could also contribute to its protective action in stress conditions, and thus deserve more attention.
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Affiliation(s)
- Peter F. Surai
- Vitagene and Health Research Centre, Bristol BS4 2RS, UK
- Department of Microbiology and Biochemistry, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria
- Biochemistry and Physiology Department, Saint-Petersburg State University of Veterinary Medicine, 196084 St. Petersburg, Russia
- Department of Animal Nutrition, Faculty of Agricultural and Environmental Sciences, Szent Istvan University, H-2103 Gödöllo, Hungary
| | - Katie Earle-Payne
- NHS Greater Glasgow and Clyde, Renfrewshire Health and Social Care Centre, 10 Ferry Road, Renfrew PA4 8RU, UK;
| | - Michael T. Kidd
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA;
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Li M, Wang Z, Qiu Y, Fu S, Xu Y, Han X, Phouthapane V, Miao J. Taurine protects blood-milk barrier integrity via limiting inflammatory response in Streptococcus uberis infections. Int Immunopharmacol 2021; 101:108371. [PMID: 34789427 DOI: 10.1016/j.intimp.2021.108371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 10/28/2021] [Accepted: 11/09/2021] [Indexed: 12/29/2022]
Abstract
Streptococcus uberis (S. uberis) is an important causative agent of mastitis, leading to significant economic losses to dairy industry. This research used a mouse mastitis model to investigate the protective effects of taurine on mammary inflammatory response and blood-milk barrier integrity in S. uberis challenge. The results showed that taurine attenuated S. uberis-induced mammary histopathological changes, especially neutrophil infiltration. The S. uberis-induced expression of pro-inflammatory mediators were decreased significantly by taurine. Further, we demonstrated that taurine limited the S. uberis-induced inflammatory responses via inhibiting the activation of NF-κB and MAPK signaling pathways. Inflammation usually disrupts the mammary barrier system. The recovery of claudin-3 and occludin expressions indicated that attenuation of inflammatory response by taurine can protect the integrity of blood-milk barrier in S. uberis infection. Taken together, our results reveal that the development of taurine as an effective prevention and control strategy for S. uberis-induced mastitis.
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Affiliation(s)
- Ming Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenglei Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yawei Qiu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Shaodong Fu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuanyuan Xu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiangan Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China
| | - Vanhnaseng Phouthapane
- Department of Livestock and Fisheries, Ministry of Agriculture and Forestry, Vientiane, Laos
| | - Jinfeng Miao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
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Ji H, Song N, Ren J, Li W, Zhang L, Xu B, Li H, Shen G, Li H. Systems Toxicology Approaches Reveal the Mechanisms of Hepatotoxicity Induced by Diosbulbin B in Male Mice. Chem Res Toxicol 2020; 33:1389-1402. [PMID: 32148032 DOI: 10.1021/acs.chemrestox.9b00503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Diosbulbin B (DIOB) is an effective component of air potato yam with antitumor and anti-inflammatory activities, and it is the main toxic component leading to hepatotoxicity. However, the mechanism of its hepatotoxicity remains unclear. In this study, we aimed to systematically elucidate the molecular action of DIOB on liver metabolic function through systems toxicology approaches. C57BL/6 mice were orally treated with DIOB (10, 30, 60 mg/kg) for 28 days, and the liver metabonomics and histopathology, molecular docking, mRNA expression levels, and activities of enzymes were analyzed. The results illustrated that DIOB could affect fatty acid and glucose metabolism, block the TCA cycle, and DIOB also could disorder bile acid synthesis and transport and promote the occurrence of hyperbilirubinemia. In addition, DIOB increased Cyp3a11 expression in a dose-dependent manner. Thus, these results provide new insights into the mechanism of hepatotoxicity caused by DIOB.
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Affiliation(s)
- Hainan Ji
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Naining Song
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Juan Ren
- Pneumology Department, The Rocket Army General Hospital of the PLA, Beijing, China
| | - Wentao Li
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Lei Zhang
- Asia Regenerative Medicine Ltd., Shenzhen, China
| | - Baoliang Xu
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Haishan Li
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Guolin Shen
- Institute of Chemicals Safety, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Hua Li
- Beijing Institute of Pharmacology and Toxicology, Beijing, China
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9
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Li B, Wan Z, Wang Z, Zuo J, Xu Y, Han X, Phouthapane V, Miao J. TLR2 Signaling Pathway Combats Streptococcus uberis Infection by Inducing Mitochondrial Reactive Oxygen Species Production. Cells 2020; 9:cells9020494. [PMID: 32098158 PMCID: PMC7072855 DOI: 10.3390/cells9020494] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/09/2020] [Accepted: 02/19/2020] [Indexed: 12/24/2022] Open
Abstract
Mastitis caused by Streptococcus uberis (S. uberis) is a common and difficult-to-cure clinical disease in dairy cows. In this study, the role of Toll-like receptors (TLRs) and TLR-mediated signaling pathways in mastitis caused by S. uberis was investigated using mouse models and mammary epithelial cells (MECs). We used S. uberis to infect mammary glands of wild type, TLR2−/− and TLR4−/− mice and quantified the adaptor molecules in TLR signaling pathways, proinflammatory cytokines, tissue damage, and bacterial count. When compared with TLR4 deficiency, TLR2 deficiency induced more severe pathological changes through myeloid differentiation primary response 88 (MyD88)-mediated signaling pathways during S. uberis infection. In MECs, TLR2 detected S. uberis infection and induced mitochondrial reactive oxygen species (mROS) to assist host in controlling the secretion of inflammatory factors and the elimination of intracellular S. uberis. Our results demonstrated that TLR2-mediated mROS has a significant effect on S. uberis-induced host defense responses in mammary glands as well as in MECs.
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Affiliation(s)
- Bin Li
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
| | - Zhixin Wan
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
| | - Zhenglei Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
| | - Jiakun Zuo
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China;
| | - Yuanyuan Xu
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
| | - Xiangan Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China;
| | - Vanhnaseng Phouthapane
- Biotechnology and Ecology Institute, Ministry of Science and Technology (MOST), Vientiane 22797, Lao PDR;
| | - Jinfeng Miao
- MOE Joint International Research Laboratory of Animal Health and Food Safty, Key Laboratory of Animal Physiology and Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; (B.L.); (Z.W.); (Z.W.); (J.Z.); (Y.X.)
- Correspondence: ; Fax: +86-25-8439-8669
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Miles AR, Hawrysh PJ, Hossein-Javaheri N, Buck LT. Taurine activates glycine and GABA A receptor currents in anoxia-tolerant painted turtle pyramidal neurons. ACTA ACUST UNITED AC 2018; 221:jeb.181529. [PMID: 30237241 DOI: 10.1242/jeb.181529] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 09/13/2018] [Indexed: 11/20/2022]
Abstract
Unlike anoxia-intolerant mammals, painted turtles can survive extended periods without oxygen. This is partly accomplished by an anoxia-mediated increase in gamma-aminobutyric acid (GABA) release, which activates GABA receptors and mediates spike arrest in turtle neurons via shunting inhibition. Extracellular taurine levels also increase during anoxia; why this occurs is unknown but it is speculated that glycine and/or GABAA/B receptors are involved. Given the general importance of inhibitory neurotransmission in the anoxia-tolerant painted turtle brain, we investigated the function of taurine as an inhibitory neuromodulator in turtle pyramidal neurons. Using whole-cell patch-clamp electrophysiological methods to record from neurons within a cortical brain sheet, we found that taurine depolarized membrane potential by ∼8 mV, increased whole-cell conductance ∼2-fold, and induced an inward current that possessed characteristics similar to GABA- and glycine-evoked currents. These effects were mitigated following glycine receptor antagonism with strychnine and GABAA receptor antagonism with gabazine, bicuculine or picrotoxin, but were unchanged following GABAB or glutamatergic receptor inhibition. These data indicate that a high concentration of taurine in vitro mediates its effects through both glycine and GABAA receptors, and suggests that taurine, in addition to GABA, inhibits neuronal activity during anoxia in the turtle cortex.
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Affiliation(s)
- Ashley R Miles
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada M5S 3G5
| | - Peter J Hawrysh
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada M5S 3G5
| | | | - Leslie T Buck
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada M5S 3G5 .,Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada, M5S 3G5
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11
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Ma ZL, Gao Y, Ma HT, Zheng LH, Dai B, Miao JF, Zhang YS. Effects of taurine and housing density on renal function in laying hens. J Zhejiang Univ Sci B 2017; 17:952-964. [PMID: 27921400 DOI: 10.1631/jzus.b1600014] [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] [Indexed: 12/18/2022]
Abstract
This study investigated the putative protective effects of supplemental 2-aminoethane sulfonic acid (taurine) and reduced housing density on renal function in laying hens. We randomly assigned fifteen thousand green-shell laying hens into three groups: a free range group, a low-density caged group, and a high-density caged group. Each group was further divided equally into a control group (C) and a taurine treatment group (T). After 15 d, we analyzed histological changes in kidney cells, inflammatory mediator levels, oxidation and anti-oxidation levels. Experimental data revealed taurine supplementation, and rearing free range or in low-density housing can lessen morphological renal damage, inflammatory mediator levels, and oxidation levels and increase anti-oxidation levels. Our data demonstrate that taurine supplementation and a reduction in housing density can ameliorate renal impairment, increase productivity, enhance health, and promote welfare in laying hens.
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Affiliation(s)
- Zi-Li Ma
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.,Animal Husbandry and Veterinary Bureau of Dongyang City in Zhejiang Province, Dongyang 322100, China
| | - Yang Gao
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Hai-Tian Ma
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Liu-Hai Zheng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Bin Dai
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jin-Feng Miao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuan-Shu Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
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12
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Jiang KF, Zhao G, Deng GZ, Wu HC, Yin NN, Chen XY, Qiu CW, Peng XL. Polydatin ameliorates Staphylococcus aureus-induced mastitis in mice via inhibiting TLR2-mediated activation of the p38 MAPK/NF-κB pathway. Acta Pharmacol Sin 2017; 38:211-222. [PMID: 27890916 DOI: 10.1038/aps.2016.123] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 10/18/2016] [Indexed: 01/01/2023] Open
Abstract
Recent studies show that Polydatin (PD) extracted from the roots of Polygonum cuspidatum Sieb, a widely used traditional Chinese remedies, possesses anti-inflammatory activity in several experimental models. In this study, we investigated the anti-inflammatory effects of PD on Staphylococcus aureus-induced mastitis in mice and elucidated the potential mechanisms. In mice with S aureus-induced mastitis, administration of PD (15, 30, 45 mg/kg, ip) or dexamethasone (Dex, 5 mg/kg, ip) significantly suppressed the infiltration of inflammatory cells, ameliorated the mammary structural damage, and inhibited the activity of myeloperoxidase, a biomarker of neutrophils accumulation. Furthermore, PD treatment dose-dependently decreased the levels of TNF-α, IL-1β, IL-6 and IL-8 in the mammary gland tissues. PD treatment also dose-dependently decreased the expression of TLR2, MyD88, IRAK1, IRAK4 and TRAF6 as well as the phosphorylation of TAK1, MKK3/6, p38 MAPK, IκB-α and NF-κB in the mammary gland tissues. In mouse mammary epithelial cells (mMECs) infected by S aureus in vitro, pretreatment with PD dose-dependently suppressed the upregulated pro-inflammatory cytokines and signaling proteins, and the nuclear translocation of NF-κB p65 and AP-1. A TLR2-neutralizing antibody mimicked PD in its suppression on S aureus-induced upregulation of MyD88, p-p38 and p-p65 levels in mMECs. PD (50, 100 μg/mL) affected neither the growth of S aureus in vitro, nor the viability of mMECs. In conclusion, PD does not exhibit antibacterial activity against S aureus, its therapeutic effects in mouse S aureus-induced mastitis depend on its ability to down-regulate pro-inflammatory cytokine levels via inhibiting TLR2-mediated activation of the p38 MAPK/NF-κB signaling pathway.
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Dai B, Zhang YS, Ma ZL, Zheng LH, Li SJ, Dou XH, Gong JS, Miao JF. Influence of dietary taurine and housing density on oviduct function in laying hens. J Zhejiang Univ Sci B 2016; 16:456-64. [PMID: 26055907 DOI: 10.1631/jzus.b1400256] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Experiments were conducted to study the effects of dietary taurine and housing density on oviduct function in laying hens. Green-shell laying hens were randomly assigned to a free range group and two caged groups, one with low-density and the other with high-density housing. Each group was further divided into control (C) and taurine treatment (T) groups. All hens were fed the same basic diet except that the T groups' diet was supplemented with 0.1% taurine. The experiment lasted 15 d. Survival rates, laying rates, daily feed consumption, and daily weight gain were recorded. Histological changes, inflammatory mediator levels, and oxidation and anti-oxidation levels were determined. The results show that dietary taurine supplementation and reduced housing density significantly attenuated pathophysiological changes in the oviduct. Nuclear factor-κB (NF-κB) DNA binding activity increased significantly in the high-density housing group compared with the two other housing groups and was reduced by taurine supplementation. Tumor necrosis factor-α (TNF-α) mRNA expression in the high-density and low-density C and T groups increased significantly. In the free range and low-density groups, dietary taurine significantly reduced the expression of TNF-α mRNA. Supplementation with taurine decreased interferon-γ (IFN-γ) mRNA expression significantly in the low-density groups. Interleukin 4 (IL-4) mRNA expression was significantly higher in caged hens. IL-10 mRNA expression was higher in the high-density C group than in the free range and low-density C groups. Supplementation with taurine decreased IL-10 mRNA expression significantly in the high-density group and increased superoxide dismutase (SOD) activity in the free range hens. We conclude that taurine has important protective effects against oviduct damage. Reducing housing density also results in less oxidative stress, less inflammatory cell infiltration, and lower levels of inflammatory mediators in the oviduct. Therefore, both dietary taurine and reduced housing density can ameliorate oviduct injury, enhance oviduct health, and promote egg production in laying hens.
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Affiliation(s)
- Bin Dai
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; Animal Husbandry and Veterinary Bureau of Dongyang, Dongyang 322100, China; Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou 225125, China
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14
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Alcaraz LD, Martínez-Sánchez S, Torres I, Ibarra-Laclette E, Herrera-Estrella L. The Metagenome of Utricularia gibba's Traps: Into the Microbial Input to a Carnivorous Plant. PLoS One 2016; 11:e0148979. [PMID: 26859489 PMCID: PMC4747601 DOI: 10.1371/journal.pone.0148979] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 01/26/2016] [Indexed: 02/01/2023] Open
Abstract
The genome and transcriptome sequences of the aquatic, rootless, and carnivorous plant Utricularia gibba L. (Lentibulariaceae), were recently determined. Traps are necessary for U. gibba because they help the plant to survive in nutrient-deprived environments. The U. gibba's traps (Ugt) are specialized structures that have been proposed to selectively filter microbial inhabitants. To determine whether the traps indeed have a microbiome that differs, in composition or abundance, from the microbiome in the surrounding environment, we used whole-genome shotgun (WGS) metagenomics to describe both the taxonomic and functional diversity of the Ugt microbiome. We collected U. gibba plants from their natural habitat and directly sequenced the metagenome of the Ugt microbiome and its surrounding water. The total predicted number of species in the Ugt was more than 1,100. Using pan-genome fragment recruitment analysis, we were able to identify to the species level of some key Ugt players, such as Pseudomonas monteilii. Functional analysis of the Ugt metagenome suggests that the trap microbiome plays an important role in nutrient scavenging and assimilation while complementing the hydrolytic functions of the plant.
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Affiliation(s)
- Luis David Alcaraz
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, AP 70–275, 04510, Ciudad Universitaria, Ciudad de México, México
| | - Shamayim Martínez-Sánchez
- Laboratorio Nacional de Ciencias de la Sostenibilidad, Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, AP 70–275, 04510, Ciudad Universitaria, Ciudad de México, México
| | - Ignacio Torres
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, 58190, Morelia, Michoacán, México
| | - Enrique Ibarra-Laclette
- Red de Estudios Moleculares Avanzados, Instituto de Ecología, A.C, 91070, Carretera antigua a Coatepec 351, El Haya Xalapa, Veracruz, México
- Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Km 9.6 Carretera Irapuato-León, 36821, Irapuato, Guanajuato, México
| | - Luis Herrera-Estrella
- Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Km 9.6 Carretera Irapuato-León, 36821, Irapuato, Guanajuato, México
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Ferreira Eduardo da Costa A, Alfredo Moraes J, Silva Santos de Oliveira J, Hanthequeste Bittencourt Dos Santos M, da Silva Santos G, Barja-Fidalgo C, Luiza Mattos-Guaraldi A, Emy Nagao P. Reactive oxygen species involved in apoptosis induction of human respiratory epithelial (A549) cells by Streptococcus agalactiae. MICROBIOLOGY-SGM 2015; 162:94-99. [PMID: 26490153 DOI: 10.1099/mic.0.000202] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Streptococcus agalactiae (Group B Streptococcus; GBS) is an important pathogen and is associated with pneumonia, sepsis and meningitis in neonates and adults. GBS infections induce cytotoxicity of respiratory epithelial cells (A549) with generation of reactive oxygen species (ROS) and loss of mitochondrial membrane potential (ψm). The apoptosis of A549 cells by GBS was dependent on the activation of caspase-3 and caspase-9 with increased pro-apoptotic Bim and Bax molecules and decreased Bcl-2 pro-survival protein. Treatment of infected A549 cells with ROS inhibitors (diphenyleniodonium chloride or apocynin) prevented intracellular ROS production and apoptosis. Consequently, oxidative stress is included among the cellular events leading to apoptosis during GBS human invasive infections.
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Affiliation(s)
- Andréia Ferreira Eduardo da Costa
- Laboratory of Molecular Biology and Physiology of Streptococci, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - João Alfredo Moraes
- Laboratory of Biochemical and Cellular Pharmacology, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Jessica Silva Santos de Oliveira
- Laboratory of Molecular Biology and Physiology of Streptococci, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | | | - Gabriela da Silva Santos
- Laboratory of Molecular Biology and Physiology of Streptococci, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Christina Barja-Fidalgo
- Laboratory of Biochemical and Cellular Pharmacology, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Ana Luiza Mattos-Guaraldi
- Laboratory of Diphtheria and Corynebacteria of Clinical Relevance (LDCIC), Faculty of Medical Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Prescilla Emy Nagao
- Laboratory of Molecular Biology and Physiology of Streptococci, Instituto de Biologia Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
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16
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Guo MY, Li WY, Zhang Z, Qiu C, Li C, Deng G. Betulin suppresses S. aureus-induced mammary gland inflammatory injury by regulating PPAR-γ in mice. Int Immunopharmacol 2015; 29:824-831. [PMID: 26344430 DOI: 10.1016/j.intimp.2015.08.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/22/2015] [Accepted: 08/28/2015] [Indexed: 01/21/2023]
Abstract
Mastitis is a postpartum disease in both humans and animals. Staphylococcus aureus (S. aureus) can induce mastitis by infection of the lactiferous ducts. There is no efficacious treatment for S. aureus-induced mastitis. Betulin has been confirmed to have multiple biological activities, including anti-inflammatory properties. The present study was to determine the anti-inflammatory effect of betulin on S. aureus-induced mastitis and to confirm the mechanism of action involved. In vivo, betulin ameliorated the histopathological changes that were induced by S. aureus. ELISA and qPCR results showed that betulin inhibited TNF-α, IL-1β and IL-6 production. Western blotting results demonstrated that betulin inhibited NF-κB phosphorylation but promoted the expression of PPAR-γ. Further investigations were performed in vitro with mouse Mammary Epithelial Cells (mMECs). The results indicated the betulin inhibited the activity of the NF-κB pathway and increased PPAR-γ expression and transcriptional activity. All of the results in the present study demonstrated that betulin played a protective anti-inflammatory role against S. aureus infection in mammary gland tissues and cells by activating PPAR-γ and inhibiting the activation of NF-κB.
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Affiliation(s)
- Meng-Yao Guo
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Wen-Yu Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Zhenbiao Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Changwei Qiu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Chengye Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Ganzhen Deng
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
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Zhang J, Miao J, Hou J, Lu C. The effects of H3N2 swine influenza virus infection on TLRs and RLRs signaling pathways in porcine alveolar macrophages. Virol J 2015; 12:61. [PMID: 26021751 PMCID: PMC4487856 DOI: 10.1186/s12985-015-0284-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Accepted: 03/23/2015] [Indexed: 12/02/2022] Open
Abstract
Background Swine influenza is an economically important respiratory disease of swine resulting from infection with influenza A virus. Swine influenza virus (SIV) becomes the focus as pigs have been hypothesized to serve as an intermediate host for the adaptation of avian influenza viruses to humans or as mixing vessels for the generation of genetically reassortant viruses. The ability of the innate immune system to detect and respond to pathogens is important for survival. Therefore, there is a critical need to evaluate the immediate response to viral infection, especially the role of the toll-like receptors (TLRs) and RNA helicase RIG-I-like receptors (RLRs) innate immunity signaling pathways in H3N2 swine influenza virus infection. Method In this study, porcine alveolar macrophages (PAMs) were obtained from porcine lungs and were infected with SIV at a multiplicity of infection (MOI) of 5 in vitro. The changes of the related receptors, signaling proteins and effector molecules of TLRs and RLRs signaling pathways post H3N2 virus infection of PAMs were quantified by Real-time quantitative RT-PCR and western blotting. Results The results showed that H3N2 SIV infection significantly increased mRNA expression of TLR-3, TLR-7, RIG- I and MDA5 after 4 hpi (P < 0.05). Western blotting showed that the protein levels of TLR-3, TLR-7 and RIG-I also had a significantly increase after PAM exposed to virus. A significant change of MyD88, MAVS, IRF-3 and IRF-7 mRNA expression were present at 8 hpi. More than a 4-fold increase was induced for TNF-α and IL-1β mRNA expression. And the concentration of TNF-α and IL-1β peaked at 12 and 24 hpi, respectively. IFN-α, IFN-β mRNA and protein levels increased after SIV infection and significant differences was observed at 8, 12 and 24 hpi. Conclusion These results indicate that H3N2 swine influenza virus infection significantly influences the expression of the receptors, adapter proteins and downstream effector molecules of RLRs and TLRs signaling pathways. This study enhances our understanding of innate immunity signaling pathways in PAM anti-infection of H3N2 SIV.
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Affiliation(s)
- Jinqiu Zhang
- National Research Center for Veterinary Vaccine Engineering and Technology of China, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China. .,College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jinfeng Miao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jibo Hou
- National Research Center for Veterinary Vaccine Engineering and Technology of China, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
| | - Chengping Lu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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Zhang W, Chen L, Zhang L, Xiao M, Ding J, Goltzman D, Miao D. Administration of exogenous 1,25(OH)2D3 normalizes overactivation of the central renin-angiotensin system in 1α(OH)ase knockout mice. Neurosci Lett 2015; 588:184-9. [PMID: 25576706 DOI: 10.1016/j.neulet.2015.01.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 12/31/2014] [Accepted: 01/05/2015] [Indexed: 12/21/2022]
Abstract
Previously, we reported that active vitamin D deficiency in mice causes secondary hypertension and cardiac dysfunction, but the underlying mechanism remains largely unknown. To clarify whether exogenous active vitamin D rescues hypertension by normalizing the altered central renin-angiotensin system (RAS) via an antioxidative stress mechanism, 1-alpha-hydroxylase [1α(OH)ase] knockout mice [1α(OH)ase(-/-)] and their wild-type littermates were fed a normal diet alone or with 1,25-dihydroxyvitamin D3 [1,25(OH)2D3], or a high-calcium, high-phosphorus "rescue" diet with or without antioxidant N-acetyl-l-cysteine (NAC) supplementation for 4 weeks. Compared with their wild-type littermates, 1α(OH)ase(-/-)mice had high mean arterial pressure, increased levels of renin, angiotensin II (Ang II), and Ang II type 1 receptor, and increased malondialdehyde levels, but decreased anti-peroxiredoxin I and IV proteins and the antioxidative genes glutathione reductase (Gsr) and glutathione peroxidase 4 (Gpx4) in the brain samples. Except Ang II type 1 receptor, these pathophysiological changes were rescued by exogenous 1,25(OH)2D3 or NAC plus rescue diet, but not by rescue diet alone. We conclude that 1,25(OH)2D3 normalizes the altered central RAS in 1α(OH)ase(-/-)mice, at least partially, through a central antioxidative mechanism.
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Affiliation(s)
- Wei Zhang
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China; Department of Human Anatomy, Kangda College, Lianyungang, PR China
| | - Lulu Chen
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
| | - Luqing Zhang
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China.
| | - Ming Xiao
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
| | - Jiong Ding
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
| | - David Goltzman
- Calcium Research Laboratory, McGill University Health Center and Department of Medicine, McGill University, Montréal, Québec, Canada
| | - Dengshun Miao
- Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
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Role of ROS Production and Turnover in the Antioxidant Activity of Taurine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 803:581-96. [PMID: 25833529 DOI: 10.1007/978-3-319-15126-7_47] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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