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Zhou H, Zou L, Ren H, Shen Z, Lin Y, Cai H, Zhang J. Cathelicidin-BF regulates the AMPK/SIRT1/NF-κB pathway to ameliorate murine osteoarthritis: In vitro and in vivo studie. Int Immunopharmacol 2024; 134:112201. [PMID: 38718660 DOI: 10.1016/j.intimp.2024.112201] [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: 01/25/2024] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 06/03/2024]
Abstract
Osteoarthritis (OA) is a chronic degenerative disease with a significant prevalence that causes cartilage damage and can lead to disability. The main factors contributing to the onset and progression of OA include inflammation and degeneration of the extracellular matrix. Cathelicidin-BF (BF-30), a natural peptide derived from Bungarus fasciatus venom, has shown multiple important pharmacological effects. However, the action mechanism of BF-30 in OA treatment remains to be elucidated. In this research, X-ray and Safranin O staining were employed to evaluate the imageology and histomorphology differences in the knee joints of mice in vivo. Techniques such as Western blot analysis, RT-qPCR, ELISA, and immunofluorescence staining were applied to examine gene and protein level changes in in vitro experiments. It was found that BF-30 significantly decreased inflammation and enhanced extracellular matrix metabolism. For the first time, it was demonstrated that the positive effects of BF-30 are mediated through the activation of the AMPK/SIRT1/NF-κB pathway. Moreover, when BF-30 was co-administered with Compound C, an AMPK inhibitor, the therapeutic benefits of BF-30 were reversed in both in vivo and in vitro settings. In conclusion, the findings suggest that BF-30 could be a novel therapeutic agent for OA improvement.
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Affiliation(s)
- Hao Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China; Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai 200031, China.
| | - Linfang Zou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China; Bone Research Institute, The Key Orthopaedic Laboratory of Zhejiang Province, Wenzhou, China
| | - Hui Ren
- Central Laboratory, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Zhenyu Shen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China; Bone Research Institute, The Key Orthopaedic Laboratory of Zhejiang Province, Wenzhou, China
| | - Yuanqu Lin
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China; Bone Research Institute, The Key Orthopaedic Laboratory of Zhejiang Province, Wenzhou, China
| | - Haikang Cai
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai 200031, China.
| | - Jingdong Zhang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China; Bone Research Institute, The Key Orthopaedic Laboratory of Zhejiang Province, Wenzhou, China.
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Nong K, Liu Z, Qin X, Chen W, Zhang B, Wu Y, Wang Z, Fang X, Liu Y, Wang X, Shi H, Zhang H. Effect of the Pseudopleuronectes americanus-derived Pleurocidin on DSS-induced Ulcerative colitis in mice and its preliminary molecular mechanisms. Int Immunopharmacol 2024; 130:111757. [PMID: 38422770 DOI: 10.1016/j.intimp.2024.111757] [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: 12/14/2023] [Revised: 02/03/2024] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Pleurocidin is an antimicrobial peptide derived from the mucous membranes of the skin or intestinal secretions of Pseudopleuronectes americanus that has antimicrobial and immunomodulatory activities. Ulcerative colitis is recognized as a widespread human disease that may be influenced by environmental and genetic factors. Evidence emphasizes the critical role of the gut microbiota in UC. Synthetic Pleurocidin was analyzed by a combination of liquid chromatography and mass spectrometry. Pleurocidin pharmacological effects were evaluated by DAI score, colon histological score, cytokine levels, and tight junction protein expression in mice. The preliminary molecular mechanism was explored by the levels of key proteins in the NF-κB and MAPK inflammatory signaling pathways in colon tissues. The main analytical methods such as immunohistochemistry, immunofluorescence, enzyme-linked immunosorbent assay (ELISA), and Western blot were used. We then used 16S rRNA gene sequences to characterize the gut microbiota. Firstly, our study demonstrated that rectal injection of Pleurocidin at 5 mg/kg body weight alleviated clinical symptoms and colonic histopathological changes in UC mice caused by DSS. Secondly, Pleurocidin altered the abnormal levels of inflammatory and immune-related cytokines in serum, modulated the significant down-regulation of tight junction proteins, and inhibited the expression of NF-κB and MAPK inflammatory signaling pathway-related proteins. Finally, Pleurocidin can regulate gut microbiota, increase the relative abundance of beneficial bacteria and reduce the relative abundance of harmful bacteria. In conclusion, Pleurocidin alleviates UC symptoms in mice, and its effects on the gut microbiome may be potential pathways. It is providing a promising therapeutic option for UC.
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Affiliation(s)
- Keyi Nong
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Zhineng Liu
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Xinyun Qin
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Wanyan Chen
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Bin Zhang
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Yijia Wu
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Zihan Wang
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Xin Fang
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Youming Liu
- Yibin Academy of Agricultural Sciences, Yibin 644600, China
| | - Xuemei Wang
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Huiyu Shi
- College of Tropical Agriculture and Forestry, Hainan University, China
| | - Haiwen Zhang
- College of Tropical Agriculture and Forestry, Hainan University, China.
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Liu Z, Qin X, Nong K, Fang X, Zhang B, Chen W, Wang Z, Wu Y, Shi H, Wang X, Zhang H. Oral administration of LfcinB alleviates DSS-induced colitis by improving the intestinal barrier and microbiota. Food Funct 2024; 15:2038-2051. [PMID: 38293816 DOI: 10.1039/d3fo05236b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Ulcerative colitis (UC) is a kind of inflammatory bowel disease (IBD) that often recurs and is difficult to cure, and no drugs with few side effects are available to treat this disease. LfcinB is a small molecular peptide obtained by the hydrolysis of bovine lactoferrin in the digestive tract of animals. It has strong antibacterial and anti-inflammatory activities. However, direct evidence that LfcinB improves the condition of colitis in mice is rarely reported. In this study, UC was induced in mice by adding 2.5% dextran sulfate (DSS) to drinking water and LfcinB was orally administered. The results showed that oral administration of LfcinB improved colonic tissue damage and inflammatory cell infiltration, increased the expression of tight junction proteins, and down-regulated the phosphorylation of proteins related to the NF-κB/MAPK inflammatory signalling pathway in mice. It also significantly suppressed the relative abundance of potentially pathogenic bacteria (Bacteroides, Barnesiella and Escherichia) in the intestinal flora. In conclusion, oral administration of LfcinB significantly alleviated DSS-induced UC. This may be related to the regulation of inflammatory signalling pathways and gut microbial composition by LfcinB.
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Affiliation(s)
- Zhineng Liu
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Xinyun Qin
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Keyi Nong
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Xin Fang
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Bin Zhang
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Wanyan Chen
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Zihan Wang
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Yijia Wu
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Huiyu Shi
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Xuemei Wang
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
| | - Haiwen Zhang
- College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737, China.
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Sun Y, Li H, Duan X, Ma X, Liu C, Shang D. Chensinin-1b Alleviates DSS-Induced Inflammatory Bowel Disease by Inducing Macrophage Switching from the M1 to the M2 Phenotype. Biomedicines 2024; 12:345. [PMID: 38397947 PMCID: PMC10886634 DOI: 10.3390/biomedicines12020345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/28/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic relapsing inflammatory disorder with an increasing prevalence worldwide. Macrophage polarization is involved in the pathogenesis of IBD. Repolarization of macrophage has thus emerged as a novel therapeutic approach for managing IBD. Chensinin-1b, derived from the skin of Rana chensinensis, is a derivative of a native antimicrobial peptide (AMP). It shows anti-inflammatory effects in sepsis models and can potentially modulate macrophage polarization. The objective of this research was to study the role of chensinin-1b in macrophage polarization and dextran sulfate sodium (DSS)-induced colitis. RAW264.7 macrophages were polarized to the M1 phenotype using lipopolysaccharide (LPS) and simultaneously administered chensinin-1b at various concentrations. The ability of chenisnin-1b to reorient macrophage polarization was assessed by ELISA, qRT-PCR, and flow cytometry analysis. The addition of chensinin-1b significantly restrained the expression of M1-associated proinflammatory cytokines and surface markers, including TNF-α, IL-6, NO, and CD86, and exaggerated the expression of M2-associated anti-inflammatory cytokines and surface markers, including IL-10, TGF-β1, Arg-1, Fizz1, Chil3, and CD206. Mechanistically, via Western Blotting, we revealed that chensinin-1b induces macrophage polarization from the M1 to the M2 phenotype by inhibiting the phosphorylation of nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinase (MAPK). In mouse models of colitis, intraperitoneal administration of chensinin-1b alleviated symptoms induced by DSS, including weight loss, elevated disease activity index (DAI) scores, colon shortening, colonic tissue damage, and splenomegaly. Consistent with our in vitro data, chensinin-1b induced significant decreases in the expression of M1 phenotype biomarkers and increases in the expression of M2 phenotype biomarkers in the mouse colitis model. Furthermore, chensinin-1b treatment repressesed NF-κB phosphorylation in vivo. Overall, our data showed that chensinin-1b attenuates IBD by repolarizing macrophages from the M1 to the M2 phenotype, suggesting its potential as a therapeutic candidate for IBD.
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Affiliation(s)
- Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Huiyu Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Xingpeng Duan
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Xiaoxiao Ma
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Chenxi Liu
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
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Dong X, Shan H, Wang S, Jiang Z, Wang S, Qin Z. High expression of antimicrobial peptides cathelicidin-BF in Pichia pastoris and verification of its activity. Front Microbiol 2023; 14:1153365. [PMID: 37362941 PMCID: PMC10288212 DOI: 10.3389/fmicb.2023.1153365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 05/19/2023] [Indexed: 06/28/2023] Open
Abstract
Antibacterial peptides are endogenous polypeptides produced by multicellular organisms to protect the host against pathogenic microbes, they show broad spectrum antimicrobial activities against various microorganisms and possess low propensity for developing resistance. The purpose of this study is to develop recombinant antibacterial peptide cathelicidin-BF by genetic engineering and protein engineering technology, and study its antibacterial activity in vitro and in vivo, so as to provide reference for the production and application of recombinant antibacterial peptide cathelicidin-BF. In this study, on account of Pichia pastoris eukaryotic expression system, we expressed and prepared antibacterial peptide cathelicidin-BF. Then, the minimum inhibitory concentration of antibacterial peptide cathelicidin-BF and the comparison with the antibacterial activity of antibiotics were determined through the antibacterial experiment in vitro. Chickens as infection model were used to verify the antibacterial peptide activity in vivo. The results show that the bacteriostatic ability of antibacterial peptide cathelicidin-BF is similar to that of antibiotics in certain concentration, and can reach the treatment level of antibiotics. Although the mode of administration of antibacterial peptide is still limited, this study can provide reference for the future research of antibacterial peptide.
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Affiliation(s)
- Xufeng Dong
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Hu Shan
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Shubai Wang
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Zhengjun Jiang
- Shandong Hwatson Biochem Co. Ltd, Weifang, Shandong, China
| | - Shaojuan Wang
- Shandong Hwatson Biochem Co. Ltd, Weifang, Shandong, China
| | - Zhihua Qin
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
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Shih CC, Liao WC, Ke HY, Kuo CW, Tsao CM, Tsai WC, Chiu YL, Huang HC, Wu CC. Antimicrobial peptide cathelicidin LL-37 preserves intestinal barrier and organ function in rats with heat stroke. Biomed Pharmacother 2023; 161:114565. [PMID: 36958193 DOI: 10.1016/j.biopha.2023.114565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/25/2023] Open
Abstract
Global warming increases the incidence of heat stroke (HS) and HS causes the reduction of visceral blood flow during hyperthermia, leading to intestinal barrier disruption, microbial translocation, systemic inflammation and multiple organ failure. Cathelicidin LL-37 exhibits antimicrobial activities, helps innate immunity within the gut to maintain intestinal homeostasis, and augments intestinal wound healing and barrier function. Thus, we evaluated the effects and possible mechanisms of cathelicidin LL-37 on HS. Wistar rats were placed in a heating-chamber of 42 ̊C to induce HS. Changes in rectal temperature, hemodynamic parameters, and survival rate were measured during the experimental period. Blood samples and ilea were collected to analyze the effects of LL-37 on systemic inflammation, multiple organ dysfunction, and intestinal injury. Furthermore, LS174T and HT-29 cells were used to assess the underlying mechanisms. Our data showed cathelicidin LL-37 ameliorated the damage of intestinal cells induced by HS. Intestinal injury, systemic inflammation, and nitrosative stress (high nitric oxide level) caused by continuous hyperthermia were attenuated in HS rats treated with cathelicidin LL-37, and hence, improved multiple organ dysfunction, coagulopathy, and survival rate. These beneficial effects of cathelicidin LL-37 were attributed to the protection of intestinal goblet cells (by increasing transepithelial resistance, mucin-2 and Nrf2 expression) and the improvement of intestinal barrier function (less cyclooxygenase-2 expression and FITC-dextran translocation). Interestingly, high cathelicidin expression in the ileal samples of inflammatory bowel disease patients was associated with better clinical outcome. These results suggest that cathelicidin LL-37 could prevent heat stress-induced intestinal damage and heat-related illnesses.
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Affiliation(s)
- Chih-Chin Shih
- Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan, ROC.
| | - Wei-Chieh Liao
- Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Hung-Yen Ke
- Division of Cardiovascular Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Chia-Wen Kuo
- Department of Nephrology, Taichung Armed Forces General Hospital, Taichung, Taiwan, ROC
| | - Cheng-Ming Tsao
- Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming Chiao-Tung University, Taipei, Taiwan, ROC
| | - Wen-Chiuan Tsai
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Yi-Lin Chiu
- Department of Biochemistry, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Hsieh-Chou Huang
- Department of Anesthesiology, Cheng-Hsin General Hospital, Taipei, Taiwan, ROC
| | - Chin-Chen Wu
- Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan, ROC.
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Past, Present, and Future of Naturally Occurring Antimicrobials Related to Snake Venoms. Animals (Basel) 2023; 13:ani13040744. [PMID: 36830531 PMCID: PMC9952678 DOI: 10.3390/ani13040744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/22/2023] Open
Abstract
This review focuses on proteins and peptides with antimicrobial activity because these biopolymers can be useful in the fight against infectious diseases and to overcome the critical problem of microbial resistance to antibiotics. In fact, snakes show the highest diversification among reptiles, surviving in various environments; their innate immunity is similar to mammals and the response of their plasma to bacteria and fungi has been explored mainly in ecological studies. Snake venoms are a rich source of components that have a variety of biological functions. Among them are proteins like lectins, metalloproteinases, serine proteinases, L-amino acid oxidases, phospholipases type A2, cysteine-rich secretory proteins, as well as many oligopeptides, such as waprins, cardiotoxins, cathelicidins, and β-defensins. In vitro, these biomolecules were shown to be active against bacteria, fungi, parasites, and viruses that are pathogenic to humans. Not only cathelicidins, but all other proteins and oligopeptides from snake venom have been proteolyzed to provide short antimicrobial peptides, or for use as templates for developing a variety of short unnatural sequences based on their structures. In addition to organizing and discussing an expressive amount of information, this review also describes new β-defensin sequences of Sistrurus miliarius that can lead to novel peptide-based antimicrobial agents, using a multidisciplinary approach that includes sequence phylogeny.
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Meng M, Huo R, Wang Y, Ma N, Shi X, Shen X, Chang G. Lentinan inhibits oxidative stress and alleviates LPS-induced inflammation and apoptosis of BMECs by activating the Nrf2 signaling pathway. Int J Biol Macromol 2022; 222:2375-2391. [PMID: 36243161 DOI: 10.1016/j.ijbiomac.2022.10.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/22/2022] [Accepted: 10/04/2022] [Indexed: 11/05/2022]
Abstract
Lentinan (LNT) has been reported to have a wide range of functions, including anti-inflammatory, antioxidant and anticancer properties. LNT may provide a protective effect in dairy cow mastitis. In this study, we investigated the effect of LNT on lipopolysaccharide (LPS)-induced injury of bovine mammary epithelial cells (BMECs) and the possible mechanism. First, we treated BMECs with different concentrations of LPS to study the effects of LPS on oxidative stress and inflammation in BMECs. Then, we examined the effects of LNT by dividing the cells into seven groups: the control group (CON), LPS treatment group (LPS), Acetyl-l-cysteine (NAC) pretreatment group (NAC + LPS), LNT pretreatment group (LNT + LPS), ML385 and LNT pretreatment group (ML385 + LNT + LPS), LNT treatment group (LNT) and NAC treatment group (NAC). The results showed that LPS-triggered intracellular ROS production and the downregulation of Nrf-2 and HO-1 in BMECs were blocked by LNT pretreatment. LNT inhibited the expression of inflammatory genes and proteins by inhibiting of NF-κB and MAPK. In addition, LNT attenuated LPS induced-apoptosis in BMECs. However, ML385 reversed the protective effect of LNT. Taken together, LNT can be used as a natural protective agent against LPS-triggered BMECs damage through its anti-inflammatory, antioxidant and antiapoptotic effects through modulation of the Nrf2 pathway.
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Affiliation(s)
- Meijuan Meng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Ran Huo
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Yan Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Nana Ma
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Xiaoli Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Xiangzhen Shen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Guangjun Chang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China; Animal Disease Prevention and Control Center of Ningxia Hui Autonomous Region, Yinchuan 750001, Ningxia, China.
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He Y, Peng L, Zhao X, Fan X, Tang X, Shi G, Li S. Selenium Deficiency Induces Inflammatory Response and Decreased Antimicrobial Peptide Expression in Chicken Jejunum Through Oxidative Stress. Biol Trace Elem Res 2022; 201:3461-3473. [PMID: 36208383 DOI: 10.1007/s12011-022-03442-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/03/2022] [Indexed: 11/28/2022]
Abstract
Selenium deficiency can affect the level of selenoprotein in organs and tissues and cause inflammation. However, the mechanism of selenium deficiency on jejunal injury in chickens remains unclear. In this study, we established a selenium deficiency model in chickens by feeding a low selenium diet and observed ultrastructural and pathological changes in the jejunum. The expression levels of 25 selenoproteins, the levels of oxidative stress, tight junction (TJ) proteins, and antimicrobial peptides (AMP), as well as the expression levels of factors related to inflammatory signaling pathways, were examined in the intestine and analyzed using principal component analysis (PCA). The results of PCA and quantitative real-time PCR (qRT-PCR) showed that selenium deficiency mainly affected the expression of antioxidant selenoproteins in chicken jejunum, especially glutathione peroxidases, thioredoxin reductase, and iodothyronine deiodinase, thus weakening the antioxidant function in the intestine and inducing oxidative stress. We also found disruption of intestinal TJ structures, a significant reduction in TJ protein expression, and downregulation of antimicrobial peptide levels, suggesting that selenium deficiency led to damage of the intestinal barrier. In addition, a significant increase in inflammatory cell infiltration and expression of inflammatory factors was observed in the jejunum, indicating that selenium deficiency induces inflammatory injury. In conclusion, selenium deficiency downregulates antioxidant selenoproteins levels, induces oxidative stress, decreases intestinal AMP levels, and leads to inflammatory injury and disruption of the intestinal barrier in the jejunum. These results shed new light on the molecular mechanisms of intestinal damage caused by selenium deficiency.
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Affiliation(s)
- Yujiao He
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Lin Peng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xiaochun Zhao
- Animal Disease Control and Prevention of Heilongjiang Province, Harbin, 150069, China
| | - Xue Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xinyu Tang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Guangliang Shi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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Wang X, Ji Y, Qiu C, Zhang H, Bi L, Xi H, Lei L, Liu B, Han W, Gu J. A phage cocktail combined with the enteric probiotic Lactobacillus reuteri ameliorated mouse colitis caused by S. typhimurium. Food Funct 2022; 13:8509-8523. [PMID: 35876802 DOI: 10.1039/d2fo00699e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Salmonella enterica serovar Typhimurium (S. typhimurium) is one of the most important foodborne pathogens that causes colitis in humans. In this study, we compared the effects of a therapeutic treatment using a phage cocktail (Pc) in combination or not with Lactobacillus reuteri (L. reuteri) in an S. typhimurium-induced colitis murine model. An oral administration of 4 × 108 CFU per mouse of S. typhimurium resulted in intestinal barrier disruption and severe inflammatory symptoms. S. typhimurium in the colon of the mice treated with the Pc and L. reuteri (PcLR) combination were completely removed compared to those in the single Pc or single L. reuteri treatment groups. Furthermore, compared with the infected group, the intestinal barrier and colonic pathological damage were significantly improved in the PcLR-treated group. Additionally, the short-chain fatty acid (SCFA) levels in the feces of the mice in the PcLR treatment group were significantly increased compared to those in the feces of the mice in the infected group. In addition, the combination of Pc with acetate and reuterin released by L. reuteri (PcReAc) can also achieve the same effect as PcLR treatment. Thus, these results indicated that the acetate and reuterin released by L. reuteri play an important role in the treatment. The extraordinary therapeutic effects of PcLR and PcReAc depend on the specific bactericidal activity of Pc and the broad-spectrum bactericidal activity and immunomodulation of L. reuteri (or acetate and reuterin) in the host. This study provides a new concept for the treatment of inflammatory diseases caused by intestinal pathogens.
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Affiliation(s)
- Xinwu Wang
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Yalu Ji
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Cao Qiu
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Hao Zhang
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Lanting Bi
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Hengyu Xi
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Liancheng Lei
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China.
| | - Bing Liu
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, People's Republic of China
| | - Wenyu Han
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China. .,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, People's Republic of China
| | - Jingmin Gu
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, Changchun 130062, People's Republic of China. .,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, People's Republic of China
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11
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Wang X, Xing Y, Ji Y, Xi H, Liu X, Yang L, Lei L, Han W, Gu J. The Combination of Phages and Faecal Microbiota Transplantation Can Effectively Treat Mouse Colitis Caused by Salmonella enterica Serovar Typhimurium. Front Microbiol 2022; 13:944495. [PMID: 35875536 PMCID: PMC9301289 DOI: 10.3389/fmicb.2022.944495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 06/03/2022] [Indexed: 11/17/2022] Open
Abstract
Salmonella enterica serovar Typhimurium (S. Typhimurium) is one of the common causes of human colitis. In the present study, two lytic phages vB_SenS-EnJE1 and vB_SenS-EnJE6 were isolated and the therapeutic effect of the combination of phages and faecal microbiota transplantation (FMT) on S. Typhimurium-induced mouse colitis was investigated. The characteristics and genome analysis indicated that they are suitable phages for phage therapy. Results showed that vB_SenS-EnJE1 lysis 41/54 Salmonella strains of serotype O4, and vB_SenS-EnJE6 lysis 46/54 Salmonella strains of serotypes O4 and O9. Severe inflammatory symptoms and disruption of the intestinal barrier were observed in S. Typhimurium -induced colitis. Interestingly, compared with a single phage cocktail (Pc) or single FMT, the combination of Pc and FMT (PcFMT) completely removed S. Typhimurium after 72 h of treatment, and significantly improved pathological damage and restored the intestinal barrier. Furthermore, PcFMT effectively restored the intestinal microbial diversity, especially for Firmicutes/Bacteroidetes [predominantly bacterial phyla responsible for the production of short-chain fatty acids (SCFA)]. Additionally, we found that PcFMT treatment significantly increased the levels of SCFA. All these data indicated that the combination of phages and FMT possesses excellent therapeutic effects on S. Typhimurium -induced intestinal microbiota disorder diseases. Pc and FMT played roles in “eliminating pathogens” and “strengthening vital qi,” respectively. This study provides a new idea for the treatment of intestinal microbiota disorder diseases caused by specific bacterial infections.
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Affiliation(s)
- Xinwu Wang
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
| | - Yating Xing
- The Second Hospital of Jilin University, Changchun, China
| | - Yalu Ji
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
| | - Hengyu Xi
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
| | - Xiaohe Liu
- The Second Hospital of Jilin University, Changchun, China
| | - Li Yang
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
| | - Liancheng Lei
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
| | - Wenyu Han
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
| | - Jingmin Gu
- State Key Laboratory for Zoonotic Diseases, Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Jilin, China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- *Correspondence: Jingmin Gu,
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12
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Xue H, Song W, Wang Z, Wang Q. Ulva prolifera Polysaccharide–Manganese Alleviates Inflammation and Regulates Microbiota Composition in Dextran Sulfate Sodium-Induced Colitis Mice. Front Microbiol 2022; 13:916552. [PMID: 35722338 PMCID: PMC9205199 DOI: 10.3389/fmicb.2022.916552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 04/20/2022] [Indexed: 11/17/2022] Open
Abstract
Manganese (Mn) deficiency exacerbates colitis symptoms, whereas diet supplemented with inorganic Mn merely maintains colon length in experimental colitis. In the present study, a new form of Mn, Ulva prolifera polysaccharide cheated-Mn (PMn) was used and its treatment effects on dextran sulfate sodium (DSS)-induced colitis were investigated. Male C57BL/6 mice were orally administrated with 3.5% DSS to induce colitis. Then, the colitis mice were treated with PBS or PMn for 7 days. The results showed that PMn administration help retrieve the body weight loss and intestinal morphology damage, and alleviate apoptosis and inflammatory responses in colitis mice. Moreover, PMn administration decreased intestinal infiltration as indicated by decreased concentration of myeloperoxidase and eosinophil peroxidase. Importantly, PMn retrieved the increased abundance of Firmicutes and the decreased abundance of Bacteroidetes caused by DSS, suggested its beneficial roles in regulating microbiota composition in mice with colon inflammation. Gut microbiota composition at the genus level in the mice administrated with PMn was similar to those in control mice, whereas they were clearly distinct from DSS-treated mice. These results support the potential therapeutic role of PMn in the treatment of intestinal colitis and microbes may play critical roles in mediating its effects.
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Affiliation(s)
- Haoran Xue
- Department of Clinical Laboratory, Qilu Hospital (Qingdao) of Shandong University, Qingdao, China
| | - Wei Song
- Ministry of Natural Resources (MNR) Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Zongling Wang
- Ministry of Natural Resources (MNR) Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Qian Wang
- Department of Clinical Laboratory, Qilu Hospital (Jinan) of Shandong University, Jinan, China
- *Correspondence: Qian Wang
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13
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Liu S, Cao Y, Ma L, Sun J, Ramos-Mucci L, Ma Y, Yang X, Zhu Z, Zhang J, Xiao B. Oral antimicrobial peptide-EGCG nanomedicines for synergistic treatment of ulcerative colitis. J Control Release 2022; 347:544-560. [PMID: 35580812 DOI: 10.1016/j.jconrel.2022.05.025] [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: 09/27/2021] [Revised: 04/30/2022] [Accepted: 05/11/2022] [Indexed: 11/16/2022]
Abstract
The pathogenesis of ulcerative colitis (UC) is associated with severe inflammation, damaged colonic barriers, increased oxidative stress, and intestinal dysbiosis. The majority of current medications strive to alleviate inflammation but fail to target additional disease pathologies. Addressing multiple symptoms using a single 'magic bullet' remains a challenge. To overcome this, a smart epigallocatechin-3-gallate (EGCG)-loaded silk fibroin-based nanoparticle (NP) with the surface functionalization of antimicrobial peptides (Cathelicidin-BF, CBF) was constructed, which were internalized by Colon-26 cells and RAW 264.7 macrophages with high efficiencies. These CBF-EGCG-NPs efficiently restored colonic epithelial barriers by relieving oxidative stress and promoting epithelium migration. They also alleviated immune responses through the downregulation of pro-inflammatory factors, upregulation of anti-inflammatory factors, M2 macrophage polarization, and lipopolysaccharide (LPS) elimination. Interestingly, oral administration of hydrogel (chitosan/alginate)-embedding CBF-EGCG-NPs could not only retard progression and treat UC, but also modulate intestinal microbiota by increasing their overall diversity and richness and augmenting the abundance of beneficial bacteria (e.g., Firmicutes and Lactobacillaceae). Our work provides a "many birds with one stone" strategy for addressing UC symptoms using a single NP-based oral platform that targets immune microenvironment modulation, LPS clearance, and microbial remodeling.
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Affiliation(s)
- Shengsheng Liu
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China
| | - Yingui Cao
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China
| | - Lingli Ma
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China
| | - Jianfeng Sun
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Headington, Oxford OX3 7LD, UK
| | - Lorenzo Ramos-Mucci
- Botnar Research Centre, Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Headington, Oxford OX3 7LD, UK
| | - Ya Ma
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China; Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Beibei, Chongqing 400715, China
| | - Xiao Yang
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China
| | - Zhenhua Zhu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Jianxiang Zhang
- Department of Pharmaceutics, College of Pharmacy, Third Military Medical University (Army Medical University), Shapingba, Chongqing 400038, China
| | - Bo Xiao
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile, and Biomass Sciences, Southwest University, Beibei, Chongqing 400715, China; Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Beibei, Chongqing 400715, China.
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14
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Kini A, Zhao B, Basic M, Roy U, Iljazovic A, Odak I, Ye Z, Riederer B, Di Stefano G, Römermann D, Koenecke C, Bleich A, Strowig T, Seidler U. Upregulation of antimicrobial peptide expression in slc26a3-/- mice with colonic dysbiosis and barrier defect. Gut Microbes 2022; 14:2041943. [PMID: 35230892 PMCID: PMC8890434 DOI: 10.1080/19490976.2022.2041943] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Genetic defects in SLC26A3 (DRA), an intestinal Cl-/HCO3- exchanger, result in congenital chloride diarrhea (CLD), marked by lifelong acidic diarrhea and a high risk of inflammatory bowel disease. Slc26a3-/- mice serve as a model to understand the pathophysiology of CLD and search for treatment options. This study investigates the microbiota changes in slc26a3-/- colon, the genotype-related causes for the observed microbiota alterations, its inflammatory potential, as well as the corresponding host responses. The luminal and the mucosa-adherent cecal and colonic microbiota of cohoused slc26a3-/- and wt littermates were analyzed by 16S rRNA gene sequencing. Fecal microbiota transfer from cohoused slc26a3-/- and wt littermates to germ-free wt mice was performed to analyze the stability and the inflammatory potential of the communities.The cecal and colonic luminal and mucosa-adherent microbiota of slc26a3-/- mice was abnormal from an early age, with a loss of diversity, of short-chain fatty acid producers, and an increase of pathobionts. The transfer of slc26a3-/- microbiota did not result in intestinal inflammation and the microbial diversity in the recipient mice normalized over time. A strong increase in the expression of Il22, Reg3β/γ, Relmβ, and other proteins with antimicrobial functions was observed in slc26a3-/- colon from juvenile age, while the mucosal and systemic inflammatory signature was surprisingly mild. The dysbiotic microbiota, low mucosal pH, and mucus barrier defect in slc26a3-/- colon are accompanied by a stark upregulation of the expression of a panel of antimicrobial proteins. This may explain the low inflammatory burden in the gut of these mice.
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Affiliation(s)
| | - Bei Zhao
- Microbial Immune Regulation Research Group, Helmholtz Center for Infection Research, Braunschweig, Germany
| | | | - Urmi Roy
- Microbial Immune Regulation Research Group, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Aida Iljazovic
- Microbial Immune Regulation Research Group, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Ivan Odak
- Institute of Immunology Hannover Medical School Hannover, Germany
| | | | | | | | | | | | | | - Till Strowig
- Microbial Immune Regulation Research Group, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Ursula Seidler
- Department of Gastroenterology,CONTACT Ursula Seidler Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl Neuberg Straße 1, D30625, Hannover.de, Germany
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15
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Vitamin D 3 Protects Mice from Diquat-Induced Oxidative Stress through the NF- κB/Nrf2/HO-1 Signaling Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6776956. [PMID: 34824670 PMCID: PMC8610683 DOI: 10.1155/2021/6776956] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/19/2021] [Accepted: 10/29/2021] [Indexed: 12/12/2022]
Abstract
Vitamin D3, as an indispensable and fat-soluble micronutrient, plays an important role in the health of humans and animals. At present, studies are focusing on the calcium absorption and immunoregulation function of vitamin D3; this study was aimed at exploring the antioxidative stress ability of vitamin D3 on diquat-induced intestinal dysfunction of ICR mice and the underlying mechanism. The results showed that oral gavage of vitamin D3 daily significantly improved the body weight gain and immune organ index and significantly reverted the abnormal changes of ALT, AST, SOD, GSH-Px, T-AOC, and MDA in the serum and jejunum induced by diquat. The addition of vitamin D3 also significantly reduced the concentration of DAO, D-LA, and certain proinflammatory cytokines in serum. Moreover, vitamin D3 improved the pathological morphology of the duodenum, jejunum, colon, liver, and kidney tissues, and it also largely attenuated the degree of inflammatory infiltration of macrophages and cell apoptotic index of jejunal epithelial tissue induced by diquat. The results demonstrated that vitamin D3 significantly recovered the intestinal barrier injury by enhancing the expression of mucins and tight junction proteins in the jejunum. In addition, the results indicated that vitamin D3 could significantly reduce the phosphorylation level of NF-κB (p65) and enhance the expression of Nrf2 and HO-1 in the jejunum compared with the diquat-induced group. This study suggested that oral administration of vitamin D3 can protect mice against oxidative damage by inhibiting the phosphorylation level of NF-κB (p65) and activating Nrf2-related signaling pathways.
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16
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Wang S, Kai L, Zhu L, Xu B, Chen N, Valencak TG, Wang Y, Shan T. Cathelicidin-WA Protects Against LPS-Induced Gut Damage Through Enhancing Survival and Function of Intestinal Stem Cells. Front Cell Dev Biol 2021; 9:685363. [PMID: 34381773 PMCID: PMC8350165 DOI: 10.3389/fcell.2021.685363] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/25/2021] [Indexed: 12/22/2022] Open
Abstract
Preservation of intestinal stem cells (ISCs) plays a critical role in initiating epithelial regeneration after intestinal injury. Cathelicidin peptides have been shown to participate in regulating intestinal damage repair. However, it is not known how exactly Cathelicidin-WA (CWA) exert its function after tissue damage. Using a gut injury model in mice involving Lipopolysaccharide (LPS), we observed that CWA administration significantly improved intestinal barrier function, preserved ISCs survival, and augmented ISCs viability within the small intestine (SI) under LPS treatment. In addition, CWA administration effectively prevented proliferation stops and promoted the growth of isolated crypts. Mechanistically, our results show that the appearance of γH2AX was accompanied by weakened expression of SETDB1, a gene that has been reported to safeguard genome stability. Notably, we found that CWA significantly rescued the decreased expression of SETDB1 and reduced DNA damage after LPS treatment. Taken together, CWA could protect against LPS-induced gut damage through enhancing ISCs survival and function. Our results suggest that CWA may become an effective therapeutic regulator to treat intestinal diseases and infections.
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Affiliation(s)
- Sisi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Lixia Kai
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Luoyi Zhu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Bocheng Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Nana Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
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17
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Rádis-Baptista G. Cell-Penetrating Peptides Derived from Animal Venoms and Toxins. Toxins (Basel) 2021; 13:147. [PMID: 33671927 PMCID: PMC7919042 DOI: 10.3390/toxins13020147] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/31/2021] [Accepted: 02/09/2021] [Indexed: 12/18/2022] Open
Abstract
Cell-penetrating peptides (CPPs) comprise a class of short polypeptides that possess the ability to selectively interact with the cytoplasmic membrane of certain cell types, translocate across plasma membranes and accumulate in the cell cytoplasm, organelles (e.g., the nucleus and mitochondria) and other subcellular compartments. CPPs are either of natural origin or de novo designed and synthesized from segments and patches of larger proteins or designed by algorithms. With such intrinsic properties, along with membrane permeation, translocation and cellular uptake properties, CPPs can intracellularly convey diverse substances and nanomaterials, such as hydrophilic organic compounds and drugs, macromolecules (nucleic acids and proteins), nanoparticles (nanocrystals and polyplexes), metals and radionuclides, which can be covalently attached via CPP N- and C-terminals or through preparation of CPP complexes. A cumulative number of studies on animal toxins, primarily isolated from the venom of arthropods and snakes, have revealed the cell-penetrating activities of venom peptides and toxins, which can be harnessed for application in biomedicine and pharmaceutical biotechnology. In this review, I aimed to collate examples of peptides from animal venoms and toxic secretions that possess the ability to penetrate diverse types of cells. These venom CPPs have been chemically or structurally modified to enhance cell selectivity, bioavailability and a range of target applications. Herein, examples are listed and discussed, including cysteine-stabilized and linear, α-helical peptides, with cationic and amphipathic character, from the venom of insects (e.g., melittin, anoplin, mastoparans), arachnids (latarcin, lycosin, chlorotoxin, maurocalcine/imperatoxin homologs and wasabi receptor toxin), fish (pardaxins), amphibian (bombesin) and snakes (crotamine and cathelicidins).
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Affiliation(s)
- Gandhi Rádis-Baptista
- Laboratory of Biochemistry and Biotechnology, Institute for Marine Sciences, Federal University of Ceara, Fortaleza 60165-081, Brazil
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18
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Fabisiak N, Fabisiak A, Chmielowiec-Korzeniowska A, Tymczyna L, Kamysz W, Kordek R, Bauer M, Kamysz E, Fichna J. Anti-inflammatory and antibacterial effects of human cathelicidin active fragment KR-12 in the mouse models of colitis: a novel potential therapy of inflammatory bowel diseases. Pharmacol Rep 2020; 73:163-171. [PMID: 33219923 PMCID: PMC7862075 DOI: 10.1007/s43440-020-00190-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 10/31/2020] [Accepted: 11/03/2020] [Indexed: 12/11/2022]
Abstract
Introduction Inflammatory bowel diseases (IBD) are a group of chronic gastrointestinal tract disorders with complex etiology, with intestinal dysbiosis as the most prominent factor. In this study, we assessed the anti-inflammatory and antibacterial actions of the human cathelicidin LL-37 and its shortest active fragment, KR-12 in the mouse models of colitis. Materials and methods Mouse models of colitis induced by 2,4,6-trinitrobenzenesulfonic acid (TNBS) and dextran sulfate sodium (DSS) were used in the study. The extent of inflammation was evaluated based on the macro- and microscopic scores, quantification of myeloperoxidase (MPO) activity and microbiological analysis of stool samples. Results A preliminary study with LL-37 and KR-12 (1 mg/kg, ip, twice daily) showed a decrease in macroscopic and ulcer scores in the acute TNBS-induced model of colitis. We observed that KR-12 (5 mg/kg, ip, twice daily) reduced microscopic and ulcer scores in the semi-chronic and chronic TNBS-induced models of colitis compared with inflamed mice. Furthermore, qualitative and quantitative changes in colonic microbiota were observed: KR-12 (5 mg/kg, ip, twice daily) decreased the overall number of bacteria, Escherichia coli and coli group bacteria. In the semi-chronic DSS-induced model, KR-12 attenuated intestinal inflammation as demonstrated by a reduction in macroscopic score and colon damage score and MPO activity. Conclusions We demonstrated that KR-12 alleviates inflammation in four different mouse models of colitis what suggests KR-12 and cathelicidins as a whole are worth being considered as a potential therapeutic option in the treatment of IBD.
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Affiliation(s)
- Natalia Fabisiak
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland
- Department of Gastroenterology, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Adam Fabisiak
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland
- Department of Digestive Tract Diseases, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | | | - Leszek Tymczyna
- Department of Animal Hygiene and Environment, University of Agriculture in Lublin, Lublin, Poland
| | - Wojciech Kamysz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Gdansk, Poland
| | - Radzisław Kordek
- Department of Pathology, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Marta Bauer
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Gdansk, Poland
| | - Elżbieta Kamysz
- Department of Molecular Biotechnology, Faculty of Chemistry, University of Gdansk, Gdansk, Poland
| | - Jakub Fichna
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland.
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19
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Jin Z, Chen Q, Tan L, Jia B, Liu Y. WITHDRAWN: Novel long-acting BF-30 conjugate corrects pancreatic carcinoma via cytoplasmic membrane permeabilization and DNA-binding in tumor-bearing mice. Life Sci 2020:118278. [PMID: 32798555 DOI: 10.1016/j.lfs.2020.118278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/08/2020] [Accepted: 08/10/2020] [Indexed: 10/23/2022]
Abstract
This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Zhe Jin
- The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Qingmin Chen
- The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Ludong Tan
- The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Baoxing Jia
- The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - Yahui Liu
- The First Hospital of Jilin University, Changchun, Jilin 130021, China.
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20
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Effects of antimicrobial peptide cathelicidin-BF on diarrhea controlling, immune responses, intestinal inflammation and intestinal barrier function in piglets with postweaning diarrhea. Int Immunopharmacol 2020; 85:106658. [PMID: 32531710 DOI: 10.1016/j.intimp.2020.106658] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 05/11/2020] [Accepted: 05/29/2020] [Indexed: 02/07/2023]
Abstract
The objective was to evaluate the effects of antimicrobial peptide cathelicidin-BF (C-BF) treatment on diarrhea controlling, immune responses, intestinal inflammation, and intestinal barrier function in piglets with postweaning diarrhea. In this study, fifty-four weaned piglets with diarrhea were selected and treated with saline (control), C-BF or norfloxacin nicotinic (NFN) for 7 days. Here, we investigated the effects of C-BF on diarrhea controlling, growth performance, serum immune indicators, intestinal morphology, intestinal inflammation, and intestinal epithelial barrier function in the weaned piglets with diarrhea. The results showed that C-BF treatment decreased (P < 0.05) diarrheal index and increased (P < 0.05) average daily gain (ADG) and average daily feed intake (ADFI) compared with control group. C-BF treatment decreased (P < 0.05) levels of serum blood urea nitrogen (BUN) and aspartate aminotransferase (AST), but increased (P < 0.05) levels of serum A/G and alkaline phosphatase (ALP) compared with control group. The concentrations of IL-6, IL-8, tumor necrosis factor-α (TNF-α), and IgG were lower (P < 0.05), but IgA was greater (P < 0.05) for piglets treated by C-BF compared with those in control group. C-BF and NFN treatment decreased (P < 0.05) IL-6, IL-8, IL-22, IL-10 and transforming growth factor-β (TGF-β) production in the jejunum and ileum compared with the control group. C-BF treatment increased the expression levels of zonula occluden-1 (ZO-1), Occludin, and Claudin-1 in the jejunum and colon compared with the control group and the NFN group. In conclusion, these data indicate that C-BF treatment may be an effective therapeutic strategy for controlling post-weaning diarrhea, improving immune responses, attenuating intestinal inflammation and enhancing intestinal barrier function in piglets with postweaning diarrhea.
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Yang B, Good D, Mosaiab T, Liu W, Ni G, Kaur J, Liu X, Jessop C, Yang L, Fadhil R, Yi Z, Wei MQ. Significance of LL-37 on Immunomodulation and Disease Outcome. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8349712. [PMID: 32509872 PMCID: PMC7246396 DOI: 10.1155/2020/8349712] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 03/04/2020] [Accepted: 04/03/2020] [Indexed: 02/07/2023]
Abstract
LL-37, also called cathelicidin, is an important part of the human immune system, which can resist various pathogens. A plethora of experiments have demonstrated that it has the multifunctional effects of immune regulation, in addition to antimicrobial activity. Recently, there have been increasing interest in its immune function. It was found that LL-37 can have two distinct functions in different tissues and different microenvironments. Thus, it is necessary to investigate LL-37 immune functions from the two sides of the same coin. On the one side, LL-37 promotes inflammation and immune response and exerts its anti-infective and antitumor effects; on the other side, it has the ability to inhibit inflammation and promote carcinogenesis. This review presents a brief summary of its expression, structure, and immunomodulatory effects as well as brief discussions on the role of this small peptide as a key factor in the development and treatment of various inflammation-related diseases and cancers.
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Affiliation(s)
- Binbin Yang
- School of Medical Laboratory, Key Laboratory of Clinical Laboratory Diagnostics in Universities of Shandong, Weifang Medical University, Weifang 261053, China
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - David Good
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
- School of Allied Health, Australian Catholic University, Brisbane, Qld 4014, Australia
| | - Tamim Mosaiab
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
- Institute for Glycomics, Griffith University, Gold Coast, Qld 4215, Australia
| | - Wei Liu
- School of Medical Laboratory, Key Laboratory of Clinical Laboratory Diagnostics in Universities of Shandong, Weifang Medical University, Weifang 261053, China
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - Guoying Ni
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
- The First Affiliated Hospital/School of Clinical Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China
- School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Qld 4558, Australia
| | - Jasmine Kaur
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - Xiaosong Liu
- The First Affiliated Hospital/School of Clinical Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China
- School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Qld 4558, Australia
- Cancer Research Institute, First People's Hospital of Foshan, Foshan 528000, China
| | - Calvin Jessop
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - Lu Yang
- School of Medical Laboratory, Key Laboratory of Clinical Laboratory Diagnostics in Universities of Shandong, Weifang Medical University, Weifang 261053, China
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - Rushdi Fadhil
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
| | - Zhengjun Yi
- School of Medical Laboratory, Key Laboratory of Clinical Laboratory Diagnostics in Universities of Shandong, Weifang Medical University, Weifang 261053, China
| | - Ming Q. Wei
- School of Medical Science & Menzies Health Institute Queensland, Griffith University, Gold Coast, Qld 4215, Australia
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Hitchhiking with Nature: Snake Venom Peptides to Fight Cancer and Superbugs. Toxins (Basel) 2020; 12:toxins12040255. [PMID: 32326531 PMCID: PMC7232197 DOI: 10.3390/toxins12040255] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/25/2020] [Accepted: 04/09/2020] [Indexed: 12/24/2022] Open
Abstract
Abstract For decades, natural products in general and snake venoms (SV) in particular have been a rich source of bioactive compounds for drug discovery, and they remain a promising substrate for therapeutic development. Currently, a handful of SV-based drugs for diagnosis and treatment of various cardiovascular disorders and blood abnormalities are on the market. Likewise, far more SV compounds and their mimetics are under investigation today for diverse therapeutic applications, including antibiotic-resistant bacteria and cancer. In this review, we analyze the state of the art regarding SV-derived compounds with therapeutic potential, focusing on the development of antimicrobial and anticancer drugs. Specifically, information about SV peptides experimentally validated or predicted to act as antimicrobial and anticancer peptides (AMPs and ACPs, respectively) has been collected and analyzed. Their principal activities both in vitro and in vivo, structures, mechanisms of action, and attempts at sequence optimization are discussed in order to highlight their potential as drug leads. Key Contribution This review describes the state of the art in snake venom-derived peptides and their therapeutic applications. This work reinforces the potential of snake venom components as therapeutic agents, particularly in the quest for new antimicrobial and anticancer drugs.
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23
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Song W, Li Y, Zhang X, Wang Z. Potent anti-inflammatory activity of polysaccharides extracted from Blidingia minima and their effect in a mouse model of inflammatory bowel disease. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.103494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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24
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Liu H, Cao X, Wang H, Zhao J, Wang X, Wang Y. Antimicrobial peptide KR-32 alleviates Escherichia coli K88-induced fatty acid malabsorption by improving expression of fatty acid transporter protein 4 (FATP4)1. J Anim Sci 2019; 97:2342-2356. [PMID: 30958881 DOI: 10.1093/jas/skz110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/04/2019] [Indexed: 01/02/2023] Open
Abstract
Bacterial infection causes nutrient malabsorption in small intestine. KR-32, a kind of synthetic antimicrobial peptide, has the bacteriostatic effect. In the present study, 2 experiments were designed to analyze the effects of KR-32 on fat absorption of piglets with or without Escherichia coli infection. In Exp. 1, 12 weaning piglets (21 d old) were allocated to 2 groups: piglets with an intraperitoneal (i.p.) injection of antimicrobial peptide KR-32 (APK) and piglets with an i.p. injection of an equivalent volume (1 mL) of phosphate-buffered saline (PBS) (CON-1). Results showed that after 7 d of growth, KR-32 did not significantly change growth performance and apparent total tract digestibility (ATTD) of feed nutrients of normal pigs. To confirm whether KR-32 affects those of enterotoxigenic Escherichia coli (ETEC) K88-challenged pigs, we performed Exp. 2, in which 18 piglets (28 d old) were divided into the following 3 groups: 1) piglets orally challenged with 1 × 1010 cfu ETEC K88 on day 1 followed by an i.p. injection of 0.6 mg/kg KR-32 (K88 + APK); 2) piglets orally challenged with 1 × 1010 cfu ETEC K88 on day 1 followed by an i.p. injection of an equivalent volume (1 mL) of PBS (K88); and 3) piglets with an oral administration of fresh Luria-Bertani broth (50 mL) followed by an i.p. injection of an equivalent volume of PBS (CON-2). Results showed that ETEC K88 challenge led to poor ADFI, ADG, and G:F in piglets; decreased ATTD of feed nutrients, especially CP and ether extract (EE); and intestinal morphology disorder. After i.p. injection of KR-32, ADG and ATTD of CP and EE were greatly increased, G:F was significantly reduced (P < 0.05), and, especially, ATTD of EE returned to a normal level compared with group CON-2. Fatty acid absorption also highly increased after KR-32 injection. Then we focused on fat digestion and fatty acid uptake. The pH in the intestine and pancreas lipase showed no difference among the 3 treatment groups, whereas fatty acid transporter protein 4 (FATP4) expression was remarkably improved (P < 0.05) and the epithelial barrier was recovered after i.p. injection of KR-32. In conclusion, KR-32, given to ETEC K88-challenged piglets, improved growth performance, ATTD of EE, fatty acid absorption, and intestinal morphology, which indicated that KR-32 was likely to improve the expression of FATP4 and by repairing the epithelial barrier, thereby alleviating fatty acid malabsorption.
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Affiliation(s)
- Heyuan Liu
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Xiaoxuan Cao
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Hong Wang
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Jian Zhao
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Xinxia Wang
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Yizhen Wang
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key Laboratory of Animal Nutrition and Feed, Ministry of Agriculture, Key Laboratory of Animal Nutrition and Feed Science of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, P.R. China
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25
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Zong X, Cao X, Wang H, Xiao X, Wang Y, Lu Z. Cathelicidin-WA Facilitated Intestinal Fatty Acid Absorption Through Enhancing PPAR-γ Dependent Barrier Function. Front Immunol 2019; 10:1674. [PMID: 31379865 PMCID: PMC6650583 DOI: 10.3389/fimmu.2019.01674] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/04/2019] [Indexed: 01/28/2023] Open
Abstract
The molecular mechanisms underlying the cellular uptake of long-chain fatty acids and the regulation of this process have been debated in recent decades. Here, we established an intestinal barrier dysfunction model in mice and Caco2 cell line by Lipopolysaccharide (LPS), and evaluated the fatty acid uptake capacity of the intestine. We found that LPS stimulation restricted the absorption of long chain fatty acid (LCFA), while Cathelicidin-WA (CWA) pretreatment facilitated this physiological process. At the molecular level, our results demonstrated that the stimulatory effects of CWA on intestinal lipid absorption were dependent on cluster determinant 36 and fatty acid transport protein 4, but not fatty acid–binding protein. Further, an enhanced intestinal barrier was observed in vivo and in vitro when CWA alleviated the fatty acid absorption disorder induced by LPS stimulation. Mechanistically, peroxisome proliferator-activated receptor (PPAR-γ) signaling was considered as a key pathway for CWA to enhance LCFA absorption and barrier function. Treatment with a PPAR-γ inhibitor led to impaired intestinal barrier function and suppressed LCFA uptake. Moreover, once PPAR-γ signaling was blocked, CWA pretreatment could not maintain the stability of the intestinal epithelial cell barrier or LCFA uptake after LPS stimulation. Collectively, these findings suggested that PPAR-γ may serve as a target for specific therapies aimed at alleviating fatty acid uptake disorder, and CWA showed considerable potential as a new PPAR-γ agonist to strengthen intestinal barrier function against fatty acid malabsorption.
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Affiliation(s)
- Xin Zong
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Xiaoxuan Cao
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Hong Wang
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Xiao Xiao
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Yizhen Wang
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Zeqing Lu
- Key Laboratory of Animal Nutrition and Feed Science in Eastern China, Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
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26
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Zhai Z, Zhang F, Cao R, Ni X, Xin Z, Deng J, Wu G, Ren W, Yin Y, Deng B. Cecropin A Alleviates Inflammation Through Modulating the Gut Microbiota of C57BL/6 Mice With DSS-Induced IBD. Front Microbiol 2019; 10:1595. [PMID: 31354682 PMCID: PMC6635700 DOI: 10.3389/fmicb.2019.01595] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/26/2019] [Indexed: 12/14/2022] Open
Abstract
The present study is undertaken to assess the alleviating effects of antimicrobial peptide cecropin A on inflammatory bowel disease (IBD) in C57BL/6 mice and changes in the gut microbiota, compared to an antibiotic gentamicin. Different doses of cecropin A were intraperitoneally injected into C57BL/6 mice for 5 days to determine the safe doses. The injection doses at ≤ 15 mg/kg showed no negative impact on the liver, heart, spleen, and kidney. The severe and moderate IBD mice model was successfully established via supplementation of 4 or 2.5% dextran sulfate sodium (DSS) in drinking water for 5 days. The severe IBD model was used to ensure the optimal therapeutic dose of cecropin A. Survival rate, body weight and disease activity index (DAI) scores were measured. Administration of 15 mg/kg, not 5 mg/kg cecropin A, for 5 days increased survival rate and decreased body weight loss of mice. The moderate IBD model was applied to investigate the mechanisms for cecropin A to alleviate inflammation in comparison to gentamicin. The mice were treated with 15 mg/kg cecropin A or 5 mg/kg gentamicin for 3 days. The levels of cytokines and related proteins in the colon were detected by ELISA and Western blotting. The microbiota in cecum contents were analyzed using 16S rRNA gene sequencing. The results showed that cecropin A and gentamicin relieved body weight loss, DAI, and gut mucosa disruption, while decreasing tumor necrosis factor-α (TNF-α), interlukin-1β (IL-1β), and interlukin-6 (IL-6) induced by DSS. In addition, cecropin A and gentamicin showed different effects on the gut microbiota structure. Both cecropin A and gentamicin decreased DSS-induced enrichment of Bacteroidaceae and Enterobacteriaceae. However, cecropin A showed a selective enrichment of Lactobacillus in contrast to gentamicin, which demonstrated a selective effect on Desulfovibrionaceae and Ruminococcaceae. Cecropin A alleviates IBD through decreasing harmful gut microflora and specifically enhancing beneficial gut microflora. The mechanism of this effect is different from gentamicin.
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Affiliation(s)
- Zhenya Zhai
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Fan Zhang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Ruihua Cao
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Xiaojun Ni
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Zhongquan Xin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Jinping Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Guoyao Wu
- Department of Animal Science, Texas A&M University, College Station, TX, United States
| | - Wenkai Ren
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
| | - Yulong Yin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China.,National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Baichuan Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, Subtropical Institute of Animal Nutrition and Feed, South China Agricultural University, Guangzhou, China
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27
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Haiwen Z, Rui H, Bingxi Z, Qingfeng G, Beibei W, Jifeng Z, Xuemei W, Kebang W. Cathelicidin- derived PR39 protects enterohemorrhagic Escherichia coli O157:H7 challenged mice by improving epithelial function and balancing the microbiota in the intestine. Sci Rep 2019; 9:9456. [PMID: 31263234 PMCID: PMC6603261 DOI: 10.1038/s41598-019-45913-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 06/20/2019] [Indexed: 12/21/2022] Open
Abstract
The zoonotic enterohaemorrhagic Escherichia coli (EHEC) O157:H7 can disrupt intestinal epithelial barrier function and in turn leading to serious intestinal and systemic disease. PR39 could effectively inhibit the growth of Gram-negative bacteria, but there is little knowledge of its effects on intestinal barrier function and the microbiota in E. coli-challenged mice. In this study, an intestinal disease caused by EHEC O157:H7 was established, to analyze the effect of PR39 on EHEC O157:H7 induced intestinal epithelial barrier injury and disorder. Interestingly, PR39 attenuated EHEC O157:H7-induced systemic symptoms and significantly decreased mortality and the degree of E. coli shedding in faeces. Furthermore, the infiltration index of macrophages and neutrophils in intestine of the PR39 treatment group were obviously attenuated, along with the level of apoptosis. PR39 treatment group had distinctly improved tight junction associated proteins’ expression after EHEC O157:H7 caused injury. Additionally, the sequencing analysis of cecum microbiota showed that PR39 altered the abnormal increase in Bacteroides caused by EHEC O157:H7 and promoted the growth of probiotics such as Lactobacillus. In conclusion, cathelicidin-derived PR39 could effectively improve EHEC O157:H7-induced epithelial barrier injury, and dysfunction of immune and microbiota homeostasis in the intestinal tract, indicating that PR39 could be an excellent potential drug for zoonotic EHEC O157:H7-related intestinal disease.
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Affiliation(s)
- Zhang Haiwen
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China
| | - Hua Rui
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Zhang Bingxi
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Guan Qingfeng
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China
| | - Wang Beibei
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China.
| | - Zeng Jifeng
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China
| | - Wang Xuemei
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China
| | - Wu Kebang
- Tropical animal breeding and nutrition laboratory, Hainan University, Haikou, Hainan, 570228, People's Republic of China. .,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, Hainan, 570228, People's Republic of China.
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28
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Haiwen Z, Rui H, Bingxi Z, Qingfeng G, Jifeng Z, Xuemei W, Beibei W. Oral Administration of Bovine Lactoferrin-Derived Lactoferricin (Lfcin) B Could Attenuate Enterohemorrhagic Escherichia coli O157:H7 Induced Intestinal Disease through Improving Intestinal Barrier Function and Microbiota. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:3932-3945. [PMID: 30892034 DOI: 10.1021/acs.jafc.9b00861] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lactoferricin (Lfcin) B, derived from lactoferrin in whey, has attracted considerable attention because of its multiple biological functions. Zoonotic enterohemorrhagic Escherichia coli (EHEC) O157:H7 has adverse effects on intestinal epithelial barrier function, leading to serious intestinal disease. In this study, the EHEC O157:H7-induced intestinal dysfunction model was developed to investigate the effects of Lfcin B on EHEC O157:H7-induced epithelial barrier disruption and microbiota dysbiosis. Results showed that the inflammatory infiltration indexes in the jejunum of Lfcin B-treated animals were significantly decreased. Lfcin B administration also significantly improved ZO-1 and occludin expression following O157:H7-induced injury. Finally, microbiota analysis of the cecal samples revealed that Lfcin B inhibited the O157:H7-induced abnormal increase in Bacteroides. Therefore, Lfcin B efficiently attenuated O157:H7-induced epithelial barrier damage and dysregulation of inflammation status, while maintaining microbiota homeostasis in the intestine, indicating that it may be an excellent food source for prevention and therapy of EHEC O157:H7-related intestinal dysfunction.
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Affiliation(s)
- Zhang Haiwen
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
- Key Laboratory of Tropical Biological Resources of Ministry of Education , Haikou , Hainan 570228 , People's Republic of China
| | - Hua Rui
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
| | - Zhang Bingxi
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
| | - Guan Qingfeng
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
- Key Laboratory of Tropical Biological Resources of Ministry of Education , Haikou , Hainan 570228 , People's Republic of China
| | - Zeng Jifeng
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
- Key Laboratory of Tropical Biological Resources of Ministry of Education , Haikou , Hainan 570228 , People's Republic of China
| | - Wang Xuemei
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province , Hainan University , Haikou , Hainan 570228 , People's Republic of China
- Key Laboratory of Tropical Biological Resources of Ministry of Education , Haikou , Hainan 570228 , People's Republic of China
| | - Wang Beibei
- Key Laboratory of Tropical Biological Resources of Ministry of Education , Haikou , Hainan 570228 , People's Republic of China
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29
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Ma Y, Ding S, Liu G, Fang J, Yan W, Duraipandiyan V, Al-Dhabi NA, Esmail GA, Jiang H. Egg Protein Transferrin-Derived Peptides IRW and IQW Regulate Citrobacter rodentium-Induced, Inflammation-Related Microbial and Metabolomic Profiles. Front Microbiol 2019; 10:643. [PMID: 31001226 PMCID: PMC6456682 DOI: 10.3389/fmicb.2019.00643] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/14/2019] [Indexed: 12/22/2022] Open
Abstract
Bioactive peptides that target the gastrointestinal tract can strongly affect the health of animals and humans. This study aimed to evaluate the abilities of two peptides derived from egg albumin transferrin, IRW and IQW, to treat enteritis in a mouse model of Citrobacter rodentium-induced colitis by evaluating serum metabolomics and gut microbes. Forty-eight mice were randomly assigned to six groups: basal diet (CTRL), intragastric administration Citrobacter rodentium (CR), basal diet with 0.03%IRW (IRW), CR with 0.03% IRW (IRW+CR), basal diet with 0.03%IQW (IQW) and CR with 0.03% IQW (IQW+CR). CR administration began on day 10 and continued for 7 days. After 14 days of IRW and IQW treatment, serum was collected and subjected to a metabolomics analysis. The length and weight of each colon were measured, and the colon contents were collected for 16srRNA sequencing. The colons were significantly longer in the CR group, compared to the CTRL group. A serum metabolomics analysis revealed no significant difference in microbial diversity between the six groups. Compared with the CTRL group, the proportions of Firmicutes and Actinobacteria species decreased significantly and the proportions of Bacteroidetes and Proteobacteria species increased in the CR group. There were no significant differences between the CTRL and other groups. The serum metabolomics analysis revealed that Infected by CR increased the levels of oxalic acid, homogentisic acid and prostaglandin but decreased the levels of L-glutamine, L-acetyl carnitine, 1-methylhistidine and gentisic acid. Therefore, treatment with IRW and IQW was shown to regulate the intestinal microorganisms associated with colonic inflammation and serum metabolite levels, thus improving intestinal health.
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Affiliation(s)
- Yong Ma
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Sujuan Ding
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China.,Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Wenxin Yan
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Veeramuthu Duraipandiyan
- Department of Botany and Microbiology, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Galal Ali Esmail
- Department of Botany and Microbiology, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Hongmei Jiang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
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30
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Porcine lactoferrin-derived peptide LFP-20 modulates immune homoeostasis to defend lipopolysaccharide-triggered intestinal inflammation in mice. Br J Nutr 2019; 121:1255-1263. [DOI: 10.1017/s0007114519000485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AbstractThe performance of immune system is vital for defending the body from pathogens, and it plays a crucial role in health homoeostasis. In a previous study, we have shown that LFP-20, a twenty-amino acid antimicrobial peptide in the N terminus of porcine lactoferrin, modulated inflammatory response in colitis. Here, we further investigated the effects of LFP-20 on immune homoeostasis to elucidate the mechanism of its anti-inflammation action. A lipopolysaccharide (LPS)-triggered systemic inflammatory response mice model was established. On the basis of observed mucosal lesions and apoptosis in small intestine, we found increased macrophage and neutrophil infiltration in ileum after LPS stimulation. Expectedly, LFP-20 pre-treatment attenuated the LPS-mediated immune disorders in ileum. Moreover, the flow cytometry results indicated pre-treatment with LFP-20 sustained the balance of CD3+CD8+ T cells, B cells and natural killer cells in LPS-triggered immune disturbance. Simultaneously, we demonstrated LFP-20 modulated the secretion of both activated Th1-related IL-12p70, interferon-γ, TNF-α and Th2-related IL-4, IL-5 and IL-6. Furthermore, we found LFP-20 facilitated a balanced Th1 and Th2 response, which triggered cellular defence mechanisms and induced B cells to produce opsonising antibodies belonging to certain IgG subclasses to defend against LPS stimulation. Collectively, our study indicated pre-treatment with LFP-20 could defend against LPS-triggered systemic inflammatory response in mice via modulating immune homoeostasis.
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Shu G, Chen Y, Liu T, Ren S, Kong Y. Antimicrobial Peptide Cathelicidin-BF Inhibits Platelet Aggregation by Blocking Protease-Activated Receptor 4. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-018-9677-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Wang A, Zhang F, Guo Z, Chen Y, Zhang M, Yu H, Wang Y. Characterization of a Cathelicidin from the Colubrinae Snake, Sinonatrix annularis. Zoolog Sci 2019; 36:68-76. [DOI: 10.2108/zs180064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 08/14/2018] [Indexed: 11/17/2022]
Affiliation(s)
- Aili Wang
- Weifang University of Science and Technology, Shandong Peninsula Engineering Research Center of Comp
| | - Fen Zhang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzho
| | - Zhilai Guo
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzho
| | - Yan Chen
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzho
| | - Minghui Zhang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzho
| | - Haining Yu
- Department of Bioscience and Biotechnology, Dalian University of Technology, Dalian, Liaoning 116023
| | - Yipeng Wang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzho
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Cao G, Wang K, Li Z, Tao F, Xu Y, Lan J, Chen G, Yang C. Bacillus amyloliquefaciens Ameliorates Dextran Sulfate Sodium-Induced Colitis by Improving Gut Microbial Dysbiosis in Mice Model. Front Microbiol 2019; 9:3260. [PMID: 30671050 PMCID: PMC6331537 DOI: 10.3389/fmicb.2018.03260] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 12/14/2018] [Indexed: 12/31/2022] Open
Abstract
Several Bacillus strains exert beneficial effects on the maintenance of intestinal homeostasis and host health. However, whether Bacillus amyloliquefaciens (BA) can improve gut microbial dysbiosis and ameliorate colitis is unknown. Therefore, we conducted the present study to investigate the effects of BA administration on intestinal morphology, inflammatory response, and colonic microbial composition in a mouse model of dextran sulfate sodium (DSS)-induced colitis. Results showed that BA administration significantly ameliorated body weight loss, decreased disease activity index, and improved colonic tissue morphology in DSS-treated mice. In addition, levels of immunoglobulins, as well as pro-inflammatory cytokines, were decreased after BA administration. Importantly, colonic microbiota profiling indicated a significant (p < 0.05) difference in beta-diversity between BA-administrated and DSS-treated mice, according to weighted principal coordinate analysis (PCoA) results. The relative abundance of the Firmicutes genus was increased, whereas that of Bacteroidetes was decreased by BA administration. Furthermore, phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) analysis showed that the most significantly changed pathways between the four groups of mice were carbohydrate, lipid, and amino acid metabolism. In conclusion, our results showed that BA administration has beneficial effects on DSS-induced colitis, suggesting that this strategy might be useful for the treatment of dysbiosis during ulcerative colitis. Further, the changes in metabolism, especially amino acid metabolism, might contribute to the beneficial effects of BA on the amelioration of DSS-induced colitis.
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Affiliation(s)
- Guangtian Cao
- College of Standardization, China Jiliang University, Hangzhou, China
| | - Kangli Wang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
| | - Zhanming Li
- Department of Food Science, China Jiliang University, Hangzhou, China
| | - Fei Tao
- College of Standardization, China Jiliang University, Hangzhou, China
| | - Yinglei Xu
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
| | - Junhong Lan
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
| | - Guangyong Chen
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
| | - Caimei Yang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
- Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology, Zhejiang A and F University, Hangzhou, China
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Zhang H, Hua R, Zhang B, Zhang X, Yang H, Zhou X. Serine Alleviates Dextran Sulfate Sodium-Induced Colitis and Regulates the Gut Microbiota in Mice. Front Microbiol 2018; 9:3062. [PMID: 30619148 PMCID: PMC6295577 DOI: 10.3389/fmicb.2018.03062] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 11/27/2018] [Indexed: 01/01/2023] Open
Abstract
Serine alleviates inflammatory responses and is beneficial for gut health; however, whether it exerts any effects on ulcerative colitis or regulates intestinal microbiota remains unknown. We investigated the effects of serine supplementation on colonic morphology, inflammation, and microbiota composition in dextran sulfate sodium (DSS)-induced colitis model in mice. Acute colitis was induced through the oral intake of 3.5% DSS in water for 7 days. Mice with acute colitis were divided into two groups; The DSS and Ser-treated groups were rectally administrated with PBS or 1% (w/v) serine (40 mg/kg body weight) for 7 days. The results showed that serine decreased the disease activity index, as well as myeloperoxidase, eosinophil peroxidase, and proinflammatory cytokine concentrations in colonic tissue, while serine improved colonic morphology and inhibited cell apoptosis in colitis mice. In addition, 16S rRNA phylogenetic sequencing revealed a shift in bacterial community composition, and changes in microbiota functional profiles following serine supplementation, although no significant difference in α-diversity analysis was observed. The effects of serine supplementation helped on the recovery of major perturbations to macrobiotic functions, such as amino acids metabolism; tissue replication and repair; and cell growth and death. Serine might have great potential for the renewal of colonic tissue in DSS-induced colitis.
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Affiliation(s)
- Haiwen Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Rui Hua
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Bingxi Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Xiaomeng Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Hui Yang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Xihong Zhou
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
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35
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Wu W, Wang S, Liu Q, Wang X, Shan T, Wang Y. Cathelicidin-WA attenuates LPS-induced inflammation and redox imbalance through activation of AMPK signaling. Free Radic Biol Med 2018; 129:338-353. [PMID: 30273672 DOI: 10.1016/j.freeradbiomed.2018.09.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/21/2018] [Accepted: 09/28/2018] [Indexed: 01/09/2023]
Abstract
Dysregulated activation of inflammation is associated with the development and progression of many diseases. Generation of reactive oxygen species (ROS) has been shown to promote an inflammatory response. Cathelicidin peptides not only defend against the invasion of various microbes but also play an important role in regulating immune responses. The objective of this study was to investigate the effects and mechanisms of Cathelicidin-WA (CWA) on the inflammatory response and oxidative stress in macrophages. Our results showed that CWA efficiently attenuated lipopolysaccharide (LPS)-stimulated inflammation and oxidative stress both in vivo and in vitro. Mechanistically, we found that CWA significantly reduced the LPS-induced nuclear translocation of NF-κB, thus decreasing the production of the pro-inflammatory cytokines TNF-α and IL-6 in macrophages. On the other hand, CWA markedly promoted the nuclear translocation of Nrf2 via the AKT pathway and p38 signaling. This resulted in increased expression of the anti-oxidative genes NQO-1 and HO-1 and alleviated oxidative stress in LPS-stimulated macrophages. Interestingly, the effects of CWA were diminished when AMPK was knocked down. Consistently, we noticed that CWA failed to ameliorate the LPS-induced inflammatory response and oxidative stress in AMPK knockout mice. Furthermore, we discovered that LKB1 was essential for AMPK activation by CWA. These data demonstrated for the first time that CWA attenuated LPS-stimulated inflammation and redox imbalance through regulating LKB1-AMPK signaling. Such knowledge provides new insights into the mechanisms through which Cathelicidin peptides modulate immune responses.
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Affiliation(s)
- Weiche Wu
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China
| | - Sisi Wang
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China
| | - Qing Liu
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China
| | - Xinxia Wang
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China
| | - Tizhong Shan
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China.
| | - Yizhen Wang
- College of Animal Science, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Zhejiang Provincial Laboratory of Feed and Animal Nutrition, No. 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, PR China.
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36
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Purification and identification of intestinal mucosal cell proliferation-promoting peptides from Crassostrea hongkongensis. Eur Food Res Technol 2018. [DOI: 10.1007/s00217-018-3186-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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37
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Yu H, Shang L, Zeng X, Li N, Liu H, Cai S, Huang S, Wang G, Wang Y, Song Q, Qiao S. Risks Related to High-Dosage Recombinant Antimicrobial Peptide Microcin J25 in Mice Model: Intestinal Microbiota, Intestinal Barrier Function, and Immune Regulation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11301-11310. [PMID: 30298738 DOI: 10.1021/acs.jafc.8b03405] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Antimicrobial peptide (AMP) can be a promising alternative in various domains. However, further risk information is required. In this study, mice were orally administrated different dosages of recombinant AMP microcin J25 (4.55, 9.1, and 18.2 mg/kg; MccJ25) for 1 week, and the toxicity risk impacts were examined. We evidenced that middle-dosage administration mice had a lower inflammation, better body weight, and ameliorated mucosal morphology, accompanied by reduced intestinal permeability and tighter intestinal barrier. Fecal microbiota composition analysis in middle- or low-dosage mice revealed the Bifidobacterium count was increased and the coliform bacteria count was decreased, and increased in short-chain fatty acid levels. Unexpectedly, there was a risk that high-dosage mice increased intestinal permeability and imbalance of intestinal bacteria. Taken together, these data indicated a safe threshold for usage of MccJ25 in clinical practice. Such studies can effectively enhance the safety of various aspects such as food preservative and drug.
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Affiliation(s)
- Haitao Yu
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Lijun Shang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Xiangfang Zeng
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Ning Li
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Hongbin Liu
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Shuang Cai
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Shuo Huang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Gang Wang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Yuming Wang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
| | - Qinglong Song
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
- Beijing Longkefangzhou Bio-Engineering Technology Co., Ltd. , Beijing 100193 , People's Republic of China
| | - Shiyan Qiao
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre , China Agricultural University , Beijing 100193 , People's Republic of China
- Beijing Bio-feed Additives Key Laboratory , Beijing 100193 , People's Republic of China
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38
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Jiang F, Guo AP, Xu JC, You QD, Xu XL. Discovery of a Potent Grp94 Selective Inhibitor with Anti-Inflammatory Efficacy in a Mouse Model of Ulcerative Colitis. J Med Chem 2018; 61:9513-9533. [PMID: 30351001 DOI: 10.1021/acs.jmedchem.8b00800] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As the endoplasmic reticulum paralogue of Hsp90, Grp94 chaperones a small set of client proteins associated with some diseases, including cancer, primary open-angle glaucoma, and inflammatory disorders. Grp94-selective inhibition has been a potential therapeutic strategy for these diseases. In this study, inspired by the conclusion that ligand-induced "Phe199 shift" effect is the structural basis of Grp94-selective inhibition, a series of novel Grp94 selective inhibitors incorporating "benzamide" moiety were developed, among which compound 54 manifested the most potent Grp94 inhibitory activity with an IC50 value of 2 nM and over 1000-fold selectivity to Grp94 against Hsp90α. In a DSS-induced mouse model of ulcerative colitis (UC), compound 54 exhibited significant anti-inflammatory efficacy. This work provides a potent Grp94 selective inhibitor as probe compound for the biological study of Grp94 and represents the first study that confirms the potential therapeutic efficacy of Grp94-selective inhibitors against UC.
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Affiliation(s)
- Fen Jiang
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - An-Ping Guo
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Jia-Chen Xu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Qi-Dong You
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Xiao-Li Xu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
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39
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Liu C, Qi J, Shan B, Gao R, Gao F, Xie H, Yuan M, Liu H, Jin S, Wu F, Ma Y. Pretreatment with cathelicidin-BF ameliorates Pseudomonas aeruginosa pneumonia in mice by enhancing NETosis and the autophagy of recruited neutrophils and macrophages. Int Immunopharmacol 2018; 65:382-391. [PMID: 30380513 DOI: 10.1016/j.intimp.2018.10.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/19/2018] [Accepted: 10/19/2018] [Indexed: 12/23/2022]
Abstract
Although the antimicrobial peptide cathelicidin-BF shows minimal cytotoxicity in mammalian cells and has excellent direct killing effects on multidrug-resistant clinical pathogens such as Pseudomonas aeruginosa, its clinical application is precluded by its high sensitivity to serum proteases. Here, we demonstrate that intravenous administration of cathelicidin-BF after P. aeruginosa infection did not increase the survival rate of mice with acute pneumonia but that pretreatment with cathelicidin-BF ameliorated pneumonia by effectively activating innate immunity. Enhanced neutrophil extracellular trap (NET) activation and release (NETosis) are key processes for capturing and killing bacteria, concomitantly enhanced macrophage clearance activity, including phagocytosis and autophagy, may eliminate NETs early enough to prevent severe tissue damage. Our study not only suggests a possible approach for applying cathelicidin-BF in vivo but also provides a possible defense strategy against multidrug-resistant pathogens, i.e., efficiently activation of innate immunity.
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Affiliation(s)
- Cunbao Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Jialong Qi
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Bin Shan
- Department of Clinical Lab, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Ruiyu Gao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Fulan Gao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Hanghang Xie
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Mingcui Yuan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Hongxian Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Shumei Jin
- Yunnan Institute of Materia Medica, Kunming, China
| | - Fei Wu
- Department of Occupational Disease, The Third People's Hospital of Yunnan Province, Kunming, China
| | - Yanbing Ma
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.
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40
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Yu H, Ding X, Shang L, Zeng X, Liu H, Li N, Huang S, Wang Y, Wang G, Cai S, Chen M, Levesque CL, Johnston LJ, Qiao S. Protective Ability of Biogenic Antimicrobial Peptide Microcin J25 Against Enterotoxigenic Escherichia Coli-Induced Intestinal Epithelial Dysfunction and Inflammatory Responses IPEC-J2 Cells. Front Cell Infect Microbiol 2018; 8:242. [PMID: 30057893 PMCID: PMC6053529 DOI: 10.3389/fcimb.2018.00242] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 06/22/2018] [Indexed: 12/28/2022] Open
Abstract
Poison of intestinal induce severe health problems in human infants and young animals due to contaminating foods and feedstuffs. With the emergence of public health concerns and high-speed diffuse of drug-opposition of bacteria, the adoption of antimicrobial peptides as potential candidates in treating pathogen infections raised up. Nature Microcin J25 (MccJ25), a class of lasso peptides separated from a fecal strain of E. coli, has been replied to display powerful antimicrobial behavior. Herein, the study was to assess the usefulness of biogenic MccJ25 in the prophylaxis of ETEC K88 infection in IPEC-J2 cells. In vitro antimicrobial activity against ETEC K88 and cytotoxicity of biogenic MccJ25 were determined first. To further understand how biogenic MccJ25 mediates its impact, ETEC K88 adhesion in cells, membrane permeability [as indicated by reduced release of lactate dehydrogenase (LDH)], transepithelial electrical resistance (TEER), barrier function, and proinflammatory cytokines levels were determined in IPEC-J2 cells after treatment with biogenic MccJ25 and challenge with ETEC K88. Biogenic MccJ25 had a minimum inhibitory concentration of 0.25 μg/mL against ETEC K88, decreased ETEC K88 adhesion in cells and did not cause cytotoxicity toward cells. Furthermore, biogenic MccJ25 protects against ETEC-induced barrier dysfunction by increasing the TEER, decreasing the LDH and promoting tight junction proteins (TJPs) by promoting the assembly of occludin and claudin-1 in the tight junction complex. Biogenic MccJ25 was further found to relieve inflammation responses through modulation of interleukine-6, IL-8 and tumor necrosis factor-α levels via inhibition of mitogen-activated protein kinase (MAPK) and nuclear factor κB activation. In summary, biogenic MccJ25 can protects against ETEC K88-induced intestinal damage and inflammatory response, recommend the hidden adoption of biogenic MccJ25 as a novel prophylactic agent to reduce pathogen infection in animals, food or humans.
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Affiliation(s)
- Haitao Yu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiuliang Ding
- National Feed Engineering Technology Research Center, Beijing, China
| | - Lijun Shang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiangfang Zeng
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Hongbin Liu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Ning Li
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shuo Huang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Yuming Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Gang Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shuang Cai
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Meixia Chen
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Crystal L Levesque
- Department of Animal Sciences, South Dakota State University, Brookings, SD, United States
| | - Lee J Johnston
- Swine Nutrition and Production, West Central Research and Outreach Center, University of Minnesota, Morris, MN, United States
| | - Shiyan Qiao
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
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41
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Zhai Z, Ni X, Jin C, Ren W, Li J, Deng J, Deng B, Yin Y. Cecropin A Modulates Tight Junction-Related Protein Expression and Enhances the Barrier Function of Porcine Intestinal Epithelial Cells by Suppressing the MEK/ERK Pathway. Int J Mol Sci 2018; 19:ijms19071941. [PMID: 30004434 PMCID: PMC6073479 DOI: 10.3390/ijms19071941] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/26/2018] [Accepted: 06/29/2018] [Indexed: 12/15/2022] Open
Abstract
Inflammatory bowel disease (IBD) in humans and animals is associated with bacterial infection and intestinal barrier dysfunction. Cecropin A, an antimicrobial peptide, has antibacterial activity against pathogenic bacteria. However, the effect of cecropin A on intestinal barrier function and its related mechanisms is still unclear. Here, we used porcine jejunum epithelial cells (IPEC-J2) as a model to investigate the effect and mechanism of cecropin A on intestinal barrier function. We found that cecropin A reduced Escherichia coli (E. coli) adherence to IPEC-J2 cells and downregulated mRNA expression of tumor necrosis factor α (TNF-α), interleukin-6 (IL-6), and interleukin-8 (IL-8). Furthermore, cecropin A elevated the transepithelial electrical resistance (TER) value while reducing the paracellular permeability of the IPEC-J2 cell monolayer barrier. Finally, by using Western blotting, immunofluorescence and pathway-specific antagonists, we demonstrated that cecropin A increased ZO-1, claudin-1 and occludin protein expression and regulated membrane distribution and F-actin polymerization by increasing CDX2 expression. We conclude that cecropin A enhances porcine intestinal epithelial cell barrier function by downregulating the mitogen-activated protein kinase (MEK)/extracellular signal-regulated kinase (ERK) pathway. We suggest that cecropin A has the potential to replace antibiotics in the treatment of IBD due to its antibacterial activity on gram-negative bacteria and its enhancement effect on intestinal barrier function.
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Affiliation(s)
- Zhenya Zhai
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Xiaojun Ni
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Chenglong Jin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Wenkai Ren
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Jie Li
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Jinping Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Baichuan Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
| | - Yulong Yin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, Hunan, China.
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Wang J, Lu J, Xie X, Xiong J, Huang N, Wei H, Jiang S, Peng J. Blend of organic acids and medium chain fatty acids prevents the inflammatory response and intestinal barrier dysfunction in mice challenged with enterohemorrhagic Escherichia coli O157:H7. Int Immunopharmacol 2018; 58:64-71. [PMID: 29555328 DOI: 10.1016/j.intimp.2018.03.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/27/2018] [Accepted: 03/14/2018] [Indexed: 02/07/2023]
Abstract
Impaired epithelial barrier function disrupts immune homeostasis and increases inflammation in intestines, leading to many intestinal diseases. The blend of organic acids (OAs) and medium chain fatty acids (MCFAs) has been shown to have synergistic bactericidal effect. In this study, we demonstrated that two blends of OAs and MCFAs (OM1 and OM2) could prevent the inflammatory response and intestinal barrier dysfunction in enterohemorrhagic Escherichia coli (EHEC)-infected mice. Treatments of OM1 and OM2 significantly reduced the body weight loss and production of IL-6 and TNF-α induced by EHEC. Mice treated with OM1 and OM2 showed decrease in serum D-lactic concentration, DAO activity and bacterial transfer to liver and spleen. Furthermore, OM1 and OM2 increased the expression of tight junction proteins occludin and ZO-1, mucus protein MUC-2, and host defense peptides mBD1, mBD2 and mBD3. Finally, OM1 and OM2 increased the population of Lactobacillus spp. and Bifidobacterium spp., but decreased that of E. coli in the cecum. These findings indicate that OM1 and OM2 may be used to develop a prophylactic agent for intestinal inflammation and injury in enteric pathogen infection.
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Affiliation(s)
- Jun Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - JinXin Lu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - XiaoWei Xie
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jia Xiong
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ningning Huang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hongkui Wei
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Siwen Jiang
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China; Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jian Peng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.
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Li Y, Chu X, Liu C, Huang W, Yao Y, Xia Y, Sun P, Long Q, Feng X, Li K, Yang X, Bai H, Sun W, Ma Y. Exogenous murine antimicrobial peptide CRAMP significantly exacerbates Ovalbumin-induced airway inflammation but ameliorates oxazolone-induced intestinal colitis in BALB/c mice. Hum Vaccin Immunother 2017; 14:146-158. [PMID: 29049008 DOI: 10.1080/21645515.2017.1386823] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Cathelicidin has been reported to be multifunctional. The current study aimed to investigate the influences of exogenous cathelicidin-related antimicrobial peptide (CRAMP) on inflammatory responses in different disease models. In OVA-induced allergic airway inflammation, CRAMP significantly enhanced the infiltration of inflammatory cells and accumulation of proinflammatory Th2 cytokine IL-13 and IL-33 in bronchial alveolar lavage fluid (BALF), exacerbated lung tissue inflammation and airway goblet cell hyperplasia, and elevated OVA-specific IgE level in serum. In oxazolone-induced intestinal colitis, the expression levels of CRAMP and its receptor FPR2 significantly increased in comparison with those of TNBS-induced mice, vesicle and normal controls. Exogenous CRAMP significantly prevented the development of ulcerative colitis, evidenced by improved body weight regain, decreased colons weight/length ratio, elevated epithelial integrity, and ameliorated colon tissue inflammation. In addition, pro-inflammatory cytokines TNF-α, IL-1β, IL-4 and IL-13, as well as chemokines CXCL2 and CXCL5 for neutrophils recruitment were significantly decreased in CRAMP-treated mice, and epithelial repair-related factors MUC2 and Claudin1 were increased, determined by real time-PCR and ELISAs. The results indicated that although CRAMP has pro-inflammatory effects in airway, local application of exogenous CRAMP might be a potential approach for the treatment of ulcerative colitis.
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Affiliation(s)
- Yang Li
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Xiaojie Chu
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Cunbao Liu
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Weiwei Huang
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Yufeng Yao
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Ye Xia
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Pengyan Sun
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Qiong Long
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Xuejun Feng
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Kui Li
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Xu Yang
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Hongmei Bai
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Wenjia Sun
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
| | - Yanbing Ma
- a Laboratory of Molecular Immunology , Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College , Kunming , China.,b Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases , Kunming , China.,c Yunnan Engineering Research Center of Vaccine Research and Development on Severe Infectious Diseases , Kunming , China
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Zhang H, Zhang B, Zhang X, Wang X, Wu K, Guan Q. Effects of cathelicidin-derived peptide from reptiles on lipopolysaccharide-induced intestinal inflammation in weaned piglets. Vet Immunol Immunopathol 2017; 192:41-53. [PMID: 29042014 DOI: 10.1016/j.vetimm.2017.09.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 09/16/2017] [Accepted: 09/20/2017] [Indexed: 12/15/2022]
Abstract
Cathelicidins are the largest family of antimicrobial peptides. C-BF, which is short for Cathelicidin-Bungarus Fasciatus, was isolated from snake venom. C-BF was found to be the most potential substitutes for antibiotics. In this study, we analyzed the effects of cathelicidin-derived peptide C-BF, on lipopolysaccharide (LPS)-induced intestinal damage in weaned piglets, to evaluate the therapeutic effect of C-BF on infectious disease of piglets. Twenty-four piglets were randomly assigned into four groups: control, C-BF, LPS, and C-BF+LPS. The LPS and C-BF+LPS groups were intraperitoneally injected with LPS at fixed timepoints, while the control and C-BF groups were injected with equal volumes of saline. The C-BF and C-BF+LPS groups were then intraperitoneally injected with antimicrobial peptide C-BF, while the control and LPS groups were injected with equal volumes of saline. All piglets were observed for 15days and then sacrificed for analysis. The results showed that C-BF significantly improved the growth performance of weaned piglets compared with LPS-treated animals (P<0.05), and that C-BF could ameliorate the structural and developmental damage to the small intestine caused by LPS treatment. Further, the level of apoptosis in the LPS group was significantly higher than in the other three groups (P<0.05), as was the invasion of inflammatory cells into the intestinal mucosa of the jejunum (P<0.05), leading to increased secretion of pro-inflammatory cytokines. In conclusion, the study indicates that C-BF treatment may be a potential therapy for LPS/pathogen-induced intestinal injury in piglets.
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Affiliation(s)
- Haiwen Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China; Laboratory of Tropical Animal Breeding, Reproduction and Nutrition, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
| | - Bingxi Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
| | - Xiaomeng Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
| | - Xuemei Wang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China; Laboratory of Tropical Animal Breeding, Reproduction and Nutrition, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
| | - Kebang Wu
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China; Laboratory of Tropical Animal Breeding, Reproduction and Nutrition, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
| | - Qingfeng Guan
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, Hainan, 570228, People's Republic of China; Laboratory of Tropical Animal Breeding, Reproduction and Nutrition, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
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Perumal Samy R, Stiles BG, Franco OL, Sethi G, Lim LH. Animal venoms as antimicrobial agents. Biochem Pharmacol 2017; 134:127-138. [DOI: 10.1016/j.bcp.2017.03.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 03/07/2017] [Indexed: 12/21/2022]
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Song D, Cheng Y, Li X, Wang F, Lu Z, Xiao X, Wang Y. Biogenic Nanoselenium Particles Effectively Attenuate Oxidative Stress-Induced Intestinal Epithelial Barrier Injury by Activating the Nrf2 Antioxidant Pathway. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14724-14740. [PMID: 28406025 DOI: 10.1021/acsami.7b03377] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In the present study, a new form of selenium nanoparticle (biogenic nanoselenium (BNS) particles) was synthesized using bacteria. The protection of BNS particles against oxidative stress-induced intestinal barrier dysfunction and the inherent mechanisms of this process were investigated, and selenomethionine (SeMet) and chemically synthesized nanoselenium (Nano-Se) particles were used for comparison. Characterization of BNS particles revealed that they were monodispersed and homogeneous spheres, with an average size of 139.43 ± 7.44 nm. In the mouse model of intestinal oxidative stress, BNS particles were found to protect the mouse intestinal barrier function and preserve intestinal redox homeostasis more efficiently than SeMet and Nano-Se. In vitro experiments with porcine jejunum epithelial (IPEC-J2) cells verified the stronger epithelial barrier-protecting effect of BNS particles against oxidative stress, with reduced cell apoptosis and an improved cell redox state. BNS activated the nuclear factor (erythroid-derived-2)-like 2 (Nrf2) and increased the expression of its downstream genes, including thioredoxin reductase (TXNRD)-1, NADPH dehydrogenase (NQO)-1, heme oxygenase (HO)-1, and thioredoxin (Trx), in dose- and time-dependent manners. In contrast, SeMet and Nano-Se merely enhanced the activity of the selenoenzymes TXNRD-1 and glutathione peroxidase (GPx)-1, indicating the role of selenium donors. Moreover, the knock down of Nrf2 significantly blocked the antioxidative effect of BNS, confirming that BNS protects the intestinal barrier from oxidative stress-induced damage by activating Nrf2 and its downstream genes. Our results suggest that BNS is a promising selenium species with potential application in treating oxidative stress-related intestinal diseases.
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Affiliation(s)
- Deguang Song
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Yuanzhi Cheng
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Xiaoxiao Li
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Fengqin Wang
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Zeqing Lu
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Xiao Xiao
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
| | - Yizhen Wang
- National Engineering Laboratory of Biological Feed Safety and Pollution Prevention and Control, Key laboratory of Molecular Animal Nutrition, Ministry of Education, Institute of Feed Science, Zhejiang University , 866 Yuhang Tang Road, Hangzhou 310058, China
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Yi H, Hu W, Chen S, Lu Z, Wang Y. Cathelicidin-WA Improves Intestinal Epithelial Barrier Function and Enhances Host Defense against Enterohemorrhagic Escherichia coli O157:H7 Infection. THE JOURNAL OF IMMUNOLOGY 2017; 198:1696-1705. [PMID: 28062699 DOI: 10.4049/jimmunol.1601221] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 12/06/2016] [Indexed: 01/28/2023]
Abstract
Impaired epithelial barrier function disrupts immune homeostasis and increases inflammation in intestines, leading to many intestinal diseases. Cathelicidin peptides suppress intestinal inflammation and improve intestinal epithelial barrier function independently of their antimicrobial activity. In this study, we investigated the effects of Cathelicidin-WA (CWA) on intestinal epithelial barrier function, as well as the underlying mechanism, by using enterohemorrhagic Escherichia coli (EHEC)-infected mice and intestinal epithelial cells. The results showed that CWA attenuated EHEC-induced clinical symptoms and intestinal colitis, as did enrofloxacin (Enro). CWA decreased IL-6 production in the serum, jejunum, and colon of EHEC-infected mice. Additionally, CWA alleviated the EHEC-induced disruption of mucin-2 and goblet cells in the intestine. Interestingly, CWA increased the mucus layer thickness, which was associated with increasing expression of trefoil factor 3, in the jejunum of EHEC-infected mice. CWA increased the expression of tight junction proteins in the jejunum of EHEC-infected mice. Using intestinal epithelial cells and a Rac1 inhibitor in vitro, we demonstrated that the CWA-mediated increases in the tight junction proteins might depend on the Rac1 pathway. Furthermore, CWA improved the microbiota and short-chain fatty acid concentrations in the cecum of EHEC-infected mice. Although Enro and CWA had similar effects on intestinal inflammation, CWA was superior to Enro with regard to improving intestinal epithelial barrier and microbiota in the intestine. In conclusion, CWA attenuated EHEC-induced inflammation, intestinal epithelial barrier damage, and microbiota disruption in the intestine of mice, suggesting that CWA may be an effective therapy for many intestinal diseases.
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Affiliation(s)
- Hongbo Yi
- Institute of Feed Science, College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; and.,Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong 510640, China
| | - Wangyang Hu
- Institute of Feed Science, College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; and
| | - Shan Chen
- Institute of Feed Science, College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; and
| | - Zeqing Lu
- Institute of Feed Science, College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; and
| | - Yizhen Wang
- Institute of Feed Science, College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; and
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Abstract
Human cathelicidin LL-37, the only member of the cathelicidin family of host defense peptides expressed in humans, plays a crucial role in host defense against pathogen invasion, as well as in regulating the functions of anti-inflammation, antitumorigenesis, and tissue repair. It is primarily produced by phagocytic leukocytes and epithelial cells, and mediates a wide range of biological responses. Emerging evidence from several studies indicates that LL-37 plays a prominent and complex role in inflammatory bowel disease (IBD). Although overexpression of LL-37 has been implicated in the inflamed and noninflamed colon mucosa in patients with ulcerative colitis, LL-37 expression was not changed in the inflamed or noninflamed colon or ileal mucosa in patients with Crohn's disease. Furthermore, studies in animal models and human patients further characterized the protective effect of cathelicidins both in ulcerative colitis and Crohn's disease. These data suggest the intricate functions of LL-37 in IBD. They will also create many strategies and opportunities for therapeutic intervention in IBD in the future. This review aims to elucidate the structure and bioactivity of LL-37 and also discuss the recent progress in understanding the relationship between LL-37 and IBD.
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Yi H, Zhang L, Gan Z, Xiong H, Yu C, Du H, Wang Y. High therapeutic efficacy of Cathelicidin-WA against postweaning diarrhea via inhibiting inflammation and enhancing epithelial barrier in the intestine. Sci Rep 2016; 6:25679. [PMID: 27181680 PMCID: PMC4867772 DOI: 10.1038/srep25679] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/20/2016] [Indexed: 12/12/2022] Open
Abstract
Diarrhea is a leading cause of death among young mammals, especially during weaning. Here, we investigated the effects of Cathelicidin-WA (CWA) on diarrhea, intestinal morphology, inflammatory responses, epithelial barrier and microbiota in the intestine of young mammals during weaning. Piglets with clinical diarrhea were selected and treated with saline (control), CWA or enrofloxacin (Enro) for 4 days. Both CWA and Enro effectively attenuated diarrhea. Compared with the control, CWA decreased IL-6, IL-8 and IL-22 levels and reduced neutrophil infiltration into the jejunum. CWA inhibited inflammation by down-regulating the TLR4-, MyD88- and NF-κB-dependent pathways. Additionally, CWA improved intestinal morphology by increasing villus and microvillus heights and enhancing intestinal barrier function by increasing tight junction (TJ) protein expression and augmenting wound-healing ability in intestinal epithelial cells. CWA also improved microbiota composition and increased short-chain fatty acid (SCFA) levels in feces. By contrast, Enro not only disrupted the intestinal barrier but also negatively affected microbiota composition and SCFA levels in the intestine. In conclusion, CWA effectively attenuated inflammation, enhanced intestinal barrier function, and improved microbiota composition in the intestines of weaned piglets. These results suggest that CWA could be an effective and safe therapy for diarrhea or other intestinal diseases in young mammals.
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Affiliation(s)
- Hongbo Yi
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Lin Zhang
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Zhenshun Gan
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Haitao Xiong
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Caihua Yu
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Huahua Du
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Yizhen Wang
- Institute of Feed Science, College of Animal Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
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50
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Yi H, Jiang D, Zhang L, Xiong H, Han F, Wang Y. Developmental expression of STATs, nuclear factor-κB and inflammatory genes in the jejunum of piglets during weaning. Int Immunopharmacol 2016; 36:199-204. [PMID: 27160867 DOI: 10.1016/j.intimp.2016.04.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 04/15/2016] [Accepted: 04/20/2016] [Indexed: 01/05/2023]
Abstract
The signal transducer and activator of transcription (STAT) proteins play essential roles in apoptosis, proliferation and survival. However, the role of STATs in intestinal inflammation during weaning is unclear. This study aimed to investigate developmental expression of STATs, nuclear factor-κB (NF-κB) and inflammatory genes in the jejunum of piglets during weaning. Thirty-two piglets were weaned at 21d and sacrificed at 0, 1, 7, or 14d (n=8) after weaning. Villus height and the villus height/crypt depth ratio were decreased, whereas crypt depth was increased in the jejunum at 7 and 14d after weaning. In addition, the mRNA levels of interferon-γ (IFN-γ), inducible nitric oxide synthase (iNOS), IL-6, IL-8, IL-12 and IL-22 were increased in the jejunum at 7 and 14d after weaning, whereas transforming growth factor-β (TGF-β), suppressor of cytokine signaling 3 (SCOS3) and arginase-1 was decreased. Neutrophil infiltration was increased in the mucosa of the jejunum after weaning. Moreover, phosphorylation of IκB-α, NF-κB, AKT and STAT-3 was increased. However, the phosphorylation of STAT-1 (at 7 and 14d) and STAT-6 (at 1 and 7d) was suppressed in the jejunum after weaning. Treatment of porcine jejunal epithelial (IPEC-J2) cells with the STAT inhibitors fludarabine, niclosamide and teriflunomide, which inhibit the phosphorylation of STAT-1, STAT-3 and STAT-6, respectively, weakened the defense capacity of these cells against bacterial infection. In conclusion, weaning caused severe inflammation associated with activation of the NF-κB and STAT-3 pathways and suppression of STAT-1 and STAT-6 in the jejunum of piglets.
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Affiliation(s)
- Hongbo Yi
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China
| | - Denghu Jiang
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China
| | - Lin Zhang
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China
| | - Haitao Xiong
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China
| | - Feifei Han
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China
| | - Yizhen Wang
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province 310058, China.
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