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Liu ZY, Yang HL, Wei CY, Cai GH, Ye JD, Zhang CX, Sun YZ. Commensal Bacillus siamensis LF4 induces antimicrobial peptides expression via TLRs and NLRs signaling pathways in intestinal epithelial cells of Lateolabrax maculatus. FISH & SHELLFISH IMMUNOLOGY 2023; 134:108634. [PMID: 36828198 DOI: 10.1016/j.fsi.2023.108634] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Antimicrobial peptides (AMPs) play an important role in modulating intestinal microbiota, and our previous study showed that autochthonous Baccilus siamensis LF4 could shape the intestinal microbiota of spotted seabass (Lateolabrax maculatus). In the present study, a spotted seabass intestinal epithelial cells (IECs) model was used to investigate whether autochthonous B. siamensis LF4 could modulate the expression of AMPs in IECs. And then, the IECs were treated with active, heat-inactivated LF4 and its supernatant to illustrate their AMPs inducing effects and the possible signal transduction mechanisms. The results showed that after 3 h of incubation with 108 CFU/mL B. siamensis LF4, lactate dehydrogenase (LDH), glutamic oxaloacetic transaminase (GOT), glutamic propylic transaminase (GPT) activities in supernatant decreased significantly and obtained minimum values, while supernatant alkaline phosphatase (AKP) activity, β-defensin protein level and IECs Na+/K+-ATPase activity, AMPs (β-defensin, hepcidin-1, NK-lysin, piscidin-5) genes expression increased significantly and obtained maximum values (P < 0.05). Further study demonstrated that the active, heat-inactivated LF4 and its supernatant treatments could effectively decrease the LDH, GOT, and GPT activities in IECs supernatant, increase AKP activity and β-defensin (except LF4 supernatant treatment) protein level in IECs supernatant and Na+/K+-ATPase and AMPs genes expression in IECs. Treatment with active and heat-inactivated B. siamensis LF4 resulted in significantly up-regulated the expressions of TLR1, TLR2, TLR3, TLR5, NOD1, NOD2, TIRAP, MyD88, IRAK1, IRAK4, TRAF6, TAB1, TAB2, ERK, JNK, p38, AP-1, IKKα, IKKβ and NF-κB genes. Treatment with B. siamensis LF4 supernatant also resulted in up-regulated these genes, but not the genes (ERK, JNK, p38, and AP-1) in MAPKs pathway. In summary, active, heat-inactivated and supernatant of B. siamensis LF4 can efficiently induce AMPs expression through activating the TLRs/NLRs-MyD88-dependent signaling, active and heat-inactivated LF4 activated both the downstream MAPKs and NF-κB pathways, while LF4 supernatant only activated NF-κB pathway.
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Affiliation(s)
- Zi-Yan Liu
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Hong-Ling Yang
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China; Xiamen Key Laboratory for Feed Quality Testing and Safety Evaluation, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Cheng-Ye Wei
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Guo-He Cai
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China; Xiamen Key Laboratory for Feed Quality Testing and Safety Evaluation, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Ji-Dan Ye
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China; Xiamen Key Laboratory for Feed Quality Testing and Safety Evaluation, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Chun-Xiao Zhang
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China; Xiamen Key Laboratory for Feed Quality Testing and Safety Evaluation, Fisheries College, Jimei University, Xiamen, 361021, China
| | - Yun-Zhang Sun
- The Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, China; Xiamen Key Laboratory for Feed Quality Testing and Safety Evaluation, Fisheries College, Jimei University, Xiamen, 361021, China; Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Xiamen, 361021, China.
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Lee CW, Lin ZC, Chiang YC, Li SY, Ciou JJ, Liu KW, Lin YC, Huang BJ, Peng KT, Fang ML, Lin TE, Liao MY, Lai CH. AuAg nanocomposites suppress biofilm-induced inflammation in human osteoblasts. NANOTECHNOLOGY 2023; 34:165101. [PMID: 36657162 DOI: 10.1088/1361-6528/acb4a1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 01/19/2023] [Indexed: 06/17/2023]
Abstract
Staphylococcus aureus (S. aureus)forms biofilm that causes periprosthetic joint infections and osteomyelitis (OM) which are the intractable health problems in clinics. The silver-containing nanoparticles (AgNPs) are antibacterial nanomaterials with less cytotoxicity than the classic Ag compounds. Likewise, gold nanoparticles (AuNPs) have also been demonstrated as excellent nanomaterials for medical applications. Previous studies have showed that both AgNPs and AuNPs have anti-microbial or anti-inflammatory properties. We have developed a novel green chemistry that could generate the AuAg nanocomposites, through the reduction of tannic acid (TNA). The bioactivity of the nanocomposites was investigated inS. aureusbiofilm-exposed human osteoblast cells (hFOB1.19). The current synthesis method is a simple, low-cost, eco-friendly, and green chemistry approach. Our results showed that the AuAg nanocomposites were biocompatible with low cell toxicity, and did not induce cell apoptosis nor necrosis in hFOB1.19 cells. Moreover, AuAg nanocomposites could effectively inhibited the accumulation of reactive oxygen species (ROS) in mitochondria and in rest of cellular compartments after exposing to bacterial biofilm (by reducing 0.78, 0.77-fold in the cell and mitochondria, respectively). AuAg nanocomposites also suppressed ROS-triggered inflammatory protein expression via MAPKs and Akt pathways. The current data suggest that AuAg nanocomposites have the potential to be a good therapeutic agent in treating inflammation in bacteria-infected bone diseases.
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Affiliation(s)
- Chiang-Wen Lee
- Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
| | - Zih-Chan Lin
- Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
| | - Yao-Chang Chiang
- Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan
| | - Sin-Yu Li
- Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan
| | - Jyun-Jia Ciou
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Kuan-Wen Liu
- Department of Applied Chemistry, National Pingtung University, Pingtung 90003, Taiwan
| | - Yu-Ching Lin
- Department of Applied Chemistry, National Pingtung University, Pingtung 90003, Taiwan
| | - Bo-Jie Huang
- Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Kuo-Ti Peng
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Mei-Ling Fang
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung 833, Taiwan
- Super Micro Research and Technology Center, Cheng Shiu University, Kaohsiung 833, Taiwan
| | - Tzu-En Lin
- Institute of Biomedical Engineering, Department of Electronics and Computer Engineering, National Yang Ming Chiao Tung University, Taiwan
| | - Mei-Yi Liao
- Department of Applied Chemistry, National Pingtung University, Pingtung 90003, Taiwan
| | - Chian-Hui Lai
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
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3
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Wu S, Wu B, Liu Y, Deng S, Lei L, Zhang H. Mini Review Therapeutic Strategies Targeting for Biofilm and Bone Infections. Front Microbiol 2022; 13:936285. [PMID: 35774451 PMCID: PMC9238355 DOI: 10.3389/fmicb.2022.936285] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 05/25/2022] [Indexed: 12/21/2022] Open
Abstract
Bone infection results in a complex inflammatory response and bone destruction. A broad spectrum of bacterial species has been involved for jaw osteomyelitis, hematogenous osteomyelitis, vertebral osteomyelitis or diabetes mellitus, such as Staphylococcus aureus (S. aureus), coagulase-negative Staphylococcus species, and aerobic gram-negative bacilli. S. aureus is the major pathogenic bacterium for osteomyelitis, which results in a complex inflammatory response and bone destruction. Although various antibiotics have been applied for bone infection, the emergence of drug resistance and biofilm formation significantly decrease the effectiveness of those agents. In combination with gram-positive aerobes, gram-negative aerobes and anaerobes functionally equivalent pathogroups interact synergistically, developing as pathogenic biofilms and causing recurrent infections. The adhesion of biofilms to bone promotes bone destruction and protects bacteria from antimicrobial agent stress and host immune system infiltration. Moreover, bone is characterized by low permeability and reduced blood flow, further hindering the therapeutic effect for bone infections. To minimize systemic toxicity and enhance antibacterial effectiveness, therapeutic strategies targeting on biofilm and bone infection can serve as a promising modality. Herein, we focus on biofilm and bone infection eradication with targeting therapeutic strategies. We summarize recent targeting moieties on biofilm and bone infection with peptide-, nucleic acid-, bacteriophage-, CaP- and turnover homeostasis-based strategies. The antibacterial and antibiofilm mechanisms of those therapeutic strategies include increasing antibacterial agents’ accumulation by bone specific affinity, specific recognition of phage-bacteria, inhibition biofilm formation in transcription level. As chronic inflammation induced by infection can trigger osteoclast activation and inhibit osteoblast functioning, we additionally expand the potential applications of turnover homeostasis-based therapeutic strategies on biofilm or infection related immunity homeostasis for host-bacteria. Based on this review, we expect to provide useful insights of targeting therapeutic efficacy for biofilm and bone infection eradication.
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Affiliation(s)
- Shizhou Wu
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Binjie Wu
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Yunjie Liu
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Shu Deng
- Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, United States
| | - Lei Lei
- West China Hospital of Stomatology, Sichuan University, Chengdu, China
- *Correspondence: Lei Lei,
| | - Hui Zhang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China
- Hui Zhang,
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Hu J, Li W, Huang B, Zhao Q, Fan X. The Profiles of Long Non-coding RNA and mRNA Transcriptome Reveals the Genes and Pathway Potentially Involved in Pasteurella multocida Infection of New Zealand Rabbits. Front Vet Sci 2021; 8:591273. [PMID: 34026883 PMCID: PMC8131872 DOI: 10.3389/fvets.2021.591273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 03/19/2021] [Indexed: 12/22/2022] Open
Abstract
Infection with Pasteurella multocida (P. multocida) causes severe epidemic diseases in rabbits and is responsible for the pronounced economic losses in the livestock industry. Long non-coding RNAs (lncRNAs) have been proven to exert vital functions in regulating the host immune responses to bacterial attacks. However, little is known about how lncRNAs participate in the rabbit's immune response against P. multocida infection in the lungs. LncRNA and mRNA expression profiles were analyzed by transcriptomics and bioinformatics during P. multocida infection. A total of 336 lncRNAs and 7,014 mRNAs were differentially regulated at 1 day and 3 days post infection (dpi). Nearly 80% of the differentially expressed lncRNAs exhibited an increased expression at 3 dpi suggesting that the P. multocida genes are responsible for regulation. Moreover, GO and KEGG enriched analysis indicated that the immune-related pathways including pattern recognition receptors (PRRs), cytokines, and chemokines were significantly enriched at 3 dpi. These results indicate that the dysregulated immune-related genes may play crucial roles in defending against P. multocida attacks. Overall, these results advance our cognition of the role of lncRNAs and mRNAs in modulating the rabbit's innate immune response against P. multocida attacks, which will offer a valuable clue for further studies into exploring P. multocida-related diseases in human.
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Affiliation(s)
- Jiaqing Hu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Wenqiang Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Bing Huang
- Shandong Provincial Key Laboratory of Poultry Disease Diagnose and Immune, Institute of Poultry, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Qiaoya Zhao
- Shandong Provincial Key Laboratory of Poultry Disease Diagnose and Immune, Institute of Poultry, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Xinzhong Fan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian, China
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5
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Neumann A, Happonen L, Karlsson C, Bahnan W, Frick IM, Björck L. Streptococcal protein SIC activates monocytes and induces inflammation. iScience 2021; 24:102339. [PMID: 33855284 PMCID: PMC8027542 DOI: 10.1016/j.isci.2021.102339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/21/2021] [Accepted: 03/16/2021] [Indexed: 02/08/2023] Open
Abstract
Streptococcus pyogenes is a major bacterial pathogen in the human population and isolates of the clinically important M1 serotype secrete protein Streptococcal inhibitor of complement (SIC) known to interfere with human innate immunity. Here we find that SIC from M1 bacteria interacts with TLR2 and CD14 on monocytes leading to the activation of the NF-κB and p38 MAPK pathways and the release of several pro-inflammatory cytokines (e.g. TNFα and INFγ). In human plasma, SIC binds clusterin and histidine-rich glycoprotein, and whole plasma, and these two purified plasma proteins enhanced the activation of monocytes by SIC. Isolates of the M55 serotype secrete an SIC homolog, but this protein did not activate monocytes. M1 isolates are common in cases of invasive S. pyogenes infections characterized by massive inflammation, and the results of this study indicate that the pro-inflammatory property of SIC contributes to the pathology of these severe clinical conditions.
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Affiliation(s)
- Ariane Neumann
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
| | - Lotta Happonen
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
| | - Christofer Karlsson
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
| | - Wael Bahnan
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
| | - Inga-Maria Frick
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
| | - Lars Björck
- Division of Infection Medicine, Department of Clinical Sciences, BMC, Lund University, 22184, Lund, Sweden
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6
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Cheng W, Yao M, Liu F. Bitter Taste Receptor as a Therapeutic Target in Orthopaedic Disorders. Drug Des Devel Ther 2021; 15:895-903. [PMID: 33679130 PMCID: PMC7926036 DOI: 10.2147/dddt.s289614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/10/2021] [Indexed: 12/11/2022] Open
Abstract
Non-gustatory, extraoral bitter taste receptors (T2Rs) are G-protein coupled receptors that are expressed throughout the body and have various functional responses when stimulated by bitter agonists. Presently, T2Rs have been found to be expressed in osteoclasts and osteocytes where osteoclasts were capable of detecting bacterial quorum-sensing molecules through the T2R38 isoform. In the innate immune system, stimulating T2Rs induces anti-inflammatory and anti-pathogenic effects through the phospholipase C/inositol triphosphate pathway, which leads to intracellular calcium release from the endoplasmic reticulum. The immune cells with functional responses to T2R activation also play a role in bone inflammation and orthopaedic disorders. Furthermore, increasing intracellular calcium levels in bone cells through T2R activation can potentially influence bone formation and resorption. With recent studies finding T2R expression in bone cells, we examine the potential of targeting this receptor to treat bone inflammation and to promote bone anabolism.
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Affiliation(s)
- Weyland Cheng
- Department of Orthopaedic Surgery, Children’s Hospital Affiliated to Zhengzhou University, Henan Children’s Hospital, Zhengzhou Children’s Hospital, Zhengzhou, Henan, People’s Republic of China
- Henan Provincial Key Laboratory of Children’s Genetics and Metabolic Diseases, Children’s Hospital Affiliated to Zhengzhou University, Henan Children’s Hospital, Zhengzhou Children’s Hospital, Zhengzhou, Henan, People’s Republic of China
| | - Manye Yao
- Department of Orthopaedic Surgery, Children’s Hospital Affiliated to Zhengzhou University, Henan Children’s Hospital, Zhengzhou Children’s Hospital, Zhengzhou, Henan, People’s Republic of China
| | - Fangna Liu
- Department of Orthopaedic Surgery, Children’s Hospital Affiliated to Zhengzhou University, Henan Children’s Hospital, Zhengzhou Children’s Hospital, Zhengzhou, Henan, People’s Republic of China
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Berger SM, Griffin JS, Dent SC. Phenotypes and pathways: Working toward an integrated skeletal biology in biological anthropology. Am J Hum Biol 2020; 33:e23450. [PMID: 32511865 DOI: 10.1002/ajhb.23450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/01/2020] [Accepted: 05/17/2020] [Indexed: 01/02/2023] Open
Affiliation(s)
- Steph M Berger
- Department of Anthropology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Jacob S Griffin
- Department of Anthropology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Sophia C Dent
- Department of Anthropology, University of North Carolina, Chapel Hill, North Carolina, USA
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8
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Vincent QB, Belkadi A, Fayard C, Marion E, Adeye A, Ardant MF, Johnson CR, Agossadou D, Lorenzo L, Guergnon J, Bole-Feysot C, Manry J, Nitschké P, Theodorou I, Casanova JL, Marsollier L, Chauty A, Abel L, Alcaïs A. Microdeletion on chromosome 8p23.1 in a familial form of severe Buruli ulcer. PLoS Negl Trop Dis 2018; 12:e0006429. [PMID: 29708969 PMCID: PMC5945055 DOI: 10.1371/journal.pntd.0006429] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 05/10/2018] [Accepted: 04/04/2018] [Indexed: 12/18/2022] Open
Abstract
Buruli ulcer (BU), the third most frequent mycobacteriosis worldwide, is a neglected tropical disease caused by Mycobacterium ulcerans. We report the clinical description and extensive genetic analysis of a consanguineous family from Benin comprising two cases of unusually severe non-ulcerative BU. The index case was the most severe of over 2,000 BU cases treated at the Centre de Dépistage et de Traitement de la Lèpre et de l’Ulcère de Buruli, Pobe, Benin, since its opening in 2003. The infection spread to all limbs with PCR-confirmed skin, bone and joint infections. Genome-wide linkage analysis of seven family members was performed and whole-exome sequencing of both patients was obtained. A 37 kilobases homozygous deletion confirmed by targeted resequencing and located within a linkage region on chromosome 8 was identified in both patients but was absent from unaffected siblings. We further assessed the presence of this deletion on genotyping data from 803 independent local individuals (402 BU cases and 401 BU-free controls). Two BU cases were predicted to be homozygous carriers while none was identified in the control group. The deleted region is located close to a cluster of beta-defensin coding genes and contains a long non-coding (linc) RNA gene previously shown to display highest expression values in the skin. This first report of a microdeletion co-segregating with severe BU in a large family supports the view of a key role of human genetics in the natural history of the disease. Buruli ulcer (BU) is a tropical infectious disease caused by Mycobacterium ulcerans. Although being the third most common mycobacterial disease in the world after tuberculosis and leprosy, BU remains a neglected tropical disease and an emerging health emergency in several developing countries. It causes profound skin ulcerations and eventually bone infections. Life-long functional sequelae are observed in more than 20% of patients, most of whom are children. Several observations, in particular the large variability in the clinical severity of the disease after infection, suggested the role of human genetic factors in the development of BU. We report the case of a 5-year old girl from Benin, born of consanguineous parents, who suffered from extensive dissemination of the mycobacterium in the skin, bones and joints. One of her siblings was also affected. The deep genetic exploration of this family led to the identification of a small deletion on chromosome 8 in both patients but absent from unaffected siblings. Interestingly, the deletion is located within a region containing genes encoding for beta-defensins, a family of antimicrobial peptides involved in both innate immunity and healing process of skin wounds. This first report of a microdeletion associated with severe BU in a large family supports the view of a key role of human genetics in the natural history of the disease.
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Affiliation(s)
- Quentin B Vincent
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France
| | - Aziz Belkadi
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France
| | - Cindy Fayard
- Department of Radiology, Kremlin-Bicêtre Hospital, Paris, France
| | - Estelle Marion
- Center for Research in Cancerology & Immunology Nantes-Angers (CRCNA), INSERM, Nantes University, Angers University, Angers, France.,Centre de Dépistage et de Traitement de la Lèpre et de l'Ulcère de Buruli (CDTLUB), Fondation Raoul Follereau, Pobe, Benin
| | - Ambroise Adeye
- Centre de Dépistage et de Traitement de la Lèpre et de l'Ulcère de Buruli (CDTLUB), Fondation Raoul Follereau, Pobe, Benin.,Fondation Raoul Follereau, Paris, France
| | - Marie-Françoise Ardant
- Centre de Dépistage et de Traitement de la Lèpre et de l'Ulcère de Buruli (CDTLUB), Fondation Raoul Follereau, Pobe, Benin.,Fondation Raoul Follereau, Paris, France
| | - Christian R Johnson
- Fondation Raoul Follereau, Paris, France.,Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable, Université d'Abomey-Calavi, Cotonou, Benin
| | - Didier Agossadou
- Leprosy and Buruli Ulcer national control program, Beninese Ministry of Health, Cotonou, Benin
| | - Lazaro Lorenzo
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France
| | - Julien Guergnon
- INSERM UMR S 945, Pierre et Marie Curie University, Paris, France
| | - Christine Bole-Feysot
- Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,Genomic Core Facility, Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, INSERM UMR-1163, Paris, France
| | - Jeremy Manry
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France
| | - Patrick Nitschké
- Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,Bioinformatics Core Facility, Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, INSERM UMR-1163, Paris, France
| | - Ioannis Theodorou
- Center for Immunology and Infectious Diseases, INSERM UMR S 1135, Pierre et Marie Curie University, Paris, France.,Department of Immunology, Pitié-Salpêtrière Hospital, Paris, France
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, United States of America.,Howard Hughes Medical Institute, New York, United States of America.,Pediatric Hematology-Immunology Unit, Necker Hospital for Sick Children, Paris, France
| | - Laurent Marsollier
- Center for Research in Cancerology & Immunology Nantes-Angers (CRCNA), INSERM, Nantes University, Angers University, Angers, France
| | - Annick Chauty
- Centre de Dépistage et de Traitement de la Lèpre et de l'Ulcère de Buruli (CDTLUB), Fondation Raoul Follereau, Pobe, Benin.,Fondation Raoul Follereau, Paris, France
| | - Laurent Abel
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, United States of America
| | - Alexandre Alcaïs
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-1163, Paris, France.,Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France
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Jin X, Zhang M, Zhu XM, Fan YR, Du CG, Bao HE, Xu SG, Tian QZ, Wang YH, Yang YF. Modulation of ovine SBD-1 expression by Saccharomyces cerevisiae in ovine ruminal epithelial cells. BMC Vet Res 2018; 14:134. [PMID: 29673353 PMCID: PMC5907711 DOI: 10.1186/s12917-018-1445-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/26/2018] [Indexed: 11/10/2022] Open
Abstract
Background The ovine rumen is involved in host defense responses and acts as the immune interface with the environment. The ruminal mucosal epithelium plays an important role in innate immunity and secretes antimicrobial innate immune molecules that have bactericidal activity against a variety of pathogens. Defensins are cationic peptides that are produced by the mucosal epithelia and have broad-spectrum antimicrobial activity. Sheep β-defensin-1 (SBD-1) is one of the most important antibacterial peptides in the rumen. The expression of SBD-1 is regulated by the probiotic, Saccharomyces cerevisiae (S.c); however, the regulatory mechanism has not yet been elucidated. In the current study, the effects of S.c on the expression and secretion of SBD-1 in ovine ruminal epithelial cells were investigated using quantitative real-time PCR (qPCR) and enzyme-linked immunosorbent assay (ELISA). In addition, specific inhibitors were used to block the nuclear factor kappa-light-chain enhancer of activated B cells (NF-κB), p38, JNK, and ERK1/2 signalling pathways separately or simultaneously, to determine the regulatory mechanism(s) governing S.c-induced SBD-1 upregulation. Results Incubation with S.c induced release of SBD-1 by ovine ruminal epithelial cells, with SBD-1 expression peaking after 12 h of incubation. The highest SBD-1 expression levels were achieved after treatment with 5.2 × 107 CFU∙mL− 1 S.c. Treatment with S.c resulted in significantly increased NF-κB, p38, JNK, ERK1/2, TLR2, and MyD88 mRNA expression. Whereas inhibition of mitogen-activated protein kinases (MAPKs) and NF-κB gene expression led to a decrease in SBD-1 expression. Conclusions S.c was induced SBD-1 expression and the S.c-induced up-regulation of SBD-1 expression may be related to TLR2 and MyD88 in ovine ruminal epithelial cells. This is likely simultaneously regulated by the MAPKs and NF-κB pathways with the p38 axis of the MAPKs pathway acting as the primary regulator. Thus, the pathways regulating S.c-induced SBD-1 expression may be related to TLR2-MyD88-NF-κB/MAPKs, with the TLR2-MyD88-p38 component of the TLR2-MyD88-MAPKs signalling acting as the main pathway.
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Affiliation(s)
- Xin Jin
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Man Zhang
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Xue-Min Zhu
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China.,College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471000, People's Republic of China
| | - Yan-Ru Fan
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Chen-Guang Du
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China.,Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, 014109, People's Republic of China
| | - Hua-Er Bao
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Siri-Guleng Xu
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Qiao-Zhen Tian
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Yun-He Wang
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Yin-Feng Yang
- Veterinary Medicine College of Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China. .,Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China.
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10
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Wu C, Qin X, Li P, Pan T, Ren W, Li N, Peng Y. Transcriptomic Analysis on Responses of Murine Lungs to Pasteurella multocida Infection. Front Cell Infect Microbiol 2017; 7:251. [PMID: 28676843 PMCID: PMC5476747 DOI: 10.3389/fcimb.2017.00251] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 05/30/2017] [Indexed: 01/09/2023] Open
Abstract
Pasteurella multocida infection in cattle causes serious epidemic diseases and leads to great economic losses in livestock industry; however, little is known about the interaction between host and P. multocida in the lungs. To explore a fully insight into the host responses in the lungs during P. multocida infection, a mouse model of Pasteurella pneumonia was established by intraperitoneal infection, and then transcriptomic analysis of infected lungs was performed. P. multocida localized and grew in murine lungs, and induced inflammation in the lungs, as well as mice death. With transcriptomic analysis, approximately 107 clean reads were acquired. 4236 differently expressed genes (DEGs) were detected during P. multocida infection, of which 1924 DEGs were up-regulated. By gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) enrichments, 5,303 GO enrichments and 116 KEGG pathways were significantly enriched in the context of P. multocida infection. Interestingly, genes related to immune responses, such as pattern recognition receptors (PRRs), chemokines and inflammatory cytokines, were significantly up-regulated, suggesting the key roles of these genes in P. multocida infection. Transcriptomic data showed that IFN-γ/IL-17-related genes were increased, which were validated by qRT-PCR, ELISA, and immunoblotting. Our study characterized the transcriptomic profile of the lungs in mice upon Pasteurella infection, and our findings could provide valuable information with respect to better understanding the responses in mice during P. multocida infection.
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Affiliation(s)
- Chenlu Wu
- College of Animal Science and Technology, Southwest UniversityChongqing, China
| | - Xiaobin Qin
- College of Animal Science and Technology, Southwest UniversityChongqing, China
| | - Pan Li
- College of Animal Science and Technology, Southwest UniversityChongqing, China
| | - Tingting Pan
- College of Animal Science and Technology, Southwest UniversityChongqing, China
| | - Wenkai Ren
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock, Institute of Subtropical Agriculture, Chinese Academy of SciencesChangsha, China
| | - Nengzhang Li
- College of Animal Science and Technology, Southwest UniversityChongqing, China
| | - Yuanyi Peng
- College of Animal Science and Technology, Southwest UniversityChongqing, China
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11
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Interleukin-17A (IL-17A) and IL-17F Are Critical for Antimicrobial Peptide Production and Clearance of Staphylococcus aureus Nasal Colonization. Infect Immun 2016; 84:3575-3583. [PMID: 27736775 DOI: 10.1128/iai.00596-16] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 10/02/2016] [Indexed: 01/05/2023] Open
Abstract
Approximately 20% of the population is persistently colonized by Staphylococcus aureus in the nares. Th17-like immune responses mediated by the interleukin-17 (IL-17) family of cytokines and neutrophils are becoming recognized as relevant host defense mechanisms for resolution of S. aureus mucocutaneous infections. Since antimicrobial peptides are regulated by the IL-17 cytokines, we sought to determine the role of IL-17 cytokines in production of antimicrobial peptides in a murine model of S. aureus nasal carriage. We discovered that nasal tissue supernatants have antistaphylococcal activity, and mice deficient in both IL-17A and IL-17F lost the ability to clear S. aureus nasal colonization. IL-17A was found to be sufficient for nasal mBD-3 production ex vivo and was required for CRAMP, mBD-3, and mBD-14 expression in response to S. aureus colonization in vivo These data were confirmed in a clinical study of nasal secretions in which elevated levels of the human forms of these antimicrobial peptides were found in nasal secretions from healthy human subjects when they were colonized with S. aureus but not in secretions from noncolonized subjects. Together, these data provide evidence for the importance of IL-17A regulation of antimicrobial peptides and IL-17F in the clearance of S. aureus nasal carriage.
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12
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Zhu C, Bao NR, Chen S, Zhao JN. HBD-3 regulation of the immune response and the LPS/TLR4-mediated signaling pathway. Exp Ther Med 2016; 12:2150-2154. [PMID: 27703496 PMCID: PMC5038901 DOI: 10.3892/etm.2016.3579] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 08/03/2016] [Indexed: 12/29/2022] Open
Abstract
The aim of the study was to investigate the mechanisms of human β-defensin 3 (HBD-3) regulation of the immune response and the lipopolysaccharide/Toll-like receptor-4 (LPS/TLR4)-mediated signaling pathway. A TLR4 extracellular gene fragment was cloned into the pET32a plasmid to determine its expression in Escherichia coli (E. coli) and purification. A dialysis labeling method was used to stain HBD-3 with fluorescein isothiocyanate (FITC). FITC-HBD-3 was used to induce the differentiation of human peripheral blood mononuclear cells (MNC) into immature dendritic cells (imDC) in vitro. Binding reactions were established using FITC-HBD-3 and sTLR4 into cell suspensions. Flow cytometry (FCM) was used to analyze the results. Western blot analysis confirmed the identity of nuclear factor-κB (NF-κB) and was used to quantify its nuclear translocation. The results showed that, HBD-3 bound to imDC in a Ca2+-dependent manner, and sTLR4 and LPS competitively inhibited the binding. HBD-3 competitively blocked the binding of LPS and imDC by binding to imDC. HBD-3 significantly decreased the translocation of LPS-induced NF-κB into the nucleus. In conclusion, HBD-3 can competitively inhibit the binding of LPS and imDC through its binding to TLR4 molecules, which are expressed in imDC, thereby preventing LPS from inducing the maturity of the imDCs.
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Affiliation(s)
- Chen Zhu
- Department of Orthopaedic Surgery, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, P.R. China
| | - Ni-Rong Bao
- Department of Orthopaedic Surgery, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, P.R. China
| | - Shuo Chen
- Department of Orthopaedic Surgery, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, P.R. China
| | - Jian-Ning Zhao
- Department of Orthopaedic Surgery, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, P.R. China
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13
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Josse J, Velard F, Gangloff SC. Staphylococcus aureus vs. Osteoblast: Relationship and Consequences in Osteomyelitis. Front Cell Infect Microbiol 2015; 5:85. [PMID: 26636047 PMCID: PMC4660271 DOI: 10.3389/fcimb.2015.00085] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 11/10/2015] [Indexed: 12/11/2022] Open
Abstract
Bone cells, namely osteoblasts and osteoclasts work in concert and are responsible for bone extracellular matrix formation and resorption. This homeostasis is, in part, altered during infections by Staphylococcus aureus through the induction of various responses from the osteoblasts. This includes the over-production of chemokines, cytokines and growth factors, thus suggesting a role for these cells in both innate and adaptive immunity. S. aureus decreases the activity and viability of osteoblasts, by induction of apoptosis-dependent and independent mechanisms. The tight relationship between osteoclasts and osteoblasts is also modulated by S. aureus infection. The present review provides a survey of the relevant literature discussing the important aspects of S. aureus and osteoblast interaction as well as the ability for antimicrobial peptides to kill intra-osteoblastic S. aureus, hence emphasizing the necessity for new anti-infectious therapeutics.
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Affiliation(s)
- Jérôme Josse
- EA 4691 Biomatériaux et inflammation en site osseux, Pôle Santé, Université de Reims Champagne-Ardenne Reims, France
| | - Frédéric Velard
- EA 4691 Biomatériaux et inflammation en site osseux, Pôle Santé, Université de Reims Champagne-Ardenne Reims, France
| | - Sophie C Gangloff
- EA 4691 Biomatériaux et inflammation en site osseux, Pôle Santé, Université de Reims Champagne-Ardenne Reims, France
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14
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Li S, Zhu C, Fang S, Zhang W, He N, Xu W, Kong R, Shang X. Ultrasound microbubbles enhance human β-defensin 3 against biofilms. J Surg Res 2015; 199:458-69. [PMID: 26119274 DOI: 10.1016/j.jss.2015.05.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 04/06/2015] [Accepted: 05/19/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND The infection of orthopedic implantation devices with Staphylococcus has been a serious concern within the biomaterial community. Treatments are not always successful because of antibiotic-resistant bacteria biofilm infection. Recent studies have shown that combination of antibiotics with low-frequency ultrasound (US) can enhance the bactericidal activity effectively against the formation of biofilms in vitro pilot study. Meanwhile, microbubbles evolved as targeted drug-delivery agents can provide nuclei for inertial cavitation and lower the threshold for US-induced cavitation. Human β-defensin 3 (HBD-3) is a cationic antimicrobial peptide considered particularly promising for future bactericidal employment and has effect on antibiotic-resistant Staphylococcus biofilms. But the effect has not been reported when combined with US-targeted microbubble destruction (UTMD) in vivo. METHODS In this study, we evaluated the effect of HBD-3 combined with UTMD on two tested Staphylococcus by the spread plate method, crystal violet staining, confocal laser scanning microscopy, scanning electron microscopy, and real-time polymerase chain reaction. RESULTS In the study, we found that the biofilm densities, the percentage of live cells, and the viable counts of two tested Staphylococcus that recovered from the biofilm on the titanium surface in mice were significantly decreased in the group of the HBD-3 combined with UTMD, compared with those of other groups. Furthermore, in the experiment, we found out that UTMD could enhance HBD-3 activity, which inhibits the biofilm-associated genes expression of icaAD and the methicillin-resistance genes expression of MecA by promoting the icaR expression simultaneously. CONCLUSIONS The combination of HBD-3 with UTMD can play a significant role on the elimination of the antibiotic-resistant Staphylococcus biofilms in vivo.
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Affiliation(s)
- Shoumin Li
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Chen Zhu
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Shiyuan Fang
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Weiwei Zhang
- Department of Geriatrics, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Nianan He
- Department of Ultrasound, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Wei Xu
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Rong Kong
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China.
| | - Xifu Shang
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China.
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15
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Zhu C, Wang J, Cheng T, Li Q, Shen H, Qin H, Cheng M, Zhang X. The potential role of increasing the release of mouse β- defensin-14 in the treatment of osteomyelitis in mice: a primary study. PLoS One 2014; 9:e86874. [PMID: 24489798 PMCID: PMC3904979 DOI: 10.1371/journal.pone.0086874] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 12/17/2013] [Indexed: 11/18/2022] Open
Abstract
Mammalian β-defensins are small cationic peptides that have been implicated in mediating innate immune defenses against microbial infection. Mouse β-defensin-14 (MBD-14), based on structural and functional similarities, appears to be an ortholog of human β-defensin-3 (HBD-3). Previous studies identified signaling pathway p38 mitogen-activated protein kinase (MAPK) that contributed to the expression of MBD-14 in mouse osteoblasts upon contacted with methicillin-resistance Staphylococcus aureus (MRSA) supernatant, which provided a theoretical basis as a promising therapeutic target in the treatment of intramedullary infection with MRSA in vivo. In this study, the medullary cavities of tibiae were contaminated with MRSA 10(3) colony forming units and different doses of p38 MAPK agonists anisomycin were followed as group III or IV in 30 mice. Fifteen animals that received phosphate- buffered saline served as group II and 15 mice were not contaminated with MRSA and received phosphate-buffered saline served as controls (group I). Follow-up was 7 days. In day 1, day 4 and day 7 postoperatively, infection was evaluated by blood routine, microbiological and histological analyses after sacrifice. All animals of group II developed microbiological and histological signs of infection. Histological signs of infection, white blood counts and cultures of group III and IV showed significantly reduced bacterial growth compared to cultures of group II. Simultaneously, different doses of anisomycin significantly induced the expression of osteoblast-associated genes, including alkaline phosphatase, osteocalcin and collagen type I. In addition, the expression of HBD-3 in human interfacial membranes around infected periprosthetic joint by staphylococcus contaminated was evaluated, and the expression pattern changed with significant induction of HBD-3 in infected periprosthetic joint compared with aseptic loosening under inflammatory conditions. Our primary study indicated that the potential antibacterial role of increased MBD-14 in the osteomyelitis mouse model.
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Affiliation(s)
- Chen Zhu
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Orthopaedic Surgery, Anhui Provincial Hospital of Anhui Medical University, Hefei, China
| | - Jiaxing Wang
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tao Cheng
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qingtian Li
- Department of Medical Microbiology and Parasitology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Shen
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Qin
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mengqi Cheng
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xianlong Zhang
- Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- * E-mail:
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