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Xu L, Chen G, Zhang L, He A, Li Y. Lixisenatide ameliorated lipopolysaccharide (LPS)-induced expression of mucin and inflammation in bronchial epithelial cells. J Biochem Mol Toxicol 2024; 38:e23618. [PMID: 38229325 DOI: 10.1002/jbt.23618] [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: 04/29/2023] [Revised: 10/19/2023] [Accepted: 11/28/2023] [Indexed: 01/18/2024]
Abstract
Chronic obstructive pulmonary disease (COPD) induces serious social and economic burdens due to its high disability and mortality, the pathogenesis of which is highly involved with inflammation, oxidative stress (OS), and mechanism of mucin 5AC (MUC5AC) secretion. Lixisenatide is a selective glucagon-like peptide 1 receptor agonist recently reported to have anti-inflammatory properties. Our study will focus on the potential impact of lixisenatide on lipopolysaccharide (LPS)-induced mucin secretion and inflammation in 16 human bronchial epithelial (16HBE) cells to check its potential function in COPD. 16HBE cells were treated with LPS, with or without lixisenatide (10 and 20 nM) for 1 day. Remarkably declined cell viability, enhanced lactate dehydrogenase release, activated OS, and elevated release of inflammatory cytokines were observed in LPS-treated 16HBE cells, accompanied by the activation of nuclear factor-κB signaling, all of which were signally reversed by lixisenatide. Moreover, elevated expression and release of MUC5AC were observed in LPS-treated 16HBE cells but were markedly repressed by lixisenatide. Furthermore, the repressed nuclear factor erythroid 2-related factor 2 (Nrf2) level in LPS-treated 16HBE cells was notably rescued by lixisenatide. Lastly, following the knockdown of Nrf2, the protective function of lixisenatide on LPS-triggered MUC5AC release in 16HBE cells was significantly abrogated. Collectively, lixisenatide ameliorated LPS-induced expression of mucin and inflammation in bronchial epithelial cells by regulating Nrf2.
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Affiliation(s)
- Leiming Xu
- Department of Emergency, Binhai People's Hospital, Yancheng, Jiangsu Province, China
| | - Guoping Chen
- Department of Respiratory and Critical Care, Binhai People's Hospital, Yancheng, Jiangsu Province, China
| | - Leiming Zhang
- Department of Infectious Disease, Binhai People's Hospital, Yancheng, Jiangsu Province, China
| | - Aifeng He
- Department of Respiratory and Critical Care, Binhai People's Hospital, Yancheng, Jiangsu Province, China
| | - Yong Li
- Department of Critical Care Medicine, Binhai People's Hospital, Yancheng, Jiangsu Province, China
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Wang X, Li H, Wang J, Xu H, Xue K, Liu X, Zhang Z, Liu J, Liu Y. Staphylococcus aureus extracellular vesicles induce apoptosis and restrain mitophagy-mediated degradation of damaged mitochondria. Microbiol Res 2023; 273:127421. [PMID: 37267814 DOI: 10.1016/j.micres.2023.127421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/04/2023]
Abstract
Extracellular vesicles (EVs) are nano-sized bilayer EVs with various components. EV secretion in pathogenic Gram-positive bacteria is a universal feature that can cause disease and damage the targeted host. In this study, we isolated and purified Staphylococcus aureus (S. aureus) EVs, and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analyzed Ev's protein composition. After that, the pathway of EVs internalized into MAC-T cells was evaluated. Moreover, the activation of mitogen-activated protein kinase (MAPK) and the nuclear factor κB (NF-κB) pathway was measured by Western blot. Meanwhile, Western blot and confocal microscopy detected mitochondrial damage, apoptosis, and Parkin-mediated mitophagy. Results showed that purified S. aureus EVs exhibited a typical cup-shaped structure and internalized into MAC-T cells by lipid raft-mediated endocytic pathway. S. aureus EVs caused mitochondrial damage and apoptosis in MAC-T cells. However, degradation of the damaged mitochondria was impeded due to the Parkin-mediated mitophagy pathway being restrained by the disruption of the acidic environment of lysosomes by S. aureus EVs. Hence, our study reveals the role of S. aureus EVs in immune stimulation, disruption of mitochondria, and lysosomal acidic environment in bovine mammary epithelial cells. These findings help us understand the role of EVs in the pathogenic mechanism of S. aureus.
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Affiliation(s)
- Xiaozhou Wang
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China
| | - Hongyan Li
- The Affiliated Taian City Central Hospital of Qingdao University, Tai`an 271000, China
| | - Jie Wang
- Xinjiang Key Laboratory of Animal Infectious Diseases, Institute of Veterinary Medicine, Xinjiang Academy of Animal Science, Urumqi 830013, China
| | - Huiling Xu
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai`an 271018, China
| | - Kun Xue
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China
| | - Xiaoting Liu
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China
| | - Zhizhong Zhang
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China
| | - Jianzhu Liu
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China; Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai`an 271018, China.
| | - Yongxia Liu
- College of Veterinary Medicine, Shandong Agricultural University, Tai`an 271018, China.
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Yang J, Shin TS, Kim JS, Jee YK, Kim YK. A new horizon of precision medicine: combination of the microbiome and extracellular vesicles. Exp Mol Med 2022; 54:466-482. [PMID: 35459887 PMCID: PMC9028892 DOI: 10.1038/s12276-022-00748-6] [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: 10/28/2021] [Revised: 12/09/2021] [Accepted: 12/23/2021] [Indexed: 11/10/2022] Open
Abstract
Over several decades, the disease pattern of intractable disease has changed from acute infection to chronic disease accompanied by immune and metabolic dysfunction. In addition, scientific evidence has shown that humans are holobionts; of the DNA in humans, 1% is derived from the human genome, and 99% is derived from microbial genomes (the microbiome). Extracellular vesicles (EVs) are lipid bilayer-delimited nanoparticles and key messengers in cell-to-cell communication. Many publications indicate that microbial EVs are both positively and negatively involved in the pathogenesis of various intractable diseases, including inflammatory diseases, metabolic disorders, and cancers. Microbial EVs in feces, blood, and urine show significant differences in their profiles between patients with a particular disease and healthy subjects, demonstrating the potential of microbial EVs as biomarkers for disease diagnosis, especially for assessing disease risk. Furthermore, microbial EV therapy offers a variety of advantages over live biotherapeutics and human cell EV (or exosome) therapy for the treatment of intractable diseases. In summary, microbial EVs are a new tool in medicine, and microbial EV technology might provide us with innovative diagnostic and therapeutic solutions in precision medicine. The tiny membrane-bound vesicles containing various biomolecules that the organisms comprising our microbiome release could offer a powerful tool for precision medicine. Our bodies are home to trillions of microbes, which interact closely with our tissues to maintain a healthy physiological environment. Yoon-Keun Kim of the Institute of MD Healthcare, Seoul, South Korea, and colleagues have reviewed current research into the extracellular vesicles that these microbes use to communicate with other microbes and their human hosts. The authors note that these vesicles affect tissues throughout the body, and their activities have been linked to various disorders including asthma, Crohn’s disease and cancer. A deeper understanding of how these vesicles prevent or accelerate various conditions in different individuals could yield useful new diagnostic biomarkers and provide the foundation for interventions that are optimized for each patient.
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Affiliation(s)
- Jinho Yang
- Institute of MD Healthcare Inc., Seoul, Republic of Korea
| | - Tae-Seop Shin
- Institute of MD Healthcare Inc., Seoul, Republic of Korea
| | - Jong Seong Kim
- Institute of MD Healthcare Inc., Seoul, Republic of Korea
| | - Young-Koo Jee
- Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Republic of Korea
| | - Yoon-Keun Kim
- Institute of MD Healthcare Inc., Seoul, Republic of Korea.
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Ge L, Zou S, Yuan Z, Chen W, Wang S, Cao X, Lv X, Getachew T, Mwacharo JM, Haile A, Sun W. Sheep β-Defensin 2 Regulates Escherichia coli F17 Resistance via NF-κB and MAPK Signaling Pathways in Ovine Intestinal Epithelial Cells. BIOLOGY 2021; 10:biology10121356. [PMID: 34943272 PMCID: PMC8698448 DOI: 10.3390/biology10121356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 11/16/2022]
Abstract
Simple Summary This study was conducted to explore the antibacterial ability of sheep β-defensin 2 (SBD-2) against E. coli F17 infection in ovine intestinal epithelial cells (OIECs). Our data revealed that E. coli F17 induces SBD-2 expression in OIECs in vitro, which appears to be mediated through the activation of the signaling pathways NF-κB and MAPK. Our results provide a novel insight for the functionality of SBD-2, which could be useful for developing anti-infective drugs and/or breeding for E. coli diarrhea disease-resistant sheep. Abstract Escherichia coli (E. coli) F17 is a member of enterotoxigenic Escherichia coli, which can cause massive diarrhea and high mortality in newborn lambs. β-defensin is mainly produced by the epithelial tissue of the gastrointestinal tract in response to microbial infection. However, the molecular mechanism of sheep β-defensin 2 (SBD-2) against E. coli F17 remains unclear. This study aims to reveal the antibacterial ability of SBD-2 against E. coli F17 infection in sheep. Firstly, we established the culture system of ovine intestinal epithelial cells (OIECs) in vitro, treated with different concentrations of E. coli F17 for an indicated time. Secondly, we performed RNA interference and overexpression to investigate the effect of SBD-2 expression on E. coli F17 adhesion to OIECs. Finally, inhibitors of NF-κB and MAPK pathways were pre-treated to explore the possible relationship involving in E. coli F17 infection regulating SBD-2 expression. The results showed that E. coli F17 markedly (p < 0.01) upregulated the expression levels of SBD-2 mRNA and protein in a concentration- and time-dependent manner. Overexpression of SBD-2 contributed to enhancing E. coli F17 resistance in OIECs, while silencing SBD-2 dramatically improved the adhesion of E. coli F17 to OIECs (p < 0.05 or p < 0.01). Furthermore, E. coli F17 stimulated SBD-2 expression was obviously decreased by pre-treatment with NF-κB inhibitor PDTC, p38 MAPK inhibitor SB202190 and ERK1/2 MAPK inhibitor PD98095 (p < 0.05 or p < 0.01). Interestingly, adhesion of E. coli F17 to OIECs were highly enhanced by pre-treated with PDTC, SB202190 and PD98095. Our data suggested that SBD-2 could inhibit E. coli F17 infection in OIECs, possibly through NF-κB and MAPK signaling pathways. Our results provide useful theoretical basis on developing anti-infective drug and breeding for E. coli diarrhea disease-resistant sheep.
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Affiliation(s)
- Ling Ge
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China; (L.G.); (S.Z.); (W.C.); (S.W.)
| | - Shuangxia Zou
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China; (L.G.); (S.Z.); (W.C.); (S.W.)
| | - Zehu Yuan
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education, Yangzhou University, Yangzhou 225000, China; (Z.Y.); (X.C.); (X.L.)
| | - Weihao Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China; (L.G.); (S.Z.); (W.C.); (S.W.)
| | - Shanhe Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China; (L.G.); (S.Z.); (W.C.); (S.W.)
| | - Xiukai Cao
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education, Yangzhou University, Yangzhou 225000, China; (Z.Y.); (X.C.); (X.L.)
| | - Xiaoyang Lv
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education, Yangzhou University, Yangzhou 225000, China; (Z.Y.); (X.C.); (X.L.)
| | - Tesfaye Getachew
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa 999047, Ethiopia; (T.G.); (J.M.M.); (A.H.)
| | - Joram M. Mwacharo
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa 999047, Ethiopia; (T.G.); (J.M.M.); (A.H.)
| | - Aynalem Haile
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa 999047, Ethiopia; (T.G.); (J.M.M.); (A.H.)
| | - Wei Sun
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China; (L.G.); (S.Z.); (W.C.); (S.W.)
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education, Yangzhou University, Yangzhou 225000, China; (Z.Y.); (X.C.); (X.L.)
- Correspondence:
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Choi YS, Na HG, Bae CH, Song SY, Kim YD. Pepsin exposure in a non-acidic environment upregulates mucin 5AC (MUC5AC) expression via matrix metalloproteinase 9 (MMP9)/nuclear factor κB (NF-κB) in human airway epithelial cells. Int Forum Allergy Rhinol 2020; 11:894-901. [PMID: 32846027 DOI: 10.1002/alr.22685] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 08/03/2020] [Accepted: 08/13/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Gastric reflux (GR) is a backflow of gastric content to the aerodigestive tract. GR was previously found to be associated with inflammatory airway diseases and a potential cause of airway remodeling. Chronic exposure to gastric content may induce damage from nose to lung, because digestive enzymes and acidity are toxic to airway epithelial cells. Recently, the toxicity of pepsin in a non-acidic environment was found to increase proinflammatory cytokines and receptors in the epithelium of the aerodigestive tract. However, the effect of pepsin in non-acidic conditions on mucin expression has not been investigated in human airway epithelial cells. The purpose of this study was to evaluate the effect of pepsin on mucin 5AC (MUC5AC) expression in upper and lower airway epithelial cells as an important potential factor of non-acidic GR-related airway inflammation. METHODS In NCI-H292 cells and human nasal epithelial cells (HNEpCs), the effects and signaling pathways of pepsin on MUC5AC expression were examined using reverse-transcription polymerase chain reaction (RT-PCR), real-time PCR, enzyme immunoassay, zymography, Western blot, and immunofluorescence staining. RESULTS Pepsin increased MUC5AC expression in non-acidic condition of NCI-H292 cells and HNEpCs. Further, pepsin activated matrix metalloproteinase 9 (MMP9) and phosphorylated nuclear factor κB (NF-κB). Moreover, inhibitors of MMP9 and NF-κB significantly attenuated pepsin-induced MUC5AC expression, and the knockdown of NF-κB by small interfering RNA (siRNA) significantly blocked pepsin-induced MUC5AC expression in human airway epithelial cells. CONCLUSION These findings suggest that pepsin increased MUC5AC expression in non-acidic conditions via the activation of MMP9 and NF-κB in human airway epithelial cells.
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Affiliation(s)
- Yoon Seok Choi
- Department of Otorhinolaryngology-Head and Neck surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Hyung Gyun Na
- Department of Otorhinolaryngology-Head and Neck surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Chang Hoon Bae
- Department of Otorhinolaryngology-Head and Neck surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Si-Youn Song
- Department of Otorhinolaryngology-Head and Neck surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Yong-Dae Kim
- Department of Otorhinolaryngology-Head and Neck surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea.,Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, Republic of Korea
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Kwak S, Choi YS, Na HG, Bae CH, Song SY, Kim HG, Kim YD. Benzisothiazolinone upregulates the MUC5AC expression via ERK1/2, p38, and NF-κB pathways in airway epithelial cells. Toxicol Res (Camb) 2019; 8:704-710. [PMID: 31588347 DOI: 10.1039/c9tx00135b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 07/15/2019] [Indexed: 12/24/2022] Open
Abstract
Mucus plays an important role in protecting the respiratory tract from irritants. However, mucus hypersecretion is a major indicator of airway diseases. 1,2-Benzisothiazolin-3-one (BIT), as a microbicide, induces asthmatic inflammation. Therefore, we focused on the effects of BIT-related mucin secretion in airway epithelial cells. Our in vivo study showed increased mucus and MUC5AC expressions in the bronchioles of mice that inhaled BIT. For investigating the signaling pathways, we performed experiments in human airway epithelial cells. BIT induced the MUC5AC expression and significantly increased the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), p38, and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB). The specific inhibitors of ERK1/2, p38, and NF-κB blocked the BIT-induced MUC5AC expression. Therefore, these results suggest that BIT induces the MUC5AC expression via the ERK1/2, p38, and NF-κB pathways in human airway epithelial cells, which may be involved in mucus hypersecretion associated with airway inflammatory diseases.
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Affiliation(s)
- Soyoung Kwak
- Department of Medical Science , College of Medicine , Graduate School of Yeungnam University , Daegu , Republic of Korea.,Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Yoon Seok Choi
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Hyung Gyun Na
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Chang Hoon Bae
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Si-Youn Song
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Hyung Geun Kim
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781
| | - Yong-Dae Kim
- Department of Otorhinolaryngology-Head and Neck Surgery , College of Medicine , Yeungnam University , Daegu , Republic of Korea . ; ; Tel: +82-53-620-3781.,Regional Center for Respiratory Diseases , Yeungnam University Medical Center , Daegu , Republic of Korea
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Na HG, Kim YD, Choi YS, Bae CH, Song SY. Diesel exhaust particles elevate MUC5AC and MUC5B expression via the TLR4-mediated activation of ERK1/2, p38 MAPK, and NF-κB signaling pathways in human airway epithelial cells. Biochem Biophys Res Commun 2019; 512:53-59. [PMID: 30857636 DOI: 10.1016/j.bbrc.2019.02.146] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 02/27/2019] [Indexed: 12/31/2022]
Abstract
Exposure to diesel exhaust particles (DEPs) is known to cause serious health problems, owing to a steady increase in the number of diesel vehicles worldwide. DEPs comprise approximately 90% particle mass existing in the fine size range (≤2.5 μm) and are mainly absorbed in the respiratory tract. However, limited information is available on the effects of DEP exposure on the respiratory tract in humans. Here, we investigated the effect and signaling pathways of DEPs on the expression of mucin, especially MUC5AC and MUC5B, in human airway epithelial cells by reverse-transcriptase polymerase chain reaction (PCR), real-time PCR, enzyme-linked immunosorbent assay, western blotting, and immunofluorescence staining. The signaling pathways activated following DEP-induced expression of MUC5AC and MUC5B in airway epithelial cells were analyzed by evaluating Toll-like receptor 4 (TLR4), mitogen-activated protein kinase (MAPK; extracellular signal-regulated kinase 1/2 [ERK1/2] and p38), and nuclear factor kappa B (NF-κB) phosphorylation with western blot and small-interfering RNA (siRNA) analyses. DEPs significantly increased MUC5AC and MUC5B expression in human airway epithelial cells that was closely related to TLR4, MAPK (ERK 1/2 and p38), and NF-κB pathway activation. This is the first report to demonstrate the DEP-mediated increase in MUC5AC and MUC5B expression via the TLR4-mediated activation of ERK1/2, p38 MAPK, and NF-κB signaling pathways in human airway epithelial cells.
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Affiliation(s)
- Hyung Gyun Na
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Yong-Dae Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea; Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, Republic of Korea
| | - Yoon Seok Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Chang Hoon Bae
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Si-Youn Song
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea.
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Tartaglia NR, Breyne K, Meyer E, Cauty C, Jardin J, Chrétien D, Dupont A, Demeyere K, Berkova N, Azevedo V, Guédon E, Le Loir Y. Staphylococcus aureus Extracellular Vesicles Elicit an Immunostimulatory Response in vivo on the Murine Mammary Gland. Front Cell Infect Microbiol 2018; 8:277. [PMID: 30186772 PMCID: PMC6113362 DOI: 10.3389/fcimb.2018.00277] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/25/2018] [Indexed: 12/20/2022] Open
Abstract
Staphylococcus aureus is a major pathogen responsible for bovine mastitis, the most common and costly disease affecting dairy cattle. S. aureus naturally releases extracellular vesicles (EVs) during its growth. EVs play an important role in the bacteria-bacteria and bacteria-host interactions and are notably considered as nanocarriers that deliver virulence factors to the host tissues. Whether EVs play a role in a mastitis context is still unknown. In this work, we showed that S. aureus Newbould 305 (N305), a bovine mastitis isolate, has the ability to generate EVs in vitro with a designated protein content. Purified S. aureus N305-secreted EVs were not cytotoxic when tested in vitro on MAC-T and PS, two bovine mammary epithelial cell lines. However, they induced the gene expression of inflammatory cytokines at levels similar to those induced by live S. aureus N305. The in vivo immune response to purified S. aureus N305-secreted EVs was tested in a mouse model for bovine mastitis and their immunogenic effect was compared to that of live S. aureus N305, heat-killed S. aureus N305 and to S. aureus lipoteichoic acid (LTA). Clinical and histopathological signs were evaluated and pro-inflammatory and chemotactic cytokine levels were measured in the mammary gland 24 h post-inoculation. Live S. aureus induced a significantly stronger inflammatory response than that of any other condition tested. Nevertheless, S. aureus N305-secreted EVs induced a dose-dependent neutrophil recruitment and the production of a selected set of pro-inflammatory mediators as well as chemokines. This immune response elicited by intramammary S. aureus N305-secreted EVs was comparable to that of heat-killed S. aureus N305 and, partly, by LTA. These results demonstrated that S. aureus N305-secreted EVs induce a mild inflammatory response distinct from the live pathogen after intramammary injection. Overall, our combined in vitro and in vivo data suggest that EVs are worth to be investigated to better understand the S. aureus pathogenesis and are relevant tools to develop strategies against bovine S. aureus mastitis.
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Affiliation(s)
- Natayme R. Tartaglia
- STLO, INRA, Agrocampus Ouest, Rennes, France
- Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Koen Breyne
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Evelyne Meyer
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | | | | | - Denis Chrétien
- CNRS, Institut de Génétique et Développement de Rennes - UMR 6290, Université de Rennes, Rennes, France
| | - Aurélien Dupont
- CNRS, INSERM, Biologie, Santé, Innovation Technologique de Rennes - UMS 3480, Université de Rennes, Rennes, France
| | - Kristel Demeyere
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | | | - Vasco Azevedo
- Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Eric Guédon
- STLO, INRA, Agrocampus Ouest, Rennes, France
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Bae CH, Choi YS, Na HG, Song SY, Kim YD. Interleukin (IL) 36 gamma induces mucin 5AC, oligomeric mucus/gel-forming expression via IL-36 receptor-extracellular signal regulated kinase 1 and 2, and p38-nuclear factor kappa-light-chain-enhancer of activated B cells in human airway epithelial cells. Am J Rhinol Allergy 2018; 32:87-93. [PMID: 29644902 DOI: 10.1177/1945892418762844] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Mucin 5AC, oligomeric mucus/gel-forming (MUC5AC) expression is significantly increased in allergic and inflammatory airway diseases. Interleukin (IL) 36 gamma is predominantly expressed in airway epithelial cells and plays an important role in innate and adaptive immune responses. IL-36 gamma is induced by many inflammatory mediators, including cytokines and bacterial and viral infections. However, the association between IL-36 gamma and mucin secretion in human airway epithelial cells has not yet been fully investigated. OBJECTIVE The objective of this study was to determine whether IL-36 gamma might play a role in the regulation of mucin secretion in airway epithelial cells. We investigated the effect and brief signaling pathway of IL-36 gamma on MUC5AC expression in human airway epithelial cells. METHODS Enzyme immunoassay, immunoblot analysis, immunofluorescence staining, reverse transcriptase-polymerase chain reaction (PCR), and real-time PCR were performed in mucin-producing human airway epithelial NCI-H292 cells and in human nasal epithelial cells after pretreatment with IL-36 gamma, several specific inhibitors, or small interfering RNAs (siRNA). RESULTS IL-36 gamma induced MUC5AC expression and activated the phosphorylation of extracellular signal regulated kinase (ERK) 1 and 2, p38, and nuclear factor-kappa-light-chain-enhancer of activated B cells (NF-kappa B). IL-36 receptor antagonist significantly attenuated these effects. The specific inhibitor and siRNA of ERK1, ERK2, p38, and NF-kappa B significantly attenuated IL-36 gamma induced MUC5AC expression. CONCLUSION These results indicated that IL-36 gamma induced MUC5AC expression via the IL-36 receptor-mediated ERK1/2 and p38/NF-kappa B pathway in human airway epithelial cells.
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Affiliation(s)
- Chang Hoon Bae
- From the 1 Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea, and
| | - Yoon Seok Choi
- From the 1 Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea, and
| | - Hyung Gyun Na
- From the 1 Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea, and
| | - Si-Youn Song
- From the 1 Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea, and
| | - Yong-Dae Kim
- From the 1 Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Yeungnam University, Daegu, Republic of Korea, and.,2 Regional Center for Respiratory Diseases, Yeungnam University Medical Center, Daegu, Republic of Korea
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Kern R. IFAR 2017. Int Forum Allergy Rhinol 2017; 7:5-6. [DOI: 10.1002/alr.21900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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