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Alan E, Daldaban F, Alan A, Aksel EG, Orhan İ, Ulaş Çinar M, Akyüz B, Arslan K. TLR4, MyD88, and TNF-α Expression in the Lungs of Akkaraman and Romanov Lambs in Response to LPS and LTA. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2023; 29:1488-1502. [PMID: 37488827 DOI: 10.1093/micmic/ozad071] [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: 03/13/2023] [Revised: 05/19/2023] [Accepted: 06/18/2023] [Indexed: 07/26/2023]
Abstract
Toll-like receptors are involved in the recognition of bacterial toxins, which cause infection in the respiratory system. This study aimed to evaluate microanatomical and histological alterations in the lungs of 24 healthy Akkaraman and Romanov lambs after the administration of lipoteichoic acid (LTA), lipopolysaccharide (LPS), and LTA + LPS and investigate the gene, protein, and immune expression levels of TLR4, MyD88, and TNF-α molecules, known to have immune functions. Microanatomical examinations showed thickened peribronchial and alveolar walls in the lungs of groups LTA, LPS, and LTA + LPS of both breeds due to immune cell infiltration. TLR4, MyD88, and TNF-α immunoexpressions were positive to varying degrees in the cytoplasm and nucleus of the bronchial and bronchiolar luminal epithelial cells, alveolar epithelial cells, and alveolar macrophages. TLR4 and TNF-α protein expressions were statistically different in the LPS-treated Romanov lambs, compared to the other groups. Among the Akkaraman lambs, TLR4 gene expression was significantly higher in group LPS, and among the Romanov lambs, TLR4, MyD88, and TNF-α gene expressions were significantly higher in group LTA + LPS. Therefore, TLR4, MyD88, and TNF-α molecules, involved in the immune response, were found to be expressed at different levels against LTA and LPS in the lungs of two different sheep breeds.
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Affiliation(s)
- Emel Alan
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Fadime Daldaban
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Aydın Alan
- Department of Anatomy, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Esma Gamze Aksel
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - İmdat Orhan
- Department of Anatomy, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Mehmet Ulaş Çinar
- Department of Animal Science, Faculty of Agriculture, Erciyes University, 38039 Kayseri, Turkey
- Department of Veterinary Microbiology & Pathology, Washington State University, Pullman, WA 99164, USA
| | - Bilal Akyüz
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
| | - Korhan Arslan
- Department of Genetics, Faculty of Veterinary Medicine, Erciyes University, 38039 Kayseri, Turkey
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Cao F, Wang C, Long D, Deng Y, Mao K, Zhong H. Network-Based Integrated Analysis of Transcriptomic Studies in Dissecting Gene Signatures for LPS-Induced Acute Lung Injury. Inflammation 2021; 44:2486-2498. [PMID: 34462829 PMCID: PMC8405180 DOI: 10.1007/s10753-021-01518-8] [Citation(s) in RCA: 15] [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: 04/21/2021] [Accepted: 07/07/2021] [Indexed: 10/26/2022]
Abstract
Acute lung injury (ALI) is a type of serious clinical syndrome leading to morbidity and mortality. However, the precise pathogenesis of ALI remains elusive. Here, we implemented an integrative meta-analysis of six GEO microarray studies with 76 samples in the ALI mouse model. A total of 958 differentially expressed genes (DEGs) were identified in LPS relative to normal samples. Then, a network-based meta-analysis was used to mine core DEGs and to unfold the interactions among these genes. We found that Ebi3 was the top upregulated genes in the LPS-induced ALI. GO, KEGG, and GSEA analyses were performed for functional annotation. qRT-PCR revealed augmented expression of six candidate genes (Stat1, Syk, Jak3, Rac2, Ripk1, and Traf6) in the established ALI mouse model with LPS exposure. Taken together, our study investigated comprehensively hub DEGs and their networks for LPS-stimulated ALI, which might afford an additional approach to determine biomarkers and therapeutic targets and explore the molecular pathophysiology toward ALI.
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Affiliation(s)
- Fang Cao
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Huichuan District, 149 Dalian Road, Zunyi, Guizhou, 563003 China
| | - Chunyan Wang
- Department of Gastroenterology, Sichuan Provincial Peoples Hospital, University of Electronic Science and Technology, Chengdu, 610000 Sichuan China
| | - Danling Long
- Department of Stomatology, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000 Hubei China
| | - Yujuan Deng
- School of Computer Science and Engineering, Shijiazhuang University, Shijiazhuang, Hebei China
| | - Kaimin Mao
- Department of Critical Care Medicine, School of Medicine, Renji Hospital, Shanghai Jiaotong University, Shanghai, 200127 China
| | - Hua Zhong
- College of Life Sciences, Wuhan University, Wuhan, 430072 Hubei China
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Domscheit H, Hegeman MA, Carvalho N, Spieth PM. Molecular Dynamics of Lipopolysaccharide-Induced Lung Injury in Rodents. Front Physiol 2020; 11:36. [PMID: 32116752 PMCID: PMC7012903 DOI: 10.3389/fphys.2020.00036] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/16/2020] [Indexed: 12/29/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a common disease entity in critical care medicine and is still associated with a high mortality. Because of the heterogeneous character of ARDS, animal models are an insturment to study pathology in relatively standardized conditions. Rodent models can bridge the gap from in vitro investigations to large animal and clinical trials by facilitating large sample sizes under physiological conditions at comparatively low costs. One of the most commonly used rodent models of acute lung inflammation and ARDS is administration of lipopolysaccharide (LPS), either into the airways (direct, pulmonary insult) or systemically (indirect, extra-pulmonary insult). This narrative review discusses the dynamics of important pathophysiological pathways contributing to the physiological response to LPS-induced injury. Pathophysiological pathways of LPS-induced lung injury are not only influenced by the type of the primary insult (e.g., pulmonary or extra-pulmonary) and presence of additional stimuli (e.g., mechanical ventilation), but also by time. As such, findings in animal models of LPS-induced lung injury may depend on the time point at which samples are obtained and physiological data are captured. This review summarizes the current evidence and highlights uncertainties on the molecular dynamics of LPS-induced lung injury in rodent models, encouraging researchers to take accurate timing of LPS-induced injury into account when designing experimental trials.
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Affiliation(s)
- Hannes Domscheit
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
| | - Maria A Hegeman
- Laboratory of Experimental Intensive Care and Anesthesiology (L∙E∙I∙C∙A), Department of Intensive Care, Academic Medical Center, Amsterdam, Netherlands.,Department of Educational Consultancy and Professional Development, Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, Netherlands
| | - Niedja Carvalho
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
| | - Peter M Spieth
- Department of Anesthesiology and Critical Care Medicine, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
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Wu Z, Chen C, Miao Y, Liu Y, Zhang Q, Li R, Ding L, Ishfaq M, Li J. Baicalin Attenuates Mycoplasma gallisepticum-Induced Inflammation via Inhibition of the TLR2-NF-κB Pathway in Chicken and DF-1 Cells. Infect Drug Resist 2019; 12:3911-3923. [PMID: 31908503 PMCID: PMC6929927 DOI: 10.2147/idr.s231908] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/10/2019] [Indexed: 12/27/2022] Open
Abstract
Background Previous reports demonstrated that baicalin possesses potential anti-inflammatory properties. The present study was conducted to determine the effects of baicalin against inflammatory responses in chicken and DF-1 cells infected with Mycoplasma gallisepticum (MG). Methods An MG infection model was developed in chickens to study the anti-inflammatory mechanism of baicalin. Baicalin was mixed in water at a dose of 450 mg/kg per day, and the treatment is continued for 7 consecutive days. Samples were taken at 1, 4, and 7 days post treatment. Results By using transmission electron microscopy, ultrastructure of lung and tracheal cells has been examined. It can be seen that the cilia cells in the MG-infected group have pyknosis, degeneration, and necrosis. In the lung tissues, alveolar type-I epithelial cells were severely damaged. In the baicalin-treated group, cilia were swollen, mushroom-shaped edema bubbles formed on the apex, and fused together. Alveolar type I epithelial cells injury was significantly reduced. Compared to MG-infection group, the levels of proinflammatory cytokines IL-1β and TNF-α were significantly decreased (P < 0.01). The corresponding proteins TLR2 and P-p65 decreased in the baicalin-treated group after 1 (p > 0.05), 4 (p < 0.05), and 7 days (p < 0.05), respectively. Conclusion The results showed that baicalin can interfere with inflammatory injury by suppressing the release of inflammatory cytokines IL-1β and TNF-α during MG infection both in vivo and in vitro. Meanwhile, baicalin suppressed TLR2-NFκB signaling pathway by inhibiting the phosphorylation of p65 and IκB, thereby affecting the expression of inflammatory factors. The results suggested that baicalin acts as a potential anti-inflammatory agent against MG infection in chicken and DF-1 cells.
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Affiliation(s)
- Zhiyong Wu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Chunli Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yusong Miao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yuhao Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Qiaomei Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Rui Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Liangjun Ding
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Muhammad Ishfaq
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Jichang Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China.,Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, People's Republic of China
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Papareddy P, Kalle M, Sørensen OE, Malmsten M, Mörgelin M, Schmidtchen A. The TFPI-2 derived peptide EDC34 improves outcome of gram-negative sepsis. PLoS Pathog 2013; 9:e1003803. [PMID: 24339780 PMCID: PMC3855554 DOI: 10.1371/journal.ppat.1003803] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 10/17/2013] [Indexed: 01/04/2023] Open
Abstract
Sepsis is characterized by a dysregulated host-pathogen response, leading to high cytokine levels, excessive coagulation and failure to eradicate invasive bacteria. Novel therapeutic strategies that address crucial pathogenetic steps during infection are urgently needed. Here, we describe novel bioactive roles and therapeutic anti-infective potential of the peptide EDC34, derived from the C-terminus of tissue factor pathway inhibitor-2 (TFPI-2). This peptide exerted direct bactericidal effects and boosted activation of the classical complement pathway including formation of antimicrobial C3a, but inhibited bacteria-induced activation of the contact system. Correspondingly, in mouse models of severe Escherichia coli and Pseudomonas aeruginosa infection, treatment with EDC34 reduced bacterial levels and lung damage. In combination with the antibiotic ceftazidime, the peptide significantly prolonged survival and reduced mortality in mice. The peptide's boosting effect on bacterial clearance paired with its inhibiting effect on excessive coagulation makes it a promising therapeutic candidate for invasive Gram-negative infections. Bacterial infections, especially sepsis, are worldwide a major cause of morbidity and mortality. Sepsis is characterized by an excessive and uncontrolled immune and coagulation response caused by bacteria and bacterial products, which eventually leads to multiple organ failure. Despite supportive treatments and administration of antibiotics, the incidence of sepsis is rising. Development of antibiotic resistance among bacteria, and the inability of antibiotics to target dysregulated host responses during severe infections and sepsis, motivates the search for novel anti-infective treatment modalities. Here, we describe a therapeutic potential of the peptide EDC34, derived from the C-terminus of tissue factor pathway inhibitor-2 (TFPI-2). The peptide's boosting effect on bacterial clearance paired with its inhibiting effect on excessive coagulation makes it a promising therapeutic candidate for invasive Gram-negative infections.
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Affiliation(s)
- Praveen Papareddy
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden
- * E-mail:
| | - Martina Kalle
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden
| | - Ole E. Sørensen
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden
| | | | - Matthias Mörgelin
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden
| | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
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The interaction of the second Kunitz-type domain (KD2) of TFPI-2 with a novel interaction partner, prosaposin, mediates the inhibition of the invasion and migration of human fibrosarcoma cells. Biochem J 2012; 441:665-74. [PMID: 21943334 DOI: 10.1042/bj20110533] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
TFPI-2 (tissue factor pathway inhibitor-2) has recently been recognized as a new tumour suppressor gene. Low expression of this protein in several types of cancers allows for enhanced tumour growth, invasion and metastasis. To investigate the molecular mechanism responsible for the tumour-suppressor effects of TFPI-2, we performed yeast two-hybrid analysis and identified PSAP (prosaposin) as a TFPI-2-interacting partner. This interaction was confirmed by co-immunoprecipitation and immunofluorescence. The region of TFPI-2 that interacts with PSAP is located in the KD2 (Kunitz-type domain 2). Further study showed that PSAP does not affect the function of TFPI-2 as a serine proteinase inhibitor, but that TFPI-2 could inhibit the invasion-promoting effects of PSAP in human HT1080 fibrosarcoma cells. The results of the present study revealed that TFPI-2 interacts with PSAP, which may play an important role in the physiology and pathology of diseases such as cancer.
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Cao Q, Jing C, Tang X, Yin Y, Han X, Wu W. Protective effect of resveratrol on acute lung injury induced by lipopolysaccharide in mice. Anat Rec (Hoboken) 2011; 294:527-32. [PMID: 21284090 DOI: 10.1002/ar.21331] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 11/09/2010] [Indexed: 11/05/2022]
Abstract
Resveratrol, a phytoalexin found in a range of plant products, may exert a variety of pharmacological activities. In this study, we investigated the effect of resveratrol on acute lung injury (ALI) induced by lipopolysaccharide (LPS) in vivo, and we found that the pretreatment with resveratrol can effectively protect mice against LPS-induced ALI. Mice were pretreated with 1 mg/kg resveratrol for 3 days before challenging with a dose of 15 mg/kg LPS. The histological result showed that resveratrol can suppress the edema, inflammatory cell infiltration, and alveolar structure damage of lungs in ALI mice, and a decrease in the lung W/D ratio was also observed in mice with resveratrol pretreatment. Additionally, resveratrol markedly decreased the production of inflammatory cytokines, including IL-1β and MIP-1α and prevented the release of nitric oxide (NO) through inhibiting the expression of inducible NO synthase in lung tissues. Furthermore, the pretreatment with resveratrol suppressed the nuclear translocation of NF-κB in lung tissues, which may be partly responsible for its effect on the ALI. In conclusion, the results presented here may suggest resveratrol as a potential therapeutic agent for treating ALI in the future.
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Affiliation(s)
- Quan Cao
- Department of ICU and Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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