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Heydarian N, Ferrell M, Nair AS, Roedl C, Peng Z, Nguyen TD, Best W, Wozniak KL, Rice CV. Neutralizing Staphylococcus aureus PAMPs that Trigger Cytokine Release from THP-1 Monocytes. ACS OMEGA 2024; 9:10967-10978. [PMID: 38463252 PMCID: PMC10918781 DOI: 10.1021/acsomega.4c00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/02/2024] [Accepted: 02/08/2024] [Indexed: 03/12/2024]
Abstract
Innate immunity has considerable specificity and can discriminate between individual species of microbes. In this regard, pathogens are "seen" as dangerous to the host and elicit an inflammatory response capable of destroying the microbes. This immune discrimination is achieved by toll-like receptors on host cells recognizing pathogens, such as Staphylococcus aureus, and microbe-specific pathogen-associated molecular pattern (PAMP) molecules, such as lipoteichoic acid (LTA). PAMPs impede wound healing by lengthening the inflammatory phase of healing and contributing to the development of chronic wounds. Preventing PAMPs from triggering the release of inflammatory cytokines will counteract the dysregulation of inflammation. Here, we use ELISA to evaluate the use of cationic molecules branched polyethylenimine (BPEI), PEGylated BPEI (PEG-BPEI), and polymyxin-B to neutralize anionic LTA and lower levels of TNF-α cytokine release from human THP-1 monocytes in a concentration-dependent manner. Additional data collected with qPCR shows that BPEI and PEG-BPEI reduce the expression profile of the TNF-α gene. Similar effects are observed for the neutralization of whole-cell S. aureus bacteria. In vitro cytotoxicity data demonstrate that PEGylation lowers the toxicity of PEG-BPEI (IC50 = 2661 μm) compared to BPEI (IC50 = 853 μM) and that both compounds are orders of magnitude less toxic than the cationic antibiotic polymyxin-B (IC50 = 79 μM). Additionally, the LTA neutralization ability of polymyxin-B is less effective than BPEI or PEG-BPEI. These properties of BPEI and PEG-BPEI expand their utility beyond disabling antibiotic resistance mechanisms and disrupting S. aureus biofilms, providing additional justification for developing these agents as wound healing therapeutics. The multiple mechanisms of action for BPEI and PEG-BPEI are superior to current wound treatment strategies that have a single modality.
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Affiliation(s)
- Neda Heydarian
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Maya Ferrell
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Ayesha S. Nair
- Department
of Microbiology and Molecular Genetics, Oklahoma State University, 307 Life Sciences East, Stillwater, Oklahoma 74078, United States
| | - Chase Roedl
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Zongkai Peng
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Tra D. Nguyen
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - William Best
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Karen L. Wozniak
- Department
of Microbiology and Molecular Genetics, Oklahoma State University, 307 Life Sciences East, Stillwater, Oklahoma 74078, United States
| | - Charles V. Rice
- Department
of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
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Han J, Zhao X, Zhao X, Li P, Gu Q. Insight into the structure, biosynthesis, isolation method and biological function of teichoic acid in different gram-positive microorganisms: A review. Int J Biol Macromol 2023; 253:126825. [PMID: 37696369 DOI: 10.1016/j.ijbiomac.2023.126825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/13/2023]
Abstract
Teichoic acid (TA) is a weakly anionic polymer present in the cell walls of Gram-positive bacteria. It can be classified into wall teichoic acid (WTA) and lipoteichoic acid (LTA) based on its localization in the cell wall. The structure and biosynthetic pathway of TAs are strain-specific and have a significant role in maintaining cell wall stability. TAs have various beneficial functions, such as immunomodulatory, anticancer and antioxidant activities. However, the purity and yield of TAs are generally not high, and different isolation methods may even affect their structural integrity, which limits the research progress on the probiotic functions of TA. This paper reviews an overview of the structure and biosynthetic pathway of TAs in different strains, as well as the research progress of the isolation and purification methods of TAs. Furthermore, this review also highlights the current research status on the biological functions of TAs. Through a comprehensive understanding of this review, it is expected to pave the way for advancements in isolating and purifying high-quality TAs and, in turn, lay a foundation for contributing to the development of targeted probiotic therapies.
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Affiliation(s)
- Jiarun Han
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Xin Zhao
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Xilian Zhao
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Ping Li
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China.
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Wang X, Peng Z, Wang L, Zhang J, Zhang K, Guo Z, Xu G, Li J. Cordyceps militaris Solid Medium Extract Alleviates Lipoteichoic Acid-Induced MH-S Inflammation by Inhibiting TLR2/NF-κB/NLRP3 Pathways. Int J Mol Sci 2023; 24:15519. [PMID: 37958501 PMCID: PMC10648577 DOI: 10.3390/ijms242115519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/19/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023] Open
Abstract
The aim of this study was to investigate the inhibitory effects of Cordyceps militaris solid medium extract (CME) and cordycepin (COR) on LTA-induced inflammation in MH-S cells and their mechanisms of action. In this study, the establishment of an LTA-induced MH-S inflammation model was determined, the CCK-8 method was used to determine the safe concentration range for a drug for COR and CME, the optimal concentration of COR and CME to exert anti-inflammatory effects was further selected, and the expression of inflammatory factors of TNF-α, IL-1β, IL-18, and IL-6 was detected using ELISA. The relative expression of TNF-α, IL-1β, IL-18, IL-6, IL-10, TLR2 and MyD88 mRNA was detected using RT-PCR, and the IL-1β, IL-18, TLR2, MyD88, NF-κB p-p65, NLRP3, pro-caspase-1, Caspase-1 and ASC protein expression in the cells were detected using Western blot; immunofluorescence assay detected the expression of Caspase-1 in MH-S cells. The results revealed that both CME and COR inhibited the levels of IL-1β, IL-18, IL-6, and TNF-α in the supernatants of LTA-induced MH-S cells and the mRNA expression levels of IL-1β, IL-18, IL-6, TNF-α, TLR2 and MyD88, down-regulated the LTA-induced IL-1β, IL-18, TLR2 in MH-S cells, MyD88, NF-κB p-p65/p65, NLRP3, ASC, pro-caspase-1, and caspase-1 protein expression levels, and inhibited LTA-induced caspase-1 activation in MH-S cells. In conclusion, CME can play a therapeutic role in LTA-induced inflammation in MH-S cells via TLR2/NF-κB/NLRP3, and may serve as a potential drug for bacterial pneumonia caused by Gram-positive bacteria.
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Affiliation(s)
| | | | | | | | | | | | | | - Jianxi Li
- Engineering & Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
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Cheng X, Liu D, Ren X, Nie Y, Zhao Y, Chen R, Wang H. The β-catenin/CBP signaling axis participates in sepsis-induced inflammatory lung injury. Exp Biol Med (Maywood) 2022; 247:1548-1557. [PMID: 35665630 PMCID: PMC9554161 DOI: 10.1177/15353702221097316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Sepsis-induced inflammatory lung injury is a key factor causing failure of the lungs and other organs, as well as death, during sepsis. In the present study, a caecal ligation and puncture (CLP)-induced sepsis model was established to investigate the effect of β-catenin on sepsis-induced inflammatory lung injury and the corresponding underlying mechanisms. C57BL/6 mice were randomly divided into five groups, namely, the sham, CLP, β-catenin knockout (KO) + CLP, XAV-939 + CLP, and ICG-001 + CLP groups; the XAV-939 + CLP and ICG-001 + CLP groups were separately subjected to intraperitoneal injections of the β-catenin inhibitors XAV-939 and ICG-001 for 1 week preoperatively and 2 days postoperatively, respectively. Forty-eight hours after CLP, we measured β-catenin expression in lung tissues and evaluated mouse mortality, histopathological characteristics of hematoxylin and eosin (H&E)-stained lung tissues, serum cytokine (tumor necrosis factor [TNF]-α, interleukin [IL]-10, and IL-1β) levels, lung myeloperoxidase (MPO) activity, and the number of apoptotic cells in the lung tissues. Our results indicated that both the inhibition of β-catenin expression and blockage of β-catenin/CREB-binding protein (CBP) interactions by ICG-001 effectively decreased mouse mortality, alleviated pathological lung injury, and reduced the serum TNF-α, IL-10, and IL-1β levels, in addition to reducing the lung MPO activity and the number of apoptotic cells in lung tissues of the sepsis model mice. Therefore, it can be deduced that the β-catenin/CBP signaling axis participates in regulating sepsis-induced inflammatory lung injury.
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Affiliation(s)
- Xia Cheng
- Department of Pathology, Fourth Medical Center, General Hospital of Chinese People’s Liberation Army, Jinzhou Medical University, Beijing 100048, China
| | - Dandan Liu
- Department of Pathology, The Fourth Medical Center of PLA General Hospital, Beijing 100048, China
| | - Xinxin Ren
- Department of Clinical Laboratory, The Fourth Medical Center of PLA General Hospital, Beijing 100048, China
| | - You Nie
- Department of Pathology, The Fourth Medical Center of PLA General Hospital, Beijing 100048, China
| | - Yibing Zhao
- Department of Oncology, The Fourth Medical Center of PLA General Hospital, Beijing 100048, China
| | - Ruyu Chen
- Department of Pathology, Fourth Medical Center, General Hospital of Chinese People’s Liberation Army, Jinzhou Medical University, Beijing 100048, China
| | - Hongwei Wang
- Department of Pathology, The Fourth Medical Center of PLA General Hospital, Beijing 100048, China,Hongwei Wang.
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Jayakumar T, Yang CM, Yen TL, Hsu CY, Sheu JR, Hsia CW, Manubolu M, Huang WC, Hsieh CY, Hsia CH. Anti-Inflammatory Mechanism of An Alkaloid Rutaecarpine in LTA-Stimulated RAW 264.7 Cells: Pivotal Role on NF-κB and ERK/p38 Signaling Molecules. Int J Mol Sci 2022; 23:ijms23115889. [PMID: 35682568 PMCID: PMC9180084 DOI: 10.3390/ijms23115889] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 02/04/2023] Open
Abstract
Lipoteichoic acid (LTA) is a key cell wall component and virulence factor of Gram-positive bacteria. LTA contributes a major role in infection and it mediates inflammatory responses in the host. Rutaecarpine, an indolopyridoquinazolinone alkaloid isolated from Evodia rutaecarpa, has shown a variety of fascinating biological properties such as anti-thrombotic, anticancer, anti-obesity and thermoregulatory, vasorelaxing activity. It has also potent effects on the cardiovascular and endocrine systems. Herein, we investigated rutaecarpine’s (Rut) anti-inflammatory effects in LTA-stimulated RAW macrophage cells. The Western blot and spectrophotometric results revealed that Rut inhibited the production of nitric oxide (NO) and the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and interleukin (IL)-1β in the LTA-induced macrophage cells. Successively, our mechanistic studies publicized that Rut inhibited LTA-induced phosphorylation of mitogen-activated protein kinase (MAPK) including the extracellular signal-regulated kinase (ERK), and p38, but not c-Jun NH2-terminal kinase (JNK). In addition, the respective Western blot and confocal image analyses exhibited that Rut reserved nuclear transcription factor kappa-B (NF-κB) by hindering inhibitor of nuclear factor κB-α (IκBα) and NF-κB p65 phosphorylation and p65 nuclear translocation. These results indicate that Rut exhibits its anti-inflammatory effects mainly through attenuating NF-κB and ERK/p38 signaling pathways. Overall, this result suggests that Rut could be a potential therapeutic agent for the treatment of Gram-positive bacteria induced inflammatory diseases.
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Affiliation(s)
- Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
| | - Chun-Ming Yang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
- Department of Neurology, Chi Mei Medical Center, Tainan 710, Taiwan
| | - Ting-Lin Yen
- Department of Medical Research, Cathay General Hospital, Taipei 106, Taiwan;
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Chia-Yuan Hsu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Chih-Wei Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
| | - Manjunath Manubolu
- Department of Evolution, Ecology and Organismal Biology, Ohio State University, Columbus, OH 43212, USA;
| | - Wei-Chieh Huang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
| | - Cheng-Ying Hsieh
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: (C.-Y.H.); (C.-H.H.)
| | - Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan; (T.J.); (C.-M.Y.); (C.-Y.H.); (J.-R.S.); (C.-W.H.); (W.-C.H.)
- Translational Medicine Center, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 111, Taiwan
- Correspondence: (C.-Y.H.); (C.-H.H.)
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Rangel TP, Reis AA, Caponi L, Pena LCS, Ruiz KGS, Santamaria MP, Mathias-Santamaria IF, Casati MZ, Casarin RCV. Subgingival endotoxin and lipoteichoic acid modulate cytokine production in diabetic subjects: A Case-control Study. Oral Dis 2020; 27:1325-1333. [PMID: 33012042 DOI: 10.1111/odi.13661] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/19/2020] [Accepted: 09/22/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Periodontal disease and diabetes mellitus (DM) are highly prevalent and interrelated diseases, resulting in altered host response microbiota. Thus, this study aimed to evaluate the impact of DM on local levels of lipopolysaccharide (LPS) and lipoteichoic acid (LTA) and their relationship with cytokines and matrix metalloproteinases' (MMPs) profile. METHODS This case-control study included diabetic (n = 15) and non-diabetic (n = 15) subjects presenting Stage 3-4, Grade C, Periodontitis. Gingival crevicular fluid (GCF) was collected, and LPS and LTA levels were analyzed by enzyme-linked immunosorbent assay (ELISA), while IFN-γ, IL-10, IL-17, IL-1β, IL-4, MMP-2, and MMP-9 were measured by LUMINEX/MAGpix. Mann-Whitney and Spearman's correlation tests were used to compared and to correlate variables (p < 0.05). RESULTS Higher levels of LTA, LPS, IL-10, IL-1β, and MMP-2 (p < 0.05) and lower levels of IL-17 were found in the DM group (p < 0.05). Non-diabetic subjects presented higher LPS, IFN-γ, IL-17, and MMP-2 levels and lower IL-10 concentration (p < 0.05). No significant correlation was seen between LPS and cytokine profile in non-diabetic. Local levels of LTA were positively correlated with IL-17 and MMP-2 and negatively with IL-10. CONCLUSION LTA and LPS drove the inflammatory profile through the modulation of cytokines and MMPs in a different manner in DM and non-diabetic subjects.
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Affiliation(s)
- Thiago P Rangel
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Aurelio A Reis
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Lara Caponi
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Larissa C S Pena
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Karina G S Ruiz
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Mauro P Santamaria
- Division of Periodontology, FOSJC, College of Dentistry, São Paulo State University, São Paulo, Brazil
| | | | - Marcio Z Casati
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
| | - Renato C V Casarin
- Department of Prosthodontics and Periodontics, Dental School of Piracicaba, Campinas State University, Campinas, Brazil
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Hulina-Tomašković A, Grdić Rajković M, Jelić D, Bosnar M, Sladoljev L, Žanić Grubišić T, Rumora L. Pro-inflammatory effects of extracellular Hsp70 on NCI-H292 human bronchial epithelial cell line. Int J Exp Pathol 2019; 100:320-329. [PMID: 31828837 DOI: 10.1111/iep.12335] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/16/2019] [Accepted: 08/14/2019] [Indexed: 12/12/2022] Open
Abstract
Extracellular Hsp70 (eHsp70) exerts its biological actions via Toll-like receptors 2 and 4, and is increased in sera of chronic obstructive pulmonary disease (COPD) patients. The aim of this study was to explore the pro-inflammatory effects and cytotoxicity of eHsp70 alone and in combination with bacterial components lipoteichoic acid (LTA) and lipopolysaccharide (LPS) on NCI-H292 airway epithelial cells. NCI-H292 cells were treated with recombinant human Hsp70 protein (rhHsp70), LPS, LTA and their combinations for 4, 12, 24 and 48 hours. IL-6, IL-8 and TNF-α levels were measured by an ELISA method. Cell viability was determined by the MTS method, and caspase-3/7, caspase-8 and caspase-9 assays. rhHsp70 induced secretion of IL-6 and IL-8 in a concentration- and time-dependent manner, with the highest secretion at 24 hours. rhHsp70 combined with LTA had antagonistic and with LPS synergistic effect on IL-6 secretion, while the interactions between rhHsp70 and LPS or LTA on IL-8 were synergistic. TNF-α was not detected in the applied conditions. rhHsp70, LPS or LTA did not affect cell viability, and rhHsp70 even suppressed caspase-3/7 activities. We suggest that pro-inflammatory effects of eHsp70, together with other damaging molecules and/or COPD risk factors, might contribute to the aggravation of chronic inflammation in human bronchial epithelium.
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Affiliation(s)
- Andrea Hulina-Tomašković
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
| | - Marija Grdić Rajković
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
| | | | | | - Lucija Sladoljev
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
| | - Tihana Žanić Grubišić
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
| | - Lada Rumora
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
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Dai H, Jia G, Wang W, Liang C, Han S, Chu M, Mei X. Genistein inhibited ammonia induced astrocyte swelling by inhibiting NF-κB activation-mediated nitric oxide formation. Metab Brain Dis 2017; 32:841-848. [PMID: 28255863 DOI: 10.1007/s11011-017-9975-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 02/15/2017] [Indexed: 11/27/2022]
Abstract
Our previous study has indicated the involvement of epidermal growth factor receptor (EGFR) transactivation in ammonia-induced astrocyte swelling, which represents a major pathogenesis of brain edema in hepatic encephalopathy. In this study, we examined the effect of genistein, a naturally occurred broad-spectrum protein tyrosine kinase (PTK) inhibitor, on ammonia-induced cell swelling. We found that genistein pretreatment significantly prevented ammonia-induced astrocyte swelling. Mechanistically, ammonia triggered EGFR/extracellular signal-regulated kinase (ERK) association and subsequent ERK phosphorylation were alleviated by genistein pretreatment. Moreover, ammonia-induced NF-κB nuclear location, iNOS expression, and consequent NO production were all prevented by AG1478 and genistein pretreatment. This study suggested that genistein could alleviate ammonia-induced astrocyte swelling, which may be, at least partly, related to its PTK-inhibiting activity and repression of NF-κB mediated iNOS-derived NO accumulation.
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Affiliation(s)
- Hongliang Dai
- School of Nursing, Jinzhou Medical University, No. 40, Section 3, Songpo Road, Jinzhou, Liaoning, 121001, China.
| | - Guizhi Jia
- Department of Physiology, Jinzhou Medical University, Jinzhou, Liaoning, 121001, People's Republic of China.
| | - Wei Wang
- Department of Orthopedics, First Affiliated Hospital, Jinzhou Medical University, Jinzhou, Liaoning, 121001, People's Republic of China
| | - Chunguang Liang
- School of Nursing, Jinzhou Medical University, No. 40, Section 3, Songpo Road, Jinzhou, Liaoning, 121001, China
| | - Siyu Han
- School of Nursing, Jinzhou Medical University, No. 40, Section 3, Songpo Road, Jinzhou, Liaoning, 121001, China
| | - Minghui Chu
- School of Nursing, Jinzhou Medical University, No. 40, Section 3, Songpo Road, Jinzhou, Liaoning, 121001, China
| | - Xifan Mei
- Department of Orthopedics, First Affiliated Hospital, Jinzhou Medical University, Jinzhou, Liaoning, 121001, People's Republic of China.
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9
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Yao L, Zhao H, Tang H, Xiong J, Zhao W, Liu L, Dong H, Zou F, Cai S. Blockade of β-catenin signaling attenuates toluene diisocyanate-induced experimental asthma. Allergy 2017; 72:579-589. [PMID: 27624805 DOI: 10.1111/all.13045] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2016] [Indexed: 01/22/2023]
Abstract
BACKGROUND Aberrant activation of β-catenin signaling by both WNT-dependent and WNT-independent pathways has been demonstrated in asthmatic airways, which is thought to contribute critically in remodeling of the airways. Yet, the exact role of β-catenin in asthma is very poorly defined. As we have previously reported abnormal expression of β-catenin in a toluene diisocyanate (TDI)-induced asthma model, in this study, we evaluated the therapeutic efficacy of two small molecules XAV-939 and ICG-001 in TDI-asthmatic male BALB/c mice, which selectively block β-catenin-mediated transcription. METHODS Male BALB/c mice were sensitized and challenged with TDI to generate a chemically induced asthma model. Inhibitors of β-catenin, XAV-939, and ICG-001 were respectively given to the mice through intraperitoneally injection. RESULTS TDI exposure led to a significantly increased activity of β-catenin, which was then confirmed by a luciferase assay in 16HBE transfected with the TOPFlash reporter plasmid. Treatment with either XAV-939 or ICG-001 effectively inhibited activation of β-catenin and downregulated mRNA expression of β-catenin-targeted genes in TDI-asthmatic mice, paralleled by dramatically attenuated TDI-induced hyperresponsiveness and inflammation of the airway, alleviated airway goblet cell metaplasia and collagen deposition, decreased Th2 inflammation, as well as lower levels of TGFβ1, VEGF, HMGB1, and IL-1β. CONCLUSION The results showed that β-catenin is a principal mediator of TDI-induced asthma, proposing β-catenin as a promising therapeutic target in asthma.
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Affiliation(s)
- L. Yao
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - H. Zhao
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - H. Tang
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - J. Xiong
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - W. Zhao
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - L. Liu
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - H. Dong
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
| | - F. Zou
- School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou China
| | - S. Cai
- Department of Respiratory and Critical Care Medicine; Chronic Airways Diseases Laboratory; Nanfang Hospital; Southern Medical University; Guangzhou China
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