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Piacentini R, Grassi C. Interleukin 1β receptor and synaptic dysfunction in recurrent brain infection with Herpes simplex virus type-1. Neural Regen Res 2025; 20:416-423. [PMID: 38819045 PMCID: PMC11317954 DOI: 10.4103/nrr.nrr-d-23-01690] [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: 10/11/2023] [Revised: 02/21/2024] [Accepted: 03/21/2024] [Indexed: 06/01/2024] Open
Abstract
Several experimental evidence suggests a link between brain Herpes simplex virus type-1 infection and the occurrence of Alzheimer's disease. However, the molecular mechanisms underlying this association are not completely understood. Among the molecular mediators of synaptic and cognitive dysfunction occurring after Herpes simplex virus type-1 infection and reactivation in the brain neuroinflammatory cytokines seem to occupy a central role. Here, we specifically reviewed literature reports dealing with the impact of neuroinflammation on synaptic dysfunction observed after recurrent Herpes simplex virus type-1 reactivation in the brain, highlighting the role of interleukins and, in particular, interleukin 1β as a possible target against Herpes simplex virus type-1-induced neuronal dysfunctions.
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Affiliation(s)
- Roberto Piacentini
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
- Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Claudio Grassi
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
- Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
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2
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Sabatini A, Lucidi M, Ciolfi S, Vuotto C, De Bardi M, Visca P, Battistini L, Visaggio D, Volpe E. Innate immune mechanisms promote human response to Acinetobacter baumannii infection. Eur J Immunol 2024:e2451170. [PMID: 39072714 DOI: 10.1002/eji.202451170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 07/15/2024] [Accepted: 07/17/2024] [Indexed: 07/30/2024]
Abstract
Acinetobacter baumannii is an opportunistic Gram-negative bacterium representing one of the leading causes of ventilator-associated pneumonia. The development of pneumonia results from a complex interplay between pathogens and pulmonary innate mucosal immunity. Therefore, the knowledge of the host immune responses is pivotal for the development of effective therapeutics to treat A. baumannii infections. Previous studies were conducted using cell lines and animal models, but a comprehensive understanding of the interaction between A. baumannii and primary human immune cells is still lacking. To bridge this gap, we investigated the response of primary monocytes, macrophages, and dendritic cells to the A. baumannii-type strain and an epidemic clinical isolate. We found that all immune cells trigger different responses when interacting with A. baumannii. In particular, macrophages and monocytes mediate bacterial clearance, whereas monocytes and dendritic cells activate a late response through the production of cytokines, chemokines, and the expression of co-stimulatory molecules. The epidemic strain induces lower expression of interleukin-10 and CD80 compared with the type strain, potentially constituting two immune evasion strategies.
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Affiliation(s)
- Andrea Sabatini
- Molecular Neuroimmunology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Massimiliano Lucidi
- Department of Science, University Roma Tre, Rome, Italy
- National Biodiversity Future Center (NBFC), Palermo, Italy
| | - Serena Ciolfi
- Molecular Neuroimmunology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Claudia Vuotto
- Neuromicrobiology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Marco De Bardi
- Neuroimmunology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Paolo Visca
- Department of Science, University Roma Tre, Rome, Italy
- Molecular Microbiology and Microbiomics, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Luca Battistini
- Neuroimmunology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Daniela Visaggio
- Department of Science, University Roma Tre, Rome, Italy
- National Biodiversity Future Center (NBFC), Palermo, Italy
- Molecular Microbiology and Microbiomics, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Elisabetta Volpe
- Molecular Neuroimmunology Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
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3
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Hu Y, Zhang R, Li J, Wang H, Wang M, Ren Q, Fang Y, Tian L. Association Between Gut and Nasal Microbiota and Allergic Rhinitis: A Systematic Review. J Asthma Allergy 2024; 17:633-651. [PMID: 39006241 PMCID: PMC11246088 DOI: 10.2147/jaa.s472632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/01/2024] [Indexed: 07/16/2024] Open
Abstract
Allergic rhinitis is a chronic non-infectious inflammation of the nasal mucosa mediated by specific IgE. Recently, the human microbiome has drawn broad interest as a potential new target for treating this condition. This paper succinctly summarizes the main findings of 17 eligible studies published by February 2024, involving 1044 allergic rhinitis patients and 954 healthy controls from 5 countries. These studies examine differences in the human microbiome across important mucosal interfaces, including the nasal and intestinal areas, between patients and controls. Overall, findings suggest variations in the gut microbiota between allergic rhinitis patients and healthy individuals, although the specific bacterial taxa that significantly changed were not always consistent across studies. Due to the limited scope of existing research and patient coverage, the relationship between the nasal microbiome and allergic rhinitis remains inconclusive. The article discusses the potential immune-regulating role of the gut microbiome in allergic rhinitis. Further well-designed clinical trials with large-scale recruitment of allergic rhinitis patients are encouraged.
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Affiliation(s)
- Yucheng Hu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Rong Zhang
- Jiangsu Province Hospital of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Junjie Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Huan Wang
- Chengdu university of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Meiya Wang
- Chengdu university of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Qiuyi Ren
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Yueqi Fang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
| | - Li Tian
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, People’s Republic of China
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4
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Khongpraphan S, Ekchariyawat P, Sanongkiet S, Luangjindarat C, Sirisinha S, Ponpuak M, Midoeng P, Pudla M, Utaisincharoen P. Differentiation in pyroptosis induction by Burkholderia pseudomallei and Burkholderia thailandensis in primary human monocytes, a possible cause of sepsis in acute melioidosis patients. PLoS Negl Trop Dis 2024; 18:e0012368. [PMID: 39042701 PMCID: PMC11296640 DOI: 10.1371/journal.pntd.0012368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 08/02/2024] [Accepted: 07/12/2024] [Indexed: 07/25/2024] Open
Abstract
Melioidosis caused by Burkholderia pseudomallei is an infectious disease with a high mortality rate. In acute melioidosis, sepsis is a major cause of death among patients. Once the bacterium enters the bloodstream, immune system dysregulation ensues, leading to cytokine storms. In contrast to B. pseudomallei, a closely related but non-virulent strain B. thailandensis has rarely been reported to cause cytokine storms or death in patients. However, the mechanisms in which the virulent B. pseudomallei causes sepsis are not fully elucidated. It is well-documented that monocytes play an essential role in cytokine production in the bloodstream. The present study, therefore, determined whether there is a difference in the innate immune response to B. pseudomallei and B. thailandensis during infection of primary human monocytes and THP-1 monocytic cells by investigating pyroptosis, an inflammatory death pathway known to play a pivotal role in sepsis. Our results showed that although both bacterial species exhibited a similar ability to invade human monocytes, only B. pseudomallei can significantly increase the release of cytosolic enzyme lactate dehydrogenase (LDH) as well as the increases in caspase-1 and gasdermin D activations in both cell types. The results were consistent with the significant increase in IL-1β and IL-18 production, key cytokines involved in pyroptosis. Interestingly, there was no significant difference in other cytokine secretion, such as IL-1RA, IL-10, IL-12p70, IL-15, IL-8, and IL-23 in cells infected by both bacterial species. Furthermore, we also demonstrated that ROS production played a crucial role in controlling pyroptosis activation during B. pseudomallei infection in primary human monocytes. These findings suggested that pyroptosis induced by B. pseudomallei in the human monocytes may contribute to the pathogenesis of sepsis in acute melioidosis patients.
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Affiliation(s)
| | - Peeraya Ekchariyawat
- Department of Microbiology, Faculty of Public Health, Mahidol University, Bangkok, Thailand
| | - Sucharat Sanongkiet
- Department of Chemistry, Faculty of Science, Silpakorn University, Nakhon Pathom, Thailand
| | | | - Stitaya Sirisinha
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Marisa Ponpuak
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Panuwat Midoeng
- Division of Pathology, Army Institute of Pathology, Phramongkutklao Hospital, Bangkok, Thailand
| | - Matsayapan Pudla
- Department of Oral Microbiology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Pongsak Utaisincharoen
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Drug Discovery and Development Center, Office of Advanced Science and Technology, Thammasat University, Pathum Thani, Thailand
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5
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Ahn JH, Jung DH, Kim DY, Lee TS, Kim YJ, Lee YJ, Seo IS, Kim WG, Cho YJ, Shin SJ, Park JH. Impact of IL-1β on lung pathology caused by Mycobacterium abscessus infection and its association with IL-17 production. Microbes Infect 2024; 26:105351. [PMID: 38724000 DOI: 10.1016/j.micinf.2024.105351] [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: 02/08/2024] [Revised: 04/27/2024] [Accepted: 05/01/2024] [Indexed: 05/18/2024]
Abstract
Mycobacterium abscessus (MAB), a non-tuberculous mycobacterium (NTM), causes chronic pulmonary inflammation in humans. The NLRP3 inflammasome is a multi-protein complex that triggers IL-1β maturation and pyroptosis through the cleavage of caspase-1. In this study, we investigated the roles of NLRP3 and IL-1β in the host's defense against MAB. The IL-1β production by MAB was completely abolished in NLRP3, but not NLRC4, deficient macrophages. The NLRP3 inflammasome components, which are ASC and caspase-1 were also found to be essential for IL-1β production in response to MAB. NLRP3 and IL-1β deficiency did not affect the intracellular growth of MAB in macrophages, and the bacterial burden in lungs of NLRP3- and IL-1β-deficient mice was also comparable to the burden observed in WT mice. In contrast, IL-1β deficiency ameliorated lung pathology in MAB-infected mice. Notably, the lung homogenates of IL-1β-deficient mice had reduced levels of IL-17, but not IFN-γ and IL-4 when compared with WT counterparts. Furthermore, in vitro co-culture analysis showed that IL-1β signaling was essential for IL-17 production in response to MAB. Finally, we observed that the anti-IL-17 antibody administration moderately mitigated MAB-induced lung pathology. These findings indicated that IL-1β production contribute to MAB-induced lung pathology via the elevation of IL-17 production.
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Affiliation(s)
- Jae-Hun Ahn
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea; Department of Experimental Animal Research, Biomedical Research Institute, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Do-Hyeon Jung
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Dong-Yeon Kim
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Tae-Sung Lee
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yeong-Jun Kim
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yun-Ji Lee
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - In-Su Seo
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Wan-Gyu Kim
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Young Jin Cho
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sung Jae Shin
- Department of Microbiology, Institute for Immunology and Immunological Diseases, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Jong-Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 61186, Republic of Korea; NODCURE, INC., 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.
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6
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Jiang S, Li W, Song M, Liang J, Liu G, Du Q, Wang L, Meng H, Tang L, Yang Y, Zhang B. CXCL1-CXCR2 axis mediates inflammatory response after sciatic nerve injury by regulating macrophage infiltration. Mol Immunol 2024; 169:50-65. [PMID: 38493581 DOI: 10.1016/j.molimm.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 03/09/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
Macrophages play a crucial role in the inflammatory response following sciatic nerve injury. Studies have demonstrated that C-X-C motif chemokine (CXCL) 1 recruit macrophages by binding to C-X-C chemokine receptor (CXCR) 2 and participates in the inflammatory response of various diseases. Based on these findings, we aimed to explore the role of the CXCL1-CXCR2 axis in the repair process after peripheral nerve injury. Initially, we simulated sciatic nerve injury and observed an increased expression of CXCL1 and CXCR2 in the nerves of the injury group. Both in vivo and in vitro experiments confirmed that the heightened CXCL1 expression occurs in Schwann cells and is secreted, while the elevated CXCR2 is expressed by recruited macrophages. In addition, in vitro experiments demonstrated that the binding of CXCL1 to CXCR2 can activate the NLRP3 inflammasome and promote the production of interleukin-1 beta (IL-1β) in macrophages. However, after mice were subjected to sciatic nerve injury, the number of macrophages and the expression of inflammatory factors in the sciatic nerve were reduced following treatment with the CXCR2 inhibitor SB225002. Simultaneously, we evaluated the sciatic nerve function index, the expression of p75 neurotrophic factor receptor (p75NTR), and myelin proteins, and all of these results were improved with the use of SB225002. Thus, our results suggest that after sciatic nerve injury, the CXCL1-CXCR2 axis mediates the inflammatory response by promoting the recruitment and activation of macrophages, which is detrimental to the repair of the injured nerves. In contrast, treatment with SB225002 promotes the repair of injured sciatic nerves.
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Affiliation(s)
- Suli Jiang
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Wei Li
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Meiying Song
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Jie Liang
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Guixian Liu
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Qiaochu Du
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Luoyang Wang
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Haining Meng
- School of Emergency Medicine, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Lei Tang
- Department of Special Medicine, School of Basic Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Yanyan Yang
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China
| | - Bei Zhang
- Department of Immunology, Medical College of Qingdao University, Qingdao, Shandong Province, China.
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7
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Qian Z, Chen K, Yang L, Li C. Apoptosis-inducing factor 1 mediates Vibrio splendidus-induced coelomocyte apoptosis via importin β dependent nuclear translocation in Apostichopus japonicus. FISH & SHELLFISH IMMUNOLOGY 2024; 148:109491. [PMID: 38490346 DOI: 10.1016/j.fsi.2024.109491] [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: 01/20/2024] [Revised: 02/23/2024] [Accepted: 03/07/2024] [Indexed: 03/17/2024]
Abstract
As is well known, apoptosis is an important form of immune response and immune regulation, particularly playing a crucial role in combating microbial infections. Apoptosis-inducing factor 1 (AIF-1) is essential for apoptosis to induce chromatin condensation and DNA fragmentation via a caspase-independent pathway. The nuclear translocation of AIF-1 is a key step in apoptosis but the molecular mechanism is still unclear. In this study, the homologous gene of AIF-1, named AjAIF-1, was cloned and identified in Apostichopus japonicus. The mRNA expression of AjAIF-1 was significantly increased by 46.63-fold after Vibrio splendidus challenge. Silencing of AjAIF-1 was found to significantly inhibit coelomocyte apoptosis because the apoptosis rate of coelomocyte decreased by 0.62-fold lower compared with the control group. AjAIF-1 was able to promote coelomocyte apoptosis through nuclear translocation under the V. splendidus challenge. Moreover, AjAIF-1 and Ajimportin β were mainly co-localized around the nucleus in vivo and silencing Ajimportin β significantly inhibited the nuclear translocation of AjAIF-1 and suppressed coelomocyte apoptosis by 0.64-fold compared with control. In summary, nuclear translocation of AjAIF-1 will likely mediate coelomocyte apoptosis through an importin β-dependent pathway in sea cucumber.
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Affiliation(s)
- Zepeng Qian
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Kaiyu Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Lei Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China.
| | - Chenghua Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, PR China.
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8
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An Z, Ding W. Syntaxin17 Restores Lysosomal Function and Inhibits Pyroptosis Caused by Acinetobacter baumannii. J Microbiol 2024; 62:315-325. [PMID: 38451450 DOI: 10.1007/s12275-024-00109-0] [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: 09/08/2023] [Revised: 12/12/2023] [Accepted: 01/04/2024] [Indexed: 03/08/2024]
Abstract
Acinetobacter baumannii (A. baumannii) causes autophagy flux disorder by degrading STX17, resulting in a serious inflammatory response. It remains unclear whether STX17 can alter the inflammatory response process by controlling autolysosome function. This study aimed to explore the role of STX17 in the regulation of pyroptosis induced by A. baumannii. Our findings indicate that overexpression of STX17 enhances autophagosome degradation, increases LAMP1 expression, reduces Cathepsin B release, and improves lysosomal function. Conversely, knockdown of STX17 suppresses autophagosome degradation, reduces LAMP1 expression, augments Cathepsin B release, and accelerates lysosomal dysfunction. In instances of A. baumannii infection, overexpression of STX17 was found to improve lysosomal function and reduce the expression of mature of GSDMD and IL-1β, along with the release of LDH, thus inhibiting pyroptosis caused by A. baumannii. Conversely, knockdown of STX17 led to increased lysosomal dysfunction and further enhanced the expression of mature of GSDMD and IL-1β, and increased the release of LDH, exacerbating pyroptosis induced by A. baumannii. These findings suggest that STX17 regulates pyroptosis induced by A. baumannii by modulating lysosomal function.
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Affiliation(s)
- Zhiyuan An
- Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, People's Republic of China.
| | - Wenyi Ding
- Department of Clinical Laboratory, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital, Beijing, 100730, People's Republic of China
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Wen X, Fang G, Li H, Jiang Z, Du X, Liao Z, Liu R, Huang G, Meng F, Liao W, Zhang Z. CircIRAK3 exerts negative feedback regulation on inflammation by binding to HNRNP U and destabilizing proinflammatory cytokine mRNA in osteoarthritis and chondrogenesis. Int J Biol Macromol 2024; 256:128453. [PMID: 38016613 DOI: 10.1016/j.ijbiomac.2023.128453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/22/2023] [Accepted: 11/24/2023] [Indexed: 11/30/2023]
Abstract
Osteoarthritis (OA) is the most prevalent age-related and degenerative joint disease with limited treatment options. Previous studies have identified the therapeutic effects of mesenchymal stem cells (MSCs) therapy. Nevertheless, chronic inflammation impedes MSCs therapeutic effect. There have been reports suggesting that circular RNAs (circRNAs) are involved in OA and chondrogenesis. The combination of MSCs and circRNAs in therapies appears to be a promising option. In this study, we identified circIRAK3 as a significant regulator in cartilage degeneration and chondrogenesis through high-throughput sequencing analyses. We observed increased circIRAK3 in OA cartilage and during MSCs chondrogenesis. Knockdown of circIRAK3 resulted in excessive apoptosis, inhibited proliferation, and degradation of chondrocytes, along with the inhibition of MSCs chondrogenesis. Mechanistically, circIRAK3 bound to HNRNP U and competitively prevented its binding to IL-1β, TNFα, and IL6 mRNA, thereby promoting mRNA degradation. Notably, circIRAK3 expression in plasma increased with higher OARSI scores. Intra-articular injection of adeno-associated virus-circIRAK3 delayed cartilage degeneration and reduced inflammation in DMM mouse model. Our study highlights a compensatory regulation network of circIRAK3 in chondrocytes in response to inflammation. CircIRAK3 has the potential to serve as a new therapeutic target for OA. Furthermore, therapies targeting circIRAK3 combined with MSCs hold promise.
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Affiliation(s)
- Xingzhao Wen
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China; Department of Medicine, Solna, Karolinska Institutet, Centre for Molecular Medicine, Karolinska University Hospital, Stockholm 171 64, Sweden
| | - Guibin Fang
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Hongyi Li
- Department of Orthopaedics, Qingyuan People's Hospital/the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Zongrui Jiang
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Xue Du
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Zhuangyao Liao
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510120, China
| | - Ruonan Liu
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Guiwu Huang
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Fangang Meng
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Weiming Liao
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China
| | - Zhiqi Zhang
- Department of Joint Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, Guangdong 510080, China.
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10
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Pham L, Jiang R, Liu Z, Nguyen M, Nguyen Y, Gong Y, Bi Y, Kim HR, Kim YR, Kim G. Synthesis of 9-Cinnamyl-9 H-purine Derivatives as Novel TLR4/MyD88/NF-κB Pathway Inhibitors for Anti-inflammatory Effects. ACS Med Chem Lett 2023; 14:1839-1847. [PMID: 38116448 PMCID: PMC10726439 DOI: 10.1021/acsmedchemlett.3c00437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/28/2023] [Accepted: 11/20/2023] [Indexed: 12/21/2023] Open
Abstract
The novel 9-cinnamyl-9H-purine skeleton, inspired by resveratrol and curcumin, was developed to avoid a pan-assay interference compound (PAINS) related to invalid metabolic pancreas activity (IMPS). It replaced the phenol group with purine analogues, the building blocks of DNA and RNA. Alterations to the hydroxyl group in the cinnamyl group, such as H, Me, or F substitutions, were made to impede its oxidation to a PAINS-associated quinone. Among the compounds tested, 5e significantly inhibited nitric oxide production in LPS-induced macrophages (IC50: 6.4 vs 26.4 μM for resveratrol). 5e also reduced pro-inflammatory cytokine levels (IL-6, TNF-α, IL-1β) and lowered iNOS and COX-2 protein levels. Mechanistically, 5e disrupted the TLR4-MyD88 protein interaction, leading to the suppression of the NF-κB signaling pathway suppression. In an atopic dermatitis mouse model, 5e reduced ear edema and inflammation. These findings indicate that the novel 9-cinnamyl-9H-purine skeleton provides therapeutic insight into treating various human diseases by regulating inflammation.
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Affiliation(s)
- Linh Pham
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Rui Jiang
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Zijing Liu
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Mai Nguyen
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Yen Nguyen
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Yue Gong
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Yanran Bi
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Hong-Rae Kim
- Department
of Biomedical Sciences, College of Medicine, Korea University, Seoul 02708, Korea
| | - Young Ran Kim
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Gyudong Kim
- College
of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Korea
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11
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Maure A, Robino E, Van der Henst C. The intracellular life of Acinetobacter baumannii. Trends Microbiol 2023; 31:1238-1250. [PMID: 37487768 DOI: 10.1016/j.tim.2023.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 06/16/2023] [Accepted: 06/23/2023] [Indexed: 07/26/2023]
Abstract
Acinetobacter baumannii is a Gram-negative opportunistic bacterium responsible for nosocomial and community-acquired infections. This pathogen is globally disseminated and associated with high levels of antibiotic resistance, which makes it an important threat to human health. Recently, new evidence showed that several A. baumannii isolates can survive and proliferate within eukaryotic professional and/or nonprofessional phagocytic cells, with in vivo consequences. This review provides updated information and describes the tools that A. baumannii possesses to adhere, colonize, and replicate in host cells. Additionally, we emphasize the high genetic and phenotypic heterogeneity detected amongst A. baumannii isolates and its impact on the bacterial intracellular features. We also discuss the need for standardized methods to characterize this pathogen robustly and consequently consider some strains as facultative intracellular bacteria.
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Affiliation(s)
- Alexandra Maure
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Etienne Robino
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Charles Van der Henst
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
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12
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Nguyen M, Aslam MA, Nguyen Y, Javaid HM, Pham L, Huh JY, Kim G. Design and Synthesis of l-1'-Homologated Adenosine Derivatives as Potential Anti-inflammatory Agents. ACS OMEGA 2023; 8:36361-36369. [PMID: 37810713 PMCID: PMC10552512 DOI: 10.1021/acsomega.3c05029] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023]
Abstract
Inflammatory responses are fundamental protective warning mechanisms. However, in certain instances, they contribute significantly to the development of several chronic diseases such as cancer. Based on previous studies of truncated 1'-homologated adenosine derivatives, l-nucleosides and their nucleobase-modified quinolone analogues were designed, synthesized, and evaluated for anti-inflammatory activities. The target molecules were synthesized via the key intramolecular cyclization of monotosylate and Mitsunobu condensation from the natural product, d-ribose. All compounds tested and showed potent anti-inflammatory activities, as indicated by their inhibition of LPS-induced IL-1β secretion from the RAW 264.7 macrophages. Gene expressions of pro-inflammatory cytokines showed that all compounds, except 3a and 3b, significantly reduced LPS-induced IL-1β and IL-6 mRNA expressions. The half-maximal inhibitory concentrations (IC50) of 2g and 2h against IL-1β were 1.08 and 2.28 μM, respectively. In contrast, only 2d, 2g, and 3d effectively reversed LPS-induced TNFα mRNA expression. Our mechanistic study revealed that LPS-induced phosphorylation of NF-κB was significantly downregulated by all compounds tested, providing evidence that the NF-κB signaling pathway is involved in their anti-inflammatory activities. Among the compounds tested, 2g and 2h had the most potent anti-inflammatory effects, as shown by the extent of decrease in pro-inflammatory gene expression, protein secretion, and NF-κB phosphorylation. These findings suggest that the l-truncated 1'-homologated adenosine skeleton and its nucleobase-modified analogues have therapeutic potential as treatments for various human diseases by mediating inflammatory processes.
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Affiliation(s)
| | | | - Yen Nguyen
- College of Pharmacy and Research Institute
of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Hafiz Muhammad
Ahmad Javaid
- College of Pharmacy and Research Institute
of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Linh Pham
- College of Pharmacy and Research Institute
of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Joo Young Huh
- College of Pharmacy and Research Institute
of Drug Development, Chonnam National University, Gwangju 61186, Korea
| | - Gyudong Kim
- College of Pharmacy and Research Institute
of Drug Development, Chonnam National University, Gwangju 61186, Korea
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13
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Li Y, Liu L, Xiao C, Sun B, Luo S, Yang D, Zhang X, Huang T, Yu Z, Li X. Outer membrane protein A of Acinetobacter baumannii regulates pulmonary inflammation through the TLR2-NF-κB pathway. Vet Microbiol 2023; 284:109812. [PMID: 37343456 DOI: 10.1016/j.vetmic.2023.109812] [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: 10/01/2022] [Revised: 06/07/2023] [Accepted: 06/10/2023] [Indexed: 06/23/2023]
Abstract
Acinetobacter baumannii (A. baumannii) is characterized by a high prevalence of drug resistance; how to effectively treat it is still a major clinical challenge. Our previous experiments confirmed that ompA, which is one of the most well-characterized virulence factors, may be dependent on the caspase-1 pathway-stimulated expression of NLRP3 inflammasome to enhance inflammation. TLRs (i.e., TLR2, etc.) is the initiating signal for NLRP3 inflammasome activation; how it relates to ompA in its underlying pathogenic mechanism is not clear. In this study, we proofed that ompA promoted NLRP3 inflammasome activation while the TLR2-NF-κB pathway was also activated after A. baumannii infection. Additionally, the expression of NLRP3 inflammasome-associated proteins and genes was inhibited by silencing TLR2 and NLRP3. This indicated that ompA might depend on the TLR2-NF-κB pathway to assemble and activate the NLRP3 inflammasome. OmpA promoted the assembly of the NLRP3 inflammasome through the TLR2-NF-κB pathway and inhibited the degradation of caspase-1 by the proteasome so that a large number of mature IL-1β/IL-18 and other proinflammatory factors were released extracellularly to enhance the body's inflammatory response. Taken together, the results of the joint pre-study confirmed a novel TLR2-NF-κB/NLRP3/caspase-1-modulated mechanism underpinning ompA activity, the NLRP3 inflammasome pathway may be as a potential immunomodulatory target against A. baumannii infections.
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Affiliation(s)
- Yumei Li
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Laibing Liu
- Department of Neurosurgery, Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, China
| | - Chaolun Xiao
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Baofei Sun
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Shipeng Luo
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Dan Yang
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Xiangyan Zhang
- Department of Respiratory and Critical Medicine, Guizhou Provincial People's Hospital,Guiyang, Guiyang, Guizhou 550006, China
| | - Tao Huang
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
| | - Zijiang Yu
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China.
| | - Xiaoying Li
- Department of Anatomy, School of Basic Medical Sciences, Guizhou Medical University/ Department of Nephrology, Guiyang First People's Hospital, Guiyang, Guizhou 550025, China
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14
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Allemailem KS. Enhanced activity of Ellagic acid in lipid nanoparticles (EA-liposomes) against Acinetobacter baumannii in immunosuppressed mice. Saudi J Biol Sci 2023; 30:103707. [PMID: 37415860 PMCID: PMC10319833 DOI: 10.1016/j.sjbs.2023.103707] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/03/2023] [Accepted: 06/09/2023] [Indexed: 07/08/2023] Open
Abstract
Acinetobacter baumannii infections have come to the surface in huge numbers in the recent decades. Furthermore, A. baumannii has adopted great ability to nullify the majority of currently available antibiotics. With the purpose of finding a nontoxic and efficient therapeutic agent, we analyzed the activity of Ellagic acid (EA) against the multidrug-resistant A. baumannii. EA not only demonstrated its activity against A. baumannii, but also inhibited the biofilm formation. Since EA shows poor solubility in an aqueous environment, a lipid nanoparticle-based (liposomal) formulation of EA (EA-liposomes) was prepared and its effectiveness was assessed to treat bacterial infection in the immunocompromised murine model. Therapy with EA-liposomes imparted greater protection to infected mice by increasing the survival and decreasing the bacterial load in the lungs. A. baumannii infected mice treated with EA-liposomes (100 mg/kg) showed 60% survival rate as compared to 20% of those treated with free EA at the same dose. The bacterial load was found to be 32778 ± 12232 in the lungs of EA-liposomes (100 mg/kg)-treated mice, which was significantly lower to 165667 ± 53048 in the lung tissues of free EA treated mice. Likewise, EA-liposomes also restored the liver function (AST and ALT) and kidney function parameters (BUN and creatinine). The broncho-alveolar fluid (BALF) from infected mice contained greater quantities of IL-6, IL-1β and TNF-α, which were significantly alleviated in EA-liposomes treated mice. These findings together support the possible implication of EA-liposomes to treat A. baumannii infection, especially in immunocompromised mice.
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15
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Che Y, Wang N, Ma Q, Liu J, Xu Z, Li Q, Wang J, Sun Y. Microbial characterization of the nasal cavity in patients with allergic rhinitis and non-allergic rhinitis. Front Cell Infect Microbiol 2023; 13:1166389. [PMID: 37180436 PMCID: PMC10166850 DOI: 10.3389/fcimb.2023.1166389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/03/2023] [Indexed: 05/16/2023] Open
Abstract
Introduction Although recent studies have shown that the human microbiome is involved in the pathogenesis of allergic diseases, the impact of microbiota on allergic rhinitis (AR) and non-allergic rhinitis (nAR) has not been elucidated. The aim of this study was to investigate the differences in the composition of the nasal flora in patients with AR and nAR and their role in the pathogenesis. Method From February to September 2022, 35 AR patients and 35 nAR patients admitted to Harbin Medical University's Second Affiliated Hospital, as well as 20 healthy subjects who underwent physical examination during the same period, were subjected to 16SrDNA and metagenomic sequencing of nasal flora. Results The microbiota composition of the three groups of study subjects differs significantly. The relative abundance of Vibrio vulnificus and Acinetobacter baumanni in the nasal cavity of AR patients was significantly higher when compared to nAR patients, while the relative abundance of Lactobacillus murinus, Lactobacillus iners, Proteobacteria, Pseudomonadales, and Escherichia coli was lower. In addition, Lactobacillus murinus and Lacttobacillus kunkeei were also negatively correlated with IgE, while Lacttobacillus kunkeei was positively correlated with age. The relative distribution of Faecalibacterium was higher in moderate than in severe AR patients. According to KEGG functional enrichment annotation, ICMT(protein-S-isoprenylcysteine O-methyltransferase,ICMT) is an AR microbiota-specific enzyme that plays a role, while glycan biosynthesis and metabolism are more active in AR microbiota. For AR, the model containing Parabacteroides goldstemii, Sutterella-SP-6FBBBBH3, Pseudoalteromonas luteoviolacea, Lachnospiraceae bacterium-615, and Bacteroides coprocola had the highest the area under the curve (AUC), which was 0.9733(95%CI:0.926-1.000) in the constructed random forest prediction model. The largest AUC for nAR is 0.984(95%CI:0.949-1.000) for the model containing Pseudomonas-SP-LTJR-52, Lachnospiraceae bacterium-615, Prevotella corporis, Anaerococcus vaginalis, and Roseburia inulinivorans. Conclusion In conclusion, patients with AR and nAR had significantly different microbiota profiles compared to healthy controls. The results suggest that the nasal microbiota may play a key role in the pathogenesis and symptoms of AR and nAR, providing us with new ideas for the treatment of AR and nAR.
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Affiliation(s)
| | | | | | | | | | | | | | - Yanan Sun
- *Correspondence: Jingting Wang, ; Yanan Sun,
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16
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Infection and Immunity. Clin Immunol 2023. [DOI: 10.1016/b978-0-12-818006-8.00007-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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17
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Glycosphingolipids (GSLs) from Sphingomonas paucimobilis Increase the Efficacy of Liposome-Based Nanovaccine against Acinetobacter baumannii-Associated Pneumonia in Immunocompetent and Immunocompromised Mice. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227790. [PMID: 36431892 PMCID: PMC9695853 DOI: 10.3390/molecules27227790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
Due to the high propensity of drug resistance in Acinetobacter baumannii, the number of currently available therapeutic drugs has become very limited. Thus, it becomes incredibly important to prepare an effective vaccine formulation capable of eliciting an effective immune response against A. baumannii. In this study, we prepared a liposomal vaccine formulation bearing glycosphingolipids (GSLs) from Sphingomonas paucimobilis and loaded with the whole cell antigen (WCAgs-GSLs-liposomes) of A. baumannii. The immune-stimulating potential and prophylactic efficacy of WCAgs-GSLs-liposomes were compared with those of WCAgs-liposomes (without GSLs) or free WCAgs in both immunocompetent and immunodeficient mice. The efficacy of vaccine formulations was determined by analyzing antibody titer, cytokine levels, and survival studies in the immunized mice. The findings revealed that vaccination with WCAgs-GSLs-liposomes stimulated a greater secretion of antibodies and cytokines, higher lymphocyte proliferation, and increased expression of the co-stimulatory molecules. Anti-sera from WCAgs-GSLs-liposomes-immunized mice remarkably reduced the biofilm formation by A. baumannii. Most importantly, WCAgs-GSLs-liposomes-vaccinated mice demonstrated a higher defiance against the pathogen, as compared to the immunizations with WCAgs-liposomes (without GSLs) or free WCAgs. Immunocompetent mice immunized with WCAgs-GSLs-liposomes showed a 100% survival rate, while those immunized with WCAgs-liposomes exhibited a 60% survival rate. The protective effect of WCAgs-GSLs-liposomes was also found to be higher in immunocompromised mice, as the immunized mice showed a 50% survival rate, which was greater than the 20% survival rate of those immunized with WCAgs-liposomes. The survival data was also supported by the findings of bacterial load and histological analysis that substantiated the greatest prophylactic potential of the WCAgs-GSLs-liposomes. These findings recommend that WCAgs-GSLs-liposomes may be reckoned as a prospective vaccine to protect the persons against A. baumannii infection.
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18
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Li FJ, Starrs L, Mathur A, Ishii H, Man SM, Burgio G. Differential activation of NLRP3 inflammasome by Acinetobacter baumannii strains. PLoS One 2022; 17:e0277019. [PMID: 36318583 PMCID: PMC9624416 DOI: 10.1371/journal.pone.0277019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 10/17/2022] [Indexed: 11/07/2022] Open
Abstract
Acinetobacter baumannii is an emerging nosocomial, opportunistic pathogen with growing clinical significance globally. A. baumannii has an exceptional ability to rapidly develop drug resistance. It is frequently responsible for ventilator-associated pneumonia in clinical settings and inflammation resulting in severe sepsis. The inflammatory response is mediated by host pattern-recognition receptors and the inflammasomes. Inflammasome activation triggers inflammatory responses, including the secretion of the pro-inflammatory cytokines IL-1β and IL-18, the recruitment of innate immune effectors against A. baumannii infection, and the induction programmed cell death by pyroptosis. An important knowledge gap is how variation among clinical isolates affects the host’s innate response and activation of the inflammasome during A. baumannii infection. In this study, we compared nine A. baumannii strains, including clinical locally-acquired isolates, in their ability to induce activation of the inflammasome and programmed cell death in primary macrophages, epithelial lung cell line and mice. We found a variation in survival outcomes of mice and bacterial dissemination in organs among three commercially available A. baumannii strains, likely due to the differences in virulence between strains. Interestingly, we found variability among A. baumannii strains in activation of the NLRP3 inflammasome, non-canonical Caspase-11 pathway, plasmatic secretion of the pro-inflammatory cytokine IL-1β and programmed cell death. Our study highlights the importance of utilising multiple bacterial strains and clinical isolates with different virulence to investigate the innate immune response to A. baumannii infection.
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Affiliation(s)
- Fei-Ju Li
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Lora Starrs
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Anukriti Mathur
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Hikari Ishii
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Si Ming Man
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Gaetan Burgio
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
- * E-mail:
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19
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Dong M, Liu H, Cao T, Li L, Sun Z, Qiu Y, Wang D. Huoxiang Zhengqi alleviates azoxymethane/dextran sulfate sodium-induced colitis-associated cancer by regulating Nrf2/NF-κB/NLRP3 signaling. Front Pharmacol 2022; 13:1002269. [PMID: 36339623 PMCID: PMC9634060 DOI: 10.3389/fphar.2022.1002269] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/10/2022] [Indexed: 11/20/2022] Open
Abstract
Colitis-associated cancer (CAC) is a subtype of inflammatory bowel disease (IBD)-associated colorectal cancer. Huoxiang Zhengqi (HXZQ) is a classical Chinese herbal medicine and has been used to treat intestinal disorders, however, anti-CAC effects and underlying mechanisms of HXZQ have not been reported. An azoxymethane/dextran sulfate sodium-induced CAC mice model was used to investigate the anti-CAC effect of HXZQ. HXZQ significantly reduced colonic inflammation, suppressed the size and number of tumors, and reduced the levels of pro-inflammatory cytokines (interleukin [IL]-1α, IL-1β, IL-6, IL-17A, IL-21, IL-23, granulocyte macrophage-colony stimulating factor, and tumor necrosis factor-α) and oxidative stress markers (reactive oxygen species and malondialdehyde), and increased the levels of anti-inflammatory cytokines (IL-10 and IL-27) in CAC mice. Intestinal microbiota and serum metabolomics analyses indicated that HXZQ altered the gut microbial composition and the abundance of 29 serum metabolites in CAC mice. Additionally, HXZQ activated the nuclear factor-erythroid factor 2-related factor 2 (Nrf2) signaling pathway and increased the levels of antioxidants such as catalase (CAT), heme oxygenase-1 (HO-1), NAD(P)H quinone oxidoreductases-1 (NQO-1), and superoxide dismutase-1 (SOD-1). HXZQ inhibited the activation of the nuclear factor kappa-B (NF-κB) signaling pathway and decreased the expression of NLR family pyrin domain containing 3 (NLRP3) by inhibiting the phosphorylation of inhibitor of nuclear factor kappa-B (IκB), inhibitor of nuclear factor kappa-B kinase (IKK), and NF-κB. In conclusion, HXZQ alleviated CAC in mice by modulating the intestinal microbiota and metabolism, activating Nrf2-mediated antioxidant response, and inhibiting NF-κB-mediated NLRP3 inflammasome activation against inflammation. The present data provide a reference for the use of HXZQ as a therapeutic or combination agent for clinical CAC treatment.
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Affiliation(s)
- Mingyuan Dong
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China
- School of Life Sciences, Jilin University, Changchun, China
| | - Honghan Liu
- School of Life Sciences, Jilin University, Changchun, China
| | - Tianjiao Cao
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Lanzhou Li
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China
- School of Life Sciences, Jilin University, Changchun, China
- Engineering Research Center of Chinese Ministry of Education ford Eible and Medicinal Fungi, Jilin Agricultural University, Changchun, China
| | - Zhen Sun
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China
- School of Life Sciences, Jilin University, Changchun, China
| | - Ye Qiu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China
| | - Di Wang
- School of Life Sciences, Jilin University, Changchun, China
- Engineering Research Center of Chinese Ministry of Education ford Eible and Medicinal Fungi, Jilin Agricultural University, Changchun, China
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Cathepsin L-containing exosomes from α-synuclein-activated microglia induce neurotoxicity through the P2X7 receptor. NPJ Parkinsons Dis 2022; 8:127. [PMID: 36202834 PMCID: PMC9537534 DOI: 10.1038/s41531-022-00394-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 09/09/2022] [Indexed: 11/08/2022] Open
Abstract
Uncontrolled microglial activation is pivotal to the pathogenesis of Parkinson's disease (PD), which can secrete Cathepsin L (CTSL) to affect the survival of neurons in the PD patients; however, the precise mechanism has yet to be determined. We demonstrated for the first time that CTSL was mostly released by exosomes derived from α-Syn-activated microglia, resulting in neuronal damage and death. The elevation of CTSL activity was blocked by GW4869, suggesting a critical role for exosomes in mediating CTSL release. Furthermore, the P2X7R/PI3K/AKT signalling pathway was identified as the underlying molecular mechanism since specific antagonists of this signalling pathway, P2X7R knockdown and exosome release inhibitors significantly reduced the injury to cultured mouse cortical neurons. Our study suggests that increased extracellular release of CTSL from α-Syn-activated microglia through exosomes amplifies and aggravates of the neurotoxic effect of microglia, implying that CTSL may be involved in a fresh mechanism of PD pathogenesis, and serve as a potential biomarker and a target for PD drug development.
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21
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Liu Z, Xu W. Neutrophil and Macrophage Response in Acinetobacter Baumannii Infection and Their Relationship to Lung Injury. Front Cell Infect Microbiol 2022; 12:890511. [PMID: 35873147 PMCID: PMC9298752 DOI: 10.3389/fcimb.2022.890511] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/08/2022] [Indexed: 11/25/2022] Open
Abstract
Acinetobacter baumannii (AB) infection has become a threat to global public health. AB is one of the main pathogens causing nosocomial infections, especially ventilator-associated pneumonia. AB easily develops resistance against a variety of antibiotics, which makes the treatment of AB infections difficult. Therefore, it is necessary to study new treatment plans like anti-infection immunity. Both animal models of AB infection and in vitro cell experiments show that macrophages are activated in the early stage of the immune response and regulate the recruitment of neutrophils, thus playing a role in clearing AB. AB components and the immune responses they induce can lead to injury of the infected organ, mostly in the lungs. Understanding the response of innate immunity to ABs at different stages after infection and the relationship between the response and lung injury can help to develop new immunotherapy methods and prevent lung injury. This article provides a comprehensive review of the response of neutrophils and macrophages to AB infection and their association with lung injury to develop effective therapies for AB infection and prevent lung injury.
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Affiliation(s)
- Zhaojun Liu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, China
| | - Wei Xu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, China
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22
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Khandekar D, Dahunsi DO, Manzanera Esteve IV, Reid S, Rathmell JC, Titze J, Tiriveedhi V. Low-Salt Diet Reduces Anti-CTLA4 Mediated Systemic Immune-Related Adverse Events while Retaining Therapeutic Efficacy against Breast Cancer. BIOLOGY 2022; 11:810. [PMID: 35741331 PMCID: PMC9219826 DOI: 10.3390/biology11060810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/14/2022] [Accepted: 05/23/2022] [Indexed: 11/16/2022]
Abstract
Immune checkpoint inhibitor (ICI) therapy has revolutionized the breast cancer treatment landscape. However, ICI-induced systemic inflammatory immune-related adverse events (irAE) remain a major clinical challenge. Previous studies in our laboratory and others have demonstrated that a high-salt (HS) diet induces inflammatory activation of CD4+T cells leading to anti-tumor responses. In our current communication, we analyzed the impact of dietary salt modification on therapeutic and systemic outcomes in breast-tumor-bearing mice following anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA4) monoclonal antibody (mAb) based ICI therapy. As HS diet and anti-CTLA4 mAb both exert pro-inflammatory activation of CD4+T cells, we hypothesized that a combination of these would lead to enhanced irAE response, while low-salt (LS) diet through blunting peripheral inflammatory action of CD4+T cells would reduce irAE response. We utilized an orthotopic murine breast tumor model by injecting Py230 murine breast cancer cells into syngeneic C57Bl/6 mice. In an LS diet cohort, anti-CTLA4 mAb treatment significantly reduced tumor progression (day 35, 339 ± 121 mm3), as compared to isotype mAb (639 ± 163 mm3, p < 0.05). In an HS diet cohort, treatment with anti-CTLA4 reduced the survival rate (day 80, 2/15) compared to respective normal/regular salt (NS) diet cohort (8/15, p < 0.05). Further, HS plus anti-CTLA4 mAb caused an increased expression of inflammatory cytokines (IFNγ and IL-1β) in lung infiltrating and peripheral circulating CD4+T cells. This inflammatory activation of CD4+T cells in the HS plus anti-CTLA4 cohort was associated with the upregulation of inflammasome complex activity. However, an LS diet did not induce any significant irAE response in breast-tumor-bearing mice upon treatment with anti-CTLA4 mAb, thus suggesting the role of high-salt diet in irAE response. Importantly, CD4-specific knock out of osmosensitive transcription factor NFAT5 using CD4cre/creNFAT5flox/flox transgenic mice caused a downregulation of high-salt-mediated inflammatory activation of CD4+T cells and irAE response. Taken together, our data suggest that LS diet inhibits the anti-CTLA4 mAb-induced irAE response while retaining its anti-tumor efficacy.
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Affiliation(s)
- Durga Khandekar
- Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, USA;
| | - Debolanle O. Dahunsi
- Department Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; (D.O.D.); (J.C.R.)
| | | | - Sonya Reid
- Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA;
| | - Jeffrey C. Rathmell
- Department Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; (D.O.D.); (J.C.R.)
| | - Jens Titze
- Program in Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore 169857, Singapore;
- Division of Nephrology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Venkataswarup Tiriveedhi
- Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, USA;
- Division of Pharmacology, Vanderbilt University, Nashville, TN 37240, USA
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Chai L, Wang Q, Si C, Gao W, Zhang L. Potential Association Between Changes in Microbiota Level and Lung Diseases: A Meta-Analysis. Front Med (Lausanne) 2022; 8:723635. [PMID: 35096850 PMCID: PMC8795898 DOI: 10.3389/fmed.2021.723635] [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: 06/28/2021] [Accepted: 12/14/2021] [Indexed: 11/27/2022] Open
Abstract
Objective: Lung microbiota is increasingly implicated in multiple types of respiratory diseases. However, no study has drawn a consistent conclusion regarding the relationship between changes in the microbial community and lung diseases. This study verifies the association between microbiota level and lung diseases by performing a meta-analysis. Methods: Literature databases, including PubMed, ISI Web of Science, Embase, Google Scholar, PMC, and CNKI, were used to collect related articles published before March 20, 2021. The standard mean deviation (SMD) and related 95% confidence intervals (CIs) were calculated using a random-effects model. Subgroup, sensitivity, and publication bias analyses were also conducted. Results: Six studies, comprising 695 patients with lung diseases and 176 healthy individuals, were included in this meta-analysis. The results indicated that the microbiota level was higher in patients with lung diseases than in healthy individuals (SMD = 0.39, 95% CI = 0.22–0.55, I2 = 91.5%, P < 0.01). Subgroup analysis based on country demonstrated that the microbiota level was significantly higher in Chinese (SMD = 1.90, 95% CI = 0.87–2.93, I2 = 62.3%, P < 0.01) and Korean (SMD = 0.24, 95% CI = 0.13–0.35, I2 = 78.7%, P < 0.01) patients with lung diseases. The microbiota level of patients with idiopathic pulmonary fibrosis (IPF) (SMD = 1.40, 95% CI = 0.42–2.38, I2 = 97.3%, P = 0.005), chronic obstructive pulmonary disease (COPD) (SMD = 0.30, 95% CI = 0.09–0.50, I2 = 83.9%, P = 0.004), and asthma (SMD = 0.19, 95% CI = 0.06–0.32, I2 = 69.4%, P = 0.004) were significantly higher than those of the healthy group, whereas a lower microbiota level was found in patients with chronic hypersensitivity pneumonitis (CHP). The microbiota level significantly increased when the disease sample size was >50. Subgroup analysis based on different microbiota genera, indicated that Acinetobacter baumannii and Pseudomonas aeruginosa were significantly increased in COPD and asthma diseases. Conclusion: We observed that patients with IPF, COPD, and asthma had a higher microbiota level, whereas patients with CHP had a lower microbiota level compared to the healthy individuals. The level of A. baumannii and P. aeruginosa were significantly higher in patients with COPD and asthma, and thus represented as potential microbiota markers in the diagnosis and treatment of lung diseases.
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Affiliation(s)
- Lan Chai
- Department of Rheumatology and Immunology Department, Zhejiang Hospital, Hangzhou, China
| | - Qi Wang
- College of Pharmacy, Harbin Medical University-Daqing, Daqing, China
| | - Caijuan Si
- Department of Nutrition, Zhejiang Hospital, Hangzhou, China
| | - Wenyan Gao
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Institute of Materia Medica, Zhejiang Academy of Medical Sciences and Hangzhou Medical College, Hangzhou, China
- *Correspondence: Wenyan Gao
| | - Lun Zhang
- Department of Nutrition, Zhejiang Hospital, Hangzhou, China
- Lun Zhang
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24
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Hursitoglu M, Isıksacan N, Erismis B, Karandere F, Kural A, Kumbasar AB, Kart Yasar K. In-vitro cytokine production and nasopharyngeal microbiota composition in the early stage of COVID-19 infection. Cytokine 2022; 149:155757. [PMID: 34763156 PMCID: PMC8570934 DOI: 10.1016/j.cyto.2021.155757] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/26/2021] [Accepted: 10/26/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND To determine and compare nasopharyngeal microbiota (NM) composition, in vitro basal (Nil tube), provoked (Mitogen tube) production of cytokines at the early stage of COVID-19. METHODS This cross-sectional study included 4 age and sex-matched study groups; group 1 (recovered COVID-19) (n = 26), group 2 (mild COVID-19) (n = 24), group 3 (severe COVID-19) (n = 25), and group 4 (healthy controls) (n = 25). The study parameters obtained from the COVID-19 (group 2, and 3) at the early phase of hospital admission. RESULTS The results from the reaserch deoicted that the Mean ± SD age was 53.09 ± 14.51 years. Some of the in vitro cytokines production was significantly different between the study groups. Some of the findinggs on cytokines depicted a significant differences between study groups were interleukin (IL)-1β Nil, IL-1β Mitogen, and their subtraction (i.e Mitogen-Nil). Regarding IL-10, and IL-17a levels, Mitogen, and Mitogen-Nil tube production levels were significantly different between the groups. Surprisingly, most of these measures were lowest in the severe COVID-19 patients' group. Using discriminant analysis effect size (LEfSe), Taxa of NM with significant abundance was determined. About 20 taxa with an LDA score > 4 were identified as candidate biomarkers. Some of these taxa showed a significant correlation with IL-1β and IL-10 Mitogen and Mitogen- Nil levels (R > 0.3 or < -0.3, p < 0.05). CONCLUSIONS The findings of this perticular study regarting the early stage of COVID-19 showed that in vitro cytokines production, studies might be more useful than the ordinary cytokines' blood level measurement. Besides, the study identified some NM species that could be candidate biomarkers in managing this infection. However, further detailed studies are needed in these fields.
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Affiliation(s)
- Mehmet Hursitoglu
- Internal Medicine Department, Basaksehir Cam & Sakura Sehir Hospital, University of Health Sciences, Istanbul, Turkey; Internal Medicine Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey.
| | - Nilgun Isıksacan
- Biochemistry Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Betul Erismis
- Internal Medicine Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Faruk Karandere
- Internal Medicine Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Alev Kural
- Biochemistry Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - A Baki Kumbasar
- Internal Medicine Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Kadriye Kart Yasar
- Clinical Microbiology and Infectious Diseases Department, Bakirkoy Dr. Sadi Konuk Training & Research Hospital, University of Health Sciences, Istanbul, Turkey
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Ren W, Rubini P, Tang Y, Engel T, Illes P. Inherent P2X7 Receptors Regulate Macrophage Functions during Inflammatory Diseases. Int J Mol Sci 2021; 23:ijms23010232. [PMID: 35008658 PMCID: PMC8745241 DOI: 10.3390/ijms23010232] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/21/2021] [Accepted: 12/21/2021] [Indexed: 12/12/2022] Open
Abstract
Macrophages are mononuclear phagocytes which derive either from blood-borne monocytes or reside as resident macrophages in peripheral (Kupffer cells of the liver, marginal zone macrophages of the spleen, alveolar macrophages of the lung) and central tissue (microglia). They occur as M1 (pro-inflammatory; classic) or M2 (anti-inflammatory; alternatively activated) phenotypes. Macrophages possess P2X7 receptors (Rs) which respond to high concentrations of extracellular ATP under pathological conditions by allowing the non-selective fluxes of cations (Na+, Ca2+, K+). Activation of P2X7Rs by still higher concentrations of ATP, especially after repetitive agonist application, leads to the opening of membrane pores permeable to ~900 Da molecules. For this effect an interaction of the P2X7R with a range of other membrane channels (e.g., P2X4R, transient receptor potential A1 [TRPA1], pannexin-1 hemichannel, ANO6 chloride channel) is required. Macrophage-localized P2X7Rs have to be co-activated with the lipopolysaccharide-sensitive toll-like receptor 4 (TLR4) in order to induce the formation of the inflammasome 3 (NLRP3), which then activates the pro-interleukin-1β (pro-IL-1β)-degrading caspase-1 to lead to IL-1β release. Moreover, inflammatory diseases (e.g., rheumatoid arthritis, Crohn’s disease, sepsis, etc.) are generated downstream of the P2X7R-induced upregulation of intracellular second messengers (e.g., phospholipase A2, p38 mitogen-activated kinase, and rho G proteins). In conclusion, P2X7Rs at macrophages appear to be important targets to preserve immune homeostasis with possible therapeutic consequences.
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Affiliation(s)
- Wenjing Ren
- International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of TCM, Chengdu 610075, China; (W.R.); (P.R.); (Y.T.)
- School of Acupunct3ure and Tuina, Chengdu University of TCM, Chengdu 610075, China
| | - Patrizia Rubini
- International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of TCM, Chengdu 610075, China; (W.R.); (P.R.); (Y.T.)
- School of Acupunct3ure and Tuina, Chengdu University of TCM, Chengdu 610075, China
| | - Yong Tang
- International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of TCM, Chengdu 610075, China; (W.R.); (P.R.); (Y.T.)
- School of Acupunct3ure and Tuina, Chengdu University of TCM, Chengdu 610075, China
| | - Tobias Engel
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, D02 YN77 Dublin, Ireland;
- FutureNeuro, SFI Research Centre for Chronic and Rare Neurological Diseases, RCSI University of Medicine and Health Sciences, D02 YN77 Dublin, Ireland
| | - Peter Illes
- International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of TCM, Chengdu 610075, China; (W.R.); (P.R.); (Y.T.)
- School of Acupunct3ure and Tuina, Chengdu University of TCM, Chengdu 610075, China
- Rudolf Boehm Institute for Pharmacology and Toxicology, University of Leipzig, 04107 Leipzig, Germany
- Correspondence:
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26
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Antimicrobial, Immunomodulatory and Anti-Inflammatory Potential of Liposomal Thymoquinone: Implications in the Treatment of Bacterial Pneumonia in Immunocompromised Mice. Biomedicines 2021; 9:biomedicines9111673. [PMID: 34829902 PMCID: PMC8615793 DOI: 10.3390/biomedicines9111673] [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: 10/04/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 11/17/2022] Open
Abstract
Acinetobacter baumannii has recently been increasing as an aggressive pathogen in immunocompromised persons. In the present study, we determined the in vitro antibacterial and anti-biofilm activity of thymoquinone (TQ) against A. baumannii. A liposomal formulation of TQ (Lip-TQ) was prepared and its therapeutic potential was investigated in the treatment of A. baumannii infection in immunocompromised mice. Leukopenia was induced in mice by injecting cyclophosphamide (CYP) at a dose of 200 mg/kg and the leukopenic mice were infected with 1 × 106 CFUs of A. baumannii. The effectiveness of free TQ or Lip-TQ against A. baumannii infection was assessed by analyzing the survival rate and bacterial burden. Moreover, the efficacy of Lip-TQ was also studied by examining the systemic inflammatory markers and the histological changes in the lung tissues. The results showed that the mice in the group treated with Lip-TQ at a dose of 10 mg/kg exhibited a 60% survival rate on day 40 post-infection, whereas all the mice treated with free TQ at the same dose died within this duration. Likewise, the lowest bacterial burden was found in the lung tissue of mice treated with Lip-TQ (10 mg/kg). Besides, Lip-TQ treatment remarkably alleviated the infection-associated inflammation, oxidative stress, and histological changes in the lung tissues. Based on the findings of the present study, we recommend considering Lip-TQ as a valuable therapeutic formulation in the treatment of A. baumannii-associated pneumonia in immunocompromised subjects.
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27
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Tanno H, Kanno E, Kurosaka S, Oikawa Y, Watanabe T, Sato K, Kasamatsu J, Miyasaka T, Ishi S, Shoji M, Takagi N, Imai Y, Ishii K, Tachi M, Kawakami K. Topical Administration of Heat-Killed Enterococcus faecalis Strain KH2 Promotes Re-Epithelialization and Granulation Tissue Formation during Skin Wound-Healing. Biomedicines 2021; 9:1520. [PMID: 34829749 PMCID: PMC8614852 DOI: 10.3390/biomedicines9111520] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/14/2021] [Accepted: 10/20/2021] [Indexed: 12/14/2022] Open
Abstract
Lactic acid bacteria (LAB) are known to have beneficial effects on immune responses when they are orally administered as bacterial products. Although the beneficial effects of LAB have been reported for the genera Lactobacillus and Lactococcus, little has been uncovered on the effects of the genus Enterococcus on skin wound-healing. In this study, we aimed to clarify the effect of heat-killed Enterococcus faecalis KH2 (heat-killed KH2) strain on the wound-healing process and to evaluate the therapeutic potential in chronic skin wounds. We analyzed percent wound closure, re-epithelialization, and granulation area, and cytokine and growth factor production. We found that heat-killed KH2 contributed to the acceleration of re-epithelialization and the formation of granulation tissue by inducing tumor necrosis factor-α, interleukin-6, basic fibroblast growth factor, transforming growth factor (TGF)-β1, and vascular endothelial growth factor production. In addition, heat-killed KH2 also improved wound closure, which was accompanied by the increased production of TGF-β1 in diabetic mice. Topical administration of heat-killed KH2 might have therapeutic potential for the treatment of chronic skin wounds in diabetes mellitus. In the present study, we concluded that heat-killed KH2 promoted skin wound-healing through the formation of granulation tissues and the production of inflammatory cytokines and growth factors.
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Affiliation(s)
- Hiromasa Tanno
- Department of Science of Nursing Practice, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Emi Kanno
- Department of Science of Nursing Practice, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Shiho Kurosaka
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Yukari Oikawa
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (Y.O.); (K.S.); (K.I.); (K.K.)
| | - Takumi Watanabe
- Bio-Lab Co., Ltd., 2-1-3 Komagawa, Hidaka-shi 350-1249, Japan;
| | - Ko Sato
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (Y.O.); (K.S.); (K.I.); (K.K.)
- Department of Intelligent Network for Infection Control, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Jun Kasamatsu
- Department of Intelligent Network for Infection Control, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
| | - Tomomitsu Miyasaka
- Division of Pathophysiology, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan;
| | - Shinyo Ishi
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Miki Shoji
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Naoyuki Takagi
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Yoshimichi Imai
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Keiko Ishii
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (Y.O.); (K.S.); (K.I.); (K.K.)
| | - Masahiro Tachi
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (S.K.); (S.I.); (M.S.); (N.T.); (Y.I.); (M.T.)
| | - Kazuyoshi Kawakami
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; (Y.O.); (K.S.); (K.I.); (K.K.)
- Department of Intelligent Network for Infection Control, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;
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28
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Liu T, Wang L, Liang P, Wang X, Liu Y, Cai J, She Y, Wang D, Wang Z, Guo Z, Bates S, Xia X, Huang J, Cui J. USP19 suppresses inflammation and promotes M2-like macrophage polarization by manipulating NLRP3 function via autophagy. Cell Mol Immunol 2021; 18:2431-2442. [PMID: 33097834 PMCID: PMC8484569 DOI: 10.1038/s41423-020-00567-7] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/26/2020] [Indexed: 02/07/2023] Open
Abstract
Macrophage polarization to proinflammatory M1-like or anti-inflammatory M2-like cells is critical to mount a host defense or repair tissue. The exact molecular mechanisms controlling this process are still elusive. Here, we report that ubiquitin-specific protease 19 (USP19) acts as an anti-inflammatory switch that inhibits inflammatory responses and promotes M2-like macrophage polarization. USP19 inhibited NLRP3 inflammasome activation by increasing autophagy flux and decreasing the generation of mitochondrial reactive oxygen species. In addition, USP19 inhibited the proteasomal degradation of inflammasome-independent NLRP3 by cleaving its polyubiquitin chains. USP19-stabilized NLRP3 promoted M2-like macrophage polarization by direct association with interferon regulatory factor 4, thereby preventing its p62-mediated selective autophagic degradation. Consistent with these observations, compared to wild-type mice, Usp19-/- mice had decreased M2-like macrophage polarization and increased interleukin-1β secretion, in response to alum and chitin injections. Thus, we have uncovered an unexpected mechanism by which USP19 switches the proinflammatory function of NLRP3 into an anti-inflammatory function, and suggest that USP19 is a potential therapeutic target for inflammatory interventions.
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Affiliation(s)
- Tao Liu
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Liqiu Wang
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Puping Liang
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Xiaojuan Wang
- grid.12981.330000 0001 2360 039XDepartment of Experimental Medicine, State Key Laboratory of Oncology in South China, Sun Yat-sen University, 510275 Guangzhou, People’s Republic of China
| | - Yukun Liu
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Jing Cai
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Yuanchu She
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Dan Wang
- grid.12981.330000 0001 2360 039XDepartment of Experimental Medicine, State Key Laboratory of Oncology in South China, Sun Yat-sen University, 510275 Guangzhou, People’s Republic of China
| | - Zhi Wang
- grid.12981.330000 0001 2360 039XGuanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, 510060 Guangzhou, Guangdong People’s Republic of China
| | - Zhiyong Guo
- grid.12981.330000 0001 2360 039XOrgan Transplant Center, The First Affiliated Hospital, Sun Yat-Sen University, 510080 Guangzhou, Guangdong People’s Republic of China
| | - Samuel Bates
- grid.38142.3c000000041936754XChanning Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 USA
| | - Xiaojun Xia
- grid.12981.330000 0001 2360 039XDepartment of Experimental Medicine, State Key Laboratory of Oncology in South China, Sun Yat-sen University, 510275 Guangzhou, People’s Republic of China
| | - Junjiu Huang
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China
| | - Jun Cui
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 510275 Guangzhou, Guangdong People’s Republic of China ,grid.12981.330000 0001 2360 039XDepartment of Experimental Medicine, State Key Laboratory of Oncology in South China, Sun Yat-sen University, 510275 Guangzhou, People’s Republic of China
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29
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Cai B, Zhao J, Zhang Y, Liu Y, Ma C, Yi F, Zheng Y, Zhang L, Chen T, Liu H, Liu B, Gao C. USP5 attenuates NLRP3 inflammasome activation by promoting autophagic degradation of NLRP3. Autophagy 2021; 18:990-1004. [PMID: 34486483 DOI: 10.1080/15548627.2021.1965426] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
ABBREVIATIONS 3-MA: 3-methyladenine; AIM2: absent in melanoma 2; ATG5: autophagy related 5; BafA1: bafilomycin A1; CASP1: caspase 1; CHX: cycloheximide; Co-IP: co-immunoprecipitation; CQ: chloroquine; DUBs: deubiquitinases; IL1B/IL-1β: interleukin 1 beta; LAMP1: lysosomal associated membrane protein 1; LPS: lipopolysaccharide; MARCHF7/MARCH7: membrane associated RING-CH-type finger 7; NFKB/NF-κB: nuclear factor kappa B; Nig.: nigericin; NLRC4: NLR family CARD domain containing 4; NLRP3: NLR family pyrin domain containing 3; PECs: peritoneal exudate cells; PMN: polymorphonuclear; PMs: peritoneal macrophages; PYCARD/ASC: PYD and CARD domain containing; TLRs: toll like receptors; TNF/TNF-α: tumor necrosis factor; Ub: ubiquitin; USP5: ubiquitin specific peptidase 5; WT: wild type.
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Affiliation(s)
- Baoshan Cai
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Jian Zhao
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Yuling Zhang
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Yaxing Liu
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Chunhong Ma
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Fan Yi
- Department of Pharmacology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Yi Zheng
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Lei Zhang
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Tian Chen
- Department of Pathogenic Biology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Huiqing Liu
- Department of Pharmacology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Bingyu Liu
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
| | - Chengjiang Gao
- Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
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Sefiani A, Geoffroy CG. The Potential Role of Inflammation in Modulating Endogenous Hippocampal Neurogenesis After Spinal Cord Injury. Front Neurosci 2021; 15:682259. [PMID: 34220440 PMCID: PMC8249862 DOI: 10.3389/fnins.2021.682259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/17/2021] [Indexed: 12/24/2022] Open
Abstract
Currently there are approximately 291,000 people suffering from a spinal cord injury (SCI) in the United States. SCI is associated with traumatic changes in mobility and neuralgia, as well as many other long-term chronic health complications, including metabolic disorders, diabetes mellitus, non-alcoholic steatohepatitis, osteoporosis, and elevated inflammatory markers. Due to medical advances, patients with SCI survive much longer than previously. This increase in life expectancy exposes them to novel neurological complications such as memory loss, cognitive decline, depression, and Alzheimer's disease. In fact, these usually age-associated disorders are more prevalent in people living with SCI. A common factor of these disorders is the reduction in hippocampal neurogenesis. Inflammation, which is elevated after SCI, plays a major role in modulating hippocampal neurogenesis. While there is no clear consensus on the mechanism of the decline in hippocampal neurogenesis and cognition after SCI, we will examine in this review how SCI-induced inflammation could modulate hippocampal neurogenesis and provoke age-associated neurological disorders. Thereafter, we will discuss possible therapeutic options which may mitigate the influence of SCI associated complications on hippocampal neurogenesis.
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31
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Dogan K, Kural A, Oztoprak Y, Dogan M. Interleukin-1β and uric acid as potential second-trimester predictive biomarkers of preeclampsia. Hypertens Pregnancy 2021; 40:186-192. [PMID: 33956562 DOI: 10.1080/10641955.2021.1921793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Methods: The prospective study was conducted at the University Hospital from February 2020 to December 2020. The study population (n = 88) included women who later developed PE (n = 42), as well as women who were healthy at birth (n = 46) in the second trimester of pregnancy. Serum levels of CRP, IL-1β, uric acid, creatinine, AST, ALT, MPV, Hb, PC, vitamin D, Ca, and Mg were compared between the groups.Results: Serum IL-1β and uric acid levels were significantly higher in subjects who eventually developed PE compared with those who did not.Conclusions: IL-1β and uric acid may be a predictive markers for PE. Maternal serum IL-1β and uric acid levels in the second trimester of pregnancy may be a predictive markers for PE.
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Affiliation(s)
- Keziban Dogan
- University of Health Sciences, Bakirköy Dr. Sadi Konuk Training and Research Hospital, Department of Obstetrics and Gynecology, Istanbul, Turkey
| | - Alev Kural
- University of Health Sciences, Bakirköy Dr. Sadi Konuk Training and Research Hospital, Department of Biochemistry, Istanbul, Turkey
| | - Yasin Oztoprak
- University of Health Sciences, Bakirköy Dr. Sadi Konuk Training and Research Hospital, Department of Obstetrics and Gynecology, Istanbul, Turkey
| | - Murat Dogan
- University of Health Sciences, Bakirköy Dr. Sadi Konuk Training and Research Hospital, Department of Anesthesia and Reanimation Clinics, Istanbul, Turkey
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OmpA Protein-Deficient Acinetobacter baumannii Outer Membrane Vesicles Trigger Reduced Inflammatory Response. Pathogens 2021; 10:pathogens10040407. [PMID: 33807410 PMCID: PMC8066360 DOI: 10.3390/pathogens10040407] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 12/16/2022] Open
Abstract
Multidrug resistant Acinetobacter baumannii shows a growing number of nosocomial infections worldwide during the last decade. The outer membrane vesicles (OMVs) produced by this bacterium draw increasing attention as a possible treatment target. OMVs have been implicated in the reduction of antibiotic level in the surrounding environment, transfer of virulence factors into the host cells, and induction of inflammatory response. Although the evidence on the involvement of OMVs in A. baumannii pathogenesis is currently growing, their role during inflammation is insufficiently explored. It is likely that bacteria, by secreting OMVs, can expand the area of their exposure and prepare surrounding matrix for infection. Here, we investigated the impact of A. baumannii OMVs on activation of macrophages in vitro. We show that OmpA protein present in A. baumannii OMVs substantially contributes to the proinflammatory response in J774 murine macrophages and to the cell death in both lung epithelium cells and macrophages. The loss of OmpA protein in OMVs, obtained from A. baumannii ∆ompA mutant, resulted in the altered expression of genes coding for IL-6, NLRP3 and IL-1β proinflammatory molecules in macrophages in vitro. These results imply that OmpA protein in bacterial OMVs could trigger a more intense proinflammatory response.
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Chrysin prevents lipopolysaccharide-induced acute lung injury in mice by suppressing the IRE1α/TXNIP/NLRP3 pathway. Pulm Pharmacol Ther 2021; 68:102018. [PMID: 33771723 DOI: 10.1016/j.pupt.2021.102018] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/12/2021] [Accepted: 03/18/2021] [Indexed: 02/07/2023]
Abstract
Acute lung injury (ALI) remains a serious challenge in the intensive care unit. Inflammation plays a key role in the progression of ALI. Chrysin (CHR) is a natural flavonoid with anti-inflammatory functions. We investigated the anti-inflammatory effects in a mouse model of ALI induced by lipopolysaccharide (LPS), and identified the underlying mechanisms of its action. Following CHR administration, mice were challenged with LPS intratracheally for 6 h to induce ALI. Compared to mice challenged with LPS alone, the presence of CHR showed a reduction in the development of lung injuries, as confirmed by histopathological observation. Pre-treatment with CHR attenuated inflammation by reducing the production of myeloperosidase (MPO), and pro-inflammatory cytokine levels in the lung and bronchoalveolar lavage fluid (BALF). Furthermore, CHR improved lung edema by reducing the vascular permeability, as demonstrated by less evans blue staining in the lung tissue and low levels of protein in BALF. In addition, our results proved that CHR improved the antioxidant capacity by increasing the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in the lung tissue. Results of western blot assays suggested that CHR suppressed the LPS-induced expression of glucose-regulated protein 78 (GRP78) and phosphorylated inositol-requiring enzyme 1α (p-IRE1α). We also found that CHR suppressed the expression of thioredoxin interaction protein (TXNIP), nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) and cleaved caspase-1. In conclusion, CHR improved vascular permeability and mitigated the inflammatory response of lung tissue by suppressing the IRE1α/TXNIP/NLRP3 pathway, thereby alleviating LPS-induced ALI in the lungs of mice.
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Zhang LJ, Wang XD, Ji MS, Hasimu H, Abliz P. Characterisation of a clinical isolated Aspergillus lentulus strain using a Galleria mellonella infection model. J Thorac Dis 2021; 13:803-811. [PMID: 33717553 PMCID: PMC7947491 DOI: 10.21037/jtd-20-961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 11/03/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND In recent years, the number of invasive aspergillus infection cases caused by Aspergillus lentulus (A. lentulus) has gradually increased and this fungus is usually difficult to distinguish from Aspergillus fumigatus in morphology. All of these presents a great challenge to the treatment of invasive fungal infections caused by A. lentulus. The present study aims to discuss the antifungal resistance, virulence and inflammatory factors' changes after the infection of larvae of A. lentulus separated from patients with chronic obstructive pulmonary disease (COPD) to reflect the host immune response. METHODS A. lentulus isolated from COPD patients was identified by morphology and molecular biology, and its drug sensitivity was determined in vitro. Then the virulence factors and inflammatory response related factors of A. lentulus were determined by the model of A. lentulus infecting larvae. These were divided into three groups: A. lentulus standard strain, A. lentulus strain isolated from patients; PBS control. The infection model was formed by injecting the suspension of A. lentulus at a concentration of 1×106 CFU into larvae, in order to determine the (1,3)-β-D-glucan and galactomannan levels, and determine the caspase-1 and TNF-α concentration in Galleria mellonella larvae by RT-PCR. RESULTS The results revealed that A. lentulus had good sensitivity to itraconazole, voriconazole and micafungin, while (1,3)-β-D-glucan was negative in the two groups. The level of galactomannan in the two groups was higher than that in the control group, and the difference was statistically significant (P<0.05). However, there was no statistical difference between the standard strain group and patient strain group (P>0.05). After the infection of larvae, caspase-1 and TNF-α in the Galleria mellonella larvae increased in the two groups, and these elevated levels were statistically significant in both groups (P<0.05). However, there was no significant difference between the two groups (P>0.05). CONCLUSIONS There is no significant difference in virulence factor and host inflammatory response between A. lentulus isolated from COPD patients and standard strains. Galactomannan has more advantages in the early detection of A. lentulus invasive infection. Furthermore, the caspase-1-mediated inflammasome pathway may be involved in the host immune response to A. lentulus.
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Affiliation(s)
- Li-Juan Zhang
- Department of Dermatology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Xiao-Dong Wang
- Department of Dermatology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Ming-Shuo Ji
- Department of Dermatology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Hadiliya Hasimu
- Department of Dermatology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Paride Abliz
- Department of Dermatology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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35
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鄢 海, 邹 纯. [Mechanism and material basis of Lianhua Qingwen capsule for improving clinical cure rate of COVID-19: a study based on network pharmacology and molecular docking technology]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:20-30. [PMID: 33509749 PMCID: PMC7867482 DOI: 10.12122/j.issn.1673-4254.2021.01.03] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To explore the potential targets, signal pathways and biological functions that mediate the effect of Lianhua Qingwen capsule in improving clinical cure rate of COVID-19 in light of network pharmacology and molecular docking technology. METHODS TCMSP, Target, Prediction, CooLGeN, GeneCards, DAVID and other databases were searched for the active components and their target proteins from 13 herbs including Forsythia, Honeysuckle and roasted Ephedra used in Lianhua Qingwen capsule. The common target proteins, signal pathways and biological functions shared by these components and the clinical manifestations of COVID-19 (fever, cough, and fatigue) were identified to construct the network consisting of the component drugs in Lianhua Qingwen capsule, the active ingredients of, their targets of action, and the biological functions involved using Gephi software. RESULTS A total 160 active components including MOL000522, and MOL003283, MOL003365, MOL003006, MOL003014 in 13 component drugs in Lianhua Qingwen capsule produced therapeutic effects against COVID-19 through 57 target proteins including MAPK1, IL6, HSP90AA1, TNF, and CCL2, involving 35 signaling pathways including NOD-like receptor signaling pathway and Toll-like receptor signaling pathway. The results of molecular docking showed that 83 chemical components had total scores no less than 5.0 for docking with 12 target proteins (including MAPK1, IL6, and HSP90AA1) with high binding activities to form stable conformations. The binding of MOL000522, MOL004989, and MOL003330 with MAPK1; MOL001495 and MOL001494 with NLRP3; MOL004908, MOL004863 and MOL004806 with HSP90AA1; MOL001749 with TLR9; and MOL001495 with AKT1 all had total scores exceeding 9.0. CONCLUSIONS Lianhua Qingwen capsule contains multiple effective ingredients to improve clinical cure rate of COVID-19, and its therapeutic effect is mediated by multiple protein targets, signal pathways and biological functions.
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Affiliation(s)
- 海燕 鄢
- />皖南医学院药学院,安徽 芜湖 241002School of Pharmacy, Wannan Medical College, Wuhu 241002, China
| | - 纯才 邹
- />皖南医学院药学院,安徽 芜湖 241002School of Pharmacy, Wannan Medical College, Wuhu 241002, China
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McVey MJ, Steinberg BE, Goldenberg NM. Inflammasome activation in acute lung injury. Am J Physiol Lung Cell Mol Physiol 2020; 320:L165-L178. [PMID: 33296269 DOI: 10.1152/ajplung.00303.2020] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Inflammasomes are multiprotein complexes tasked with sensing endogenous or exogenous inflammatory signals and integrating this signal into a downstream response. Inflammasome activation has been implicated in a variety of pulmonary diseases, including pulmonary hypertension, bacterial pneumonia, COPD, and asthma. Of increasing interest is the contribution of inflammasome activation in the context of acute lung injury/acute respiratory distress syndrome (ALI/ARDS). Inflammasome activation in both the lung parenchyma and resident immune cells generates intereukin-1β (IL-1β) and IL-18, both of which drive the cascade of lung inflammation forward. Blockade of these responses has been shown to be beneficial in animal models and is a focus of translational research in the field. In this review, we will discuss the assembly and regulation of inflammasomes during lung inflammation, highlighting therapeutically viable effector steps. We will examine the importance of IL-1β and IL-18, two key products of inflammasome activation, in ALI, as well as the contribution of the pulmonary endothelial cell to this process. Finally, we will explore translational research moving toward anti-inflammasome therapies for ALI/ARDS and speculate toward future directions for the field.
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Affiliation(s)
- Mark J McVey
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physics, Ryerson University, Toronto, Ontario, Canada
| | - Benjamin E Steinberg
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Neil M Goldenberg
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
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Gencer S, Lacy M, Atzler D, van der Vorst EPC, Döring Y, Weber C. Immunoinflammatory, Thrombohaemostatic, and Cardiovascular Mechanisms in COVID-19. Thromb Haemost 2020; 120:1629-1641. [PMID: 33124029 PMCID: PMC7869061 DOI: 10.1055/s-0040-1718735] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/14/2020] [Indexed: 12/15/2022]
Abstract
The global coronavirus disease 2019 (COVID-19) pandemic has deranged the recent history of humankind, afflicting more than 27 million individuals to date. While the majority of COVID-19 patients recuperate, a considerable number of patients develop severe complications. Bilateral pneumonia constitutes the hallmark of severe COVID-19 disease but an involvement of other organ systems, namely the cardiovascular system, kidneys, liver, and central nervous system, occurs in at least half of the fatal COVID-19 cases. Besides respiratory failure requiring ventilation, patients with severe COVID-19 often display manifestations of systemic inflammation and thrombosis as well as diffuse microvascular injury observed postmortem. In this review, we survey the mechanisms that may explain how viral entry and activation of endothelial cells by severe acute respiratory syndrome coronavirus 2 can give rise to a series of events including systemic inflammation, thrombosis, and microvascular dysfunction. This pathophysiological scenario may be particularly harmful in patients with overt cardiovascular disease and may drive the fatal aspects of COVID-19. We further shed light on the role of the renin-angiotensin aldosterone system and its inhibitors in the context of COVID-19 and discuss the potential impact of antiviral and anti-inflammatory treatment options. Acknowledging the comorbidities and potential organ injuries throughout the course of severe COVID-19 is crucial in the clinical management of patients affecting treatment approaches and recovery rate.
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Affiliation(s)
- Selin Gencer
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
| | - Michael Lacy
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Dorothee Atzler
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
- Walther Straub Institute for Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Emiel P. C. van der Vorst
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
- Interdisciplinary Center for Clinical Research (IZKF), Institute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, Aachen, Germany
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Yvonne Döring
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
- Divison of Angiology, Swiss Cardiovascular Center, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - Christian Weber
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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Sato Y, Tansho-Nagakawa S, Ubagai T, Ono Y. Analysis of Immune Responses in Acinetobacter baumannii-Infected Klotho Knockout Mice: A Mouse Model of Acinetobacter baumannii Infection in Aged Hosts. Front Immunol 2020; 11:601614. [PMID: 33329595 PMCID: PMC7719750 DOI: 10.3389/fimmu.2020.601614] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/27/2020] [Indexed: 12/24/2022] Open
Abstract
Acinetobacter baumannii is an important opportunistic pathogen that primarily afflicts elderly people. To clarify the pathogenicity of A. baumannii in the elderly, we investigated immune responses to A. baumannii ATCC 19606 infection in klotho knockout (KO) mice, the mouse model of aging. Following intravenous inoculation, the mice seldom displayed severe symptoms. However, the survival rate was 56% at 7 days post-infection. Bacteria were detected in the lungs of klotho KO mice but not klotho wildtype (WT) mice at 7 days post-infection. Neutrophils, eosinophils, interstitial macrophages, and monocyte/dendritic cell subset in the lungs of klotho KO mice were transiently induced after infection with A. baumannii. The number of alveolar macrophages in klotho KO mice was lower than that in klotho WT mice, except for 1 day post-infection. CD11b expression on neutrophils and alveolar macrophages in the lungs of klotho KO mice was seldom upregulated by the infection. These results suggested that immune functions eliminating bacteria in the lungs of klotho KO mice were insufficient. CD11blow conventional DC cells hardly increased in klotho KO mice infected with A. baumannii. Additionally, the production of interleukin (IL)-10 in the sera of klotho KO mice was significantly higher than that in klotho WT mice, whereas that production of interferon-gamma was not detected in the sera of klotho KO mice. These results suggested that acquired immune responses were hardly induced in klotho KO mice. IL-1β, CXCL1, CXCL2, and CCL2 expression was significantly higher in the lungs of klotho KO mice infected with A. baumannii than in those of klotho WT mice at 1 day post-infection. These results suggested that pulmonary inflammation was elicited in klotho KO mice during early infection. The expression levels of proinflammatory cytokines significantly correlated with TLR9 expression in the lungs of klotho KO mice. The collective results demonstrate an A. baumannii infection state in aged hosts and suggest that pulmonary inflammation and bacterial burden should be noted in aged hosts even in the absence of severe symptoms of A. baumannii infection.
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Affiliation(s)
- Yoshinori Sato
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo, Japan
| | - Shigeru Tansho-Nagakawa
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo, Japan
| | - Tsuneyuki Ubagai
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo, Japan
| | - Yasuo Ono
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo, Japan
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Chen W. Host Innate Immune Responses to Acinetobacter baumannii Infection. Front Cell Infect Microbiol 2020; 10:486. [PMID: 33042864 PMCID: PMC7521131 DOI: 10.3389/fcimb.2020.00486] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 08/05/2020] [Indexed: 12/23/2022] Open
Abstract
Acinetobacter baumannii has emerged as a major threat to global public health and is one of the key human pathogens in healthcare (nosocomial and community-acquired)-associated infections. Moreover, A. baumannii rapidly develops resistance to multiple antibiotics and is now globally regarded as a serious multidrug resistant pathogen. There is an urgent need to develop novel vaccines and immunotherapeutics as alternatives to antibiotics for clinical management of A. baumannii infection. However, our knowledge of host immune responses to A. baumannii infection and the identification of novel therapeutic targets are significantly lacking. This review highlights the recent advances and critical gaps in our understanding how A. baumannii interacts with the host innate pattern-recognition receptors, induces a cascade of inflammatory cytokine and chemokine responses, and recruits innate immune effectors (such as neutrophils and macrophages) to the site of infection for effective control of the infection. Such knowledge will facilitate the identification of new targets for the design and development of effective therapeutics and vaccines to fight this emerging threat.
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Affiliation(s)
- Wangxue Chen
- Human Health and Therapeutics (HHT) Research Center, National Research Council Canada, Ottawa, ON, Canada.,Department of Biology, Brock University, St. Catharines, ON, Canada
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Crosstalk between ER stress, NLRP3 inflammasome, and inflammation. Appl Microbiol Biotechnol 2020; 104:6129-6140. [PMID: 32447438 DOI: 10.1007/s00253-020-10614-y] [Citation(s) in RCA: 132] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/31/2020] [Accepted: 04/05/2020] [Indexed: 12/17/2022]
Abstract
Endoplasmic reticulum stress (ERS) is a protective response to restore protein homeostasis by activating the unfolded protein response (UPR). However, UPR can trigger cell death under severe and/or persistently high ERS. The NLRP3 inflammasome is a complex of multiple proteins that activates the secretion of the proinflammatory cytokine IL-1β in a caspase-1-dependent manner to participate in the regulation of inflammation. The NLRP3 inflammasome involvement in ERS-induced inflammation has not been completely described. The intersection of ERS with multiple inflammatory pathways can initiate and aggravate chronic diseases. Accumulating evidence suggests that ERS-induced activation of NLRP3 inflammasome is the pathological basis of various inflammatory diseases. In this review, we have discussed the networks between ERS and NLRP3 inflammasome, with the view to identifying novel therapeutic targets in inflammatory diseases. KEY POINTS: • Endoplasmic reticulum stress (ERS) is an important factor for the activation of the NLRP3 inflammasomes that results in pathological processes. • ERS can activate the NLRP3 inflammasome to induce inflammatory responses via oxidative stress, calcium homeostasis, and NF-κB activation. • The interactions between ERS and NLRP3 inflammasome are associated with inflammation, which represent a potential therapeutic opportunity of inflammatory diseases.
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Kang MJ, Jang AR, Park JY, Ahn JH, Lee TS, Kim DY, Jung DH, Song EJ, Hong JJ, Park JH. Cathelicidin-related Antimicrobial Peptide Contributes to Host Immune Responses Against Pulmonary Infection with Acinetobacter baumannii in Mice. Immune Netw 2020; 20:e25. [PMID: 32655973 PMCID: PMC7327154 DOI: 10.4110/in.2020.20.e25] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/27/2020] [Accepted: 05/06/2020] [Indexed: 12/20/2022] Open
Abstract
Acinetobacter baumannii is known for its multidrug antibiotic resistance. New approaches to treating drug-resistant bacterial infections are urgently required. Cathelicidin-related antimicrobial peptide (CRAMP) is a murine antimicrobial peptide that exerts diverse immune functions, including both direct bacterial cell killing and immunomodulatory effects. In this study, we sought to identify the role of CRAMP in the host immune response to multidrug-resistant Acinetobacter baumannii. Wild-type (WT) and CRAMP knockout mice were infected intranasally with the bacteria. CRAMP−/− mice exhibited increased bacterial colony-forming units (CFUs) in bronchoalveolar lavage (BAL) fluid after A. baumannii infection compared to WT mice. The loss of CRAMP expression resulted in a significant decrease in the recruitment of immune cells, primarily neutrophils. The levels of IL-6 and CXCL1 were lower, whereas the levels of IL-10 were significantly higher in the BAL fluid of CRAMP−/− mice compared to WT mice 1 day after infection. In an in vitro assay using thioglycollate-induced peritoneal neutrophils, the ability of bacterial phagocytosis and killing was impaired in CRAMP−/− neutrophils compared to the WT cells. CRAMP was also essential for the production of cytokines and chemokines in response to A. baumannii in neutrophils. In addition, the A. baumannii-induced inhibitor of κB-α degradation and phosphorylation of p38 MAPK were impaired in CRAMP−/− neutrophils, whereas ERK and JNK phosphorylation was upregulated. Our results indicate that CRAMP plays an important role in the host defense against pulmonary infection with A. baumannii by promoting the antibacterial activity of neutrophils and regulating the innate immune responses.
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Affiliation(s)
- Min-Jung Kang
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Ah-Ra Jang
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Ji-Yeon Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Jae-Hun Ahn
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Tae-Sung Lee
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Dong-Yeon Kim
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Do-Hyeon Jung
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Eun-Jung Song
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Jung Joo Hong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk 28116, Korea
| | - Jong-Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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Liu P, Wang J, Wen W, Pan T, Chen H, Fu Y, Wang F, Huang JH, Xu S. Cinnamaldehyde suppresses NLRP3 derived IL-1β via activating succinate/HIF-1 in rheumatoid arthritis rats. Int Immunopharmacol 2020; 84:106570. [PMID: 32413739 DOI: 10.1016/j.intimp.2020.106570] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/18/2020] [Accepted: 05/04/2020] [Indexed: 02/06/2023]
Abstract
Cinnamaldehyde (CA) is an essential component of cinnamon (Cinnamomum cassia Presland), which is often used as a flavoring condiment in beverages, pastries, perfumes, etc. Cinnamon is also used as herbal medicine in China and Southeast Asia to treat rheumatoid arthritis. However, the molecular mechanism is unclear. In this study, we aim to investigate its anti-inflammatory effects against Rheumatoid arthritis (RA) using activated macrophages (Raw246.7) in vitro and adjuvant arthritis rats (AA) in vivo. The results demonstrated that CA significantly reduced synovial inflammation in AA rats, possibly due to suppression of the expressions of pro-inflammatory cytokines, especially the IL-1β. Further investigation found that CA also suppressed the activity of HIF-1α by inhibiting the accumulation of succinate in cytoplasm. As we know, the reduction of HIF-1α nucleation slows down IL-1β production, because HIF-1α activates the expression of NLRP3, which is involved in the assembly of inflammasome and processing of IL-1β. In addition, CA also inhibited the expression of the succinate receptor GPR91, which in turn inhibited the activation of HIF-1α. In conclusions, our results suggested that CA might be a potential therapeutic compound to relieve rheumatoid arthritis progress by suppressing IL-1β through modulating succinate/HIF-1α axis and inhibition of NLRP3.
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Affiliation(s)
- Panwang Liu
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Jie Wang
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Wen Wen
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Ting Pan
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Huan Chen
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Ying Fu
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China
| | - Fushun Wang
- Institute of Brain and Psyhological Sciences, Sichuan Normal University, Chengdu, Sichuan 610000, China
| | - Jason H Huang
- Department of Neurosurgery, Balor Scott & White Health Science Center, Temple, TX, United States; Department of Surgery, Texas A&M University College of Medicine, Temple, TX 79409, United States
| | - Shijun Xu
- Institute of Meterial Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China; School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China.
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Zeng X, Gu H, Peng L, Yang Y, Wang N, Shi Y, Zou Q. Transcriptome Profiling of Lung Innate Immune Responses Potentially Associated With the Pathogenesis of Acinetobacter baumannii Acute Lethal Pneumonia. Front Immunol 2020; 11:708. [PMID: 32391015 PMCID: PMC7188829 DOI: 10.3389/fimmu.2020.00708] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 03/30/2020] [Indexed: 02/05/2023] Open
Abstract
Acinetobacter baumannii is one of the dominating causes of nosocomial pneumonia, however, very little is known about the host immune response associated with pathogenesis of A. baumannii infection. Here, we used a hypervirulent A. baumannii to establish an acute lethal pneumonia, supported by high bacterial burdens, severe inflammatory cells infiltration and lung damage. The lung transcriptome changes in response to A. baumannii lethal pneumonia were detected by RNA sequencing. The results showed that 6,288 host genes changed expression, with 3,313 upregulated genes and 2,975 downregulated genes. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis revealed that genes related to TNF, cytokine-cytokine receptor interaction, Toll-like receptor, NOD-like receptor, NF-κB, Jak-STAT, HIF-1 signaling pathways, apoptosis, and phagosome were significantly upregulated. Whereas, genes associated with PI3K-AKT signaling pathway, glycolysis/gluconeogenesis, amino acid and fatty acid metabolism were downregulated. Immune cell typing highlighted the inflammatory response of innate immune cells headed by neutrophils. The reliability of RNA sequencing results were verified with selected differentially expressed genes by real-time PCR. This work provides an insight into the pathogenesis of lethal A. baumannii lung infection.
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Affiliation(s)
- Xi Zeng
- Department of Microbiology and Biochemical Pharmacy, National Engineering Research Center of Immunological Products, College of Pharmacy, Army Medical University, Chongqing, China
| | - Hao Gu
- Department of Microbiology and Biochemical Pharmacy, National Engineering Research Center of Immunological Products, College of Pharmacy, Army Medical University, Chongqing, China.,Institute of Biopharmaceutical Research, West China Hospital, Sichuan University, Chengdu, China.,Department of Clinical Laboratory, 971st Hospital of People's Liberation Army, Qingdao, China
| | - Liusheng Peng
- Department of Microbiology and Biochemical Pharmacy, National Engineering Research Center of Immunological Products, College of Pharmacy, Army Medical University, Chongqing, China
| | - Yao Yang
- Institute of Materia Medica, College of Pharmacy, Army Medical University, Chongqing, China
| | - Ning Wang
- Institute of Biopharmaceutical Research, West China Hospital, Sichuan University, Chengdu, China
| | - Yun Shi
- Institute of Biopharmaceutical Research, West China Hospital, Sichuan University, Chengdu, China
| | - Quanming Zou
- Department of Microbiology and Biochemical Pharmacy, National Engineering Research Center of Immunological Products, College of Pharmacy, Army Medical University, Chongqing, China
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Hood-Pishchany MI, Pham L, Wijers CD, Burns WJ, Boyd KL, Palmer LD, Skaar EP, Noto MJ. Broad-spectrum suppression of bacterial pneumonia by aminoglycoside-propagated Acinetobacter baumannii. PLoS Pathog 2020; 16:e1008374. [PMID: 32168364 PMCID: PMC7094866 DOI: 10.1371/journal.ppat.1008374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 03/25/2020] [Accepted: 01/31/2020] [Indexed: 12/29/2022] Open
Abstract
Antimicrobial resistance is increasing in pathogenic bacteria. Yet, the effect of antibiotic exposure on resistant bacteria has been underexplored and may affect pathogenesis. Here we describe the discovery that propagation of the human pathogen Acinetobacter baumannii in an aminoglycoside antibiotic results in alterations to the bacterium that interact with lung innate immunity resulting in enhanced bacterial clearance. Co-inoculation of mice with A. baumannii grown in the presence and absence of the aminoglycoside, kanamycin, induces enhanced clearance of a non-kanamycin-propagated strain. This finding can be replicated when kanamycin-propagated A. baumannii is killed prior to co-inoculation of mice, indicating the enhanced bacterial clearance results from interactions with innate host defenses in the lung. Infection with kanamycin-propagated A. baumannii alters the kinetics of phagocyte recruitment to the lung and reduces pro- and anti-inflammatory cytokine and chemokine production in the lung and blood. This culminates in reduced histopathologic evidence of lung injury during infection despite enhanced bacterial clearance. Further, the antibacterial response induced by killed aminoglycoside-propagated A. baumannii enhances the clearance of multiple clinically relevant Gram-negative pathogens from the lungs of infected mice. Together, these findings exemplify cooperation between antibiotics and the host immune system that affords protection against multiple antibiotic-resistant bacterial pathogens. Further, these findings highlight the potential for the development of a broad-spectrum therapeutic that exploits a similar mechanism to that described here and acts as an innate immunity modulator. Preserving the ability to treat infectious diseases with antibiotics in the face of the rapid proliferation of drug-resistant bacterial pathogens is among the greatest challenges facing medicine. Efforts to combat antimicrobial resistance may include strategies to maximize the utility of existing antibiotics while also identifying new therapeutic targets to treat bacterial infections. Acinetobacter baumannii is a human pathogen and strains of A. baumannii have acquired multi- and pan-antibiotic resistance. Here, we demonstrate that A. baumannii that is resistant to the aminoglycoside class of antibiotics is rapidly cleared from the lungs of mice when exposed to aminoglycoside antibiotics. Exposure to aminoglycosides induces changes in A. baumannii that interact with mouse antibacterial defenses, leading to rapid clearance of the infection. Further, killed aminoglycoside-exposed A. baumannii interacts with innate immunity in the lung to enhance the clearance of other pathogenic bacteria. These findings indicate that pneumonia caused by aminoglycoside-resistant A. baumannii may be effectively treated with aminoglycoside antibiotics and also suggests that the host immune response can be targeted to enhance the clearance of bacterial infections.
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Affiliation(s)
- M. Indriati Hood-Pishchany
- Department of Pediatrics, Division of Infectious Diseases, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | - Ly Pham
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Christiaan D. Wijers
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - William J. Burns
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Kelli L. Boyd
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Lauren D. Palmer
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Eric P. Skaar
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Tennessee Valley Healthcare System, US Department of Veterans Affairs, Nashville, Tennessee, United States of America
- * E-mail: (EPS); (MJN)
| | - Michael J. Noto
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- * E-mail: (EPS); (MJN)
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Ding S, Wang H, Wang M, Bai L, Yu P, Wu W. Resveratrol alleviates chronic "real-world" ambient particulate matter-induced lung inflammation and fibrosis by inhibiting NLRP3 inflammasome activation in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 182:109425. [PMID: 31295660 DOI: 10.1016/j.ecoenv.2019.109425] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 07/02/2019] [Accepted: 07/05/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Inhalation of fine particulate matter (PM2.5) induces the occurrence of lung inflammation and fibrosis, but its molecular mechanism remains unclear. Resveratrol (RES) is known to have anti-inflammatory properties in many pulmonary diseases. Here, we aimed to investigate the effect of long-term "real-world" ambient PM exposure on lung inflammation and fibrosis and further explore the protective effect and mechanism of RES. METHODS AND RESULTS RES (50 and 100 mg/kg.bw) was administered to C57BL/6J mice that were exposed to ambient PM for 5 months. The control group breathed filtered air without RES, and the PM group was exposed to PM without RES. The inflammatory cytokine levels in bronchoalveolar lavage fluid (BALF) and lung fibrosis were evaluated by enzyme-linked immune sorbent assay (ELISA) kits and Masson's trichrome staining. The real-time PCR and Western blot analysis were used to determine the signal pathway. In vivo, PM exposure markedly elevated the levels of inflammatory cytokines and TGF-β1 in BALF, induced lung fibrosis. Meanwhile, PM exposure triggered autophagy process and activated the nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3) inflammasome in lung. Also, RES treatment abolished PM-induced lung inflammation and fibrosis, and inhibited autophagic process and NLRP3 inflammasome activation. In vitro, PM2.5-induced cytotoxicity in BEAS-2B cells dose-dependently. Besides, RES alleviated PM2.5-induced cytotoxicity, inhibited autophagic process and NLRP3 inflammasome activity and decreased IL-1β production in BEAS-2B cells. CONCLUSION Long-term PM exposure induced lung inflammation and fibrosis, and RES intervention alleviated these adverse effects via inhibiting autophagy-related NLRP3 inflammasome activation.
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Affiliation(s)
- Shibin Ding
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, PR China.
| | - Huifeng Wang
- Department of Cardiology, General Hospital of TISCO, No. 7 South Second Lane, Yingxin Street, Jiancao District, Taiyuan, 030008, PR China
| | - Mengruo Wang
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, PR China
| | - Lanxin Bai
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, PR China
| | - Pengxin Yu
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, PR China
| | - Weidong Wu
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, PR China
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Mousavi M, Hedayatpour A, Mortezaee K, Mohamadi Y, Abolhassani F, Hassanzadeh G. Schwann cell transplantation exerts neuroprotective roles in rat model of spinal cord injury by combating inflammasome activation and improving motor recovery and remyelination. Metab Brain Dis 2019; 34:1117-1130. [PMID: 31165391 DOI: 10.1007/s11011-019-00433-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 05/13/2019] [Indexed: 12/16/2022]
Abstract
Inflammasome activation in the traumatic central nervous system (CNS) injuries is responsible for propagation of an inflammatory circuit and neuronal cell death resulting in sensory/motor deficiencies. NLRP1 and NLRP3 are known as activators of inflammasome complex in the spinal cord injury (SCI). In this study, cell therapy using Schwann cells (SCs) was applied for targeting NLRP inflammasome complexes outcomes in the motor recovery. These cells were chosen due to their regenerative roles for CNS injuries. SCs were isolated from sciatic nerves and transplanted to the contusive SCI-induced Wistar rats. NLRP1 and NLRP3 inflammasome complexes and their related pro-inflammatory cytokines were assayed in both mRNA and protein levels. Neuronal cell survival (Nissl staining), motor recovery and myelination (Luxol fast blue/LFB) were also evaluated. The groups were laminectomy, SCI, vehicle and treatment. The treatment group received Schwann cells, and the vehicle group received solvent for the cells. SCI caused increased expressions for both NLRP1 and NLRP3 inflammasome complexes along with their related pro-inflammatory cytokines, all of which were abrogated after administration of SCs (except for IL-18 protein showing no change to the cell therapy). Motor deficits in the hind limb, neuronal cell death and demyelination were also found in the SCI group, which were counteracted in the treatment group. From our findings we conclude promising role for cell therapy with SCs for targeting axonal demyelination and degeneration possibly through attenuation of the activity for inflammasome complexes and related inflammatory circuit.
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Affiliation(s)
- Mahboubeh Mousavi
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Azim Hedayatpour
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Keywan Mortezaee
- Department of Anatomy, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Yousef Mohamadi
- Department of Anatomy, School of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Farid Abolhassani
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Gholamreza Hassanzadeh
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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Pires S, Parker D. Innate Immune Responses to Acinetobacter baumannii in the Airway. J Interferon Cytokine Res 2019; 39:441-449. [PMID: 31013462 DOI: 10.1089/jir.2019.0008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Acinetobacter baumannii is an emerging opportunistic pathogen that has risen to become a serious global threat, prevalent in health care settings and the community, which results in high morbidity and mortality rates. Its alarming expansion of antibiotic resistance is one of the most problematic traits of A. baumannii and as so, this bacterium has been classified as a serious threat and high priority target by the CDC. The most common types of infections induced by this pathogen include pneumonia (both hospital and community acquired), bacteremia, skin and soft tissue, urinary tract infections, endocarditis, and meningitis. Nosocomial pneumonia is the most prevalent of these. This review summarizes the current state of the signaling and innate immune components activated in response to A. baumannii infection in the airway.
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Affiliation(s)
- Sílvia Pires
- Department of Pathology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey
| | - Dane Parker
- Department of Pathology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey
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Li FJ, Starrs L, Burgio G. Tug of war between Acinetobacter baumannii and host immune responses. Pathog Dis 2019; 76:5290314. [PMID: 30657912 DOI: 10.1093/femspd/ftz004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/16/2019] [Indexed: 02/06/2023] Open
Abstract
Acinetobacter baumannii is an emerging nosocomial, opportunistic pathogen with growing clinical significance. Acinetobacter baumannii has an exceptional ability to rapidly develop drug resistance and to adhere to abiotic surfaces, including medical equipment, significantly promoting bacterial spread and also limiting our ability to control A. baumannii infections. Consequently, A. baumannii is frequently responsible for ventilator-associated pneumonia in clinical settings. In order to develop an effective treatment strategy, understanding host-pathogen interactions during A. baumannii infection is crucial. Various A. baumannii virulence factors have been identified as targets of host innate pattern-recognition receptors, which leads to activation of downstream inflammasomes to develop inflammatory responses, and the recruitment of innate immune effectors against A. baumannii infection. To counteract host immune attack, A. baumannii regulates its expression of different virulence factors. This review summarizes the significance of mechanisms of host-bacteria interaction, as well as different bacteria and host defense mechanisms during A. baumannii infection.
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Affiliation(s)
- Fei-Ju Li
- Department of Immunology and infectious Diseases, John Curtin School of Medical Research, Australian National University, 131 Garran Road, Acton, ACT 2601, Australia
| | - Lora Starrs
- Department of Immunology and infectious Diseases, John Curtin School of Medical Research, Australian National University, 131 Garran Road, Acton, ACT 2601, Australia
| | - Gaetan Burgio
- Department of Immunology and infectious Diseases, John Curtin School of Medical Research, Australian National University, 131 Garran Road, Acton, ACT 2601, Australia
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Nucleotide-binding oligomerization domain 1 is dispensable for host immune responses against pulmonary infection of Acinetobacter baumannii in mice. Lab Anim Res 2018; 34:295-301. [PMID: 30671118 PMCID: PMC6333619 DOI: 10.5625/lar.2018.34.4.295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/11/2018] [Accepted: 12/11/2018] [Indexed: 11/21/2022] Open
Abstract
Nucleotide-binding domain 1 (Nod1) is a cytosolic receptor that is responsible for the recognition of a bacterial peptidoglycan motif containing meso-diaminophimelic acid. In this study, we sought to identify the role of Nod1 in host defense in vivo against pulmonary infection by multidrug resistant Acinetobacter baumannii. Wildtype (WT) and Nod1-deficient mice were intranasally infected with 3×107 CFU of A. baumannii and sacrificed at 1 and 3 days post-infection (dpi). Bacterial CFUs, cytokines production, histopathology, and mouse β-defensins (mBD) in the lungs of infected mice were evaluated. The production of cytokines in response to A. baumannii was also measured in WT and Nod1-deficient macrophages. The bacterial clearance in the lungs was not affected by Nod1 deficiency. Levels of IL-6, TNF-α, and IL-1β in the lung homogenates were comparable at days 1 and 3 between WT and Nod1-deficient mice, except the TNF-α level at day 3, which was higher in Nod1-deficient mice. There was no significant difference in lung pathology and expression of mBDs (mBD1, 2, 3, and 4) between WT and Nod1-deficient mice infected with A. baumannii. The production of IL-6, TNF-α, and NO by macrophages in response to A. baumannii was also comparable in WT and Nod1-deficient mice. Our results indicated that Nod1 does not play an important role in host immune responses against A. baumannii infection.
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Guo RH, Park JU, Jo SJ, Ahn JH, Park JH, Yang JY, Lee SS, Park MJ, Kim YR. Anti-allergic Inflammatory Effects of the Essential Oil From Fruits of Zanthoxylum coreanum Nakai. Front Pharmacol 2018; 9:1441. [PMID: 30618741 PMCID: PMC6299012 DOI: 10.3389/fphar.2018.01441] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 11/22/2018] [Indexed: 12/26/2022] Open
Abstract
Zanthoxylum coreanum Nakai is a rare shrub which grows in Korea and China. Pericarp of Z. coreanum has been used as a crude medicine, but there are few researches about the pharmacologic activities. The present study was designed to investigate the anti-allergic inflammatory activities of the essential oil from fruits of Zanthoxylum coreanum Nakai (ZCO). Our findings showed that ZCO inhibited both the IgE-antigen complex or PMA/A23187-induced β-hexosaminidase release and IL-4 production dose-dependently in RBL-2H3 mast cells, and confirmed that ZCO at the tested concentrations did not show cytotoxicity to RBL-2H3 cells by MTS assay. Additionally, we found that ZCO showed the significant inhibition on LPS-induced overproduction of TNF-α, IL-6 and NO. Consistently, the protein levels of iNOS and COX-2 were also remarkably decreased by ZCO treatment. Herein, Our mechanistic studies revealed that ZCO significantly suppressed the activation of transcription factor NF-κB in PMA-activated 293T cells, and further inhibited NF-κB p65 translocation into the nucleus in LPS-stimulated RAW264.7 cells. Further investigation identified that ZCO down-regulated LPS-induced phosphorylation of MAPK (JNK, ERK, and p38) signal pathway. For incremental research, we established an DNCB-induced atopic dermatitis model in BALB/c mice, and found that ZCO remarkably inhibited DNCB-induced ear swelling and AD-like symptoms. Based on these findings, ZCO is suggested to have a therapeutic potential for the allergic inflammatory diseases.
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Affiliation(s)
- Rui Hong Guo
- College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju, South Korea
| | - Jung Up Park
- College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju, South Korea
| | - Se Jin Jo
- College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju, South Korea
| | - Jae Hun Ahn
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Jong Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Ji Yoon Yang
- Division of Wood Chemistry, Department of Forest Products, National Institute of Forest Science, Seoul, South Korea
| | - Sung Suk Lee
- Division of Wood Chemistry, Department of Forest Products, National Institute of Forest Science, Seoul, South Korea
| | - Mi Jin Park
- Division of Wood Chemistry, Department of Forest Products, National Institute of Forest Science, Seoul, South Korea
| | - Young Ran Kim
- College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju, South Korea
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