1
|
Medhavy A, Athanasopoulos V, Bassett K, He Y, Stanley M, Enosi Tuipulotu D, Cappello J, Brown GJ, Gonzalez-Figueroa P, Turnbull C, Shanmuganandam S, Tummala P, Hart G, Lea-Henry T, Wang H, Nambadan S, Shen Q, Roco JA, Burgio G, Wu P, Cho E, Andrews TD, Field MA, Wu X, Ding H, Guo Q, Shen N, Man SM, Jiang SH, Cook MC, Vinuesa CG. A TNIP1-driven systemic autoimmune disorder with elevated IgG4. Nat Immunol 2024; 25:1678-1691. [PMID: 39060650 DOI: 10.1038/s41590-024-01902-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/18/2024] [Indexed: 07/28/2024]
Abstract
Whole-exome sequencing of two unrelated kindreds with systemic autoimmune disease featuring antinuclear antibodies with IgG4 elevation uncovered an identical ultrarare heterozygous TNIP1Q333P variant segregating with disease. Mice with the orthologous Q346P variant developed antinuclear autoantibodies, salivary gland inflammation, elevated IgG2c, spontaneous germinal centers and expansion of age-associated B cells, plasma cells and follicular and extrafollicular helper T cells. B cell phenotypes were cell-autonomous and rescued by ablation of Toll-like receptor 7 (TLR7) or MyD88. The variant increased interferon-β without altering nuclear factor kappa-light-chain-enhancer of activated B cells signaling, and impaired MyD88 and IRAK1 recruitment to autophagosomes. Additionally, the Q333P variant impaired TNIP1 localization to damaged mitochondria and mitophagosome formation. Damaged mitochondria were abundant in the salivary epithelial cells of Tnip1Q346P mice. These findings suggest that TNIP1-mediated autoimmunity may be a consequence of increased TLR7 signaling due to impaired recruitment of downstream signaling molecules and damaged mitochondria to autophagosomes and may thus respond to TLR7-targeted therapeutics.
Collapse
Affiliation(s)
- Arti Medhavy
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Vicki Athanasopoulos
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Katharine Bassett
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Yuke He
- China Australia Center for Personalized Immunology, Shanghai Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Maurice Stanley
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Daniel Enosi Tuipulotu
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Jean Cappello
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Grant J Brown
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Paula Gonzalez-Figueroa
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Cynthia Turnbull
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Somasundhari Shanmuganandam
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Padmaja Tummala
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Gemma Hart
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Tom Lea-Henry
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Hao Wang
- Francis Crick Institute, London, UK
| | - Sonia Nambadan
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | | | - Jonathan A Roco
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Gaetan Burgio
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Phil Wu
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Eun Cho
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - T Daniel Andrews
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Matt A Field
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
- Center for Tropical Bioinformatics and Molecular Biology, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Queensland, Australia
| | - Xiaoqian Wu
- China Australia Center for Personalized Immunology, Shanghai Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Huihua Ding
- Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Qiang Guo
- Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Nan Shen
- China Australia Center for Personalized Immunology, Shanghai Renji Hospital, Shanghai Jiaotong University, Shanghai, China
- Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Si Ming Man
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Simon H Jiang
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Matthew C Cook
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Carola G Vinuesa
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia.
- China Australia Center for Personalized Immunology, Shanghai Renji Hospital, Shanghai Jiaotong University, Shanghai, China.
- Francis Crick Institute, London, UK.
| |
Collapse
|
2
|
Qi P, Liu X, Li C, Xu Q, Hu L, Duan H, Zhao G, Lin J. Progranulin Protects against Aspergillus fumigatus Keratitis by Attenuating the Inflammatory Response through Enhancing Autophagy. ACS Infect Dis 2024; 10:2826-2835. [PMID: 38900967 DOI: 10.1021/acsinfecdis.4c00236] [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] [Indexed: 06/22/2024]
Abstract
Fungal keratitis (FK) is a severe corneal condition caused by pathogenic fungi and is associated with the virulence of fungi and an excessive tissue inflammatory response. Progranulin (PGRN), functioning as a multifunctional growth factor, exerts a pivotal influence on the regulation of inflammation and autophagy. The aim of our research was to analyze the role of PGRN in Aspergillus fumigatus (A. fumigatus) keratitis. We found that PGRN expression was increased in the mouse cornea with A. fumigatus keratitis. In our experiments, corneas of mice with FK were treated with 100 ng/mL of PGRN. In vitro, RAW 264.7 cells were treated with 10 ng/mL of PGRN before A. fumigatus stimulation. The findings suggested that PGRN effectively alleviated corneal edema and decreased the expression of pro-inflammatory cytokines in mice. In stimulated RAW 264.7 cells, PGRN treatment suppressed the expression of pro-inflammatory cytokines IL-6 and TNF-α but promoted the expression of the anti-inflammatory cytokines IL-10. PGRN treatment significantly upregulated the expression of autophagy-related proteins LC3, Beclin-1, and Atg-7. 3-Methyladenine (3-MA, autophagy inhibitor) reversed the regulation of inflammatory cytokines by PGRN. In addition, our study demonstrated that PGRN also enhanced phagocytosis in RAW 264.7 cells. In summary, PGRN attenuated the inflammatory response of A. fumigatus keratitis by increasing autophagy and enhanced the phagocytic activity of RAW 264.7 cells. This showed that PGRN had a protective effect on A. fumigatus keratitis.
Collapse
Affiliation(s)
- Pingli Qi
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Xing Liu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Cui Li
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Qiang Xu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Liting Hu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Huijin Duan
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Jing Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| |
Collapse
|
3
|
Yu Q, Ding J, Li S, Li Y. Autophagy in cancer immunotherapy: Perspective on immune evasion and cell death interactions. Cancer Lett 2024; 590:216856. [PMID: 38583651 DOI: 10.1016/j.canlet.2024.216856] [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: 03/04/2024] [Revised: 03/22/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
Both the innate and adaptive immune systems work together to produce immunity. Cancer immunotherapy is a novel approach to tumor suppression that has arisen in response to the ineffectiveness of traditional treatments like radiation and chemotherapy. On the other hand, immune evasion can diminish immunotherapy's efficacy. There has been a lot of focus in recent years on autophagy and other underlying mechanisms that impact the possibility of cancer immunotherapy. The primary feature of autophagy is the synthesis of autophagosomes, which engulf cytoplasmic components and destroy them by lysosomal degradation. The planned cell death mechanism known as autophagy can have opposite effects on carcinogenesis, either increasing or decreasing it. It is autophagy's job to maintain the balance and proper functioning of immune cells like B cells, T cells, and others. In addition, autophagy controls whether macrophages adopt the immunomodulatory M1 or M2 phenotype. The ability of autophagy to control the innate and adaptive immune systems is noteworthy. Interleukins and chemokines are immunological checkpoint chemicals that autophagy regulates. Reducing antigen presentation to induce immunological tolerance is another mechanism by which autophagy promotes cancer survival. Therefore, targeting autophagy is of importance for enhancing potential of cancer immunotherapy.
Collapse
Affiliation(s)
- Qiang Yu
- Department of Digestive Surgery, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Jiajun Ding
- Department of Thyroid, Breast and Vascular Surgery, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Shisen Li
- Department of Digestive Surgery, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Yunlong Li
- Department of Digestive Surgery, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China.
| |
Collapse
|
4
|
Schimanski J, Gresnigt MS, Brunner E, Werz O, Hube B, Garscha U. Hyphal-associated protein expression is crucial for Candida albicans-induced eicosanoid biosynthesis in immune cells. Eur J Immunol 2024; 54:e2350743. [PMID: 38233139 DOI: 10.1002/eji.202350743] [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: 08/29/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/19/2024]
Abstract
Candida albicans causes opportunistic infections ranging from mucosal mycoses to life-threatening systemic infections in immunocompromised patients. During C. albicans infection, leukotrienes and prostaglandins are formed from arachidonic acid by 5-lipoxygenase (5-LOX) and cyclooxygenases, respectively to amplify inflammatory conditions, but also to initiate macrophage infiltration to achieve tissue homeostasis. Since less is known about the cellular mechanisms triggering such lipid mediator biosynthesis, we investigated the eicosanoid formation in monocyte-derived M1 and M2 macrophages, neutrophils and HEK293 cells transfected with 5-LOX and 5-LOX-activating protein (FLAP) in response to C. albicans yeast or hyphae. Leukotriene biosynthesis was exclusively induced by hyphae in neutrophils and macrophages, whereas prostaglandin E2 was also formed in response to yeast cells by M1 macrophages. Eicosanoid biosynthesis was significantly higher in M1 compared to M2 macrophages. In HEK_5-LOX/FLAP cells only hyphae activated the essential 5-LOX translocation to the nuclear membrane. Using yeast-locked C. albicans mutants, we demonstrated that hyphal-associated protein expression is critical in eicosanoid formation. For neutrophils and HEK_5-LOX/FLAP cells, hyphal wall protein 1 was identified as the essential surface protein that stimulates leukotriene biosynthesis. In summary, our data suggest that hyphal-associated proteins of C. albicans are central triggers of eicosanoid biosynthesis in human phagocytes.
Collapse
Affiliation(s)
- Jana Schimanski
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Greifswald University, Greifswald, Germany
| | - Mark S Gresnigt
- Junior Research Group Adaptive Pathogenicity Strategies, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Jena, Germany
| | - Elena Brunner
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich-Schiller University Jena, Jena, Germany
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich-Schiller University Jena, Jena, Germany
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knoell Institute, Jena, Germany
- Institute for Microbiology, Friedrich Schiller University, Jena, Germany
| | - Ulrike Garscha
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Greifswald University, Greifswald, Germany
| |
Collapse
|
5
|
Zhang FY, Lian N, Li M. Macrophage pyroptosis induced by Candida albicans. Pathog Dis 2024; 82:ftae003. [PMID: 38499444 PMCID: PMC11162155 DOI: 10.1093/femspd/ftae003] [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: 07/02/2023] [Revised: 10/21/2023] [Accepted: 03/15/2024] [Indexed: 03/20/2024] Open
Abstract
Candida albicans (C. albicans) is a prevalent opportunistic pathogen that causes mucocutaneous and systemic infections, particularly in immunocompromised individuals. Macrophages play a crucial role in eliminating C. albicans in local and bloodstream contexts, while also regulating antifungal immune responses. However, C. albicans can induce macrophage lysis through pyroptosis, a type of regulated cell death. This process can enable C. albicans to escape from immune cells and trigger the release of IL-1β and IL-18, which can impact both the host and the pathogen. Nevertheless, the mechanisms by which C. albicans triggers pyroptosis in macrophages and the key factors involved in this process remain unclear. In this review, we will explore various factors that may influence or trigger pyroptosis in macrophages induced by C. albicans, such as hypha, ergosterol, cell wall remodeling, and other virulence factors. We will also examine the possible immune response following macrophage pyroptosis.
Collapse
Affiliation(s)
- Feng-yuan Zhang
- Hospital for Skin Diseases, Institute of Dermatology,Chinese Academy of Medical Sciences & Peking Union Medical College, 12th. JiangWangmiao street, Nanjing, 210042, China
| | - Ni Lian
- Hospital for Skin Diseases, Institute of Dermatology,Chinese Academy of Medical Sciences & Peking Union Medical College, 12th. JiangWangmiao street, Nanjing, 210042, China
| | - Min Li
- Hospital for Skin Diseases, Institute of Dermatology,Chinese Academy of Medical Sciences & Peking Union Medical College, 12th. JiangWangmiao street, Nanjing, 210042, China
- Center for Global Health, School of Public Health, Nanjing Medical University, 101st. LongMian Avenue, Nanjing, 211166, China
| |
Collapse
|
6
|
Li D, Wang L, Zhao Z, Bai C, Li X. Autophagy and LC3-associated phagocytosis contribute negatively to the killing capability of THP-1-derived macrophages against Candida albicans at the mid-stage. Immunol Lett 2023; 263:25-32. [PMID: 37717912 DOI: 10.1016/j.imlet.2023.09.006] [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: 04/03/2023] [Revised: 09/04/2023] [Accepted: 09/15/2023] [Indexed: 09/19/2023]
Abstract
In innate immunity, macrophages play critical roles in defending against pathogens via the lysosomal degradation function of autophagy. Two distinct autophagy pathways have been identified in decades: canonical autophagy (referred to as autophagy) and LC3-associated phagocytosis (LAP). Since several conflicting findings about the anti-Candida capability of autophagy (or LAP) have been reported, they serve as the foe or friend for Candida survival is still unclearly. The current study showed that the fungicidal process of THP-1-derived macrophages (THP-1-MФ) against Candida albicans is divided into three stages as follows, the early stage (the first 12 h, increasing in the killing capability), the mid-stage (12-24 h, no change in killing capability), and the late stage (24-48 h, decreasing of the killing capability). Autophagic protein LC3B-II reached the peak in THP-1-MФ after 24 h inoculated either with C.albicans or whole glucan particles (WGP). Thus, both anti-Candida roles of autophagy and the LAP pathway have been detected at the mid-stage. For autophagy, after 24 h inoculation with C.albicans, ULK1 increased, but p-ATG13(s318) decreased obviously in THP-1-MФ, and the killing assay showed that autophagy is unhelpful for Candida killing capability. For the LAP pathway, Rubicon and ROS raised significantly in THP-1-MФ after 24 h inoculated with C.albicans; each inhibition would sharply cut down the LC3B-II accumulation, which indicated that LAP had been induced. However, mCherry-GFP-LC3 fluorescent assay exhibited that LAP phago-lysosomal fusion has been blocked, and Rubicon knockdown facilitated the Candida killing activity. These data indicated that autophagy presented as redundant to Candida defense, and LAP phago-lysosomal fusion obstruction impairs the Candida killing capability of THP-1-MФ at the mid-stage. That may explain the no change in Candida killing capability at the mid-stage.
Collapse
Affiliation(s)
- Ding Li
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.
| | - Lin Wang
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Zhihong Zhao
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Changsen Bai
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Xichuan Li
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, China.
| |
Collapse
|
7
|
Zhang X, Dai M, Li S, Li M, Cheng B, Ma T, Zhou Z. The emerging potential role of p62 in cancer treatment by regulating metabolism. Trends Endocrinol Metab 2023:S1043-2760(23)00106-6. [PMID: 37349161 DOI: 10.1016/j.tem.2023.05.004] [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] [Received: 04/02/2023] [Revised: 05/17/2023] [Accepted: 05/22/2023] [Indexed: 06/24/2023]
Abstract
p62 is an important multifunctional adaptor protein participating in autophagy and many other activities. Many studies have revealed that p62 is highly expressed in multiple cancers and decreasing its level can effectively lower the proliferation ability of cancer cells. Moreover, much research has highlighted the significant role of the regulation of cancer cell metabolism in helping to treat tumors. Recent reports demonstrate that p62 could regulate cancer cell metabolism through various mechanisms. However, the relationship between p62 and cancer cell metabolism as well as the related mechanisms has not been fully elucidated. In this review, we describe glucose, glutamine, and fatty acid metabolism in tumor cells and some signaling pathways that can regulate cancer metabolism and are mediated by p62.
Collapse
Affiliation(s)
- Xiaochuan Zhang
- Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, China
| | - Mengge Dai
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Shaotong Li
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Meng Li
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Bing Cheng
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Ting Ma
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China.
| | - Zheng Zhou
- Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, China.
| |
Collapse
|
8
|
Huang XW, Lu S, Pan W, Zhong MZ, Chai JW, Liu YH, Zeng K, Xi LY. Autophagy benefits the in vitro and in vivo clearance of Talaromyces marneffei. Microb Pathog 2023; 180:106146. [PMID: 37150309 DOI: 10.1016/j.micpath.2023.106146] [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: 04/06/2023] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 05/09/2023]
Abstract
Talaromycosis, namely Talaromyces marneffei infection, is increasing gradually and has a high mortality rate even under antifungal therapy. Although autophagy acts differently on different pathogens, it is a promising therapeutic strategy. However, information on autophagy in macrophages and animals upon infection by T. marneffei is still limited. Therefore, several models were employed here to investigate the role of autophagy in host defense against T. marneffei, including RAW264.7 macrophages as in vitro models, different types of Caenorhabditis elegans and BALB/c mice as in vivo models. We applied the clinical T. marneffei isolate SUMS0152 in this study. T. marneffei-infected macrophages exhibit increased formation of autophagosomes. Further, macrophage autophagy promoted by rapamycin or Earle's balanced salt solution (EBSS) inhibited the viability of intracellular T. marneffei. In vivo, compared with uninfected Caenorhabditis elegans, the wild-type nematodes upregulated the expression of the autophagy-related gene lgg-1 and atg-18, and nematodes carrying GFP reporter were induced to form autophagosomes (GFP::LGG-1) after T. marneffei infection. Furthermore, the knockdown of lgg-1 significantly reduced the survival rate of T. marneffei-infected nematodes. Likewise, the autophagy activator rapamycin reduced the fungal burden and suppressed lung inflammation in a mouse model of infection. In conclusion, autophagy is essential for host defense against T. marneffei in vitro and in vivo. Therefore, autophagy may be an attractive target for developing new therapeutics to treat talaromycosis.
Collapse
Affiliation(s)
- Xiao-Wen Huang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Sha Lu
- Department of Dermatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 West Yanjiang Rd., Guangzhou, 510120, China
| | - Wen Pan
- Division of Infectious Diseases, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI, 02903, USA
| | - Mei-Zhen Zhong
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jin-Wei Chai
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Ying-Hui Liu
- Dermatology Department, Dermatology Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Kang Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Li-Yan Xi
- Department of Dermatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 West Yanjiang Rd., Guangzhou, 510120, China; Dermatology Department, Dermatology Hospital, Southern Medical University, Guangzhou, 510515, China.
| |
Collapse
|
9
|
Guan M, Yao L, Zhen Y, Song Y, Liu X, Liu Y, Chen R, Cui Y, Li S. Sporothrix globosa melanin regulates autophagy via the TLR2 signaling pathway in THP-1 macrophages. PLoS Negl Trop Dis 2023; 17:e0011281. [PMID: 37141335 DOI: 10.1371/journal.pntd.0011281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 05/19/2023] [Accepted: 03/28/2023] [Indexed: 05/06/2023] Open
Abstract
Melanin, an important virulence factor of pathogenic fungi, has been shown to suppress host immune responses in multiple ways. Autophagy is a vital cellular mechanism underlying the host's innate immunity against microbial infections. However, the potential influence of melanin on autophagy has not been explored. We investigated the effect of melanin on autophagy in macrophages, which play a key role in controlling Sporothrix spp. infection, as well as the mechanism of melanin interaction with Toll-like receptor (TLR)-induced pathways. Sporothrix globosa conidia (wild-type and melanin-deficient mutant strains) or yeast cells were co-cultured with THP-1 macrophages to demonstrate that, although S. globosa infection led to the activation of autophagy-related proteins and increased autophagic flux, S. globosa melanin suppressed macrophage autophagy. Incubation with S. globosa conidia also increased the expression levels of reactive oxygen species and multiple proinflammatory cytokines (interleukin-6, tumor necrosis factor-α, interleukin-1β and interferon-γ) in macrophages. These effects were attenuated as melanin presented. Furthermore, while S. globosa conidia significantly increased the expression of both TLR2 and TLR4 in macrophages, the knockdown of TLR2, but not TLR4, with small interfering RNA suppressed autophagy. Overall, this study revealed the novel immune defense ability of S. globosa melanin to inhibit macrophage functionality by resisting macrophage autophagy through the regulation of TLR2 expression.
Collapse
Affiliation(s)
- Mengqi Guan
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Lei Yao
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Yu Zhen
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Yang Song
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Xiaobo Liu
- Laboratory of Cancer Precision Medicine, First Hospital of Jilin University, Changchun, China
| | - Yuanyuan Liu
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Ruili Chen
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
- Department of Dermatology and Venereology, Zhuhai People's Hospital, Zhuhai, China
| | - Yan Cui
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| | - Shanshan Li
- Department of Dermatology and Venereology, First Hospital of Jilin University, Changchun, China
| |
Collapse
|
10
|
Műzes G, Sipos F. Autoimmunity and Carcinogenesis: Their Relationship under the Umbrella of Autophagy. Biomedicines 2023; 11:biomedicines11041130. [PMID: 37189748 DOI: 10.3390/biomedicines11041130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 04/11/2023] Open
Abstract
The immune system and autophagy share a functional relationship. Both innate and adaptive immune responses involve autophagy and, depending on the disease’s origin and pathophysiology, it may have a detrimental or positive role on autoimmune disorders. As a “double-edged sword” in tumors, autophagy can either facilitate or impede tumor growth. The autophagy regulatory network that influences tumor progression and treatment resistance is dependent on cell and tissue types and tumor stages. The connection between autoimmunity and carcinogenesis has not been sufficiently explored in past studies. As a crucial mechanism between the two phenomena, autophagy may play a substantial role, though the specifics remain unclear. Several autophagy modifiers have demonstrated beneficial effects in models of autoimmune disease, emphasizing their therapeutic potential as treatments for autoimmune disorders. The function of autophagy in the tumor microenvironment and immune cells is the subject of intensive study. The objective of this review is to investigate the role of autophagy in the simultaneous genesis of autoimmunity and malignancy, shedding light on both sides of the issue. We believe our work will assist in the organization of current understanding in the field and promote additional research on this urgent and crucial topic.
Collapse
Affiliation(s)
- Györgyi Műzes
- Immunology Division, Department of Internal Medicine and Hematology, Semmelweis University, 1088 Budapest, Hungary
| | - Ferenc Sipos
- Immunology Division, Department of Internal Medicine and Hematology, Semmelweis University, 1088 Budapest, Hungary
| |
Collapse
|
11
|
Sitnova A, Svetozarskiy S. Modern Technologies in Diagnosis of Fungal Keratitis (Review). Sovrem Tekhnologii Med 2023; 15:73-84. [PMID: 37389020 PMCID: PMC10306968 DOI: 10.17691/stm2023.15.2.07] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Indexed: 07/01/2023] Open
Abstract
Traumas and infectious diseases of the eye play a leading role in the development of corneal blindness responsible for 1.5-2 million cases of vision loss per year. To date, the issue of reducing the incidence of fungal keratitis is acute and needs to be solved worldwide. Trauma as a risk factor for corneal fungal disease is thought to be prevalent in developing countries due to agricultural involvement, while in developed countries the onset of the disease is predisposed by medical advances such as contact vision correction and modern ophthalmic surgery. Thorough analysis of the pathogenesis gives the possibility to describe the action of fungal enzymes, biofilm formation, and the resistance mechanism, which on the one hand explains the aggressive course of the disease and difficulties in its diagnosis, and on the other hand, it encourages searching for new methods of diagnosis and treatment. The non-specific clinical picture of fungal keratitis, the variety and availability of antibiotics nowadays become an obstacle for rapid detection of this pathology. Low public awareness and late visit to an ophthalmologist are also a barrier to successful combating the increasing incidence of fungal keratitis. Belated diagnosis, increasing resistance of fungi to antibiotics, and lack of registered antifungal ophthalmic drugs justify poor treatment efficacy resulting in decreased visual acuity or vision loss. Existing diagnostic methods need systematization and detailed comparison, identifying the advantages and disadvantages of each. This review considers causative agents and their influence on pathogenesis of the disease, describes difficulties of fungal keratitis diagnosis and possible ways of overcoming these problems using new developments, and also outlines further prospects of research in this direction.
Collapse
Affiliation(s)
- A.V. Sitnova
- 6-year Student, Medical Faculty; Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 603005, Russia
| | - S.N. Svetozarskiy
- Ophthalmologist; Privolzhsky District Medical Center of the Federal Medico-Biological Agency (FMBA), 14 Ilyinskaya St., Nizhny Novgorod, 603000, Russia Tutor, Department of Eye Diseases; Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 603005, Russia
| |
Collapse
|
12
|
Zou L, Sun L, Hua R, Wu Y, Sun L, Chen T. Degradation of Ubiquitin-Editing Enzyme A20 following Autophagy Activation Promotes RNF168 Nuclear Translocation and NF-κB Activation in Lupus Nephritis. J Innate Immun 2023; 15:428-441. [PMID: 36944318 PMCID: PMC10090963 DOI: 10.1159/000527624] [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: 03/15/2021] [Accepted: 09/19/2022] [Indexed: 03/23/2023] Open
Abstract
The correlation between ubiquitin-editing enzyme A20 and E3 ubiquitin ligase ring finger protein (RNF) 168 has been reported to be critical for repair of DNA damage. This study aimed to evaluate the potential role of this regulatory interaction in the pathogenesis of lupus nephritis (LN). The expression of RNF168 and A20 was measured in the podocytes derived from MRL/lpr murine lupus as well as patients with LN. Cell-based studies using renal podocytes bearing silenced RNF168, over-expressed A20, autophagy-related gene (Atg) 5 (a ubiquitin-like modifier), or silenced Atg5 were used to assess the effect of RNF168, A20, and Atg5 on DNA damage repair and nuclear factor kappa-B (NF-κB) activation in LN. It was found that podocyte autophagy was over-activated in LN and the abnormal podocyte autophagy led to down-regulation of A20, up-regulation of RNF168, and activation of the NF-κB. RNF168 silencing or A20 restoration inhibited activation of NF-κB pathway and promoted repair of DNA damage, where the level of autophagy was not changed. Activated A20 in podocytes weakened the promoting action of cell autophagy on RNF168. The current results suggest that RNF168 dysfunction may be involved in the pathogenesis of LN via down-regulation of A20 expression. Autophagy and RNF168 may be therapeutic targets for the prevention and treatment of LN.
Collapse
Affiliation(s)
- Luxi Zou
- School of Management, Xuzhou Medical University, Xuzhou, China
| | - Ling Sun
- Division of Nephrology, Xuzhou Central Hospital, Xuzhou Medical University, Xuzhou, China
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, China
| | - Ruixue Hua
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, China
| | - Yu Wu
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, China
| | - Linlin Sun
- Division of Nephrology, Xuzhou Central Hospital, Xuzhou Medical University, Xuzhou, China
| | - Ting Chen
- Division of Nephrology, Xuzhou Central Hospital, Xuzhou Medical University, Xuzhou, China
| |
Collapse
|
13
|
Chen W, Chang Y, Sun C, Xu M, Dong M, Zhao N, Wang Y, Zhang J, Xu N, Liu W. A novel circular RNA circNLRP3 alleviated ricin toxin-induced TNF-α production through sponging miR-221-5p. Toxicon 2023; 224:107046. [PMID: 36702354 DOI: 10.1016/j.toxicon.2023.107046] [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: 12/10/2022] [Revised: 01/22/2023] [Accepted: 01/22/2023] [Indexed: 01/24/2023]
Abstract
Acting as microRNA (miRNA) sponges, circular RNAs (circRNAs) have been discovered to be critical modulators of inflammatory processes. Ricin Toxin (RT) is highly toxic to mammalian cells and low doses of RT can induce acute inflammation. However, current researches on the underlying mechanism and function of circRNA/miRNA network in RT-induced inflammation are limited. Previously, we found miR-221-5p was aberrant and associated with the inflammation of RT induction. In this study, based on the circRNA high-throughput sequencing (circRNA-seq), we obtained a novel circRNA termed circNLRP3 and revealed that circNLRP3 can sponge miR-221-5p, release its target mRNA A20, and further suppress NF-κB signaling pathway to alleviated RT-induced TNF-α production. Our findings elucidated a possible mechanistic link between the circNLRP3/miR-221-5p/A20 axis and RT-induced inflammatory response, which may broaden our understanding of RT poisoning.
Collapse
Affiliation(s)
- Wei Chen
- Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji, 133002, Jilin, PR China
| | - Ying Chang
- Jilin Medical University, Jilin, 132013, Jilin, PR China
| | - Chengbiao Sun
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Meng Xu
- College of Life Science, Jilin Agricultural University, Changchun, 130118, Jilin, PR China
| | - Mingxin Dong
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Na Zhao
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Yan Wang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Jianxu Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Na Xu
- Jilin Medical University, Jilin, 132013, Jilin, PR China.
| | - Wensen Liu
- Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji, 133002, Jilin, PR China; Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China.
| |
Collapse
|
14
|
Parackova Z, Zentsova I, Vrabcova P, Sediva A, Bloomfield M. Aberrant tolerogenic functions and proinflammatory skew of dendritic cells in STAT1 gain-of-function patients may contribute to autoimmunity and fungal susceptibility. Clin Immunol 2023; 246:109174. [PMID: 36372319 DOI: 10.1016/j.clim.2022.109174] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/25/2022] [Accepted: 11/01/2022] [Indexed: 11/13/2022]
Abstract
STAT1 gain-of-function (GOF) mutations underlie an inborn error of immunity hallmarked by chronic mucocutaneous candidiasis (CMC). Beyond the fungal susceptibility, attributed to Th17 failure, over half of the reported patients suffer from autoimmune manifestations, mechanism of which has not been explained yet. We hypothesized that the STAT1 mutations would affect dendritic cells' (DCs) properties and alter their inflammatory and tolerogenic functions. To test the hypothesis, we generated monocyte-derived DCs (moDCs) and tolerogenic DCs (tDCs). Functional and signaling studies, co-culture experiments and RNA sequencing demonstrated that STAT1 GOF DCs were profoundly altered in their phenotype and functions, characterized by loss of tolerogenic functions, proinflammatory skew and decreased capacity to induce Th17. Cytokine signaling, autophagy and metabolic processes were identified as the most prominently altered cellular processes. The results suggest that DCs are directly involved in STAT1 GOF-associated immune pathology, possibly contributing to both autoimmune manifestations and the failure of antifungal defense.
Collapse
Affiliation(s)
- Zuzana Parackova
- Department of Immunology, 2nd Faculty of Medicine Charles University, University Hospital in Motol, V Uvalu 84, Prague, Czech Republic.
| | - Irena Zentsova
- Department of Immunology, 2nd Faculty of Medicine Charles University, University Hospital in Motol, V Uvalu 84, Prague, Czech Republic
| | - Petra Vrabcova
- Department of Immunology, 2nd Faculty of Medicine Charles University, University Hospital in Motol, V Uvalu 84, Prague, Czech Republic
| | - Anna Sediva
- Department of Immunology, 2nd Faculty of Medicine Charles University, University Hospital in Motol, V Uvalu 84, Prague, Czech Republic
| | - Marketa Bloomfield
- Department of Immunology, 2nd Faculty of Medicine Charles University, University Hospital in Motol, V Uvalu 84, Prague, Czech Republic
| |
Collapse
|
15
|
Gu L, Li C, Peng X, Lin H, Niu Y, Zheng H, Zhao G, Lin J. Flavopiridol Protects against Fungal Keratitis due to Aspergillus fumigatus by Alleviating Inflammation through the Promotion of Autophagy. ACS Infect Dis 2022; 8:2362-2373. [PMID: 36283079 DOI: 10.1021/acsinfecdis.2c00427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Fungal keratitis is a serious infectious keratopathy related to fungal virulence and excessive inflammatory responses. Autophagy exhibits a potent ability to resolve inflammation during fungal infection. This study aimed to investigate the protective function of flavopiridol in Aspergillus fumigatus keratitis and explore its effects on autophagy. In our study, the corneas of the fungal keratitis mouse model were treated with 5 μM flavopiridol. In vitro, RAW 264.7 cells were pretreated with 200 nM flavopiridol before fungal stimulation. A. fumigatus was incubated with flavopiridol, and the antifungal activity of flavopiridol was detected. Our results indicated that flavopiridol treatment notably reduced clinical scores as well as cytokines expression of infected corneas. In infected RAW 264.7 cells, flavopiridol treatment inhibited IL-1β, IL-6, and TNF-α expression but promoted IL-10 expression. Transmission electron microscopy (TEM) images showed that more autolysosomes were present in infected corneas and RAW 264.7 cells after flavopiridol treatment. Flavopiridol treatment notably upregulated the protein expression of LC3, Beclin-1, and Atg-7. 3-Methyladenine (3-MA, an inhibitor of autophagy) pretreatment counteracted the cytokine regulation induced by flavopiridol. Moreover, flavopiridol promoted the phagocytosis of RAW 264.7 cells. Flavopiridol also exhibited antifungal activity by restricting fungal growth and limiting fungal biofilm formation and conidial adhesion. In conclusion, flavopiridol significantly alleviated the inflammation of fungal keratitis by activating autophagy. In addition, flavopiridol promoted the phagocytosis of RAW 264.7 cells and exhibited antifungal function, indicating the potential therapeutic role of flavopiridol in fungal keratitis.
Collapse
Affiliation(s)
- Lingwen Gu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Cui Li
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Xudong Peng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Hao Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Yawen Niu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Hengrui Zheng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Jing Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| |
Collapse
|
16
|
Abstract
Macroautophagy/autophagy, a fundamental cell process for nutrient recycling and defense against pathogens (termed xenophagy), is crucial to human health. ATG16L2 (autophagy related 16 like 2) is an autophagic protein and a paralog of ATG16L1. Both proteins are implicated in similar diseases such as cancer and other chronic diseases; however, most autophagy studies to date have primarily focused on the function of ATG16L1, with ATG16L2 remaining uncharacterized and understudied. Overexpression of ATG16L2 has been reported in various cancers including colorectal, gastric, and prostate carcinomas, whereas altered methylation of ATG16L2 has been associated with lung cancer formation and poorer response to therapy in leukemia. In addition, ATG16L2 polymorphisms have been implicated in a range of other diseases including inflammatory bowel diseases and neurodegenerative disorders. Despite this likely role in human health, the function of this enigmatic protein in autophagy remains unknown. Here, we review current studies on ATG16L2 and collate evidence that suggests that this protein is a potential modulator of autophagy as well as the implications this has on pathogenesis.Abbreviations: ATG5: autophagy related 5; ATG12: autophagy related 12; ATG16L1: autophagy related 16 like 1; ATG16L2: autophagy related 16 like 2; CD: Crohn disease; IBD: inflammatory bowel diseases; IRGM: immunity related GTPase M; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; PE: phosphatidylethanolamine; RB1CC1: RB1 inducible coiled-coil 1; SLE: systemic lupus erythematosus; WIPI2B: WD repeat domain, phosphoinositide interacting 2B.
Collapse
Affiliation(s)
- Laurence Don Wai Luu
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia,CONTACT Laurence Don Wai Luu School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Nadeem O. Kaakoush
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Natalia Castaño-Rodríguez
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia,Natalia Castaño-Rodríguez School of Biotechnology and Biomolecular Sciences, Faculty of Science, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia
| |
Collapse
|
17
|
Cheung MD, Erman EN, Moore KH, Lever JM, Li Z, LaFontaine JR, Ghajar-Rahimi G, Liu S, Yang Z, Karim R, Yoder BK, Agarwal A, George JF. Resident macrophage subpopulations occupy distinct microenvironments in the kidney. JCI Insight 2022; 7:e161078. [PMID: 36066976 PMCID: PMC9714795 DOI: 10.1172/jci.insight.161078] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
The kidney contains a population of resident macrophages from birth that expands as it grows and forms a contiguous network throughout the tissue. Kidney-resident macrophages (KRMs) are important in homeostasis and the response to acute kidney injury. While the kidney contains many microenvironments, it is unknown whether KRMs are a heterogeneous population differentiated by function and location. We combined single-cell RNA-Seq (scRNA-Seq), spatial transcriptomics, flow cytometry, and immunofluorescence imaging to localize, characterize, and validate KRM populations during quiescence and following 19 minutes of bilateral ischemic kidney injury. scRNA-Seq and spatial transcriptomics revealed 7 distinct KRM subpopulations, which are organized into zones corresponding to regions of the nephron. Each subpopulation was identifiable by a unique transcriptomic signature, suggesting distinct functions. Specific protein markers were identified for 2 clusters, allowing analysis by flow cytometry or immunofluorescence imaging. Following injury, the original localization of each subpopulation was lost, either from changing locations or transcriptomic signatures. The original spatial distribution of KRMs was not fully restored for at least 28 days after injury. The change in KRM localization confirmed a long-hypothesized dysregulation of the local immune system following acute injury and may explain the increased risk for chronic kidney disease.
Collapse
Affiliation(s)
- Matthew D. Cheung
- Department of Surgery
- Department of Nephrology Research and Training Center
| | - Elise N. Erman
- Department of Surgery
- Department of Nephrology Research and Training Center
| | - Kyle H. Moore
- Department of Surgery
- Department of Nephrology Research and Training Center
| | | | - Zhang Li
- Department of Cellular Developmental and Integrative Biology
| | | | - Gelare Ghajar-Rahimi
- Department of Nephrology Research and Training Center
- Department of Medicine, and
| | | | | | - Rafay Karim
- Department of Surgery
- Department of Nephrology Research and Training Center
| | | | - Anupam Agarwal
- Department of Nephrology Research and Training Center
- Department of Medicine, and
- Department of Veterans Affairs, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - James F. George
- Department of Surgery
- Department of Nephrology Research and Training Center
| |
Collapse
|
18
|
Reyes EY, Shinohara ML. Host immune responses in the central nervous system during fungal infections. Immunol Rev 2022; 311:50-74. [PMID: 35672656 PMCID: PMC9489659 DOI: 10.1111/imr.13101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/24/2022] [Accepted: 05/18/2022] [Indexed: 12/19/2023]
Abstract
Fungal infections in the central nervous system (CNS) cause high morbidity and mortality. The frequency of CNS mycosis has increased over the last two decades as more individuals go through immunocompromised conditions for various reasons. Nevertheless, options for clinical interventions for CNS mycoses are still limited. Thus, there is an urgent need to understand the host-pathogen interaction mechanisms in CNS mycoses for developing novel treatments. Although the CNS has been regarded as an immune-privileged site, recent studies demonstrate the critical involvement of immune responses elicited by CNS-resident and CNS-infiltrated cells during fungal infections. In this review, we discuss mechanisms of fungal invasion in the CNS, fungal pathogen detection by CNS-resident cells (microglia, astrocytes, oligodendrocytes, neurons), roles of CNS-infiltrated leukocytes, and host immune responses. We consider that understanding host immune responses in the CNS is crucial for endeavors to develop treatments for CNS mycosis.
Collapse
Affiliation(s)
- Estefany Y. Reyes
- Department of Immunology, Duke University School of Medicine, Durham, NC 27705, USA
| | - Mari L. Shinohara
- Department of Immunology, Duke University School of Medicine, Durham, NC 27705, USA
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27705, USA
| |
Collapse
|
19
|
Autophagy-Associated Immunogenic Modulation and Its Applications in Cancer Therapy. Cells 2022; 11:cells11152324. [PMID: 35954167 PMCID: PMC9367255 DOI: 10.3390/cells11152324] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/24/2022] [Accepted: 07/27/2022] [Indexed: 11/17/2022] Open
Abstract
Autophagy, a lysosome-mediated cellular degradation pathway, recycles intracellular components to maintain metabolic balance and survival. Autophagy plays an important role in tumor immunotherapy as a “double-edged sword” that can both promote and inhibit tumor progression. Autophagy acts on innate and adaptive immunity and interacts with immune cells to modulate tumor immunotherapy. The discovery of autophagy inducers and autophagy inhibitors also provides new insights for clinical anti-tumor therapy. However, there are also difficulties in the application of autophagy-related regulators, such as low bioavailability and the lack of efficient selectivity. This review focuses on autophagy-related immunogenic regulation and its application in cancer therapy.
Collapse
|
20
|
Cheung MD, Agarwal A, George JF. Where Are They Now: Spatial and Molecular Diversity of Tissue-Resident Macrophages in the Kidney. Semin Nephrol 2022; 42:151276. [PMID: 36435683 DOI: 10.1016/j.semnephrol.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Kidney resident macrophages (KRMs) are involved in homeostasis, phagocytosis, defense against infectious agents, response to insults, inflammation, and tissue repair. They also play critical roles in the pathogenesis and recovery from many kidney diseases such as acute kidney injury. KRMs historically have been studied as one homogenous population, but the wide-ranging roles and phenotypes observed suggest that there is greater heterogeneity than previously understood. Advancements in RNA sequencing technologies (single-cell RNA sequencing and spatial transcriptomics) have identified specific subsets of KRMs that are molecularly, functionally, and spatially distinct with dynamic changes after kidney injury. Multiple studies have identified unique markers that represent these subpopulations, permitting further characterization of the function and roles they play in the kidney. Understanding the diversity of KRM subpopulations will be key in the development of novel therapies used in treating kidney diseases and promoting kidney health.
Collapse
Affiliation(s)
- Matthew D Cheung
- Department of Surgery, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Department of Medicine, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Nephrology Research and Training Center, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama
| | - Anupam Agarwal
- Department of Medicine, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Nephrology Research and Training Center, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Department of Veteran Affairs, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama
| | - James F George
- Department of Surgery, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Nephrology Research and Training Center, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama.
| |
Collapse
|
21
|
Huang Z, Zhang H, Fu X, Han L, Zhang H, Zhang L, Zhao J, Xiao D, Li H, Li P. Autophagy-driven neutrophil extracellular traps: The dawn of sepsis. Pathol Res Pract 2022; 234:153896. [PMID: 35462228 DOI: 10.1016/j.prp.2022.153896] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/28/2022] [Accepted: 04/11/2022] [Indexed: 12/12/2022]
Abstract
Sepsis is a systemic inflammatory syndrome caused by infection disorders. The core mechanism of sepsis is immune dysfunction. Neutrophils are the most abundant circulating white blood cells, which play a crucial role in mediating the innate immune response. Previous studies have shown that an effective way to treat sepsis is through the regulation of neutrophil functions. Autophagy, a highly conserved degradation process, is responsible for removing denatured proteins or damaged organelles within cells and protecting cells from external stimuli. It is a key homeostasis process that promotes neutrophil function and differentiation. Autophagy has been shown to be closely associated with inflammation and immunity. Neutrophils, the first line of innate immunity, migrate to inflammatory sites upon their activation. Neutrophil-mediated autophagy may participate in the clinical course of sepsis. In this review, we summarized and analyzed the latest research findings on the changes in neutrophil external traps during sepsis, the regulatory role of autophagy in neutrophil, and the potential application of autophagy-driven NETs in sepsis, so as to guide clinical treatment of sepsis.
Collapse
Affiliation(s)
- Zhenzhen Huang
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Haodong Zhang
- Department of Hypertension Center, Lanzhou University Second Hospital, Lanzhou, China
| | - Xu Fu
- Key Laboratory of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Li Han
- Key Laboratory of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Haidan Zhang
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Ling Zhang
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Jing Zhao
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Danyang Xiao
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Hongyao Li
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China
| | - Peiwu Li
- Department of Emergency Medicine, Lanzhou University Second Hospital, Lanzhou, China.
| |
Collapse
|
22
|
Klapan K, Simon D, Karaulov A, Gomzikova M, Rizvanov A, Yousefi S, Simon HU. Autophagy and Skin Diseases. Front Pharmacol 2022; 13:844756. [PMID: 35370701 PMCID: PMC8971629 DOI: 10.3389/fphar.2022.844756] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/22/2022] [Indexed: 12/15/2022] Open
Abstract
Autophagy is a highly conserved lysosomal degradation system that involves the creation of autophagosomes, which eventually fuse with lysosomes and breakdown misfolded proteins and damaged organelles with their enzymes. Autophagy is widely known for its function in cellular homeostasis under physiological and pathological settings. Defects in autophagy have been implicated in the pathophysiology of a variety of human diseases. The new line of evidence suggests that autophagy is inextricably linked to skin disorders. This review summarizes the principles behind autophagy and highlights current findings of autophagy's role in skin disorders and strategies for therapeutic modulation.
Collapse
Affiliation(s)
- Kim Klapan
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Dagmar Simon
- Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Alexander Karaulov
- Department of Clinical Immunology and Allergology, Sechenov University, Moscow, Russia
| | - Marina Gomzikova
- Laboratory of Molecular Immunology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Albert Rizvanov
- Laboratory of Molecular Immunology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Shida Yousefi
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Hans-Uwe Simon
- Institute of Pharmacology, University of Bern, Bern, Switzerland.,Department of Clinical Immunology and Allergology, Sechenov University, Moscow, Russia.,Laboratory of Molecular Immunology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia.,Institute of Biochemistry, Brandenburg Medical School, Neuruppin, Germany
| |
Collapse
|
23
|
Lapaquette P, Ducreux A, Basmaciyan L, Paradis T, Bon F, Bataille A, Winckler P, Hube B, d’Enfert C, Esclatine A, Dubus E, Bringer MA, Morel E, Dalle F. Membrane protective role of autophagic machinery during infection of epithelial cells by Candida albicans. Gut Microbes 2022; 14:2004798. [PMID: 35086419 PMCID: PMC8803057 DOI: 10.1080/19490976.2021.2004798] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Candida albicans (C. albicans) is an opportunistic pathogen causing infections ranging from superficial to life-threatening disseminated infections. In a susceptible host, C. albicans is able to translocate through the gut barrier, promoting its dissemination into deeper organs. C. albicans hyphae can invade human epithelial cells by two well-documented mechanisms: epithelial-driven endocytosis and C. albicans-driven active penetration. One mechanism by which host cells protect themselves against intracellular C. albicans is termed autophagy. The protective role of autophagy during C. albicans infection has been investigated in myeloid cells; however, far less is known regarding the role of this process during the infection of epithelial cells. In the present study, we investigated the role of autophagy-related proteins during the infection of epithelial cells, including intestinal epithelial cells and gut explants, by C. albicans. Using cell imaging, we show that key molecular players of the autophagy machinery (LC3-II, PI3P, ATG16L1, and WIPI2) were recruited at Candida invasion sites. We deepened these observations by electron microscopy analyses that reveal the presence of autophagosomes in the vicinity of invading hyphae. Importantly, these events occur during active penetration of C. albicans into host cells and are associated with plasma membrane damage. In this context, we show that the autophagy-related key proteins ATG5 and ATG16L1 contribute to plasma membrane repair mediated by lysosomal exocytosis and participate in protecting epithelial cells against C. albicans-induced cell death. Our findings provide a novel mechanism by which epithelial cells, forming the first line of defense against C. albicans in the gut, can react to limit C. albicans invasion.
Collapse
Affiliation(s)
- Pierre Lapaquette
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France,CONTACT Pierre Lapaquette Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France
| | - Amandine Ducreux
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France
| | - Louise Basmaciyan
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France,Laboratoire de Parasitologie-Mycologie, Plateforme de Biologie Hospitalo-Universitaire Gérard Mack, Dijon, France
| | - Tracy Paradis
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France
| | - Fabienne Bon
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France
| | | | - Pascale Winckler
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France,Dimacell Imaging Facility, Agrosup Dijon, INRA, INSERM, Univ. Bourgogne Franche-Comté, Dijon, France
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, Jena, Germany,Institute of Microbiology, Faculty of Biological Sciences, Friedrich Schiller University, Jena, Germany
| | - Christophe d’Enfert
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, USC2019 INRA, Paris, France
| | - Audrey Esclatine
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Elisabeth Dubus
- Centre des Sciences du Goût et de l’Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - Marie-Agnès Bringer
- Centre des Sciences du Goût et de l’Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - Etienne Morel
- Institut Necker Enfants-Malades (INEM), INSERM U1151-CNRS UMR 8253, Université de Paris, Paris, France
| | - Frédéric Dalle
- Univ. Bourgogne Franche-Comté, Agrosup Dijon, UMR PAM A 02.102, Dijon, France,Laboratoire de Parasitologie-Mycologie, Plateforme de Biologie Hospitalo-Universitaire Gérard Mack, Dijon, France,Frédéric Dalle Laboratoire de Parasitologie-Mycologie
| |
Collapse
|
24
|
Matsuda H, Nibe-Shirakihara Y, Tamura A, Aonuma E, Arakawa S, Otsubo K, Nemoto Y, Nagaishi T, Tsuchiya K, Shimizu S, Ma A, Watanabe M, Uo M, Okamoto R, Oshima S. Nickel particles are present in Crohn's disease tissue and exacerbate intestinal inflammation in IBD susceptible mice. Biochem Biophys Res Commun 2022; 592:74-80. [PMID: 35032835 DOI: 10.1016/j.bbrc.2021.12.111] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 12/28/2021] [Indexed: 12/22/2022]
Abstract
Crohn's disease is an inflammatory disease of the gut caused by a complex interplay among genetic, microbial, and environmental factors. The intestinal tract is constantly exposed to metals and other trace elements ingested as food. Synchrotron radiation-induced X-ray fluorescence spectroscopy and X-ray absorption fine structure analysis revealed the deposition of nickel particles within Crohn's disease tissue specimens. After nickel particle stimulation, THP-1 cells showed filopodia formation and autophagic vacuoles containing lipid bodies. Nickel particles precipitated colitis in mice bearing mutations of the IBD susceptibility protein A20/TNFAIP3. Nickel particles also exacerbated dextran sulfate sodium-induced colitis in mice harboring myeloid cell-specific Atg5 deficiency. These findings illustrate that nickel particle ingestion may worsen Crohn's disease by perturbing autophagic processes in the intestine, providing new insights into environmental factors in Crohn's disease pathogenesis.
Collapse
Affiliation(s)
- Hiroki Matsuda
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoichi Nibe-Shirakihara
- Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Japan
| | - Akiko Tamura
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Emi Aonuma
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Satoko Arakawa
- Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Japan
| | - Kana Otsubo
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasuhiro Nemoto
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takashi Nagaishi
- Department of Advanced Therapeutics for G.I. Diseases, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kiichiro Tsuchiya
- Department of Gastroenterology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Shigeomi Shimizu
- Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Japan
| | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Mamoru Watanabe
- Advanced Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motohiro Uo
- Department of Advanced Biomaterials, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ryuichi Okamoto
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shigeru Oshima
- Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| |
Collapse
|
25
|
Zheng Q, Duan L, Zhang Y, Li J, Zhang S, Wang H. A dynamically evolving war between autophagy and pathogenic microorganisms. J Zhejiang Univ Sci B 2022; 23:19-41. [PMID: 35029086 PMCID: PMC8758936 DOI: 10.1631/jzus.b2100285] [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] [Indexed: 11/25/2022]
Abstract
Autophagy is an intracellular degradation process that maintains cellular homeostasis. It is essential for protecting organisms from environmental stress. Autophagy can help the host to eliminate invading pathogens, including bacteria, viruses, fungi, and parasites. However, pathogens have evolved multiple strategies to interfere with autophagic signaling pathways or inhibit the fusion of autophagosomes with lysosomes to form autolysosomes. Moreover, host cell matrix degradation by different types of autophagy can be used for the proliferation and reproduction of pathogens. Thus, determining the roles and mechanisms of autophagy during pathogen infections will promote understanding of the mechanisms of pathogen‒host interactions and provide new strategies for the treatment of infectious diseases.
Collapse
Affiliation(s)
- Qianqian Zheng
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Liangwei Duan
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Yang Zhang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Jiaoyang Li
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Shiyu Zhang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Hui Wang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China. .,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China.
| |
Collapse
|
26
|
Wang Z, Wang G, Wang Y, Liu Q, Li H, Xie P, Wang Z. Omp31 of Brucella Inhibits NF-κB p65 Signaling Pathway by Inducing Autophagy in BV-2 Microglia. Neurochem Res 2021; 46:3264-3272. [PMID: 34536195 DOI: 10.1007/s11064-021-03429-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 02/04/2021] [Accepted: 08/13/2021] [Indexed: 11/28/2022]
Abstract
Neurobrucellosis is a serious central nervous system (CNS) inflammatory disorder caused by Brucella, and outer membrane protein-31 (Omp31) plays an important role in Brucella infection. This study aims to determine whether Omp31 can induce autophagy in BV-2 microglia. Another goal of the study is to further examine the effect of autophagy on the nuclear transcription factor κB (NF-κB) p65 signaling pathway. We observed that Omp31 stimulated autophagy by increasing microtubule-associated protein 1 light chain 3B (LC3B-II) levels and inducing autophagosome formation at 6 h and 12 h. Concomitantly, Omp31 induced tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) expression in a time-dependent manner but reduced the expression of TNF-α at 6 h. We utilized Omp31 with or without rapamycin or 3-methyladenine (3-MA) to treat BV-2 microglia, and it demonstrated further that Omp31 induced autophagy by promoting LC3B-II, Beclin-1 proteins expression and inhibiting the p62 protein levels. Furthermore, we explored the effects of autophagy on the NF-κB p65 pathway through western blot analysis, RT-qPCR assay, enzyme-linked immunosorbent assay (ELISA) and immunofluorescence. The data suggest that Omp31 as well as rapamycin, the autophagy inducer, can decrease TNF-α levels through the inhibition of the NF-κB p65 signaling pathway. Taken together, Omp31 can function as a catalyst in both autophagy induction and NF-κB p65 signal inhibition. Furthermore, Omp31-induced autophagy may inhibit the expression of TNF-α by negatively regulating NF-κB p65 signaling pathway.
Collapse
Affiliation(s)
- Zhao Wang
- Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Guowei Wang
- Neurology Center, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Yanbai Wang
- Neurology Center, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Qiang Liu
- Neurology Center, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Haining Li
- Neurology Center, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Peng Xie
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| | - Zhenhai Wang
- Neurology Center, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China. .,Diagnosis and Treatment Engineering Technology Research Center of Nervous System Diseases of Ningxia Hui Autonomous Region, Yinchuan, Ningxia Hui Autonomous Region, China.
| |
Collapse
|
27
|
Voutsadakis IA. Mutations of p53 associated with pancreatic cancer and therapeutic implications. Ann Hepatobiliary Pancreat Surg 2021; 25:315-327. [PMID: 34402431 PMCID: PMC8382872 DOI: 10.14701/ahbps.2021.25.3.315] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/19/2021] [Accepted: 05/31/2021] [Indexed: 12/30/2022] Open
Abstract
Pancreatic adenocarcinoma is a malignancy with rising incidence and grim prognosis. Despite improvements in therapeutics for treating metastatic pancreatic cancer, this disease is invariably fatal with survival time less than a few years. New molecular understanding of the pathogenesis of pancreatic adenocarcinoma based on efforts led by The Cancer Genome Atlas and other groups has elucidated the landscape of this disease and started to produce therapeutic results, leading to the first introduction of targeted therapies for subsets of pancreatic cancers bearing specific molecular lesions such as BRCA mutations. These efforts have highlighted that subsets of pancreatic cancers are particularly sensitive to chemotherapy. The most common molecular lesions in pancreatic adenocarcinomas are mutations in an oncogene KRAS and the TP53 gene that encodes for tumor suppressor protein p53. This paper will review the landscape of pancreatic cancers, focusing on mutations of p53, a major tumor suppressor protein, in pancreatic cancers and possible therapeutic repercussions.
Collapse
Affiliation(s)
- Ioannis A Voutsadakis
- Algoma District Cancer Program, Sault Area Hospital, Sault Ste. Marie, ON, Canada.,Section of Internal Medicine, Division of Clinical Sciences, Northern Ontario School of Medicine, Sudbury, ON, Canada
| |
Collapse
|
28
|
Zhao Y, Lyu Y, Zhang Y, Li S, Zhang Y, Liu Y, Tang C, Zhang Z, Li D, Zhang H. The fungal-specific subunit i/j of F1FO-ATP synthase stimulates the pathogenicity of Candida albicans independent of oxidative phosphorylation. Med Mycol 2021; 59:639-652. [PMID: 33269392 DOI: 10.1093/mmy/myaa094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/17/2020] [Accepted: 11/03/2020] [Indexed: 12/21/2022] Open
Abstract
UNLABELLED Invasive fungal infections are a major cause of human mortality due in part to a very limited antifungal drug arsenal. The identification of fungal-specific pathogenic mechanisms is considered a crucial step to current antifungal drug development and represents a significant goal to increase the efficacy and reduce host toxicity. Although the overall architecture of F1FO-ATP synthase is largely conserved in both fungi and mammals, the subunit i/j (Su i/j, Atp18) and subunit k (Su k, Atp19) are proteins not found in mammals and specific to fungi. Here, the role of Su i/j and Su k in Candida albicans was characterized by an in vivo assessment of the virulence and in vitro growth and mitochondrial function. Strikingly, the atp18Δ/Δ mutant showed significantly reduced pathogenicity in systemic murine model. However, this substantial defect in infectivity exists without associated defects in mitochondrial oxidative phosphorylation or proliferation in vitro. Analysis of virulence-related traits reveals normal in both mutants, but shows cell wall defects in composition and architecture in the case of atp18Δ/Δ. We also find that the atp18Δ/Δ mutant is more susceptible to attack by macrophages than wild type, which may correlate well with the abnormal cell wall function and increased sensitivity to oxidative stress. In contrast, no significant changes were observed in any of these studies for the atp19Δ/Δ. These results demonstrate that the fungal-specific Su i/j, but not Su k of F1FO-ATP synthase may play a critical role in C. albicans infectivity and represent another opportunity for new therapeutic target investigation. LAY ABSTRACT This study aims to investigate biological functions of fungal-specific subunit i/j and subunit k of ATP synthase in C. albicans oxidative phosphorylation and virulence potential. Our results revealed that subunit i/j, and not subunit k, is critical for C. albicans pathogenicity.
Collapse
Affiliation(s)
- Yajing Zhao
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Yan Lyu
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Yanli Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Shuixiu Li
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Yishan Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Yuting Liu
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Chuanyan Tang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Zhanpeng Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| | - Dongmei Li
- Department of Microbiology and Immunology, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Hong Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China
- Institute of Mycology, Jinan University, Guangzhou, Guangdong, China
| |
Collapse
|
29
|
The Pathways Underlying the Multiple Roles of p62 in Inflammation and Cancer. Biomedicines 2021; 9:biomedicines9070707. [PMID: 34206503 PMCID: PMC8301319 DOI: 10.3390/biomedicines9070707] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/09/2021] [Accepted: 06/18/2021] [Indexed: 12/12/2022] Open
Abstract
p62 is a highly conserved, multi-domain, and multi-functional adaptor protein critically involved in several important cellular processes. Via its pronounced domain architecture, p62 binds to numerous interaction partners, thereby influencing key pathways that regulate tissue homeostasis, inflammation, and several common diseases including cancer. Via binding of ubiquitin chains, p62 acts in an anti-inflammatory manner as an adaptor for the auto-, xeno-, and mitophagy-dependent degradation of proteins, pathogens, and mitochondria. Furthermore, p62 is a negative regulator of inflammasome complexes. The transcription factor Nrf2 regulates expression of a bundle of ROS detoxifying genes. p62 activates Nrf2 by interaction with and autophagosomal degradation of the Nrf2 inhibitor Keap1. Moreover, p62 activates mTOR, the central kinase of the mTORC1 sensor complex that controls cell proliferation and differentiation. Through different mechanisms, p62 acts as a positive regulator of the transcription factor NF-κB, a central player in inflammation and cancer development. Therefore, p62 represents not only a cargo receptor for autophagy, but also a central signaling hub, linking several important pro- and anti-inflammatory pathways. This review aims to summarize knowledge about the molecular mechanisms underlying the roles of p62 in health and disease. In particular, different types of tumors are characterized by deregulated levels of p62. The elucidation of how p62 contributes to inflammation and cancer progression at the molecular level might promote the development of novel therapeutic strategies.
Collapse
|
30
|
Khodakarimi S, Zarebkohan A, Kahroba H, Omrani M, Sepasi T, Mohaddes G, Beyrampour-Basmenj H, Ebrahimi A, Ebrahimi-Kalan A. The role of miRNAs in the regulation of autophagy in autoimmune diseases. Life Sci 2021; 287:119726. [PMID: 34144058 DOI: 10.1016/j.lfs.2021.119726] [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: 02/15/2021] [Revised: 05/22/2021] [Accepted: 06/05/2021] [Indexed: 10/21/2022]
Abstract
Autoimmune diseases (AD), which are classified as chronic injuries, are caused by a specific auto-reactive reaction. The etiology of most ADs is not well understood. Meanwhile, Autophagy is a protective response defining as a catabolic method by lysosomes tending to maintain homeostasis acts by recycling and discrediting cell compartments. Autophagy plays a crucial role in controlling immune homeostasis by eliminating intracellular pathogens and presenting antigens to immune cognition. MicroRNAs are commonly known as endogenous non-coding small RNAs, which span 18-25 nt and take part in the gene expression at the post-transcriptional level regulation. miRNAs play important roles in different processes like, cell differentiation, duplicating, and apoptosis. Moreover, miRNAs are the critical molecules for the regular function of the immune system by modulating immune tolerance mechanisms and autoimmunity. Recent findings support the role of dysregulated miRNAs in the pathogenesis of ADs and in the regulation of autophagy. In this review, we will focus on the role of the miRNAs in the regulation of autophagy and then will explain the role of dysregulated miRNAs in the initiation of the ADs by modulating autophagy.
Collapse
Affiliation(s)
- Sina Khodakarimi
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Zarebkohan
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of medical sciences, Tabriz, Iran
| | - Houman Kahroba
- Molecular Medicine Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammadhassan Omrani
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tina Sepasi
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of medical sciences, Tabriz, Iran
| | - Gisou Mohaddes
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hanieh Beyrampour-Basmenj
- Department of Medical Biotechnology, School of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ayyub Ebrahimi
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Haliç University, Istanbul, Turkey
| | - Abbas Ebrahimi-Kalan
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| |
Collapse
|
31
|
Romand X, Liu X, Rahman MA, Bhuyan ZA, Douillard C, Kedia RA, Stone N, Roest D, Chew ZH, Cameron AJ, Rehaume LM, Bozon A, Habib M, Armitage CW, Nguyen MVC, Favier B, Beagley K, Maurin M, Gaudin P, Thomas R, Wells TJ, Baillet A. Mediation of Interleukin-23 and Tumor Necrosis Factor-Driven Reactive Arthritis by Chlamydia-Infected Macrophages in SKG Mice. Arthritis Rheumatol 2021; 73:1200-1210. [PMID: 33452873 DOI: 10.1002/art.41653] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 01/07/2021] [Indexed: 12/22/2022]
Abstract
OBJECTIVE ZAP-70W163C BALB/c (SKG) mice develop reactive arthritis (ReA) following infection with Chlamydia muridarum. Since intracellular pathogens enhance their replicative fitness in stressed host cells, we examined how myeloid cells infected with C muridarum drive arthritis. METHODS SKG, Il17a-deficient SKG, and BALB/c female mice were infected with C muridarum or C muridarum luciferase in the genitals. C muridarum dissemination was assessed by in vivo imaging or genomic DNA amplification. Macrophages were depleted using clodronate liposomes. Anti-tumor necrosis factor (anti-TNF) and anti-interleukin-23p19 (anti-IL-23p19) were administered after infection or arthritis onset. Gene expression of Hspa5, Tgtp1, Il23a, Il17a, Il12b, and Tnf was compared in SKG mice and BALB/c mice. RESULTS One week following infection with C muridarum, macrophages and neutrophils were observed to have infiltrated the uteri of mice and were also shown to have carried C muridarum DNA to the spleen. C muridarum load was higher in SKG mice than in BALB/c mice. Macrophage depletion was shown to reduce C muridarum load and prevent development of arthritis. Compared with BALB/c mice, expression of Il23a and Il17a was increased in the uterine and splenic neutrophils of SKG mice. The presence of anti-IL-23p19 during infection or Il17a deficiency suppressed arthritis. Tnf was overexpressed in the joints of SKG mice within 1 week postinfection, and persisted beyond the first week. TNF inhibition during infection or at arthritis onset suppressed the development of arthritis. Levels of endoplasmic reticulum stress were constitutively increased in the joints of SKG mice but were induced, in conjunction with immunity-related GTPase, by C muridarum infection in the uterus. CONCLUSION C muridarum load is higher in SKG mice than in BALB/c mice. Whereas proinflammatory IL-23 produced by neutrophils contributes to the initiation of C muridarum-mediated ReA, macrophage depletion reduces C muridarum dissemination to other tissues, tissue burden, and the development of arthritis. TNF inhibition was also shown to suppress arthritis development. Our data suggest that enhanced bacterial dissemination in macrophages of SKG mice drives the TNF production needed for persistent arthritis.
Collapse
Affiliation(s)
- Xavier Romand
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Xiao Liu
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - M Arifur Rahman
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Zaied Ahmed Bhuyan
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia, and North South University, Dhaka, Bangladesh
| | - Claire Douillard
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Reena Arora Kedia
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Nathan Stone
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Dominique Roest
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Zi Huai Chew
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Amy J Cameron
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Linda M Rehaume
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Aurélie Bozon
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Mohammed Habib
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Charles W Armitage
- Queensland University of Technology, Brisbane, Queensland, Australia, and King's College London, London, UK
| | | | - Bertrand Favier
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Kenneth Beagley
- Queensland University of Technology, Brisbane, Queensland, Australia
| | - Max Maurin
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Philippe Gaudin
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| | - Ranjeny Thomas
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Timothy J Wells
- University of Queensland Diamantina Institute and Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Athan Baillet
- Université Grenoble Alpes, GREPI TIMC-IMAG, UMR 5525, Grenoble, France
| |
Collapse
|
32
|
Meng Z, Xu R, Xie L, Wu Y, He Q, Gao P, He X, Chen Q, Xie Q, Zhang J, Yang Q. A20/Nrdp1 interaction alters the inflammatory signaling profile by mediating K48- and K63-linked polyubiquitination of effectors MyD88 and TBK1. J Biol Chem 2021; 297:100811. [PMID: 34023381 PMCID: PMC8233150 DOI: 10.1016/j.jbc.2021.100811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 05/10/2021] [Accepted: 05/19/2021] [Indexed: 11/16/2022] Open
Abstract
A20 is a potent anti-inflammatory protein that mediates both inflammation and ubiquitination in mammals, but the related mechanisms are not clear. In this study, we performed mass spectrometry (MS) screening, gene ontology (GO) analysis, and coimmunoprecipitation (co-IP) in a lipopolysaccharide (LPS)-induced inflammatory cell model to identify novel A20-interacting proteins. We confirmed that the E3 ubiquitin ligase Nrdp1, also known as ring finger protein 41 (RNF41), interacted with A20 in LPS-stimulated cells. Further co-IP analysis demonstrated that when A20 was knocked out, degradation-inducing K48-linked ubiquitination of inflammatory effector MyD88 was decreased, but protein interaction-mediating K63-linked ubiquitination of another inflammatory effector TBK1 was increased. Moreover, western blot experiments showed that A20 inhibition induced an increase in levels of MyD88 and phosphorylation of downstream effector proteins as well as of TBK1 and a downstream effector, while Nrdp1 inhibition induced an increase in MyD88 but a decrease in TBK1 levels. When A20 and Nrdp1 were coinhibited, no further change in MyD88 was observed, but TBK1 levels were significantly decreased compared with those upon A20 inhibition alone. Gain- and loss-of-function analyses revealed that the ZnF4 domain of A20 is required for Nrdp1 polyubiquitination. Upon LPS stimulation, the inhibition of Nrdp1 alone increased the secretion of IL-6 and TNF-α but decreased IFN-β secretion, as observed in other studies, suggesting that Nrdp1 preferentially promotes the production of IFN-β. Taken together, these results demonstrated that A20/Nrdp1 interaction is important for A20 anti-inflammation, thus revealing a novel mechanism for the anti-inflammatory effects of A20.
Collapse
Affiliation(s)
- Zhaoyou Meng
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China; Department of Neurobiology, Army Medical University (Third Military Medical University), Chongqing, China
| | - Rui Xu
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Lexing Xie
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yutong Wu
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qian He
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Pan Gao
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiaohui He
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qiong Chen
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qi Xie
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
| | - Jiqiang Zhang
- Department of Neurobiology, Army Medical University (Third Military Medical University), Chongqing, China.
| | - Qingwu Yang
- Department of Neurology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
| |
Collapse
|
33
|
Teo YJ, Ng SL, Mak KW, Setiagani YA, Chen Q, Nair SK, Sheng J, Ruedl C. Renal CD169 ++ resident macrophages are crucial for protection against acute systemic candidiasis. Life Sci Alliance 2021; 4:e202000890. [PMID: 33608410 PMCID: PMC7918719 DOI: 10.26508/lsa.202000890] [Citation(s) in RCA: 4] [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: 08/05/2020] [Revised: 01/07/2021] [Accepted: 01/22/2021] [Indexed: 12/17/2022] Open
Abstract
Disseminated candidiasis remains as the most common hospital-acquired bloodstream fungal infection with up to 40% mortality rate despite the advancement of medical and hygienic practices. While it is well established that this infection heavily relies on the innate immune response for host survival, much less is known for the protective role elicited by the tissue-resident macrophage (TRM) subsets in the kidney, the prime organ for Candida persistence. Here, we describe a unique CD169++ TRM subset that controls Candida growth and inflammation during acute systemic candidiasis. Their absence causes severe fungal-mediated renal pathology. CD169++ TRMs, without being actively involved in direct fungal clearance, increase host resistance by promoting IFN-γ release and neutrophil ROS activity.
Collapse
Affiliation(s)
- Yi Juan Teo
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - See Liang Ng
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Keng Wai Mak
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Qi Chen
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Sajith Kumar Nair
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Jianpeng Sheng
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Christiane Ruedl
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| |
Collapse
|
34
|
Abstract
Inflammation is triggered by stimulation of innate sensors that recognize pathogens, chemical and physical irritants, and damaged cells subsequently initiating a well-orchestrated adaptive immune response. Immune cell activation is a strictly regulated and self-resolving process supported by an array of negative feedback mechanisms to sustain tissue homeostasis. The disruption of these regulatory pathways forms the basis of chronic inflammatory diseases, including periodontitis. Ubiquitination, a covalent posttranslational modification of target proteins with ubiquitin, has a profound effect on the stability and activity of its substrates, thereby regulating the immune system at molecular and cellular levels. Through the cooperative actions of E3 ubiquitin ligases and deubiquitinases, ubiquitin modifications are implicated in several biological processes, including proteasomal degradation, transcriptional regulation, regulation of protein-protein interactions, endocytosis, autophagy, DNA repair, and cell cycle regulation. A20 (tumor necrosis factor α-induced protein 3 or TNFAIP3) is a ubiquitin-editing enzyme that mainly functions as an endogenous regulator of inflammation through termination of nuclear factor (NF)-κB activation as part of a negative feedback loop. A20 interacts with substrates that reside downstream of immune sensors, including Toll-like receptors, nucleotide-binding oligomerization domain-containing receptors, lymphocyte receptors, and cytokine receptors. Due to its pleiotropic functions as a ubiquitin binding protein, deubiquitinase and ubiquitin ligase, and its versatile role in various signaling pathways, aberrant A20 levels are associated with numerous conditions such as rheumatoid arthritis, diabetes, systemic lupus erythematosus, inflammatory bowel disease, psoriasis, Sjögren syndrome, coronary artery disease, multiple sclerosis, cystic fibrosis, asthma, cancer, neurological disorders, and aging-related sequelae. Similarly, A20 has recently been implicated as an essential regulator of inflammation in the oral cavity. This review presents information on the ubiquitin system and regulation of NF-κB by ubiquitination using A20 as a representative molecule and highlights how the dysregulation of this system can lead to several immune pathologies, including oral cavity-related disorders mainly focusing on periodontitis.
Collapse
Affiliation(s)
- E.C. Mooney
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Philips Institute for Oral Health Research, Virginia Commonwealth University, School of Dentistry, Richmond, VA, USA
| | - S.E. Sahingur
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
35
|
Mousavi MJ, Mahmoudi M, Ghotloo S. Escape from X chromosome inactivation and female bias of autoimmune diseases. Mol Med 2020; 26:127. [PMID: 33297945 PMCID: PMC7727198 DOI: 10.1186/s10020-020-00256-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 12/02/2020] [Indexed: 12/13/2022] Open
Abstract
Generally, autoimmune diseases are more prevalent in females than males. Various predisposing factors, including female sex hormones, X chromosome genes, and the microbiome have been implicated in the female bias of autoimmune diseases. During embryogenesis, one of the X chromosomes in the females is transcriptionally inactivated, in a process called X chromosome inactivation (XCI). This equalizes the impact of two X chromosomes in the females. However, some genes escape from XCI, providing a basis for the dual expression dosage of the given gene in the females. In the present review, the contribution of the escape genes to the female bias of autoimmune diseases will be discussed.
Collapse
Affiliation(s)
- Mohammad Javad Mousavi
- Department of Hematology, Faculty of Allied Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Somayeh Ghotloo
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| |
Collapse
|
36
|
Austermeier S, Kasper L, Westman J, Gresnigt MS. I want to break free – macrophage strategies to recognize and kill Candida albicans, and fungal counter-strategies to escape. Curr Opin Microbiol 2020; 58:15-23. [DOI: 10.1016/j.mib.2020.05.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/11/2020] [Accepted: 05/18/2020] [Indexed: 12/31/2022]
|
37
|
Razani B, Malynn BA, Ma A. Preserving immune homeostasis with A20. Adv Immunol 2020; 148:1-48. [PMID: 33190732 DOI: 10.1016/bs.ai.2020.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A20/TNFAIP3 is a TNF induced gene that plays a profound role in preserving cellular and organismal homeostasis (Lee, et al., 2000; Opipari etal., 1990). This protein has been linked to multiple human diseases via genetic, epigenetic, and an emerging series of patients with mono-allelic coding mutations. Diverse cellular functions of this pleiotropically expressed protein include immune-suppressive, anti-inflammatory, and cell protective functions. The A20 protein regulates ubiquitin dependent cell signals; however, the biochemical mechanisms by which it performs these functions is surprisingly complex. Deciphering these cellular and biochemical facets of A20 dependent biology should greatly improve our understanding of murine and human disease pathophysiology as well as unveil new mechanisms of cell and tissue biology.
Collapse
Affiliation(s)
- Bahram Razani
- Department of Dermatology, University of California, San Francisco, CA, United States
| | - Barbara A Malynn
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States.
| |
Collapse
|
38
|
Liang J, Zhang JJ, Huang HI, Kanayama M, Youssef N, Jin YJ, Reyes EY, Abram CL, Yang S, Lowell CA, Wang D, Shao L, Shinohara ML, Zhang JY, Hammer GE. The Ubiquitin-Modifying Enzyme A20 Terminates C-Type Lectin Receptor Signals and Is a Suppressor of Host Defense against Systemic Fungal Infection. Infect Immun 2020; 88:e00048-20. [PMID: 32540868 PMCID: PMC7440764 DOI: 10.1128/iai.00048-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 06/01/2020] [Indexed: 01/02/2023] Open
Abstract
C-type lectin receptors (CLRs) play key roles in antifungal defense. CLR-induced NF-κB is central to CLR functions in immunity, and thus, molecules that control the amplitude of CLR-induced NF-κB could profoundly influence host defense against fungal pathogens. However, little is known about the mechanisms that negatively regulate CLR-induced NF-κB, and molecules which act on the CLR family broadly and which directly regulate acute CLR-signaling cascades remain unidentified. Here, we identify the ubiquitin-editing enzyme A20 as a negative regulator of acute NF-κB activation downstream of multiple CLR pathways. Absence of A20 suppression results in exaggerated CLR responses in cells which are A20 deficient and also cells which are A20 haplosufficient, including multiple primary immune cells. Loss of a single allele of A20 results in enhanced defense against systemic Candida albicans infection and prolonged host survival. Thus, A20 restricts CLR-induced innate immune responses in vivo and is a suppressor of host defense against systemic fungal infection.
Collapse
Affiliation(s)
- Jie Liang
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Junyi J Zhang
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Hsin-I Huang
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Masashi Kanayama
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Nourhan Youssef
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Yingai J Jin
- Department of Dermatology, Duke University Medical Center, Durham, North Carolina, USA
| | - Estefany Y Reyes
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Clare L Abram
- Department of Laboratory Medicine and Immunology Program, University of California, San Francisco, California, USA
| | - Shigao Yang
- Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Clifford A Lowell
- Department of Laboratory Medicine and Immunology Program, University of California, San Francisco, California, USA
| | - Donghai Wang
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Ling Shao
- Department of Medicine, University of Southern California, Los Angeles, California, USA
| | - Mari L Shinohara
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Jennifer Y Zhang
- Department of Dermatology, Duke University Medical Center, Durham, North Carolina, USA
| | - Gianna Elena Hammer
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| |
Collapse
|
39
|
Dai J, Chen Y, Jiang F. Allicin reduces inflammation by regulating ROS/NLRP3 and autophagy in the context of A. fumigatus infection in mice. Gene 2020; 762:145042. [PMID: 32777529 DOI: 10.1016/j.gene.2020.145042] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/26/2020] [Accepted: 08/05/2020] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Inhibitory effect of allicin with broad-spectrum antimicrobial activity on A. fumigatus and the regulation mechanism of inflammation and autophagy in vitro and in vivo. METHODS The corresponding concentration of allicin was prepared according to the needs of the experiment. In vitro, 2 ml 5 × 104 of fungal spores suspension was added to the 6-well plate per hole, and different final concentrations of allicin (1 μl/ml, 2.5 μl/ml, 5 μl/ml, 10 μl/ml, 20 μl/ml, 30 μl/ml) were added. The fungal spores were stained by fluorescent dye SYTO 9 (green) every day, and the spore germination inhibition was detected by flow cytometry in different PH. RAW264.7 cells were cultured and stimulated by A. fumigatus spores for 3 h, then allicin solution was added. Then some cells were stained with ROS probe (green) and hochest33342 (blue). The effect of allicin on ROS was observed by fluorescence microscope. The other part of cells extracted protein from cell lysate and detected the effect of allicin on inflammatory factors and autophagy by Western-blotting. The green and red spots of RAW264.7 cells stably transfected with GFP-RFP-LC3 were observed by fluorescence microscopy. In vivo, A. fumigatus spore was injected intratracheally into mice, then allicin was injected intravenously at a concentration of 5 mg/kg/day for 7 consecutive days. The survival status, pulmonary fungal load and weight of mice was recorded continuously for 30 days and detected the changes of lung by pathological examination and immunohistochemistry. RESULTS In vitro, allicin significantly inhibited the spore germination of A. fumigatus within 24 h in a dose-dependent manner and it had a stable inhibition on the spore germination of A. fumigatus in acidic environment. Cell experiments showed that allicin inhibited intracellular spore germination by inhibiting ROS production, inflammation and autophagy. In the animal experiment, the survival rate and body weight of allicin injection group were higher than that of non injection group, while the spore load of lung was lower than that of non injection group (P < 0.05). CONCLUSIONS These results support that allicin reduces inflammation and autophagy resistance to A. fumigatus infection, It also provides a possible treatment for Aspergillus infectious diseases, i.e. early anti-inflammation, antibiotics or drugs that inhibit excessive autophagy.
Collapse
Affiliation(s)
- Jingjing Dai
- Department of Medical Laboratory, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, China
| | - Ying Chen
- Department of Medical Laboratory, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, China.
| | - Feng Jiang
- Department of Stomatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, China.
| |
Collapse
|
40
|
Xu-Vanpala S, Deerhake ME, Wheaton JD, Parker ME, Juvvadi PR, MacIver N, Ciofani M, Shinohara ML. Functional heterogeneity of alveolar macrophage population based on expression of CXCL2. Sci Immunol 2020; 5:eaba7350. [PMID: 32769172 PMCID: PMC7717592 DOI: 10.1126/sciimmunol.aba7350] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022]
Abstract
Alveolar macrophages (AMs) are the major lung-resident macrophages and have contradictory functions. AMs maintain tolerance and tissue homeostasis, but they also initiate strong inflammatory responses. However, such opposing roles within the AM population were not known to be simultaneously generated and coexist. Here, we uncovered heterogeneous AM subpopulations generated in response to two distinct pulmonary fungal infections, Cryptococcus neoformans and Aspergillus fumigatus Some AMs are bona fide sentinel cells that produce chemoattractant CXCL2, which also serves as a marker for AM heterogeneity, in the context of pulmonary fungal infections. However, other AMs do not produce CXCL2 and other pro-inflammatory molecules. Instead, they highly produce anti-inflammatory molecules, including interleukin-10 (IL-10) and complement component 1q (C1q). These two AM subpopulations have distinct metabolic profiles and phagocytic capacities. We report that polarization of pro-inflammatory and anti-inflammatory AM subpopulations is regulated at both epigenetic and transcriptional levels and that these AM subpopulations are generally highly plastic. Our studies have uncovered the role of C1q expression in programming and sustaining anti-inflammatory AMs. Our finding of the AM heterogeneity upon fungal infections suggests a possible pharmacological intervention target to treat fungal infections by tipping the balance of AM subpopulations.
Collapse
Affiliation(s)
- Shengjie Xu-Vanpala
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - M Elizabeth Deerhake
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Joshua D Wheaton
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
- Amgen Research, Amgen Inc., South San Francisco, CA 94080, USA
| | - Morgan E Parker
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Praveen R Juvvadi
- Department of Pediatrics, Duke University Medical Center, Durham, NC 27710, USA
| | - Nancie MacIver
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
- Department of Pediatrics, Duke University Medical Center, Durham, NC 27710, USA
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Maria Ciofani
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Mari L Shinohara
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA.
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| |
Collapse
|
41
|
Ma Y, Zhu S, Lv T, Gu X, Feng H, Zhen J, Xin W, Wan Q. SQSTM1/p62 Controls mtDNA Expression and Participates in Mitochondrial Energetic Adaption via MRPL12. iScience 2020; 23:101428. [PMID: 32805647 PMCID: PMC7452302 DOI: 10.1016/j.isci.2020.101428] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/19/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial DNA (mtDNA) encodes thirteen core components of OXPHOS complexes, and its steady expression is crucial for cellular energy homeostasis. However, the regulation of mtDNA expression machinery, along with its sensing mechanism to energetic stresses, is not fully understood. Here, we identified SQSTM1/p62 as an important regulator of mtDNA expression machinery, which could effectively induce mtDNA expression and the effects were mediated by p38-dependent upregulation of mitochondrial ribosomal protein L12 (MRPL12) in renal tubular epithelial cells (TECs), a highly energy-demanding cell type related to OXPHOS. We further identified a direct binding site within the MRPL12 promoter to ATF2, the downstream effector of p38. Besides, SQSTM1/p62-induced mtDNA expression is involved in both serum deprivation and hypoxia-induced mitochondrial response, which was further highlighted by kidney injury phenotype of TECs-specific SQSTM1/p62 knockout mice. Collectively, these data suggest that SQSTM1/p62 is a key regulator and energetic sensor of mtDNA expression machinery. SQSTM1/p62 is an important regulator of mtDNA expression machinery SQSTM1/p62 induces MRPL12 expression via activating p38/ATF2 signaling pathway SQSTM1/p62 maintains TECs mitochondrial homeostasis and kidney function
Collapse
Affiliation(s)
- Yuan Ma
- Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing 100034, China
| | - Suwei Zhu
- School of Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Tingting Lv
- School of Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Xia Gu
- School of Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Hong Feng
- Cancer Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250012, China
| | - Junhui Zhen
- Department of Pathology, School of Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Wei Xin
- Department of Central Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; Department of Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250012, China.
| | - Qiang Wan
- Department of Endocrinology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China.
| |
Collapse
|
42
|
König A, Hube B, Kasper L. The Dual Function of the Fungal Toxin Candidalysin during Candida albicans-Macrophage Interaction and Virulence. Toxins (Basel) 2020; 12:toxins12080469. [PMID: 32722029 PMCID: PMC7471981 DOI: 10.3390/toxins12080469] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/16/2020] [Accepted: 07/19/2020] [Indexed: 12/12/2022] Open
Abstract
The dimorphic fungus Candida albicans is both a harmless commensal organism on mucosal surfaces and an opportunistic pathogen. Under certain predisposing conditions, the fungus can overgrow the mucosal microbiome and cause both superficial and life-threatening systemic infections after gaining access to the bloodstream. As the first line of defense of the innate immune response, infecting C. albicans cells face macrophages, which mediate the clearance of invading fungi by intracellular killing. However, the fungus has evolved sophisticated strategies to counteract macrophage antimicrobial activities and thus evade immune surveillance. The cytolytic peptide toxin, candidalysin, contributes to this fungal defense machinery by damaging immune cell membranes, providing an escape route from the hostile phagosome environment. Nevertheless, candidalysin also induces NLRP3 inflammasome activation, leading to an increased host-protective pro-inflammatory response in mononuclear phagocytes. Therefore, candidalysin facilitates immune evasion by acting as a classical virulence factor but also contributes to an antifungal immune response, serving as an avirulence factor. In this review, we discuss the role of candidalysin during C. albicans infections, focusing on its implications during C. albicans-macrophage interactions.
Collapse
Affiliation(s)
- Annika König
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology–Hans Knoell Institute, 07745 Jena, Germany;
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology–Hans Knoell Institute, 07745 Jena, Germany;
- Center for Sepsis Control and Care, University Hospital Jena, 07747 Jena, Germany
- Institute of Microbiology, Friedrich Schiller University, 07743 Jena, Germany
- Correspondence: (B.H.); (L.K.)
| | - Lydia Kasper
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology–Hans Knoell Institute, 07745 Jena, Germany;
- Correspondence: (B.H.); (L.K.)
| |
Collapse
|
43
|
LC3-associated phagocytosis - The highway to hell for phagocytosed microbes. Semin Cell Dev Biol 2020; 101:68-76. [DOI: 10.1016/j.semcdb.2019.04.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/18/2019] [Accepted: 04/23/2019] [Indexed: 12/13/2022]
|
44
|
Li C, Li C, Lin J, Zhao G, Xu Q, Jiang N, Wang Q, Peng X, Zhu G, Jiang J. The Role of Autophagy in the Innate Immune Response to Fungal Keratitis Caused by Aspergillus fumigatus Infection. Invest Ophthalmol Vis Sci 2020; 61:25. [PMID: 32084267 PMCID: PMC7326573 DOI: 10.1167/iovs.61.2.25] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Purpose To determine the role of autophagy in the innate immune response to fungal keratitis (FK) caused by Aspergillus fumigatus infection. Methods Corneal samples obtained from patients and mice with FK were visualized via transmission electron microscopy (TEM). Autophagy-related proteins LC3B-II, Beclin-1, LAMP-1, and p62 in A. fumigatus-infected corneas of C57BL/6 mice were tested by Western blot. After treatment with autophagy inhibitors 3-methyladenine (3-MA), chloroquine (CQ), or inducer rapamycin, autophagy-related proteins were detected by Western blot. Corneas were photographed with slit lamp microscopy and pathological changes were observed by hematoxylin and eosin staining. Polymorphonuclear neutrophilic leukocytes (PMNs) were assessed by immunofluorescent staining and observed under TEM. The levels of CXCL-1, IL-1β, HMGB1, IL-18, TNF-α, and IL-10 were tested by reverse transcription polymerase chain reaction and Western blot. The quantification of fungal loads was detected and photographed. Results The accumulation of autophagosomes in corneas of patients and mice with FK was observed with TEM. The expression of LC3B-II, Beclin-1, and LAMP-1 was elevated in corneas after fungal infection, whereas p62 was reduced. Treatment with 3-MA or CQ upregulated clinical scores, pathological changes, and the expression of CXCL-1, IL-1β, HMGB1, IL-18, and TNF-α except IL-10. The morphology of PMNs was changed and PMN recruitment was increased in mice corneas treated with 3-MA or CQ, whereas rapamycin reduced the inflammatory response to keratitis. These results were statistically significant. Conclusions A. fumigatus infection increases the expression of autophagy in corneas. Autophagy plays an anti-inflammatory role in the innate immune response to A. fumigatus keratitis.
Collapse
|
45
|
Varisli L, Cen O, Vlahopoulos S. Dissecting pharmacological effects of chloroquine in cancer treatment: interference with inflammatory signaling pathways. Immunology 2020; 159:257-278. [PMID: 31782148 PMCID: PMC7011648 DOI: 10.1111/imm.13160] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
Chloroquines are 4-aminoquinoline-based drugs mainly used to treat malaria. At pharmacological concentrations, they have significant effects on tissue homeostasis, targeting diverse signaling pathways in mammalian cells. A key target pathway is autophagy, which regulates macromolecule turnover in the cell. In addition to affecting cellular metabolism and bioenergetic flow equilibrium, autophagy plays a pivotal role at the interface between inflammation and cancer progression. Chloroquines consequently have critical effects in tissue metabolic activity and importantly, in key functions of the immune system. In this article, we will review the work addressing the role of chloroquines in the homeostasis of mammalian tissue, and the potential strengths and weaknesses concerning their use in cancer therapy.
Collapse
Affiliation(s)
- Lokman Varisli
- Union of Education and Science Workers (EGITIM SEN), Diyarbakir Branch, Diyarbakir, Turkey
- Department of Molecular Biology and Genetics, Science Faculty, Dicle University, Diyarbakir, Turkey
| | - Osman Cen
- Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Department of Natural Sciences, Joliet Jr College, Joliet, IL, USA
| | - Spiros Vlahopoulos
- First Department of Pediatrics, National and Kapodistrian University of Athens, Athens, Greece
| |
Collapse
|
46
|
Wang Z, Zhou H, Zheng H, Zhou X, Shen G, Teng X, Liu X, Zhang J, Wei X, Hu Z, Zeng F, Hu Y, Hu J, Wang X, Chen S, Cheng J, Zhang C, Gui Y, Zou S, Hao Y, Zhao Q, Wu W, Zhou Y, Cui K, Huang N, Wei Y, Li W, Li J. Autophagy-based unconventional secretion of HMGB1 by keratinocytes plays a pivotal role in psoriatic skin inflammation. Autophagy 2020; 17:529-552. [PMID: 32019420 DOI: 10.1080/15548627.2020.1725381] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The precise mechanism through which macroautophagy/autophagy affects psoriasis is poorly understood. Here, we found that keratinocyte (KC) autophagy, which was positively correlated with psoriatic severity in patients and mouse models and could be inhibited by mitogen-activated protein kinase (MAPK) family inactivation. The impairment of autophagic flux alleviated psoriasisform inflammation. We also found that an autophagy-based unconventional secretory pathway (autosecretion) dependent on ATG5 (autophagy related 5) and GORASP2 (golgi reassembly stacking protein 2) promoted psoriasiform KC inflammation. Moreover, the alarmin HMGB1 (high mobility group box 1) was more effective than other autosecretory proteins in regulating psoriasiform cutaneous inflammation. HMGB1 neutralization in autophagy-efficient KCs eliminated the differences in psoriasiform inflammation between Krt14+/+-Atg5f/f KCs and Krt14Cre/+-atg5f/f KCs, and conversely, recombinant HMGB1 almost completely restored psoriasiform inflammation in Krt14Cre/+-atg5f/f KCs in vivo. These results suggest that HMGB1-associated autosecretion plays a pivotal role in cutaneous inflammation. Finally, we demonstrated that Krt14Cre/+-hmgb1f/f mice displayed attenuated psoriatic inflammation due to the essential crosstalk between KC-specific HMGB1-associated autosecretion and γδT cells. Thus, this study uncovered a novel autophagy mechanism in psoriasis pathogenesis, and the findings imply the clinical significance of investigating and treating psoriasis.Abbreviations: 3-MA: 3-methyladenine; ACTB: actin beta; AGER: advanced glycosylation end-product specific receptor; Anti-HMGB1: anti-HMGB1 neutralizing antibody; Anti-IL18: anti-IL18 neutralizing antibody; Anti-IL1B: anti-IL1B neutralizing antibody; ATG5: autophagy related 5; BAF: bafilomycin A1; BECN1: beclin 1; CASP1: caspase 1; CCL: C-C motif chemokine ligand; CsA: cyclosporine A; ctrl shRNA: lentivirus harboring shRNA against control; CXCL: C-X-C motif chemokine ligand; DCs: dendritic cells; DMEM: dulbecco's modified Eagle's medium; ELISA: enzyme-linked immunosorbent assay; EM: electron microscopy; FBS: fetal bovine serum; GORASP2 shRNA: lentivirus harboring shRNA against GORASP2; GORASP2/GRASP55: golgi reassembly stacking protein 2; GR1: a composite epitope between LY6 (lymphocyte antigen 6 complex) locus C1 and LY6 locus G6D antigens; H&E: hematoxylin and eosin; HMGB1: high mobility group box 1; HMGB1 shRNA: lentivirus harboring shRNA against HMGB1; IFNG/IFN-γ: interferon gamma; IL17A: interleukin 17A; IL18: interleukin 18; IL1A/IL-1α: interleukin 1 alpha; IL1B/IL-1β: interleukin 1 beta; IL22/IL-22: interleukin 22; IL23A: interleukin 23 subunit alpha; IL23R: interleukin 23 receptor; IMQ: imiquimod; ITGAM/CD11B: integrin subunit alpha M; ITGAX/CD11C: integrin subunit alpha X; IVL: involucrin; KC: keratinocyte; KD: knockdown; KO: knockout; Krt14+/+-Atg5f/f mice: mice bearing an Atg5 flox allele, in which exon 3 of the Atg5 gene is flanked by two loxP sites; Krt14+/+-Hmgb1f/f: mice bearing an Hmgb1 flox allele, in which exon 2 to 4 of the Hmgb1 gene is flanked by two loxP sites; Krt14Cre/+-atg5f/f mice: keratinocyte-specific atg5 knockout mice generated by mating Atg5-floxed mice with mice expressing Cre recombinase under the control of the promoter of Krt4; Krt14Cre/+-hmgb1f/f mice: keratinocyte-specific hmgb1 knockout mice generated by mating Hmgb1-floxed mice with mice expressing Cre recombinase under the control of the promoter of Krt14; Krt14-Vegfa mice: mice expressing 164-amino acid Vegfa splice variant recombinase under the control of promoter of Krt14; LAMP1: lysosomal associated membrane protein 1; LDH: lactate dehydrogenase; LORICRIN: loricrin cornified envelope precursor protein; M5: TNF, IL1A, IL17A, IL22 and OSM in combination; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MAPK: mitogen-activated protein kinase; MKI67: marker of proliferation Ki-67; MTT: thiazolyl blue tetrazolium bromide; NFKB/NF-κB: nuclear factor kappa B; NHEKs: primary normal human epidermal keratinocytes; NS: not significant; OSM: oncostatin M; PASI: psoriasis area and severity index; PtdIns3K: class III phosphatidylinositol 3-kinase; qRT-PCR: quantitative RT-PCR; RELA/p65: RELA proto-oncogene, NF-kB subunit; rHMGB1: recombinant HMGB1; rIL18: recombinant interleukin 18; rIL1B: recombinant interleukin 1 beta; S100A: S100 calcium binding protein A; SQSTM1/p62: sequestosome 1; T17: IL17A-producing T; TCR: T-cell receptor; tcrd KO mice: tcrd (T cell receptor delta chain) knockout mice, which show deficient receptor expression in all adult lymphoid and epithelial organs; TLR: toll-like receptor; TNF/TNF-α: tumor necrosis factor; WOR: wortmannin; WT: wild-type; γδT17 cells: IL17A-producing γδ T cells.
Collapse
Affiliation(s)
- Zhen Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Hong Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Huaping Zheng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Xikun Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Guobo Shen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Xiu Teng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Xiao Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Jun Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Xiaoqiong Wei
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Zhonglan Hu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Fanlian Zeng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Yawen Hu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Jing Hu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Xiaoyan Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Shuwen Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Juan Cheng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Chen Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Yiyue Gui
- Department of Cardiovascular Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Song Zou
- Department of Cardiovascular Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yan Hao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Qixiang Zhao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Wenling Wu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Yifan Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Kaijun Cui
- Department of Cardiovascular Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Nongyu Huang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Yuquan Wei
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Wei Li
- Department of Dermatovenereology, West China Hospital, Sichuan University, Chengdu, China
| | - Jiong Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, China
| |
Collapse
|
47
|
Yan K, Wu C, Ye Y, Li L, Wang X, He W, Ren S, Xu Y. A20 inhibits osteoclastogenesis via TRAF6-dependent autophagy in human periodontal ligament cells under hypoxia. Cell Prolif 2020; 53:e12778. [PMID: 32027437 PMCID: PMC7106956 DOI: 10.1111/cpr.12778] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/12/2020] [Accepted: 01/19/2020] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES A20 exerts an anti-osteoclastogenic effect through the inhibition of NF-κB signalling in periodontitis. It also regulates autophagy via ubiquitin modification. This study was aimed at exploring the relationship between A20 and autophagy in anti-osteoclastogenesis in human periodontal ligament cells (hPDLCs) under hypoxia. MATERIALS AND METHODS Real-time PCR and Western blot were used to detect relative mRNA and protein levels. The formation of autophagosomes was measured by TEM. Osteoclastic differentiation was assessed by TRAP staining and hydroxyapatite resorption assay. The interactions between different proteins were observed by co-IP. RESULTS Cells cultured under 2% O₂ exhibited decreased A20 expression and increased RANKL/OPG (R/O) ratio. There was a negative correlation between A20 and TRAF6, and similar results were found with autophagic flux. A20 delayed the increase in R/O ratio under hypoxia. Autophagy in hPDLCs and osteoclast differentiation and hydroxyapatite resorption areas in mouse bone marrow mononuclear cells (BMMCs) were inhibited by A20. Moreover, inhibition of autophagy using 3-MA resulted in increased expression of A20 and decreased number and function of osteoclasts. In addition, A20 inhibited polyubiquitination at K63 and enhanced that at K48 in TRAF6 to suppress autophagy under hypoxic conditions. CONCLUSIONS A20 inhibits osteoclastogenesis via inhibition of TRAF6-dependent autophagy in hPDLCs under hypoxia. These findings suggest that A20 may be a key gene target during bone loss in periodontitis via TRAF6-mediated inhibition of autophagy.
Collapse
Affiliation(s)
- Ke Yan
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Chengyu Wu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Yu Ye
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Lu Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Xiaoqian Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Wei He
- Department of Neurosurgery, Affiliated Aoyang Hospital of Jiangsu University, Zhangjiagang, China
| | - Shuangshuang Ren
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yan Xu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| |
Collapse
|
48
|
Yu Y, Sun B. Autophagy-mediated regulation of neutrophils and clinical applications. BURNS & TRAUMA 2020; 8:tkz001. [PMID: 32341923 PMCID: PMC7175771 DOI: 10.1093/burnst/tkz001] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/07/2019] [Indexed: 12/16/2022]
Abstract
Autophagy, an adaptive catabolic process, plays a cytoprotective role in enabling cellular homeostasis in the innate and adaptive immune systems. Neutrophils, the most abundant immune cells in circulation, are professional killers that orchestrate a series of events during acute inflammation. The recent literature indicates that autophagy has important roles in regulating neutrophil functions, including differentiation, degranulation, metabolism and neutrophil extracellular trap formation, that dictate neutrophil fate. It is also becoming increasingly clear that autophagy regulation is critical for neutrophils to exert their immunological activity. However, evidence regarding the systematic communication between neutrophils and autophagy is insufficient. Here, we provide an updated overview of the function of autophagy as a regulator of neutrophils and discuss its clinical relevance to provide novel insight into potentially relevant treatment strategies.
Collapse
Affiliation(s)
- Yao Yu
- Department of Burns and Plastic Surgery, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou 215002, Jiangsu Province, China
| | - Bingwei Sun
- Department of Burns and Plastic Surgery, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou 215002, Jiangsu Province, China
| |
Collapse
|
49
|
Xia B, Yu J, He T, Liu X, Su J, Wang M, Wang J, Zhu Y. Lactobacillus johnsonii L531 ameliorates enteritis via elimination of damaged mitochondria and suppression of SQSTM1-dependent mitophagy in a Salmonella infantis model of piglet diarrhea. FASEB J 2019; 34:2821-2839. [PMID: 31908018 DOI: 10.1096/fj.201901445rrr] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 12/10/2019] [Accepted: 12/10/2019] [Indexed: 01/04/2023]
Abstract
Newly weaned piglets challenged with Salmonella infantis were particularly susceptible, whereas oral preadministration of Lactobacillus johnsonii L531 alleviated enteritis and promoted intestinal secretory IgA production. Salmonella infantis-induced activation of NLRC4 and NLRP3 inflammasomes and (nuclear factor kappa B) NF-κB signaling in the small intestine was also inhibited by L. johnsonii L531 pretreatment, thus limiting inflammation. An IPEC-J2 cell model of S. infantis infection yielded similar results. Salmonella infantis infection also resulted in mitochondrial damage and impaired mitophagy in the ileum and IPEC-J2 cells, as demonstrated by immunofluorescence colocalization of mitochondria with microtubule-binding protein light chain 3 (LC3) and high expression of autophagy-related proteins PTEN-induced putative kinase 1 (PINK1), sequestosome 1 (SQSTM1/p62), optineurin (OPTN), and LC3 by Western blotting analysis. However, L. johnsonii L531 pretreatment reduced both the extent of mitochondrial damage and autophagy-related protein expression. Our findings suggest that the amelioration of S. infantis-associated enteritis by L. johnsonii L531 is associated with regulation of NLRC4 and NLRP3 inflammasomes and NF-κB signaling pathway activation and suppression of mitochondrial damage. Amelioration of impaired mitophagy by L. johnsonii L531 could involve eliminating damaged mitochondria and regulating S. infantis-induced activation of the NF-κB-SQSTM1mitophagy signaling pathway in host cells to prevent the further mitochondrial damage and S. infantis dissemination.
Collapse
Affiliation(s)
- Bing Xia
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jiao Yu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Ting He
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiao Liu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jinhui Su
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Meijun Wang
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jiufeng Wang
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yaohong Zhu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| |
Collapse
|
50
|
Abstract
Aspergillus fumigatus is a saprotrophic fungus; its primary habitat is the soil. In its ecological niche, the fungus has learned how to adapt and proliferate in hostile environments. This capacity has helped the fungus to resist and survive against human host defenses and, further, to be responsible for one of the most devastating lung infections in terms of morbidity and mortality. In this review, we will provide (i) a description of the biological cycle of A. fumigatus; (ii) a historical perspective of the spectrum of aspergillus disease and the current epidemiological status of these infections; (iii) an analysis of the modes of immune response against Aspergillus in immunocompetent and immunocompromised patients; (iv) an understanding of the pathways responsible for fungal virulence and their host molecular targets, with a specific focus on the cell wall; (v) the current status of the diagnosis of different clinical syndromes; and (vi) an overview of the available antifungal armamentarium and the therapeutic strategies in the clinical context. In addition, the emergence of new concepts, such as nutritional immunity and the integration and rewiring of multiple fungal metabolic activities occurring during lung invasion, has helped us to redefine the opportunistic pathogenesis of A. fumigatus.
Collapse
Affiliation(s)
- Jean-Paul Latgé
- School of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Georgios Chamilos
- School of Medicine, University of Crete, Heraklion, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion, Crete, Greece
| |
Collapse
|