1
|
Li D, Hodges R, AukrustNaqvi M, Bair J, Bispo PJM, Gilmore MS, Gregory-Ksander M, Dartt DA. Staphylococcus aureus activates NRLP3-dependent IL-1β secretion from human conjunctival goblet cells using α toxin and toll-like receptors 2 and 1. Front Cell Infect Microbiol 2023; 13:1265471. [PMID: 38089811 PMCID: PMC10711068 DOI: 10.3389/fcimb.2023.1265471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/30/2023] [Indexed: 12/18/2023] Open
Abstract
We used cultured human conjunctival goblet cells to determine (i) whether the toxigenic S. aureus- induced activation of the epithelial goblet cells requires two signals to activate the NLRP3 inflammasome, (ii) if one signal is mediated by TLR1, TLR2, or TLR6, and (iii) if the S. aureus toxin α toxin is another signal for the activation of the inflammasome and secretion of mature IL-1β. Cultured cells were incubated with siRNA to knock down the different TLRs. After stimulation with toxigenic S. aureus RN6390, pro-IL-1β synthesis, caspase-1 activity, and mature IL-1β secretion were measured. In a separate set of experiments, the cells were incubated with toxigenic S. aureus RN6390 or mutant S. aureus ALC837 that does not express α toxin with or without exogenous α toxin. A gentamicin protection assay was used to determine if intracellular bacteria were active. We conclude that α toxin from toxigenic S. aureus triggers two separate mechanisms required for the activation of the NLRP3 inflammasome and secretion of mature IL-1β. In the first mechanism, α toxin secreted from internalized S. aureus produces a pore, allowing the internalized bacteria and associated pathogen-associated molecular patterns to interact with intracellular TLR2 and, to a lesser extent, TLR1. In the second mechanism, α toxin forms a pore in the plasma membrane, leading to an efflux of cytosolic K+ and influx of Ca2+. We conclude that α toxin by these two different mechanisms triggers the synthesis of pro-IL-1β and NLRP3 components, activation of capase-1, and secretion of mature IL-1β to defend against bacterial infection.
Collapse
Affiliation(s)
- Dayu Li
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Boston, MA, United States
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
| | - Robin Hodges
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Boston, MA, United States
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
| | - Maria AukrustNaqvi
- Department of Life Sciences and Health Faculty of Health Sciences Oslo Metropolitan University, Oslo, Norway
| | - Jeffrey Bair
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Boston, MA, United States
| | - Paulo J. M. Bispo
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
- Massachusetts Eye and Ear, Boston, MA, United States
| | - Michael S. Gilmore
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
- Massachusetts Eye and Ear, Boston, MA, United States
| | - Meredith Gregory-Ksander
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Boston, MA, United States
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
| | - Darlene A. Dartt
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Boston, MA, United States
- Department of Ophthalmology Harvard Medical School, Boston, MA, United States
| |
Collapse
|
2
|
Lee D, Nakai A, Miwa Y, Negishi K, Tomita Y, Kurihara T. Pemafibrate prevents choroidal neovascularization in a mouse model of neovascular age-related macular degeneration. PeerJ 2023; 11:e14611. [PMID: 36643635 PMCID: PMC9838199 DOI: 10.7717/peerj.14611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/30/2022] [Indexed: 01/12/2023] Open
Abstract
Background Pathological choroidal neovascularization (CNV) is one of the major causes of visual impairment in neovascular age-related macular degeneration (AMD). CNV has been suppressed by using anti-vascular endothelial growth factor (VEGF) antibodies. However, some clinical cases have demonstrated the failure of anti-VEGF therapies. Furthermore, anti-VEGF agents might induce the development of ocular atrophy. Recently, peroxisome proliferator-activated receptor alpha (PPARα) activation using pemafibrate treatment was suggested as one of the promising therapeutic targets in the prevention of ocular ischemia. However, the preventive role of pemafibrate remains unclear in CNV. We aimed to examine the preventive role of pemafibrate on laser-induced pathological CNV. Methods Adult male C57BL/6 mice were orally supplied pemafibrate (0.5 mg/kg) for four days, followed by laser irradiation. Then, pemafibrate was consecutively given to mice with the same condition. CNV was visualized with isolectin-IB4. The eye (retina and/or retinal pigment epithelium [RPE]-choroid), liver, and serum were used for biomolecular analyses. Results We found that pemafibrate administration suppressed CNV volumes. Pemafibrate administration activated PPARα downstream genes in the liver and eye (especially, RPE-choroid). Furthermore, pemafibrate administration elevated serum fibroblast growth factor 21 levels and reduced serum levels of triglycerides. Conclusions Our data suggest a promising pemafibrate therapy for suppressing CNV in AMD.
Collapse
Affiliation(s)
- Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Ayaka Nakai
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Nihon University School of Medicine, Tokyo, Japan
| | - Yukihiro Miwa
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan,Aichi Animal Eye Clinics, Aichi, Japan
| | - Kazuno Negishi
- Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Yohei Tomita
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| |
Collapse
|
3
|
Deng N, Zhao Y, Xu J, Ouyang H, Wu Z, Lai W, Lu Y, Lin H, Zhang Y, Lu D. Molecular characterization and functional study of the NLRP3 inflammasome genes in Tetraodon nigroviridis. FISH & SHELLFISH IMMUNOLOGY 2022; 131:570-581. [PMID: 36257557 DOI: 10.1016/j.fsi.2022.10.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/03/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome is an important inflammasome in mammals, which is of great significance to eliminate pathogens. However, the research of the NLRP3 inflammasome in teleost is limited. Tetraodon nigroviridis has the characteristics of small genome and easy feeding, which can be used as a model for the study of fish immune function. In present study, three NLRP3 inflammasome component genes (NLRP3, ASC and caspase-1) in T. nigroviridis has been cloned. Real-time fluorescence quantitative PCR showed that TnNLRP3 (T. nigroviridis NLRP3), TnASC (T. nigroviridis ASC) and Tncaspase-1 (T. nigroviridis caspase-1) mRNA in various tissues from health T. nigroviridis were highly expressed in immune-related tissues, such as spleen, gill, head kidney and intestine. After Vibrio parahemolyticus infection, the expression of TnNLRP3, TnASC and Tncaspase-1 mRNA in spleen, gill, head kidney reached a peak at 24 h, and the expression levels of these genes in intestine were the highest at 48 h. After the transfection of TnASC-pAcGFP-N1 monomer GFP plasmid into cos-7 cells, ASC specks, the activation marker of NLRP3 inflammasome, were observed. Bimolecular fluorescence complementarity and fluorescence colocation experiment showed that TnASC and Tncaspase-1 of TnNLRP3 inflammasome were co-located near the cell nucleus, and potentially interacted with each other. NLRP3 inflammasome inducer nigericin and agonist ATP could significantly induce the expression of TnNLRP3, TnASC and Tncaspase-1 mRNA, and activation of NLRP3 inflammasome could promote the generation of mature TnIL-1β (T. nigroviridis IL-1β). These results uncover that T. nigroviridis NLRP3 inflammasome could participate in the antibacterial immune response and the generation of mature TnIL-1β after activation.
Collapse
Affiliation(s)
- Niuniu Deng
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Yulin Zhao
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Jiachang Xu
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Haofeng Ouyang
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Ziyi Wu
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Wenjie Lai
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Yuyou Lu
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Haoran Lin
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266373, PR China; College of Ocean, Hainan University, Haikou, 570228, PR China
| | - Yong Zhang
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China
| | - Danqi Lu
- State Key Laboratory of Biocontrol and School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, Sun Yat-Sen University, Guangzhou, 510275, PR China.
| |
Collapse
|
4
|
Wu Z, Ma L, Lin P, Dai Z, Lu Z, Yan L, Zhou C, Qian ZJ, Hong P, Li C. Extracellular vesicles derived from Pinctada martensii mucus regulate skin inflammation via the NF-κB/NLRP3/MAPK pathway. Biochem Biophys Res Commun 2022; 634:10-19. [DOI: 10.1016/j.bbrc.2022.09.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 11/02/2022]
|
5
|
Zhao H, Wang H, Liu R, Liang Y, Li K, Shan S, An L, Yang G, Li H. Activation of the NLRP1 inflammasome and its ligand recognition in the antibacterial immune response of common carp (Cyprinus carpio). FISH & SHELLFISH IMMUNOLOGY 2022; 125:238-246. [PMID: 35588906 DOI: 10.1016/j.fsi.2022.05.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/27/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
NLRP1 (NLR family pyrin domain containing 1) is the first member of NOD-like receptors (NLRs) which can form inflammasome and play critical roles in innate immunity and pathogenesis of various diseases. To date, many NLRs and inflammasome-related genes have been identified in teleost, however, the activation of NLRP1 inflammasome is only found in zebrafish, and the activator of fish NLRP1 is unclear. In the present study, the activation of CcNLRP1 inflammasome and its function in innate immune defence of common carp was investigated. The expression of CcNLRP1 was induced in immune-related tissues of common carp upon challenge with Edwardsiella tarda and Aeromonas hydrophila. The colocalization of CcNLRP1 and CcASC, ASC oligomerization, and interaction between CcNLRP1CARD and CcASC was observed in 293T, Hela and EPC cells, suggesting that the CcNLRP1 inflammasome was activated in common carp. Furthermore, we found that MDP may be the specific ligand of CcNLRP1, which can activate the CcNLRP1 inflammasome. Taken together, the present study identifies a new inflammasome in common carp, and is beneficial to the control of infectious diseases in carp farming.
Collapse
Affiliation(s)
- Huaping Zhao
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Hui Wang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Rongrong Liu
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Yaxin Liang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Kaimin Li
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Shijuan Shan
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Liguo An
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China
| | - Guiwen Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China.
| | - Hua Li
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, 250014, PR China.
| |
Collapse
|
6
|
Li W, Mao X, Wang X, Liu Y, Wang K, Li C, Li T, Zhang Y, Lin N. Disease-Modifying Anti-rheumatic Drug Prescription Baihu-Guizhi Decoction Attenuates Rheumatoid Arthritis via Suppressing Toll-Like Receptor 4-mediated NLRP3 Inflammasome Activation. Front Pharmacol 2021; 12:743086. [PMID: 34675809 PMCID: PMC8525175 DOI: 10.3389/fphar.2021.743086] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 08/31/2021] [Indexed: 11/13/2022] Open
Abstract
As a traditional Chinese medicine-originated disease-modifying anti-rheumatic drug prescription, Baihu-Guizhi decoction (BHGZD) is extensively used for the treatment of rheumatoid arthritis (RA) with a satisfying therapeutic efficacy. Mechanically, our previous data indicated that BHGZD may ameliorate RA partially by restoring the balance of the “inflammation-immune” system through regulating the TLR4-c-Fos-IL2-TNF-alpha axis. Toll-like receptor 4 (TLR4) has been revealed to be involved in the activation of the NLR family pyrin domain containing 3 (NLRP3) inflammasome complex. Thus, the aim of the current study was to determine the regulatory effects of BHGZD on the TLR4–mediated inflammasome activation during RA progression based on the modified adjuvant-induced arthritis model (AIA-M) and the lipopolysaccharide/adenosine triphosphate (LPS/ATP)–induced pyroptosis cellular models. As a result, oral administration of BHGZD exhibited prominent improvement in the disease severity of AIA-M rats, such as reducing the redness and swelling of joints, arthritis incidence, arthritic scores, and diameter of the limb and increasing pain thresholds. In line with the in vivo findings, BHGZD treatment effectively inhibited the LPS/ATP–induced pyroptosis of both Raw264.7 macrophage and MH7A cells in vitro by reducing pyroptotic cell death morphology (swollen cells) and decreasing propidium iodide–positive and terminal deoxynucleotidyl transferase–mediated dUTP-fluorescein nick end labeling (TUNEL)–positive cells. Notably, the increased expression levels of TLR4, NLRP3, interleukin 1β, and interleukin 18 proteins and the elevated activities of caspase-1 and lactic dehydrogenase in in vivo and in vitro disease models were markedly reversed by the treatment with BHGZD. In conclusion, the above findings proved the immunomodulatory and anti-inflammatory activities of BHGZD, especially in pyroptosis, which may be attributed to the activation of TLR4–mediated NLRP3 inflammasome signaling.
Collapse
Affiliation(s)
- Weijie Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xia Mao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiaoyue Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yudong Liu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kexin Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Congchong Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Taixian Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yanqiong Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Na Lin
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| |
Collapse
|
7
|
Deletion of TLR4 reduces apoptosis and improves histology in a murine kidney transplant model. Sci Rep 2021; 11:16182. [PMID: 34376755 PMCID: PMC8355104 DOI: 10.1038/s41598-021-95504-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 07/07/2021] [Indexed: 12/04/2022] Open
Abstract
Acute kidney injury (AKI) after transplantation of human deceased donor kidneys is associated with upregulation of tubular toll like receptor 4 (TLR4), but whether TLR4 is required for AKI is unknown. We hypothesized that TLR4 knockout mice (TLR4KO) subjected to cold ischemia followed by kidney transplant (CI + Txp) would be protected from AKI. C57Bl/6J wild type or TLR4KO kidneys were subjected to CI + Txp into wild type recipients. Tubular cell apoptosis, tubular injury and cast formation were significantly improved in recipients of TLR4KO kidneys. TLR4KO kidneys also demonstrated significantly decreased expression of the effector caspase 8. Brush border injury scores and serum creatinine were not different in recipients of TLR4KO versus wild type kidneys. Phosphorylated RIP3 and MLKL through which TLR4 signals programmed necrosis were expressed in both recipient groups. In addition, TNF-α and TNFR1 expression were significantly increased in recipient serum and TLR4KO kidneys respectively after CI + Txp, suggesting continued activation of programmed necrosis despite TLR4 deletion. Our results suggest that TLR4 deletion decreases apoptosis via inhibition of the death receptor pathway and decreases tubular injury and cast formation.
Collapse
|
8
|
Morimoto N, Kono T, Sakai M, Hikima JI. Inflammasomes in Teleosts: Structures and Mechanisms That Induce Pyroptosis during Bacterial Infection. Int J Mol Sci 2021; 22:4389. [PMID: 33922312 PMCID: PMC8122782 DOI: 10.3390/ijms22094389] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 02/06/2023] Open
Abstract
Pattern recognition receptors (PRRs) play a crucial role in inducing inflammatory responses; they recognize pathogen-associated molecular patterns, damage-associated molecular patterns, and environmental factors. Nucleotide-binding oligomerization domain-leucine-rich repeat-containing receptors (NLRs) are part of the PRR family; they form a large multiple-protein complex called the inflammasome in the cytosol. In mammals, the inflammasome consists of an NLR, used as a sensor molecule, apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) as an adaptor protein, and pro-caspase1 (Casp1). Inflammasome activation induces Casp1 activation, promoting the maturation of proinflammatory cytokines, such as interleukin (IL)-1β and IL-18, and the induction of inflammatory cell death called pyroptosis via gasdermin D cleavage in mammals. Inflammasome activation and pyroptosis in mammals play important roles in protecting the host from pathogen infection. Recently, numerous inflammasome-related genes in teleosts have been identified, and their conservation and/or differentiation between their expression in mammals and teleosts have also been elucidated. In this review, we summarize the current knowledge of the molecular structure and machinery of the inflammasomes and the ASC-spec to induce pyroptosis; moreover, we explore the protective role of the inflammasome against pathogenic infection in teleosts.
Collapse
Affiliation(s)
- Natsuki Morimoto
- Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan;
| | - Tomoya Kono
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (T.K.); (M.S.)
| | - Masahiro Sakai
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (T.K.); (M.S.)
| | - Jun-ichi Hikima
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (T.K.); (M.S.)
| |
Collapse
|
9
|
Caputo V, Strafella C, Termine A, Dattola A, Mazzilli S, Lanna C, Cosio T, Campione E, Novelli G, Giardina E, Cascella R. Overview of the molecular determinants contributing to the expression of Psoriasis and Psoriatic Arthritis phenotypes. J Cell Mol Med 2020; 24:13554-13563. [PMID: 33128843 PMCID: PMC7754002 DOI: 10.1111/jcmm.15742] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 07/07/2020] [Accepted: 07/30/2020] [Indexed: 12/17/2022] Open
Abstract
Psoriasis and psoriatic arthritis are multifactorial chronic disorders whose etiopathogenesis essentially derives from the alteration of several signalling pathways and the co-occurrence of genetic, epigenetic and non-genetic susceptibility factors that altogether affect the functional and structural property of the skin. Although shared and differential susceptibility genes and molecular pathways are known to contribute to the onset of pathological phenotypes, further research is needed to dissect the molecular causes of psoriatic disease and its progression towards Psoriatic Arthritis. This review will therefore be addressed to explore differences and similarities in the etiopathogenesis and progression of both disorders, with a particular focus on genes involved in the maintenance of the skin structure and integrity (keratins and collagens), modulation of patterns of recognition (through Toll-like receptors and dectin-1) and immuno-inflammatory response (by NLRP3-dependent inflammasome) to microbial pathogens. In addition, special emphasis will be given to the contribution of epigenetic elements (methylation pattern, non-coding RNAs, chromatin modifiers and 3D genome organization) to the etiopathogenesis and progression of psoriasis and psoriatic arthritis. The evidence discussed in this review highlights how the knowledge of patients' clinical and (epi)genomic make-up could be helpful for improving the available therapeutic strategies for psoriasis and psoriatic arthritis treatment.
Collapse
Affiliation(s)
- Valerio Caputo
- Medical Genetics LaboratoryDepartment of Biomedicine and PreventionTor Vergata UniversityRomeItaly
- Genomic Medicine Laboratory UILDMIRCCS Santa Lucia FoundationRomeItaly
| | - Claudia Strafella
- Medical Genetics LaboratoryDepartment of Biomedicine and PreventionTor Vergata UniversityRomeItaly
- Genomic Medicine Laboratory UILDMIRCCS Santa Lucia FoundationRomeItaly
| | - Andrea Termine
- Genomic Medicine Laboratory UILDMIRCCS Santa Lucia FoundationRomeItaly
| | - Annunziata Dattola
- Dermatologic ClinicDepartment of Systems MedicineTor Vergata UniversityRomeItaly
| | - Sara Mazzilli
- Dermatologic ClinicDepartment of Systems MedicineTor Vergata UniversityRomeItaly
| | - Caterina Lanna
- Dermatologic ClinicDepartment of Systems MedicineTor Vergata UniversityRomeItaly
| | - Terenzio Cosio
- Dermatologic ClinicDepartment of Systems MedicineTor Vergata UniversityRomeItaly
| | - Elena Campione
- Dermatologic ClinicDepartment of Systems MedicineTor Vergata UniversityRomeItaly
| | - Giuseppe Novelli
- Medical Genetics LaboratoryDepartment of Biomedicine and PreventionTor Vergata UniversityRomeItaly
- Neuromed Institute IRCCSPozzilliItaly
| | - Emiliano Giardina
- Genomic Medicine Laboratory UILDMIRCCS Santa Lucia FoundationRomeItaly
- Department of Biomedicine and PreventionUILDM Lazio Onlus FoundationTor Vergata UniversityRomeItaly
| | - Raffaella Cascella
- Medical Genetics LaboratoryDepartment of Biomedicine and PreventionTor Vergata UniversityRomeItaly
- Department of Biomedical SciencesCatholic University Our Lady of Good CounselTiranaAlbania
| |
Collapse
|
10
|
Baudouin C, Kolko M, Melik-Parsadaniantz S, Messmer EM. Inflammation in Glaucoma: From the back to the front of the eye, and beyond. Prog Retin Eye Res 2020; 83:100916. [PMID: 33075485 DOI: 10.1016/j.preteyeres.2020.100916] [Citation(s) in RCA: 168] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 02/08/2023]
Abstract
The pathophysiology of glaucoma is complex, multifactorial and not completely understood. Elevated intraocular pressure (IOP) and/or impaired retinal blood flow may cause initial optic nerve damage. In addition, age-related oxidative stress in the retina concurrently with chronic mechanical and vascular stress is crucial for the initiation of retinal neurodegeneration. Oxidative stress is closely related to cell senescence, mitochondrial dysfunction, excitotoxicity, and neuroinflammation, which are involved in glaucoma progression. Accumulating evidence from animal glaucoma models and from human ocular samples suggests a dysfunction of the para-inflammation in the retinal ganglion cell layer and the optic nerve head. Moreover, quite similar mechanisms in the anterior chamber could explain the trabecular meshwork dysfunction and the elevated IOP in primary open-angle glaucoma. On the other hand, ocular surface disease due to topical interventions is the most prominent and visible consequence of inflammation in glaucoma, with a negative impact on filtering surgery failure, topical treatment efficacy, and possibly on inflammation in the anterior segment. Consequently, glaucoma appears as an outstanding eye disease where inflammatory changes may be present to various extents and consequences along the eye structure, from the ocular surface to the posterior segment, and the visual pathway. Here we reviewed the inflammatory processes in all ocular structures in glaucoma from the back to the front of the eye and beyond. Our approach was to explain how para-inflammation is necessary to maintain homoeostasis, and to describe abnormal inflammatory findings observed in glaucomatous patients or in animal glaucoma models, supporting the hypothesis of a dysregulation of the inflammatory balance toward a pro-inflammatory phenotype. Possible anti-inflammatory therapeutic approaches in glaucoma are also discussed.
Collapse
Affiliation(s)
- Christophe Baudouin
- Quinze-Vingts National Ophthalmology Hospital, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France; Sorbonne Université, INSERM, CNRS, Institut de La Vision, Paris, France; Department of Ophthalmology, Ambroise Paré Hospital, APHP, Université de Versailles Saint-Quentin en Yvelines, Boulogne-Billancourt, France.
| | - Miriam Kolko
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark; Department of Ophthalmology, Copenhagen University Hospital, Rigshospitalet-Glostrup, Glostrup, Denmark
| | | | | |
Collapse
|
11
|
Dai Z, Zhang J, Wu Q, Fang H, Shi C, Li Z, Lin C, Tang D, Wang D. Intestinal microbiota: a new force in cancer immunotherapy. Cell Commun Signal 2020; 18:90. [PMID: 32522267 PMCID: PMC7288675 DOI: 10.1186/s12964-020-00599-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/18/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer displays high levels of heterogeneity and mutation potential, and curing cancer remains a challenge that clinicians and researchers are eager to overcome. In recent years, the emergence of cancer immunotherapy has brought hope to many patients with cancer. Cancer immunotherapy reactivates the immune function of immune cells by blocking immune checkpoints, thereby restoring the anti-tumor activity of immune cells. However, immune-related adverse events are a common complication of checkpoint blockade, which might be caused by the physiological role of checkpoint pathways in regulating adaptive immunity and preventing autoimmunity. In this context, the intestinal microbiota has shown great potential in the immunotherapy of cancer. The intestinal microbiota not only regulates the immune function of the body, but also optimizes the therapeutic effect of immune checkpoint inhibitors, thus reducing the occurrence of complications. Therefore, manipulating the intestinal microbiota is expected to enhance the effectiveness of immune checkpoint inhibitors and reduce adverse reactions, which will lead to new breakthroughs in immunotherapy and cancer management. Video abstract.
Collapse
Affiliation(s)
- Zhujiang Dai
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Jingqiu Zhang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Qi Wu
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Huiwen Fang
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chunfeng Shi
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Zhen Li
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chaobiao Lin
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Dong Tang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Daorong Wang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| |
Collapse
|
12
|
Das S, Shapiro B, Vucic EA, Vogt S, Bar-Sagi D. Tumor Cell-Derived IL1β Promotes Desmoplasia and Immune Suppression in Pancreatic Cancer. Cancer Res 2020; 80:1088-1101. [PMID: 31915130 PMCID: PMC7302116 DOI: 10.1158/0008-5472.can-19-2080] [Citation(s) in RCA: 185] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 11/22/2019] [Accepted: 12/31/2019] [Indexed: 12/20/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDA) is an aggressive malignancy typified by a highly stromal and weakly immunogenic tumor microenvironment that promotes tumor evolution and contributes to therapeutic resistance. Here, we demonstrate that PDA tumor cell-derived proinflammatory cytokine IL1β is essential for the establishment of the protumorigenic PDA microenvironment. Tumor cell-derived IL1β promoted the activation and secretory phenotype of quiescent pancreatic stellate cells and established an immunosuppressive milieu mediated by M2 macrophages, myeloid-derived suppressor cells, CD1dhiCD5+ regulatory B cells, and Th17 cells. Loss of tumor cell-derived IL1 signaling in tumor stroma enabled intratumoral infiltration and activation of CD8+ cytotoxic T cells, attenuated growth of pancreatic neoplasia, and conferred survival advantage to PDA-bearing mice. Accordingly, antibody-mediated neutralization of IL1β significantly enhanced the antitumor activity of α-PD-1 and was accompanied by increased tumor infiltration of CD8+ T cells. Tumor cell expression of IL1β in vivo was driven by microbial-dependent activation of toll-like receptor 4 (TLR4) signaling and subsequent engagement of the NLRP3 inflammasome. Collectively, these findings identify a hitherto unappreciated role for tumor cell-derived IL1β in orchestrating an immune-modulatory program that supports pancreatic tumorigenesis. SIGNIFICANCE: These findings identify a new modality for immune evasion in PDA that depends on IL1β production by tumor cells through TLR4-NLRP3 inflammasome activation. Targeting this axis might provide an effective PDA therapeutic strategy.
Collapse
MESH Headings
- Animals
- Antineoplastic Agents, Immunological/pharmacology
- Antineoplastic Agents, Immunological/therapeutic use
- CD8-Positive T-Lymphocytes/drug effects
- CD8-Positive T-Lymphocytes/immunology
- Carcinogenesis/immunology
- Carcinoma, Pancreatic Ductal/drug therapy
- Carcinoma, Pancreatic Ductal/immunology
- Carcinoma, Pancreatic Ductal/pathology
- Cell Line, Tumor/transplantation
- Disease Models, Animal
- Drug Synergism
- Epithelial Cells
- Female
- Humans
- Inflammasomes/immunology
- Inflammasomes/metabolism
- Interleukin-1beta/antagonists & inhibitors
- Interleukin-1beta/immunology
- Interleukin-1beta/metabolism
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Mice
- Mice, Transgenic
- NLR Family, Pyrin Domain-Containing 3 Protein/metabolism
- Pancreatic Ducts/cytology
- Pancreatic Neoplasms/drug therapy
- Pancreatic Neoplasms/immunology
- Pancreatic Neoplasms/pathology
- Primary Cell Culture
- Programmed Cell Death 1 Receptor/antagonists & inhibitors
- Programmed Cell Death 1 Receptor/immunology
- Signal Transduction/immunology
- Toll-Like Receptor 4/metabolism
- Tumor Escape/drug effects
- Tumor Escape/immunology
- Tumor Microenvironment/drug effects
- Tumor Microenvironment/immunology
Collapse
Affiliation(s)
- Shipra Das
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, New York
| | - Beny Shapiro
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, New York
| | - Emily A Vucic
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, New York
| | - Sandra Vogt
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, New York
| | - Dafna Bar-Sagi
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, New York.
| |
Collapse
|
13
|
Mercau ME, Calanni JS, Aranda ML, Caldareri LJ, Rosenstein RE, Repetto EM, Cymeryng CB. Melatonin prevents early pituitary dysfunction induced by sucrose-rich diets. J Pineal Res 2019; 66:e12545. [PMID: 30586198 DOI: 10.1111/jpi.12545] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 12/11/2018] [Accepted: 12/18/2018] [Indexed: 12/14/2022]
Abstract
While physiological levels of glucocorticoids are required to ensure proper functions of the body, consistently high levels may engender several deleterious consequences. We have previously shown an increase in the activity of the hypothalamic-pituitary-adrenal (HPA) axis in rats fed sucrose-rich diets (SRD). The main goal of this study was to analyze the processes involved in the modulation of the pituitary production of ACTH by SRD, and to test melatonin as a possible therapeutic agent for the prevention of the HPA axis dysfunction. Male Wistar rats were fed standard chow and either SRD (30% sucrose in the drinking water) or plain water for three weeks. Melatonin was administered as subcutaneous pellets. Results showed that SRD treatment induced an increase in systemic ACTH and corticosterone levels and a decrease in melatonin levels. In the pituitary gland, we also detected an increase in the expression levels of proopiomelanocortin (POMC) that was accompanied by increased levels of: lipoperoxides, nitro-tyrosine modified proteins, catalase, heme oxygenase-1, interleukin-1β mRNA, and by an increase in the tissue number of inflammatory cells (F4/80 and Iba-1 positive cells). Melatonin treatment prevented all these systemic and pituitary changes as well as the increase in POMC expression induced by incubation of AtT-20 corticotrophs with conditioned media obtained from stimulated macrophages. In conclusion, stimulation of POMC/ACTH production in rats fed a SRD could involve the generation of oxidative stress and inflammation in the pituitary gland. Melatonin treatment prevented these effects and normalized the activity of the HPA axis.
Collapse
Affiliation(s)
- María Elisa Mercau
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Juan Salvador Calanni
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Marcos Luis Aranda
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Lilian Julia Caldareri
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ruth Estela Rosenstein
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
- Facultad de Medicina, Departamento de Bioquímica Humana, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Esteban Martin Repetto
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
- Facultad de Farmacia y Bioquímica, Departamento de Bioquímica Clínica, Cátedra Bioquímica Clínica I, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Cora Beatriz Cymeryng
- Facultad de Medicina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Universidad de Buenos Aires, Buenos Aires, Argentina
- Facultad de Medicina, Departamento de Bioquímica Humana, Universidad de Buenos Aires, Buenos Aires, Argentina
| |
Collapse
|
14
|
Hyphae fragments from A. fumigatus sensitize lung cells to silica particles (Min-U-Sil): Increased release of IL-1β. Toxicol In Vitro 2018; 55:1-10. [PMID: 30414920 DOI: 10.1016/j.tiv.2018.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/30/2018] [Accepted: 11/05/2018] [Indexed: 12/16/2022]
Abstract
Exposure to particulate matter (PM), such as mineral particles and biological particles/components may be linked to aggravation of respiratory diseases, including asthma. Here we report that exposure to Aspergillus fumigatus hyphae fragments (AFH) and lipopolysaccharide (LPS) induced both mRNA synthesis and release of pro-inflammatory interleukin-1 beta (IL-1β) in both human THP-1 monocytes (THP-1 Mo) and phorbol 12-myristate 13-acetate (PMA)-differentiated THP-1 monocytes (THP-1 macrophages; THP-1 Ma); while Min-U-Sil alone enhanced the release of IL-1β only in THP-1 Ma. Co-exposure to LPS or AFH with Min-U-Sil caused a synergistic release of IL-1β when compared to single exposures. In contrast, Min-U-Sil did not markedly change LPS- and AFH-induced release of tumor necrosis factor alpha (TNF-α). The combined exposures did not increase the LPS- and AFH-induced expression of IL-1β mRNA. Notably, the AFH- and LPS-induced IL-1β responses with and without co-exposure to Min-U-Sil in THP-1 Mo were found to be caspase-dependent as shown by inhibition with zYVAD-fmk. Furthermore, co-exposure with AFH and Min-U-Sil resulted in similar synergistic releases of IL-1β in primary human airway macrophages (AM; sputum), peripheral blood monocyte-derived macrophages (MDM) and in the human bronchial epithelial cell line (BEAS-2B). In conclusion, AFH induce both the synthesis and release of IL-1β. However, Min-U-Sil further enhanced the cleavage of the induced pro-IL-1β.
Collapse
|
15
|
Müller-Calleja N, Köhler A, Siebald B, Canisius A, Orning C, Radsak M, Stein P, Mönnikes R, Lackner KJ. Cofactor-independent antiphospholipid antibodies activate the NLRP3-inflammasome via endosomal NADPH-oxidase: implications for the antiphospholipid syndrome. Thromb Haemost 2017; 113:1071-83. [DOI: 10.1160/th14-07-0628] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 11/25/2014] [Indexed: 01/05/2023]
Abstract
SummaryThe antiphospholipid syndrome (APS) is an autoimmune disease characterised by thromboembolic events and/or pregnancy morbidity in the presence of antiphospholipid antibodies (aPL). Here we show that three cofactor independent human monoclonal aPL can induce transcription of NLRP3 and caspase-1 resulting in inflammasome activation specific for NLRP3. This depends fully on activation of endosomal NADPH-oxidase-2 (NOX2) by aPL. Activation of NOX2 and subsequent inflammasome activation by aPL are independent from TLR2 or TLR4. While endosomal superoxide production induces caspase-1 and NLRP3 transcription, it does not affect prae-IL-1β transcription. Therefore, release of IL-1β occurs only after activation of additional pathways like TLR7/8 or TLR2. All effects exerted by the monoclonal aPL can be reproduced with IgG fractions of APS patients proving that the monoclonal aPL are representative for the APS. IgG fractions of healthy controls or patients suffering from systemic lupus erythematosus have no effect. In a mouse model of the APS we can show inflammasome activation in vivo. Furthermore, mononuclear cells isolated from patients with the APS show an increased expression of caspase-1 and NLRP3 which is accompanied by a three-fold increased serum concentration of IL-1β suggesting chronic inflammasome activation in APS patients. In summary, we provide further evidence that endosomal NOX2 can be activated by cofactor independent aPL. This leads to induction of the NLRP3 inflammasome. Our data indicate that cofactor independent aPL might contribute significantly to the pathogenesis of the APS.
Collapse
|
16
|
Arakelyan A, Nersisyan L, Poghosyan D, Khondkaryan L, Hakobyan A, Löffler-Wirth H, Melanitou E, Binder H. Autoimmunity and autoinflammation: A systems view on signaling pathway dysregulation profiles. PLoS One 2017; 12:e0187572. [PMID: 29099860 PMCID: PMC5669448 DOI: 10.1371/journal.pone.0187572] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 10/23/2017] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION Autoinflammatory and autoimmune disorders are characterized by aberrant changes in innate and adaptive immunity that may lead from an initial inflammatory state to an organ specific damage. These disorders possess heterogeneity in terms of affected organs and clinical phenotypes. However, despite the differences in etiology and phenotypic variations, they share genetic associations, treatment responses and clinical manifestations. The mechanisms involved in their initiation and development remain poorly understood, however the existence of some clear similarities between autoimmune and autoinflammatory disorders indicates variable degrees of interaction between immune-related mechanisms. METHODS Our study aims at contributing to a holistic, pathway-centered view on the inflammatory condition of autoimmune and autoinflammatory diseases. We have evaluated similarities and specificities of pathway activity changes in twelve autoimmune and autoinflammatory disorders by performing meta-analysis of publicly available gene expression datasets generated from peripheral blood mononuclear cells, using a bioinformatics pipeline that integrates Self Organizing Maps and Pathway Signal Flow algorithms along with KEGG pathway topologies. RESULTS AND CONCLUSIONS The results reveal that clinically divergent disease groups share common pathway perturbation profiles. We identified pathways, similarly perturbed in all the studied diseases, such as PI3K-Akt, Toll-like receptor, and NF-kappa B signaling, that serve as integrators of signals guiding immune cell polarization, migration, growth, survival and differentiation. Further, two clusters of diseases were identified based on specifically dysregulated pathways: one gathering mostly autoimmune and the other mainly autoinflammatory diseases. Cluster separation was driven not only by apparent involvement of pathways implicated in adaptive immunity in one case, and inflammation in the other, but also by processes not explicitly related to immune response, but rather representing various events related to the formation of specific pathophysiological environment. Thus, our data suggest that while all of the studied diseases are affected by activation of common inflammatory processes, disease-specific variations in their relative balance are also identified.
Collapse
Affiliation(s)
- Arsen Arakelyan
- Bioinformatics Group, Institute of Molecular Biology, National Academy of Sciences RA, Yerevan, Armenia
- Department of Bioinformatics and Bioengineering, Russian-Armenian University, Yerevan, Armenia
| | - Lilit Nersisyan
- Bioinformatics Group, Institute of Molecular Biology, National Academy of Sciences RA, Yerevan, Armenia
- Zaven and Sonia Akian College of Science and Engineering, American University of Armenia, Yerevan, Armenia
| | - David Poghosyan
- Group of Immune Response Regulation, Institute of Molecular Biology, National Academy of Sciences RA, Yerevan, Armenia
| | - Lusine Khondkaryan
- Group of Immune Response Regulation, Institute of Molecular Biology, National Academy of Sciences RA, Yerevan, Armenia
| | - Anna Hakobyan
- Bioinformatics Group, Institute of Molecular Biology, National Academy of Sciences RA, Yerevan, Armenia
| | - Henry Löffler-Wirth
- Interdisciplinary Centre for Bioinformatics, University of Leipzig, Leipzig, Germany
| | - Evie Melanitou
- Department of Parasitology and Insect Vectors, Institut Pasteur, Paris, France
| | - Hans Binder
- Interdisciplinary Centre for Bioinformatics, University of Leipzig, Leipzig, Germany
| |
Collapse
|
17
|
Kühbacher A, Henkel H, Stevens P, Grumaz C, Finkelmeier D, Burger-Kentischer A, Sohn K, Rupp S. Central Role for Dermal Fibroblasts in Skin Model Protection against Candida albicans. J Infect Dis 2017; 215:1742-1752. [PMID: 28368492 DOI: 10.1093/infdis/jix153] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/23/2017] [Indexed: 01/09/2023] Open
Abstract
The fungal pathogen Candida albicans colonizes basically all human epithelial surfaces, including the skin. Under certain conditions, such as immunosuppression, invasion of the epithelia occurs. Not much is known about defense mechanisms against C. albicans in subepithelial layers such as the dermis. Using immune cell-supplemented 3D skin models we defined a new role for fibroblasts in the dermis and identified a minimal set of cell types for skin protection against C. albicans invasion. Dual RNA sequencing of individual host cell populations and C. albicans revealed that dermal invasion is directly impeded by dermal fibroblasts. They are able to integrate signals from the pathogen and CD4+ T cells and shift toward an antimicrobial phenotype with broad specificity that is dependent on Toll-like receptor 2 and interleukin 1β. These results highlight a central function of dermal fibroblasts for skin protection, opening new possibilities for treatment of infectious diseases.
Collapse
Affiliation(s)
- Andreas Kühbacher
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology
| | - Helena Henkel
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology
| | - Philip Stevens
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology.,Center for Integrative Bioinformatics Vienna, Max F. Perutz Laboratories, University of Vienna, Medical University of Vienna, Austria
| | - Christian Grumaz
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology
| | - Doris Finkelmeier
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology
| | - Anke Burger-Kentischer
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology.,Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Germany
| | - Kai Sohn
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology.,Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Germany
| | - Steffen Rupp
- Department of Molecular Biotechnology, Fraunhofer Institute for Interfacial Engineering and Biotechnology.,Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Germany
| |
Collapse
|
18
|
Zhao Y, Forst CV, Sayegh CE, Wang IM, Yang X, Zhang B. Molecular and genetic inflammation networks in major human diseases. MOLECULAR BIOSYSTEMS 2017; 12:2318-41. [PMID: 27303926 DOI: 10.1039/c6mb00240d] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It has been well-recognized that inflammation alongside tissue repair and damage maintaining tissue homeostasis determines the initiation and progression of complex diseases. Albeit with the accomplishment of having captured the most critical inflammation-involved molecules, genetic susceptibilities, epigenetic factors, and environmental factors, our schemata on the role of inflammation in complex diseases remain largely patchy, in part due to the success of reductionism in terms of research methodology per se. Omics data alongside the advances in data integration technologies have enabled reconstruction of molecular and genetic inflammation networks which shed light on the underlying pathophysiology of complex diseases or clinical conditions. Given the proven beneficial role of anti-inflammation in coronary heart disease as well as other complex diseases and immunotherapy as a revolutionary transition in oncology, it becomes timely to review our current understanding of the molecular and genetic inflammation networks underlying major human diseases. In this review, we first briefly discuss the complexity of infectious diseases and then highlight recently uncovered molecular and genetic inflammation networks in other major human diseases including obesity, type II diabetes, coronary heart disease, late onset Alzheimer's disease, Parkinson's disease, and sporadic cancer. The commonality and specificity of these molecular networks are addressed in the context of genetics based on genome-wide association study (GWAS). The double-sword role of inflammation, such as how the aberrant type 1 and/or type 2 immunity leads to chronic and severe clinical conditions, remains open in terms of the inflammasome and the core inflammatome network features. Increasingly available large Omics and clinical data in tandem with systems biology approaches have offered an exciting yet challenging opportunity toward reconstruction of more comprehensive and dynamic molecular and genetic inflammation networks, which hold great promise in transiting network snapshots to video-style multi-scale interplays of disease mechanisms, in turn leading to effective clinical intervention.
Collapse
Affiliation(s)
- Yongzhong Zhao
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| | - Christian V Forst
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| | - Camil E Sayegh
- Vertex Pharmaceuticals (Canada) Incorporated, 275 Armand-Frappier, Laval, Quebec H7V 4A7, Canada
| | - I-Ming Wang
- Informatics and Analysis, Merck Research Laboratories, Merck & Co., Inc., 770 Sumneytown Pike, West Point, PA 19486, USA.
| | - Xia Yang
- Department of Integrative Biology and Physiology, University of California, Los Angeles, CA 90025, USA.
| | - Bin Zhang
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| |
Collapse
|
19
|
Pillon NJ, Chan KL, Zhang S, Mejdani M, Jacobson MR, Ducos A, Bilan PJ, Niu W, Klip A. Saturated fatty acids activate caspase-4/5 in human monocytes, triggering IL-1β and IL-18 release. Am J Physiol Endocrinol Metab 2016; 311:E825-E835. [PMID: 27624102 DOI: 10.1152/ajpendo.00296.2016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/11/2016] [Indexed: 12/14/2022]
Abstract
Obesity is associated with metabolic tissue infiltration by monocyte-derived macrophages. Saturated fatty acids contribute to proinflammatory gene induction in tissue-embedded immune cells. However, it is unknown how circulating monocytes, the macrophage precursors, react to high-fat environments. In macrophages, saturated fatty acids activate inflammatory pathways and, notably, prime caspase-associated inflammasomes. Inflammasome-activated IL-1β contributes to type 2 diabetes. We hypothesized that 1) human monocytes from obese patients show caspase activation, and 2) fatty acids trigger this response and consequent release of IL-1β/IL-18. Human peripheral blood monocytes were sorted by flow cytometry, and caspase activity was measured with a FLICA dye-based assay. Blood monocytes from obese individuals exhibited elevated caspase activity. To explore the nature and consequence of this activity, human THP1 monocytes were exposed to saturated or unsaturated fatty acids. Caspase activity was revealed by isoform-specific cleavage and enzymatic activity; cytokine expression/release was measured by qPCR and ELISA. Palmitate, but not palmitoleate, increased caspase activity in parallel to the release of IL-1β and IL-18. Palmitate induced eventual monocyte cell death with features of pyroptosis (an inflammation-linked cell death program involving caspase-4/5), scored through LDH release, vital dye influx, cell volume changes, and nuclear morphology. Notably, selective gene silencing or inhibition of caspase-4/5 reduced palmitate-induced release of IL-1β and IL-18. In summary, monocytes from obese individuals present elevated caspase activity. Mechanistically, palmitate activates a pyroptotic program in monocytes through caspase-4/5, causing inflammatory cytokine release, additional to inflammasomes. These caspases represent potential, novel, therapeutic targets to taper obesity-associated inflammation.
Collapse
Affiliation(s)
- Nicolas J Pillon
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Kenny L Chan
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Shitian Zhang
- Department of Immunology, Key Laboratory of Immuno Microenvironment and Disease of the Educational Ministry of China, Tianjin Medical University, Tianjin, China; and
| | - Marios Mejdani
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Maya R Jacobson
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Alexandre Ducos
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Philip J Bilan
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Wenyan Niu
- Department of Immunology, Key Laboratory of Immuno Microenvironment and Disease of the Educational Ministry of China, Tianjin Medical University, Tianjin, China; and
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Amira Klip
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada;
| |
Collapse
|
20
|
Vordenbäumen S, Saenger T, Braukmann A, Tahan T, Bleck E, Jose J, Schneider M. Human casein alpha s1 induces proinflammatory cytokine expression in monocytic cells by TLR4 signaling. Mol Nutr Food Res 2016; 60:1079-89. [DOI: 10.1002/mnfr.201500792] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 01/13/2016] [Accepted: 02/04/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Stefan Vordenbäumen
- Medical Faculty, Department of Rheumatology and Hiller Research Unit Rheumatology; Heinrich-Heine-University Düsseldorf; Düsseldorf Germany
| | - Thorsten Saenger
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus; Westfälische Wilhelms-University Münster; Münster Germany
| | - Achim Braukmann
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus; Westfälische Wilhelms-University Münster; Münster Germany
| | - Tamara Tahan
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus; Westfälische Wilhelms-University Münster; Münster Germany
| | - Ellen Bleck
- Medical Faculty, Department of Rheumatology and Hiller Research Unit Rheumatology; Heinrich-Heine-University Düsseldorf; Düsseldorf Germany
| | - Joachim Jose
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus; Westfälische Wilhelms-University Münster; Münster Germany
| | - Matthias Schneider
- Medical Faculty, Department of Rheumatology and Hiller Research Unit Rheumatology; Heinrich-Heine-University Düsseldorf; Düsseldorf Germany
| |
Collapse
|
21
|
Kang JW, Kim SJ, Cho HI, Lee SM. DAMPs activating innate immune responses in sepsis. Ageing Res Rev 2015; 24:54-65. [PMID: 25816752 DOI: 10.1016/j.arr.2015.03.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 03/09/2015] [Accepted: 03/13/2015] [Indexed: 12/11/2022]
Abstract
Sepsis refers to the deleterious and non-resolving systemic inflammatory response of the host to microbial infection and is the leading cause of death in intensive care units. The pathogenesis of sepsis is highly complex. It is principally attributable to dysregulation of the innate immune system. Damage-associated molecular patterns (DAMPs) are actively secreted by innate immune cells and/or released passively by injured or damaged cells in response to infection or injury. In the present review, we highlight emerging evidence that supports the notion that extracellular DAMPs act as crucial proinflammatory danger signals. Furthermore, we discuss the potential of a wide array of DAMPs as therapeutic targets in sepsis.
Collapse
Affiliation(s)
- Jung-Woo Kang
- School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Jangan-gu, Suwon, Gyeonggi-do, 440-746 South Korea
| | - So-Jin Kim
- School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Jangan-gu, Suwon, Gyeonggi-do, 440-746 South Korea
| | - Hong-Ik Cho
- School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Jangan-gu, Suwon, Gyeonggi-do, 440-746 South Korea
| | - Sun-Mee Lee
- School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Jangan-gu, Suwon, Gyeonggi-do, 440-746 South Korea.
| |
Collapse
|
22
|
Caspase-8 promotes NLRP1/NLRP3 inflammasome activation and IL-1β production in acute glaucoma. Proc Natl Acad Sci U S A 2014; 111:11181-6. [PMID: 25024200 DOI: 10.1073/pnas.1402819111] [Citation(s) in RCA: 219] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Acute glaucoma is a sight-threatening condition characterized by a sudden and substantial rise in intraocular pressure (IOP) and consequent retinal ganglion cell (RGC) death. Angle closure glaucoma, a common cause of glaucoma in Asia that affects tens of millions of people worldwide, often presents acutely with loss of vision, pain, and high IOP. Even when medical and surgical treatment is available, acute angle closure glaucoma can cause permanent and irreversible loss of vision. Toll-like receptor 4 (TLR4) signaling has been previously implicated in the pathogenesis of IOP-induced RGC death, although the underlying mechanisms are largely unknown. In the present study, we used an acute IOP elevation/glaucoma model to investigate the underlying mechanism of RGC death. We found that TLR4 leads to increased caspase-8 expression; this elevation increases IL-1β expression and RGC death via a caspase-1-dependent pathway involving Nod-like receptor family, pyrin domain containing 1 (NLRP1)/NLRP3 inflammasomes and a caspase-1-independent pathway. We show that inhibition of caspase-8 activation significantly attenuates RGC death by down-regulating the activation of NLRP1 and NLRP3, thus demonstrating the pivotal role of caspase-8 in the TLR4-mediated activation of inflammasomes. These findings demonstrate collectively a critical role of caspase-8 in transducing TLR4-mediated IL-1β production and RGC death and highlight signal transduction in a caspase-1-dependent NLRP1/NLRP3 inflammasome pathway and a caspase-1-independent pathway in acute glaucoma. These results provide new insight into the pathogenesis of glaucoma and point to a treatment strategy.
Collapse
|
23
|
Tiwari RL, Singh V, Singh A, Rana M, Verma A, Kothari N, Kohli M, Bogra J, Dikshit M, Barthwal MK. PKCδ-IRAK1 axis regulates oxidized LDL-induced IL-1β production in monocytes. J Lipid Res 2014; 55:1226-44. [PMID: 24792928 DOI: 10.1194/jlr.m045658] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Indexed: 12/19/2022] Open
Abstract
This study examined the role of interleukin (IL)-1 receptor-associated kinase (IRAK) and protein kinase C (PKC) in oxidized LDL (Ox-LDL)-induced monocyte IL-1β production. In THP1 cells, Ox-LDL induced time-dependent secretory IL-1β and IRAK1 activity; IRAK4, IRAK3, and CD36 protein expression; PKCδ-JNK1 phosphorylation; and AP-1 activation. IRAK1/4 siRNA and inhibitor (INH)-attenuated Ox-LDL induced secreted IL-1β and pro-IL-1β mRNA and pro-IL-1β and mature IL-1β protein expression, respectively. Diphenyleneiodonium chloride (NADPH oxidase INH) and N-acetylcysteine (free radical scavenger) attenuated Ox-LDL-induced reactive oxygen species generation, caspase-1 activity, and pro-IL-1β and mature IL-1β expression. Ox-LDL-induced secretory IL-1β production was abrogated in the presence of JNK INH II, Tanshinone IIa, Ro-31-8220, Go6976, Rottlerin, and PKCδ siRNA. PKCδ siRNA attenuated the Ox-LDL-induced increase in IRAK1 kinase activity, JNK1 phosphorylation, and AP-1 activation. In THP1 macrophages, CD36, toll-like receptor (TLR)2, TLR4, TLR6, and PKCδ siRNA prevented Ox-LDL-induced PKCδ and IRAK1 activation and IL-1β production. Enhanced Ox-LDL and IL-1β in systemic inflammatory response syndrome (SIRS) patient plasma demonstrated positive correlation with each other and with disease severity scores. Ox-LDL-containing plasma induced PKCδ and IRAK1 phosphorylation and IL-1β production in a CD36-, TLR2-, TLR4-, and TLR6-dependent manner in primary human monocytes. Results suggest involvement of CD36, TLR2, TLR4, TLR6, and the PKCδ-IRAK1-JNK1-AP-1 axis in Ox-LDL-induced IL-1β production.
Collapse
Affiliation(s)
- Rajiv Lochan Tiwari
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| | - Vishal Singh
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| | - Ankita Singh
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| | - Minakshi Rana
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| | - Anupam Verma
- Department of Transfusion Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Nikhil Kothari
- Department of Anaesthesia, King George's Medical University, Lucknow, India
| | - Monica Kohli
- Department of Anaesthesia, King George's Medical University, Lucknow, India
| | - Jaishri Bogra
- Department of Anaesthesia, King George's Medical University, Lucknow, India
| | - Madhu Dikshit
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| | - Manoj Kumar Barthwal
- Pharmacology Division, Council of Scientific and Industrial Research-Central Drug Research Institute, Lucknow, India
| |
Collapse
|
24
|
Abstract
Hematopoietic stem and progenitor cells with inactivated Fanconi anemia (FA) genes, FANCA and FANCC, are hypersensitive to inflammatory cytokines. One of these, tumor necrosis factor α (TNF-α), is also overproduced by FA mononuclear phagocytes in response to certain Toll-like receptor (TLR) agonists, creating an autoinhibitory loop that may contribute to the pathogenesis of progressive bone marrow (BM) failure and selection of TNF-α-resistant leukemic stem cell clones. In macrophages, the TNF-α overproduction phenotype depends on p38 mitogen-activated protein kinase (MAPK), an enzyme also known to induce expression of other inflammatory cytokines, including interleukin 1β (IL-1β). Reasoning that IL-1β might be involved in a like autoinhibitory loop, we determined that (1) TLR activation of FANCA- and FANCC-deficient macrophages induced overproduction of both TNF-α and IL-1β in a p38-dependent manner; (2) exposure of Fancc-deficient BM progenitors to IL-1β potently suppressed the expansion of multipotent progenitor cells in vitro; and (3) although TNF-α overexpression in FA cells is controlled posttranscriptionally by the p38 substrate MAPKAPK-2, p38-dependent overproduction of IL-1β is controlled transcriptionally. We suggest that multiple inflammatory cytokines overproduced by FANCA- and FANCC-deficient mononuclear phagocytes may contribute to the progressive BM failure that characterizes FA, and that to achieve suppression of this proinflammatory state, p38 is a more promising molecular therapeutic target than either IL-1β or TNF-α alone.
Collapse
|
25
|
A role for uric acid and the Nalp3 inflammasome in antiphospholipid antibody-induced IL-1β production by human first trimester trophoblast. PLoS One 2013; 8:e65237. [PMID: 23762324 PMCID: PMC3675211 DOI: 10.1371/journal.pone.0065237] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/23/2013] [Indexed: 11/19/2022] Open
Abstract
Women with antiphospholipid syndrome (APS) are at risk of recurrent pregnancy loss and obstetrical disorders, such as preeclampsia and intrauterine growth restriction (IUGR). Antiphospholipid antibodies (aPL) directly target the placenta by binding beta2-glycoprotein I (β2GPI) expressed on the trophoblast. We recently demonstrated in human first trimester trophoblast cells that anti-β2GPI antibodies (Abs) induce the secretion of IL-1β in a Toll-like receptor 4 (TLR4)-dependent manner. IL-1β secretion requires processing of pro-IL-1β and this is mediated by the inflammasome, a complex of Nalp3, apoptosis-associated speck-like protein containing a CARD (ASC) and caspase-1. The objective of this study was to determine if aPL induce IL-1β production in trophoblast via the inflammasome. Using a human first trimester trophoblast cell line, we demonstrated that a mouse anti-β2GPI mAb and human polyclonal aPL-IgG induce IL-1β processing and secretion, which was partially blocked upon caspase-1 inhibition. Nalp3 and ASC knockdown also attenuated anti-β2GPI Ab-induced IL-1β secretion. Furthermore, aPL stimulated the production of uric acid in a TLR4-dependent manner; and inhibition of uric acid prevented aPL-induced IL-1β production by the trophoblast. These findings demonstrate that aPL, via TLR4 activation, induce a uric acid response in human trophoblast, which in turn activates the Nalp3/ASC inflammasome leading to IL-1β processing and secretion. This novel mechanism may account for the inflammation at the maternal-fetal interface, which causes placental dysfunction and increases the risk of adverse pregnancy outcome in patients with APS.
Collapse
|
26
|
Abstract
Caspases are a family of endoproteases that provide critical links in cell regulatory networks controlling inflammation and cell death. The activation of these enzymes is tightly controlled by their production as inactive zymogens that gain catalytic activity following signaling events promoting their aggregation into dimers or macromolecular complexes. Activation of apoptotic caspases results in inactivation or activation of substrates, and the generation of a cascade of signaling events permitting the controlled demolition of cellular components. Activation of inflammatory caspases results in the production of active proinflammatory cytokines and the promotion of innate immune responses to various internal and external insults. Dysregulation of caspases underlies human diseases including cancer and inflammatory disorders, and major efforts to design better therapies for these diseases seek to understand how these enzymes work and how they can be controlled.
Collapse
Affiliation(s)
- David R McIlwain
- The Campbell Family Institute for Breast Cancer Research and Ontario Cancer Institute, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | | | | |
Collapse
|
27
|
Greenhalgh AD, Brough D, Robinson EM, Girard S, Rothwell NJ, Allan SM. Interleukin-1 receptor antagonist is beneficial after subarachnoid haemorrhage in rat by blocking haem-driven inflammatory pathology. Dis Model Mech 2012; 5:823-33. [PMID: 22679224 PMCID: PMC3484865 DOI: 10.1242/dmm.008557] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 04/23/2012] [Indexed: 12/19/2022] Open
Abstract
Subarachnoid haemorrhage (SAH) is a major contributor to the burden of stroke on society. Treatment options are limited and animal models of SAH do not always mimic key pathophysiological hallmarks of the disease, thus hindering development of new therapeutics. Inflammation is strongly associated with brain injury after SAH in animals and patients, and inhibition of the pro-inflammatory cytokine interleukin-1 (IL-1) represents a possible therapeutic target. Here we report that a rupture of the middle cerebral artery in the rat produces heterogeneous infarct patterns similar to those observed in human SAH. Administration of the IL-1 receptor antagonist (IL-1Ra) reduced blood-brain barrier breakdown, and the extent of breakdown correlated with brain injury. After SAH, haem oxygenase-1 (HO-1) was strongly expressed around the bleed site and in the cortex and striatum, indicating the presence of free haem, a breakdown product of haemoglobin. HO-1 expression was also found in the same regions as microglial/macrophage expression of IL-1α. The direct effect of haem on IL-1α expression was confirmed in vitro using organotypic slice culture (OSC). Haem-induced cell death was dependent on IL-1 signalling, with IL-1Ra completely blocking cellular injury. Furthermore, stimulation of mouse primary mixed glial cells with haem induced the release of IL-1α, but not IL-1β. Thus, we suggest that haem, released from lysed red blood cells (RBCs) in the subarachnoid space, acts as a danger-associated molecular pattern (DAMP) driving IL-1-dependent inflammation. These data provide new insights into inflammation after SAH-induced brain injury and suggest IL-1Ra as a candidate therapeutic for the disease.
Collapse
Affiliation(s)
- Andrew D Greenhalgh
- Faculty of Life Sciences, University of Manchester, Manchester, M13 9PL, UK.
| | | | | | | | | | | |
Collapse
|
28
|
Maeda S, Ohno K, Nakamura K, Uchida K, Nakashima K, Fukushima K, Tsukamoto A, Goto-Koshino Y, Fujino Y, Tsujimoto H. Mucosal imbalance of interleukin-1β and interleukin-1 receptor antagonist in canine inflammatory bowel disease. Vet J 2012; 194:66-70. [DOI: 10.1016/j.tvjl.2012.02.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 02/27/2012] [Accepted: 02/27/2012] [Indexed: 11/26/2022]
|
29
|
Nasti TH, Timares L. Inflammasome activation of IL-1 family mediators in response to cutaneous photodamage. Photochem Photobiol 2012; 88:1111-25. [PMID: 22631445 DOI: 10.1111/j.1751-1097.2012.01182.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Although keratinocytes are relatively resistant to ultraviolet radiation (UVR) induced damage, repeated UVR exposure result in accumulated DNA mutations that can lead to epidermal malignancies. Keratinocytes play a central role in elaborating innate responses that lead to inflammation and influence the generation of adaptive immune responses in skin. Apart from the minor cellular constituents of the epidermis, specifically Langerhans cells and melanocytes, keratinocytes are the major source of cytokines. UVR exposure stimulates keratinocytes to secrete abundant pro-inflammatory IL-1-family proteins, IL-1α, IL-1β, IL-18, and IL-33. Normal skin contains only low levels of inactive precursor forms of IL-1β and IL-18, which require caspase 1-mediated proteolysis for their maturation and secretion. However, caspase-1 activation is not constitutive, but dependents on the UV-induced formation of an active inflammasome complex. IL-1 family cytokines can induce a secondary cascade of mediators and cytokines from keratinocytes and other cells resulting in wide range of innate processes including infiltration of inflammatory leukocytes, induction of immunosuppression, DNA repair or apoptosis. Thus, the ability of keratinocytes to produce a wide repertoire of proinflammatory cytokines can influence the immune response locally as well as systematically, and alter the host response to photodamaged cells. We will highlight differential roles played by each IL-1 family molecule generated by UV-damaged keratinocytes, and reveal their complementary influences in modulating acute inflammatory and immunological events that follow cutaneous UV exposure.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | |
Collapse
|
30
|
Veenstra M, Ransohoff RM. Chemokine receptor CXCR2: physiology regulator and neuroinflammation controller? J Neuroimmunol 2012; 246:1-9. [PMID: 22445294 PMCID: PMC3335977 DOI: 10.1016/j.jneuroim.2012.02.016] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/23/2012] [Accepted: 02/25/2012] [Indexed: 01/05/2023]
Abstract
The innate immune system is a crucial component of inflammatory reactions, while the central nervous system (CNS) is the most vulnerable site of the body to inflammatory tissue injury. Neuroinflammatory brain pathologies are disorders in which the CNS is threatened by its own immune system. Chemokine receptor CXCR2 and its ligands have been implicated in several neuroinflammatory brain pathologies, as well as in neutrophil recruitment and in the developmental positioning of neural cells. This review focuses on the basics of CXCR2, its regulating role in bone marrow neutrophil recruitment, oligodendrocyte progenitor cell positioning and neural repair mechanisms, as well as its diverse roles in neuroinflammatory brain pathologies.
Collapse
Affiliation(s)
- Mike Veenstra
- Neuroinflammation Research Center, Department of Neuroscience, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
- Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Richard M. Ransohoff
- Neuroinflammation Research Center, Department of Neuroscience, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| |
Collapse
|
31
|
Chen CC, Tsai SH, Lu CC, Hu ST, Wu TS, Huang TT, Saïd-Sadier N, Ojcius DM, Lai HC. Activation of an NLRP3 inflammasome restricts Mycobacterium kansasii infection. PLoS One 2012; 7:e36292. [PMID: 22558425 PMCID: PMC3340363 DOI: 10.1371/journal.pone.0036292] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Accepted: 03/29/2012] [Indexed: 11/19/2022] Open
Abstract
Mycobacterium kansasii has emerged as an important nontuberculous mycobacterium pathogen, whose incidence and prevalence have been increasing in the last decade. M. kansasii can cause pulmonary tuberculosis clinically and radiographically indistinguishable from that caused by Mycobacterium tuberculosis infection. Unlike the widely-studied M. tuberculosis, little is known about the innate immune response against M. kansasii infection. Although inflammasome activation plays an important role in host defense against bacterial infection, its role against atypical mycobacteria remains poorly understood. In this report, the role of inflammasome activity in THP-1 macrophages against M. kansasii infection was studied. Results indicated that viable, but not heat-killed, M. kansasii induced caspase-1-dependent IL-1β secretion in macrophages. The underlying mechanism was found to be through activation of an inflammasome containing the NLR (Nod-like receptor) family member NLRP3 and the adaptor protein ASC (apoptosis-associated speck-like protein containing a CARD). Further, potassium efflux, lysosomal acidification, ROS production and cathepsin B release played a role in M. kansasii-induced inflammasome activation. Finally, the secreted IL-1β derived from caspase-1 activation was shown to restrict intracellular M. kansasii. These findings demonstrate a biological role for the NLRP3 inflammasome in host defense against M. kansasii.
Collapse
Affiliation(s)
- Chang-Chieh Chen
- Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan, Republic of China
| | - Sheng-Hui Tsai
- Institute of Microbiology and Immunology, School of Life Science, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Chia-Chen Lu
- Department of Respiratory Therapy, Fu Jen Catholic University, Taipei, Taiwan, Republic of China
| | - Shiau-Ting Hu
- Institute of Microbiology and Immunology, School of Life Science, National Yang-Ming University, Taipei, Taiwan, Republic of China
- Department of Microbiology and Immunology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Ting-Shu Wu
- Department of Internal Medicine, Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
| | - Tsung-Teng Huang
- Center for Molecular and Clinical Immunology, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Department of Medical Biotechnology and Laboratory Sciences, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Laboratory of Nanomaterials, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Research Center of Bacterial Pathogenesis, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
| | - Najwane Saïd-Sadier
- Health Sciences Research Institute and School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - David M. Ojcius
- Center for Molecular and Clinical Immunology, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Health Sciences Research Institute and School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Hsin-Chih Lai
- Center for Molecular and Clinical Immunology, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Department of Medical Biotechnology and Laboratory Sciences, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- Research Center of Bacterial Pathogenesis, Chang Gung University, Kweishan, Taoyuan, Taiwan, Republic of China
- * E-mail:
| |
Collapse
|
32
|
Catchpole B, Allenspach K. Canine inflammatory bowel disease: does innate immunity fail to discriminate between friend and foe? Vet J 2012; 194:7-8. [PMID: 22513299 DOI: 10.1016/j.tvjl.2012.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 03/13/2012] [Indexed: 01/24/2023]
|
33
|
Gavrilin MA, Abdelaziz DHA, Mostafa M, Abdulrahman BA, Grandhi J, Akhter A, Abu Khweek A, Aubert DF, Valvano MA, Wewers MD, Amer AO. Activation of the pyrin inflammasome by intracellular Burkholderia cenocepacia. THE JOURNAL OF IMMUNOLOGY 2012; 188:3469-77. [PMID: 22368275 DOI: 10.4049/jimmunol.1102272] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Burkholderia cenocepacia is an opportunistic pathogen that causes chronic infection and induces progressive respiratory inflammation in cystic fibrosis patients. Recognition of bacteria by mononuclear cells generally results in the activation of caspase-1 and processing of IL-1β, a major proinflammatory cytokine. In this study, we report that human pyrin is required to detect intracellular B. cenocepacia leading to IL-1β processing and release. This inflammatory response involves the host adapter molecule ASC and the bacterial type VI secretion system (T6SS). Human monocytes and THP-1 cells stably expressing either small interfering RNA against pyrin or YFP-pyrin and ASC (YFP-ASC) were infected with B. cenocepacia and analyzed for inflammasome activation. B. cenocepacia efficiently activates the inflammasome and IL-1β release in monocytes and THP-1. Suppression of pyrin levels in monocytes and THP-1 cells reduced caspase-1 activation and IL-1β release in response to B. cenocepacia challenge. In contrast, overexpression of pyrin or ASC induced a robust IL-1β response to B. cenocepacia, which correlated with enhanced host cell death. Inflammasome activation was significantly reduced in cells infected with T6SS-defective mutants of B. cenocepacia, suggesting that the inflammatory reaction is likely induced by an as yet uncharacterized effector(s) of the T6SS. Together, we show for the first time, to our knowledge, that in human mononuclear cells infected with B. cenocepacia, pyrin associates with caspase-1 and ASC forming an inflammasome that upregulates mononuclear cell IL-1β processing and release.
Collapse
Affiliation(s)
- Mikhail A Gavrilin
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Lacroix-Lamandé S, Fanton d’Andon M, Michel E, Ratet G, Philpott DJ, Girardin SE, Boneca IG, Vandewalle A, Werts C. Downregulation of the Na/K-ATPase Pump by Leptospiral Glycolipoprotein Activates the NLRP3 Inflammasome. THE JOURNAL OF IMMUNOLOGY 2012; 188:2805-14. [DOI: 10.4049/jimmunol.1101987] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
35
|
Martin WJ, Shaw O, Liu X, Steiger S, Harper JL. Monosodium urate monohydrate crystal-recruited noninflammatory monocytes differentiate into M1-like proinflammatory macrophages in a peritoneal murine model of gout. ACTA ACUST UNITED AC 2011; 63:1322-32. [PMID: 21538316 DOI: 10.1002/art.30249] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To profile monosodium urate monohydrate (MSU) crystal-recruited monocyte inflammatory function during the course of in vivo differentiation, in a murine model of peritoneal MSU crystal-induced inflammation. METHODS C57BL/6J mice were injected intraperitoneally with MSU crystals, and the peritoneal cells were harvested at different time points. The MSU crystal-recruited monocyte/macrophage population was analyzed for the expression of differentiation and activation markers, cytokine production following MSU crystal restimulation ex vivo and in vivo, expression of NLRP3-associated proteins (ASC, caspase 1) and pro-interleukin-1β (proIL-1β), and phagocytic capacity. RESULTS Monocytes recruited 8 hours after MSU crystal stimulation (F4/80(low) Gr-1(int) 7/4+) exhibited poor phagocytic capacity, expressed low levels of proIL-1β, and failed to produce proinflammatory cytokines in response to MSU crystal restimulation. In the absence of MSU crystal restimulation, differentiating monocytes produced low levels of transforming growth factor β1 ex vivo, and this was abrogated following MSU crystal restimulation. Over time these cells developed a proinflammatory phenotype in vivo, characterized by the production of IL-1β, tumor necrosis factor α, IL-6, CCL2 (monocyte chemotactic protein 1), and CXCL1 (cytokine-induced neutrophil chemoattractant) following ex vivo MSU crystal restimulation, and leading to IL-1β production and cell infiltration following MSU crystal rechallenge in vivo. Proinflammatory function was associated with differentiation toward a macrophage phenotype (F4/80(high) Gr-1-7/4-), an increase in phagocytic capacity, and an increase in the expression of proIL-1β. CONCLUSION MSU crystal-recruited monocytes differentiate into proinflammatory M1-like macrophages in vivo. This proinflammatory macrophage phenotype is likely to play a key role in perpetuating inflammation in gouty arthritis in the presence of ongoing deposition of fresh MSU crystals.
Collapse
|
36
|
Gorbunov NV, Garrison BR, Kiang JG. Response of crypt paneth cells in the small intestine following total-body gamma-irradiation. Int J Immunopathol Pharmacol 2011; 23:1111-23. [PMID: 21244760 DOI: 10.1177/039463201002300415] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Ionizing irradiation causes damage and functional failure of irradiation-sensitive systems and tissues such as small intestine. The molecular mechanisms underlying inflammatory and adaptive responses to acute irradiation damage are poorly understood. Using a mouse model of total-body γ-irradiation, we assessed the irradiation response of crypt host-defense Paneth cells by measuring alpha-defensin 4 (AD4) expression and correlated the gathered data with activation of the caspase-1/IL-1β inflammatory signaling cascade. The irradiation injury was produced in CD2F1 mice exposed to 9.25 Gy γ-radiation. This dose resulted in 85-100 percent mortality at the 15(th) day post-irradiation. Small intestine tissue samples were collected at the 7th day post-irradiation. Assessment of irradiation-associated pro-inflammatory alterations in small intestine tissue and expression of AD4 in Paneth cells was conducted using confocal immunofluorescence imaging, transmission electron microscopy (TEM), light microscopy, and immunoblotting techniques. The small intestine analysis revealed an increase in the precursor form of IL-1β, the activated form of IL-1β, and the activated form of caspase-1 (p10 CASP-1) at the 7(th) day post-irradiation. Immunoprecipitation analysis showed increased interaction between IL-1β and p10 CASP-1 after irradiation. This effect was observed in the irradiated small intestine and CD15-positive Paneth cells using confocal imaging techniques. The pro-inflammatory alterations in Paneth cells were accompanied by increases in AD4 mRNA and its 8 kD peptide product. Paneth cell secretory activity was observed at the sites of bacterial translocation in the crypt lumens. These data suggest that Paneth cells can contribute to small intestine inflammatory remodeling during the post-irradiation period.
Collapse
Affiliation(s)
- N V Gorbunov
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc, USA
| | | | | |
Collapse
|
37
|
Misra A, Hickey AJ, Rossi C, Borchard G, Terada H, Makino K, Fourie PB, Colombo P. Inhaled drug therapy for treatment of tuberculosis. Tuberculosis (Edinb) 2011; 91:71-81. [DOI: 10.1016/j.tube.2010.08.009] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 08/12/2010] [Accepted: 08/29/2010] [Indexed: 11/16/2022]
|
38
|
Kotrange S, Kopp B, Akhter A, Abdelaziz D, Abu Khweek A, Caution K, Abdulrahman B, Wewers MD, McCoy K, Marsh C, Loutet SA, Ortega X, Valvano MA, Amer AO. Burkholderia cenocepacia O polysaccharide chain contributes to caspase-1-dependent IL-1beta production in macrophages. J Leukoc Biol 2010; 89:481-8. [PMID: 21178113 DOI: 10.1189/jlb.0910513] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Burkholderia cenocepacia infections in CF patients involve heightened inflammation, fatal sepsis, and high antibiotic resistance. Proinflammatory IL-1β secretion is important in airway inflammation and tissue damage. However, little is known about this pathway in macrophages upon B. cenocepacia infection. We report here that murine macrophages infected with B. cenocepacia K56-2 produce proinflammatory cytokine IL-1β in a TLR4 and caspase-1-mediated manner. We also determined that the OPS (O antigen) of B. cenocepacia LPS contributes to IL-1β production and pyroptotic cell death. Furthermore, we showed that the malfunction of the CFTR channel augmented IL-1β production upon B. cenocepacia infection of murine macrophages. Taken together, we identified eukaryotic and bacterial factors that contribute to inflammation during B. cenocepacia infection, which may aid in the design of novel approaches to control pulmonary inflammation.
Collapse
Affiliation(s)
- Sheetal Kotrange
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Center for Microbial Interface Biology and the Department of Internal Medicine, Ohio State University, Columbus, Ohio 43210, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Sommer P, Sweeney G. Functional and mechanistic integration of infection and the metabolic syndrome. KOREAN DIABETES JOURNAL 2010; 34:71-6. [PMID: 20548837 PMCID: PMC2883353 DOI: 10.4093/kdj.2010.34.2.71] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The metabolic syndrome refers to a well defined group of risk factors, including central obesity and inflammation, for the development of diabetes and cardiovascular disease. Interestingly, many studies have recently led to the emergence of somewhat unexpected relationships between several infectious diseases and various aspects of the metabolic syndrome. Our understanding of the mechanisms underlying these interactions is also rapidly developing and some of these are summarized in this article. We will focus first on bacterial infection, and most notably the role of gut microbiota in regulaton of both obesity and inflammation. In particular, we focus on the role of inflammasomes and propose that understanding the role of Toll-like receptors and Nod-like receptors in the pathogenesis of inflammatory disorders with or without infection may provide novel targets for prevention and/or treatment of associated diseases. Secondly, chronic bacterial or viral infection and emerging links with metabolism will be reviewed. Finally, consideratons of biomarkers for metabolic syndrome, in particular lipocalin-2, and their link with infection will be discussed.
Collapse
Affiliation(s)
- Peter Sommer
- Cell Biology of Retroviruses Group, Institut Pasteur Korea, Seongnam, Korea
| | | |
Collapse
|
40
|
O'Flaherty S, Klaenhammer TR. The role and potential of probiotic bacteria in the gut, and the communication between gut microflora and gut/host. Int Dairy J 2010. [DOI: 10.1016/j.idairyj.2009.11.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
41
|
O'Flaherty S, Saulnier DM, Pot B, Versalovic J. How can probiotics and prebiotics impact mucosal immunity? Gut Microbes 2010; 1:293-300. [PMID: 21327037 PMCID: PMC3023613 DOI: 10.4161/gmic.1.5.12924] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2010] [Accepted: 07/07/2010] [Indexed: 02/03/2023] Open
Abstract
The study of probiotics and prebiotics is an expanding field of interest and scientific research that has resulted in insights related to the host immune response. Recent advances have naturally led to key questions. What are the specific probiotic components that mediate immunomodulation? Can we extrapolate the results of in vitro studies in animal and human trials? Which biomarkers and immune parameters should be measured in probiotic and prebiotic intervention studies? These questions were part of a discussion entitled "How Can Probiotics and Prebiotics Impact Mucosal Immunity" at the 2009 Annual Meeting of the International Scientific Association for Probiotics and Prebiotics (ISAPP). This review highlights recent knowledge about the modulation of mucosal immunity by probiotics and prebiotics, as well as considerations for measuring their effects on mucosal immunity. A list of biomarkers and immune parameters to be measured in human clinical trials is included.
Collapse
Affiliation(s)
- Sarah O'Flaherty
- Department of Food, Bioprocessing and Nutrition Sciences; North Carolina State University; Raleigh, NC USA
| | - Delphine M Saulnier
- Department of Pathology and Immunology; Baylor College of Medicine; Texas Children's Hospital; Houston, TX USA,Department of Pathology and Texas Children's Microbiome Center; Texas Children's Hospital; Houston, TX USA
| | - Bruno Pot
- Bactéries Lactiques et Immunité des Muqueuses; Institut Pasteur de Lille; Lille, France
| | - James Versalovic
- Department of Pathology and Immunology; Baylor College of Medicine; Texas Children's Hospital; Houston, TX USA,Department of Pathology and Texas Children's Microbiome Center; Texas Children's Hospital; Houston, TX USA
| |
Collapse
|
42
|
Salvesen GS, Riedl SJ. Structure of the Fas/FADD complex: a conditional death domain complex mediating signaling by receptor clustering. Cell Cycle 2009; 8:2723-7. [PMID: 19652545 DOI: 10.4161/cc.8.17.9399] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Death domain complexes are key protein arrangements in the regulation of various cellular signaling events. One of the most prominent death domain complexes first described in the initiation of apoptosis is formed by the transmembrane receptor Fas, the cytosolic adaptor protein FADD, and caspase-8 and is referred to as the Fas/FADD/caspase-8 death inducing signaling complex (DISC). The recent structure of the Fas/FADD death domain complex reveals how formation of this signaling platform can be stringently regulated utilizing only Fas receptor clustering to form a death domain network. This work reveals that an opening mechanism of Fas is needed to expose binding sites for the FADD death domain and sets the stage for a conditional interaction, which is characterized by weak interactions adapted for a regulatory function. The overall crystal structure reveals a tetrameric arrangement of four primary Fas/FADD complexes. Intriguingly all contacts mediating the tetramer are solely provided through Fas/Fas interactions and are entirely dependent on the open form. These findings are instrumental in depicting a mechanism for DISC regulation where Fas receptor clustering leads to the stabilization of the open Fas death domains which are then capable of binding FADD in a weak interaction. At the same time this mechanism ensures that in the absence of a sufficient stimulus no interaction between Fas and FADD is possible. Therefore the conformation dependent, conditional Fas/FADD death domain interaction represents the regulatory element per se. This interaction contrasts the classic constitutive interactions of adaptor domains, which cannot provide regulatory function themselves. This model portrays how sole death domains are able to mediate signaling upon receptor clustering in the complete absence of enzyme activity.
Collapse
Affiliation(s)
- Guy S Salvesen
- The Burnham Institute for Medical Research, La Jolla, CA 92037, USA
| | | |
Collapse
|
43
|
Babelova A, Moreth K, Tsalastra-Greul W, Zeng-Brouwers J, Eickelberg O, Young MF, Bruckner P, Pfeilschifter J, Schaefer RM, Gröne HJ, Schaefer L. Biglycan, a danger signal that activates the NLRP3 inflammasome via toll-like and P2X receptors. J Biol Chem 2009; 284:24035-48. [PMID: 19605353 DOI: 10.1074/jbc.m109.014266] [Citation(s) in RCA: 348] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The role of endogenous inducers of inflammation is poorly understood. To produce the proinflammatory master cytokine interleukin (IL)-1beta, macrophages need double stimulation with ligands to both Toll-like receptors (TLRs) for IL-1beta gene transcription and nucleotide-binding oligomerization domain-like receptors for activation of the inflammasome. It is particularly intriguing to define how this complex regulation is mediated in the absence of an infectious trigger. Biglycan, a ubiquitous leucine-rich repeat proteoglycan of the extracellular matrix, interacts with TLR2/4 on macrophages. The objective of this study was to define the role of biglycan in the synthesis and activation of IL-1beta. Here we show that in macrophages, soluble biglycan induces the NLRP3/ASC inflammasome, activating caspase-1 and releasing mature IL-1beta without the need for additional costimulatory factors. This is brought about by the interaction of biglycan with TLR2/4 and purinergic P2X(4)/P2X(7) receptors, which induces receptor cooperativity. Furthermore, reactive oxygen species formation is involved in biglycan-mediated activation of the inflammasome. By signaling through TLR2/4, biglycan stimulates the expression of NLRP3 and pro-IL-1beta mRNA. Both in a model of non-infectious inflammatory renal injury (unilateral ureteral obstruction) and in lipopolysaccharide-induced sepsis, biglycan-deficient mice displayed lower levels of active caspase-1 and mature IL-1beta in the kidney, lung, and circulation. Our results provide evidence for direct activation of the NLRP3 inflammasome by biglycan and describe a fundamental paradigm of how tissue stress or injury is monitored by innate immune receptors detecting the release of the extracellular matrix components and turning such a signal into a robust inflammatory response.
Collapse
Affiliation(s)
- Andrea Babelova
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, 60590 Frankfurt am Main, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Gavrilin MA, Mitra S, Seshadri S, Nateri J, Berhe F, Hall MW, Wewers MD. Pyrin critical to macrophage IL-1beta response to Francisella challenge. THE JOURNAL OF IMMUNOLOGY 2009; 182:7982-9. [PMID: 19494323 DOI: 10.4049/jimmunol.0803073] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Relative to monocytes, human macrophages are deficient in their ability to process and release IL-1beta. In an effort to explain this difference, we used a model of IL-1beta processing and release that is dependent upon bacterial escape into the cytosol. Fresh human blood monocytes were compared with monocyte-derived macrophages (MDM) for their IL-1beta release in response to challenge with Francisella novicida. Although both cell types produced similar levels of IL-1beta mRNA and intracellular pro-IL-1beta, only monocytes readily released processed mature IL-1beta. Baseline mRNA expression profiling of candidate genes revealed a remarkable deficiency in the pyrin gene, MEFV, expression in MDM compared with monocytes. Immunoblots confirmed a corresponding deficit in MDM pyrin protein. To determine whether pyrin levels were responsible for the monocyte/MDM difference in mature IL-1beta release, pyrin expression was knocked down by nucleofecting small interfering RNA against pyrin into monocytes or stably transducing small interfering RNA against pyrin into the monocyte cell line, THP-1. Pyrin knockdown was associated with a significant drop in IL-1beta release in both cell types. Importantly, M-CSF treatment of MDM restored pyrin levels and IL-1beta release. Similarly, the stable expression of pyrin in PMA-stimulated THP-1-derived macrophages induces caspase-1 activation, associated with increased IL-1beta release after infection with F. novicida. In summary, intracellular pyrin levels positively regulate MDM IL-1beta responsiveness to Francisella challenge.
Collapse
Affiliation(s)
- Mikhail A Gavrilin
- Division of Pulmonary Allergy Critical Care and Sleep Medicine, Davis Heart and Lung Research Institute, Ohio State University, Columbus, OH 43210, USA.
| | | | | | | | | | | | | |
Collapse
|
45
|
Balistreri CR, Colonna-Romano G, Lio D, Candore G, Caruso C. TLR4 polymorphisms and ageing: implications for the pathophysiology of age-related diseases. J Clin Immunol 2009; 29:406-15. [PMID: 19459036 DOI: 10.1007/s10875-009-9297-5] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Accepted: 04/15/2009] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Innate immunity provides a first line of host defense against infection by recognizing and killing microbes while simultaneously activating an instructive immune response. Toll-like receptors (TLRs) are principal mediators of rapid microbial recognition and function mainly by detection of pathogen-associated molecular patterns that do not exist in the host. Recognition of their ligands leads to a series of signaling events resulting in acute host responses, involved in killing pathogens. DISCUSSION We describe the involvement of TLR4 polymorphisms in ageing, and in particular in age-related diseases, suggesting the crucial role of molecules of innate immunity in pathophysiology of these diseases. Hence, we observed that pro-inflammatory alleles may be related to unsuccessful ageing, such as Alzheimer's disease, prostate cancer, and atherosclerosis; in contrast, the control of inflammation by anti-inflammatory alleles may result in increased longevity and successful ageing. Finally, a possible therapeutic approach to delay age-related diseases is outlined.
Collapse
Affiliation(s)
- Carmela Rita Balistreri
- Gruppo di Studio sull'Immunosenescenza, Dipartimento di Biopatologia e Metodologie Biomediche dell'Università di Palermo, Corso Tukory, Palermo, Italy.
| | | | | | | | | |
Collapse
|