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Zhu C, Zheng R, Han X, Tang Z, Li F, Hu X, Lin R, Shen J, Pei Q, Wang R, Wei G, Peng Z, Chen W, Liang Z, Zhou Y. Knockout of integrin αvβ6 protects against renal inflammation in chronic kidney disease by reduction of pro-inflammatory macrophages. Cell Death Dis 2024; 15:397. [PMID: 38844455 PMCID: PMC11156928 DOI: 10.1038/s41419-024-06785-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/09/2024]
Abstract
Integrin αvβ6 holds promise as a therapeutic target for organ fibrosis, yet targeted therapies are hampered by concerns over inflammatory-related side effects. The role of αvβ6 in renal inflammation remains unknown, and clarifying this issue is crucial for αvβ6-targeted treatment of chronic kidney disease (CKD). Here, we revealed a remarkable positive correlation between overexpressed αvβ6 in proximal tubule cells (PTCs) and renal inflammation in CKD patients and mouse models. Notably, knockout of αvβ6 not only significantly alleviated renal fibrosis but also reduced inflammatory responses in mice, especially the infiltration of pro-inflammatory macrophages. Furthermore, conditional knockout of αvβ6 in PTCs in vivo and co-culture of PTCs with macrophages in vitro showed that depleting αvβ6 in PTCs suppressed the migration and pro-inflammatory differentiation of macrophages. Screening of macrophage activators showed that αvβ6 in PTCs activates macrophages via secreting IL-34. IL-34 produced by PTCs was significantly diminished by αvβ6 silencing, and reintroduction of IL-34 restored macrophage activities, while anti-IL-34 antibody restrained macrophage activities enhanced by αvβ6 overexpression. Moreover, RNA-sequencing of PTCs and verification experiments demonstrated that silencing αvβ6 in PTCs blocked hypoxia-stimulated IL-34 upregulation and secretion by inhibiting YAP expression, dephosphorylation, and nuclear translocation, which resulted in the activation of Hippo signaling. While application of a YAP agonist effectively recurred IL-34 production by PTCs, enhancing the subsequent macrophage migration and activation. Besides, reduced IL-34 expression and YAP activation were also observed in global or PTCs-specific αvβ6-deficient injured kidneys. Collectively, our research elucidates the pro-inflammatory function and YAP/IL-34/macrophage axis-mediated mechanism of αvβ6 in renal inflammation, providing a solid rationale for the use of αvβ6 inhibition to treat kidney inflammation and fibrosis.
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Affiliation(s)
- Changjian Zhu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Ruilin Zheng
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Xu Han
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Ziwen Tang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Feng Li
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Xinrong Hu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Ruoni Lin
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Jiani Shen
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Qiaoqiao Pei
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Rong Wang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China
| | - Guangyan Wei
- Department of Radiation Oncology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Zhenwei Peng
- Department of Radiation Oncology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Wei Chen
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China.
| | - Zhou Liang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China.
| | - Yi Zhou
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, 510080, China.
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Danaher P, Hasle N, Nguyen ED, Hayward K, Rosenwasser N, Alpers CE, Reed RC, Okamura DM, Baxter SK, Jackson SW. Single cell spatial transcriptomic profiling of childhood-onset lupus nephritis reveals complex interactions between kidney stroma and infiltrating immune cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.09.566503. [PMID: 38014158 PMCID: PMC10680641 DOI: 10.1101/2023.11.09.566503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Children with systemic lupus erythematosus (SLE) are at increased risk of developing kidney disease, termed childhood-onset lupus nephritis (cLN). Single cell transcriptomics of dissociated kidney tissue has advanced our understanding of LN pathogenesis, but loss of spatial resolution prevents interrogation of in situ cellular interactions. Using a technical advance in spatial transcriptomics, we generated a spatially resolved, single cell resolution atlas of kidney tissue (>400,000 cells) from eight cLN patients and two controls. Annotated cells were assigned to 35 reference cell types, including major kidney subsets and infiltrating immune cells. Analysis of spatial distribution demonstrated that individual immune lineages localize to specific regions in cLN kidneys, including myeloid cells trafficking to inflamed glomeruli and B cells clustering within tubulointerstitial immune hotspots. Notably, gene expression varied as a function of tissue location, demonstrating how incorporation of spatial data can provide new insights into the immunopathogenesis of SLE. Alterations in immune phenotypes were accompanied by parallel changes in gene expression by resident kidney stromal cells. However, there was little correlation between histologic scoring of cLN disease activity and glomerular cell transcriptional signatures at the level of individual glomeruli. Finally, we identified modules of spatially-correlated gene expression with predicted roles in induction of inflammation and the development of tubulointerstitial fibrosis. In summary, single cell spatial transcriptomics allows unprecedented insights into the molecular heterogeneity of cLN, paving the way towards more targeted and personalized treatment approaches.
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Cho JM, Koh JH, Kim SG, Lee S, Kim Y, Cho S, Kim K, Kim YC, Han SS, Lee H, Lee JP, Joo KW, Lim CS, Kim YS, Kim DK, Park S. Mendelian randomization uncovers a protective effect of interleukin-1 receptor antagonist on kidney function. Commun Biol 2023; 6:722. [PMID: 37452175 PMCID: PMC10349143 DOI: 10.1038/s42003-023-05091-8] [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: 03/05/2023] [Accepted: 07/02/2023] [Indexed: 07/18/2023] Open
Abstract
Interleukins (ILs), key cytokine family of inflammatory response, are closely associated with kidney function. However, the causal effect of various ILs on kidney function needs further investigation. Here we show two-sample summary-level Mendelian randomization (MR) analysis that examined the causality between serum IL levels and kidney function. Genetic variants with strong association with serum IL levels were obtained from a previous genome-wide association study meta-analysis. Summary-level data for estimated glomerular filtration rate (eGFR) were obtained from CKDGen database. As a main MR analysis, multiplicative random-effects inverse-variance weighted method was performed. Pleiotropy-robust MR analysis, including MR-Egger with bootstrapped error and weighted median methods, were also implemented. We tested the causal estimates from nine ILs on eGFR traits. Among the results, higher genetically predicted serum IL-1 receptor antagonist level was significantly associated with higher eGFR values in the meta-analysis of CKDGen and the UK Biobank data. In addition, the result was consistent towards eGFR decline phenotype of the outcome database. Otherwise, nonsignificant association was identified between other genetically predicted ILs and eGFR outcome. These findings support the clinical importance of IL-1 receptor antagonist-associated pathway in relation to kidney function in the general individuals, particularly highlighting the importance of IL-1 receptor antagonist.
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Affiliation(s)
- Jeong Min Cho
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jung Hun Koh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Seong Geun Kim
- Department of Internal Medicine, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Soojin Lee
- Department of Internal Medicine, Uijeongbu Eulji University Medical Center, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yaerim Kim
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Semin Cho
- Department of Internal Medicine, Chung-Ang University Gwangmyeong Hospital, Gyeonggi-do, Korea
| | - Kwangsoo Kim
- Transdisciplinary Department of Medicine & Advanced Technology, Seoul National University Hospital, Seoul, Korea
| | - Yong Chul Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Seung Seok Han
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
| | - Hajeong Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jung Pyo Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea
| | - Kwon Wook Joo
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
| | - Chun Soo Lim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea
| | - Yon Su Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Dong Ki Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Kidney Research Institute, Seoul National University, Seoul, Korea
| | - Sehoon Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
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Nusshag C, Wei C, Hahm E, Hayek SS, Li J, Samelko B, Rupp C, Szudarek R, Speer C, Kälble F, Schaier M, Uhle F, Schmitt FC, Fiedler MO, Krautkrämer E, Cao Y, Rodriguez R, Merle U, Eugen-Olsen J, Zeier M, Weigand MA, Morath C, Brenner T, Reiser J. suPAR links a dysregulated immune response to tissue inflammation and sepsis-induced acute kidney injury. JCI Insight 2023; 8:165740. [PMID: 37036003 PMCID: PMC10132159 DOI: 10.1172/jci.insight.165740] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 02/21/2023] [Indexed: 04/11/2023] Open
Abstract
Acute kidney injury (AKI) secondary to sepsis results in poor outcomes and conventional kidney function indicators lack diagnostic value. Soluble urokinase plasminogen activator receptor (suPAR) is an innate immune-derived molecule implicated in inflammatory organ damage. We characterized the diagnostic ability of longitudinal serum suPAR levels to discriminate severity and course of sepsis-induced AKI (SI-AKI) in 200 critically ill patients meeting Sepsis-3 criteria. The pathophysiologic relevance of varying suPAR levels in SI-AKI was explored in a polymicrobial sepsis model in WT, (s)uPAR-knockout, and transgenic suPAR-overexpressing mice. At all time points studied, suPAR provided a robust classification of SI-AKI disease severity, with improved prediction of renal replacement therapy (RRT) and mortality compared with established kidney biomarkers. Patients with suPAR levels of greater than 12.7 ng/mL were at highest risk for RRT or death, with an adjusted odds ratio of 7.48 (95% CI, 3.00-18.63). suPAR deficiency protected mice against SI-AKI. suPAR-overexpressing mice exhibited greater kidney damage and poorer survival through inflamed kidneys, accompanied by local upregulation of potent chemoattractants and pronounced kidney T cell infiltration. Hence, suPAR allows for an innate immune-derived and kidney function-independent staging of SI-AKI and offers improved longitudinal risk stratification. suPAR promotes T cell-based kidney inflammation, while suPAR deficiency improves SI-AKI.
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Affiliation(s)
- Christian Nusshag
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | - Changli Wei
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | - Eunsil Hahm
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | - Salim S Hayek
- Department of Medicine, Division of Cardiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jing Li
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | - Beata Samelko
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | | | | | - Claudius Speer
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | - Florian Kälble
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | - Matthias Schaier
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | | | | | | | - Ellen Krautkrämer
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | - Yanxia Cao
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | - Ricardo Rodriguez
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
| | - Uta Merle
- Department of Gastroenterology, Heidelberg University Hospital, Heidelberg, Germany
| | - Jesper Eugen-Olsen
- Department of Clinical Research, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Martin Zeier
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Christian Morath
- Department of Nephrology, Heidelberg University Hospital, Heidelberg, Germany
| | - Thorsten Brenner
- Department of Anesthesiology, and
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Jochen Reiser
- Department of Internal Medicine, RUSH University Medical Center, Chicago, Illinois, USA
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5
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Chen Z, Li J, Sun Y, Wang C, Yang W, Ma M, Luo Z, Yang K, Chen L. A novel predictive model for poor in-hospital outcomes in patients with acute kidney injury after cardiac surgery. J Thorac Cardiovasc Surg 2023; 165:1180-1191.e7. [PMID: 34112503 DOI: 10.1016/j.jtcvs.2021.04.085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 04/13/2021] [Accepted: 04/20/2021] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Patients with cardiac surgery-associated acute kidney injury are at risk of renal replacement therapy and in-hospital death. We aimed to develop and validate a novel predictive model for poor in-hospital outcomes among patients with cardiac surgery-associated acute kidney injury. METHODS A total of 196 patients diagnosed with cardiac surgery-associated acute kidney injury were enrolled in this study as the training cohort, and 32 blood cytokines were measured. Least absolute shrinkage and selection operator regression and random forest quantile-classifier were performed to identify the key blood predictors for in-hospital composite outcomes (requiring renal replacement therapy or in-hospital death). The logistic regression model incorporating the selected predictors was validated internally using bootstrapping and externally in an independent cohort (n = 52). RESULTS A change in serum creatinine (delta serum creatinine) and interleukin 16 and interleukin 8 were selected as key predictors for composite outcomes. The logistic regression model incorporating interleukin 16, interleukin 8, and delta serum creatinine yielded the optimal performance, with decent discrimination (area under the receiver operating characteristic curve: 0.947; area under the precision-recall curve: 0.809) and excellent calibration (Brier score: 0.056, Hosmer-Lemeshow test P = .651). Application of the model in the validation cohort yielded good discrimination. A nomogram was generated for clinical use, and decision curve analysis demonstrated that the new model adds more net benefit than delta serum creatinine. CONCLUSIONS We developed and validated a promising predictive model for in-hospital composite outcomes among patients with cardiac surgery-associated acute kidney injury and demonstrated interleukin-16 and interleukin-8 as useful predictors to improve risk stratification for poor in-hospital outcomes among those with cardiac surgery-associated acute kidney injury.
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Affiliation(s)
- Zhongli Chen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Vascular & Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jiawei Li
- Department of Intensive Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yiping Sun
- Department of Cardiac Surgery, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Chuangshi Wang
- Medical Research and Biometrics Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Wenbo Yang
- Department of Vascular & Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Mingyang Ma
- National Computer System Engineering Research Institute of China, Beijing, China
| | - Zhe Luo
- Department of Intensive Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ke Yang
- Department of Vascular & Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Liang Chen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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Tavener SK, Jewell DE, Panickar KS. The Increase in Circulating Levels of Pro-Inflammatory Chemokines, Cytokines, and Complement C5 in Canines with Impaired Kidney Function. Curr Issues Mol Biol 2022; 44:1664-1676. [PMID: 35723372 PMCID: PMC9164022 DOI: 10.3390/cimb44040114] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 11/16/2022] Open
Abstract
Chronic low-grade inflammation is a key contributor to the progression of kidney disease. The release of cytokines and other pro-inflammatory proteins may further contribute to detrimental kidney health by increasing interstitial edema and renal fibrosis. The aim of the present study was to investigate the inflammatory markers in canines who developed renal disease naturally and were diagnosed with renal disease either during life or following necropsy, as assessed by a veterinarian. RNA was isolated from canine blood obtained at necropsy and stored as bioarchived samples from ten canines with renal disease (9.6−14.7 yr) and ten controls (10.1−14.8 yr). At the time of death, the mean blood creatinine concentration and BUN were elevated in dogs with renal disease compared to control (both p < 0.01). Samples were assessed for changes in gene expression using the Canine cytokine RT2 Profiler PCR Array for inflammation. There was a significant increase in C-C Motif Chemokine Ligand 16 (CCL16), C-X-C Motif Chemokine Ligand 5 (CXCL5), Interleukin 16 (IL-16), and Complement Component 5 (C5) (all p < 0.05 vs. con). In addition, there was also a statistically non-significant increase in 49 genes and a down-regulation in 35 genes from a panel of total 84 genes. Pro-inflammatory genes including CCL16, CXCL5, IL-16, and C5 can all contribute to renal inflammation and fibrosis through different signaling pathways and may lead to a progressive impairment of kidney function. Blockade of their activation may be important in ameliorating the initiation and/or the progression of renal disease.
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Affiliation(s)
- Selena K. Tavener
- Science & Technology Center, Hill’s Pet Nutrition, Inc., Topeka, KS 66617, USA;
| | - Dennis E. Jewell
- Department of Grain Science & Industry, Kansas State University, Manhattan, KS 66506, USA;
| | - Kiran S. Panickar
- Science & Technology Center, Hill’s Pet Nutrition, Inc., Topeka, KS 66617, USA;
- Correspondence: ; Tel.: 1-(785)-286-8002
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Jha AK, Gairola S, Kundu S, Doye P, Syed AM, Ram C, Murty US, Naidu VGM, Sahu BD. Toll-like receptor 4: An attractive therapeutic target for acute kidney injury. Life Sci 2021; 271:119155. [PMID: 33548286 DOI: 10.1016/j.lfs.2021.119155] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/14/2021] [Accepted: 01/22/2021] [Indexed: 12/11/2022]
Abstract
Acute kidney injury (AKI) is a progressive renal complication which significantly affects the patient's life with huge economic burden. Untreated acute kidney injury eventually progresses to a chronic form and end-stage renal disease. Although significant breakthroughs have been made in recent years, there are still no effective pharmacological therapies for the treatment of acute kidney injury. Toll-like receptor 4 (TLR4) is a well-characterized pattern recognition receptor, and increasing evidence has shown that TLR4 mediated inflammatory response plays a pivotal role in the pathogenesis of acute kidney injury. The expression of TLR4 has been seen in resident renal cells, including podocytes, mesangial cells, tubular epithelial cells and endothelial cells. Activation of TLR4 signaling regulates the transcription of numerous pro-inflammatory cytokines and chemokines, resulting in renal inflammation. Therefore, targeting TLR4 and its downstream effectors could serve as an effective therapeutic intervention to prevent renal inflammation and subsequent kidney damage. For the first time, this review summarizes the literature on acute kidney injury from the perspective of TLR4 from year 2010 to 2020. In the current review, the role of TLR4 signaling pathway in AKI with preclinical evidence is discussed. Furthermore, we have highlighted several compounds of natural and synthetic origin, which have the potential to avert the renal TLR4 signaling in preclinical AKI models and have shown protection against AKI. This scientific review provides new ideas for targeting TLR4 in the treatment of AKI and provides strategies for the drug development against AKI.
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Affiliation(s)
- Ankush Kumar Jha
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Shobhit Gairola
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Sourav Kundu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Pakpi Doye
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Abu Mohammad Syed
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Chetan Ram
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Upadhyayula Suryanarayana Murty
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - V G M Naidu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India
| | - Bidya Dhar Sahu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari PIN-781101, Assam, India.
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8
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Chen Z, Chen L, Yao G, Yang W, Yang K, Xiong C. Novel Blood Cytokine-Based Model for Predicting Severe Acute Kidney Injury and Poor Outcomes After Cardiac Surgery. J Am Heart Assoc 2020; 9:e018004. [PMID: 33131359 PMCID: PMC7763725 DOI: 10.1161/jaha.120.018004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background Alterations in serum creatinine levels delay the identification of severe cardiac surgery-associated acute kidney injury. To provide timely diagnosis, novel predictive tools should be investigated. Methods and Results This prospective observational study consists of a screening cohort (n=204) and a validation cohort (n=198) from 2 centers from our hospital. Thirty-two inflammatory cytokines were measured via a multiplex cytokine assay. Least absolute shrinkage and selection operator regression was conducted to select the cytokine signatures of severe cardiac surgery-associated acute kidney injury. Afterwards, the significant candidates including interferon-γ, interleukin-16, and MIP-1α (macrophage inflammatory protein-1 alpha) were integrated into the logistic regression model to construct a predictive model. The predictive accuracy of the model was evaluated in these 2 cohorts. The cytokine-based model yielded decent performance in both the screening (C-statistic: 0.87, Brier 0.10) and validation cohorts (C-statistic: 0.86, Brier 0.11). Decision curve analysis revealed that the cytokine-based model had a superior net benefit over both the clinical factor-based model and the established plasma biomarker-based model for predicting severe acute kidney injury. In addition, elevated concentrations of each cytokine were associated with longer mechanical ventilation times, intensive care unit stays, and hospital stays. They strongly predicted the risk of composite events (defined as treatment with renal replacement therapy and/or in-hospital death) (OR of the fourth versus the first quartile [95% CI]: interferon-γ, 27.78 [3.61-213.84], interleukin-16, 38.07 [4.98-291.07], and MIP-1α, 9.13 [2.84-29.33]). Conclusions Our study developed and validated a promising blood cytokine-based model for predicting severe acute kidney injury after cardiac surgery and identified prognostic biomarkers for assisting in outcome risk stratification.
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Affiliation(s)
- Zhongli Chen
- Department of Vascular & Cardiology Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai China
| | - Liang Chen
- Department of Cardiac Surgery State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
| | - Guangyu Yao
- Department of Thoracic Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Wenbo Yang
- Department of Vascular & Cardiology Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai China
| | - Ke Yang
- Department of Vascular & Cardiology Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai China
| | - Chenglong Xiong
- Department of Epidemiology School of Public Health Fudan University Shanghai China.,Fudan University Shanghai China
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Fan C, Chen Q, Ren J, Yang X, Ru J, Zhang H, Yang X. Notoginsenoside R1 Suppresses Inflammatory Signaling and Rescues Renal Ischemia-Reperfusion Injury in Experimental Rats. Med Sci Monit 2020; 26:e920442. [PMID: 32198879 PMCID: PMC7111146 DOI: 10.12659/msm.920442] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Background Notoginsenoside R1 (NR) is a major dynamic constituent of Panax notoginseng found to possess anti-inflammatory activity against various inflammatory diseases. However, its protective effects against renal ischemia-reperfusion (I/R) injury have not been elucidated. In male Wistar rats, we induced I/R under general anesthesia by occluding the renal artery for 60 min, followed by reperfusion and right nephrectomy. Material/Methods Rats were randomized to 4 groups: a sham group, an I/R group, an NR-pretreated (50 mg/kg) before I/R induction group, and an NR control group. All animals were killed at 72 h after I/R induction. Blood and renal tissues were collected, and histological and basic renal function parameters were assessed. In addition, levels of various kidney markers and proinflammatory cytokines were measured using RT-PCR, ELISA, and immunohistochemistry analysis. Results After I/R induction, the onset of renal dysfunction was shown by the elevated levels of serum urea, creatinine levels, and histological evaluation, showing a 2-fold increase in the renal failure markers kim-1 and NGAL compared to control rats. Rats pretreated with NR before I/R induction had significantly better renal functions, with attenuated levels of oxidative markers, restored levels of inflammatory cytokines such as tumor necrosis factor-α (TNF-α), tumor growth factor-β1 (TGF-β1), INF-γ, and IL-6, and increased anti-inflammatory cytokine levels (IL-10) compared to I/R-induced rats. Conclusions NR suppressed I/R-induced inflammatory cytokines production by suppressing oxidative stress and kidney markers, suggesting that NR is a promising drug candidate for prevention, progression, and treatment of renal dysfunction.
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Affiliation(s)
- Chuming Fan
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Qingning Chen
- Department of Dermatology, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Jingyu Ren
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Xiaohua Yang
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Jin Ru
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Hongbo Zhang
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
| | - Xinyue Yang
- Department of Critical Care Medicine, First People's Hospital of Yunnan Province, Kunming, Yunnan, China (mainland)
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10
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Zhao L, Han F, Wang J, Chen J. Current understanding of the administration of mesenchymal stem cells in acute kidney injury to chronic kidney disease transition: a review with a focus on preclinical models. Stem Cell Res Ther 2019; 10:385. [PMID: 31843011 PMCID: PMC6916462 DOI: 10.1186/s13287-019-1507-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 11/03/2019] [Accepted: 11/22/2019] [Indexed: 12/11/2022] Open
Abstract
Incomplete recovery from acute kidney injury (AKI) can result in long-term functional deficits and has been recognized as a major contributor to chronic kidney disease (CKD), which is termed the AKI-CKD transition. Currently, an effective intervention for this disorder is still lacking. Principally, therapeutic strategies targeting the AKI-CKD transition can be divided into those reducing the severity of AKI or promoting the regenerative process towards beneficially adaptive repair pathways. Considering the fact that mesenchymal stem cells (MSCs) have the potential to address both aspects, therapeutic regimens based on MSCs have a promising future. In light of this information, we focus on the currently available evidence associated with MSC therapy involved in the treatment of the AKI-CKD transition and the underlying mechanisms. All of these discussions will contribute to the establishment of a reliable therapeutic strategy for patients with this problem, who can be easily ignored by physicians, and will lead to a better clinical outcome for them.
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Affiliation(s)
- Lingfei Zhao
- Kidney Disease Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province, Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China
| | - Fei Han
- Kidney Disease Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province, Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China
| | - Junni Wang
- Kidney Disease Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province, Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China
| | - Jianghua Chen
- Kidney Disease Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China. .,Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province, Institute of Nephrology, Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China.
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11
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How Acute Kidney Injury Contributes to Renal Fibrosis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1165:117-142. [PMID: 31399964 DOI: 10.1007/978-981-13-8871-2_7] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Acute kidney injury (AKI) is a widespread clinical syndrome directly associated with patient short-term and long-term morbidity and mortality. During the last decade, the incidence rate of AKI has been increasing, the repeated and severe episodes of AKI have been recognized as a major risk factor chronic kidney diseases (CKD) and end-stage kidney disease (ESRD) leading to global disease burden. Proposed pathological processes and risk factors that add to the transition of AKI to CKD and ESRD include severity and frequency of kidney injury, older age, gender, genetics and chronic health conditions like diabetes, hypertension, and obesity. Therefore, there is a great interest in learning about the mechanism of AKI leading to renal fibrosis, the ultimate renal lesions of CKD. Over the last several years, a significant attention has been given to the field of renal fibrosis with impressive progression in knowing the mechanism of renal fibrosis to detailed cellular characterization and molecular pathways implicated in tubulointerstitial fibrosis. Research and clinical trial are underway for emerging biomarkers detecting early kidney injury, predicting kidney disease progression and developing strategies to efficiently treat AKI and to minimize AKI progression to CKD and ESRD. Specific interventions to prevent renal fibrosis are still experimental. Potential therapeutic advances based on those molecular mechanisms will hopefully offer promising insights into the development of new therapeutic interventions for patients in the near future.
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12
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Baban B, Marchetti C, Khodadadi H, Malik A, Emami G, Lin PC, Arbab AS, Riccardi C, Mozaffari MS. Glucocorticoid-Induced Leucine Zipper Promotes Neutrophil and T-Cell Polarization with Protective Effects in Acute Kidney Injury. J Pharmacol Exp Ther 2018; 367:483-493. [PMID: 30301736 DOI: 10.1124/jpet.118.251371] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 10/01/2018] [Indexed: 12/11/2022] Open
Abstract
The glucocorticoid-induced leucine zipper (GILZ) mediates anti-inflammatory effects of glucocorticoids. Acute kidney injury (AKI) mobilizes immune/inflammatory mechanisms, causing tissue injury, but the impact of GILZ in AKI is not known. Neutrophils play context-specific proinflammatory [type 1 neutrophil (N1)] and anti-inflammatory [type 2 neutrophil (N2)] functional roles. Also, regulatory T lymphocytes (Tregs) and regulatory T-17 (Treg17) cells exert counterinflammatory effects, including the suppression of effector T lymphocytes [e.g., T-helper (Th) 17 cells]. Thus, utilizing cell preparations of mice kidneys subjected to AKI or sham operation, we determined the effects of GILZ on T cells and neutrophil subtypes in the context of its renoprotective effect; these studies used the transactivator of transcription (TAT)-GILZ or the TAT peptide. AKI increased N1 and Th-17 cells but reduced N2, Tregs, and Treg17 cells in association with increased interleukin (IL)-17+ but reduced IL-10+ cells accompanied with the disruption of mitochondrial membrane potential (ψ m) and increased apoptosis/necrosis compared with sham kidneys. TAT-GILZ, compared with TAT, treatment reduced N1 and Th-17 cells but increased N2 and Tregs, without affecting Treg17 cells, in association with a reduction in IL-17+ cells but an increase in IL-10+ cells; TAT-GILZ caused less disruption of ψ m and reduced cell death in AKI. Importantly, TAT-GILZ increased perfusion of the ischemic-reperfused kidney but reduced tissue edema compared with TAT. Utilizing splenic T cells and bone marrow-derived neutrophils, we further showed marked reduction in the proliferation of Th cells in response to TAT-GILZ compared with response to TAT. Collectively, the results indicate that GILZ exerts renoprotection accompanied by the upregulation of the regulatory/suppressive arm of immunity in AKI, likely via regulating cross talk between T cells and neutrophils.
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Affiliation(s)
- Babak Baban
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Cristina Marchetti
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Hesam Khodadadi
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Aneeq Malik
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Golnaz Emami
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Ping-Chang Lin
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Ali S Arbab
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Carlo Riccardi
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
| | - Mahmood S Mozaffari
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia (B.B., H.K., A.M., G.E., M.S.M.) and Georgia Cancer Center (P.-C.L., A.S.A.), Augusta University, Augusta, Georgia; and Department of Medicine, University of Perugia, Perugia, Italy (C.M., C.R.)
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13
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A review of the role of immune cells in acute kidney injury. Pediatr Nephrol 2018; 33:1629-1639. [PMID: 28801723 DOI: 10.1007/s00467-017-3774-5] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/30/2017] [Accepted: 07/20/2017] [Indexed: 01/08/2023]
Abstract
Acute kidney injury (AKI) is a systemic disease occurring commonly in patients who are critically ill. Etiologies of AKI can be septic or aseptic (nephrotoxic, or ischemia-reperfusion injury). Recent evidence reveals that innate and adaptive immune responses are involved in mediating damage to renal tubular cells and in recovery from AKI. Dendritic cells, monocytes/macrophages, neutrophils, T lymphocytes, and B lymphocytes all contribute to kidney injury. Conversely, M2 macrophages and regulatory T cells are essential in suppressing inflammation, tissue remodeling and repair following kidney injury. AKI itself confers an increased risk for developing infection owing to increased production and decreased clearance of cytokines, in addition to dysfunction of immune cells themselves. Neutrophils are the predominant cell type rendered dysfunctional by AKI. In this review, we describe the bi-directional interplay between the immune system and AKI and summarize recent developments in this field of research.
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14
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Liu BC, Tang TT, Lv LL, Lan HY. Renal tubule injury: a driving force toward chronic kidney disease. Kidney Int 2018; 93:568-579. [DOI: 10.1016/j.kint.2017.09.033] [Citation(s) in RCA: 260] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/17/2017] [Accepted: 09/06/2017] [Indexed: 12/13/2022]
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15
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Lee JS. Immunologic Mechanism of Ischemia Reperfusion Injury in Transplantation. KOREAN JOURNAL OF TRANSPLANTATION 2017. [DOI: 10.4285/jkstn.2017.31.3.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Jong Soo Lee
- Division of Nephrology, Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
- Biomedical Research Center, Ulsan, Korea
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16
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Hall G, Cullen E, Sawmynaden K, Arnold J, Fox S, Cowan R, Muskett FW, Matthews D, Merritt A, Kettleborough C, Cruikshank W, Taylor D, Bayliss R, Carr MD. Structure of a Potential Therapeutic Antibody Bound to Interleukin-16 (IL-16): MECHANISTIC INSIGHTS AND NEW THERAPEUTIC OPPORTUNITIES. J Biol Chem 2016; 291:16840-8. [PMID: 27231345 DOI: 10.1074/jbc.m115.709303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Indexed: 01/19/2023] Open
Abstract
Interleukin-16 (IL-16) is reported to be a chemoattractant cytokine and modulator of T-cell activation, and has been proposed as a ligand for the co-receptor CD4. The secreted active form of IL-16 has been detected at sites of TH1-mediated inflammation, such as those seen in autoimmune diseases, ischemic reperfusion injury (IRI), and tissue transplant rejection. Neutralization of IL-16 recruitment to its receptor, using an anti-IL16 antibody, has been shown to significantly attenuate inflammation and disease pathology in IRI, as well as in some autoimmune diseases. The 14.1 antibody is a monoclonal anti-IL-16 antibody, which when incubated with CD4(+) cells is reported to cause a reduction in the TH1-type inflammatory response. Secreted IL-16 contains a characteristic PDZ domain. PDZ domains are typically characterized by a defined globular structure, along with a peptide-binding site located in a groove between the αB and βB structural elements and a highly conserved carboxylate-binding loop. In contrast to other reported PDZ domains, the solution structure previously reported for IL-16 reveals a tryptophan residue obscuring the recognition groove. We have solved the structure of the 14.1Fab fragment in complex with IL-16, revealing that binding of the antibody requires a conformational change in the IL-16 PDZ domain. This involves the rotation of the αB-helix, accompanied movement of the peptide groove obscuring tryptophan residue, and consequent opening up of the binding site for interaction. Our study reveals a surprising mechanism of action for the antibody and identifies new opportunities for the development of IL-16-targeted therapeutics, including small molecules that mimic the interaction of the antibody.
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Affiliation(s)
- Gareth Hall
- From the Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester, Leicester, LE1 9HN, United Kingdom,
| | - Eilish Cullen
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Kovilen Sawmynaden
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Joanne Arnold
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Simon Fox
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Richard Cowan
- From the Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester, Leicester, LE1 9HN, United Kingdom
| | - Frederick W Muskett
- From the Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester, Leicester, LE1 9HN, United Kingdom
| | - David Matthews
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Andrew Merritt
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Catherine Kettleborough
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | | | - Debra Taylor
- MRC Technology, Centre for Therapeutics Discovery, 1-3 Burtonhole Lane, Mill Hill, London NW7 1AD, United Kingdom, and
| | - Richard Bayliss
- From the Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester, Leicester, LE1 9HN, United Kingdom
| | - Mark D Carr
- From the Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester, Leicester, LE1 9HN, United Kingdom,
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17
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Jang HR, Park JH, Kwon GY, Park JB, Lee JE, Kim DJ, Kim YG, Kim SJ, Oh HY, Huh W. Aging has small effects on initial ischemic acute kidney injury development despite changing intrarenal immunologic micromilieu in mice. Am J Physiol Renal Physiol 2016; 310:F272-83. [DOI: 10.1152/ajprenal.00217.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 12/08/2015] [Indexed: 12/20/2022] Open
Abstract
Inflammatory process mediated by innate and adaptive immune systems is a major pathogenic mechanism of renal ischemia-reperfusion injury (IRI). There are concerns that organ recipients may be at increased risk of developing IRI after receiving kidneys from elder donors. To reveal the effects of aging on the development of renal IRI, we compared the immunologic micromilieu of normal and postischemic kidneys from mice of three different ages (9 wk, 6 mo, and 12 mo). There was a higher number of total T cells, especially effector memory CD4/CD8 T cells, and regulatory T cells in the normal kidneys of old mice. On day 2 after IRI, the proportion of necrotic tubules and renal functional changes were comparable between groups although old mice had a higher proportion of damaged tubule compared with young mice. More T cells, but less B cells, trafficked into the postischemic kidneys of old mice. The infiltration of NK T cells was similar across the groups. Macrophages and neutrophils were comparable between groups in both normal kidneys and postischemic kidneys. The intrarenal expressions of TNF-α and VEGF were decreased in normal and postischemic kidneys of aged mice. These mixed effects of aging on lymphocytes and cytokines/chemokines were not different between the two groups of old mice. Our study demonstrates that aging alters the intrarenal micromilieu but has small effects on the development of initial renal injury after IRI. Further study investigating aging-dependent differences in the repair process of renal IRI may be required.
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Affiliation(s)
- Hye Ryoun Jang
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Ji Hyeon Park
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Ghee Young Kwon
- Department of Pathology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jae Berm Park
- Department of Surgery, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea; and
| | - Jung Eun Lee
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dae Joong Kim
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yoon-Goo Kim
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung Joo Kim
- Department of Surgery, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea; and
| | - Ha Young Oh
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Wooseong Huh
- Nephrology Division, Department of Medicine, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Clinical Pharmacology and Therapeutics, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
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18
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Pawlus J, Sierocka A, Tejchman K, Ziętek Z, Romanowski M, Pawlik A, Sieńko J, Żukowski M, Ciechanowski K, Ostrowski M, Sulikowski T. The impact of interleukin 12B (1188A>C), interleukin 16 (-295T>C), and interleukin 18 (607C>A, 137G>C) gene polymorphisms on long-term renal transplant function and recipient outcomes. Transplant Proc 2015; 46:2079-82. [PMID: 25131111 DOI: 10.1016/j.transproceed.2014.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Inflammatory mediators play an important role in kidney graft outcome. The cytokine and chemokine gene polymorphisms are associated with variable production, activity, expression, or ligand-receptor affinity. Genetic variation in the DNA sequence of the interleukin 12B (IL12B), interleukin 16 (IL16), and interleukin 18 (IL18) genes may lead to altered cytokine production and activity. These variations can lead to changes in individual patient outcomes after kidney transplantation. It is known that polymorphisms of interleukins have an influence on inflammatory diseases, eg, Crohn's disease, diabetes, and asthma. AIM The aim of this study was to evaluate the correlation between IL12B, IL16, and IL18 gene polymorphisms with delayed graft function (DGF), acute rejection episodes (AR), and chronic rejection episodes (CR). MATERIALS AND METHODS A total of 267 (38.6% women, 61.4% men) recipients were included in the study. Cadaveric kidney transplantations were performed at the Department of General Surgery and Transplantation. Polymerase chain reaction was used to determine gene polymorphisms of IL12B (rs3212227), IL16 (4778889), and IL18 (rs1946518, rs187238) in 2 mL of serum. Statistical significance (P < .05) was analyzed by logit regression, ANOVA and odds ratio (OR) of χ(2) with Yates correction (95% confidence interval). RESULTS Regression analysis revealed no significance between AR/DGF/CR and IL-2B, IL16, IL18rs1946518, and IL18-rs187238 (P > .05). The CR group, AA vs CC genotype of IL18 (rs1946518), had an OR = 2.35 (P = .04). AR and DGF groups had no significance in OR. CONCLUSIONS There was no statistical significance between IL12B, IL16, and IL18 (rs187238) gene polymorphisms and kidney graft outcome after transplantation. Presence of AA genotype (IL18-rs1946518) is connected with a 2.35 times higher risk of CR occurrence.
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Affiliation(s)
- J Pawlus
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - A Sierocka
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - K Tejchman
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - Z Ziętek
- Department of Anatomy, Pomeranian Medical University, Szczecin, Poland
| | - M Romanowski
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - A Pawlik
- Department of Pharmacokinetics and drugs Monitoring, Pomeranian Medical University, Szczecin, Poland
| | - J Sieńko
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - M Żukowski
- Department of Anesthesiology and Intensive Care, Pomeranian Medical University, Szczecin, Poland
| | - K Ciechanowski
- Department of Nephrology, Transplantology and Internal Diseases, Pomeranian Medical University, Szczecin, Poland
| | - M Ostrowski
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
| | - T Sulikowski
- Department of General Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland.
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Abstract
Acute kidney injury (AKI) prolongs hospital stay and increases mortality in various clinical settings. Ischaemia-reperfusion injury (IRI), nephrotoxic agents and infection leading to sepsis are among the major causes of AKI. Inflammatory responses substantially contribute to the overall renal damage in AKI. Both innate and adaptive immune systems are involved in the inflammatory process occurring in post-ischaemic AKI. Proinflammatory damage-associated molecular patterns, hypoxia-inducible factors, adhesion molecules, dysfunction of the renal vascular endothelium, chemokines, cytokines and Toll-like receptors are involved in the activation and recruitment of immune cells into injured kidneys. Immune cells of both the innate and adaptive immune systems, such as neutrophils, dendritic cells, macrophages and lymphocytes contribute to the pathogenesis of renal injury after IRI, and some of their subpopulations also participate in the repair process. These immune cells are also involved in the pathogenesis of nephrotoxic AKI. Experimental studies of immune cells in AKI have resulted in improved understanding of the immune mechanisms underlying AKI and will be the foundation for development of novel diagnostic and therapeutic targets. This Review describes what is currently known about the function of the immune system in the pathogenesis and repair of ischaemic and nephrotoxic AKI.
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Affiliation(s)
- Hye Ryoun Jang
- Nephrology Division, Department of Medicine, Samsung Medical Centre, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 81 Irwon-Ro Gangnam-gu, Seoul 135-710, South Korea
| | - Hamid Rabb
- Nephrology Division, Department of Medicine, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205, USA
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20
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Expression of acute phase proteins and inflammatory cytokines in mouse mammary gland followingStaphylococcus aureuschallenge and in response to milk accumulation. J DAIRY RES 2014; 81:445-54. [DOI: 10.1017/s0022029914000454] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We used a mouse model of pathogenic (Staphylococcus aureus) and non-pathogenic (teat sealing) mammary inflammation to investigate mRNA expression of several inflammatory cytokines and acute phase proteins (APP) in mammary tissue and liver, and the appearance of some of these factors in plasma and milk. The expression levels of IL1β and TNFα were markedly up-regulated inStaph. aureus-inoculated mammary tissue at 72 h, whilst IL6 was up-regulated to a lesser extent in a way which was not confined to the inoculated glands. APP expression was up-regulated at 48 and 72 h in bothStaph. aureus-inoculated and teat-sealedmammaryglands. These differences between cytokine and APP expression provide additional support for the contention that APPs are produced within the mammary tissue itself during inflammation, rather than in associated immune cells. We propose that measurement of cytokines and APP in combination might provide a tool for diagnostic discrimination between mastitis caused by pathogenic invasion and milk accumulation, and hence allow for better targeting of antibiotic therapy. In comparison with mammary expression, expression of cytokines in liver tissue was up-regulated to a similar or lesser extent, whilst expression of APP was up-regulated to a much greater extent. The first appearance of increased cytokine and APP concentrations in plasma and of milk amyloid A (MAA) in milk occurred in advance of the measurable up-regulation of expression, hence their origin cannot be stated with certainty.
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Xu X, Kriegel AJ, Jiao X, Liu H, Bai X, Olson J, Liang M, Ding X. miR-21 in ischemia/reperfusion injury: a double-edged sword? Physiol Genomics 2014; 46:789-97. [PMID: 25159851 DOI: 10.1152/physiolgenomics.00020.2014] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
MicroRNAs (miRNAs or miRs) are endogenous, small RNA molecules that suppress expression of targeted mRNA. miR-21, one of the most extensively studied miRNAs, is importantly involved in divergent pathophysiological processes relating to ischemia/reperfusion (I/R) injury, such as inflammation and angiogenesis. The role of miR-21 in renal I/R is complex, with both protective and pathological pathways being regulated by miR-21. Preconditioning-induced upregulation of miR-21 contributes to the protection against subsequent renal I/R injury through the targeting of genes such as the proapoptotic gene programmed cell death 4 and interactions between miR-21 and hypoxia-inducible factor. Conversely, long-term elevation of miR-21 may be detrimental to the organ by promoting the development of renal interstitial fibrosis following I/R injury. miR-21 is importantly involved in several pathophysiological processes related to I/R injury including inflammation and angiogenesis as well as the biology of stem cells that could be used to treat I/R injury; however, the effect of miR-21 on these processes in renal I/R injury remains to be studied.
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Affiliation(s)
- Xialian Xu
- Division of Nephrology, Fudan University Zhongshan Hospital, Shanghai, Peoples Republic of China
| | - Alison J Kriegel
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Xiaoyan Jiao
- Division of Nephrology, Fudan University Zhongshan Hospital, Shanghai, Peoples Republic of China
| | - Hong Liu
- Division of Nephrology, Fudan University Zhongshan Hospital, Shanghai, Peoples Republic of China
| | - Xiaowen Bai
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jessica Olson
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Xiaoqiang Ding
- Division of Nephrology, Fudan University Zhongshan Hospital, Shanghai, Peoples Republic of China; Institutes of Biomedical Sciences of Shanghai Medical School, Fudan University, Shanghai, Peoples Republic of China; Kidney and Dialysis Institute of Shanghai, Shanghai, Peoples Republic of China; and Kidney and Blood Purification Laboratory of Shanghai, Shanghai, Peoples Republic of China
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22
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Zhao J, Bolton EM, Randle L, Bradley JA, Lever AML. Functional characterization of late outgrowth endothelial progenitor cells in patients with end-stage renal failure. Transpl Int 2014; 27:437-51. [PMID: 24471420 PMCID: PMC4229358 DOI: 10.1111/tri.12277] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/07/2013] [Accepted: 01/23/2014] [Indexed: 12/31/2022]
Abstract
Renal transplantation is potentially curative in renal failure, but long-term efficacy is limited by untreatable chronic rejection. Endothelial damage contributes to chronic rejection and is potentially repairable by circulating endothelial progenitor cells (EPC). The frequency and function of EPC are variably influenced by end-stage renal failure (ESRF). Here, we isolated and functionally characterized the late outgrowth EPC (LO-EPC) from ESRF patients to investigate their potential for endothelial repair. Patients with ESRF generated more LO-EPC colonies than healthy controls and had higher plasma levels of IL-1rα, IL-16, IL-6, MIF, VEGF, Prolactin, and PLGF. Patients' LO-EPC displayed normal endothelial cell morphology, increased secretion of PLGF, MCP-1, and IL-1β, and normal network formation in vitro and in vivo. They demonstrated decreased adhesion to extracellular matrix. Integrin gene profiles and protein expression were comparable in patients and healthy volunteers. In some patients, mesenchymal stem cells (MSC) were co-isolated and could be differentiated into adipocytes and osteocytes in vitro. This is the first study to characterize LO-EPC from patients with ESRF. Their behavior in vitro reflects the presence of elevated trophic factors; their ability to proliferate in vitro and angiogenic function makes them candidates for prevention of chronic rejection. Their impaired adhesion and the presence of MSC are areas for potential therapeutic intervention.
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Affiliation(s)
- Jing Zhao
- Department of Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
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23
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Kimura N, Itoh S, Nakae S, Axtell RC, Velotta JB, Bos EJ, Merk DR, Gong Y, Okamura H, Nagamine CM, Adachi H, Kornfeld H, Robbins RC, Fischbein MP. Interleukin-16 deficiency suppresses the development of chronic rejection in murine cardiac transplantation model. J Heart Lung Transplant 2012; 30:1409-17. [PMID: 22055099 DOI: 10.1016/j.healun.2011.08.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 07/24/2011] [Accepted: 08/25/2011] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND IL-16 promotes the recruitment of various cells expressing CD4, a receptor for IL-16. The precise role of IL-16 in transplant rejection remains unknown; therefore, the present study investigated the contribution of IL-16 to the development of chronic rejection in heart transplants. METHODS C-H-2(bm12)KhEg (H-2(bm12)) donor hearts were transplanted into (1) IL-16-deficient (IL-16(-/-)) C57BL/6J or (b) wild type (WT) control recipients (MHC class II mismatch). Grafts were harvested at 52 days, parenchymal rejection was assessed by the ISHLT grading system, and CAV was examined morphometrically. Graft infiltrating cells were detected 10 and 52 days after transplantation. Intragraft cytokine and chemokine profiles were assessed. To confirm the role of IL-16 in CAV development, C-H-2(bm12)KhEg (H-2(bm12)) donor hearts were transplanted into C57BL/6J WT recipients treated with (1) anti-IL-16-neutralization monoclonal antibody or (b) control immunoglobulin G. Grafts were harvested at 52 days, and CAV was quantified morphometrically. Graft-infiltrating cells were examined histologically. RESULTS Parenchymal rejection and CAV was significantly attenuated in donor hearts transplanted into IL-16(-/-) recipient mice compared with WT controls. Donor hearts transplanted into IL-16(-/-) recipients had a significant reduction in coronary artery luminal occlusion, intima-to-media ratio, and percentage of diseased vessels. CAV was associated with decreased donor organ inflammation, as well as donor organ cytokine (IL-1β and IL-6) and chemokine (MCP-1 and KC) protein expression. Intimal proliferation and inflammatory cell infiltration were significantly reduced in hearts transplanted into recipients treated with an IL-16-neutralization antibody. CONCLUSIONS IL-16-deficiency reduced graft inflammatory cell recruitment, and allograft inflammatory cytokine and chemokine production. Therefore, IL-16 neutralization may provide a potential target for novel therapeutic treatment for cardiac allograft rejection.
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Affiliation(s)
- Naoyuki Kimura
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, California 94305, USA
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24
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Keseroğlu K, Banoğlu E, Kizil Y, Aydil U, Gönül II, Yilmaz M, Ceylan A. Serum interleukin-16 levels in patients with nasal polyposis. Laryngoscope 2012; 122:961-4. [PMID: 22447494 DOI: 10.1002/lary.23238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 11/15/2011] [Accepted: 01/17/2012] [Indexed: 11/07/2022]
Abstract
OBJECTIVE/HYPOTHESIS Several inflammatory and allergic disorders have been reported to correlate with interleukin-16 (IL-16). IL-16 is a highly potent chemotactic and chemoattractant molecule for eosinophils. Nasal polyposis (NP) has an inflammatory basis, and eosinophilia is a common finding in polyp tissue. In this study, we aimed to determine serum IL-16 levels in NP patients. STUDY DESIGN Prospective controlled study in a tertiary academic hospital. METHODS Peripheral blood samples were obtained and used for serologic studies with enzyme-linked immunosorbent assay kits to determine IL-16 levels. RESULTS The study and the control groups consisted of 17 and 10 patients, respectively. Mean serum IL-16 levels were significantly higher in the study group when compared to the control group (447.9 pg/mL vs. 260.2 pg/mL) (P < .001). CONCLUSIONS Serum IL-16 levels are significantly elevated in NP patients. This finding may represent identification of a valuable serum biomarker and potential therapeutic target in NP patients.
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Affiliation(s)
- Kemal Keseroğlu
- Department of Otorhinolaryngology, Gazi University School of Medicine, Ankara, Turkey
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25
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Ko GJ, Linfert D, Jang HR, Higbee E, Watkins T, Cheadle C, Liu M, Racusen L, Grigoryev DN, Rabb H. Transcriptional analysis of infiltrating T cells in kidney ischemia-reperfusion injury reveals a pathophysiological role for CCR5. Am J Physiol Renal Physiol 2011; 302:F762-73. [PMID: 22160774 DOI: 10.1152/ajprenal.00335.2011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Although T cells have been shown to play a direct role in kidney ischemia-reperfusion injury (IRI), little is known about the underlying mechanisms. We hypothesized that studying the transcriptional responses in kidney-infiltrating T cells would help elucidate novel therapeutic targets for kidney IRI. Unilateral renal pedicle clamping for 45 min was performed in male C57BL/6 mice, and CD3(+) T cells were isolated from the kidney and purified. Transcriptional activities of T cell were measured by array-based PCR compared between ischemic kidneys and contralateral nonischemic kidneys. Among total of 89 genes analyzed, 24, 22, 24, and 37 genes were significantly changed at 6 h, day 3, day 10, and day 28 after IRI. Genes associated with cytokines, chemokines, and costimulatory molecules were upregulated. Pathway analysis identified CC motif chemokine receptor 5 (CCR5) as a candidate pathophysiological pathway. CCR5 upregulation was validated at the protein level, and CCR5 blockade improved renal function after kidney IRI. Using discovery techniques to identify transcriptional responses in purified kidney-infiltrating cells enabled the elucidation of novel mechanisms and therapeutic targets for IRI.
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Affiliation(s)
- Gang Jee Ko
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Ross Bldg., Rm. 965, 720 Rutland Ave., Baltimore, MD 21205, USA
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26
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Immunopathogenesis of ischemia/reperfusion-associated tissue damage. Clin Immunol 2011; 141:3-14. [PMID: 21839685 DOI: 10.1016/j.clim.2011.07.001] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Accepted: 07/07/2011] [Indexed: 02/08/2023]
Abstract
Ischemia/reperfusion (IR) instigates a complex array of inflammatory events which result in damage to the local tissue. IR-related organ damage occurs invariably in several clinical conditions including trauma, organ transplantation, autoimmune diseases and revascularization procedures. We critically review available pre-clinical experimental information on the role of immune response in the expression of tissue damage following IR. Distinct elements of the innate and adaptive immune response are involved in the expression of tissue injury. Interventions such as prevention of binding of natural antibody to antigen expressed on the surface of ischemia-conditioned cells, inhibition of the ensuing complement activation, modulation of Toll-like receptors, B or T cell depletion and blockade of inflammatory cytokines and chemokines limit IR injury in preclinical studies. Clinical trials that will determine the therapeutic value of each approach is needed.
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27
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de Vries DK, Lindeman JHN, Ringers J, Reinders MEJ, Rabelink TJ, Schaapherder AFM. Donor brain death predisposes human kidney grafts to a proinflammatory reaction after transplantation. Am J Transplant 2011; 11:1064-70. [PMID: 21449948 DOI: 10.1111/j.1600-6143.2011.03466.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Donor brain death has profound effects on post-transplantation graft function and survival. We hypothesized that changes initiated in the donor influence the graft's response to ischemia and reperfusion. In this study, human brain dead donor kidney grafts were compared to living and cardiac dead donor kidney grafts. Pretransplant biopsies of brain dead donor kidneys contained notably more infiltrating T lymphocytes and macrophages. To assess whether the different donor conditions result in a different response to reperfusion, local cytokine release from the reperfused kidney was studied by measurement of paired arterial and renal venous blood samples. Reperfusion of kidneys from brain dead donors was associated with the instantaneous release of inflammatory cytokines, such as G-CSF, IL-6, IL-9, IL-16 and MCP-1. In contrast, kidneys from living and cardiac dead donors showed a more modest cytokine response with release of IL-6 and small amounts of MCP-1. In conclusion, this study shows that donor brain death initiates an inflammatory state of the graft with T lymphocyte and macrophage infiltration and massive inflammatory cytokine release upon reperfusion. These observations suggest that brain dead donors require a novel approach for donor pretreatment aimed at preventing this inflammatory response to increase graft survival.
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Affiliation(s)
- D K de Vries
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.
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28
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Szakaly P, Laszlo E, Kovacs K, Racz B, Horvath G, Ferencz A, Lubics A, Kiss P, Tamas A, Brubel R, Opper B, Baba A, Hashimoto H, Farkas J, Matkovits A, Magyarlaki T, Helyes Z, Reglodi D. Mice deficient in pituitary adenylate cyclase activating polypeptide (PACAP) show increased susceptibility to in vivo renal ischemia/reperfusion injury. Neuropeptides 2011; 45:113-21. [PMID: 21211837 DOI: 10.1016/j.npep.2010.12.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 11/12/2010] [Accepted: 12/07/2010] [Indexed: 11/29/2022]
Abstract
Pituitary adenylate cyclase activating polypeptide (PACAP) is a neuropeptide with well-known cytoprotective effects. We have reported earlier that PACAP decreases mortality and the degree of tubular atrophy in a rat model of renal ischemia/reperfusion injury. Recently, we have shown that kidney cultures isolated from PACAP deficient mice show increased susceptibility to renal oxidative stress. Based on these previous studies, we raised the question whether PACAP deficient mice display increased sensitivity to in vivo kidney ischemia/reperfusion. PACAP⁻/⁻ mice underwent 45 or 60 min of renal ischemia followed by 2 weeks reperfusion. Kidneys were processed for histological analysis. Sections stained with PAS-haematoxylin were graded for the following parameters: degree of tubular dilation, Bowmann's capsule dilation, lymphocyte and macrophage infiltration, thyroidization and the disappearance of the PAS-positive glycocalyx from under the brush border. In other sets of experiments, tissue cytokine expression and the level of the endogenous antioxidant superoxide dismutase (SOD) were also determined after 60 min ischemia/reperfusion. Our results show that while intact kidneys were not different between wild-type and PACAP deficient mice, marked differences were observed in the histological structures in groups that underwent ischemia/reperfusion. PACAP deficient mice had a worse histological outcome, with significantly higher histological scores for all tested parameters. Cytokine expression was also markedly different between wild-type and PACAP deficient mice. In addition, the level of SOD was significantly lower in PACAP⁻/⁻ animals after ischemia/reperfusion. In conclusion, the lack of endogenous PACAP leads to higher susceptibility to in vivo renal ischemia/reperfusion, suggesting that PACAP has an endogenous renoprotective effect.
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29
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Jurewicz M, Ueno T, Azzi J, Tanaka K, Murayama T, Yang S, Sayegh MH, Niimi M, Abdi R. Donor antioxidant strategy prolongs cardiac allograft survival by attenuating tissue dendritic cell immunogenicity(†). Am J Transplant 2011; 11:348-55. [PMID: 21182586 DOI: 10.1111/j.1600-6143.2010.03360.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ischemic reperfusion injury (IRI) enhances allograft immunogenicity, worsens transplantation outcome, and is the primary cause of activation of the recipient innate immune response, resulting in subsequent amplification of the alloimmune adaptive response. Here, we aimed at demonstrating that the link between innate injury and alloimmunity occurs predominantly through activation of allograft-derived dendritic cells (ADDC). Perfusion of MCI-186, a free radical scavenger, into donor cardiac allografts prior to transplantation resulted in prolongation of complete MHC-mismatched allograft survival in the absence of immunosuppression (MST of 8 vs. 26 days). This prolongation was associated with a reduction in trafficking of ADDC to recipient lymphoid tissue as well as a reduction in T cell priming. Depleting ADDC with diphtheria toxin (using DTR-GFP-DC mice as donors) 24 h prior to transplant resulted in abrogation of the prolongation observed with MCI-186 treatment, demonstrating that the beneficial effect of MCI-186 is mediated by ADDC. This donor-specific anti-ischemic regimen was also shown to reduce chronic rejection, which represents the primary obstacle to long-term allograft acceptance. These data for the first time establish a basis for donor anti-ischemic strategies, which in the ever-expanding marginal donor pools, can be instituted to promote engraftment.
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Affiliation(s)
- M Jurewicz
- Transplantation Research Center, Brigham and Women's Hospital and Children's Hospital, Boston, MA, USA
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30
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Hotta K, Sho M, Yamato I, Shimada K, Harada H, Akahori T, Nakamura S, Konishi N, Yagita H, Nonomura K, Nakajima Y. Direct targeting of fibroblast growth factor-inducible 14 protein protects against renal ischemia reperfusion injury. Kidney Int 2011; 79:179-88. [DOI: 10.1038/ki.2010.379] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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White LE, Chaudhary R, Moore LJ, Moore FA, Hassoun HT. Surgical sepsis and organ crosstalk: the role of the kidney. J Surg Res 2010; 167:306-15. [PMID: 21324390 DOI: 10.1016/j.jss.2010.11.923] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 11/19/2010] [Accepted: 11/29/2010] [Indexed: 02/06/2023]
Abstract
Acute kidney injury (AKI) is a common complication of hospitalized patients, and clinical outcomes remain poor despite advances in renal replacement therapy. The accepted pathophysiology of AKI in the setting of sepsis has evolved from one of simple decreased renal blood flow to one that involves a more complex interaction of intra-glomerular microcirculatory vasodilation combined with the local release of inflammatory mediators and apoptosis. Evidence from preclinical AKI models suggests that crosstalk occurs between kidneys and other organ systems via soluble and cellular inflammatory mediators and that this involves both the innate and adaptive immune systems. These interactions are reflected by genomic changes and abnormal rates of cellular apoptosis in distant organs including the lungs, heart, gut, liver, and central nervous system. The purpose of this article is to review the influence of AKI, particularly sepsis-associated AKI, on inter-organ crosstalk in the context of systemic inflammation and multiple organ failure (MOF).
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Affiliation(s)
- Laura E White
- Department of Surgery, The Methodist Hospital and Research Institute, Houston Texas, USA
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32
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Wang S, Zhang ZX, Yin Z, Liu W, Garcia B, Huang X, Acott P, Jevnikar AM. Anti-IL-2 receptor antibody decreases cytokine-induced apoptosis of human renal tubular epithelial cells (TEC). Nephrol Dial Transplant 2010; 26:2144-53. [DOI: 10.1093/ndt/gfq714] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Biomarkers for the Diagnosis of the Stable Kidney Transplant and Chronic Transplant Injury Using the ProtoArray® Technology. Transplant Proc 2010; 42:3475-81. [DOI: 10.1016/j.transproceed.2010.09.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 09/07/2010] [Indexed: 12/20/2022]
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34
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Stem Cell Factor, Interleukin-16, and Interleukin-2 Receptor Alpha are Predictive Biomarkers for Delayed and Slow Graft Function. Transplant Proc 2010; 42:3399-405. [DOI: 10.1016/j.transproceed.2010.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 06/01/2010] [Indexed: 11/18/2022]
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35
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Meagher C, Beilke J, Arreaza G, Mi QS, Chen W, Salojin K, Horst N, Cruikshank WW, Delovitch TL. Neutralization of interleukin-16 protects nonobese diabetic mice from autoimmune type 1 diabetes by a CCL4-dependent mechanism. Diabetes 2010; 59:2862-71. [PMID: 20693344 PMCID: PMC2963545 DOI: 10.2337/db09-0131] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The progressive infiltration of pancreatic islets by lymphocytes is mandatory for development of autoimmune type 1 diabetes. This inflammatory process is mediated by several mediators that are potential therapeutic targets to arrest development of type 1 diabetes. In this study, we investigate the role of one of these mediators, interleukin-16 (IL-16), in the pathogenesis of type 1 diabetes in NOD mice. RESEARCH DESIGN AND METHODS At different stages of progression of type 1 diabetes, we characterized IL-16 in islets using GEArray technology and immunoblot analysis and also quantitated IL-16 activity in cell migration assays. IL-16 expression was localized in islets by immunofluorescence and confocal imaging. In vivo neutralization studies were performed to assess the role of IL-16 in the pathogenesis of type 1 diabetes. RESULTS The increased expression of IL-16 in islets correlated with the development of invasive insulitis. IL-16 immunoreactivity was found in islet infiltrating T-cells, B-cells, NK-cells, and dendritic cells, and within an insulitic lesion, IL-16 was derived from infiltrating cells. CD4(+) and CD8(+) T-cells as well as B220(+) B-cells were identified as sources of secreted IL-16. Blockade of IL-16 in vivo protected against type 1 diabetes by interfering with recruitment of CD4(+) T-cells to the pancreas, and this protection required the activity of the chemokine CCL4. CONCLUSIONS IL-16 production by leukocytes in islets augments the severity of insulitis during the onset of type 1 diabetes. IL-16 and CCL4 appear to function as counterregulatory proteins during disease development. Neutralization of IL-16 may represent a novel therapy for the prevention of type 1 diabetes.
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Affiliation(s)
- Craig Meagher
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
| | - Josh Beilke
- Department of Immunology, University of California, San Francisco, California
| | - Guillermo Arreaza
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
| | - Qing-Sheng Mi
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
| | - Wei Chen
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
| | - Konstantin Salojin
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
| | - Noah Horst
- Department of Immunology, University of California, San Francisco, California
| | | | - Terry L. Delovitch
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
- Laboratory of Autoimmune Diabetes, Robarts Research Institute, London, Ontario, Canada
- Corresponding author: Terry L. Delovitch,
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36
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Andersson A, Bossios A, Malmhäll C, Sjöstrand M, Eldh M, Eldh BM, Glader P, Andersson B, Qvarfordt I, Riise GC, Lindén A. Effects of tobacco smoke on IL-16 in CD8+ cells from human airways and blood: a key role for oxygen free radicals? Am J Physiol Lung Cell Mol Physiol 2010; 300:L43-55. [PMID: 21036918 DOI: 10.1152/ajplung.00387.2009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Chronic exposure to tobacco smoke leads to an increase in the frequency of infections and in the number of CD8(+) and CD4(+) cells as well as the CD4(+) chemoattractant cytokine IL-16 in the airways. Here, we investigated whether tobacco smoke depletes intracellular IL-16 protein and inhibits de novo production of IL-16 in CD8(+) cells from human airways and blood while increasing extracellular IL-16 and whether oxygen free radicals (OFR) are involved. Intracellular IL-16 protein in CD8(+) cells and mRNA in all cells was decreased in bronchoalveolar lavage (BAL) samples from chronic smokers. This was also the case in human blood CD8(+) cells exposed to water-soluble tobacco smoke components in vitro, in which oxidized proteins were markedly increased. Extracellular IL-16 protein was increased in cell-free BAL fluid from chronic smokers and in human blood CD8(+) cells exposed to water-soluble tobacco smoke components in vitro. This was not observed in occasional smokers after short-term exposure to tobacco smoke. A marker of activation (CD69) was slightly increased, whereas other markers of key cellular functions (membrane integrity, apoptosis, and proliferation) in human blood CD8(+) cells in vitro were negatively affected by water-soluble tobacco smoke components. An OFR scavenger prevented these effects, whereas a protein synthesis inhibitor, a β-adrenoceptor, a glucocorticoid receptor agonist, a phosphodiesterase, a calcineurin phosphatase, and a caspase-3 inhibitor did not. In conclusion, tobacco smoke depletes preformed intracellular IL-16 protein, inhibits its de novo synthesis, and distorts key cellular functions in human CD8(+) cells. OFR may play a key role in this context.
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Affiliation(s)
- Anders Andersson
- Dept. of Internal Medicine/Respiratory Medicine and Allergology, Univ. of Gothenburg, Sweden.
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37
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Jang HR, Gandolfo MT, Ko GJ, Satpute S, Racusen L, Rabb H. Early exposure to germs modifies kidney damage and inflammation after experimental ischemia-reperfusion injury. Am J Physiol Renal Physiol 2009; 297:F1457-65. [PMID: 19675178 DOI: 10.1152/ajprenal.90769.2008] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Kidney ischemia-reperfusion injury (IRI) is, in part, mediated by immune and inflammatory factors. Since microbial stimuli are known to alter immune and inflammatory responses, we hypothesized that differences in perinatal microbial status would modify renal injury following IRI. We performed bilateral renal IRI on 6-wk-old germ-free and control mice and studied the effects on kidney lymphocyte trafficking, cytokines, function, and structure. Compared with control mice, normal kidneys of germ-free mice exhibited more NKT cells and lower IL-4 levels. Postischemia, more CD8 T cells trafficked into postischemic kidneys of germ-free mice compared with control mice. Renal structural injury and functional decline following IRI were more severe in germ-free mice compared with control mice. When germ-free mice were conventionalized with the addition of bacteria to their diet, the extent of renal injury after IRI became equivalent to age-matched control mice, with similar numbers and phenotypes of T cells and NKT cells, as well as cytokine expression in both normal kidneys and postischemic kidneys of conventionalized germ-free mice and age-matched control mice. Thus microbial stimuli influence the phenotype of renal lymphocytes and the expression of cytokines of normal kidneys and also modulate the outcome of IRI.
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Affiliation(s)
- Hye Ryoun Jang
- Nephrology Division, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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The effect of murine anti-thymocyte globulin on experimental kidney warm ischemia-reperfusion injury in mice. Transpl Immunol 2009; 22:44-54. [PMID: 19682579 DOI: 10.1016/j.trim.2009.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/23/2009] [Accepted: 08/04/2009] [Indexed: 11/21/2022]
Abstract
Kidney ischemia-reperfusion injury (IRI) is an important contributor to delayed graft function (DGF) and poor outcome of allografts. Small clinical studies suggest a beneficial role for human anti-thymocyte globulin (ATG) in DGF. We investigated the short-term effect of mouse anti-thymocyte globulin (mATG) on kidney warm IRI in mice. We administered either mATG, rabbit immunoglobulin (RIgG), or saline with different dosing schedules in three different IRI models: 30 min bilateral, 60 min bilateral, and 45min unilateral IRI. mATG effectively depleted circulating T cells but had less effect on kidney-infiltrating T cells. There was no difference in serum creatinine levels between groups in each study. Scoring of renal tubular damage and regenerating tubules revealed no difference between groups. The percentage of CD3(+)CD4(-)CD8(-) double-negative (DN) T cells, which were reported to contribute to the pathogenesis of lupus nephritis, increased and the percentages of regulatory T cells and NK cells decreased in the post-ischemic kidneys of mATG treated mice. mATG did not alter the expression of pro-inflammatory cytokines such as IFN-gamma or anti-inflammatory cytokines such as IL-10 in post-ischemic kidneys. mATG treatment, whether initiated before ischemia or immediately after reperfusion, had minimal effects on renal injury following warm IRI in mice.
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Liu P, Li H, Cepeda J, Xia Y, Kempf JA, Ye H, Zhang LQ, Ye SQ. Regulation of inflammatory cytokine expression in pulmonary epithelial cells by pre-B-cell colony-enhancing factor via a nonenzymatic and AP-1-dependent mechanism. J Biol Chem 2009; 284:27344-51. [PMID: 19654329 DOI: 10.1074/jbc.m109.002519] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Although our previous studies found Pre-B-cell colony-enhancing factor (PBEF) as a highly up-regulated gene in acute lung injury that could stimulate expressions of other inflammatory cytokines, the underlying molecular mechanisms remain to be fully elucidated. Growing evidence indicates that PBEF is a nicotinamide phosphoribosyltransferase involved in the mammalian salvage pathway of NAD synthesis. This study was designed to determine whether the effect of PBEF to stimulate expressions of inflammatory cytokines depends on its enzymatic activity. We prepared two human PBEF mutant (H247E and H247A) recombinant proteins and overexpressing constructs for their overexpressions in A549 cells and confirmed that enzymatic activities of both mutants were nearly or completely abolished. Two mutants stimulated interleukin-8 (IL-8) expression at both the mRNA level and protein level just as equally effective as the wild-type PBEF did. These effects were due to the increased transcription, not the mRNA stability, of the IL-8 gene. Reporter gene assays and gel shift experiments indicated that AP-1 transcription factor is required to mediate these effects. SB203580, a p38 MAPK pathway inhibitor, and JNK inhibitor 1 can attenuate these effects. Both PBEF mutants similarly stimulated the expression of two other inflammatory cytokines: IL-16 and CCR3. These results indicate that PBEF stimulated expression of IL-8, IL-16, and CCR3 via its non-enzymatic activity. This effect is AP-1-dependent, in part via the p38 MAPK pathway and the JNK pathway. This finding reveals a new insight, which may manifest a novel role of PBEF in the pathogenesis of acute lung injury and other inflammatory disorders.
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Affiliation(s)
- Peng Liu
- Department of Surgery, University of Missouri, Columbia, Missouri 65212, USA
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The interaction between ischemia-reperfusion and immune responses in the kidney. J Mol Med (Berl) 2009; 87:859-64. [PMID: 19562316 DOI: 10.1007/s00109-009-0491-y] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 05/17/2009] [Accepted: 05/27/2009] [Indexed: 12/18/2022]
Abstract
Kidney ischemia-reperfusion injury (IRI) engages both the innate and adaptive immune responses. Cellular mediators of immunity, such as dendritic cells, neutrophils, macrophages, natural killer T, T, and B cells, contribute to the pathogenesis of renal injury after IRI. Postischemic kidneys express increased levels of adhesion molecules on endothelial cells and toll-like receptors on tubular epithelial cells. Soluble components of the immune system, such as complement activation proteins and cytokines, also participate in injury/repair of postischemic kidneys. Experimental studies on the immune response in kidney IRI have resulted in better understanding of the mechanisms underlying IRI and led to the discovery of novel therapeutic and diagnostic targets.
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Liu P, Li H, Cepeda J, Zhang LQ, Cui X, Garcia JGN, Ye SQ. Critical role of PBEF expression in pulmonary cell inflammation and permeability. Cell Biol Int 2008; 33:19-30. [PMID: 18996492 DOI: 10.1016/j.cellbi.2008.10.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2008] [Revised: 09/05/2008] [Accepted: 10/13/2008] [Indexed: 01/11/2023]
Abstract
Previous studies in our lab have identified pre-B-cell colony enhancing factor (PBEF) as a novel biomarker in acute lung injury. This study continues to elucidate the underlying molecular mechanism of PBEF in the pathogenesis of acute lung injury in pulmonary cell culture models. Our results revealed that IL-1beta induced PBEF expression in pulmonary vascular endothelial cells at the transcriptional level and a -1535 T-variant in the human PBEF gene promoter significantly attenuated its binding to an IL-1beta-induced unknown transcription factor. This may underlie the reduced expression of PBEF and thus the lower susceptibility to acute lung injury in -1535T carriers. Furthermore, overexpression of PBEF significantly augmented IL-8 secretion and mRNA expression by more than 6-fold and 2-fold in A549 cells and HPAEC, respectively. It also significantly augmented IL-1beta-mediated cell permeability by 44% in A549 cells and 65% in endothelial cells. The knockdown of PBEF expression significantly inhibited IL-1beta-stimulated IL-8 secretion and mRNA level by 60% and 70%, respectively, and the knockdown of PBEF expression also significantly attenuated IL-1beta-induced cell permeability by 29% in epithelial cells and 24% in endothelial cells. PBEF expression also affected the expression of two other inflammatory cytokines (IL-16 and CCR3 genes). These results suggest that PBEF is critically involved in pulmonary vascular and epithelial inflammation and permeability, which are hallmark features in the pathogenesis of acute lung injury. This study lends further support to our finding that PBEF is a potential new target in acute lung injury.
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Affiliation(s)
- Peng Liu
- Department of Surgery and Department of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212, USA
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Jang HR, Rabb H. The innate immune response in ischemic acute kidney injury. Clin Immunol 2008; 130:41-50. [PMID: 18922742 DOI: 10.1016/j.clim.2008.08.016] [Citation(s) in RCA: 251] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2008] [Accepted: 08/10/2008] [Indexed: 11/30/2022]
Abstract
Kidney ischemia reperfusion injury is a major cause of morbidity in both allograft and native kidneys. Ischemia reperfusion-induced acute kidney injury is characterized by early, alloantigen-independent inflammation. Major components of the innate immune system are activated and participate in the pathogenesis of acute kidney injury, plus prime the allograft kidney for rejection. Soluble members of innate immunity implicated in acute kidney injury include the complement system, cytokines, and chemokines. Toll-like receptors (TLRs) are also important contributors. Effector cells that participate in acute kidney injury include the classic innate immune cells, neutrophils and macrophages. Recent data has unexpectedly identified lymphocytes as participants of early acute kidney injury responses. In this review, we will focus on immune mediators that participate in the pathogenesis of ischemic acute kidney injury.
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Affiliation(s)
- Hye Ryoun Jang
- Nephrology Division, Department of Medicine, Johns Hopkins University School of Medicine, Ross Building, Room 965, 720 Rutland Avenue, Baltimore, MD 21205, USA
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