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You Y, Qin Y, Lin X, Yang F, Li J, Sooranna SR, Pinhu L. Methylprednisolone attenuates lipopolysaccharide-induced Fractalkine expression in kidney of Lupus-prone MRL/lpr mice through the NF-kappaB pathway. BMC Nephrol 2015; 16:148. [PMID: 26310926 PMCID: PMC4551515 DOI: 10.1186/s12882-015-0145-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 03/05/2015] [Accepted: 08/20/2015] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Fractalkine (FKN) is involved in the occurrence and development of human lupus nephritis. It is known to be upregulated by lipopolysaccharide (LPS) as a stimulus in vivo. MRL/lpr mice have been used as an in vivo model to study lupus nephritis. Methylprednisolone (MP) is used widely in the clinical treatment of progressive glomerular diseases such as lupus nephritis. The aim of this study is to explore the mechanism of LPS induced FKN expression and to determine whether other molecular mechanisms contribute to the signaling pathway of MP action in MRL/lpr mice. METHODS Forty-eight female MRL/lpr mice at 12 weeks of age were randomly distributed into six groups. Each group received various treatments for 8 weeks by receiving twice weekly intraperitoneal injections of (1) MP (MP-treated mice), of (2) SC-514 (SC-514-induced mice), of (3) normal saline and a single injection of LPS (LPS-induced mice), of (4) MP and a single injection of LPS (LPS + MP mice), of (5) SC-514 and a single injection of LPS (LPS + SC mice) and of (6) normal saline (control mice). One-way ANOVA was used for data analysis and P value <0.05 was considered statistically significantly. RESULTS The expression of FKN and NF-kappaB p65 mRNA was detected by qPCR. The expression of FKN protein and the activation of NF-kappaB p65 were detected by immunohistochemistry and western blots respectively. The expression of FKN in the kidney of LPS induced mice was significantly increased and this was mediated by increased expression of NF-κB p65 and an increase in NF-kappaB phospho-p65. MP reduced proteinuria and ameliorated the renal damage in MRL/lpr mice. MP as well as the NF-kappaB inhibitor, SC-514, inhibited the LPS-induced increase of expression of FKN and the activation of NF-kappaB. CONCLUSIONS The results indicate that MP attenuates LPS-induced FKN expression in kidney of MRL/lpr mice through the NF-kappaB pathway.
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Affiliation(s)
- Yanwu You
- Department of Nephrology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
| | - Yueqiu Qin
- Department of Gastroenterology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
| | - Xu Lin
- Department of Nephrology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
| | - Fafen Yang
- Department of Nephrology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
| | - Jun Li
- Department of Intensive Care Medicine, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
| | - Suren R Sooranna
- Department of Surgery and Cancer, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK.
| | - Liao Pinhu
- Department of Intensive Care Medicine, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi Zhuang Autonomous Region, China.
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Zhang Q, Liu YF, Su ZX, Shi LP, Chen YH. Serum fractalkine and interferon-gamma inducible protein-10 concentrations are early detection markers for acute renal allograft rejection. Transplant Proc 2015; 46:1420-5. [PMID: 24935307 DOI: 10.1016/j.transproceed.2014.02.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 01/23/2014] [Accepted: 02/27/2014] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The aims of this study were to determine if characterization of serum concentrations of interferon-gamma inducible protein-10 (IP-10), fractalkine, and their receptors (CXCR3 and CX3CR1) were predictive of acute allograft rejection in kidney transplant recipients. METHODS Kidney transplant recipients (n = 52) were enrolled in this study and divide into either the acute rejection (AR, n = 15) or non-acute rejection (NAR, n = 35) groups. Serum samples from recipients were collected 1 day prior to transplantation and on days 1, 3, 5, 7, and 9 post-transplantation. The accuracy of chemokine concentrations for predicting acute rejection episodes was evaluated using receiver operator characteristic (ROC) curves. RESULTS AR was diagnosed in 15 patients based on histologic changes to renal biopsies. AR patients had significantly higher serum fractalkine, CXCR1, IP-10, and CXCR3 levels compared to levels observed in the NAR group and healthy controls. Fractalkine and IP-10 had the largest area under the ROC curve at 0.86 (95% confidence interval: 0.77-0.96). Following steroid therapy, chemokine levels decreased, which may serve to predict the therapeutic response to steroid therapy. CONCLUSION Measuring serum levels of fractalkine, IP-10, and their receptors (especially the fractalkine/IP-10 combination) may serve as a noninvasive approach for the early diagnosis of renal allograft rejection.
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Affiliation(s)
- Q Zhang
- Department of Urinary Surgery, the First Affiliated Hospital of Jinan University Guangzhou, Guangdong, China
| | - Y-F Liu
- Department of Urinary Surgery, the First Affiliated Hospital of Jinan University Guangzhou, Guangdong, China
| | - Z-X Su
- Department of Urinary Surgery, the First Affiliated Hospital of Jinan University Guangzhou, Guangdong, China.
| | - L-P Shi
- Department of Urinary Surgery, the First Affiliated Hospital of Jinan University Guangzhou, Guangdong, China
| | - Y-H Chen
- Department of Urinary Surgery, the First Affiliated Hospital of Jinan University Guangzhou, Guangdong, China
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Aizawa M, Suzuki Y, Suzuki H, Pang H, Kihara M, Nakata J, Yamaji K, Horikoshi S, Tomino Y. Uncoupling of glomerular IgA deposition and disease progression in alymphoplasia mice with IgA nephropathy. PLoS One 2014; 9:e95365. [PMID: 24743510 PMCID: PMC3990643 DOI: 10.1371/journal.pone.0095365] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 03/25/2014] [Indexed: 11/18/2022] Open
Abstract
Previous clinical and experimental studies have indicated that cells responsible for IgA nephropathy (IgAN), at least in part, are localized in bone marrow (BM). Indeed, we have demonstrated that murine IgAN can be experimentally reconstituted by bone marrow transplantation (BMT) from IgAN prone mice in not only normal mice, but also in alymphoplasia mice (aly/aly) independent of IgA+ cells homing to mucosa or secondary lymphoid tissues. The objective of the present study was to further assess whether secondary lymph nodes (LN) contribute to the progression of this disease. BM cells from the several lines of IgAN prone mice were transplanted into aly/aly and wild-type mice (B6). Although the transplanted aly/aly showed the same degree of mesangial IgA and IgG deposition and the same serum elevation levels of IgA and IgA-IgG immune-complexes (IC) as B6, even in extent, the progression of glomerular injury was observed only in B6. This uncoupling in aly/aly was associated with a lack of CD4+ T cells and macrophage infiltration, although phlogogenic capacity to nephritogenic IC of renal resident cells was identical between both recipients. It is suggested that secondary LN may be required for the full progression of IgAN after nephritogenic IgA and IgA/IgG IC deposition.
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Affiliation(s)
- Masashi Aizawa
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Yusuke Suzuki
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Hitoshi Suzuki
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Huihua Pang
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Masao Kihara
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Junichiro Nakata
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Kenji Yamaji
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Satoshi Horikoshi
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Yasuhiko Tomino
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
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Song KH, Park J, Park JH, Natarajan R, Ha H. Fractalkine and its receptor mediate extracellular matrix accumulation in diabetic nephropathy in mice. Diabetologia 2013; 56:1661-9. [PMID: 23604552 PMCID: PMC4737593 DOI: 10.1007/s00125-013-2907-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 03/13/2013] [Indexed: 11/27/2022]
Abstract
AIMS/HYPOTHESIS Fractalkine (FKN) is a unique chemokine that works as a chemoattractant and an adhesion molecule. Previous studies have demonstrated that FKN plays a role in ischaemic and protein-overload renal injury via its cognate receptor chemokine (C-X3-C motif) receptor 1 (CX3CR1). However, involvement of the FKN/CX3CR1 system in diabetic nephropathy remains unclear. We examined the role of FKN/CX3CR1 in diabetic mice and mouse mesangial cells (MMCs). METHODS Streptozotocin (50 mg kg(-1) day(-1)) was intraperitoneally administered for 5 days to male Cx3cr1-knockout (KO) mice and wild-type (WT) mice. MMCs transfected with Fkn (also known as Cx3cl1) or Cx3cr1 siRNA, respectively, were used to elucidate the role of FKN/CX3CR1 in extracellular matrix (ECM) synthesis. RESULTS At 12 weeks, diabetic Cx3cr1 KO mice showed no significant changes in plasma glucose, but markers of renal inflammation, fibrosis and ECM, such as the fractional mesangial area, fibronectin and collagen, were significantly lower in diabetic Cx3cr1 KO mice compared with diabetic WT mice. High glucose, oleic acid and TGF-β1 stimulated FKN and CX3CR1 expression, together with the expression of ECM proteins in MMCs, but the effects were significantly attenuated by Fkn or Cx3cr1 siRNA. More importantly, FKN itself increased mesangial ECM through CX3CR1 and subsequent activation of reactive oxygen species and mitogen-activated protein kinases. A neutralising TGF-β antibody inhibited FKN/CX3CR1 in MMCs treated with diabetic stimuli and decreased FKN-induced ECM accumulation. CONCLUSIONS/INTERPRETATION These results demonstrate that FKN/CX3CR1 may play an important role in diabetic renal injury through upregulation of ECM synthesis and could therefore be a therapeutic target for preventing diabetic nephropathy.
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Affiliation(s)
- K. H. Song
- Department of Bioinspired Science, Division of Life and Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-752, Korea
| | - J. Park
- Department of Bioinspired Science, Division of Life and Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-752, Korea
| | - J. H. Park
- Department of Bioinspired Science, Division of Life and Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-752, Korea
| | - R. Natarajan
- Department of Diabetes, Beckman Research, Institute of City of Hope, Duarte, CA, USA
| | - H. Ha
- Department of Bioinspired Science, Division of Life and Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-752, Korea
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Involvement of the intrarenal renin-angiotensin system in experimental models of glomerulonephritis. J Biomed Biotechnol 2012; 2012:601786. [PMID: 22811597 PMCID: PMC3395438 DOI: 10.1155/2012/601786] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 06/09/2012] [Indexed: 01/13/2023] Open
Abstract
The intrarenal renin-angiotensin system (RAS) has several pathophysiologic functions not only in blood pressure regulation but also in the development of glomerulonephritis (GN). Angiotensin II (Ang II) is the biologically active product of the RAS. Locally produced Ang II induces inflammation, renal cell growth, mitogenesis, apoptosis, migration, and differentiation, regulates the gene expression of bioactive substances, and activates multiple intracellular signaling pathways, leading to tissue damage. Activation of the Ang II type 1 (AT1) receptor pathway results in the production of proinflammatory mediators, cell proliferation, and extracellular matrix synthesis, which facilitates glomerular injury. Previous studies have shown that angiotensin-converting enzyme inhibitors and/or AT1 receptor blockers have beneficial effects in experimental GN models and humans with various types of GN, and that these effects are more significant than their suppressive effects on blood pressure. In this paper, we focus on intrarenal RAS activation in the pathophysiology of experimental models of GN.
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van Roeyen CRC, Ostendorf T, Floege J. The platelet-derived growth factor system in renal disease: an emerging role of endogenous inhibitors. Eur J Cell Biol 2011; 91:542-51. [PMID: 21872965 DOI: 10.1016/j.ejcb.2011.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 07/05/2011] [Accepted: 07/05/2011] [Indexed: 01/28/2023] Open
Abstract
The platelet-derived growth factor (PDGF) family consists of four isoforms which are secreted as homodimers (PDGF-AA, PDGF-BB, PDGF-CC and PDGF-DD) or heterodimers (PDGF-AB), and two receptor chains (PDGFR-α and -β). All members of the PDGF system are constitutively or inducibly expressed in renal cells and are involved in the regulation of cell proliferation and migration, the accumulation of extracellular matrix proteins and the secretion of pro- and anti-inflammatory mediators. Particular roles have been identified in mediating mesangioproliferative changes, renal interstitial fibrosis and glomerular angiogenesis. Different endogenous inhibitors of PDGF-induced biological responses exist which affect the activation/deactivation of PDGF isoforms, the activity of the PDGFRs, or which block downstream signaling pathways of the autophosphorylated PDGFRs. The novel endogenous inhibitor nephroblastoma overexpressed gene (NOV, CCN3) reduces PDGF-induced cell proliferation and is downregulated by PDGF isoforms itself. Among all identified inhibitors only few "true" PDGF antagonists have been identified. A better understanding of these inhibitors may aid in the design of novel therapeutic approaches to PDGF-mediated diseases.
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Affiliation(s)
- Claudia R C van Roeyen
- Department of Nephrology and Clinical Immunology, RWTH University Hospital Aachen, Pauwelsstr. 30, D-52057 Aachen, Germany.
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Devitt A, Marshall LJ. The innate immune system and the clearance of apoptotic cells. J Leukoc Biol 2011; 90:447-57. [DOI: 10.1189/jlb.0211095] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Koziolek MJ, Müller GA, Zapf A, Patschan D, Schmid H, Cohen CD, Koschnick S, Vasko R, Bramlage C, Strutz F. Role of CX3C-chemokine CX3C-L/fractalkine expression in a model of slowly progressive renal failure. Nephrol Dial Transplant 2009; 25:684-98. [PMID: 19934081 DOI: 10.1093/ndt/gfp602] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The chemokine/chemokine receptor pair CX(3)C-L/CX(3)C-R is suspected to play a role in renal fibrogenesis. The aim of this study was to investigate their function in an animal model of slowly progressive chronic renal failure. METHODS Functional data were analysed in folic acid nephropathy (FAN) at different time points (up to day 142 after induction). Immunostaining for CX(3)C-L, CD3, S100A4, collagen type I, fibronectin, alpha-smooth muscle actin, Tamm-horsfall protein, aquaporin 1 and 2 as well as quantitative real-time PCR (qRT-PCR) for CX(3)C-L, CX(3)C-R and fibroblast-specific protein 1 (FSP-1) were performed. Additionally, regulatory mechanisms and functional activity of CX(3)C-L in murine proximal and distal tubular epithelial cells as well as in fibroblasts were investigated. RESULTS CX(3)C-L/GAPDH ratio was upregulated in FAN 3.4-fold at day 7 further increasing up to 7.1-fold at day 106. The expression of mRNA CX(3)C-L correlated well with CX(3)C-R (R(2) = 0.96), the number of infiltrating CD3+ cells (R(2) = 0.60) and the degree of tubulointerstitial fibrosis (R(2) = 0.56) and moderately with FSP-1 (R(2) = 0.33). Interleukin-1beta, tumour necrosis factor-alpha, transforming growth factor-beta as well as the reactive oxygen species (ROS) H(2)O(2) were identified by qRT-PCR as inductors of CX(3)C-L/fractalkine (FKN) in tubular epithelial cells. Functionally, CX(3)C-L/FKN chemoattracts peripheral blood mononuclear cells, activates several aspects of fibrogenesis and induces the mitogen-activated protein kinases in renal fibroblasts. CONCLUSIONS In FAN, there is a good correlation between the expression of CX(3)C-L with markers of interstitial inflammation and fibrosis which may result from upregulation by pro-inflammatory and pro-fibrotic cytokines as well as by ROS in tubular epithelial cells. The FKN system may promote renal inflammation and renal fibrogenesis.
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Affiliation(s)
- Michael J Koziolek
- Department of Nephrology and Rheumatology, Georg-August University Göttingen, 37075 Göttingen, Germany.
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McIntosh LM, Barnes JL, Barnes VL, McDonald JR. Selective CCR2-targeted macrophage depletion ameliorates experimental mesangioproliferative glomerulonephritis. Clin Exp Immunol 2008; 155:295-303. [PMID: 19040610 DOI: 10.1111/j.1365-2249.2008.03819.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The CCL2/CCR2 chemokine/receptor axis directs the chemotaxis of infiltrating monocytes/macrophages and T cells and plays a pivotal role in tissue damage and fibrosis in kidney diseases. The eradication of the activated leucocytes should diminish the production of inflammatory mediators, limit tissue damage and ameliorate disease. A recombinant fusion protein (OPL-CCL2-LPM) comprised of the human CCL2 (monocyte chemoattractant protein-1) chemokine fused to a truncated form of the enzymatically active A1 domain of Shigella dysenteriae holotoxin (SA1) has been developed. The CCL2 portion binds specifically to CCR2-bearing leucocytes and the fusion protein enters the cells, where the SA1 moiety inhibits protein synthesis resulting in cell death. The compound was tested in a model of anti-thymocyte serum (ATS)-induced mesangioproliferative glomerulonephritis (ATS-GN). Male rats were injected with ATS on day 0 and treated intravenously with vehicle, 50 or 100 microg/kg of OPL-CCL2-LPM Q2D from days 2, 4, 6 and 8. Urine and blood were collected on days 0, 5 and 9. Animals were sacrificed on day 9. No treatment-related effects on body weight or signs of clinical toxicity were observed. Urine protein levels were decreased in treated animals. At the highest dose, histopathological analyses of kidney sections revealed maximum reductions of 36, 31, 30 and 24% for macrophage count, glomerular lesions, alpha-smooth muscle actin and fibronectin respectively. These results indicate a significant protective effect of OPL-CCL2-LPM in this model of nephritis.
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Affiliation(s)
- L M McIntosh
- Osprey Pharmaceuticals Limited, St Laurent, Quebec, Canada
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Floege J, Eitner F, Alpers CE. A New Look at Platelet-Derived Growth Factor in Renal Disease. J Am Soc Nephrol 2007; 19:12-23. [DOI: 10.1681/asn.2007050532] [Citation(s) in RCA: 235] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Yoshimoto S, Nakatani K, Iwano M, Asai O, Samejima KI, Sakan H, Terada M, Harada K, Akai Y, Shiiki H, Nose M, Saito Y. Elevated levels of fractalkine expression and accumulation of CD16+ monocytes in glomeruli of active lupus nephritis. Am J Kidney Dis 2007; 50:47-58. [PMID: 17591524 DOI: 10.1053/j.ajkd.2007.04.012] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Accepted: 04/19/2007] [Indexed: 11/11/2022]
Abstract
BACKGROUND Fractalkine (Fkn) is a chemokine that affects cells expressing its receptor, CX3CR1, including CD16-positive (CD16+) monocytes/macrophages (CD16+ Mos). The relationship of levels of glomerular Fkn expression and infiltration by CD16+ Mos with the severity and diversity of glomerular lesions in human lupus nephritis is not known. STUDY DESIGN Retrospective cross-sectional analysis of variables observed in biopsy specimens. SETTINGS & PARTICIPANTS 88 patients with systemic lupus erythematosus. PREDICTOR Histological class and severity of lupus nephritis according to the International Society of Nephrology/Renal Pathology Society and clinicopathologic factors. OUTCOMES Outcome variables are assays related to the degree of glomerular Fkn expression and CD16+ Mo infiltration. MEASUREMENTS Immunohistological grading of Fkn staining, number of CD16+ Mos, and messenger RNA levels of Fkn and CD16 in glomeruli. RESULTS Patients with proliferative lupus nephritis (class III and IV glomeruli) showed significantly greater glomerular Fkn expression and CD16+ Mo counts than those with other classes. Infiltrating CD16+ Mos within glomeruli expressed CX3CR1. Moreover, glomerular Fkn expression significantly correlated with the histopathologic activity index and CD16+ Mo counts, and CD16+ Mo counts significantly correlated with serum levels of blood urea nitrogen, complement (CH50), and anti-DNA antibody; estimated glomerular filtration rate; and urinary protein excretion. Glucocorticoid therapy had a tendency to decrease both glomerular Fkn expression and CD16+ Mo counts. LIMITATIONS Only frozen biopsy specimens (from 49 patients) were analyzed for the evaluation of glomerular Fkn expression. CONCLUSION Disease activity and proliferative glomerular lupus nephritis lesions are associated with the glomerular Fkn expression and CD16+ Mo accumulation.
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Affiliation(s)
- Shuhei Yoshimoto
- First Department of Internal Medicine, Nara Medical University, Kashihara, Nara, Japan
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Li Y, Tucci M, Narain S, Barnes EV, Sobel ES, Segal MS, Richards HB. Urinary biomarkers in lupus nephritis. Autoimmun Rev 2005; 5:383-8. [PMID: 16890891 DOI: 10.1016/j.autrev.2005.10.006] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2005] [Accepted: 10/06/2005] [Indexed: 11/15/2022]
Abstract
There has long been a need for biomarkers of disease activity in lupus nephritis (LN). Such markers ideally would be capable of detecting early sub-clinical disease and could be used to gauge response to therapy thus obviating the need for serial renal biopsies. Since urine can be readily obtained it lends itself as an obvious biological sample. Much of the focus has been on the measurement of urinary chemokines and cytokines in patients with LN. Elevations in urinary IL-6 and IL-10 had initially been reported to be associated with disease activity in LN but these markers have proven to be less reliable in larger studies. We and others have recently reported that MCP-1, a key chemokine involved in monocyte chemotaxis can be consistently found at high levels in the urine of patients with active LN. Moreover urinary MCP-1 levels decline with treatment of nephritis. In contrast urinary IL-8, a chemokine involved primarily in neutrophil chemotaxis is not a good predictor of disease activity in LN. Further longitudinal studies with larger numbers of patients are needed to determine the utility of urinary biomarkers such as MCP-1 which may act as surrogates of ongoing inflammation in LN.
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Affiliation(s)
- Yi Li
- Department of Medicine, Division of Rheumatology and Clinical Immunology, University of Florida, Gainesville, FL 32610-0221, USA
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Kikuchi Y, Imakiire T, Hyodo T, Kushiyama T, Higashi K, Hyodo N, Suzuki S, Miura S. Advanced glycation end-product induces fractalkine gene upregulation in normal rat glomeruli. Nephrol Dial Transplant 2005; 20:2690-6. [PMID: 16234287 DOI: 10.1093/ndt/gfi232] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND We previously reported that fractalkine was upregulated in streptozotocin-induced diabetic kidneys. Fractalkine in diabetic kidneys was detected on glomerular capillaries and the mesangium. This upregulation was suppressed by treatment with angiotensin-converting enzyme inhibitor (ACE-I) or aminoiguanidine. We examined what factors induce fractalkine upregulation in normal rat glomeruli. METHODS Glomeruli were collected from the kidneys of normal Sprague-Dawley rats by a microdissection method. Ten glomeruli were incubated in a solution with glucose, mannitol, angiotensin II, tumour necrosis factor (TNF)-alpha and advanced glycation end-product (AGE)-bovine serum albumin (BSA) for 1, 2 and 4 h. Fractalkine mRNA expression in glomeruli was examined by reverse transcription-polymerase chain reaction. RESULTS Fractalkine mRNA levels in the 30 mM glucose solution significantly increased (121%) compared with those in the control or 30 mM mannitol solution at 1 h. Fractalkine mRNA levels in the 15 mM glucose solution showed no significant differences at 1 or 2 h, but significantly increased (106%) after 4 h incubation. Fractalkine mRNA levels in 10(-6)-10(-8) M angiotensin II solution showed no significant differences. Fractalkine mRNA levels in the 5 or 10 ng/ml TNF-alpha solution significantly increased compared with those in the control in a time- and dose-dependent manner (by 94 to 253%). Fractalkine mRNA levels in the 50-200 microg/ml AGE-BSA solution also increased compared with those in BSA solution in a time- and dose-dependent manner (by 119 to 261%). By pre-incubation with MG132, a nuclear factor-kappaB inhibitor, fractalkine upregulation by AGE-BSA or 30 mM glucose was completely suppressed. CONCLUSIONS High glucose levels, AGE formation and cytokine activation in diabetes may induce fractalkine upregulation in the kidneys and lead to progression of diabetic nephropathy.
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Affiliation(s)
- Yuichi Kikuchi
- Second Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513 Japan.
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Minciullo P, Patafi M, Giannetto L, Merendino R, Di Pasquale G, Morabito F, Pacchiano E, Ferlazzo B, De Luca G, Gangemi S. The CX3C-Chemokine Fractalkine (CX3CL1) is Detectable in Serum of Patients Affected by the Inflammatory Diseases Allergic Rhinitis and/or Asthma. EUR J INFLAMM 2005. [DOI: 10.1177/1721727x0500300307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Fractalkine (FKN) is a chemokine able to mediate the initial capture, firm adhesion, and activation of circulating leukocytes. Many tissues express FKN mRNA and FKN expression is increased during inflammatory conditions. To assess a possible involvement in allergic airway disease, we detected serum levels of FKN in a group of patients affected by allergic rhinitis and/or asthma and found high serum levels of FKN in all patients and in only 26% of healthy donors at lower concentrations. The present results underscore the potential role that this chemokine may play in the pathogenesis of respiratory allergic diseases.
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Affiliation(s)
| | | | | | | | - G. Di Pasquale
- Department of Pediatric Science and Medical Surgery, University Hospital “G. Martino”, Messina
| | - F. Morabito
- Bone Marrow Transplant Unit, Azienda Ospedaliera Bianchi-Melacrino-Morelli, Reggio Calabria
| | - E. Pacchiano
- Service of Immuno-Transfusion, Azienda Ospedaliera Bianchi-Melacrino-Morelli, Reggio Calabria, Italy
| | | | - G. De Luca
- Department of Pediatric Science and Medical Surgery, University Hospital “G. Martino”, Messina
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Lin SL, Chiang WC, Chen YM, Lai CF, Tsai TJ, Hsieh BS. The renoprotective potential of pentoxifylline in chronic kidney disease. J Chin Med Assoc 2005; 68:99-105. [PMID: 15813241 DOI: 10.1016/s1726-4901(09)70228-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Current interventions with proven efficacy, such as glycemic and blood pressure control, dietary protein restriction, and angiotensin II blockade, slow the progression of chronic kidney disease (CKD); however, whether long-term cessation of CKD progression is possible remains unclear. Because of the pathogenetic complexity of this condition, multidrug interventions with the least adverse effects should be investigated as the next step in attempts to stop CKD progression. Pentoxifylline, a non-selective phosphodiesterase inhibitor with indiscernible toxicity, exerts potent inhibitory effects against cell proliferation, inflammation, and extracellular matrix accumulation, all of which play important roles in CKD progression. Pentoxifylline monotherapy markedly reduces proteinuria in patients with membranous nephropathy. Moreover, limited human studies have proven pentoxifylline efficacy in reducing proteinuria in patients with diabetes receiving angiotensin-converting enzyme inhibitors, and in patients with nephrotic syndrome secondary to lupus nephritis despite immunosuppressive therapy. Further clinical trials are necessary to examine whether pentoxifylline can improve renal outcomes in patients receiving interventions of proven efficacy.
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Affiliation(s)
- Shuei-Liong Lin
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan, R.O.C
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Pietrzyk MC, Banas B, Wolf K, Rümmele P, Woenckhaus M, Hoffmann U, Krämer BK, Fischereder M. Quantitative gene expression analysis of fractalkine using laser microdissection in biopsies from kidney allografts with acute rejection. Transplant Proc 2004; 36:2659-61. [PMID: 15621116 DOI: 10.1016/j.transproceed.2004.09.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Percutaneous biopsy of the kidney remains the gold standard to establish a diagnosis in renal diseases. Only semiquantitative assessments of gene expression on biopsies have been possible so far. We studied gene expression of the chemokine fractalkine (FKN) in 12 biopsies from laser microdissected kidney allografts that showed histologic signs of acute rejection and 10 controls. As quantified by real-time PCR, the relative tubular FKN expression increased from 1.0 [0.81 to 2.95] (median [range]) in controls to 12.44 [0.90 to 191.0] in acute rejection (P < .01); glomerular FKN expression from 1.3 [0.07 to 27.44] to 12.22 [1.32 to 50.23] (P < .05); and vascular expression, from 0.72 [0.37 to 5.11] to 7.07 [1.19 to 73.49] (P < .01). Furthermore, there was a trend toward higher glomerular FKN expression among patients with more severe rejection. Our results suggest a role of FKN in acute renal allograft rejection.
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Affiliation(s)
- M C Pietrzyk
- Klinik und Poliklinik für Innere Medizin II, University of Regensburg, 94042 Regensburg, Germany.
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Lin SL, Chen YM, Chiang WC, Tsai TJ, Chen WY. Review Article. Pentoxifylline: A potential therapy for chronic kidney disease. Nephrology (Carlton) 2004; 9:198-204. [PMID: 15363050 DOI: 10.1111/j.1440-1797.2004.00267.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Almost all forms of chronic kidney disease progressing to end-stage kidney failure are characterized by diffuse fibrosis, a final common pathway converging from multiple pathogenetic networks regardless of the initial injury. Four principal interventions including glycaemic and blood pressure control, dietary protein restriction, and angiotensin II blockade have been proven to slow progression of diabetic and/or non-diabetic chronic kidney disease. However, the ultimate solution to halt disease progression in the long term is still pending. Because of the pathogenetic complexity of kidney disease, multidrug intervention with the least side-effects should, without doubt, be the next step to stop kidney disease progression. Animal and cellular studies have demonstrated the rationale for pentoxifylline (i.e. its effects against cell proliferation, inflammation, and extracellular matrix accumulation) in the treatment of chronic kidney disease induced by immune- or non-immune-mediated mechanisms. Limited human studies have proven its efficacy in reducing proteinuria in patients with diabetes receiving angiotensin-converting enzyme inhibitors, and in patients with nephrotic syndrome refractory to conventional immunosuppressive therapy. Moreover, monotherapy with pentoxifylline markedly reduces proteinuria in patients with membranous nephropathy. Further studies are required to examine whether pentoxifylline can improve the renal outcome in patients receiving interventions with proven efficacy.
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Affiliation(s)
- Shuei-Liong Lin
- Department of Internal Medicine, National Taiwan University Hospital and Department of Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
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