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Zhdanova DY, Kovalev VI, Chaplygina AV, Bobkova NV, Poltavtseva RA, Sukhikh GT. YB-1 Protein Prevents Age-Related Decline in Plasma Estradiol in Aging Female 5xFAD Transgenic Mice. J EVOL BIOCHEM PHYS+ 2023. [DOI: 10.1134/s0022093023010192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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2
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Abstract
RNA-binding proteins (RBPs) are of fundamental importance for post-transcriptional gene regulation and protein synthesis. They are required for pre-mRNA processing and for RNA transport, degradation and translation into protein, and can regulate every step in the life cycle of their RNA targets. In addition, RBP function can be modulated by RNA binding. RBPs also participate in the formation of ribonucleoprotein complexes that build up macromolecular machineries such as the ribosome and spliceosome. Although most research has focused on mRNA-binding proteins, non-coding RNAs are also regulated and sequestered by RBPs. Functional defects and changes in the expression levels of RBPs have been implicated in numerous diseases, including neurological disorders, muscular atrophy and cancers. RBPs also contribute to a wide spectrum of kidney disorders. For example, human antigen R has been reported to have a renoprotective function in acute kidney injury (AKI) but might also contribute to the development of glomerulosclerosis, tubulointerstitial fibrosis and diabetic kidney disease (DKD), loss of bicaudal C is associated with cystic kidney diseases and Y-box binding protein 1 has been implicated in the pathogenesis of AKI, DKD and glomerular disorders. Increasing data suggest that the modulation of RBPs and their interactions with RNA targets could be promising therapeutic strategies for kidney diseases.
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Li B, Li F, Gu T, Guo Y, Shen B, Xu X, Shen Z, Chen L, Zhang Q, Dong H, Cai X, Lu L. Specific knockdown of Y-box binding protein 1 in hepatic progenitor cells inhibits proliferation and alleviates liver fibrosis. Eur J Pharmacol 2022; 921:174866. [DOI: 10.1016/j.ejphar.2022.174866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/10/2021] [Accepted: 01/06/2022] [Indexed: 12/12/2022]
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4
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Shao L, Ma Y, Fang Q, Huang Z, Wan S, Wang J, Yang L. Role of protein phosphatase 2A in kidney disease (Review). Exp Ther Med 2021; 22:1236. [PMID: 34539832 PMCID: PMC8438693 DOI: 10.3892/etm.2021.10671] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 01/06/2021] [Indexed: 12/12/2022] Open
Abstract
Kidney disease affects millions of people worldwide and is a financial burden on the healthcare system. Protein phosphatase 2A (PP2A), which is involved in renal development and the function of ion-transport proteins, aquaporin-2 and podocytes, is likely to serve an important role in renal processes. PP2A is associated with the pathogenesis of a variety of different kidney diseases including podocyte injury, inflammation, tumors and chronic kidney disease. The current review aimed to discuss the structure and function of PP2A subunits in the context of kidney diseases. How dysregulation of PP2A in the kidneys causes podocyte death and the inactivation of PP2A in renal carcinoma tissues is discussed. Inhibition of PP2A activity prevents epithelial-mesenchymal transition and attenuates renal fibrosis, creating a favorable inflammatory microenvironment and promoting the initiation and progression of tumor pathogenesis. The current review also indicates that PP2A serves an important role in protection against renal inflammation. Understanding the detailed mechanisms of PP2A provides information that can be utilized in the design and application of novel therapeutics for the treatment and prevention of renal diseases.
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Affiliation(s)
- Lishi Shao
- Department of Radiology, Kunming Medical University and The Second Affiliated Hospital, Kunming, Yunnan 650500, P.R. China
| | - Yiqun Ma
- Department of Radiology, Kunming Medical University and The Second Affiliated Hospital, Kunming, Yunnan 650500, P.R. China
| | - Qixiang Fang
- Department of Urology, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
| | - Ziye Huang
- Department of Urology, Kunming Medical University and The Second Affiliated Hospital, Kunming, Yunnan 650500, P.R. China
| | - Shanshan Wan
- Department of Radiology, Yunnan Kun-Gang Hospital, Anning, Yunnan 650300, P.R. China
| | - Jiaping Wang
- Department of Radiology, Kunming Medical University and The Second Affiliated Hospital, Kunming, Yunnan 650500, P.R. China
| | - Li Yang
- Department of Anatomy, Histology and Embryology, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
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5
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Cyclosporin A activates human hepatocellular carcinoma (HepG2 cells) proliferation: implication of EGFR-mediated ERK1/2 signaling pathway. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:897-908. [PMID: 31907582 DOI: 10.1007/s00210-019-01798-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 12/19/2019] [Indexed: 11/27/2022]
Abstract
One of the most common causes of cancer mortality worldwide is hepatocellular carcinoma (HCC). Extracellular signal-regulated kinase (ERK1/2) pathway has been shown to play an important role in the development and progression of HCC. Here, we demonstrate that the immunosuppressive agent cyclosporin A (CsA) has the ability to increase the cellular growth in HCC (HepG2 cells) via activation of ERK1/2 signaling cascade. It was found that ERK1/2 phosphorylation induced by CsA was highly reduced in the presence of the reactive oxygen species (ROS) scavenger polyethylene glycol-superoxide dismutase (PEG-SOD). Furthermore, it was observed that inhibition of metalloproteinase activity using TAPI-2 prevents ERK1/2 activation by CsA. Moreover, a disintegrin and metalloproteinase domain 17 (ADAM-17) activity was found to be critical for ERK phosphorylation by CsA. In addition, CsA-induced ERK phosphorylation was highly reduced in the presence of either neutralizing anti-heparin-binding-epidermal growth factor (HB-EGF) antibody or UO126 (MEK inhibitor). By using the epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor AG1478, it was found that EGFR is critical for ERK phosphorylation induced by CsA. Furthermore, CsA-induced cell proliferation was strongly reduced in the presence of either PEG-SOD or TAPI-2 or neutralizing anti-ADAM17 antibody or neutralizing anti-HB-EGF antibody or AG1478 or UO126. Collectively, these data demonstrate that CsA has the ability to activate ERK1/2 signaling cascade that could be translated into an increase in HepG2 cell proliferation. Furthermore, these data support the role of ROS, ADAM-17, and EGFR in ERK1/2 signaling activation and subsequent cell proliferation induced by CsA in HepG2 cells.
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Hermert D, Martin IV, Reiss LK, Liu X, Breitkopf DM, Reimer KC, Alidousty C, Rauen T, Floege J, Ostendorf T, Weiskirchen R, Raffetseder U. The nucleic acid binding protein YB-1-controlled expression of CXCL-1 modulates kidney damage in liver fibrosis. Kidney Int 2019; 97:741-752. [PMID: 32061437 DOI: 10.1016/j.kint.2019.10.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 09/29/2019] [Accepted: 10/17/2019] [Indexed: 12/28/2022]
Abstract
Acute kidney injury is a common complication of advanced liver disease and increased mortality of these patients. Here, we analyzed the role of Y-box protein-1 (YB-1), a nucleic acid binding protein, in the bile duct ligation model of liver fibrosis and monitored liver and subsequent kidney damage. Following bile duct ligation, both serum levels of liver enzymes and expression of hepatic extracellular matrix components such as type I collagen were significantly reduced in mice with half-maximal YB-1 expression (Yb1+/-) as compared to their wild-type littermates. By contrast, expression of the chemokine CXCL1 was significantly augmented in these Yb1+/- mice. YB-1 was identified as a potent transcriptional repressor of the Cxcl1 gene. Precision-cut kidney slices from Yb1+/- mice revealed higher expression of the CXCL1 receptor CXCR2 as well as enhanced responsivity to CXCL1 compared to those from wild-type mice. Increased CXCL1 content in Yb1+/- mice led to pronounced bile duct ligation-induced damage of the kidneys monitored as parameters of tubular epithelial injury and immune cell infiltration. Pharmacological blockade of CXCR2 as well as application of an inhibitory anti-CXCL1 antibody significantly mitigated early systemic effects on the kidneys following bile duct ligation whereas it had only a modest impact on hepatic inflammation and function. Thus, our analyses provide direct evidence that YB-1 crucially contributes to hepatic fibrosis and modulates liver-kidney crosstalk by maintaining tight control over chemokine CXCL1 expression.
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Affiliation(s)
- Daniela Hermert
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Ina V Martin
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Lucy K Reiss
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH-Aachen University, Aachen, Germany
| | - Xiyang Liu
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Daniel M Breitkopf
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Katharina C Reimer
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | | | - Thomas Rauen
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Jürgen Floege
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Tammo Ostendorf
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), University Hospital RWTH-Aachen, Aachen, Germany
| | - Ute Raffetseder
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany.
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7
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Breitkopf DM, Jankowski V, Ohl K, Hermann J, Hermert D, Tenbrock K, Liu X, Martin IV, Wang J, Groll F, Gröne E, Floege J, Ostendorf T, Rauen T, Raffetseder U. The YB-1:Notch-3 axis modulates immune cell responses and organ damage in systemic lupus erythematosus. Kidney Int 2019; 97:289-303. [PMID: 31882173 DOI: 10.1016/j.kint.2019.09.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 09/01/2019] [Accepted: 09/30/2019] [Indexed: 01/17/2023]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease and lupus nephritis is a major risk factor for morbidity and mortality. Notch-3 signaling induced by membrane-bound or soluble ligands such as YB-1 constitutes an evolutionarily conserved pathway that determines major decisions in cell fate. Mass spectrometry of extracellular YB-1 in sera from patients with SLE and lupus-prone mice revealed specific post-translational guanidinylation of two lysine residues within the highly conserved cold-shock domain of YB-1 (YB-1-G). These modifications highly correlated with SLE disease activity, especially in patients with lupus nephritis and resulted in enhanced activation of Notch-3 signaling in T lymphocytes. The importance of YB-1:Notch-3 interaction in T cells was further evidenced by increased interleukin (Il)10 expression following YB-1-G stimulation and detection of both, YB-1-G and Notch-3, in kidneys of MRL.lpr mice by mass spectrometry imaging. Notch-3 expression and activation was significantly up-regulated in kidneys of 20-week-old MRL.lpr mice. Notably, lupus-prone mice with constitutional Notch-3 depletion (B6.Faslpr/lprNotch3-/-) exhibited an aggravated lupus phenotype with significantly increased mortality, enlarged lymphoid organs and aggravated nephritis. Additionally, these mice displayed fewer regulatory T cells and reduced amounts of anti-inflammatory IL-10. Thus, our results indicate that the YB-1:Notch-3 axis exerts protective effects in SLE and that Notch-3 deficiency exacerbates the SLE phenotype.
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Affiliation(s)
- Daniel M Breitkopf
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Vera Jankowski
- Institute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, Aachen, Germany
| | - Kim Ohl
- Department of Pediatrics, RWTH Aachen University, Aachen, Germany
| | - Juliane Hermann
- Institute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, Aachen, Germany
| | - Daniela Hermert
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Klaus Tenbrock
- Department of Pediatrics, RWTH Aachen University, Aachen, Germany
| | - Xiyang Liu
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Ina V Martin
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Jialin Wang
- Department of Nephrology, Zhongshan Hospital Fudan University, Shanghai, China
| | - Fabian Groll
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Elisabeth Gröne
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Heidelberg, Germany
| | - Jürgen Floege
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Tammo Ostendorf
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Thomas Rauen
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany.
| | - Ute Raffetseder
- Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany.
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9
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Zhu X, Ye Y, Xu C, Gao C, Zhang Y, Zhou J, Lin W, Mao J. Protein phosphatase 2A modulates podocyte maturation and glomerular functional integrity in mice. Cell Commun Signal 2019; 17:91. [PMID: 31387591 PMCID: PMC6685276 DOI: 10.1186/s12964-019-0402-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/22/2019] [Indexed: 01/08/2023] Open
Abstract
Background Protein phosphorylation & dephosphorylation are ubiquitous cellular processes that allow for the nuanced and reversible regulation of protein activity. Protein phosphatase 2A (PP2A) is a multifunction phosphatase that is well expressed in all cell types of kidney during early renal development, though its functions in kidney remains to be elucidated. Methods PP2A conditional knock-out mice was generated with PP2A fl/fl mice that were crossed with Podocin-Cre mice. The phenotype of Pod-PP2A–KO mice (homozygous for the floxed PP2A allele with Podocin-Cre) and littermate PP2A fl/fl controls (homozygous for the PP2A allele but lacking Podocin-Cre) were further studied. Primary podocytes isolated from the Pod-PP2A-KO mice were cultured and they were then employed with sing label-free nano-LC − MS/MS technology on a Q-exactive followed by SIEVE processing to identify possible target molecular entities for the dephosphorylation effect of PP2A, in which Western blot and immunofluorescent staining were used to analyze further. Results Pod-PP2A–KO mice were developed with weight loss, growth retardation, proteinuria, glomerulopathy and foot process effacement, together with reduced expression of some slit diaphragm molecules and cytoskeleton rearrangement of podocytes. Y box protein 1 (YB-1) was identified to be the target molecule for dephosphorylation effect of PP2A. Furthermore, YB-1 phosphorylation was up-regulated in the Pod-PP2A–KO mice in contrast to the wild type controls, while total and un-phosphorylated YB-1 both was moderately down-regulated in podocytes from the Pod-PP2A-KO mice. Conclusion Our study revealed the important role of PP2A in regulating the development of foot processes and fully differentiated podocytes whereas fine-tuning of YB-1 via a post-translational modification by PP2A regulating its activity might be crucial for the functional integrity of podocytes and glomerular filtration barrier. Graphic abstract ![]()
Electronic supplementary material The online version of this article (10.1186/s12964-019-0402-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiujuan Zhu
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, #57 Zhugan Lane, Hangzhou, 310003, Zhejiang Province, People's Republic of China
| | - Yuhong Ye
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, #57 Zhugan Lane, Hangzhou, 310003, Zhejiang Province, People's Republic of China
| | - Chengxian Xu
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, #57 Zhugan Lane, Hangzhou, 310003, Zhejiang Province, People's Republic of China
| | - Cunji Gao
- Chronic Disease Research Institute, Department of Nutrition and Food Hygiene, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang Province, People's Republic of China
| | - Yingying Zhang
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, #57 Zhugan Lane, Hangzhou, 310003, Zhejiang Province, People's Republic of China
| | - Jing Zhou
- Harvard Center for Polycystic Kidney Disease Research and Renal Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA02115, USA
| | - Weiqiang Lin
- Institute of Translational Medicine, School of Medicine, Zhejiang University, Hangzhou, 310058, Zhejiang Province, People's Republic of China.
| | - Jianhua Mao
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, #57 Zhugan Lane, Hangzhou, 310003, Zhejiang Province, People's Republic of China.
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10
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Brandt S, Mertens PR. A remedy for kidney disease successfully alters the cold shock protein response during inflammation. Kidney Int 2019; 90:1148-1150. [PMID: 27884304 DOI: 10.1016/j.kint.2016.07.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 07/28/2016] [Indexed: 12/18/2022]
Abstract
Kidneys undergoing acute inflammatory responses are characterized by cell infiltration and a cytokinergic milieu. The hazard resides in the perpetuation of inflammation and ensuing fibrosis. In this issue of Kidney International, Wang et al.4 identify the cold shock Y-box binding protein-1 as the key orchestrator of cell infiltration in experimental tubulointerstitial nephritis following ureteral obstruction. Intriguingly, a small molecule previously designed to interfere with Y-box binding protein-1 interactions mediates an anti-inflammatory response and halts fibrogenesis.
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Affiliation(s)
- Sabine Brandt
- Clinic of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Germany
| | - Peter R Mertens
- Clinic of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Germany.
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11
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Hasan AA, von Websky K, Reichetzeder C, Tsuprykov O, Gaballa MMS, Guo J, Zeng S, Delić D, Tammen H, Klein T, Kleuser B, Hocher B. Mechanisms of GLP-1 receptor-independent renoprotective effects of the dipeptidyl peptidase type 4 inhibitor linagliptin in GLP-1 receptor knockout mice with 5/6 nephrectomy. Kidney Int 2019; 95:1373-1388. [PMID: 30979564 DOI: 10.1016/j.kint.2019.01.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 01/14/2019] [Accepted: 01/17/2019] [Indexed: 01/01/2023]
Abstract
Dipeptidyl peptidase type 4 (DPP-4) inhibitors were reported to have beneficial effects in experimental models of chronic kidney disease. The underlying mechanisms are not completely understood. However, these effects could be mediated via the glucagon-like peptide-1 (GLP-1)/GLP-1 receptor (GLP1R) pathway. Here we investigated the renal effects of the DPP-4 inhibitor linagliptin in Glp1r-/- knock out and wild-type mice with 5/6 nephrectomy (5/6Nx). Mice were allocated to groups: sham+wild type+placebo; 5/6Nx+ wild type+placebo; 5/6Nx+wild type+linagliptin; sham+knock out+placebo; 5/6Nx+knock out+ placebo; 5/6Nx+knock out+linagliptin. 5/6Nx caused the development of renal interstitial fibrosis, significantly increased plasma cystatin C and creatinine levels and suppressed renal gelatinase/collagenase, matrix metalloproteinase-1 and -13 activities; effects counteracted by linagliptin treatment in wildtype and Glp1r-/- mice. Two hundred ninety-eight proteomics signals were differentially regulated in kidneys among the groups, with 150 signals specific to linagliptin treatment as shown by mass spectrometry. Treatment significantly upregulated three peptides derived from collagen alpha-1(I), thymosin β4 and heterogeneous nuclear ribonucleoprotein A1 (HNRNPA1) and significantly downregulated one peptide derived from Y box binding protein-1 (YB-1). The proteomics results were further confirmed using western blot and immunofluorescence microscopy. Also, 5/6Nx led to significant up-regulation of renal transforming growth factor-β1 and pSMAD3 expression in wild type mice and linagliptin significantly counteracted this up-regulation in wild type and Glp1r-/- mice. Thus, the renoprotective effects of linagliptin cannot solely be attributed to the GLP-1/GLP1R pathway, highlighting the importance of other signaling pathways (collagen I homeostasis, HNRNPA1, YB-1, thymosin β4 and TGF-β1) influenced by DPP-4 inhibition.
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Affiliation(s)
- Ahmed A Hasan
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany; Institute of Nutritional Sciences, University of Potsdam, Potsdam, Germany; Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt; UP Transfer GmbH, University of Potsdam, Potsdam, Germany
| | - Karoline von Websky
- Institute of Nutritional Sciences, University of Potsdam, Potsdam, Germany; Center for Cardiovascular Research, Charité, Berlin, Germany
| | - Christoph Reichetzeder
- Institute of Nutritional Sciences, University of Potsdam, Potsdam, Germany; UP Transfer GmbH, University of Potsdam, Potsdam, Germany; Center for Cardiovascular Research, Charité, Berlin, Germany
| | - Oleg Tsuprykov
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany; Center for Cardiovascular Research, Charité, Berlin, Germany; IFLB GmbH, Institute for Laboratory Medicine, Berlin, Germany
| | - Mohamed M S Gaballa
- Institute of Nutritional Sciences, University of Potsdam, Potsdam, Germany; Faculty of Veterinary Medicine, Benha University, Toukh, Egypt
| | - Jingli Guo
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Shufei Zeng
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Denis Delić
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | | | - Thomas Klein
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Burkhard Kleuser
- Institute of Nutritional Sciences, University of Potsdam, Potsdam, Germany
| | - Berthold Hocher
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany; LADR GmbH Neuruppin MVZ, Neuruppin, Germany; Department of Basic Medicine, Medical college of Hunan Normal University, Changsha, China.
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12
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Martínez-Martínez S, Lozano-Vidal N, López-Maderuelo MD, Jiménez-Borreguero LJ, Armesilla ÁL, Redondo JM. Cardiomyocyte calcineurin is required for the onset and progression of cardiac hypertrophy and fibrosis in adult mice. FEBS J 2018; 286:46-65. [PMID: 30548183 DOI: 10.1111/febs.14718] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/03/2018] [Indexed: 12/19/2022]
Abstract
Previous studies have demonstrated that activation of calcineurin induces pathological cardiac hypertrophy (CH). In these studies, loss-of-function was mostly achieved by systemic administration of the calcineurin inhibitor cyclosporin A. The lack of conditional knockout models for calcineurin function has impeded progress toward defining the role of this protein during the onset and the development of CH in adults. Here, we exploited a mouse model of CH based on the infusion of a hypertensive dose of angiotensin II (AngII) to model the role of calcineurin in CH in adulthood. AngII-induced CH in adult mice was reduced by treatment with cyclosporin A, without affecting the associated increase in blood pressure, and also by induction of calcineurin deletion in adult mouse cardiomyocytes, indicating that cardiomyocyte calcineurin is required for AngII-induced CH. Surprisingly, cardiac-specific deletion of calcineurin, but not treatment of mice with cyclosporin A, significantly reduced AngII-induced cardiac fibrosis and apoptosis. Analysis of profibrotic genes revealed that AngII-induced expression of Tgfβ family members and Lox was not inhibited by cyclosporin A but was markedly reduced by cardiac-specific calcineurin deletion. These results show that AngII induces a direct, calcineurin-dependent prohypertrophic effect in cardiomyocytes, as well as a systemic hypertensive effect that is independent of calcineurin activity.
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Affiliation(s)
- Sara Martínez-Martínez
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain.,Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Noelia Lozano-Vidal
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - María Dolores López-Maderuelo
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain.,Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Luis J Jiménez-Borreguero
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), Spain.,Hospital de La Princesa, Madrid, Spain
| | - Ángel Luis Armesilla
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), Spain.,Research Institute in Healthcare Science, School of Pharmacy, Faculty of Science and Engineering, University of Wolverhampton, UK
| | - Juan Miguel Redondo
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain.,Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), Spain
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13
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Lindquist JA, Mertens PR. Cold shock proteins: from cellular mechanisms to pathophysiology and disease. Cell Commun Signal 2018; 16:63. [PMID: 30257675 PMCID: PMC6158828 DOI: 10.1186/s12964-018-0274-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 09/13/2018] [Indexed: 12/21/2022] Open
Abstract
Cold shock proteins are multifunctional RNA/DNA binding proteins, characterized by the presence of one or more cold shock domains. In humans, the best characterized members of this family are denoted Y-box binding proteins, such as Y-box binding protein-1 (YB-1). Biological activities range from the regulation of transcription, splicing and translation, to the orchestration of exosomal RNA content. Indeed, the secretion of YB-1 from cells via exosomes has opened the door to further potent activities. Evidence links a skewed cold shock protein expression pattern with cancer and inflammatory diseases. In this review the evidence for a causative involvement of cold shock proteins in disease development and progression is summarized. Furthermore, the potential application of cold shock proteins for diagnostics and as targets for therapy is elucidated.
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Affiliation(s)
- Jonathan A Lindquist
- Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
| | - Peter R Mertens
- Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany.
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14
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YB-1 increases glomerular, but decreases interstitial fibrosis in CNI-induced nephropathy. Clin Immunol 2018; 194:67-74. [DOI: 10.1016/j.clim.2018.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/02/2018] [Indexed: 12/14/2022]
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15
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Wang J, Djudjaj S, Gibbert L, Lennartz V, Breitkopf DM, Rauen T, Hermert D, Martin IV, Boor P, Braun GS, Floege J, Ostendorf T, Raffetseder U. YB-1 orchestrates onset and resolution of renal inflammation via IL10 gene regulation. J Cell Mol Med 2017; 21:3494-3505. [PMID: 28664613 PMCID: PMC5706504 DOI: 10.1111/jcmm.13260] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 04/28/2017] [Indexed: 12/24/2022] Open
Abstract
The Y‐box‐binding protein (YB)‐1 plays a non‐redundant role in both systemic and local inflammatory response. We analysed YB‐1‐mediated expression of the immune regulatory cytokine IL‐10 in both LPS and sterile inflammation induced by unilateral renal ischaemia–reperfusion (I/R) and found an important role of YB‐1 not only in the onset but also in the resolution of inflammation in kidneys. Within a decisive cis‐regulatory region of the IL10 gene locus, the fourth intron, we identified and characterized an operative YB‐1 binding site via gel shift experiments and reporter assays in immune and different renal cells. In vivo, YB‐1 phosphorylated at serine 102 localized to the fourth intron, which was paralleled by enhanced IL‐10 mRNA expression in mice following LPS challenge and in I/R. Mice with half‐maximal expression of YB‐1 (Yb1+/−) had diminished IL‐10 expression upon LPS challenge. In I/R, Yb1+/− mice exhibited ameliorated kidney injury/inflammation in the early‐phase (days 1 and 5), however showed aggravated long‐term damage (day 21) with increased expression of IL‐10 and other known mediators of renal injury and inflammation. In conclusion, these data support the notion that there are context‐specific decisions concerning YB‐1 function and that a fine‐tuning of YB‐1, for example, via a post‐translational modification regulates its activity and/or localization that is crucial for systemic processes such as inflammation.
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Affiliation(s)
- Jialin Wang
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Sonja Djudjaj
- Institute of Pathology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Lydia Gibbert
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Vera Lennartz
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Daniel M Breitkopf
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Thomas Rauen
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Daniela Hermert
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Ina V Martin
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Peter Boor
- Institute of Pathology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Gerald S Braun
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Jürgen Floege
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Tammo Ostendorf
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Ute Raffetseder
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
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16
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Inflammatory cell infiltration and resolution of kidney inflammation is orchestrated by the cold-shock protein Y-box binding protein-1. Kidney Int 2017; 92:1157-1177. [PMID: 28610763 DOI: 10.1016/j.kint.2017.03.035] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 03/01/2017] [Accepted: 03/23/2017] [Indexed: 11/22/2022]
Abstract
Tubular cells recruit monocytic cells in inflammatory tubulointerstitial kidney diseases. The cell-cell communication that establishes pro- or anti-inflammatory activities is mainly influenced by cytokines, reactive oxygen species, nitric oxide, and phagocytosis. Key proteins orchestrating these processes such as cold-shock proteins linked with chemoattraction and cell maturation have been identified. The prototypic member of the cold-shock protein family, Y-box binding protein (YB)-1, governs specific phenotypic alterations in monocytic cells and was explored in the present study. Following tubulointerstitial injury by unilateral ureteral obstruction, increased inflammatory cell infiltration and tubular cell CCL5 expression was found in conditional Ybx1 knockout animals with specific depletion in monocytes/macrophages (YB-1ΔLysM). Furthermore, YB-1ΔLysM mice exhibit enhanced tissue damage, myofibroblast activation, and fibrosis. To investigate relevant molecular mechanism(s), we utilized bone marrow-derived macrophage cultures and found that YB-1-deficient macrophages display defects in cell polarization and function, including reduced proliferation and nitric oxide production, loss of phagocytic activity, and failure to upregulate IL-10 and CCL5 expression in response to inflammatory stimuli. Co-culture with primary tubular cells confirmed these findings. Thus, monocytic YB-1 has prominent and distinct roles for cellular feed-forward crosstalk and resolution of inflammatory processes by its ability to regulate cell differentiation and cytokine/chemokine synthesis.
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17
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Xiong P, Zhang J, Xu D, Zhu J, Li W, Liu J, Liu F. Positive feedback loop of YB-1 interacting with Smad2 promotes liver fibrosis. Biochem Biophys Res Commun 2017; 484:753-761. [PMID: 28153731 DOI: 10.1016/j.bbrc.2017.01.148] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 01/26/2017] [Indexed: 12/15/2022]
Abstract
Y-box binding protein (YB-1), known as a multifunctional cellular protein in various biological processes, was recently reported to be associated with liver fibrosis. The critical role of TGF-β/Smad signaling pathway in stimulating the transcription of fibrotic genes in fibroblasts have already been identified, however, whether and how YB-1 modulated liver fibrosis via TGF-β/Smad signaling pathway remains largely unknown. In our previous study, we proved that ectopic TGF-β was associated with YB-1 expression. Herein, by combining in vitro experiments in LX2 human hepatic stellate cells and in vivo studies by building CCl4 based mice liver fibrosis model, we showed that YB-1 and p-YB-1 were upregulated in liver fibrosis tissue, and YB-1 promoted the deposition of excess extracellular matrix. Mechanistically, Smad2, a key member in TGF-β signaling pathway, acted as a transcription factor that triggered YB-1 promoter, while on the other hand, p-YB-1 stabilized Smad2 by attenuating its ubiquitination. Knockdown of Smad2 could reduce YB-1 expression, which in turn shorter the half time of Smad2. Furthermore, the serine102 residue of YB-1 both affected its binding and stabilizing activity to Smad2. These finding demonstrated that YB-1 and Smad2 played as a positive feedback loop in promoting liver fibrosis. In conclusion, TGF-β signaling pathway may influence liver fibrosis by incorporating with YB-1, indicating that YB-1 could be a potential target for therapies against liver fibrosis.
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Affiliation(s)
- Panpan Xiong
- Department of Digestive Diseases, Shanghai East Hospital, Tongji University, Shanghai 200120, PR China
| | - Jun Zhang
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Diannan Xu
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Jie Zhu
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Wenshuai Li
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Jie Liu
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, PR China.
| | - Fei Liu
- Department of Digestive Diseases, Shanghai East Hospital, Tongji University, Shanghai 200120, PR China.
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18
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Wang J, Gibbert L, Djudjaj S, Alidousty C, Rauen T, Kunter U, Rembiak A, Enders D, Jankowski V, Braun GS, Floege J, Ostendorf T, Raffetseder U. Therapeutic nuclear shuttling of YB-1 reduces renal damage and fibrosis. Kidney Int 2016; 90:1226-1237. [PMID: 27591085 DOI: 10.1016/j.kint.2016.07.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/30/2016] [Accepted: 07/07/2016] [Indexed: 12/15/2022]
Abstract
Virtually all chronic kidney diseases progress towards tubulointerstitial fibrosis. In vitro, Y-box protein-1 (YB-1) acts as a central regulator of gene transcription and translation of several fibrosis-related genes. However, it remains to be determined whether its pro- or antifibrotic propensities prevail in disease. Therefore, we investigated the outcome of mice with half-maximal YB-1 expression in a model of renal fibrosis induced by unilateral ureteral obstruction. Yb1+/- animals displayed markedly reduced tubular injury, immune cell infiltration and renal fibrosis following ureteral obstruction. The increase in renal YB-1 was limited to a YB-1 variant nonphosphorylated at serine 102 but phosphorylated at tyrosine 99. During ureteral obstruction, YB-1 localized to the cytoplasm, directly stabilizing Col1a1 mRNA, thus promoting fibrosis. Conversely, the therapeutic forced nuclear compartmentalization of phosphorylated YB-1 by the small molecule HSc025 mediated repression of the Col1a1 promoter and attenuated fibrosis following ureteral obstruction. Blunting of these effects in Yb1+/- mice confirmed involvement of YB-1. HSc025 even reduced tubulointerstitial damage when applied at later time points during maximum renal damage. Thus, phosphorylation and subcellular localization of YB-1 determines its effect on renal fibrosis in vivo. Hence, induced nuclear YB-1 shuttling may be a novel antifibrotic treatment strategy in renal diseases with the potential of damage reversal.
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Affiliation(s)
- Jialin Wang
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Lydia Gibbert
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Sonja Djudjaj
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Christina Alidousty
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Thomas Rauen
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Uta Kunter
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Andreas Rembiak
- Institute of Organic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Vera Jankowski
- Institute of Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
| | - Gerald S Braun
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Jürgen Floege
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Tammo Ostendorf
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany
| | - Ute Raffetseder
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Aachen, Germany.
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19
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Bobkova NV, Lyabin DN, Medvinskaya NI, Samokhin AN, Nekrasov PV, Nesterova IV, Aleksandrova IY, Tatarnikova OG, Bobylev AG, Vikhlyantsev IM, Kukharsky MS, Ustyugov AA, Polyakov DN, Eliseeva IA, Kretov DA, Guryanov SG, Ovchinnikov LP. The Y-Box Binding Protein 1 Suppresses Alzheimer's Disease Progression in Two Animal Models. PLoS One 2015; 10:e0138867. [PMID: 26394155 PMCID: PMC4578864 DOI: 10.1371/journal.pone.0138867] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 09/05/2015] [Indexed: 11/25/2022] Open
Abstract
The Y-box binding protein 1 (YB-1) is a member of the family of DNA- and RNA binding proteins. It is involved in a wide variety of DNA/RNA-dependent events including cell proliferation and differentiation, stress response, and malignant cell transformation. Previously, YB-1 was detected in neurons of the neocortex and hippocampus, but its precise role in the brain remains undefined. Here we show that subchronic intranasal injections of recombinant YB-1, as well as its fragment YB-11−219, suppress impairment of spatial memory in olfactory bulbectomized (OBX) mice with Alzheimer’s type degeneration and improve learning in transgenic 5XFAD mice used as a model of cerebral amyloidosis. YB-1-treated OBX and 5XFAD mice showed a decreased level of brain β-amyloid. In OBX animals, an improved morphological state of neurons was revealed in the neocortex and hippocampus; in 5XFAD mice, a delay in amyloid plaque progression was observed. Intranasally administered YB-1 penetrated into the brain and could enter neurons. In vitro co-incubation of YB-1 with monomeric β-amyloid (1–42) inhibited formation of β-amyloid fibrils, as confirmed by electron microscopy. This suggests that YB-1 interaction with β-amyloid prevents formation of filaments that are responsible for neurotoxicity and neuronal death. Our data are the first evidence for a potential therapeutic benefit of YB-1 for treatment of Alzheimer’s disease.
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MESH Headings
- Alzheimer Disease/genetics
- Alzheimer Disease/physiopathology
- Alzheimer Disease/prevention & control
- Amyloid beta-Peptides/metabolism
- Amyloid beta-Peptides/pharmacology
- Animals
- Animals, Newborn
- Brain/drug effects
- Brain/metabolism
- Brain/pathology
- Cells, Cultured
- Disease Models, Animal
- Disease Progression
- Electrophoresis, Polyacrylamide Gel
- Humans
- Immunohistochemistry
- Male
- Maze Learning/drug effects
- Mice, Inbred C57BL
- Mice, Inbred Strains
- Mice, Transgenic
- Microscopy, Confocal
- Neurons/drug effects
- Neurons/metabolism
- Olfactory Bulb/surgery
- Peptide Fragments/pharmacology
- Plaque, Amyloid/metabolism
- Plaque, Amyloid/prevention & control
- Rats
- Recombinant Proteins/pharmacology
- Y-Box-Binding Protein 1/chemistry
- Y-Box-Binding Protein 1/genetics
- Y-Box-Binding Protein 1/pharmacology
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Affiliation(s)
- N. V. Bobkova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - D. N. Lyabin
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | | | - A. N. Samokhin
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - P. V. Nekrasov
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - I. V. Nesterova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | | | | | - A. G. Bobylev
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - I. M. Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - M. S. Kukharsky
- Institute of Physiologically Active Compounds, RAS, Chernogolovka, Moscow Region, Russia
| | - A. A. Ustyugov
- Institute of Physiologically Active Compounds, RAS, Chernogolovka, Moscow Region, Russia
| | - D. N. Polyakov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - I. A. Eliseeva
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - D. A. Kretov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - S. G. Guryanov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - L. P. Ovchinnikov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
- * E-mail:
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20
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Alidousty C, Rauen T, Hanssen L, Wang Q, Alampour-Rajabi S, Mertens PR, Bernhagen J, Floege J, Ostendorf T, Raffetseder U. Calcineurin-mediated YB-1 dephosphorylation regulates CCL5 expression during monocyte differentiation. J Biol Chem 2014; 289:21401-12. [PMID: 24947514 DOI: 10.1074/jbc.m114.562991] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Y-box (YB) protein-1 serves as a master regulator in gene transcription and mRNA translation. YB-1 itself is regulated at various levels, e.g. through post-translational modifications. In our previous work, we identified RANTES/CCL5 as a transcriptional target of YB-1. We previously demonstrated that YB-1 protein is transiently up-regulated during monocyte/macrophage differentiation evidenced in monocytic cells (THP-1 cells) that were differentiated using phorbol myristate acetate (PMA). Here we provide evidence that YB-1 phosphorylation, specifically at its serine residue 102 (Ser-102), increases early on in THP-1 cells following PMA treatment as well as in differentiated primary human monocytes. This process is mediated through the Akt signaling pathway. Ser-102-phosphorylated YB-1 displays stronger binding affinity and trans-activating capacity at the CCL5 gene promoter. Notably, Ser-102-phosphorylated YB-1 disappears at later stages of the monocyte/macrophage differentiation process. We demonstrate that serine-threonine phosphatase calcineurin (CN) dephosphorylates YB-1 preventing it from binding to and trans-activating the CCL5 promoter. Co-immunoprecipitation assays prove a direct YB-1/CN interaction. Furthermore, analyses in kidney tissues from mice that were treated with the CN inhibitor cyclosporine A revealed an in vivo effect of CN on the YB-1 phosphorylation status. We conclude that YB-1 phosphorylation at Ser-102 is an important prerequisite for CCL5 promoter activation during macrophage differentiation. Our findings point to a critical role of YB-1 in the resolution of inflammatory processes which may largely be due to CN-mediated dephosphorylation.
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Affiliation(s)
- Christina Alidousty
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
| | - Thomas Rauen
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
| | - Lydia Hanssen
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
| | - Qiang Wang
- the Department of Rheumatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Setareh Alampour-Rajabi
- the Department of Cell and Molecular Biology, Institute of Biochemistry and Molecular Cell Biology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany, and
| | - Peter R Mertens
- the Department of Nephrology, Hypertension, Diabetes, and Endocrinology, Otto-von-Guericke-University, 39120 Magdeburg, Germany
| | - Jürgen Bernhagen
- the Department of Cell and Molecular Biology, Institute of Biochemistry and Molecular Cell Biology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany, and
| | - Jürgen Floege
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
| | - Tammo Ostendorf
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
| | - Ute Raffetseder
- From the Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany,
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21
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Willis WL, Hariharan S, David JJ, Strauch AR. Transglutaminase-2 mediates calcium-regulated crosslinking of the Y-box 1 (YB-1) translation-regulatory protein in TGFβ1-activated myofibroblasts. J Cell Biochem 2014; 114:2753-69. [PMID: 23804301 DOI: 10.1002/jcb.24624] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 06/25/2013] [Indexed: 01/23/2023]
Abstract
Myofibroblast differentiation is required for wound healing and accompanied by activation of smooth muscle α-actin (SMαA) gene expression. The stress-response protein, Y-box binding protein-1 (YB-1) binds SMαA mRNA and regulates its translational activity. Activation of SMαA gene expression in human pulmonary myofibroblasts by TGFβ1 was associated with formation of denaturation-resistant YB-1 oligomers with selective affinity for a known translation-silencer sequence in SMαA mRNA. We have determined that YB-1 is a substrate for the protein-crosslinking enzyme transglutaminase 2 (TG2) that catalyzes calcium-dependent formation of covalent γ-glutamyl-isopeptide linkages in response to reactive oxygen signaling. TG2 transamidation reactions using intact cells, cell lysates, and recombinant YB-1 revealed covalent crosslinking of the 50 kDa YB-1 polypeptide into protein oligomers that were distributed during SDS-PAGE over a 75-250 kDa size range. In vitro YB-1 transamidation required nanomolar levels of calcium and was enhanced by the presence of SMαA mRNA. In human pulmonary fibroblasts, YB-1 crosslinking was inhibited by (a) anti-oxidant cystamine, (b) the reactive-oxygen antagonist, diphenyleneiodonium, (c) competitive inhibition of TG2 transamidation using the aminyl-surrogate substrate, monodansylcadaverine, and (d) transfection with small-interfering RNA specific for human TG2 mRNA. YB-1 crosslinking was partially reversible as a function of oligomer-substrate availability and TG2 enzyme concentration. Intracellular calcium accumulation and peroxidative stress in injury-activated myofibroblasts may govern SMαA mRNA translational activity during wound healing via TG2-mediated crosslinking of the YB-1 mRNA-binding protein.
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Affiliation(s)
- William L Willis
- Department of Physiology and Cell Biology, The Integrated Biomedical Sciences Graduate Program, and the Ohio State Biochemistry Program, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, 43210
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22
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Klinkhammer BM, Kramann R, Mallau M, Makowska A, van Roeyen CR, Rong S, Buecher EB, Boor P, Kovacova K, Zok S, Denecke B, Stuettgen E, Otten S, Floege J, Kunter U. Mesenchymal stem cells from rats with chronic kidney disease exhibit premature senescence and loss of regenerative potential. PLoS One 2014; 9:e92115. [PMID: 24667162 PMCID: PMC3965415 DOI: 10.1371/journal.pone.0092115] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 02/17/2014] [Indexed: 12/14/2022] Open
Abstract
Mesenchymal stem cell (MSC) transplantation has the potential for organ repair. Nevertheless, some factors might lessen the regenerative potential of MSCs, e.g. donor age or systemic disease. It is thus important to carefully assess the patient's suitability for autologous MSC transplantation. Here we investigated the effects of chronic kidney disease (CKD) on MSC function. We isolated bone marrow MSCs from remnant kidney rats (RK) with CKD (CKD-RK-MSC) and found signs of premature senescence: spontaneous adipogenesis, reduced proliferation capacity, active senescence-associated-β-galactosidase, accumulation of actin and a modulated secretion profile. The functionality of CKD-RK-MSCs in vivo was tested in rats with acute anti-Thy1.1-nephritis, where healthy MSCs have been shown to be beneficial. Rats received healthy MSCs, CKD-RK-MSC or medium by injection into the left renal artery. Kidneys receiving healthy MSCs exhibited accelerated healing of glomerular lesions, whereas CKD-RK-MSC or medium exerted no benefit. The negative influence of advanced CKD/uremia on MSCs was confirmed in a second model of CKD, adenine nephropathy (AD). MSCs from rats with adenine nephropathy (CKD-AD-MSC) also exhibited cellular modifications and functional deficits in vivo. We conclude that CKD leads to a sustained loss of in vitro and in vivo functionality in MSCs, possibly due to premature cellular senescence. Considering autologous MSC therapy in human renal disease, studies identifying uremia-associated mechanisms that account for altered MSC function are urgently needed.
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Affiliation(s)
| | - Rafael Kramann
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Monika Mallau
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Anna Makowska
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | | | - Song Rong
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Eva Bettina Buecher
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Peter Boor
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
- Institute of Pathology, RWTH Aachen University Hospital, Aachen, Germany
- Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia
| | - Katarina Kovacova
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Stephanie Zok
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Bernd Denecke
- Interdisciplinary Centre for Clinical Research, RWTH Aachen University Hospital, Aachen, Germany
| | - Esther Stuettgen
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Simon Otten
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Juergen Floege
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Uta Kunter
- Division of Nephrology and Immunology, RWTH Aachen University Hospital, Aachen, Germany
- * E-mail:
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23
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Lindquist JA, Brandt S, Bernhardt A, Zhu C, Mertens PR. The role of cold shock domain proteins in inflammatory diseases. J Mol Med (Berl) 2014; 92:207-16. [PMID: 24562821 DOI: 10.1007/s00109-014-1136-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 01/17/2014] [Accepted: 02/10/2014] [Indexed: 12/15/2022]
Abstract
Cold shock domain proteins are characterized by the presence of one or more evolutionarily conserved cold shock domains, which each possess two nucleic acid-binding motifs. These proteins exert pleiotropic functions in cells via their ability to bind single-stranded RNA and/or DNA, thus allowing them to serve as transcriptional as well as translational regulators. Not only can they regulate their own expression, but they also regulate the expression of a number of pro- and anti-inflammatory cytokines, as well as cytokine receptors, making them key players in the orchestration of inflammatory processes and immune cell phenotypes. To add to their complexity, the expression of cold shock domain proteins is induced by cellular stress. At least one cold shock domain protein is actively secreted and binds to specific cell surface receptors, thereby influencing the proliferative and migratory capacity of the cell. The presence of cold shock domain proteins in the blood and/or urine of patients with cancer or inflammatory disease, as well as the identification of autoantibodies directed against these proteins make them potential targets of therapeutic interest.
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Affiliation(s)
- Jonathan A Lindquist
- Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
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Pullmann R, Rabb H. HuR and other turnover- and translation-regulatory RNA-binding proteins: implications for the kidney. Am J Physiol Renal Physiol 2014; 306:F569-76. [PMID: 24431206 DOI: 10.1152/ajprenal.00270.2013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The posttranscriptional regulation of gene expression occurs through cis RNA regulatory elements by the action of trans factors, which are represented by noncoding RNAs (especially microRNAs) and turnover- and translation-regulatory (TTR) RNA-binding proteins (RBPs). These multifactorial proteins are a group of heterogeneous RBPs primarily implicated in controlling the decay and translation rates of target mRNAs. TTR-RBPs usually shuttle between cellular compartments (the nucleus and cytoplasm) in response to various stimuli and undergo posttranslational modifications such as phosphorylation or methylation to ensure their proper subcellular localization and function. TTR-RBPs are emerging as key regulators of a wide variety of genes influencing kidney physiology and pathology. This review summarizes the current knowledge of TTR-RBPs that influence renal metabolism. We will discuss the role of TTR-RBPs as regulators of kidney ischemia, fibrosis and matrix remodeling, angiogenesis, membrane transport, immunity, vascular tone, hypertension, and acid-base balance as well as anemia, bone mineral disease, and vascular calcification.
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25
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Shiota M, Kashiwagi E, Yokomizo A, Takeuchi A, Dejima T, Song Y, Tatsugami K, Inokuchi J, Uchiumi T, Naito S. Interaction between docetaxel resistance and castration resistance in prostate cancer: implications of Twist1, YB-1, and androgen receptor. Prostate 2013; 73:1336-44. [PMID: 23775496 DOI: 10.1002/pros.22681] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 04/08/2013] [Indexed: 12/13/2022]
Abstract
BACKGROUND Taxanes, including docetaxel, are currently the only cytotoxic chemotherapeutic agents proven to confer survival benefit in patients with castration-resistant prostate cancer (CRPC). However, the merits of taxanes remain modest, and efforts are needed to improve their therapeutic efficacy. METHODS We evaluated the sensitivity of prostate cancer cells to various agents using cytotoxicity assays. Gene and protein expression levels were evaluated by quantitative real-time polymerase chain reaction and Western blotting analysis, respectively. RESULTS Hydrogen peroxide-resistant and castration-resistant cells that overexpressed Twist1 and Y-box binding protein-1 (YB-1) were cross-resistant to cytotoxic agents, including docetaxel. Twist1 regulated YB-1 expression in prostate cancer cells, supported by the induction of Twist1 and YB-1 by transforming-growth factor-β, which is critical for taxane resistance. Twist1 and/or YB-1 were activated in docetaxel-resistant prostate cancer cells, and YB-1 was activated by docetaxel treatment. Conversely, Twist1 and YB-1 knockdown sensitized prostate cancer cells to cytotoxic agents, including docetaxel. In addition, androgen receptor (AR) knockdown increased cellular sensitivity to docetaxel, though AR expression in docetaxel-resistant LNCaP cells was paradoxically lower than in parental cells. Intriguingly, androgen deprivation treatment was more effective in docetaxel-resistant LNCaP cells compared with parental cells. CONCLUSIONS Twist1/YB-1 and AR signaling promote docetaxel resistance in CRPC cells. However, docetaxel-resistant cells were collaterally sensitive to androgen deprivation because of down-regulation of AR expression, suggesting that the therapeutic effect of initial taxane treatment in hormone-naïve prostate cancer may be superior to that of salvage taxane treatment in CRPC.
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Affiliation(s)
- Masaki Shiota
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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26
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van Roeyen CRC, Scurt FG, Brandt S, Kuhl VA, Martinkus S, Djudjaj S, Raffetseder U, Royer HD, Stefanidis I, Dunn SE, Dooley S, Weng H, Fischer T, Lindquist JA, Mertens PR. Cold shock Y-box protein-1 proteolysis autoregulates its transcriptional activities. Cell Commun Signal 2013; 11:63. [PMID: 24103640 PMCID: PMC3766096 DOI: 10.1186/1478-811x-11-63] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 08/12/2013] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The Y-box protein-1 (YB-1) fulfills pleiotropic functions relating to gene transcription, mRNA processing, and translation. It remains elusive how YB-1 shuttling into the nuclear and cytoplasmic compartments is regulated and whether limited proteolysis by the 20S proteasome releases fragments with distinct function(s) and subcellular distribution(s). RESULTS To address these questions, mapping of domains responsible for subcellular targeting was performed. Three nuclear localization signals (NLS) were identified. NLS-1 (aa 149-156) and NLS-2 (aa 185-194) correspond to residues with unknown function(s), whereas NLS-3 (aa 276-292) matches with a designated multimerization domain. Nuclear export signal(s) were not identified. Endoproteolytic processing by the 20S proteasome before glycine 220 releases a carboxy-terminal fragment (CTF), which localized to the nucleus, indicating that NLS-3 is operative. Genotoxic stress induced proteolytic cleavage and nuclear translocation of the CTF. Co-expression of the CTF and full-length YB-1 resulted in an abrogated transcriptional activation of the MMP-2 promoter, indicating an autoregulatory inhibitory loop, whereas it fulfilled similar trans-repressive effects on the collagen type I promoter. CONCLUSION Compartmentalization of YB-1 protein derivatives is controlled by distinct NLS, one of which targets a proteolytic cleavage product to the nucleus. We propose a model for an autoregulatory negative feedback loop that halts unlimited transcriptional activation.
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Affiliation(s)
- Claudia R C van Roeyen
- Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str 44, 39120 Magdeburg, Germany.
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27
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Hanssen L, Alidousty C, Djudjaj S, Frye BC, Rauen T, Boor P, Mertens PR, van Roeyen CR, Tacke F, Heymann F, Tittel AP, Koch A, Floege J, Ostendorf T, Raffetseder U. YB-1 is an early and central mediator of bacterial and sterile inflammation in vivo. THE JOURNAL OF IMMUNOLOGY 2013; 191:2604-13. [PMID: 23872051 DOI: 10.4049/jimmunol.1300416] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In vitro studies identified Y-box-binding protein (YB)-1 as a key regulator of inflammatory mediators. In this study, we observed increased levels of secreted YB-1 in sera from sepsis patients. This led us to investigate the in vivo role of YB-1 in murine models of acute peritonitis following LPS injection, in sterile renal inflammation following unilateral ureteral obstruction, and in experimental pyelonephritis. LPS injection enhanced de novo secretion of YB-1 into the urine and the peritoneal fluid of LPS-treated mice. Furthermore, we could demonstrate a significant, transient upregulation and posttranslational modification (phosphorylation at serine 102) of YB-1 in renal and inflammatory cells. Increased renal cytoplasmic YB-1 amounts conferred enhanced expression of proinflammatory chemokines CCL2 and CCL5. Along these lines, heterozygous YB-1 knockout mice (YB-1(+/d)) that display 50% reduced YB-1 levels developed significantly lower responses to both LPS and sterile inflammation induced by unilateral ureteral obstruction. This included diminished immune cell numbers due to impaired migration propensities and reduced chemokine expression. YB-1(+/d) mice were protected from LPS-associated mortality (20% mortality on day 3 versus 80% in wild-type controls); however, immunosuppression in YB-1(+/d) animals resulted in 50% mortality. In conclusion, our findings identify YB-1 as a major, nonredundant mediator in both systemic and local inflammatory responses.
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Affiliation(s)
- Lydia Hanssen
- Division of Nephrology and Clinical Immunology, University Hospital Rheinisch-Westfaelische Technische Hochschule-Aachen, 52057 Aachen, Germany
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28
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Strauch AR, Hariharan S. Dynamic Interplay of Smooth Muscle α-Actin Gene-Regulatory Proteins Reflects the Biological Complexity of Myofibroblast Differentiation. BIOLOGY 2013; 2:555-86. [PMID: 24832798 PMCID: PMC3960882 DOI: 10.3390/biology2020555] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/01/2013] [Accepted: 03/06/2013] [Indexed: 01/06/2023]
Abstract
Myofibroblasts (MFBs) are smooth muscle-like cells that provide contractile force required for tissue repair during wound healing. The leading agonist for MFB differentiation is transforming growth factor β1 (TGFβ1) that induces transcription of genes encoding smooth muscle α-actin (SMαA) and interstitial collagen that are markers for MFB differentiation. TGFβ1 augments activation of Smad transcription factors, pro-survival Akt kinase, and p38 MAP kinase as well as Wingless/int (Wnt) developmental signaling. These actions conspire to activate β-catenin needed for expression of cyclin D, laminin, fibronectin, and metalloproteinases that aid in repairing epithelial cells and their associated basement membranes. Importantly, β-catenin also provides a feed-forward stimulus that amplifies local TGFβ1 autocrine/paracrine signaling causing transition of mesenchymal stromal cells, pericytes, and epithelial cells into contractile MFBs. Complex, mutually interactive mechanisms have evolved that permit several mammalian cell types to activate the SMαA promoter and undergo MFB differentiation. These molecular controls will be reviewed with an emphasis on the dynamic interplay between serum response factor, TGFβ1-activated Smads, Wnt-activated β-catenin, p38/calcium-activated NFAT protein, and the RNA-binding proteins, Purα, Purβ, and YB-1, in governing transcriptional and translational control of the SMαA gene in injury-activated MFBs.
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Affiliation(s)
- Arthur Roger Strauch
- Department of Physiology & Cell Biology and the Ohio State Biochemistry Program, the Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University College of Medicine, Columbus, OH 43210, USA.
| | - Seethalakshmi Hariharan
- Department of Physiology & Cell Biology and the Ohio State Biochemistry Program, the Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University College of Medicine, Columbus, OH 43210, USA.
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Boor P. [New approaches in progressive kidney diseases]. DER PATHOLOGE 2012; 33 Suppl 2:296-301. [PMID: 22935783 DOI: 10.1007/s00292-012-1633-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Renal fibrosis, i.e. the replacement of functional tissue with scar tissue, represents the pathological correlate for chronic kidney disease (CKD). A great number of renal diseases lead to CKD and thereby to renal fibrosis. Therefore, renal fibrosis represents an excellent treatment option for patients with CKD. Here we discuss the problems with the preclinical identification and testing of potential factors and therapeutic approaches for renal fibrosis as well as obstacles in the translation of these results to clinical practice. We present the preclinical evidence for the role of novel molecules involved in renal fibrosis, e.g. platelet-derived growth factors (PDGF), C5a or peroxisome proliferator-activated receptor-α (PPAR-α).
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Affiliation(s)
- P Boor
- Institut für Pathologie, RWTH Universität Aachen, Pauwelsstr. 30, 52074 Aachen.
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The role of MAPK in drug-induced kidney injury. JOURNAL OF SIGNAL TRANSDUCTION 2012; 2012:463617. [PMID: 22523682 PMCID: PMC3317229 DOI: 10.1155/2012/463617] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 11/02/2011] [Accepted: 11/04/2011] [Indexed: 12/23/2022]
Abstract
This paper focuses on the role that mitogen-activated protein kinases (MAPKs) play in drug-induced kidney injury. The MAPKs, of which there are four major classes (ERK, p38, JNK, and ERK5/BMK), are signalling cascades which have been found to be broadly conserved across a wide variety of organisms. MAPKs allow effective transmission of information from the cell surface to the cytosolic or nuclear compartments. Cross talk between the MAPKs themselves and with other signalling pathways allows the cell to modulate responses to a wide variety of external stimuli. The MAPKs have been shown to play key roles in both mediating and ameliorating cellular responses to stress including xenobiotic-induced toxicity. Therefore, this paper will discuss the specific role of the MAPKs in the kidney in response to injury by a variety of xenobiotics and the potential for therapeutic intervention at the level of MAPK signalling across different types of kidney disease.
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Cyclosporin A and tacrolimus induce renal Erk1/2 pathway via ROS-induced and metalloproteinase-dependent EGF-receptor signaling. Biochem Pharmacol 2011; 83:286-95. [PMID: 22100870 DOI: 10.1016/j.bcp.2011.11.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 11/21/2022]
Abstract
We previously demonstrated that the widely used immunosuppressive drugs cyclosporin A (CsA) and tacrolimus (FK506), independent of immunophilin binding, can activate profibrogenic transforming growth factor β (TGFβ)/Smad signaling cascades in rat renal mesangial cells (MC). Here we report that both peptidyl-prolyl cis/trans isomerase (PPIase) inhibitors activate the extracellular-signaling regulated kinase (ERK) a member of the mitogen activated protein kinase (MAPK) and induce a rapid and transient increase in ERK phosphorylation. The MEK inhibitor U0126, the reactive oxygen species (ROS) scavenger N-acetyl-cysteine (NAC), a cell-permeant superoxide dismutase (SOD) and stigmatellin, an inhibitor of mitochondrial cytochrome bc1 complex strongly attenuated the increase in ERK1/2 phosphorylation triggered by PPIase inhibitors. Moreover, neutralizing antibodies against heparin binding-epidermal growth factor (HB-EGF), and inhibition of the EGF receptor by either small interfering (si)RNA or AG1478, demonstrate that ERK activation by both PPIase inhibitors is mediated via HB-EGF-induced EGF receptor (EGFR) tyrosine kinase activation. The strong inhibitory effects achieved by GM6001 and TAPI-2 furthermore implicate the involvement of a desintegrin and metalloproteinase 17 (ADAM17). Concomitantly, the PPIase inhibitor-induced ADAM17 secretase activity was significantly reduced by SOD and stigmatellin thus suggesting that mitochondrial ROS play a primary role in PPIase inhibitor-induced and ADAM17-mediated HB-EGF shedding. Functionally, both immunosuppressants caused a strong increase in MC proliferation which was similarly impeded when cells were treated in the presence of NAC, TAPI-2 or AG1478, respectively. Our data suggest that CsA and FK506, via ROS-dependent and ADAM17-catalyzed HB-EGF shedding induce the mitogenic ERK1/2 signaling cascade in renal MC.
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Raffetseder U, Liehn EA, Weber C, Mertens PR. Role of cold shock Y-box protein-1 in inflammation, atherosclerosis and organ transplant rejection. Eur J Cell Biol 2011; 91:567-75. [PMID: 21943779 DOI: 10.1016/j.ejcb.2011.07.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 07/05/2011] [Accepted: 07/08/2011] [Indexed: 12/14/2022] Open
Abstract
Chemokines (chemoattractant cytokines) are crucial regulators of immune cell extravasation from the bloodstream into inflamed tissue. Dysfunctional regulation and perpetuated chemokine gene expression are linked to progressive chronic inflammatory diseases and, in respect to transplanted organs, may trigger graft rejection. RANTES (regulated upon activation, normal T cell expressed and secreted (also known as CCL5)) is a model chemokine with relevance in numerous inflammatory diseases where the innate immune response predominates. Transcription factor Y-box binding protein-1 (YB-1) serves as a trans-regulator of CCL5 gene transcription in vascular smooth muscle cells and leucocytes. This review provides an update on YB-1 as a mediator of inflammatory processes and focuses on the role of YB-1 in CCL5 expression in diseases with monocytic cell infiltrates, albeit acute or chronic. Paradigms of such diseases encompass atherosclerosis and transplant rejection where cold shock protein YB-1 takes a dominant role in transcriptional regulation.
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Affiliation(s)
- Ute Raffetseder
- Department of Nephrology and Clinical Immunology, University Hospital RWTH-Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany.
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