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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mreich, Ellein Chen, Xin-Ming Zaky, Amgad Pollock, Carol A. Saad, Sonia |
| Description | Country affiliation: Australia Author Affiliation: Mreich E ( Department of Medicine, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.); Chen XM ( Department of Medicine, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.); Zaky A ( Department of Medicine, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.); Pollock CA ( Department of Medicine, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.); Saad S ( Department of Medicine, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.) |
| Abstract | Krüppel-like factor 4 (KLF4) is known to mitigate inflammation in several cell types. Using human proximal tubule cells, the present study aimed to investigate the role of KLF4 in regulating transforming growth factor (TGF)-ß1 induced inflammatory and fibrotic responses. Human kidney proximal tubular cells were exposed to high glucose, or TGF-ß1 and KLF4 expressions were determined. Cells were then transfected with empty vector or KLF4 and exposed to 2-ng/mL TGF-ß1 for up to 72 h. Inflammatory proteins (macrophage migration inhibitory factor and monocyte chemoattractant protein-1) and pro-fibrotic proteins (fibronectin and collagen IV) were measured after 72 h by enzyme-linked immunosorbent assay and western blot, respectively. To determine the relevance to in vivo models of chronic kidney disease, KLF4 protein expression in streptozotocin-induced diabetic mice was determined. Krüppel-like factor 4 messenger RNA (mRNA) levels were significantly reduced in high glucose-treated human kidney proximal tubular cells. High glucose increased TGF-ß1 mRNA expression, which significantly increased migration inhibitory factor and monocyte chemoattractant protein-1 protein secretion. Transforming growth factor-ß1 significantly increased fibronectin and collagen IV protein expression. The overexpression of KLF4 significantly reduced TGF-ß-mediated increases in migration inhibitory factor and monocyte chemoattractant protein-1 but had no effect on TGF-ß-mediated fibronectin and collagen IV mRNA and protein expression. The levels of KLF4 mRNA were significantly reduced in the diabetic kidney, and diabetic animals had a significant reduction in renal tubular expression of KLF4 proteins. This data suggest that KLF4 reduces inflammation induced by TGF-ß1, suggesting a therapeutic role for KLF4 in diabetic nephropathy. |
| File Format | HTM / HTML |
| ISSN | 03051870 |
| Issue Number | 6 |
| Volume Number | 42 |
| e-ISSN | 14401681 |
| Journal | Clinical and Experimental Pharmacology and Physiology |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2015-06-01 |
| Publisher Place | Australia |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Physiology Discipline Pharmacology Diabetes Mellitus, Experimental Chemically Induced Metabolism Kidney Tubules, Proximal Kruppel-like Transcription Factors Physiology Transforming Growth Factor Beta1 Toxicity Animals Cells, Cultured Pathology Fibrosis Humans Inflammation Mediators Drug Effects Mice Mice, Knockout Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Pharmacology |
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