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Renal fibrosis

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https://www.readbyqxmd.com/read/28432469/renal-findings-in-patients-with-mulibrey-nanism
#1
Johanna Sivunen, Susann Karlberg, Jouko Lohi, Niklas Karlberg, Marita Lipsanen-Nyman, Hannu Jalanko
BACKGROUND: Mulibrey nanism (MUL) is a rare inherited disease caused by genetic defects affecting peroxisomal TRIM37 protein. MUL affects multiple organs, leading to growth retardation and early onset type 2 diabetes. We aimed to characterize the structure and function of kidneys and the urinary tract in a large cohort of Finnish MUL patients. METHODS: Ultrasound, magnetic resonance imaging (MRI), and autopsy findings of the kidneys and urinary tract from 101 MUL patients were retrospectively analyzed...
April 22, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28430784/non-invasive-quantification-of-collagen-turnover-in-renal-transplant-recipients
#2
Elisabeth G D Stribos, Signe Holm Nielsen, Susanne Brix, Morten Asser Karsdal, Marc A Seelen, Harry van Goor, Stephan J L Bakker, Peter Olinga, Henricus A M Mutsaers, Federica Genovese
Kidney allograft failure due to chronic injury/rejection remains the main cause of graft loss in renal transplant recipients (RTR). Here, we investigated whether specific biomarkers of extracellular matrix (ECM) turnover are associated with allograft function and chronic kidney disease (CKD) stage in RTR. Seventy-eight patients who attended the University Medical Center Groningen for a routine check-up after kidney transplantation were enrolled in the study. Plasma and/or 24h-urine samples were collected and specific matrix-metalloproteinase-generated neo-epitope fragments of collagens were measured by enzyme-linked immunosorbent assay...
2017: PloS One
https://www.readbyqxmd.com/read/28424212/pdgf-receptor-%C3%AE-uses-akt-mtorc1-signaling-node-to-promote-high-glucose-induced-renal-proximal-tubular-cell-collagen-i-%C3%AE-2-expression
#3
Falguni Das, Nandini Ghosh-Choudhury, Balachandar Venkatesan, Balakuntalam S Kasinath, Goutam Ghosh Choudhury
Increased expression of PDGF receptor-β (PDGFRβ) has been shown in the diabetic renal proximal tubules. The core molecular network used by high glucose to induce proximal tubular epithelial cell collagen I (α2) expression is poorly understood. We hypothesized that activation of PDGFRβ by high glucose increases collagen I (α2) production via Akt/mTORC1 signaling pathway in proximal tubular epithelial cells. Using biochemical and molecular biological techniques, we investigated this hypothesis. We show that high glucose increases activating phosphorylation of the PDGFRβ, resulting in the phosphorylation of the phosphatidylinositol 3 kinase...
April 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28424210/ucp2-attenuates-apoptosis-of-tubular-epithelial-cells-in-renal-ischemia-reperfusion-injury
#4
Yang Zhou, Ting Cai, Jing Xu, Lei Jiang, Jining Wu, Qi Sun, Ke Zen, Junwei Yang
Uncoupling protein 2 (UCP2) plays critical roles in energy metabolism and cell survival. Previous investigations showed that UCP2 regulated the production of extracellular matrix and renal fibrosis. However, little is known about UCP2 in acute kidney injury. Here, we used UCP2 knockout mice to investigate the role of UCP2 in AKI model generated by renal ischemia/reperfusion (I/R) injury. The UCP2 global knockout mice were born and growth normal without kidney histological abnormality or renal dysfunctions. As compared with littermates, deletion of UCP2 exacerbated I/R-induced AKI while increase of UCP2 by conjugated linoleic acid (CLA) attenuated I/R injury...
April 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28421124/dahuang-fuzi-decoction-attenuates-renal-fibrosis-and-ameliorates-mitochondrial-dysfunction-in-chronic-aristolochic-acid-nephropathy
#5
Guang-Xing Shui, Dong Sang, Xun Yin, Yun Cai, Wei Sun
Objectives. The effects of the traditional formula Dahuang Fuzi Decoction (DFD) on chronic aristolochic acid nephropathy (AAN) in mice and its underlying mechanisms were studied. Methods. Mice were randomly divided into the following six groups: the control group, the model group (AAN), the saline-treated group (AAN + vehicle), the normal dose DFD-treated group (AAN + NDFD), the high dose DFD-treated group (AAN + HDFD), and the rosiglitazone treated group (AAN + Rosi). After treating for 8 weeks, 24 h urine and blood samples were collected and the mice sacrificed to study the biochemical parameters associated with renal function...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28416741/relaxin-abrogates-renal-interstitial-fibrosis-by-regulating-macrophage-polarization-via-inhibition-of-toll-like-receptor-4-signaling
#6
Lei Chen, Ming-Lei Sha, Deng Li, Yi-Ping Zhu, Xing-Jie Wang, Chen-Yi Jiang, Shu-Jie Xia, Yi Shao
Renal fibrosis is a common feature of chronic kidney disease (CKD). To inhibit the CKD process, it is important to prevent renal fibrosis, though CKD remains incurable. Renal fibrosis can be inhibited by relaxin in several experimental models, but the mechanism of relaxin for antifibrotic potential is still not clear. And here we have studied the role of relaxin in macrophage polarization and renal inflammation after unilateral ureteral obstruction (UUO). Our results show that relaxin can downregulate the Toll-like receptor (TLR) 4 signaling, shift macrophage polarization toward the M2 phenotype and ameliorat renal fibrosis in the early stages of UUO...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28416225/b-type-natriuretic-peptide-overexpression-ameliorates-hepatorenal-fibrocystic-disease-in%C3%A2-a%C3%A2-rat%C3%A2-model-of-polycystic-kidney-disease
#7
Sara J Holditch, Claire A Schreiber, Peter C Harris, Nicholas F LaRusso, Marina Ramirez-Alvarado, Alessandro Cataliotti, Vicente E Torres, Yasuhiro Ikeda
Polycystic kidney disease (PKD) involves progressive hepatorenal cyst expansion and fibrosis, frequently leading to end-stage renal disease. Increased vasopressin and cAMP signaling, dysregulated calcium homeostasis, and hypertension play major roles in PKD progression. The guanylyl cyclase A agonist, B-type natriuretic peptide (BNP), stimulates cGMP and shows anti-fibrotic, anti-hypertensive, and vasopressin-suppressive effects, potentially counteracting PKD pathogenesis. Here, we assessed the impacts of guanylyl cyclase A activation on PKD progression in a rat model of PKD...
April 14, 2017: Kidney International
https://www.readbyqxmd.com/read/28415704/maternal-exposure-to-di-n-butyl-phthalate-dbp-induces-renal-fibrosis-in-adult-rat-offspring
#8
Yi-Ping Zhu, Lei Chen, Xing-Jie Wang, Qi-Heng Jiang, Xiao-Yu Bei, Wen-Lan Sun, Shu-Jie Xia, Jun-Tao Jiang
This study was to determine the impact of maternal exposure to di-n-butyl phthalate (DBP) on renal development and fibrosis in adult offspring. Pregnant rats received DBP at a dose of 850 mg/kg BW/day by oral perfusion during gestational days 14-18. In DBP exposed newborn offspring, gross observation and histopathological examination revealed the dysplasia of kidney. The expression of genes related to renal development was also changed. In DBP exposed adult offspring, histopathological examination and Masson's trichrome staining revealed the pathological changes of renal fibrosis...
March 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414804/cyclosporine-a-alters-expression-of-renal-micrornas-new-insights-into-calcineurin-inhibitor-nephrotoxicity
#9
Jennifer L Gooch, Clayton King, Cynthia E Francis, Paul S Garcia, Yun Bai
Calcineurin inhibitors are powerful immunosuppressants that revolutionized organ transplantation. However, non-immune effects of the calcineurin inhibitor, such as cyclosporine A (CsA), have significantly hindered their use. Specifically, nephrotoxicity, which is associated with tubulointerstitial fibrosis, inflammation, and podocyte damage, affects up to half of all transplant patients. Calcineurin is involved in many aspects of kidney development and function; therefore, mechanisms of CsA-induced nephrotoxicity are complex and not yet fully understood...
2017: PloS One
https://www.readbyqxmd.com/read/28413861/preconditioning-with-melatonin-improves-therapeutic-outcomes-of-bone-marrow-derived-mesenchymal-stem-cells-in-targeting-liver-fibrosis-induced-by-ccl4
#10
Keywan Mortezaee, Neda Khanlarkhani, Fatemeh Sabbaghziarani, Saeid Nekoonam, Jamal Majidpoor, Amir Hosseini, Parichehr Pasbakhsh, Iraj Ragerdi Kashani, Adib Zendedel
Preconditioning of mesenchymal stem cells (MSCs) with melatonin (MT) has shown promising results in animal models of myocardial infarction, renal ischemia and cerebral ischemia. Here, we use this strategy in the liver fibrosis induced by CCl4. There were five groups: normal, CCl4, CCl4 + vehicle, CCl4 + BMMSCs and CCl4 + MT-bone marrow (BM)-derived MSCs (MT-BMMSCs). CCl4 was injected twice weekly for 8 weeks and treatment either with cells or vehicle was performed at the beginning of week 5 with a single dose...
April 17, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28413644/reduction-in-mirna-125b-5p-levels-is-associated-with-obstructive-renal-injury
#11
Silu Wang, Lianfeng Wu, Linyong Du, Hong Lu, Bicheng Chen, Yongheng Bai
Obstructive renal injury is a common disease that leads to progressive glomerulosclerosis, tubulointerstitial fibrosis and loss of renal function. MicroRNAs (miRNAs/miRs) are small non-coding molecules that may be involved in the progression of many renal diseases. The aim of the present study was to investigate the roles of miRNAs, including miR-125b, miR-326 and miR-324p, in obstructive renal injury. Blood samples were collected from 91 patients with ureteral obstruction and 76 controls to examine renal function...
April 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28413064/systemic-sclerosis
#12
REVIEW
Christopher P Denton, Dinesh Khanna
Systemic sclerosis, also called scleroderma, is an immune-mediated rheumatic disease that is characterised by fibrosis of the skin and internal organs and vasculopathy. Although systemic sclerosis is uncommon, it has a high morbidity and mortality. Improved understanding of systemic sclerosis has allowed better management of the disease, including improved classification and more systematic assessment and follow-up. Additionally, treatments for specific complications have emerged and a growing evidence base supports the use of immune suppression for the treatment of skin and lung fibrosis...
April 13, 2017: Lancet
https://www.readbyqxmd.com/read/28411025/klotho-down-regulates-egr-1-by-inhibiting-tgf-%C3%AE-1-smad3-signaling-in-high-glucose-treated-human-mesangial-cells
#13
Yang Li, Fang Hu, Meng Xue, Yi-Jie Jia, Zong-Ji Zheng, Ling Wang, Mei-Ping Guan, Yao-Ming Xue
Diabetic kidney disease (DKD) has become the leading cause of end-stage renal disease worldwide and is associated with glomerular mesangial cell (MC) proliferation and excessive extracellular matrix (ECM) production. Klotho can attenuate renal fibrosis in part by inhibiting TGF-β1/Smad3 signaling in DKD. Early growth response factor 1 (Egr-1) has been shown to play a key role in renal fibrosis in part by facilitating the formation of a positive feedback loop involving TGF-β1. However, whether Klotho down-regulates Egr-1 by inhibiting TGF-β1/Smad3 signaling in DKD is unclear...
April 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28409352/epithelial-to-mesenchymal-transition-emt-and-endothelial-to-mesenchymal-transition-endmt-role-and-implications-in-kidney-fibrosis
#14
Ana S Cruz-Solbes, Keith Youker
Tubulointerstitial injury is one of the hallmarks of renal disease. In particular, interstitial fibrosis has a prominent role in the development and progression of kidney injury. Collagen-producing fibroblasts are responsible for the ECM deposition. However, the origin of those activated fibroblasts is not clear. This chapter will discuss in detail the concept of epithelial to mesenchymal transition (EMT) and endothelial to mesenchymal transition (EndMT) in the context of fibrosis and kidney disease. In short, EMT and EndMT involve a change in cell shape, loss of polarity and increased motility associated with increased collagen production...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/28409351/inflammation-and-fibrosis-in-polycystic-kidney-disease
#15
Cheng Jack Song, Kurt A Zimmerman, Scott J Henke, Bradley K Yoder
Polycystic kidney disease (PKD) is a commonly inherited disorder characterized by cyst formation and fibrosis (Wilson, N Engl J Med 350:151-164, 2004) and is caused by mutations in cilia or cilia-related proteins, such as polycystin 1 or 2 (Oh and Katsanis, Development 139:443-448, 2012; Kotsis et al., Nephrol Dial Transplant 28:518-526, 2013). A major pathological feature of PKD is the development of interstitial inflammation and fibrosis with an associated accumulation of inflammatory cells (Grantham, N Engl J Med 359:1477-1485, 2008; Zeier et al...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/28409347/origin-and-function-of-the-renal-stroma-in-health-and-disease
#16
Christopher J Rowan, Sepideh Sheybani-Deloui, Norman D Rosenblum
The renal stroma is defined as a heterogeneous population of cells that serve both as a supportive framework and as a source of specialized cells in the renal capsule, glomerulus, vasculature, and interstitium. In this chapter, we review published evidence defining what, where, and why stromal cells are important. We describe the functions of the renal stroma andhow stromal derivatives are crucial for normal kidney function. Next, we review the specification of stromal cells from the Osr1+ intermediate mesoderm and T+ presomitic mesoderm during embryogenesis and stromal cell differentiation...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/28408805/effect-of-berberine-on-the-renal-tubular-epithelial-to-mesenchymal-transition-by-inhibition-of-the-notch-snail-pathway-in-diabetic-nephropathy-model-kkay-mice
#17
Guannan Yang, Zongjiang Zhao, Xinxue Zhang, Amin Wu, Yawei Huang, Yonghui Miao, Meijuan Yang
Renal tubular epithelial-to-mesenchymal transition (EMT) and renal tubular interstitial fibrosis are the main pathological changes of diabetic nephropathy (DN), which is a common cause of end-stage renal disease. Previous studies have suggested that berberine (BBR) has antifibrotic effects in the kidney and can reduce apoptosis and inhibit the EMT of podocytes in DN. However, the effect of BBR on the renal tubular EMT in DN and its mechanisms of action are unknown. This study was performed to explore the effects of BBR on the renal tubular EMT and the molecular mechanisms of BBR in DN model KKAy mice and on the high glucose (HG)-induced EMT in mouse renal tubular epithelial cells...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28408734/mycophenolate-mofetil-and-pulmonary-fibrosis-after-kidney-transplantation-a-case-report
#18
Kazuhiro Takahashi, Pauline Go, Chad H Stone, Mohamed Safwan, Krishna G Putchakayala, William J Kane, Lauren E Malinzak, Dean Y Kim, Jason E Denny
BACKGROUND Mycophenolate mofetil (MMF) induced lung disease has been described in only a few isolated reports. We report a case of fatal respiratory failure associated with MMF after kidney transplantation. CASE REPORT A 50-year-old Hispanic male with a history of end-stage renal disease secondary to hypertension underwent deceased donor kidney transplantation. His preoperative evaluations were normal except for a chest x-ray which showed bilateral interstitial opacities. Tacrolimus and MMF were started on the day of surgery...
April 14, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28408246/renal-protective-effect-and-action-mechanism-of-huangkui-capsule-and-its-main-five-flavonoids
#19
Hong-Die Cai, Shu-Lan Su, Da-Wei Qian, Sheng Guo, Wei-Wei Tao, Xu Dong Cong, Renmao Tang, Jin-Ao Duan
ETHNOPHARMACOLOGICAL RELEVANCE: The flower of Abelmoschus manihot (Linn.) Medicus (A. manihot), as a traditional Chinese Herbal medicine, was used widely in China with efficacy of inducing diuresis for treating strangurtia, and subdhing swelling and detoxicating. It has been reported that Huangkui capsule, prepared by the extract of the flower of A. manihot, can reduce the content of urinary protein, serum creatinine and serum urea nitrogen in nephropathy rats and processes renoprotective activity, while the action mechanism need to illuminate deeply...
April 10, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28403201/serum-endotrophin-a-type-vi-collagen-cleavage-product-is-associated-with-increased-mortality-in-chronic-kidney-disease
#20
Anthony Fenton, Mark D Jesky, Charles J Ferro, Jacob Sørensen, Morten A Karsdal, Paul Cockwell, Federica Genovese
BACKGROUND: Patients with chronic kidney disease (CKD) are at increased risk of end-stage renal disease (ESRD) and early mortality. The underlying pathophysiological processes are not entirely understood but may include dysregulation of extracellular matrix formation with accelerated systemic and renal fibrosis. We assessed the relationship between endotrophin (ETP), a marker of collagen type VI formation, and adverse outcomes in a cohort of patients with CKD. METHODS: We measured serum ETP levels in 500 patients from the Renal Impairment in Secondary Care (RIISC) study, a prospective observational study of patients with high-risk CKD...
2017: PloS One
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