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Renal fibrosis

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https://www.readbyqxmd.com/read/28319118/functional-mri-for-characterization-of-renal-perfusion-impairment-and-edema-formation-due-to-acute-kidney-injury-in-different-mouse-strains
#1
Susanne Tewes, Faikah Gueler, Rongjun Chen, Marcel Gutberlet, Mi-Sun Jang, Martin Meier, Michael Mengel, Dagmar Hartung, Frank Wacker, Song Rong, Katja Hueper
PURPOSE: The purpose was to characterize acute kidney injury (AKI) in C57BL/6 (B6)- and 129/Sv (Sv)-mice by noninvasive measurement of renal perfusion and tissue edema using functional MRI. METHODS: Different severities of AKI were induced in B6- and Sv-mice by renal ischemia reperfusion injury (IRI). Unilateral clamping of the renal pedicle for 35 min (moderate AKI) or 45 min (severe AKI) was done. MRI (7-Tesla) was performed 1, 7 and 28 days after surgery using a flow alternating inversion recovery (FAIR) arterial spin labeling (ASL) sequence...
2017: PloS One
https://www.readbyqxmd.com/read/28318680/nephrogenic-systemic-fibrosis-a-15-year-retrospective-study-at-a-single-tertiary-care-center
#2
Janice Wilson, Kristyna Gleghorn, Quincy Seigel, Brent Kelly
BACKGROUND: Despite multiple therapeutic approaches for nephrogenic systemic fibrosis (NSF), no single treatment has convincingly shown consistent benefit. The most successful outcomes have been associated with recovery of renal function, although evidence remains limited and past studies have been inconclusive. OBJECTIVE: We sought to investigate whether improvement of renal function via successful transplantation or via return of renal function after acute kidney injury correlates with improvement of NSF, and to further characterize the clinical features and progression of NSF...
March 15, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28318631/the-antihelmenthic-phosphate-niclosamide-impedes-renal-fibrosis-by-inhibiting-homeodomain-interacting-protein-kinase-2-expression
#3
Xiaoyan Chang, Xin Zhen, Jixing Liu, Xiaomei Ren, Zheng Hu, Zhanmei Zhou, Fengxin Zhu, Ke Ding, Jing Nie
Renal fibrosis is the final common pathway of all varieties of progressive chronic kidney disease. However, there are no effective therapies to prevent or slow the progression of renal fibrosis. Niclosamide is a US Food and Drug Administration-approved oral antihelminthic drug used for treating most tapeworm infections. Here, we demonstrated that phosphate niclosamide, the water-soluble form of niclosamide, significantly reduced proteinuria, glomerulosclrotic lesions, and interstitial fibrosis in a murine model of adriamycin nephropathy...
March 16, 2017: Kidney International
https://www.readbyqxmd.com/read/28317867/double-knockout-of-bax-and-bak-from-kidney-proximal-tubules-reduces-unilateral-urethral-obstruction-associated-apoptosis-and-renal-interstitial-fibrosis
#4
Shuqin Mei, Lin Li, Qingqing Wei, Jielu Hao, Yunchao Su, Changlin Mei, Zheng Dong
Interstitial fibrosis, a common pathological feature of chronic kidney diseases, is often associated with apoptosis in renal tissues. To determine the associated apoptotic pathway and its role in renal interstitial fibrosis, we established a mouse model in which Bax and Bak, two critical genes in the intrinsic pathway of apoptosis, were deleted specifically from kidney proximal tubules and used this model to examine renal apoptosis and interstitial fibrosis following unilateral urethral obstruction (UUO). It was shown that double knockout of Bax and Bak from proximal tubules attenuated renal tubular cell apoptosis and suppressed renal interstitial fibrosis in UUO...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315683/klotho-ameliorates-cyclosporine-a-induced-nephropathy-via-pdlim2-nf-kb-p65-signaling-pathway
#5
Meihua Jin, Pengfei Lv, Guanyu Chen, Peng Wang, Zhongfu Zuo, Lili Ren, Jing Bi, Chul-Woo Yang, Xifan Mei, Donghe Han
Klotho, an antiaging protein, can extend the lifespan and modulate cellular responses to inflammation and oxidative stress which can ameliorate chronic kidney diseases (CKD). To investigate the molecular mechanism of Klotho on inflammation in cyclosporine A (CsA) induced nephropathy, the mice were transfected with adenovirus mediated Klotho gene and treated with cyclosporine A (CsA; 30 mg/kg/day) for 4 weeks. Also, primary human renal proximal tubule epithelial cells (RPTECs) were treated with soluble Klotho protein and LPS...
March 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28314576/trpc6-and-kidney-disease-sclerosing-more-than-just-glomeruli
#6
Johannes Schlondorff
Fibrosis is a common response to injury but can also perpetuate tissue dysfunction. Transient receptor potential C6 (TRPC6) is implicated in cardiac and skin healing via regulation of myofibroblast differentiation. Wu et al. now demonstrate a role for TRPC6 in renal fibrosis, via a mechanism that also relies on TRPC3 and is antagonized by soluble klotho. Modulation of TRPC3/6 activity may provide a means of dampening the fibrotic response involved in chronic kidney disease progression.
April 2017: Kidney International
https://www.readbyqxmd.com/read/28303659/invasive-characterization-of-atherosclerotic-plaque-in-patients-with-peripheral-arterial-disease-using-near-infrared-spectroscopy-intravascular-ultrasound
#7
Amr E Abbas, Sibin K Zacharias, James A Goldstein, Ivan D Hanson, Robert D Safian
OBJECTIVES: We describe the characteristics of atherosclerotic plaque in patients with peripheral arterial disease (PAD) using near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS) BACKGROUND: Imaging and autopsy studies have described atherosclerotic plaque in different vascular beds, including varying degrees of lipid, fibrosis, and calcification. Recently, NIRS has been validated as an accurate method for detecting lipid-core plaque (LCP) in the coronary circulation. Invasive evaluation of plaque composition using NIRS-IVUS has not been reported in different peripheral arterial circulations...
March 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28298633/specific-expression-of-heme-oxygenase-1-by-myeloid-cells-modulates-renal-ischemia-reperfusion-injury
#8
Maxime Rossi, Antoine Thierry, Sandrine Delbauve, Nicolas Preyat, Miguel P Soares, Thierry Roumeguère, Oberdan Leo, Véronique Flamand, Alain Le Moine, Jean-Michel Hougardy
Renal ischemia-reperfusion injury (IRI) is a major risk factor for delayed graft function in renal transplantation. Compelling evidence exists that the stress-responsive enzyme, heme oxygenase-1 (HO-1) mediates protection against IRI. However, the role of myeloid HO-1 during IRI remains poorly characterized. Mice with myeloid-restricted deletion of HO-1 (HO-1(M-KO)), littermate (LT), and wild-type (WT) mice were subjected to renal IRI or sham procedures and sacrificed after 24 hours or 7 days. In comparison to LT, HO-1(M-KO) exhibited significant renal histological damage, pro-inflammatory responses and oxidative stress 24 hours after reperfusion...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28298435/could-mri-be-used-to-image-kidney-fibrosis-a-review-of-recent-advances-and-remaining-barriers
#9
REVIEW
General Leung, Anish Kirpalani, Stephen G Szeto, Maya Deeb, Warren Foltz, Craig A Simmons, Darren A Yuen
A key contributor to the progression of nearly all forms of CKD is fibrosis, a largely irreversible process that drives further kidney injury. Despite its importance, clinicians currently have no means of noninvasively assessing renal scar, and thus have historically relied on percutaneous renal biopsy to assess fibrotic burden. Although helpful in the initial diagnostic assessment, renal biopsy remains an imperfect test for fibrosis measurement, limited not only by its invasiveness, but also, because of the small amounts of tissue analyzed, its susceptibility to sampling bias...
March 15, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28298077/effects-of-colchicine-on-renal-fibrosis-and-apoptosis-in-obstructed-kidneys
#10
Sejoong Kim, Eun Sook Jung, Jeonghwan Lee, Nam Ju Heo, Ki Young Na, Jin Suk Han
Background/Aims: Colchicine is an established drug for microtubule stabilization that may reduce tissue injury. No data were available that its effects may depend on the dosage of colchicine. We investigated the anti-fibrotic and apoptotic effects of various dose of colchicine in a unilateral ureteral obstruction (UUO) model. Methods: Thirty-six Sprague-Dawley rats were randomly assigned into six groups. Two sham groups were divided into a vehicle-treated or colchicine-treated group (100 μg/kg/day)...
March 18, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28297566/instructive-role-of-the-microenvironment-in-preventing-renal-fibrosis
#11
Kei Matsumoto, Sandhya Xavier, Jun Chen, Yujiro Kida, Mark Lipphardt, Reina Ikeda, Annie Gevertz, Mario Caviris, Antonis K Hatzopoulos, Ivo Kalajzic, James Dutton, Brian B Ratliff, Hong Zhao, Zbygniew Darzynkiewicz, Stefan Rose-John, Michael S Goligorsky
Accumulation of myofibroblasts is a hallmark of renal fibrosis. A significant proportion of myofibroblasts has been reported to originate via endothelial-mesenchymal transition. We initially hypothesized that exposing myofibroblasts to the extract of endothelial progenitor cells (EPCs) could reverse this transition. Indeed, in vitro treatment of transforming growth factor-β1 (TGF-β1)-activated fibroblasts with EPC extract prevented expression of α-smooth muscle actin (α-SMA); however, it did not enhance expression of endothelial markers...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28296375/-endomyocardial-fibrosis-associated-to-antiphospholipid-syndrome-case-report-and-review
#12
Carlos A Parquet, Jorge Curotto-Grasiosi, Rogelio A Machado, Bruno Peressotti, Matías B Padilla, Alberto L Bolaño
A 29-year-old man with a history of seizures, was admitted due to an episode of unconsciousness recovered and hypertension with renal disfunction. The electrocardiogram mimicked a hypertrophic cardiomyopathy, but, by Doppler echocardiography, this was discarded because it suggested endomyocardial fibrosis which was confirmed by cardiac magnetic resonance imaging with late enhancement. Since the episode of unconsciousness, brain imaging studies were performed showing vascular sequelae and microangiopathic lesions...
March 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28295820/comparison-of-readout-segmented-and-conventional-single-shot-for-echo-planar-diffusion-weighted-imaging-in-the-assessment-of-kidney-interstitial-fibrosis
#13
Iris Friedli, Lindsey Alexandra Crowe, Thomas de Perrot, Lena Berchtold, Pierre-Yves Martin, Sophie de Seigneux, Jean-Paul Vallée
PURPOSE: To compare readout-segmented echo-planar imaging (EPI) (RESOLVE) to single-shot EPI (ss-EPI) diffusion-weighted imaging (DWI) for the assessment of renal interstitial fibrosis. MATERIALS AND METHODS: A phantom, eight healthy volunteers (under 30 years to avoid age-fibrosis related) and 27 chronic kidney disease (CKD) patients (scheduled for kidney biopsy) were scanned (at 3T) with ss-EPI and 5-shot RESOLVE DWI (resolution: 2 × 2 × 5 mm(3) , 10 b-values)...
March 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28293259/influence-of-normo-and-hypogonadal-condition-hyperuricemia-and-high-fructose-diet-on-renal-changes-in-male-rats
#14
Jimena Soutelo, Yanina Alejandra Samaniego, Elsa Zotta, María Cecilia Fornari, Carlos Reyes Toso, Osvaldo Juan Ponzo
Background. There is a gender disparity in the incidence, prevalence, and progression of renal disease. The object of this paper is to evaluate the presence and type of renal lesion in normogonadic and hypogonadic male rats in a mild hyperuricemia induced condition and exposed to a high-fructose diet. Methods. 56 adult male Wistar rats were used. Animals were divided into two groups, one normogonadic (NGN) and one hypogonadic (HGN), and each group was divided into four subgroups in accordance with the treatment: control with only water (C), fructose (F), oxonic acid (OA), and fructose + oxonic acid (FOA)...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28292724/deleterious-role-of-trace-elements-silica-and-lead-in-the-development-of-chronic-kidney-disease
#15
Starlaine Mascarenhas, Srikanth Mutnuri, Anasuya Ganguly
Chronic-Kidney-Disease of Unknown-etiology (CKDu) has been reported in developing-countries like Sri-Lanka, India and Central-America without sparing the Indian sub-district (namely Canacona) located in south-Goa. The disease etiology is unlinked to common causes of diabetes and hypertension and assumed to be environmentally induced due to its asymptomatic-nature and occurrence in groundwater relying communities. This study aimed to understand environmental risk-factors underlying CKDu-etiology using Indian sub-district (Canacona) as case-study...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28291548/the-role-of-interleukin-17a-in-the-pathogenesis-of-kidney-diseases
#16
REVIEW
Charlotte Cortvrindt, Reinhart Speeckaert, Alena Moerman, Joris R Delanghe, Marijn M Speeckaert
Being a member of the IL-17 family, comprising six structurally related ligands, IL-17A is a cytokine, produced by multiple cell types, such as CD4(+)αβ T cells, γδ T cells, natural killer cells, neutrophils, macrophages, dendritic cells, lymphoid tissue inducer cells, mast cells and plasma cells. IL-17A participates in tissue inflammation by inducing the expression of chemokines, proinflammatory cytokines and matrix metalloproteases. Besides its role in host defence against infectious diseases, IL-17A is involved in different autoimmune and inflammatory diseases...
March 10, 2017: Pathology
https://www.readbyqxmd.com/read/28288193/nonalcoholic-fatty-liver-disease-and-increased-risk-of-1-year-all-cause-and-cardiac-hospital-readmissions-in-elderly-patients-admitted-for-acute-heart-failure
#17
Filippo Valbusa, Stefano Bonapace, Davide Agnoletti, Luca Scala, Cristina Grillo, Pietro Arduini, Emanuela Turcato, Alessandro Mantovani, Giacomo Zoppini, Guido Arcaro, Christopher Byrne, Giovanni Targher
Nonalcoholic fatty liver disease (NAFLD) is an emerging risk factor for heart failure (HF). Although some progress has been made in improving survival among patients admitted for HF, the rates of hospital readmissions and the related costs continue to rise dramatically. We sought to examine whether NAFLD and its severity (diagnosed at hospital admission) was independently associated with a higher risk of 1-year all-cause and cardiac re-hospitalization in patients admitted for acute HF. We studied 212 elderly patients who were consecutively admitted with acute HF to the Hospital of Negrar (Verona) over a 1-year period...
2017: PloS One
https://www.readbyqxmd.com/read/28286899/epigenetics-of-kidney-disease
#18
REVIEW
Nicola Wanner, Wibke Bechtel-Walz
DNA methylation and histone modifications determine renal programming and the development and progression of renal disease. The identification of the way in which the renal cell epigenome is altered by environmental modifiers driving the onset and progression of renal diseases has extended our understanding of the pathophysiology of kidney disease progression. In this review, we focus on current knowledge concerning the implications of epigenetic modifications during renal disease from early development to chronic kidney disease progression including renal fibrosis, diabetic nephropathy and the translational potential of identifying new biomarkers and treatments for the prevention and therapy of chronic kidney disease and end-stage kidney disease...
March 13, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28286065/polydatin-promotes-nrf2-are-anti-oxidative-pathway-through-activating-ckip-1-to-resist-hg-induced-up-regulation-of-fn-and-icam-1-in-gmcs-and-diabetic-mice-kidneys
#19
Wenyan Gong, Jie Li, Zhiquan Chen, Junying Huang, Qiuhong Chen, Weibin Cai, Peiqing Liu, Heqing Huang
Our previous study indicated that Casein kinase 2 interacting protein-1 (CKIP-1) could promote the activation of the nuclear factor E2-related factor 2 (Nrf2)/ antioxidant response element (ARE) pathway, playing a significant role in inhibiting the fibrosis of diabetic nephropathy (DN). Polydatin (PD) has been shown to possess strong resistance effects on renal fibrosis which is closely related to activating the Nrf2/ARE pathway, too. Whereas, whether PD could resist DN through regulating CKIP-1 and consequently promoting the activation of Nrf2-ARE pathway needs further investigation...
March 9, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28285987/tgf%C3%AE-incurred-epigenetic-aberrations-of-mirna-and-dna-methyltransferase-suppress-klotho-and-potentiate-renal-fibrosis
#20
Shasha Yin, Qin Zhang, Jun Yang, Wenjun Lin, Yanning Li, Fang Chen, Wangsen Cao
Renal fibrosis is a common pathological feature of chronic kidney diseases (CKD) and its development and progression are significantly affected by epigenetic modifications such as aberrant miRNA and DNA methylation. Klotho is an anti-aging and anti-fibrotic protein and its early decline after renal injury is reportedly associated with aberrant DNA methylation. However, the key upstream pathological mediators and the molecular cascade leading to epigenetic Klotho suppression are not appreciably established. Here we investigate the epigenetic mechanism of Klotho deficiency and its functional relevance in renal fibrogenesis...
March 7, 2017: Biochimica et Biophysica Acta
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