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TUBULOINTERSTITIAL

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https://www.readbyqxmd.com/read/28725949/tubulointerstitial-nephritis-induced-hypophosphatemic-osteomalacia-in-sj%C3%A3-gren-s-syndrome-a-case-report-and-review-of-the-literature
#1
REVIEW
Yan Geng, Youlu Zhao, Zhuoli Zhang
Sjögren's syndrome (SS) is a chronic autoimmune inflammatory disease that typically affects the salivary and lacrimal glands. Renal involvement is relatively uncommon and may precede other complaints. Tubulointestitial nephritis (TIN) is the most common renal involvement in SS. Osteomalacia occurring as the first manifestation of renal tubular disorder due to SS is very rare. We report a 39-year-old male who presented with polydipsia, polyuria, and multiple bone pain. Bone density test showed severe osteoporosis, and laboratory findings suggested hypokalemia, hypophosphatemia, and vitamin D deficiency, which supported the diagnosis of hypophosphatemic osteomalacia...
July 20, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28724608/erbb4-deletion-accelerates-renal-fibrosis-following-renal-injury
#2
Fenghua Zeng, Tomoki Miyazawa, Lance A Kloepfer, Raymond C Harris
Tubulointerstitial fibrosis (TIF) is a prominent factor in the progression of chronic kidney disease (CKD) regardless of etiology. ErbB4 expression levels were inversely correlated to renal fibrosis in human fibrotic kidneys. In both unilateral ureteral obstruction (UUO) and ischemia reperfusion injury followed by uninephrectomy (IRI/UNx) mouse models, expression levels of ErbB4 were elevated in the early stage of renal injury. Using mice with global ErbB4 deletion except for transgenic rescue in cardiac tissue (ErbB4-/-ht+), we determined that UUO induced similar injury in proximal tubules compared to wild-type mice but more severe injury in distal nephrons...
July 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28723681/inhibition-of-necroptosis-attenuates-kidney-inflammation-and-interstitial-fibrosis-induced-by-unilateral-ureteral-obstruction
#3
Xia Xiao, Chunyang Du, Zhe Yan, Yonghong Shi, Huijun Duan, Yunzhuo Ren
BACKGROUND: Inflammation plays a crucial role in renal interstitial fibrosis, the pathway of chronic kidney diseases. Necroptosis is a novel form of regulated cell death, which plays a potential role in inflammation and renal diseases. The small molecule necrostatin-1 (Nec-1) is a specific inhibitor of necroptosis. This study was aimed at determining the role of necroptosis, RIP1/RIP3/mixed lineage kinase domain-like (MLKL) signaling pathway, in renal inflammation and interstitial fibrosis related to primitive tubulointerstitial injury...
July 20, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28715949/contrast-enhanced-ultrasound-for-assessing-renal-perfusion-impairment-and-predicting-acute-kidney-injury-to-chronic-kidney-disease-progression
#4
Wei Cao, Shuang Cui, Li Yang, Chunyi Wu, Jian Liu, Fang Yang, Youhua Liu, Jianping Bin, Fan Fan Hou
AIMS: Acute kidney injury (AKI) is increasingly recognized as a major risk factor leading to progression to chronic kidney disease (CKD). However, the diagnostic tools for predicting AKI to CKD progression are particularly lacking. Here, we tested the utility of contrast enhanced ultrasound (CEUS) for predicting progression to CKD after AKI by using both mild (20-minute) and severe (45-minute) bilateral renal ischemia/reperfusion injury (IRI) mice. RESULTS: Renal perfusion measured by CEUS reduced to 25%±7% and 14%±6% of the pre-ischemic levels in mild and severe AKI 1 hour after ischemia (P<0...
July 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28710113/trap1-ameliorates-renal-tubulointerstitial-fibrosis-in-mice-with-unilateral-ureteral-obstruction-by-protecting-renal-tubular-epithelial-cell-mitochondria
#5
Jun-Feng Chen, Qi-Shun Wu, Yu-Xian Xie, Bo-Lin Si, Ping-Ping Yang, Wen-Yan Wang, Qin Hua, Qing He
Mitochondrial dysfunction causes renal tubular epithelial cell injury and promotes cell apoptosis and renal tubulointerstitial fibrosis (TIF) progression. TNF receptor-associated protein 1 (TRAP1) is a molecular chaperone protein that is localized in mitochondria. It plays an important role in cell apoptosis; however, its functional mechanism in TIF remains unclear. In this study, we observed the effects of TRAP1 in renal tubular epithelial cell mitochondria in mice with unilateral ureteral obstruction and its function in cell apoptosis and TIF...
July 14, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28709637/tubulointerstitial-fibrosis-can-sensitize-the-kidney-to-subsequent-glomerular-injury
#6
Beom Jin Lim, Jae Won Yang, Jun Zou, Jianyong Zhong, Taiji Matsusaka, Ira Pastan, Ming-Zhi Zhang, Raymond C Harris, Hai-Chun Yang, Agnes B Fogo
Chronic glomerular injury is associated with eventual development of tubulointerstitial fibrosis. Here we aimed to assess whether, and how, mild chronic tubulointerstitial injury affects glomeruli. For this, we generated mice expressing different toxin receptors, one on their proximal tubular epithelial cells (diphtheria toxin receptor [DTR]) and the other only on podocytes (human CD25 [IL-2R] driven by the nephrin promoter [Nep25]), allowing serial induction of tubule-specific and glomerular (podocyte)-specific injury, respectively...
July 12, 2017: Kidney International
https://www.readbyqxmd.com/read/28709457/tubulointerstitial-nephritis-and-uveitis-tinu-syndrome-a-systematic-review-of-its-epidemiology-demographics-and-risk-factors
#7
REVIEW
Linda O Okafor, Peter Hewins, Philip I Murray, Alastair K Denniston
Tubulointerstitial nephritis and uveitis (TINU) syndrome is a rare oculorenal inflammatory condition that was first described in 1975. In 2001 a major review identified 133 cases in the world literature and proposed key diagnostic criteria for the condition. Although acknowledged as rare, the limited data available prevented reliable estimates of the prevalence of the condition, and hampered elucidation of the relationship between genetic and environmental factors that contribute to its pathogenesis.In this review we have performed a systematic search on the epidemiology, demographics and proposed risk factors for TINU...
July 14, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28707726/ivig-triggered-tubulointerstitial-nephritis-in-x-linked-agammaglobulinemia
#8
Masahiro Takeguchi, Seigo Korematsu, Hiroaki Miyahara, Shuji Kuga, Tatsuro Izumi
No abstract text is available yet for this article.
July 14, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28707079/down-regulation-of-mir-23a-inhibits-high-glucose-induced-emt-and-renal-fibrogenesis-by-up-regulation-of-snon
#9
Haiping Xu, Fuyun Sun, Xiuli Li, Lina Sun
It has been reported that transforming growth factor-β1 (TGF-β1) signaling plays an important role in the development of diabetic nephropathy (DN). The nuclear transcription co-repressor Ski-related novel protein N (SnoN) is a critical negative regulator of TGF-β1/Smad signal pathway, involving in tubule epithelial-mesenchymal transition (EMT), extracellular matrix (ECM) accumulation, and tubulointerstitial fibrosis. In this study, we focused on miR-23a as a regulator of SnoN. Our purpose is to study the effects of miR-23a on high glucose (HG)-induced EMT process and ECM deposition in HK2 cells...
July 13, 2017: Human Cell
https://www.readbyqxmd.com/read/28704264/extravascular-renal-denervation-ameliorates-juvenile-hypertension-and-renal-damage-resulting-from-experimental-hyperleptinemia-in-rats
#10
Nynke R Oosterhuis, Ramon Fernandes, Nuria Maicas, Sung Eun Bae, Joaquim Pombo, Hendrik Gremmels, Lucilla Poston, Jaap A Joles, Anne-Maj Samuelsson
BACKGROUND: Material obesity in rodents is associated with neonatal hyperleptinemia and hypertension of sympathetic origin in adult offspring. Previously, we reported that experimentally induced hyperleptinemia in rat pups results in adulthood hypertension. Here, we addressed the hypothesis that experimental neonatal hyperleptinemia, through renal nerve activation, adversely affects adult renal function. METHOD: Sprague-Dawley male and female pups were treated with neonatal leptin (3 mg/kg, intraperitoneal) or neonatal saline, twice daily from postnatal day 9-14...
July 12, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28701516/blocking-tgf-%C3%AE-and-%C3%AE-catenin-epithelial-crosstalk-exacerbates-ckd
#11
Stellor Nlandu-Khodo, Surekha Neelisetty, Melanie Phillips, Marika Manolopoulou, Gautam Bhave, Lauren May, Peter E Clark, Haichun Yang, Agnes B Fogo, Raymond C Harris, M Mark Taketo, Ethan Lee, Leslie S Gewin
The TGF-β and Wnt/β-catenin pathways have important roles in modulating CKD, but how these growth factors affect the epithelial response to CKD is not well studied. TGF-β has strong profibrotic effects, but this pleiotropic factor has many different cellular effects depending on the target cell type. To investigate how TGF-β signaling in the proximal tubule, a key target and mediator of CKD, alters the response to CKD, we injured mice lacking the TGF-β type 2 receptor specifically in this epithelial segment...
July 12, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28701203/discovery-of-a-novel-dominant-mutation-in-the-ren-gene-after-forty-years-of-renal-disease-a-case-report
#12
Rhian L Clissold, Helen C Clarke, Olivera Spasic-Boskovic, Kim Brugger, Stephen Abbs, Coralie Bingham, Charles Shaw-Smith
BACKGROUND: Heterozygous mutations in the gene encoding renin (REN) cause autosomal dominant tubulointerstitial kidney disease (ADTKD), early-onset anaemia and hyperuricaemia; only four different mutations have been described in the published literature to date. We report a novel dominant REN mutation discovered in an individual after forty years of renal disease. CASE PRESENTATION: A 57 year old Caucasian woman with chronic kidney disease stage five was reviewed in a regional joint renal genetics clinic...
July 12, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28685938/acquired-gitelman-syndrome-in-a-primary-sj%C3%A3-gren-syndrome-patient-with-a-slc12a3-heterozygous-mutation-a-case-report-and-literature-review
#13
Xiangchen Gu, Zheling Su, Min Chen, Yanqiu Xu, Yi Wang
Acquired Gitelman's syndrome (GS) associated with Sjögren syndrome (SS) is rare. A 50-year-old woman was admitted to our department because of nausea, acratia and sicca complex. Laboratory tests after admission showed renal failure, hypokalaemia, metabolic alkalosis, hypomagnesaemia and hypocalciuria, all of which met the diagnostic criteria for GS. Diagnostic evaluation identified primary SS as the cause of the acquired GS. Light microscopy of the renal tissue from the patient showed severe membranoproliferative glomerunephritis and tubulointerstitial nephritis...
August 2017: Nephrology
https://www.readbyqxmd.com/read/28685176/the-hormetic-functions-of-wnt-pathways-in-tubular-injury
#14
REVIEW
Elisabeth F Gröne, Giuseppina Federico, Peter J Nelson, Bernd Arnold, Hermann-Josef Gröne
Chronic tubulointerstitial damage with tubular epithelial atrophy and interstitial fibrosis is the hallmark of chronic kidney disease (CKD) and a predictor for progression of CKD.Several experiments have now provided evidence that the Wnt signaling pathways are significantly contributing to atrophy and fibrosis; in contrast, it also has been shown that the Wnt system fosters regenerative processes in acute tubular injury.We now have demonstrated that Dickkopf 3 (DKK3) is an agonist for canonical Wnt signaling in CKD and fosters chronic fibrosing inflammation of the tubulointerstitial compartment...
July 6, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28680529/mir-382-contributes-to-renal-tubulointerstitial-fibrosis-by-downregulating-hspd1
#15
Yi Fang, Ting Xie, Ning Xue, Qing Kuang, Zheng Wei, Mingyu Liang, Xiaoqiang Ding
Redox imbalance plays an important role in the pathogenesis of CKD progression. Previously, we demonstrated that microRNA-382 (miR-382) contributed to TGF-β1-induced loss of epithelial polarity in human kidney epithelial cells, but its role in the development of renal tubulointerstitial fibrosis remains unknown. In this study, we found that with 7 days of unilateral ureteral obstruction (UUO) in mice, the abundance of miR-382 in the obstructed kidney was significantly increased. Meanwhile, the protein expression of heat shock protein 60 (HSPD1), a predicted target of miR-382, was reduced after 7 days of UUO...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28677767/lysyl-oxidase%C3%A2-like-2-is-expressed-in-kidney-tissue-and-is-associated-with-the-progression-of-tubulointerstitial-fibrosis
#16
Sung-Eun Choi, Nara Jeon, Hoon Young Choi, Jae Il Shin, Hyeon Joo Jeong, Beom Jin Lim
Tubulointerstitial fibrosis is a common end point of chronic kidney diseases, and preventing its progression is key to avoiding renal failure. Transforming growth factor‑β (TGF‑β) and associated molecules promote tubulointerstitial fibrosis; however, effective therapies targeting these molecules have yet to be developed. Lysyl oxidase‑like 2 (LOXL2), which is involved in invasive growth and metastasis of malignant neoplasms, has recently been reported to serve a key role in hepatic and pulmonary fibrosis...
July 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28673900/inhibition-of-i%C3%AE%C2%BAb-kinase-at-24%C3%A2-hours-after-acute-kidney-injury-improves-recovery-of-renal-function-and-attenuates-fibrosis
#17
Florence L Johnson, Nimesh S A Patel, Gareth S D Purvis, Fausto Chiazza, Jianmin Chen, Regina Sordi, Guillaume Hache, Viktoria V Merezhko, Massimo Collino, Muhammed M Yaqoob, Christoph Thiemermann
BACKGROUND: Acute kidney injury (AKI) is a major risk factor for the development of chronic kidney disease. Nuclear factor-κB is a nuclear transcription factor activated post-ischemia, responsible for the transcription of proinflammatory proteins. The role of nuclear factor-κB in the renal fibrosis post-AKI is unknown. METHODS AND RESULTS: We used a rat model of AKI caused by unilateral nephrectomy plus contralateral ischemia (30 minutes) and reperfusion injury (up to 28 days) to show impairment of renal function (peak: 24 hours), activation of nuclear factor-κB (peak: 48 hours), and fibrosis (28 days)...
July 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28670253/renal-involvement-in-leprosy-evaluation-of-patients-in-turkey
#18
Savas Ozturk, Tulin Ozturk, Ilkay Can
INTRODUCTION: Renal involvement in leprosy has previously been described in the literature and can include amyloidosis, glomerulonephritis, nephrosclerosis, tubulointerstitial nephritis, and granulomas. AIM: To evaluate renal involvement in Turkish patients with leprosy. MATERIAL AND METHODS: In total, 32 patients with lepromatous leprosy but without any co-morbidities and 35 healthy control subjects were evaluated for renal involvement at the Elazig Training and Research Hospital in Turkey...
June 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28669995/redefining-lupus-nephritis-clinical-implications-of-pathophysiologic-subtypes
#19
REVIEW
Feng Yu, Mark Haas, Richard Glassock, Ming-Hui Zhao
Systemic lupus erythematosus (SLE) is associated with a broad spectrum of clinical and immunologic manifestations, of which lupus nephritis is the most common cause of morbidity and mortality. The development of nephritis in patients with SLE involves multiple pathogenic pathways including aberrant apoptosis, autoantibody production, immune complex deposition and complement activation. The 2003 International Society of Nephrology/Renal Pathology Society (ISN/RPS) classification system for lupus nephritis was widely accepted with high intraobserver and interobserver concordance to guide therapeutic strategy and provide prognostic information...
August 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/28655392/outcome-of-polyomavirus-nephropathy-in-renal-transplant-patients-a-single-center-experience
#20
Nika Kojc, Andreja Aleš Rigler, Gregor Mlinšek, Damjan Kovač, Dušan Ferluga, Miha Arnol
BACKGROUND: Reduction of immunosuppression is a common therapeutic strategy in patients with polyomavirus nephropathy (PVN) but may be associated with acute rejection. This study aimed to evaluate the morphology of PVN in renal biopsies after reduction of immunosuppression. METHODS: Eight of 241 patients who received a kidney transplant between January 2012 and December 2015 presented with BK viremia and biopsy-proven PVN. Morphological evaluation according to Banff criteria and correlation with viremia and kidney function after immunosuppression reduction was performed...
June 28, 2017: Clinical Nephrology
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