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epigenetics in CKD

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https://www.readbyqxmd.com/read/28777303/novel-biomarkers-in-the-diagnosis-of-chronic-kidney-disease-and-the-prediction-of-its-outcome
#1
REVIEW
Jacek Rysz, Anna Gluba-Brzózka, Beata Franczyk, Zbigniew Jabłonowski, Aleksandra Ciałkowska-Rysz
In its early stages, symptoms of chronic kidney disease (CKD) are usually not apparent. Significant reduction of the kidney function is the first obvious sign of disease. If diagnosed early (stages 1 to 3), the progression of CKD can be altered and complications reduced. In stages 4 and 5 extensive kidney damage is observed, which usually results in end-stage renal failure. Currently, the diagnosis of CKD is made usually on the levels of blood urea and serum creatinine (sCr), however, sCr has been shown to be lacking high predictive value...
August 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28667065/current-epigenetic-aspects-the-clinical-kidney-researcher-should-embrace
#2
REVIEW
Anna Witasp, Amaryllis H Van Craenenbroeck, Paul G Shiels, Tomas J Ekström, Peter Stenvinkel, Louise Nordfors
Chronic kidney disease (CKD), affecting 10-12% of the world's adult population, is associated with a considerably elevated risk of serious comorbidities, in particular, premature vascular disease and death. Although a wide spectrum of causative factors has been identified and/or suggested, there is still a large gap of knowledge regarding the underlying mechanisms and the complexity of the CKD phenotype. Epigenetic factors, which calibrate the genetic code, are emerging as important players in the CKD-associated pathophysiology...
July 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28652544/ghrelin-treatment-improves-physical-decline-in-sarcopenia-model-mice-through-muscular-enhancement-and-mitochondrial-activation
#3
Masanori Tamaki, Kazutoshi Miyashita, Aika Hagiwara, Shu Wakino, Hiroyuki Inoue, Kentaro Fujii, Chikako Fujii, Sho Endo, Asuka Uto, Masanori Mitsuishi, Masaaki Sato, Toshio Doi, Hiroshi Itoh
Chronic kidney disease (CKD) impairs physical performance in humans, which leads to a risk of all-cause mortality. In our previous study, we demonstrated that a reduction in muscle mitochondria rather than muscle mass was a major cause of physical decline in 5/6 nephrectomized CKD model mice. Because ghrelin administration has been reported to enhance oxygen utilization in skeletal muscle, we examined the usefulness of ghrelin for a recovery of physical decline in 5/6 nephrectomized C57Bl/6 mice, focusing on the epigenetic modification of peroxisome proliferator activated receptor gamma coactivator-1α (PGC-1α), a master regulator of mitochondrial biogenesis...
2017: Endocrine Journal
https://www.readbyqxmd.com/read/28595179/epigenetic-changes-in-the-acute-kidney-injury-to-chronic-kidney-disease-transition
#4
Masaomi Nangaku, Yosuke Hirakawa, Imari Mimura, Reiko Inagi, Tetsuhiro Tanaka
Previously acute kidney injury (AKI) had been believed to be a transient event, and recovery from AKI had been thought to lead to no consequences. However, recent epidemiological studies have shown that even if there is complete recovery of the kidney function, AKI can eventually result in chronic kidney disease (CKD) and eventually in end-stage kidney disease in the long term. Transition of AKI to CKD is mediated by multiple mechanisms, including aberrant cell cycle arrest and hypoxia. Hypoxia of the kidney is induced by rarefaction of the peritubular capillaries after AKI episodes, and induces inflammation and fibrosis...
June 9, 2017: Nephron
https://www.readbyqxmd.com/read/28566479/targeted-exome-sequencing-identifies-pbx1-as-involved-in-monogenic-congenital-anomalies-of-the-kidney-and-urinary-tract
#5
Laurence Heidet, Vincent Morinière, Charline Henry, Lara De Tomasi, Madeline Louise Reilly, Camille Humbert, Olivier Alibeu, Cécile Fourrage, Christine Bole-Feysot, Patrick Nitschké, Frédéric Tores, Marc Bras, Marc Jeanpierre, Christine Pietrement, Dominique Gaillard, Marie Gonzales, Robert Novo, Elise Schaefer, Joëlle Roume, Jelena Martinovic, Valérie Malan, Rémi Salomon, Sophie Saunier, Corinne Antignac, Cécile Jeanpierre
Congenital anomalies of the kidney and urinary tract (CAKUT) occur in three to six of 1000 live births, represent about 20% of the prenatally detected anomalies, and constitute the main cause of CKD in children. These disorders are phenotypically and genetically heterogeneous. Monogenic causes of CAKUT in humans and mice have been identified. However, despite high-throughput sequencing studies, the cause of the disease remains unknown in most patients, and several studies support more complex inheritance and the role of environmental factors and/or epigenetics in the pathophysiology of CAKUT...
May 31, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28489601/cellular-senescence-senescence-associated-secretory-phenotype-and-chronic-kidney-disease
#6
REVIEW
Wen-Juan Wang, Guang-Yan Cai, Xiang-Mei Chen
Chronic kidney disease (CKD) is increasingly being accepted as a type of renal ageing. The kidney undergoes age-related alterations in both structure and function. To date, a comprehensive analysis of cellular senescence and senescence-associated secretory phenotype (SASP) in CKD is lacking. Hence, this review mainly discusses the relationship between the two phenomena to show the striking similarities between SASP and CKD-associated secretory phenotype (CASP). It has been reported that replicative senescence, stress-induced premature ageing, and epigenetic abnormalities participate in the occurrence and development of CKD...
April 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28487070/noncoding-rna-and-epigenetic-gene-regulation-in-renal-diseases
#7
REVIEW
Satya K Kota, Savithri B Kota
Kidneys have a major role in normal physiology and metabolic homeostasis. Loss or impairment of kidney function is a common occurrence in several metabolic disorders, including hypertension and diabetes. Chronic kidney disease (CKD) affect nearly 10% of the population worldwide; ranks 18th in the list of causes of death; and contributes to a significant proportion of healthcare costs. The tissue repair and regenerative potential of kidneys are limited and they decline during aging. Recent studies have demonstrated a key role for epigenetic processes and players, such as DNA methylation, histone modifications, noncoding (nc)RNA, and so on, in both kidney development and disease...
May 6, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28468297/hypoxia-hif-and-associated-signaling-networks-in-chronic-kidney-disease
#8
REVIEW
Jing Liu, Qingqing Wei, Chunyuan Guo, Guie Dong, Yu Liu, Chengyuan Tang, Zheng Dong
The pathogenesis of chronic kidney disease (CKD) is complex and apparently multifactorial. Hypoxia or decrease in oxygen supply in kidney tissues has been implicated in CKD. Hypoxia inducible factors (HIF) are a small family of transcription factors that are mainly responsive to hypoxia and mediate hypoxic response. HIF plays a critical role in renal fibrosis during CKD through the modulation of gene transcription, crosstalk with multiple signaling pathways, epithelial-mesenchymal transition, and epigenetic regulation...
April 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28285987/tgf%C3%AE-incurred-epigenetic-aberrations-of-mirna-and-dna-methyltransferase-suppress-klotho-and-potentiate-renal-fibrosis
#9
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 exclusively established. Here we investigate the epigenetic mechanism of Klotho deficiency and its functional relevance in renal fibrogenesis...
March 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28228736/stress-signal-network-between-hypoxia-and-er-stress-in-chronic-kidney-disease
#10
REVIEW
Hiroshi Maekawa, Reiko Inagi
Chronic kidney disease (CKD) is characterized by an irreversible decrease in kidney function and induction of various metabolic dysfunctions. Accumulated findings reveal that chronic hypoxic stress and endoplasmic reticulum (ER) stress are involved in a range of pathogenic conditions, including the progression of CKD. Because of the presence of an arteriovenous oxygen shunt, the kidney is thought to be susceptible to hypoxia. Chronic kidney hypoxia is induced by a number of pathogenic conditions, including renal ischemia, reduced peritubular capillary, and tubulointerstitial fibrosis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28213404/hydrogen-sulfide-alleviates-hypertensive-kidney-dysfunction-through-an-epigenetic-mechanism
#11
Gregory J Weber, Sathnur B Pushpakumar, Utpal Sen
Hypertension is a major risk factor for chronic kidney disease (CKD), and renal inflammation is an integral part in this pathology. Hydrogen sulfide (H2S) has been shown to mitigate renal damage through reduction in blood pressure and ROS; however, the exact mechanisms are not clear. While several studies have underlined the role of epigenetics in renal inflammation and dysfunction, the mechanisms through which epigenetic regulators play a role in hypertension are not well defined. In this study, we sought to identify whether microRNAs are dysregulated in response to angiotensin II (ANG II)-induced hypertension in the kidney and whether a H2S donor, GYY4137, could reverse the microRNA alteration and kidney function...
May 1, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28105334/chronic-kidney-disease-in-children-and-the-role-of-epigenetics-future-therapeutic-trajectories
#12
Samuel N Uwaezuoke, Henrietta U Okafor, Vivian N Muoneke, Odutola I Odetunde, Chioma L Odimegwu
Global differences in the observed causes of chronic kidney disease (CKD) in children are well documented and are attributed to dissimilarities in clime, race, hereditary, and ancestry. Thus, familial clustering and disparities in CKD prevalence rates across ethnic and racial groups indicate that the progression of renal disease has a strong genetic component. Mammalian studies have demonstrated a feasible nexus between nutrition and non-genetic exposure (around the time of conception and in epigenetic changes) in the expression of major genes identified in renal organogenesis...
December 2016: Biomedical Reports
https://www.readbyqxmd.com/read/28097824/mechanisms-of-metabolic-memory-and-renal-hypoxia-as-a-therapeutic-target-in-diabetic-kidney-disease
#13
REVIEW
Yosuke Hirakawa, Tetsuhiro Tanaka, Masaomi Nangaku
Diabetic kidney disease (DKD) is a worldwide public health problem. The definition of DKD is under discussion. Although the term DKD was originally defined as 'kidney disease specific to diabetes,' DKD frequently means chronic kidney disease with diabetes mellitus and includes not only classical diabetic nephropathy, but also kidney dysfunction as a result of nephrosclerosis and other causes. Metabolic memory plays a crucial role in the progression of various complications of diabetes, including DKD. The mechanisms of metabolic memory in DKD are supposed to include advanced glycation end-products, deoxyribonucleic acid methylation, histone modifications and non-coding ribonucleic acid including micro ribonucleic acid...
May 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27887750/chronic-kidney-disease
#14
REVIEW
Angela C Webster, Evi V Nagler, Rachael L Morton, Philip Masson
The definition and classification of chronic kidney disease (CKD) have evolved over time, but current international guidelines define this condition as decreased kidney function shown by glomerular filtration rate (GFR) of less than 60 mL/min per 1·73 m(2), or markers of kidney damage, or both, of at least 3 months duration, regardless of the underlying cause. Diabetes and hypertension are the main causes of CKD in all high-income and middle-income countries, and also in many low-income countries. Incidence, prevalence, and progression of CKD also vary within countries by ethnicity and social determinants of health, possibly through epigenetic influence...
March 25, 2017: Lancet
https://www.readbyqxmd.com/read/27789733/cigarette-smoking-causes-epigenetic-changes-associated-with-cardiorenal-fibrosis
#15
Christopher A Drummond, Laura E Crotty Alexander, Steven T Haller, Xiaoming Fan, Jeffrey X Xie, David J Kennedy, Jiang Liu, Yanling Yan, Dawn-Alita Hernandez, Denzil P Mathew, Christopher J Cooper, Joseph I Shapiro, Jiang Tian
Clinical studies indicate that smoking combustible cigarettes promotes progression of renal and cardiac injury, leading to functional decline in the setting of chronic kidney disease (CKD). However, basic studies using in vivo small animal models that mimic clinical pathology of CKD are lacking. To address this issue, we evaluated renal and cardiac injury progression and functional changes induced by 4 wk of daily combustible cigarette smoke exposure in the 5/6th partial nephrectomy (PNx) CKD model. Molecular evaluations revealed that cigarette smoke significantly (P < 0...
December 1, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/27766038/indoxyl-sulfate-enhance-the-hypermethylation-of-klotho-and-promote-the-process-of-vascular-calcification-in-chronic-kidney-disease
#16
Jing Chen, Xiaoyan Zhang, Han Zhang, Tongqiang Liu, Hui Zhang, Jie Teng, Jun Ji, Xiaoqiang Ding
Chronic kidney disease (CKD) is a state of Klotho deficiency. The Klotho expression may be suppressed due to DNA hypermethylation in cancer cells so we have investigated the effects and possible mechanisms by which Klotho expression is regulated in human aortic smooth muscle cells (HASMCs). The vascular Klotho hypermethylation in radial arteries of patients with end-stage renal disease was described. Cultured HASMCs and 5/6-nephrectomized Sprague Dawley (SD) rats treated with indoxyl sulfate (IS) were used as in vitro and in vivo models, respectively...
2016: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/27760772/downregulation-of-kidney-protective-factors-by-inflammation-role-of-transcription-factors-and-epigenetic-mechanisms
#17
REVIEW
Olga Ruiz-Andres, Maria Dolores Sanchez-Niño, Juan Antonio Moreno, Marta Ruiz-Ortega, Adrian Mario Ramos, Ana Belen Sanz, Alberto Ortiz
Chronic kidney disease (CKD) is associated to an increased risk of death, CKD progression, and acute kidney injury (AKI) even from early stages, when glomerular filtration rate (GFR) is preserved. The link between early CKD and these risks is unclear, since there is no accumulation of uremic toxins. However, pathological albuminuria and kidney inflammation are frequent features of early CKD, and the production of kidney protective factors may be decreased. Indeed, Klotho expression is already decreased in CKD category G1 (normal GFR)...
December 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27760046/the-long-noncoding-rna-tug1-connects-metabolic-changes-with-kidney-disease-in-podocytes
#18
Szu Yuan Li, Katalin Susztak
An increasing amount of evidence suggests that metabolic alterations play a key role in chronic kidney disease (CKD) pathogenesis. In this issue of the JCI, Long et al. report that the long noncoding RNA (lncRNA) taurine-upregulated 1 (Tug1) contributes to CKD development. The authors show that Tug1 regulates mitochondrial function in podocytes by epigenetic targeting of expression of the transcription factor PPARγ coactivator 1α (PGC-1α, encoded by Ppargc1a). Transgenic overexpression of Tug1 specifically in podocytes ameliorated diabetes-induced CKD in mice...
November 1, 2016: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27703201/rhein-reversal-of-dna-hypermethylation-associated-klotho-suppression-ameliorates-renal-fibrosis-in-mice
#19
Qin Zhang, Shasha Yin, Lin Liu, Zhihong Liu, Wangsen Cao
Renal fibrosis is the hallmark of chronic kidney diseases (CKD) and its development and progression are significantly affected by epigenetic modifications. Rhein, a plant-derived anthraquinone, displays strong anti-fibrosis properties, but its protective mode of action remains incompletely understood. Here we explore the mechanism of Rhein anti-renal fibrosis by investigating its regulation of Klotho, a known renal anti-fibrotic protein whose suppression after renal injury reportedly involves aberrant DNA methylation...
October 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27692563/low-dose-hydralazine-prevents-fibrosis-in-a-murine-model-of-acute-kidney-injury-to-chronic-kidney-disease-progression
#20
Björn Tampe, Ulrike Steinle, Désirée Tampe, Julienne L Carstens, Peter Korsten, Elisabeth M Zeisberg, Gerhard A Müller, Raghu Kalluri, Michael Zeisberg
Acute kidney injury (AKI) and progressive chronic kidney disease (CKD) are intrinsically tied syndromes. In this regard, the acutely injured kidney often does not achieve its full regenerative capacity and AKI directly transitions into progressive CKD associated with tubulointerstitial fibrosis. Underlying mechanisms of such AKI-to-CKD progression are still incompletely understood and specific therapeutic interventions are still elusive. Because epigenetic modifications play a role in maintaining tissue fibrosis, we used a murine model of ischemia-reperfusion injury to determine whether aberrant promoter methylation of RASAL1 contributes causally to the switch between physiological regeneration and tubulointerstitial fibrogenesis, a hallmark of AKI-to-CKD progression...
January 2017: Kidney International
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