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Microbiome And Chronic Kidney Disease

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https://www.readbyqxmd.com/read/30100156/moderate-renal-impairment-and-toxic-metabolites-produced-by-the-intestinal-microbiome-dietary-implications
#1
Michael Pignanelli, Chrysi Bogiatzi, Gregory Gloor, Emma Allen-Vercoe, Gregor Reid, Bradley L Urquhart, Kelsey N Ruetz, Thomas J Velenosi, J David Spence
OBJECTIVE: Toxic metabolites produced by the intestinal microbiome from animal proteins, carnitine (mainly from red meat), or phosphatidylcholine (mainly from egg yolk), have important adverse effects on cardiovascular disease. These are renally eliminated and may be termed gut-derived uremic toxins (GDUT). We hypothesized that even moderate renal impairment and intake of nutrient precursors would raise plasma levels of GDUT. DESIGN: A cohort study. SETTING: Academic medical center...
August 9, 2018: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29939312/intestinal-barrier-disruption-and-dysregulated-mucosal-immunity-contribute-to-kidney-fibrosis-in-chronic-kidney-disease
#2
Jihyun Yang, Sung Yoon Lim, Yoon Sook Ko, Hee Young Lee, Se Won Oh, Myung Gyu Kim, Won Yong Cho, Sang Kyung Jo
Background: Emerging evidence suggests that intestinal dysbiosis is associated with diverse pathological processes. In this study we demonstrated intestinal barrier disruption and aberrant mucosal immunity in 5/6 nephrectomized mice and the effect of probiotics on chronic kidney disease (CKD). Methods: CKD was induced in 6-week-old mice by 5/6 nephrectomy. They were fed a lactobacilli mixture for 8 weeks. Serum, urine and stool samples were collected for renal function assessments and gut microbiome analyses...
June 22, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29909116/altered-microrna-regulation-of-short-chain-fatty-acid-receptors-in-the-hypertensive-kidney-is-normalized-with-hydrogen-sulfide-supplementation
#3
REVIEW
Gregory J Weber, Jaleyea Foster, Sathnur B Pushpakumar, Utpal Sen
Hypertension affects nearly one third of the adult US population and is a significant risk factor for chronic kidney disease (CKD). An expanding body of recent studies indicates that gut microbiome has crucial roles in regulating physiological processes through, among other mechanisms, one mode of short chain fatty acids (SCFA) and their target receptors. In addition, these SCFA receptors are potential targets of regulation by host miRNAs, however, the mechanisms through which this occurs is not clearly defined...
August 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29847376/the-systems-biology-of-uric-acid-transporters-the-role-of-remote-sensing-and-signaling
#4
Sanjay K Nigam, Vibha Bhatnagar
PURPOSE OF REVIEW: Uric acid homeostasis in the body is mediated by a number of SLC and ABC transporters in the kidney and intestine, including several multispecific 'drug' transporters (e.g., OAT1, OAT3, and ABCG2). Optimization of uric acid levels can be viewed as a 'systems biology' problem. Here, we consider uric acid transporters from a systems physiology perspective using the framework of the 'Remote Sensing and Signaling Hypothesis.' This hypothesis explains how SLC and ABC 'drug' and other transporters mediate interorgan and interorganismal communication (e...
July 2018: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29728993/the-crosstalk-of-gut-microbiota-and-chronic-kidney-disease-role-of-inflammation-proteinuria-hypertension-and-diabetes-mellitus
#5
REVIEW
Mehmet Kanbay, Emine M Onal, Baris Afsar, Tuncay Dagel, Aslihan Yerlikaya, Adrian Covic, Nosratola D Vaziri
Chronic kidney disease (CKD) has been shown to result in profound changes in the composition and functions of the gut microbial flora which by disrupting intestinal epithelial barrier and generating toxic by-products contributes to systemic inflammation and the associated complications. On the other hand, emerging evidence points to the role of the gut microbiota in the development and progression of CKD by provoking inflammation, proteinuria, hypertension, and diabetes. These observations demonstrate the causal interconnection between the gut microbial dysbiosis and CKD...
May 4, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29725592/urinary-virome-perturbations-in-kidney-transplantation
#6
Tara K Sigdel, Neil Mercer, Sharvin Nandoe, Carrie D Nicora, Kristin Burnum-Johnson, Wei-Jun Qian, Minnie M Sarwal
The human microbiome is important for health and plays a role in essential metabolic functions and protection from certain pathogens. Conversely, dysbiosis of the microbiome is seen in the context of various diseases. Recent studies have highlighted that a complex microbial community containing hundreds of bacteria colonizes the healthy urinary tract, but little is known about the human urinary viruses in health and disease. To evaluate the human urinary virome in the context of kidney transplantation (tx), variations in the composition of the urinary virome were evaluated in urine samples from normal healthy volunteers as well as patients with kidney disease after they had undergone kidney tx...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29676858/effects-of-prebiotic-fiber-xylooligosaccharide-in-adenine-induced-nephropathy-in-mice
#7
Jieping Yang, Qing Li, Susanne M Henning, Jin Zhong, Mark Hsu, Rupo Lee, Jianfeng Long, Brenda Chan, Glenn T Nagami, David Heber, Zhaoping Li
SCOPE: This study evaluates the effect of the prebiotic fiber xylooligosaccharide (XOS) on kidney function and gut microbiome in mice with adenine-induced chronic kidney disease (CKD). METHOD AND RESULTS: Mice are fed the control diet containing adenine for 3 weeks to induce CKD and are switched to XOS supplemented (2 or 7%) or control diets for another 3 weeks. Mice with CKD exhibit increased blood urea nitrogen (BUN), creatinine, and kidney histopathology. XOS significantly reverses kidney injuries in CKD mice...
April 20, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29651696/diversity-of-the-midstream-urine-microbiome-in-adults-with-chronic-kidney-disease
#8
Holly Kramer, Gina Kuffel, Krystal Thomas-White, Alan J Wolfe, Kavitha Vellanki, David J Leehey, Vinod K Bansal, Linda Brubaker, Robert Flanigan, Julia Koval, Anuradha Wadhwa, Michael J Zilliox
PURPOSE: To examine the characteristics of the midstream urine microbiome in adults with stage 3-5 non-dialysis-dependent chronic kidney disease (CKD). METHODS: Patients with non-dialysis-dependent CKD (estimated glomerular filtration rate [eGFR] < 60 ml/min/1.73 m2 ) and diuretic use were recruited from outpatient nephrology clinics. Midstream voided urine specimens were collected using the clean-catch method. The bacterial composition was determined by sequencing the hypervariable (V4) region of the bacterial 16S ribosomal RNA gene...
June 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29602401/contributory-role-of-gut-microbiota-and-their-metabolites-toward-cardiovascular-complications-in-chronic-kidney-disease
#9
REVIEW
Daniel Y Li, W H Wilson Tang
The gut microbiome recently has emerged as a novel risk factor that impacts health and disease. Our gut microbiota can function as an endocrine organ through its unique ability to metabolize various dietary precursors, and can fuel the systemic inflammation observed in chronic disease. This is especially important in the setting of chronic kidney disease, in which microbial metabolism can contribute directly to accumulation of circulating toxins that then can alter and shift the balance of microbiota composition and downstream functions...
March 2018: Seminars in Nephrology
https://www.readbyqxmd.com/read/29559506/cross-talk-between-renal-lithogenesis-and-atherosclerosis-an-unveiled-link-between-kidney-stone-formation-and-cardiovascular-diseases
#10
REVIEW
Asokan Devarajan
The prevalence of kidney stones and cardiovascular diseases (CVDs) are increasing throughout the world. Both diseases are chronic and characterized by accumulation of oxidized proteins and lipids in the renal tissue and arterial wall, respectively. Emerging studies have revealed a positive association between nephrolithiasis and CVDs. Based on preclinical and clinical evidences, this review discusses: (i) stone forming risk factors, crystal nucleation, aggregation, injury-induced crystal retention, and stone formation, (ii) CVD risk factors such as dyslipidemia, perturbation of gut microbiome, obesity, free radical-induced lipoprotein oxidation, and retention in the arterial wall, subsequent foam cell formation, and atherosclerosis, (iii) mechanism by which stone forming risk factors such as oxalate, calcium, uric acid, and infection contribute toward CVDs, and (iv) how CVD risk factors, such as cholesterol, phospholipids, and uric acid, contribute to kidney stone formation are described...
March 30, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29523750/altered-microbiome-in-chronic-kidney-disease-systemic-effects-of-gut-derived-uremic-toxins
#11
REVIEW
Wei Ling Lau, Javad Savoj, Michael B Nakata, Nosratola D Vaziri
In chronic kidney disease (CKD), influx of urea and other retained toxins exerts a change in the gut microbiome. There is decreased number of beneficial bacteria that produce short-chain fatty acids, an essential nutrient for the colonic epithelium, concurrent with an increase in bacteria that produce uremic toxins such as indoxyl sulphate, p -cresyl sulphate, and trimethylamine-N-oxide (TMAO). Due to intestinal wall inflammation and degradation of intercellular tight junctions, gut-derived uremic toxins translocate into the bloodstream and exert systemic effects...
March 15, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29492783/altered-gut-microbiome-promotes-proteinuria-in-mice-induced-by-adriamycin
#12
Qian Jiang, Xiwei He, Yuntao Zou, Yin Ding, Huang Li, Huimei Chen
Inflammation has recently been attributed to dysbiosis of the gut microbiome, which has been linked to proteinuria in chronic kidney disease. Since Adriamycin® (ADR) is widely used to induce proteinuria in mouse models, the aim of this study was to explore the potential effect of gut microbiome on this process. Both ADR resistant (C57BL/6) and susceptible (BALB/C) strains were part of the induced nephropathy with ADR injection. BALB/C mice significantly presented increased urinary albumin/creatinine ratio (UACR) with renal lesions in pathology, but C57BL/6 mice were absent from kidney damage...
February 28, 2018: AMB Express
https://www.readbyqxmd.com/read/29465874/-gut-microbiota-and-kidney-diseases-dangerous-liaisons
#13
Arlène Ghajarzadeh-Wurzner, Maxime Berney, Daniel Teta, Laurence Genton, Menno Pruijm
Recent studies have found a relationship between the kidney and the intestinal microbiome, called the colo-renal axis. Mounting evidence suggests that patients suffering from chronic kidney disease (CKD) have an altered composition of gut microbiota. This leads to 1) the increased fermentation of intestinal proteins to uremic toxins such as p-cresyl sulphate and indoxyl sulphate, 2) an altered, more 'leaky' intestinal barrier, and 3) translocation of bacteria and toxins from the gut lumen to the circulation, inducing systemic inflammation...
February 21, 2018: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29444477/the-microbiome-in-chronic-kidney-disease-patients-undergoing-hemodialysis-and-peritoneal-dialysis
#14
REVIEW
Liliana Simões-Silva, Ricardo Araujo, Manuel Pestana, Isabel Soares-Silva, Benedita Sampaio-Maia
Chronic kidney disease (CKD) is associated with an imbalanced human microbiome due not only to CKD-associated factors such as uremia, increased inflammation and immunosuppression, but also to pharmacological therapies and dietary restrictions. End-stage renal disease patients require renal replacement therapies commonly in the form of hemodialysis (HD) or peritoneal dialysis (PD). HD implies the existence of a vascular access, such as an arteriovenous fistula/graft or a venous catheter, whereas PD implies a long-term peritoneal catheter and the constant inflow of peritoneal dialysate...
April 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29378252/gut-microbiota-hypertension-and-chronic-kidney-disease-recent-advances
#15
REVIEW
Antonio Sircana, Franco De Michieli, Renato Parente, Luciana Framarin, Nicola Leone, Mara Berrutti, Elena Paschetta, Daria Bongiovanni, Giovanni Musso
A large number of different microbial species populates intestine. Extensive research has studied the entire microbial population and their genes (microbiome) by using metagenomics, metatranscriptomics and metabolomic analysis. Studies suggest that the imbalances of the microbial community causes alterations in the intestinal homeostasis, leading to repercussions on other systems: metabolic, nervous, cardiovascular, immune. These studies have also shown that alterations in the structure and function of the gut microbiota play a key role in the pathogenesis and complications of Hypertension (HTN) and Chronic Kidney Disease (CKD)...
January 26, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29340331/location-specific-oral-microbiome-possesses-features-associated-with-ckd
#16
Jianzhong Hu, Srinivas Iragavarapu, Girish N Nadkarni, Ruiqi Huang, Monica Erazo, Xiuliang Bao, Divya Verghese, Steven Coca, Mairaj K Ahmed, Inga Peter
Introduction: Chronic kidney disease (CKD), a progressive loss of renal function, can lead to serious complications if underdiagnosed. Many studies suggest that the oral microbiota plays important role in the health of the host; however, little is known about the association between the oral microbiota and CKD pathogenesis. Methods: In this study, we surveyed the oral microbiota in saliva, the left and right molars, and the anterior mandibular lingual area from 77 participants (18 with and 59 without CKD), and tested their association with CKD to identify microbial features that may be predictive of CKD status...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29248242/plasma-microbiome-modulated-indole-and-phenyl-derived-metabolites-associate-with-advanced-atherosclerosis-and-postoperative-outcomes
#17
Cori A Cason, Kyle T Dolan, Gaurav Sharma, Ming Tao, Rohan Kulkarni, Irene B Helenowski, Brendan M Doane, Michael J Avram, Mary M McDermott, Eugene B Chang, C Keith Ozaki, Karen J Ho
OBJECTIVE: Multiple studies have shown that gut microbes contribute to atherosclerosis, and there is mounting evidence that microbial metabolism of dietary nutrients influences pathophysiology. We hypothesized that indole- and phenyl-derived metabolites that originate solely or in part from bacterial sources would differ between patients with advanced atherosclerosis and age- and sex-matched controls without clinically apparent atherosclerosis. METHODS: Plasma from the advanced atherosclerosis cohort (n = 100) was from patients who underwent carotid endarterectomy, open infrainguinal leg revascularization, or major leg amputation for critical limb ischemia...
December 13, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29159529/plasma-p-cresol-lowering-effect-of-sevelamer-in-non-dialysis-ckd-patients-evidence-from-a-randomized-controlled-trial
#18
Eleonora Riccio, Massimo Sabbatini, Dario Bruzzese, Lucia Grumetto, Cristina Marchetiello, Maria Amicone, Michele Andreucci, Bruna Guida, Davide Passaretti, Giacomo Russo, Antonio Pisani
BACKGROUND: The accumulation of p-cresol, a metabolic product of aromatic amino acids generated by intestinal microbiome, increases the cardiovascular risk in chronic kidney disease (CKD) patients. Therefore, therapeutic strategies to reduce plasma p-cresol levels are highly demanded. It has been reported that the phosphate binder sevelamer (SEV) sequesters p-cresol in vitro, while in vivo studies on dialysis patients showed controversial results. Aim of our study was to evaluate the effect of SEV on p-cresol levels in non-dialysis CKD patients...
June 2018: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29113918/the-impact-of-diabetes-on-corneal-nerve-morphology-and-ocular-surface-integrity
#19
REVIEW
Maria Markoulli, Judith Flanagan, Shyam Sunder Tummanapalli, Jenny Wu, Mark Willcox
Diabetes mellitus is a chronic disease that results from inadequate insulin production or ineffective insulin utilization. It is one of the most common systemic diseases worldwide with increasing prevalence. Diabetes mellitus is associated with premature mortality, macrovascular complications such as cardiovascular disease, and microvascular complications, including nephropathy leading to kidney failure, potentially blinding diabetic retinopathy, and diabetic neuropathy. While the retinal complications of diabetes are well recognized by eye care professionals, the effects on the ocular surface are poorly understood...
January 2018: Ocular Surface
https://www.readbyqxmd.com/read/29056165/the-leaky-gut-and-altered-microbiome-in-chronic-kidney-disease
#20
Wei Ling Lau, Nosratola D Vaziri
Chronic kidney disease results in disruption of the intestinal epithelial barrier as well as profound changes in the gut microbial flora. These events are largely mediated by (1) heavy influx of circulating urea to the gut lumen and (2) dietary restrictions of foods containing high fiber (such as fruits and vegetable) and symbiotic organisms (such as yogurt and cheese) imposed to mitigate hyperkalemia and hyperphosphatemia. Collectively, these factors promote systemic inflammation and cardiovascular morbidity by mediating microbial dysbiosis, disruption of the intestinal epithelial barrier, and translocation of endotoxin, bacterial fragments, and uremic toxins across the "leaky gut" into the bloodstream...
November 2017: Journal of Renal Nutrition
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