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Renal injury obesity

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https://www.readbyqxmd.com/read/27914707/adiponectin-alters-renal-calcium-and-phosphate-excretion-through-regulation-of-klotho-expression
#1
Joseph M Rutkowski, Johanne Pastor, Kai Sun, Sun K Park, I Alexandru Bobulescu, Christopher T Chen, Orson W Moe, Philipp E Scherer
The kidney controls systemic calcium and phosphate levels and disturbances of its control mechanisms can lead to a variety of diseases. The insulin-sensitizing adipokine adiponectin is renoprotective and accelerates functional recovery following renal injury. However, unlike other adipokines, adiponectin is reduced in obesity. High adiponectin levels are also correlated with bone loss, suggestive of an additional action in mineral metabolism. Using knockout, wild-type, and adiponectin-overexpressing transgenic mice, we sought to identify the mechanistic basis for adiponectin's ability to regulate calcium and phosphate balance at the level of the kidney...
November 30, 2016: Kidney International
https://www.readbyqxmd.com/read/27914704/kidney-outcomes-three-years-after-bariatric-surgery-in-severely-obese-adolescents
#2
Edward J Nehus, Jane C Khoury, Thomas H Inge, Nianzhou Xiao, Todd M Jenkins, Marva M Moxey-Mims, Mark M Mitsnefes
A significant number of severely obese adolescents undergoing bariatric surgery have evidence of early kidney damage. To determine if kidney injury is reversible following bariatric surgery, we investigated renal outcomes in the Teen-Longitudinal Assessment of Bariatric Surgery cohort, a prospective multicenter study of 242 severely obese adolescents undergoing bariatric surgery. Primary outcomes of urine albumin-to-creatinine ratio and cystatin C-based estimated glomerular filtration rate (eGFR) were evaluated preoperatively and up to 3 years following bariatric surgery...
November 30, 2016: Kidney International
https://www.readbyqxmd.com/read/27913299/the-inhibitory-effect-of-beta-lapachone-on-rankl-induced-osteoclastogenesis
#3
Dong Ryun Gu, Joon No Lee, Gi-Su Oh, Hyung Jin Kim, Min Seuk Kim, Seoung Hoon Lee
β-lapachone (β-L) is a substrate of reduced nicotinamide adenine dinucleotide (NADH): quinone oxidoreductase 1 (NQO1). NQO1 reduces quinones to hydroquinones using NADH as an electron donor and consequently increases the intracellular NAD+/NADH ratio. The activation of NQO1 by β-L has beneficial effects on several metabolic syndromes, such as obesity, hypertension, and renal injury. However, the effect of β-L on bone metabolism remains unclear. Here, we show that β-L might be a potent inhibitor of receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis...
November 30, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27884225/obesity-a-perspective-from-hypertension
#4
REVIEW
Dinko Susic, Jasmina Varagic
The prevalence of obesity-related hypertension is high worldwide and has become a major health issue. The mechanisms by which obesity relates to hypertensive disease are still under intense research scrutiny, and include altered hemodynamics, impaired sodium homeostasis, renal dysfunction, autonomic nervous system imbalance, endocrine alterations, oxidative stress and inflammation, and vascular injury. Most of these contributing factors interact with each other at multiple levels. Thus, as a multifactorial and complex disease, obesity-related hypertension should be recognized as a distinctive form of hypertension, and specific considerations should apply in planning therapeutic approaches to treat obese individuals with high blood pressure...
January 2017: Medical Clinics of North America
https://www.readbyqxmd.com/read/27837039/low-risk-for-local-and-systemic-complications-after-primary-repair-of-1626-achilles-tendon-ruptures
#5
Nicholas Rensing, Brian R Waterman, Rachel M Frank, Kenneth A Heida, Justin D Orr
INTRODUCTION: Historically, Achilles tendon repairs and other surgeries about the hindfoot have demonstrated a significantly higher rate of wound healing complications and surgical site morbidity. The purpose of this study was to evaluate the comprehensive complication profile and risk factors for adverse short-term, clinical outcomes after primary repair of Achilles tendon ruptures. METHODS: Between the years 2005 and 2014, all cases of primary Achilles tendon repair (Current Procedural Terminology code 27650) entered into the National Surgical Quality Improvement Project (NSQIP) database were extracted for analysis...
November 10, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27829066/galectin-3-blockade-reduces-renal-fibrosis-in-two-normotensive-experimental-models-of-renal-damage
#6
Ernesto Martinez-Martinez, Jaime Ibarrola, Laurent Calvier, Amaya Fernandez-Celis, Celine Leroy, Victoria Cachofeiro, Patrick Rossignol, Natalia Lopez-Andres
BACKGROUND: Galectin-3 (Gal-3), a β-galactoside-binding lectin, is increased in kidney injury and its pharmacological blockade reduces renal damage in acute kidney injury, hyperaldosteronism or hypertensive nephropathy. We herein investigated the effects of pharmacological Gal-3 inhibition by modified citrus pectin (MCP) in early renal damage associated with obesity and aortic stenosis (AS). RESULTS: Gal-3 was upregulated in kidneys from high fat diet (HFD) rats and in animals with partial occlusion of ascending aorta (AS)...
2016: PloS One
https://www.readbyqxmd.com/read/27827416/obesity-induced-kidney-injury-is-attenuated-by-amelioration-of-aberrant-phd2-activation-in-proximal-tubules
#7
Koji Futatsugi, Hirobumi Tokuyama, Shinsuke Shibata, Makiko Naitoh, Takeshi Kanda, Hitoshi Minakuchi, Shintaro Yamaguchi, Koichi Hayashi, Yoji Andrew Minamishima, Motoko Yanagita, Shu Wakino, Hiroshi Itoh
The involvement of tissue ischemia in obesity-induced kidney injury remains to be elucidated. Compared with low fat diet (LFD)-mice, high fat diet (HFD)-fed mice became obese with tubular enlargement, glomerulomegaly and peritubular capillary rarefaction, and exhibited both tubular and glomerular damages. In HFD-fed mice, despite the increase in renal pimonidazole-positive areas, the expressions of the hypoxia-responsive genes such as Prolyl-hydroxylase PHD2, a dominant oxygen sensor, and VEGFA were unchanged indicating impaired hypoxic response...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27822672/obesity-acute-kidney-injury-and-outcome-of-critical-illness
#8
REVIEW
Helmut Schiffl, Susanne M Lang
Acute kidney injury is a heterogeneous clinical syndrome encompassing a spectrum of risk factors and acute insults, occurring in multiple settings and affecting both short-term and long-term outcomes. Obesity has become an epidemic. The available literature suggests that AKI is common in critically ill surgical or medical obese patients and that obesity is a novel risk factor for this acute renal syndrome. The pathophysiology of obesity-associated AKI is not completely understood. Obesity-related factors combined with the burden of other comorbidities in elderly obese patients may interact with known precipitating factors such as hypotension, nephrotoxins or sepsis and increase the susceptibility of this population to AKI...
November 7, 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27798458/the-angiotensin-type-2-receptor-and-the-kidney
#9
Antonio A B Peluso, Robson A S Santos, Thomas Unger, U Muscha Steckelings
PURPOSE OF REVIEW: Angiotensin II is a main regulator of kidney function. Renal actions mediated by the angiotensin AT1 receptor have been well known for many years. In contrast, several details of angiotensin AT2 receptor actions in kidney physiology and pathophysiology were only described very recently. These findings are reviewed in this article. RECENT FINDINGS: Regarding the role of the angiotensin AT2 receptor in kidney physiology, a major recent finding was that the AT2 receptor-mediated inhibition of Na-H exchanger-3 and Na/K-ATPase in the renal proximal tubules is caused by internalisation of these transporters, thus reducing reabsorption and increasing natriuresis/diuresis...
January 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27771702/role-of-the-renal-microcirculation-in-progression-of-chronic-kidney-injury-in-obesity
#10
Alejandro R Chade, John E Hall
Obesity is largely responsible for the growing incidence and prevalence of diabetes, cardiovascular and renal diseases. Current strategies to prevent and treat obesity and its consequences have been insufficient to reverse the ongoing trends. Lifestyle modification or pharmacological therapies often produce modest weight loss which is not sustained and recurrence of obesity is frequently observed, leading to progression of target organ damage in many obese subjects. Therefore, research efforts have focused not only on the factors that regulate energy balance, but also on understanding mechanisms of target organ injury in obesity...
2016: American Journal of Nephrology
https://www.readbyqxmd.com/read/27746455/early-and-late-acute-kidney-injury-in-severely-burned-patients
#11
Wojciech Witkowski, Marek Kawecki, Agnieszka Surowiecka-Pastewka, Wojciech Klimm, Katarzyna Szamotulska, Stanisław Niemczyk
BACKGROUND This study evaluated factors influencing early and late occurrence of AKI in severely burned patients and assessed the relationship between time of occurrence of AKI and mortality of AKI patients. MATERIAL AND METHODS Renal function was evaluated at 3 time points: at admission, at the critical point or middle point of hospitalization, and at the endpoint for which death or a discharge from the center was considered. AKI criteria were: decrease in GFR of less than 60 ml/min at admission, decrease in GFR of more than 75% compared to baseline, and decrease in the daily diuresis of less than 500 ml/24 h...
October 17, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27742195/mitochondrial-dysfunction-in-obesity-related-kidney-disease-a-novel-therapeutic-target
#12
Chengyuan Tang, Juan Cai, Zheng Dong
Lipid accumulation in renal cells has been implicated in the pathogenesis of obesity-related kidney disease, but the underlying mechanism is poorly understood. Szeto et al. now unravel a central role of mitochondrial dysfunction in a high fat diet-induced glomerulopathy and proximal tubular injury. Moreover, they demonstrate the renoprotective effect of SS31, a mitochondria-targeted antioxidant, in related models. Targeting mitochondria may offer a novel strategy for the therapy of obesity-related kidney disease...
November 2016: Kidney International
https://www.readbyqxmd.com/read/27736813/longitudinal-changes-in-measured-glomerular-filtration-rate-renal-fibrosis-and-biomarkers-in-a-rat-model-of-type-2-diabetic-nephropathy
#13
Zhi Su, Deborah Widomski, Ji Ma, Marian Namovic, Arthur Nikkel, Laura Leys, Lauren Olson, Katherine Salte, Diana Donnelly-Roberts, Timothy Esbenshade, Steve McGaraughty
BACKGROUND: Obese ZSF-1 rats display many features of human type II diabetes including nephropathy (DN). The study aimed to further understand the relevance of this model to DN, for which glomerular filtration rate (GFR), renal fibrosis and several urinary/tissue biomarkers was followed over 24 weeks in ZSF-1 rats. METHODS: Intact/sham or uninephrectomized male and female ZSF-1 rats were studied. GFR was measured by transdermal clearance of fluorescein isothiocyanate-sinistrin...
October 14, 2016: American Journal of Nephrology
https://www.readbyqxmd.com/read/27729946/status-of-stem-cells-in-diabetic-nephropathy-predictive-and-preventive-potentials
#14
Babak Baban, Jun Yao Liu, Samuel Payne, Worku Abebe, Jack C Yu, Mahmood S Mozaffari
BACKGROUND: Recruitment of stem cells to sites of tissue injury constitutes an important mechanism aimed at tissue repair and regeneration. However, it is not clear how the diabetic milieu affects the viability of endogenous stem cells. Thus, we tested the hypothesis that diabetes mellitus is associated with increased apoptosis which, in turn, contributes to reduction in stem cells and the manifestation of type 2 diabetic nephropathy. METHODS: Sixteen-week-old male obese type 2 diabetic db/db mice, and their appropriate controls, were used for assessment of the status of endothelial progenitor cells (EPCs), mesenchymal stem cells (MSCs), and hematopoetic stem cells (HSCs) in the peripheral blood and renal tissue using specific cell markers...
2016: EPMA Journal
https://www.readbyqxmd.com/read/27726116/how-central-obesity-influences-intra-abdominal-pressure-a-prospective-observational-study-in-cardiothoracic-surgical-patients
#15
Marije Smit, Maureen J M Werner, Annemieke Oude Lansink-Hartgring, Willem Dieperink, Jan G Zijlstra, Matijs van Meurs
BACKGROUND: Intra-abdominal hypertension (IAH) is frequently present in critically ill patients and is an independent predictor for mortality. Better recognition of clinically important thresholds is necessary. Increased intra-abdominal pressure (IAP) is associated with renal dysfunction, and renal failure is one of the most consistently described organ dysfunctions associated with IAH. Obesity is also associated with kidney injury. The underlying mechanisms are not yet fully understood...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27603155/epidemiology-of-fracture-nonunion-in-18-human-bones
#16
Robert Zura, Ze Xiong, Thomas Einhorn, J Tracy Watson, Robert F Ostrum, Michael J Prayson, Gregory J Della Rocca, Samir Mehta, Todd McKinley, Zhe Wang, R Grant Steen
Importance: Failure of bone fracture healing occurs in 5% to 10% of all patients. Nonunion risk is associated with the severity of injury and with the surgical treatment technique, yet progression to nonunion is not fully explained by these risk factors. Objective: To test a hypothesis that fracture characteristics and patient-related risk factors assessable by the clinician at patient presentation can indicate the probability of fracture nonunion. Design, Setting, and Participants: An inception cohort study in a large payer database of patients with fracture in the United States was conducted using patient-level health claims for medical and drug expenses compiled for approximately 90...
November 16, 2016: JAMA Surgery
https://www.readbyqxmd.com/read/27584009/mechanisms-underpinning-remission-of-albuminuria-following-bariatric-surgery
#17
Meera Nair, Carel W le Roux, Neil G Docherty
PURPOSE OF REVIEW: Albuminuria is a biomarker of renal injury commonly used to monitor progression of diabetic kidney disease. The appearance of excess albumin in the urine reflects alterations in the structure and permeability of the glomerular filtration barrier. The present article summarizes the clinical evidence base for remission of albuminuria after bariatric surgery. It furthermore focuses on how beneficial impacts on glomerular podocyte structure and function may explain this phenomenon...
October 2016: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/27581114/gluteal-compartment-syndrome-following-abdominal-aortic-aneurysm-treatment-case-report-and-review-of-the-literature
#18
Emanuela Viviani, Anna Maria Giribono, Donatella Narese, Doriana Ferrara, Giuseppe Servillo, Luca Del Guercio, Umberto Marcello Bracale
Compartment syndrome (CS) is a pathological increase of the interstitial pressure within the closed osseous fascial compartments. Trauma is the most common cause, followed by embolization, burns, and iatrogenic injuries; it usually involves the limbs. The major issue when dealing with CS is the possibility to do an early diagnosis in order to intervene precociously, through a fasciotomy, reducing the risk of tissue, vascular and nervous damage. Although it is an infrequent condition, it is potentially life threatening...
August 31, 2016: International Journal of Lower Extremity Wounds
https://www.readbyqxmd.com/read/27579698/mouse-models-of-diabetes-obesity-and-related-kidney-disease
#19
Sarah J Glastras, Hui Chen, Rachel Teh, Rachel T McGrath, Jason Chen, Carol A Pollock, Muh Geot Wong, Sonia Saad
Multiple rodent models have been used to study diabetic kidney disease (DKD). The purpose of the present study was to compare models of diabetes and obesity-induced metabolic syndrome and determine differences in renal outcomes. C57BL/6 male mice were fed either normal chow or high fat diet (HFD). At postnatal week 8, chow-fed mice were randomly assigned to low-dose streptozotocin (STZ, 55 mg/kg/day, five consecutive days) or vehicle control, whereas HFD-fed mice were given either one high-dose of STZ (100 mg/kg) or vehicle control...
2016: PloS One
https://www.readbyqxmd.com/read/27578194/the-influence-of-thyroid-function-inflammation-and-obesity-on-risk-prediction-of-acute-kidney-injury-by-cystatin-c-in-the-emergency-department
#20
Moritz Schanz, Dirk Pannes, Jürgen Dippon, Christoph Wasser, Mark Dominik Alscher, Martin Kimmel
BACKGROUND/AIMS: There is a growing role for emergency departments (ED) in assessing acute kidney injury (AKI) for hospital admissions but there are few studies addressing acute kidney injury biomarkers and confounding factors in the ED. Cystatin C (CysC), a newer renal biomarker, is influenced by thyroid function, inflammation and obesity. This study aims to be the first study to address the impact of these parameters in the ED. METHODS: Admitted patients (n=397) were enrolled in the ED at Robert-Bosch-Hospital, Stuttgart, Germany...
September 1, 2016: Kidney & Blood Pressure Research
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