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https://www.readbyqxmd.com/read/28445401/tradeoff-in-the-nephron-a-theory-to-explain-the-primacy-of-phosphate-in-the-pathogenesis-of-secondary-hyperparathyroidism
#1
Kenneth R Phelps
Chronic kidney disease (CKD) causes secondary hyperparathyroidism (SHPT). The cardinal features of SHPT are persistence of normocalcemia as CKD progresses and dependence of the parathyroid hormone concentration ([PTH]) on phosphate influx (IP). The tradeoff-in-the-nephron hypothesis integrates these features. It states that as the glomerular filtration rate (GFR) falls, the phosphate concentration ([P]CDN) rises in the cortical distal nephron, the calcium concentration ([Ca]CDN) in that segment falls, and [PTH] rises to maintain normal calcium reabsorption per volume of filtrate (TRCa/GFR)...
April 26, 2017: Nutrients
https://www.readbyqxmd.com/read/28444791/trialling-nutrient-recommendations-for-slow-lorises-nycticebus-spp-based-on-wild-feeding-ecology
#2
F Cabana, E Dierenfeld, W Wirdateti, G Donati, K A I Nekaris
Slow loris (Nycticebus spp.) captive diets have been based on routine and anecdotes rather than scientific fact. The growing body of evidence contradicts the high fruit diet supported by such anecdotes. Non-human primate nutrient requirements are grouped into new (based on the common marmoset Callithrix jacchus) or old world (based on rhesus macaques Macaca mulatta) primates. Slow lorises are known to suffer from many health ailments in captivity such as dental disease, obesity, wasting and kidney issues all of which have been linked to diet...
April 26, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28443950/chronic-kidney-disease-determinants-of-progression-and-cardiovascular-risk-progredir-cohort-study-design-and-methods
#3
Maria Alice Muniz Domingos, Alessandra Carvalho Goulart, Paulo Andrade Lotufo, Isabela Judith Martins Benseñor, Silvia Maria de Oliveira Titan
CONTEXT AND OBJECTIVE: Chronic kidney disease (CKD) has become an important public health issue. The socioeconomic burden of renal replacement therapy (RRT) is very high, as is CKD-related cardiovascular mortality and morbidity. Preventive and therapeutic measures only have modest impact and more research is needed. Few cohort studies have been conducted on populations with CKD. Our aim was to establish a cohort that would include more advanced forms of CKD (stages 3 and 4). Data collection was focused on renal and cardiovascular parameters...
April 20, 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/28442375/implication-of-hyperoxaluria-on-osteopontin-and-er-stress-mediated-apoptosis-in-renal-tissue-of-rats
#4
Rishi Bhardwaj, Ankita Bhardwaj, Chanderdeep Tandon, Devinder K Dhawan, Rakesh Kumar Bijarnia, Tanzeer Kaur
Hyperoxaluria is a stress that leads to calcium oxalate crystal deposition which further causes inflammation and renal cell necroptosis. Many studies have linked osteopontin expression with apoptosis and inflammation but so far its association with apoptosis with regard to hyperoxaluria is undiscovered. Moreover, a recent report has suggested that osteopontin induces endoplasmic reticulum stress and subsequently apoptosis in myocytes. In this study, the impact of hyperoxaluria on the modulation of osteopontin expression and endoplasmic reticulum (ER) stress mediated apoptosis in rats is explored...
April 22, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28439382/association-between-adiponectin-and-insulin-resistance-in-diabetic-urolithiasis
#5
Dona Devasia, Kavitha Meiyappan, Palani Selvam Mohanraj, Dorairajan Lalgudi Narayanan, Gandhipuram Periyasamy Senthilkumar, Md Yasir
OBJECTIVES: The prevalence of urolithiasis is increasing worldwide. Diabetes mellitus (DM) is characterized by insulin resistance, which increases the risk of kidney stone formation. Adiponectin is an insulin-sensitizing and anti-inflammatory cytokine, which is known to improve glucose tolerance and insulin resistance in humans. The association of insulin and adiponectin with kidney stones is not clear. Hence, the present study aim to assess the serum levels of adiponectin and insulin resistance in DM patients with urolithiasis in comparison to those without...
March 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28437620/american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-guidelines-for-management-of-dyslipidemia-and-prevention-of-cardiovascular-disease
#6
Paul S Jellinger, Yehuda Handelsman, Paul D Rosenblit, Zachary T Bloomgarden, Vivian A Fonseca, Alan J Garber, George Grunberger, Chris K Guerin, David S H Bell, Jeffrey I Mechanick, Rachel Pessah-Pollack, Kathleen Wyne, Donald Smith, Eliot A Brinton, Sergio Fazio, Michael Davidson
OBJECTIVE: The development of these guidelines is mandated by the American Association of Clinical Endocrinologists (AACE) Board of Directors and American College of Endocrinology (ACE) Board of Trustees and adheres with published AACE protocols for the standardized production of clinical practice guidelines (CPGs). METHODS: Recommendations are based on diligent reviews of the clinical evidence with transparent incorporation of subjective factors, according to established AACE/ACE guidelines for guidelines protocols...
April 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28435765/chronic-nephropathy-from-dietary-hyperoxaluria-sustained-improvement-of-renal-function-after-dietary-intervention
#7
Yijuan Sun, Bruce L Horowitz, Karen S Servilla, Joanna R Fair, Darlene Vigil, Kavitha Ganta, Larry Massie, Antonios H Tzamaloukas
A 56-year-old man with stable chronic kidney disease (CKD) for two years following a single episode of calcium oxalate urolithiasis developed progressive elevation of his serum creatinine concentration. Urinalysis revealed pyuria and white cell casts, a few red blood cells, minimal proteinuria, and no crystals. Urine culture was sterile. Gallium scintigraphy was consistent with interstitial nephritis. Proton pump inhibitor intake was discontinued, and a short course of oral corticosteroids was initiated. Percutaneous kidney biopsy, performed because of the continued deterioration of renal function to a minimum estimated glomerular filtration rate (eGFR) value of 15 mL/min per 1...
March 20, 2017: Curēus
https://www.readbyqxmd.com/read/28435742/immobilisation-induced-hypercalcemia-following-spinal-cord-injury-affecting-the-kidney-function-in-two-young-native-greenlanders
#8
Michael V Linstow, Fin Biering-Sørensen
INTRODUCTION: Immobilisation-induced hypercalcemia following SCI affecting the kidney function, is a rare but potentially serious condition. We report immobilisation-induced hypercalcemia affecting the kidney function in two young native Greenlanders with spinal cord injury (SCI). CASE PRESENTATIONS: Two 15- and 24-year-old male native Greenlanders, both with traumatic C5 SCI were admitted to our spinal cord unit. They were non-smokers without history of daily alcohol intake pre- or immediately post-injury...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28435134/association-of-calcitonin-receptor-gene-calcr-polymorphism-with-kidney-stone-disease-in-the-population-of-west-bengal-india
#9
Pubali Mitra, Manalee Guha, Sudakshina Ghosh, Sourav Mukherjee, Biswabandhu Bankura, Dilip Kumar Pal, Biswanath Maity, Madhusudan Das
Kidney Stone Disease (KSD) is a complex urologic disorder with strong genetic constituent. Earlier association studies have indicated that the genetic polymorphisms are the potential cause of stone materialization; however unfortunately, the actual genetic signature is still unknown. Therefore, present study was aimed to investigate the potential contribution of two important polymorphisms of calcitonin receptor gene (CALCR): (i) rs1801197 (Leu447Pro) and (ii) rs1042138 (3'UTR+18C>T) in renal stone formation...
April 20, 2017: Gene
https://www.readbyqxmd.com/read/28433992/the-aachen-minipig-phenotype-genotype-hematological-and-biochemical-characterization-and-comparison-to-the-g%C3%A3-ttingen-minipig
#10
Kerstin Pawlowsky, Lisa Ernst, Julia Steitz, Thaddäus Stopinski, Babette Kögel, Anna Henger, Reinhart Kluge, René Tolba
BACKGROUND: The pig is one of the most frequently used large animal models for biomedical research, especially in the field of translational research and surgical models. While standard livestock breeds are used in short-term and acute studies, minipig breeds are the preferred breeds in long-term and chronic studies due to their limited growth and body weight. OBJECTIVE: In consideration of the 3R principle (refinement, reduction, replacement) and the increasing demand, the aim of this study was to generate a new, robust, non-specific-pathogen-free minipig breed, the Aachen minipig...
April 22, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/28431568/a-case-report-of-severe-calciphylaxis-suggested-approach-for-diagnosis-and-treatment
#11
Margret Patecki, Gabriele Lehmann, Jan Hinrich Bräsen, Jessica Schmitz, Anna Bertram, Lars Daniel Berthold, Hermann Haller, Wilfried Gwinner
BACKGROUND: Calciphylaxis is a serious complication in patients with chronic kidney disease associated mineral and bone disorder. It can occur in conditions with low and high bone turnover. So far, there are no definite diagnostic and therapeutic guidelines which may prevent the devastating outcome in many calciphylaxis patients. We report a case which clearly illustrates that knowledge of the underlying bone disorder is essential for a directed treatment. Based on this experience we discuss a systematic diagnostic and therapeutic approach in patients with calciphylaxis...
April 21, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28429560/is-there-a-role-for-newer-biomarkers-in-chronic-kidney-disease-mineral-and-bone-disorder-management
#12
Sven-Jean Tan, Michael Mx Cai
The current management of Chronic Kidney Disease-Mineral Bone Disorder (CKD-MBD) relies largely on clinical judgement and assessment of biochemical parameters including serum calcium, phosphate and intact parathyroid hormone concentrations. In the past two decades, there has been a leap in the understanding of the pathophysiology of CKD-MBD, leading to the discovery of novel biomarkers. The potential utility of these markers in this clinical setting is an area of intense investigation. In the absence of any guidelines aiding the clinician's understanding and application of these markers, we summarise the current available literature surrounding fibroblast growth factor-23, α-Klotho, sclerostin and serum calcification propensity testing and their respective assays in the context of CKD-MBD management...
March 2017: Nephrology
https://www.readbyqxmd.com/read/28429551/the-role-of-calcium-and-non-calcium-based-phosphate-binders-in-chronic-kidney-disease
#13
Grahame J Elder, Jacqueline Center
Rising levels of serum phosphate occur late in the course of chronic kidney disease (CKD) and have been easy targets for nephrologists to treat using phosphate binding drugs, as well as fertile ground for the pharmaceutical industry, for meta-analysis and for the earnest pontifications of guideline writers. Unfortunately, the evidence does little to support this focus, which might be better applied to earlier, adaptive hormonal changes, and to phosphate balance rather than serum phosphate levels. Nevertheless, phosphate binders are ubiquitously prescribed to patients on dialysis, and often prescribed to patients with earlier stages of CKD; for which there is no evidence of benefit and some evidence that calcium-based binders (CBBs) and possibly non-CBBs may cause more harm than placebo...
March 2017: Nephrology
https://www.readbyqxmd.com/read/28426428/vascular-calcification-the-role-of-micrornas
#14
Stelina Alkagiet, Konstantinos Tziomalos
Vascular calcification represents the deposition of calcium phosphate salts in the tunica media of the vascular wall. It occurs during aging but is accelerated and pronounced in patients with diabetes mellitus, chronic kidney disease (CKD) and established cardiovascular disease. Due to the loss of elasticity of the vessel wall, vascular calcification might result in left ventricular hypertrophy and compromise coronary perfusion. Accordingly, several studies showed that vascular calcification is associated with increased risk for cardiovascular morbidity and mortality...
April 20, 2017: Biomolecular Concepts
https://www.readbyqxmd.com/read/28422762/silencing-smoc2-ameliorates-kidney-fibrosis-by-inhibiting-fibroblast-to-myofibroblast-transformation
#15
Casimiro Gerarduzzi, Ramya K Kumar, Priyanka Trivedi, Amrendra K Ajay, Ashwin Iyer, Sarah Boswell, John N Hutchinson, Sushrut S Waikar, Vishal S Vaidya
Secreted modular calcium-binding protein 2 (SMOC2) belongs to the secreted protein acidic and rich in cysteine (SPARC) family of matricellular proteins whose members are known to modulate cell-matrix interactions. We report that SMOC2 is upregulated in the kidney tubular epithelial cells of mice and humans following fibrosis. Using genetically manipulated mice with SMOC2 overexpression or knockdown, we show that SMOC2 is critically involved in the progression of kidney fibrosis. Mechanistically, we found that SMOC2 activates a fibroblast-to-myofibroblast transition (FMT) to stimulate stress fiber formation, proliferation, migration, and extracellular matrix production...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28422036/physicochemical-factors-of-the-urine-of-children-with-hypercalciuria
#16
Mercedes Ubetagoyena-Arrieta, Jorge Martínez Sáenz de Jubera, María Nieves Corera-Casty, Eduardo González Pérez-Yarza, Irati García-Albizua
OBJECTIVE: Hypercalciuria is a common lithogenic risk factor. The aim of this study was, first, to study the characteristics of urine biochemical factors of children with hypercalciuria (HC) and compare them with those of children without hypercalciuria. Second, to analyze the differences between children with HC and lithiasis (HCL) and children with HC and no lithiasis (HCNL). METHODS: The sample was composed by 111 cases with HC, divided into 2 groups: HCNL group, consisting of 93 cases with no personal history of kidney stones, and HCL group, 18 cases with personal history of kidney stones...
April 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28419560/fibroblast-growth-factor-23-concentration-in-dogs-with-chronic-kidney-disease
#17
L M Harjes, V J Parker, K Dembek, G S Young, L H Giovaninni, M M Kogika, D J Chew, R E Toribio
BACKGROUND: Chronic kidney disease (CKD) is associated with hyperphosphatemia, decreased vitamin D metabolite concentrations, and hyperparathyroidism. This syndrome is known as CKD-mineral bone disorder (CKD-MBD). Recently, it has been shown that an increase in fibroblast growth factor-23 (FGF-23) concentration is an early biomarker of CKD in people. It is an independent risk factor for both progression of renal disease and survival time in humans and cats with CKD. Information about FGF-23 in healthy dogs and those with CKD is lacking...
April 17, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28416732/prevalence-of-kidney-stones-and-associated-risk-factors-in-the-shunyi-district-of-beijing
#18
Y G Jiang, L H He, G T Luo, X D Zhang
INTRODUCTION: Kidney stone formation is a multifactorial condition that involves interaction of environmental and genetic factors. Presence of kidney stones is strongly related to other diseases, which may result in a heavy economic and social burden. Clinical data on the prevalence and influencing factors in kidney stone disease in the north of China are scarce. In this study, we explored the prevalence of kidney stone and potentially associated risk factors in the Shunyi District of Beijing, China...
April 18, 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28416225/b-type-natriuretic-peptide-overexpression-ameliorates-hepatorenal-fibrocystic-disease-in%C3%A2-a%C3%A2-rat%C3%A2-model-of-polycystic-kidney-disease
#19
Sara J Holditch, Claire A Schreiber, Peter C Harris, Nicholas F LaRusso, Marina Ramirez-Alvarado, Alessandro Cataliotti, Vicente E Torres, Yasuhiro Ikeda
Polycystic kidney disease (PKD) involves progressive hepatorenal cyst expansion and fibrosis, frequently leading to end-stage renal disease. Increased vasopressin and cAMP signaling, dysregulated calcium homeostasis, and hypertension play major roles in PKD progression. The guanylyl cyclase A agonist, B-type natriuretic peptide (BNP), stimulates cGMP and shows anti-fibrotic, anti-hypertensive, and vasopressin-suppressive effects, potentially counteracting PKD pathogenesis. Here, we assessed the impacts of guanylyl cyclase A activation on PKD progression in a rat model of PKD...
April 14, 2017: Kidney International
https://www.readbyqxmd.com/read/28414758/early-dialysis-initiation-does-not-improve-clinical-outcomes-in-elderly-end-stage-renal-disease-patients-a-multicenter-prospective-cohort-study
#20
MULTICENTER STUDY
Jae Yoon Park, Kyung Don Yoo, Yong Chul Kim, Dong Ki Kim, Kwon Wook Joo, Shin-Wook Kang, Chul Woo Yang, Nam-Ho Kim, Yong-Lim Kim, Chun-Soo Lim, Yon Su Kim, Jung Pyo Lee
BACKGROUND: The optimal timing for initiating dialysis in end-stage renal disease (ESRD) is controversial, especially in the elderly. METHODS: 665 patients ≥65 years old who began dialysis from August 2008 to February 2015 were prospectively enrolled in the Clinical Research Center for End-Stage Renal Disease cohort study. Participants were divided into 2 groups based on the median estimated glomerular filtration rate at the initiation of dialysis. Propensity score matching (PSM) was used to compare the overall survival rate, cardiovascular events, Kidney Disease Quality of Life Short Form 36 (KDQOL-36) results, Karnofsky performance scale values, Beck's depression inventory values, and subjective global assessments...
2017: PloS One
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