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Hao Yan, Wei Fang, Aiwu Lin, Liou Cao, Zhaohui Ni, Jiaqi Qian
BACKGROUND: Incident patients treated with continuous ambulatory peritoneal dialysis (CAPD) are often prescribed either 3 or 4 exchanges per day. However, the effects on residual kidney function and clinical outcomes of 3 versus 4 exchanges are not known. STUDY DESIGN: Prospective, randomized, controlled, open-label study. SETTING & PARTICIPANTS: Incident CAPD patients aged 18 to 80 years with glomerular filtration rates (GFRs; mean of renal urea and creatinine clearance from a 24-hour urine collection) ≥ 2mL/min and urine volume ≥ 500mL/d...
October 14, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
Reem Alshaman, Luan Truong, Adebayo Oyekan
Despite the presence of many studies on the role of mechanistic target of rapamycin (mTOR) in cardiorenal tissues, the definitive role of mTOR in the pathogenesis of renal injury subsequent to ischemia-reperfusion (IR) remains unclear. The aims of the current study were to characterize the role of mTOR in normal kidney function and to investigate the role of mTOR activation in IR-induced kidney injury. In euvolemic anesthetized rats, treatment with the mTOR inhibitor rapamycin increased blood pressure (121±2 to 144±3 mmHg; P<0...
August 24, 2016: Clinical and Experimental Pharmacology & Physiology
Aya Uchida, Yoshiakira Kanai
This article contains the data related to the research article "in vivo dynamics of GFRα1-positive spermatogonia stimulated by GDNF signals using a bead transplantation assay" (Uchida et al., 2016) [1]. A novel transplantation assay of growth factor-soaked beads into the mammalian testicular interstitium was developed, in order to examine the effects of various soluble factors on in vivo dynamics of the spermatogonia including spermatogonial stem cells (SSC). Here we provide the image data of GFRα1-positive stem/progenitor spermatogonia in mouse seminiferous tubules near the beads soaked in GDNF (glial cell-derived neurotrophic factor), one of the SSC niche factors...
September 2016: Data in Brief
Clara Ortega-de San Luis, Alberto Pascual
Glial cell line-derived neurotrophic factor (GDNF) is proposed as a therapeutic tool in Parkinson's disease, addiction-related disorders, and neurodegenerative conditions affecting motor neurons (MNs). Despite the high amount of work about GDNF therapeutic application, the neuronal circuits requiring GDNF trophic support in the brain and spinal cord (SC) are poorly characterized. Here, we defined GDNF and GDNF family receptor-α 1 (GFRα1) expression pattern in the brain and SC of newborn and adult mice. We performed systematic and simultaneous detection of EGFP and LacZ expressing alleles in reporter mice and asked whether modifications of this signaling pathway lead to a significant central nervous system (CNS) alteration...
2016: Frontiers in Neuroanatomy
Yuan-Yuan Gao, Xiao-Ya Hong, Hong-Jun Wang
Neuropathic pain results from nerve injury and is one of the most refractory disorders. Recently, many studies reported that glial cell-derived neurotrophic factor (GDNF) exhibited potent analgesic effects, but the underlying mechanisms still remain unknown. In addition to the classical GDNF-GFRα1-Ret pathway, GDNF can bind to adhesion proteins such as E-cadherin and NCAM via GFRα1 in a Ret-independent way. In this study, we aimed to examine whether the adhesion protein nectin-1 and its downstream protein c-Src are involved in neuropathic pain...
October 2016: Journal of Molecular Neuroscience: MN
Miguel Pérez Fontán, César Remón Rodríguez, Marta da Cunha Naveira, Mercè Borràs Sans, Carmen Rodríguez Suárez, Pedro Quirós Ganga, Emilio Sánchez Alvarez, Ana Rodríguez-Carmona
BACKGROUND: Baseline residual kidney function (RKF) and its rate of decline during follow-up are purported to be reliable outcome predictors of patients undergoing Peritoneal Dialysis (PD). The independent contribution of each of these factors has not been elucidated. METHOD: We report a multicenter, longitudinal study of 493 patients incident on PD and satisfying two conditions: a glomerular filtration rate (GFR) ≥1 mL/minute and a daily diuresis ≥300 mL. The main variables were the GFR (mean of urea and creatinine clearances) at PD inception and the GFR rate of decline during follow-up...
2016: PloS One
H Cai, B Tang, J Y Wu, X X Zhao, Z Z Wang, X L An, L X Lai, Z Y Li, X M Zhang
Enrichment and propagation of gonocytes or spermatogonial stem cells (SSCs) from cryopreserved testicular tissue is essential to apply SSCs-related techniques in large domestic animals. We previously reported the cryopreservation of adult bovine testicular tissue. Here, we conducted the enrichment and culture of putative gonocytes from cryopreserved testicular tissues of post-natal 1-day-old bulls. The testicular structure was well maintained after freezing and thawing. Higher mRNA levels of gonocyte/SSCs markers (PLZF, GFRα1, and UCHL-1) than those of pluripotency genes (Oct4, Sox2, and Nanog) were detected in the frozen-thawed sex cords...
July 1, 2016: Andrology
Mohamed A Adly, Hanan A Assaf, Mahmoud Rezk Abdelwahed Hussein
Glial cell line-derived neurotrophic factor (GDNF) and its cognate receptor (GFRα-1) are expressed in normal human skin. They are involved in murine hair follicle morphogenesis and cycling control. We hypothesize that 'GDNF and GFRα-1 protein expression in human skin undergoes age-associated alterations. To test our hypothesis, the expression of these proteins was examined in human skin specimens obtained from 30 healthy individuals representing three age groups: children (5-18 years), adults (19-60 years) and the elderly (61-81 years)...
June 2016: International Journal of Experimental Pathology
Kyung Hoon Lee, Won Young Lee, Jung Tae Do, Chan Kyu Park, Nam Hyung Kim, Jin Hoi Kim, Hak Jae Chung, Dong Woon Kim, Hyuk Song
Embryonic body-like colony formation is a unique pattern in male germ cell cultures, including spermatogonial stem cells. However, detailed information of the colony formation has not yet been sufficiently reported in male germ cell culture. To elucidate the formation of germ cell-derived colony (GDC), glial cell-derived neurotrophic factor receptor alpha-1 (GFRα-1)-positive pig germ cells were isolated using an immunomagnetic cell isolation method and labeled with red- or green-fluorescent dye. In GDC culture, red-fluorescent-labeled germ cells were evenly distributed in the wells from day 1 to 4, and they clustered together at the time of GDC formation on day 6...
August 2016: Cellular Reprogramming
Franz Maximilian Rasche, Frieder Keller, Wilma Gertrud Rasche, Stephan Schiekofer, Andreas Boldt, Ulrich Sack, Jeanette Fahnert
IgA Nephropathy (IgAN) is the most common primary glomerulonephritis worldwide. Lifelong mesangial deposition of IgA1 complexes subsist inflammation and nephron loss but the complex pathogenesis in detail remains still unclear. In regard to the heterogeneous course, classical immunosuppressive and specific therapeutic regimes adapted to the loss of renal function will here discussed in addition to the essential common renal supportive therapy. Renal supportive therapy alleviates secondary, surrogate effects or sequelae on renal function and proteinuria of high intraglomerular pressure and subsequent nephrosclerosis by inhibition of the renin angiotensin system (RAASB)...
June 10, 2016: Clinical and Experimental Immunology
Aya Uchida, Kasane Kishi, Yoshimi Aiyama, Kento Miura, Hinako M Takase, Hitomi Suzuki, Masami Kanai-Azuma, Tokuko Iwamori, Masamichi Kurohmaru, Naoki Tsunekawa, Yoshiakira Kanai
In mouse testes, spermatogonial stem cells (SSCs), a subpopulation of GFRα1 (GDNF family receptor-α1)-positive spermatogonia, are widely distributed along the convoluted seminiferous tubules. The proliferation and differentiation of the SSCs are regulated in part by local expression of GDNF (glial cell-derived neurotorphic factor), one of major niche factors for SSCs. However, the in vivo dynamics of the GDNF-stimulated GFRα1-positive spermatogonia remains unclear. Here, we developed a simple method for transplanting DiI-labeled and GDNF-soaked beads into the mouse testicular interstitium...
August 5, 2016: Biochemical and Biophysical Research Communications
M Agopiantz, L Xandre-Rodriguez, B Jin, G Urbistondoy, C Ialy-Radio, M Chalbi, J-P Wolf, A Ziyyat, B Lefèvre
Recently, Juno, the oocyte receptor for Izumo1, a male immunoglobulin, was discovered. Juno is an essential glycosylphosphatidylinositol (GIP)-anchored protein. This result did not exclude the participation of other GIP-anchored proteins in this process. After bibliographic and database searches we selected five GIP-anchored proteins (Cpm, Ephrin-A4, Gas1, Gfra1 and Rgmb) as potential oocyte candidates participating in fertilisation. Western blot and immunofluorescence analyses showed that only three were present on the mouse ovulated oocyte membrane and, of these, only two were clearly involved in the fertilisation process, namely growth arrest specific 1 (Gas1) and glial cell line-derived neurotrophic factor receptor α1 (Gfrα1)...
February 24, 2016: Reproduction, Fertility, and Development
Alicja E Grzegorzewska, Grzegorz Ostromecki, Paulina Zielińska, Adrianna Mostowska, Zofia Niemir, Magdalena Polcyn-Adamczak, Magdalena Pawlik, Anna Sowińska, Paweł P Jagodziński
BACKGROUND Vitamin D (VD), VD binding protein, VD receptor (VDR), and retinoids are involved in pathogenesis of chronic glomerulonephritis (ChGN). We aimed to compare distribution of VD pathway gene polymorphisms in ChGN patients showing glomerular filtration rate (GFR) category 1-3, GFR category 5D, and healthy controls in order to elucidate the role of VD-related polymorphisms in the course of ChGN. MATERIAL AND METHODS GFR category 1-3 ChGN patients (n=195), GFR category 5D ChGN patients (n=178), and controls (n=751) underwent testing for polymorphisms of genes encoding VD binding protein (GC, rs2298849, rs7041, rs1155563), VDR (VDR, rs2228570, rs1544410), and retinoid X receptor alpha (RXRA, rs10776909, rs10881578, rs749759)...
November 27, 2015: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Jing-Bo Wang, Hai-Tao Wang, Lu-Ping Li, Ying-Chun Yan, Wei Wang, Jing-Yang Liu, Yi-Tong Zhao, Wei-Shu Gao, Ming-Xiang Zhang
AIM: To develop a practical and reproducible rat model of hepatorenal syndrome for further study of the pathophysiology of human hepatorenal syndrome. METHODS: Sprague-Dawley rats were intravenously injected with D-galactosamine and lipopolysaccharide (LPS) via the tail vein to induce fulminant hepatic failure to develop a model of hepatorenal syndrome. Liver and kidney function tests and plasma cytokine levels were measured after D-galactosamine/LPS administration, and hepatic and renal pathology was studied...
September 14, 2015: World Journal of Gastroenterology: WJG
Richard S Mangus, Andrew J Lutz, Jonathan A Fridell, Chandrashekhar A Kubal, Weston J Bush, A Joseph Tector
BACKGROUND: Renal function is an important predictor of liver transplantation (LT) outcome. This study examines the change in glomerular filtration rate (GFR, mL/min per m) in the first year after LT, with subgroup analysis by baseline GFR, model for end-stage liver disease (MELD), age, sex, race, and diabetes/hypertension. METHODS: The records of 1275 consecutive deceased donor, liver, and liver/kidney transplants were reviewed retrospectively, with the liver/kidney data analyzed separately...
September 2015: Transplantation
Faye B Vicente, Gina K Vespa, Fabiola Carrara, Flavio Gaspari, Shannon Haymond
OBJECTIVES: Measured glomerular filtration rate (mGFR) is the best indicator of renal function in children and adolescents. GFR determination using iohexol clearance has been increasingly accepted and applied in clinical practice because it is accurate, readily available, non-radioactive, safe and is used intravenously even in the presence of renal disease. This study describes the development and evaluation of a semi-automated method for determination of iohexol in human serum using liquid chromatography coupled with electrospray ionization (ESI) tandem mass spectrometry (LC-MS/MS)...
July 2015: Clinical Biochemistry
Tomás Zatko, Branislav Kolena, Ida Petrovicová, Tomás Pilka, Anton Kolacan
Our study aimed to establish the best prediction equation for different age ranges in estimating Glomerular Filtration Rate (GFR) in clinical practice in Slovakia. The GFR by 24-hour creatinine clearance (Ccr) and the estimated GFR (eGFR) using the Cockcroft-Gault (CG), the four-variable Modification of Diet in Renal Disease (MDRD4) and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations were obtained in adults aged 30-80 (n = 433, 10-years intervals). The correlation between these prediction equations and Ccr was evaluated...
March 2014: Central European Journal of Public Health
E L G Heaphy, E D Poggio, S M Flechner, D A Goldfarb, M Askar, R Fatica, T R Srinivas, J D Schold
As of November 2013, 14.5% of the waitlist for a donor kidney comprised patients awaiting a retransplant. We performed a retrospective cohort study of 11,698 adult solitary kidney recipients using national Scientific Registry of Transplant Recipients data transplanted between 2002 and 2011. The aim was to investigate whether outcomes from patients' initial transplants are significant risk factors for patients' repeat transplants or for likelihood of relisting after a failed primary transplant. Retransplant recipients were more likely to be treated for acute rejection [adjusted odds ratio (AOR), 95% confidence interval (CI) = 1...
June 2014: American Journal of Transplantation
Suetonia C Palmer, Sankar D Navaneethan, Jonathan C Craig, Vlado Perkovic, David W Johnson, Sagar U Nigwekar, Jorgen Hegbrant, Giovanni Fm Strippoli
BACKGROUND: People with chronic kidney disease (CKD) have higher risks of cardiovascular disease compared to the general population. Specifically, cardiovascular deaths account most deaths in kidney transplant recipients. Statins are a potentially beneficial intervention for kidney transplant patients given their established benefits in patients at risk of cardiovascular disease in the general population. This is an update of a review first published in 2009. OBJECTIVES: We aimed to evaluate the benefits (reductions in all-cause and cardiovascular mortality, major cardiovascular events, myocardial infarction and stroke, and progression of CKD to requiring dialysis) and harms (muscle or liver dysfunction, withdrawal, cancer) of statins compared to placebo, no treatment, standard care, or another statin in adults with CKD who have a functioning kidney transplant...
2014: Cochrane Database of Systematic Reviews
José Luis Cabrerizo-García, Jesús Díez-Manglano, Ernesto García-Arilla, Paz Revillo-Pinilla, José Ramón-Puertas, Mariano Sebastián-Royo
BACKGROUND AND OBJECTIVE: The Modification of Diet in Renal Disease (MDRD) equation is recommended by most scientific societies to calculate the estimated glomerular filtration rate (GFR). Recently the group Chronic Kidney Disease Epidemiology Collaboration (CKP-EPI) has published a new, more precise and accurate equation. We have analyzed its behavior in a group of polypathological patients (PP) and compared it with the classic MDRD-4.version PATIENTS AND METHOD: Multicenter, observational, descriptive and transversal study...
January 6, 2015: Medicina Clínica
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