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https://www.readbyqxmd.com/read/28933341/c4d-expressing-glomerulopathy-and-proteinuria-post-transplantation-of-a-%C3%A2-too-big-for-size-mismatched-kidney-allograft-an-unusual-case-with-good-outcome%C3%A2
#1
Francois Gougeon, Alexei V Mikhailov, Keisha Gibson, Tomasz Kozlowski, Harsharan K Singh, Volker Nickeleit
A 5-year-old severely growth-retarded child with tubulointerstitial, oliguric end-stage renal disease received an adult-size kidney transplant. Three years post grafting under standard triple immunosuppression (mycophenolate mofetil, tacrolimus, and prednisone) de novo nephrotic range proteinuria without the nephrotic syndrome developed. Graft function was normal (serum creatinine: 0.2 - 0.3 mg/dL), there were no donor-specific HLA antibodies (DSA), and the urine sediment was inactive. Two biopsies collected 3 and 4 years post-transplantation showed severe glomerular capillary wall remodeling and associated pseudolinear C4d staining as morphologic correlates for the proteinuria...
September 21, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28921709/kidney-allograft-failure-in-the-steroid-free-immunosuppression-era-a-matched-case-control-study
#2
Mohamad M Alkadi, Jim Kim, Meredith J Aull, Joseph E Schwartz, John R Lee, Anthony Watkins, Jun B Lee, Darshana M Dadhania, Surya V Seshan, David Serur, Sandip Kapur, Manikkam Suthanthiran, Choli Hartono, Thangamani Muthukumar
We studied the causes and predictors of death-censored kidney allograft failure among 1670 kidney recipients transplanted at our center in the corticosteroid-free maintenance immunosuppression era. As of January 1, 2012, we identified 137 recipients with allograft failure; 130 of them (cases) were matched 1-1 for recipient age, calendar year of transplant and donor type with 130 recipients with functioning grafts (controls). Median time to allograft failure was 29 months (interquartile range 18-51). Physician validated and biopsy confirmed categories of allograft failure were: acute rejection (21%), glomerular disease (19%), transplant glomerulopathy (13%), interstitial fibrosis tubular atrophy (10%), and polyomavirus-associated nephropathy (7%)...
September 18, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28919801/transforming-growth-factor-%C3%AE-1-smad3-independent-epithelial-mesenchymal-transition-in-type-i-collagen-glomerulopathy
#3
Amanda C Brodeur, Anna M Roberts-Pilgrim, Kimberlee L Thompson, Craig L Franklin, Charlotte L Phillips
The glomerulofibrotic Col1a2-deficient mouse model demonstrates glomerular homotrimeric type I collagen deposition in mesangial and subendothelial spaces. In this report, we investigate the role of transforming growth factor β1 (TGF-β1) in myofibroblast activation and epithelial-mesenchymal transition (EMT) in this glomerulopathy. Immunohistochemical analyses of glomerular α-sma, desmin, vimentin, and proliferating cell nuclear antigen demonstrated parietal epithelial cell proliferation and EMT in late stages of the glomerulopathy in the Col1a2-deficient mice...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28916834/ultrastructural-characterization-of-the-glomerulopathy-in-alport-mice-by-helium-ion-scanning-microscopy-him
#4
Kenji Tsuji, Hani Suleiman, Jeffrey H Miner, James M Daley, Diane E Capen, Teodor G Păunescu, Hua A Jenny Lu
The glomerulus exercises its filtration barrier function by establishing a complex filtration apparatus consisting of podocyte foot processes, glomerular basement membrane and endothelial cells. Disruption of any component of the glomerular filtration barrier leads to glomerular dysfunction, frequently manifested as proteinuria. Ultrastructural studies of the glomerulus by transmission electron microscopy (TEM) and conventional scanning electron microscopy (SEM) have been routinely used to identify and classify various glomerular diseases...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911876/immunoglobulin-isotype-switching-of-antibodies-to-vimentin-is-associated-with-development-of-transplant-glomerulopathy-following-human-renal-transplantation
#5
Muthukumar Gunasekaran, Thin Thin Maw, Rowena Delos Santos, Surendra Shenoy, Jason Wellen, T Mohanakumar
BACKGROUND: Immune responses to tissue-restricted self-antigens are thought to play a role in chronic rejection after solid organ transplantation. De novo development of antibodies (Abs) to vimentin have been reported to be associated with interstitial fibrosis/tubular atrophy after kidney transplant, and it has been suggested that immunoglobulin isotype switching of Abs to vimentin may occur during this process. We aimed to determine the correlation between immunoglobulin isotype switching of Abs to vimentin and development of transplant glomerulopathy (TG) after kidney transplant, and to determine whether citrullinated modification of vimentin is required for de novo anti-vimentin development...
September 11, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28904428/collapsing-glomerulopathy-a-troublemaker-for-the-renal-allograft-lessons-learnt
#6
K V Kanodia, A V Vanikar, L K Nigam, R D Patel, K S Suthar, H V Patel, H L Trivedi
Collapsing glomerulopathy (CG) is a well-recognized distinct morphological pattern of proliferative parenchymal injury leading to rapid graft failure. We conducted a single-center retrospective study to evaluate the prevalence, clinicopathological features, and prognosis of CG in renal transplant recepient. We analyzed 2518 renal allograft biopsies performed from 2007 to 2015 and correlated their clinicopathological features. The prevalence of CG was 0.83% (21 out of 2518) of allograft biopsies with a higher prevalence of 1...
September 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28883987/obesity-and-kidney-disease-hidden-consequences-of-the-epidemic
#7
REVIEW
Csaba P Kovesdy, Susan L Furth, Carmine Zoccali
Obesity has become a worldwide epidemic, and its prevalence has been projected to grow by 40% in the next decade. This increasing prevalence has implications for the risk of diabetes, cardiovascular disease and also for chronic kidney disease. A high BMI is one of the strongest risk factors for new-onset chronic kidney disease. In individuals affected by obesity, a compensatory hyperfiltration occurs to meet the heightened metabolic demands of the increased body weight. The increase in intraglomerular pressure can damage the kidneys and raise the risk of developing chronic kidney disease in the long-term...
August 2017: Future Science OA
https://www.readbyqxmd.com/read/28881045/diagnostic-accuracy-of-immunofluorescence-versus-immunoperoxidase-staining-to-distinguish-immune-complex-mediated-glomerulonephritis-and-c3-dominant-glomerulopathy
#8
Yassine Bouatou, Jesper Kers, Marie S N Chevalier-Florquin, Nike Claessen, Tri Q Nguyen, Jeffrey Damman, Henrique Proença, Joris J T H Roelofs, Sandrine Florquin
AIMS: Membranoproliferative glomerulonephritis (MPGN) has been reclassified from an electron microscopy to an immunofluorescence (IF) based semi quantitative classification with immunoperoxidase (IP) technique as a backup option when IF is not possible. However, no data are available on the interobserver variability, the correlation and the reclassification of MPGN based on these two techniques. METHODS & RESULTS: We retrospectively analyzed cases of type 1 MPGN...
September 7, 2017: Histopathology
https://www.readbyqxmd.com/read/28877681/fibronectin-glomerulopathy-complicated-with-persistent-cloaca-and-congenital-esophageal-atresia-a-case-report-and-literature-review
#9
Misaki Takii, Takaichi Suehiro, Aya Shima, Hideki Yotsueda, Satoshi Hisano, Ritsuko Katafuchi
BACKGROUND: Fibronectin glomerulopathy is a rare, inherited, autosomal dominant, glomerular disease characterized by proteinuria, microscopic hematuria, hypertension, massive glomerular deposits of fibronectin, and slow progression to end-stage renal failure. Because the incident of fibronectin glomerulopathy is extremely low, the pathophysiology, genetic abnormalities, epidemiology, and mechanisms remain to be elucidated. CASE PRESENTATION: We report a 21-year-old woman with fibronectin glomerulopathy, who had been diagnosed with persistent cloaca and congenital esophageal atresia at birth...
September 6, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28875965/fibronectin-glomerulopathy-a-rare-autosomal-dominant-glomerular-disease
#10
Jing Wu, Yan Zhou, Xiao Huang, Li Huang, Zheng Tang
No abstract text is available yet for this article.
September 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28873129/association-of-serum-soluble-urokinase-receptor-levels-with-progression-of-kidney-disease-in-children
#11
Franz Schaefer, Howard Trachtman, Elke Wühl, Marietta Kirchner, Salim S Hayek, Ali Anarat, Ali Duzova, Sevgi Mir, Dusan Paripovic, Alev Yilmaz, Francesca Lugani, Klaus Arbeiter, Mieczyslaw Litwin, Jun Oh, Maria Chiara Matteucci, Jutta Gellermann, Simone Wygoda, Augustina Jankauskiene, Günter Klaus, Jiri Dusek, Sara Testa, Aleksandra Zurowska, Alberto Caldas Afonso, Melissa Tracy, Changli Wei, Sanja Sever, William Smoyer, Jochen Reiser
Importance: Conventional methods to diagnose and monitor chronic kidney disease (CKD) in children, such as creatinine level and cystatin C-derived estimated glomerular filtration rate (eGFR) and assessment of proteinuria in spot or timed urine samples, are of limited value in identifying patients at risk of progressive kidney function loss. Serum soluble urokinase receptor (suPAR) levels strongly predict incident CKD stage 3 in adults. Objective: To determine whether elevated suPAR levels are associated with renal disease progression in children with CKD...
September 5, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28868299/tubuloreticular-inclusions-in-the-absence-of-systemic-lupus-erythematosus-and-hiv-infection-a-report-of-three-pediatric-cases
#12
Ayah Elmaghrabi, Elizabeth Brown, Ei Khin, Jared Hassler, Allen R Hendricks
Tubuloreticular inclusions (TRIs) are subcellular structures located within the cisternae of endoplasmic reticulum. Formation of TRIs has been linked to the exposure of excess interferon (IFN), either from endogenous or exogenous sources. In renal disease, TRIs have been most commonly associated with systemic lupus erythematosus (SLE), and human immunodeficiency virus-associated nephropathy (HIVAN). Case reports of patients with renal biopsies showing TRIs without underlying SLE or HIV are infrequent in adults, and to our knowledge none have been reported in children...
May 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28868298/case-report-of-spontaneous-remission-of-biopsy-proven-idiopathic-immune-complex-mediated-membranoproliferative-glomerulonephritis
#13
Rehan Shah, Mark S Segal, Michael J Wilkowski
Membranoproliferative glomerulonephritis (MPGN) is a histopathologic diagnosis causing microscopic hematuria, nephrotic range proteinuria, and chronic renal failure. Current understanding divides pathogenesis into two broad categories: immune complex mediated and complement mediated (now termed C3 glomerulopathy). The term idiopathic immune complex-mediated MPGN would apply to a patient without an identifiable source of immune complex production and no evidence of C3 glomerulopathy. Presented is a patient with idiopathic immune complex mediated MPGN and her clinical course...
May 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28865030/drebrin-in-renal-glomeruli
#14
Wiebke K Ludwig-Peitsch
The central function of renal glomeruli is plasma ultrafiltration for primary urine production. The glomerular filtration barrier consists of a fenestrated endothelium, the glomerular basement membrane and podocytes, mesenchymal-like cells with actin filament-rich protrusions, the "foot processes." Their architecture and function are maintained and regulated by actin and several actin-binding proteins, mutations of which can be causative of glomerular diseases. Since initial immunostaining experiments had demonstrated intense drebrin reactions in renal glomeruli, the distribution of this protein was studied in detail in the kidneys of diverse mammalian species...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28864093/biopsy-proven-renal-involvement-and-prognosis-in-13-hispanic-patients-with-primary-sj%C3%A3-gren-syndrome
#15
Diego Luis Carrillo-Pérez, Javier Tejeda-Maldonado, Carlos Garza-García, Virgilia Soto-Abraham, Gabriela Hernández-Molina, Giovanni Arnoldo Molina-Paredes, Norma O Uribe-Uribe, Luis E Morales-Buenrostro
BACKGROUND: The aim of this study was to describe a case series of 13 Hispanic patients with primary Sjögren syndrome (pSS) and biopsy-proven renal involvement. METHODS: We describe the clinical, serological and histological characteristics as well as the prognosis in a group of patients with pSS and biopsy-proven renal involvement, treated in 2 referral nephrology units in Mexico City. RESULTS: Thirteen patients with pSS underwent kidney biopsy (KB) over a period of 27 years...
August 29, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28852482/infectious-complications-of-a-rituximab-based-immunosuppressive-regimen-in-patients-with-glomerular-disease
#16
Claire Trivin, Antoine Tran, Bruno Moulin, Gabriel Choukroun, Philippe Gatault, Cécile Courivaud, Jean-François Augusto, Maxence Ficheux, Cécile Vigneau, Eric Thervet, Alexandre Karras
BACKGROUND: Recent years have seen increasing use of rituximab (RTX) for various types of primary and secondary glomerulopathies. However, there are no studies that specifically address the risk of infection related to this agent in patients with these conditions. METHODS: We reviewed the outcomes of all patients who received RTX therapy for glomerular disease between June 2000 and October 2011 in eight French nephrology departments. Each case was analysed for survival, cause of death if a non-survivor and/or the presence of infectious complications, including severe or opportunistic infection occurring within the 12 months following RTX infusion...
August 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28852479/collapsing-glomerulopathy-a-30-year-perspective-and-single-large-center-experience
#17
L Nicholas Cossey, Christopher P Larsen, Helen Liapis
Collapsing glomerulopathy (CGP) is a pattern of kidney injury seen on renal biopsy with multiple associations and etiologies. It is most commonly described in African-Americans and others with recent African ancestry. The disease is rapidly progressive and often presents with abrupt onset of renal failure and nephrotic-range proteinuria. Since its description 30 years ago, this entity has transformed from a morphologic diagnosis typically seen in the setting of HIV infection to a complicated diagnosis with numerous etiologies, many of which are associated with underlying apolipoprotein L1 (APOL1)-risk variants or other genetic disorders...
August 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28842605/deficient-insulin-mediated-upregulation-of-the-equilibrative-nucleoside-transporter-2-contributes-to-chronically-increased-adenosine-in-diabetic-glomerulopathy
#18
Sebastián Alarcón, Wallys Garrido, Claudio Cappelli, Raibel Suárez, Carlos Oyarzún, Claudia Quezada, Rody San Martín
Deficient insulin signaling is a key event mediating diabetic glomerulopathy. Additionally, diabetic kidney disease has been related to increased levels of adenosine. Therefore, we tested a link between insulin deficiency and dysregulated activity of the equilibrative nucleoside transporters (ENTs) responsible for controlling extracellular levels of adenosine. In ex vivo glomeruli, high D-glucose decreased nucleoside uptake mediated by ENT1 and ENT2 transporters, resulting in augmented extracellular levels of adenosine...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28838767/c4-nephritic-factors-in-c3-glomerulopathy-a-case-series
#19
Yuzhou Zhang, Nicole C Meyer, Fernando C Fervenza, Winnie Lau, Adam Keenan, Gabriel Cara-Fuentes, Dingwu Shao, Aalia Akber, Veronique Fremeaux-Bacchi, Sanjeev Sethi, Carla M Nester, Richard J H Smith
BACKGROUND: C3 glomerulopathy (C3G) defines a group of rare complement-mediated kidney diseases with a shared underlying pathophysiology: dysregulation of complement in the fluid phase and glomerular microenvironment. Dysregulation can be driven by autoantibodies to C3 and C5 convertases. STUDY DESIGN: Case series. SETTING & PARTICIPANTS: 168 patients with C3G (dense deposit disease, 68; C3 glumerulonephritis, 100) selected from our C3G biobank...
August 22, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28833936/persistent-c4d-and-antibody-mediated-rejection-in-pediatric-renal-transplant-patients
#20
Andrew M South, Lynn Maestretti, Neeraja Kambham, Paul C Grimm, Abanti Chaudhuri
Pediatric renal transplant recipient survival continues to improve, but ABMR remains a significant contributor to graft loss. ABMR prognostic factors to guide treatment are lacking. C4d staining on biopsies, diagnostic of ABMR, is associated with graft failure. Persistent C4d+ on follow-up biopsies has unknown significance, but could be associated with worse outcomes. We evaluated a retrospective cohort of 17 pediatric renal transplant patients diagnosed with ABMR. Primary outcome at 12 months was a composite of ≥50% reduction in eGFR, transplant glomerulopathy, or graft failure...
August 22, 2017: Pediatric Transplantation
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