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Glomerular endothelium

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https://www.readbyqxmd.com/read/28333979/the-interaction-between-fluid-status-and-angiopoietin-2-in-adverse-renal-outcomes-of-chronic-kidney-disease
#1
Yi-Chun Tsai, Yi-Wen Chiu, Hung-Tien Kuo, Jia-Jung Lee, Su-Chu Lee, Tzu-Hui Chen, Ming-Yen Lin, Shang-Jyh Hwang, Mei-Chuan Kuo, Ya-Ling Hsu, Hung-Chun Chen
BACKGROUND: Fluid overload is not only the characteristic but also an important complication in chronic kidney disease (CKD) patients. Angiopoietin-2 (Angpt2) disturbs endothelium and vessel permeability, which may induce fluid overload. The aim of this study is to examine the interaction between fluid status and Angpt2 in adverse renal outcomes of CKD. METHODS: This cohort study enrolled 290 patients with CKD stages 3-5 from January 2011 to December 2011 and followed up until December 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28320530/single-cell-rna-sequence-analysis-of-mouse-glomerular-mesangial-cells-uncovers-mesangial-cell-essential-genes
#2
Yuqiu Lu, Yuting Ye, Qianqian Yang, Shaolin Shi
Mesangial cells are essential for the structure and function of glomeruli, but the mechanisms underlying these roles are not well understood. Here, we performed a single-cell RNA-sequence (RNA-seq) analysis of mouse mesangial cells using the Fluidigm C1 platform. We found that gene expression in individual mesangial cells was tremendously heterogeneous, with mean correlation coefficients of 0.20, and most mesangial genes were actually expressed in only a portion of mesangial cells and are therefore presumably dispensable...
March 17, 2017: Kidney International
https://www.readbyqxmd.com/read/28294194/phosphodiesterase-5-inhibition-preserves-renal-hemodynamics-and-function-in-mice-with-diabetic-kidney-disease-by-modulating-mir-22-and-bmp7
#3
Riccardo Pofi, Daniela Fiore, Rita De Gaetano, Giuseppe Panio, Daniele Gianfrilli, Carlotta Pozza, Federica Barbagallo, Yang Kevin Xiang, Konstantinos Giannakakis, Susanna Morano, Andrea Lenzi, Fabio Naro, Andrea M Isidori, Mary Anna Venneri
Diabetic Nephropathy (DN) is the leading cause of end-stage renal disease. Preclinical and experimental studies show that PDE5 inhibitors (PDE5is) exert protective effects in DN improving perivascular inflammation. Using a mouse model of diabetic kidney injury we investigated the protective proprieties of PDE5is on renal hemodynamics and the molecular mechanisms involved. PDE5i treatment prevented the development of DN-related hypertension (P < 0.001), the increase of urine albumin creatinine ratio (P < 0...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181422/hmgb1-contributes-to-glomerular-endothelial-cell-injury-in-anca-associated-vasculitis-through-enhancing-endothelium-neutrophil-interactions
#4
Chen Wang, Dong-Yuan Chang, Min Chen, Ming-Hui Zhao
Our previous studies demonstrated that high mobility group box-1 (HMGB1), a typical damage-associated molecular pattern (DAMP) protein, is associated with the disease activity of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). Moreover, HMGB1 participates in ANCA-induced neutrophil activation. The current study aimed to investigate whether HMGB1 regulated the interaction between neutrophils and glomerular endothelial cells (GEnC) in the presence of ANCA. Correlation analysis on HMGB1 levels in AAV patients and soluble intercellular cell adhesion molecule-1 (sICAM-1) levels or vascular endothelial growth factor (VEGF) levels, which are markers of endothelial cell activation, was performed...
February 9, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28148530/usp40-gene-knockdown-disrupts-glomerular-permeability-in-zebrafish
#5
Hisashi Takagi, Yukino Nishibori, Kan Katayama, Tomohisa Katada, Shohei Takahashi, Zentaro Kiuchi, Shin-Ichiro Takahashi, Hiroyasu Kamei, Hayato Kawakami, Yoshihiro Akimoto, Akihiko Kudo, Katsuhiko Asanuma, Hiromu Takematsu, Kunimasa Yan
Unbiased transcriptome profiling and functional genomics approaches have identified ubiquitin specific protease 40 (USP40) as a highly specific glomerular transcript. This gene product remains uncharacterized, and its biological function is completely unknown. Here, we showed that mouse and rat glomeruli exhibit specific expression of the USP40 protein, which migrated at 150 kDa and was exclusively localized in the podocyte cytoplasm of the adult kidney. Double-labeling immunofluorescence staining and confocal microscopy analysis of fetal and neonate kidney samples revealed that USP40 was also expressed in the vasculature, including in glomerular endothelial cells at the premature stage...
February 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28054559/the-rhoa-rock-pathway-ameliorates-adhesion-and-inflammatory-infiltration-induced-by-ages-in-glomerular-endothelial-cells
#6
Jialing Rao, Zengchun Ye, Hua Tang, Cheng Wang, Hui Peng, Weiyan Lai, Yin Li, Wanbing Huang, Tanqi Lou
A recent study demonstrated that advanced glycation end products (AGEs) play a role in monocyte infiltration in mesangial areas in diabetic nephropathy. The Ras homolog gene family, member A Rho kinase (RhoA/ROCK) pathway plays a role in regulating cell migration. We hypothesized that the RhoA/ROCK pathway affects adhesion and inflammation in endothelial cells induced by AGEs. Rat glomerular endothelial cells (rGECs) were cultured with AGEs (80 μg/ml) in vitro. The ROCK inhibitor Y27632 (10 nmol/l) and ROCK1-siRNA were used to inhibit ROCK...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27784692/a-kidney-selective-biopolymer-for-targeted-drug-delivery
#7
Gene L Bidwell, Fakhri Mahdi, Qingmei Shao, Omar C Logue, Jamarius P Waller, Caleb Reese, Alejandro R Chade
Improving drug delivery to the kidney using renal-targeted therapeutics is a promising but underdeveloped area. We aimed to develop a kidney-targeting construct for renal-specific drug delivery. Elastin-like polypeptides (ELPs) are nonimmunogenic protein-based carriers that can stabilize attached small-molecule and peptide therapeutics. We modified ELP at its NH2-terminus with a cyclic, seven-amino acid kidney-targeting peptide (KTP) and at its COOH-terminus with a cysteine residue for tracer conjugation. Comparative in vivo pharmacokinetics and biodistribution in rat and swine models and in vitro cell binding studies using human renal cells were performed...
January 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27771030/endothelial-dysfunction-of-internal-thoracic-artery-graft-in-patients-with-chronic-kidney-disease
#8
Takeshi Kinoshita, Masashi Tawa, Tomoaki Suzuki, Yoshinari Aimi, Tohru Asai, Tomio Okamura
OBJECTIVES: The present study was designed to evaluate the association between chronic kidney disease and the endothelial function of internal thoracic artery (ITA) grafts in patients undergoing coronary bypass surgery. An isometric tension study was performed in ITA strips obtained during surgery. Concentration-response curves for acetylcholine (ACh) and sodium nitroprusside were constructed in ITA strips partially precontracted with phenylephrine under the inhibition of cyclooxygenase...
September 23, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27756187/endocan-and-albuminuria-in-type-2-diabetes-mellitus
#9
Mehmet Ali Cikrikcioglu, Zeynep Erturk, Elif Kilic, Kenan Celik, Iskender Ekinci, Ayse Irem Yasin Cetin, Tuba Ozkan, Guven Cetin, Shute Ailia Dae, Rumeyza Kazancioglu, Reha Erkoc
BACKGROUND: Endocan is a newly identified proteoglycan released from endothelium, stimulating angiogenesis and when increased, indicates endothelial activation (inflammation). Our aim was to examine the association between serum endocan levels and urine albumin-creatinine ratio (UACR). METHOD: One hundred and thirty-seven patients with type 2 diabetes mellitus and normal serum creatinine who had no co-morbidities other than hypertension, diabetic nephropathy, retinopathy, or neuropathy were divided into normoalbuminuria (G1), microalbuminuria (G2), and macroalbuminuria (G3) groups and compared cross-sectionally regarding serum endocan levels...
November 2016: Renal Failure
https://www.readbyqxmd.com/read/27754292/br-09-2-novel-approaches-to-the-renin-angiotensin-system-in-proteinuric-kideny-disease
#10
James Scholey
The classical view of the RAS is a linear signaling pathway beginning with the conversion of angiotensinogen to ANG I by renin, an enzyme secreted by the kidney. ANG I is converted to ANG II by angiotensin converting enzyme (ACE) ANG II binds to the G-protein coupled angiotensin II receptor type 1. The RAS is a circulating system but we now know that the RAS is also locally expressed in a number of tissues, including the kidneys and the heart. ANG II exerts adverse hemodynamic and non-hemodynamic effects on renal cells...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27701167/metabolic-and-hormonal-determinants-of-glomerular-filtration-rate-and-renal-hemodynamics-in-severely-obese-individuals
#11
Edoardo Vitolo, Eleonora Santini, Antonio Salvati, Duccio Volterrani, Valerio Duce, Rosa Maria Bruno, Anna Solini
OBJECTIVE: Renal function is often compromised in severe obesity. A true measurement of glomerular filtration rate (GFR) is unusual, and how estimation formulae (EstForm) perform in such individuals is unclear. We characterized renal function and hemodynamics in severely obese individuals, assessing the reliability of EstForm. METHODS: We measured GFR (mGFR) by iohexol plasma clearance, renal plasma flow (RPF) by 123I-ortho-iodo-hippurate, basal and stimulated vascular renal indices, endothelium-dependent and -independent vasodilation using flow-mediated dilation (FMD) as well as metabolic and hormonal profile in morbid, otherwise healthy, obese subjects...
October 5, 2016: Obesity Facts
https://www.readbyqxmd.com/read/27643290/br-09-2-novel-approaches-to-the-renin-angiotensin-system-in-proteinuric-kideny-disease
#12
James Scholey
The classical view of the RAS is a linear signaling pathway beginning with the conversion of angiotensinogen to ANG I by renin, an enzyme secreted by the kidney. ANG I is converted to ANG II by angiotensin converting enzyme (ACE) ANG II binds to the G-protein coupled angiotensin II receptor type 1. The RAS is a circulating system but we now know that the RAS is also locally expressed in a number of tissues, including the kidneys and the heart. ANG II exerts adverse hemodynamic and non-hemodynamic effects on renal cells...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27582103/both-clic4-and-clic5a-activate-erm-proteins-in-glomerular-endothelium
#13
Mahtab Tavasoli, Abass Al-Momany, Xin Wang, Laiji Li, John C Edwards, Barbara J Ballermann
The chloride intracellular channel (CLIC) 5A is expressed at very high levels in renal glomeruli, in both endothelial cells (EC) and podocytes. CLIC5A stimulates Rac1- and phosphatidylinositol (4,5)-bisphosphate-dependent ERM (ezrin, radixin, moesin) activation. ERM proteins, in turn, function in lumen formation and in the development of actin-based cellular projections. In mice lacking CLIC5A, ERM phosphorylation is profoundly reduced in podocytes, but preserved in glomerular EC. Since glomerular EC also express CLIC4, we reasoned that, if CLIC4 activates ERM proteins like CLIC5A, then CLIC4 could compensate for the CLIC5A loss in glomerular EC...
November 1, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27496491/endocan-concentration-and-chronic-inflammatory-process-among-heart-transplant-recipients
#14
P Przybylowski, G Wasilewski, E Koc-Żórawska, J Malyszko
BACKGROUND: Endocan is a novel soluble dermatan sulfate proteoglycan derived from endothelium. It has the capacity of binding to different biologically active molecules associated with cellular signaling, adhesion, and regulating proliferation, differentiation, migration, and adhesion of different cell types in health and pathology. Its elevated level is connected with endothelial activation, neovascularization, and inflammation or carcinogenesis. METHODS: The level of serum endocan among 131 heart transplant recipients on 3-drug immunosuppression (calcineurin inhibitor, mycophenolate mofetil/mycophenolic acid, steroid) in correlation with other markers of endothelial damage was determined...
June 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27477767/the-endoderm-indirectly-influences-morphogenetic-movements-of-the-zebrafish-head-kidney-through-the-posterior-cardinal-vein-and-vegfc
#15
Chih-Wei Chou, Hsiao-Chu Hsu, May-Su You, Jamie Lin, Yi-Wen Liu
Integration of blood vessels and organ primordia determines organ shape and function. The head kidney in the zebrafish interacts with the dorsal aorta (DA) and the posterior cardinal vein (PCV) to achieve glomerular filtration and definitive hematopoiesis, respectively. How the head kidney co-develops with both the axial artery and vein remains unclear. We found that in endodermless sox32-deficient embryos, the head kidney associated with the PCV but not the DA. Disrupted convergent migration of the PCV and the head kidney in sox32-deficient embryos was rescued in a highly coordinated fashion through the restoration of endodermal cells...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27465797/activation-of-general-control-nonderepressible-2-kinase-protects-human-glomerular-endothelial-cells-from-harmful-high-glucose-induced-molecular-pathways
#16
Theodoros Eleftheriadis, Konstantina Tsogka, Georgios Pissas, Georgia Antoniadi, Vassilios Liakopoulos, Ioannis Stefanidis
PURPOSE: Considering the referred beneficial effects of protein restriction on diabetic nephropathy (DN) and the role of renal endothelium in its pathogenesis, we evaluated the effect of general control nonderepressible 2 (GCN2) kinase activation, a sensor of amino acid deprivation, on known detrimental molecular pathways in primary human glomerular endothelial cells (GEnC). METHODS: GEnC were cultured under normal or high-glucose conditions in the presence or not of the GCN2 kinase activator, tryptophanol...
October 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27460033/c3-mesangial-proliferative-glomerulonephritis-initially-presenting-with-atypical-hemolytic-uremic-syndrome-a-case-report
#17
Can Huzmeli, Ferhan Candan, Ayse Seker, Esin Yildiz, Hatice Terzi, Mansur Kayatas
BACKGROUND: Hemolytic uremic syndrome is characterized by acute renal failure, thrombocytopenia, and Coombs-negative hemolytic anemia. In C3 mesangial proliferative glomerulonephritis, an increase in mesangial cell proliferation without thickening in the glomerular capillary wall can be seen under light microscopy, but the definitive diagnosis is made with the immunohistologic demonstration of isolated C3 deposits in the mesangium. C3 glomerulonephritis may be detected in childhood; however, in this case report we describe the first case of isolated C3 glomerulonephritis together with atypical hemolytic uremic syndrome in an adult patient...
July 27, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27424703/fanconi-syndrome-due-to-light-chain-proximal-tubulopathy-in-a-patient-with-multiple-myeloma
#18
Mohit Mathur, Bobby Chacko, Mahesha Vankalakunti, Channappa Patil
Fanconi syndrome (FS) in an adult patient is an unusual finding and it merits thorough evaluation. Paraproteinemias are one of the common etiologies in adult FS and need to be ruled out. Among the various forms of renal involvement in multiple myeloma, light chain proximal tubulopathy (LCPT) is the rarest. Usually, it causes proximal tubular dysfunction which is characterized by intracytoplasmic deposition of crystallized, mostly kappa monoclonal light chains in proximal tubules; however, glomerular crystal deposition is unusual...
July 2016: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/27362315/human-cytomegalovirus-encoded-receptor-us28-is-expressed-in-renal-allografts-and-facilitates-viral-spreading-in-vitro
#19
Wouter T Lollinga, Raymond H de Wit, Afsar Rahbar, Gwenda F Vasse, Belghis Davoudi, Arjan Diepstra, Annelies Riezebos-Brilman, Martin C Harmsen, Jan-Luuk Hillebrands, Cecilia Söderberg-Naucler, Willem J van Son, Martine J Smit, Jan-Stephan Sanders, Jacob van den Born
BACKGROUND: Renal transplantation is the preferred treatment for patients with end-stage renal disease. Human cytomegalovirus (HCMV) activation is associated with decreased renal graft function and survival. Human cytomegalovirus encodes several immune modulatory proteins, including the G protein-coupled receptor US28, which scavenges human chemokines and modulates intracellular signaling. METHODS: Our aim was to identify the expression and localization of US28 in renal allograft biopsies by immunohistochemistry and determine its role in viral spreading in vitro...
March 2017: Transplantation
https://www.readbyqxmd.com/read/27315281/nf-%C3%AE%C2%BAb-signaling-maintains-the-survival-of-cadmium-exposed-human-renal-glomerular-endothelial-cells
#20
Hongyan Zhang, Liqun Li, Yifan Wang, Fengyun Dong, Xiaocui Chen, Fuhong Liu, Dongmei Xu, Fan Yi, Carolyn M Kapron, Ju Liu
The kidney is one of the primary organs targeted by cadmium (Cd), a widely distributed environmental pollutant. The glomerular endothelium is the major component of the glomerular filtration barrier. However, the effects of Cd on glomerular endothelial cells remain largely unknown. For this purpose, we aimed to determine the effects of low dose Cd on the survival of human renal glomerular endothelial cells (HRGECs). Cultured HRGECs were exposed to 4 µM cadmium chloride (CdCl2) and examined at different time-points...
August 2016: International Journal of Molecular Medicine
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