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https://www.readbyqxmd.com/read/29160413/long-non-coding-rna-chchd4p4-promotes-epithelial-mesenchymal-transition-and-inhibits-cell-proliferation-in-calcium-oxalate-induced-kidney-damage
#1
C Zhang, J Yuan, H Hu, W Chen, M Liu, J Zhang, S Sun, Z Guo
Kidney stone disease is a major cause of chronic renal insufficiency. The role of long non-coding RNAs (lncRNAs) in calcium oxalate-induced kidney damage is unclear. Therefore, we aimed to explore the roles of lncRNAs in glyoxylate-exposed and healthy mouse kidneys using microarray technology and bioinformatics analyses. A total 376 mouse lncRNAs were differentially expressed between the two groups. Using BLAST, 15 lncRNA homologs, including AU015836 and CHCHD4P4, were identified in mice and humans. The AU015836 expression in mice exposed to glyoxylate and the CHCHD4P4 expression in human proximal tubular epithelial (HK-2) cells exposed to calcium oxalate monohydrate were analyzed, and both lncRNAs were found to be upregulated in response to calcium oxalate...
November 13, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29158549/hypoxia-inducible-factor-1%C3%AE-mediates-the-profibrotic-effect-of-albumin-in-renal-tubular-cells
#2
Junping Hu, Weili Wang, Fan Zhang, Pin-Lan Li, Krishna M Boini, Fan Yi, Ningjun Li
Proteinuria is closely associated with the progression of chronic kidney diseases (CKD) by producing renal tubulointerstitial fibrosis. Over-activation of hypoxia inducible factor (HIF)-1α has been implicated in the progression of CKD. The present study tested the hypothesis that HIF-1α mediates albumin-induced profibrotic effect in cultured renal proximal tubular cells. Incubation of the cells with albumin (40 μg/ml) for 72 hrs significantly increased the protein levels of HIF-1α, tissue inhibitor of metalloproteinase (TIMP)-1 and collagen-I, which were blocked by HIF-1α shRNA...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137244/microrna-423-5p-facilitates-hypoxia-reoxygenation-induced-apoptosis-in-renal-proximal-tubular-epithelial-cells-by-targeting-gstm1-via-endoplasmic-reticulum-stress
#3
Xiao-Peng Yuan, Long-Shan Liu, Chuan-Bao Chen, Jian Zhou, Yi-Tao Zheng, Xiao-Ping Wang, Ming Han, Chang-Xi Wang
It has been reported that microRNAs (miRs) can regulate renal response to acute injury and members of them are believed to be important in maintenance of renal function and development of renal injury. We investigated the actions of microRNA-423-5p (miR-423-5p) and glutathione-S-transferase (GST) M1 after acute kidney injury. MiR-423-5p was up-regulated and GSTM1 was down-regulated in human kidney (HK-2) cells subjected to hypoxia/reoxygenation (H/R) and in rat kidneys subjected to ischemia/reperfusion (I/R) injury...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133360/selective-nanoparticle-targeting-of-the-renal-tubules
#4
Ryan M Williams, Janki Shah, Helen S Tian, Xi Chen, Frederic Geissmann, Edgar A Jaimes, Daniel A Heller
Direct targeting to the kidneys is a promising strategy to improve drug therapeutic index for the treatment of kidney diseases. We sought to investigate the renal selectivity and safety of kidney-targeted mesoscale nanoparticle technology. We found that direct intravenous administration of these particles resulted in 26-fold renal selectivity and localized negligibly in the liver or other organs. The nanoparticles targeted the renal proximal tubular epithelial cells, as evidenced by intravital microscopy and ex vivo imaging...
November 13, 2017: Hypertension
https://www.readbyqxmd.com/read/29131056/chloride-intracellular-channel-4-overexpression-in-the-proximal-tubules-of-kidneys-from-the-spontaneously-hypertensive-rat-insight-from-proteomic-analysis
#5
Diane Hatziioanou, Georgios Barkas, Elena Critselis, Jerome Zoidakis, Hariklia Gakiopoulou, Maria-Eleni Androutsou, Garyfalia Drossopoulou, Aristidis Charonis, Demetrios V Vlahakos
BACKGROUND: Hypertensive nephropathy, a leading cause of declining kidney function, is a multifactorial process not well understood. In order to elucidate biological processes and identify novel macromolecular components crucially involved in the process of kidney damage, the application of system biology approaches, like proteomics, is required. METHODS: Proteomic studies were performed using the renal parenchyma of spontaneously hypertensive rats (SHR) and their normotensive Wistar Kyoto controls...
November 7, 2017: Nephron
https://www.readbyqxmd.com/read/29125601/tm9sf4-is-a-novel-factor-promoting-autophagic-flux-under-amino-acid-starvation
#6
Lei Sun, Zhaoyue Meng, Yifei Zhu, Jun Lu, Zhichao Li, Qiannan Zhao, Yu Huang, Liwen Jiang, Xiaoqiang Yao
Autophagy is a highly complicated process with participation of large numbers of autophagy-related proteins. Under nutrient starvation, autophagy promotes cell survival by breaking down nonessential cellular components for recycling use. However, due to its high complexity, molecular mechanism of autophagy is still not fully understood. In the present study, we report a novel autophagy-related protein TM9SF4, which plays a functional role in the induction phase of autophagic process. TM9SF4 proteins were abundantly expressed in the kidney, especially in renal proximal tubular epithelial cells...
November 10, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29124787/reduced-tubular-degradation-of-glomerular-filtered-plasma-albumin-is-a-common-feature-in-acute-and-chronic-kidney-disease
#7
Yingjie Han, Nguyen D K Ly, Greg H Tesch, Philip Poronnik, David J Nikolic-Paterson
Tubular epithelial cells take up and degrade plasma albumin filtered by the glomerulus. Tubular damage resulting in reduced albumin uptake or degradation has been suggested as one mechanism contributing to albuminuria in kidney disease. This study investigated whether albumin uptake or degradation is altered in acute and chronic glomerular disease. Mouse models of acute glomerular injury (anti-GBM disease and LPS-induced albuminuria) and chronic disease (streptozotocin-induced diabetes and db/db mice) were examined...
November 10, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29118904/inhibiting-post-translational-core-fucosylation-protects-against-albumin-induced-proximal-tubular-epithelial-cell-injury
#8
Dapeng Wang, Ming Fang, Nan Shen, Longkai Li, Weidong Wang, Lingyu Wang, Hongli Lin
Albuminuria is an independent risk factor for renal interstitial fibrosis (RIF). Glomerular-filtered albumin in endocytic and non-endocytic pathways may injure proximal tubular epithelial cells (PTECs) via megalin and TGFβRII, respectively. Since megalin and TGFβRII are both modified by post-translational core fucosylation, which plays a critical role in RIF. Thus, we sought to identify whether core fucosylation is a potential target for reducing albumin-induced injury to PTECs. We constructed a human PTEC-derived cell line (HK-2 cells) and established an in vitro model of bovine serum albumin (BSA) injury...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29115480/protective-effects-of-probucol-on-ox-ldl-induced-epithelial-mesenchymal-transition-in-human-renal-proximal-tubular-epithelial-cells-via-lox%C3%A2-1-ros-mapk-signaling
#9
Bing Bing Zhu, Hao Wang, Yang Feng Chi, Yun Man Wang, Xing Mei Yao, Shuang Liu, Huiling Qiu, Ji Fang, Pei Hao Yin, Xue Mei Zhang, Wen Peng
Oxidized low-density lipoprotein (Ox-LDL), as a strong oxidant, results in renal injury through multiple mechanisms. The aim of the present study was to determine the injury effects of Ox‑LDL and the potential protective effects of the antioxidant reagent probucol on epithelial‑mesenchymal transition (EMT) in human renal proximal tubular epithelial cells (HK‑2) and to further explore the role and interrelation of lectin‑like oxidized low‑density lipoprotein receptor‑1 (LOX‑1), reactive oxygen species (ROS) and mitogen‑activated protein kinase (MAPK) pathway...
November 2, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115386/protein-extracted-from-porphyra-yezoensis-prevents-cisplatin-induced-nephrotoxicity-by-downregulating-the-mapk-and-nf-%C3%AE%C2%BAb-pathways
#10
In-Hye Kim, Mi-Jin Kwon, Jae-Hun Jung, Taek-Jeong Nam
Acute renal failure is a serious complication of treatment with the anticancer drug cisplatin. Cisplatin exerts a cytotoxic effect on renal cells by inducing apoptosis through activating the tumor suppressor p53, nuclear factor‑κB (NF‑κB) and mitogen‑activated protein kinase (MAPK)/p38 pathways. Effects of protein extracts of the brown seaweed Porphyra yezoensis (P. yezoensis) on cytotoxicity, inflammation and cell proliferation have been reported; however, the effects of P. yezoensis protein (PYP) extract on cisplatin‑induced renal injury have remained elusive...
October 26, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29109726/il-36%C3%AE-regulates-tubulointerstitial-inflammation-in-the-mouse-kidney
#11
Osamu Ichii, Junpei Kimura, Tadashi Okamura, Taro Horino, Teppei Nakamura, Hayato Sasaki, Yaser Hosny Ali Elewa, Yasuhiro Kon
IL-36α, a member of the IL-1 family, is a crucial mediator of inflammatory responses. We previously found that IL-36α was overexpressed in injured distal tubules (DTs); however, its pathological function remains unclear. Herein, unilateral ureter obstruction (UUO) or folic acid (FA) injection was performed in mouse kidneys to assess the role of IL-36α in kidney injury. IL-36α mRNA and protein expression significantly increased in the kidneys within 24 h after UUO. IL-36α localized to dilated DTs. IL-36α expression significantly correlated with the progression of tubulointerstitial cell infiltration and tubular epithelium cell death in UUO kidneys and with renal dysfunction in FA-induced acute kidney injury mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29107072/ectopic-phosphorylated-creb-marks-dedifferentiated-proximal-tubules-in-cystic-kidney-disease
#12
Pawan Puri, Caitlin M Schaefer, Daniel Bushnell, Mary E Taglienti, Jordan A Kreidberg, Bradley K Yoder, Carlton M Bates
Ectopic cAMP signaling is pathological in polycystic kidney disease; however, its spatio-temporal actions are unclear. We characterized expression of phosphorylated Creb (p-Creb), a target and mediator of cAMP signaling, in developing and cystic kidney models. We also examined tubule-specific effects of cAMP analogs in cystogenesis in embryonic kidney explants. In wild-type mice, p-Creb marked nephron progenitors (NP), early epithelial NP derivatives, ureteric bud, and cortical stroma; p-Creb was present in differentiated thick ascending limb of Henle, collecting duct, and stroma; however, it disappeared in mature NP-derived proximal tubules...
October 26, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29067462/the-transfection-of-a20-gene-prevents-kidney-from-ischemia-reperfusion-injury-in-rats
#13
Lixin Wei, Xianghui Zhang, Qiuping Ye, Yueer Yang, Xiaowen Chen
Ischemia/reperfusion may induce inflammation and cell death through the nuclear factor (NF)‑κB signaling pathway. As a negative regulator of NF‑κB, zinc finger A20 exhibits anti-apoptotic and anti‑inflammatory effects in vitro. The present study was designed to upregulate A20 expression using an A20 transfection approach to investigate the in vivo protective effects of the A20 gene on renal ischemia reperfusion injury. The A20 gene was cloned into a pcDNA3.1 vector to construct the expression plasmid pcDNA3...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29065889/injury-induced-expression-of-caveolar-proteins-in-human-kidney-tubules-role-of-megakaryoblastic-leukemia-1
#14
Krzysztof M Krawczyk, Jennifer Hansson, Helén Nilsson, Katarzyna K Krawczyk, Karl Swärd, Martin E Johansson
BACKGROUND: Caveolae are membrane invaginations measuring 50-100 nm. These organelles, composed of caveolin and cavin proteins, are important for cellular signaling and survival. Caveolae play incompletely defined roles in human kidneys. Induction of caveolin-1/CAV1 in diseased tubules has been described previously, but the responsible mechanism remains to be defined. METHODS: Healthy and atrophying human kidneys were stained for caveolar proteins, (caveolin 1-3 and cavin 1-4) and examined by electron microscopy...
October 24, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29050225/hcarg-commd5-inhibits-erbb-receptor-driven-renal-cell-carcinoma
#15
Hiroyuki Matsuda, Carole G Campion, Kyoko Fujiwara, Jin Ikeda, Suzanne Cossette, Thomas Verissimo, Maiko Ogasawara, Louis Gaboury, Kosuke Saito, Kenya Yamaguchi, Satoru Takahashi, Morito Endo, Noboru Fukuda, Masayoshi Soma, Pavel Hamet, Johanne Tremblay
Hypertension-related, calcium-regulated gene (HCaRG/COMMD5) is highly expressed in renal proximal tubules, where it contributes to the control of cell proliferation and differentiation. HCaRG accelerates tubular repair by facilitating re-differentiation of injured proximal tubular epithelial cells, thus improving mouse survival after acute kidney injury. Sustained hyper-proliferation and de-differentiation are important hallmarks of tumor progression. Here, we demonstrate that cancer cells overexpressing HCaRG maintain a more differentiated phenotype, while several of them undergo autophagic cell death...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29045706/kidney-injury-molecule-1-staining-in-renal-allograft-biopsies-10-days-after-transplantation-is-inversely-correlated-with-functioning-proximal-tubular-epithelial-cells
#16
Jonna R Bank, Pieter van der Pol, Dianne Vreeken, Catherine Monge-Chaubo, Ingeborg M Bajema, Nicole Schlagwein, Daniëlle J van Gijlswijk, Sandra W van der Kooij, Marlies E J Reinders, Johan W de Fijter, Cees van Kooten
Background: Kidney injury molecule-1 (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL) are promising biomarkers for monitoring delayed graft function (DGF) after kidney transplantation. Here we investigated localization and distribution of KIM-1 and NGAL staining in renal allograft biopsies and studied their association with histological features, functional DGF (fDGF) and the tubular function slope (TFS), a functioning proximal tubular epithelial cell (PTEC) marker. Methods: Day 10 protocol biopsies of 64 donation after circulatory death recipients were stained for KIM-1 and NGAL and the positive area was quantified using ImageJ software...
October 16, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29039466/rack1-silencing-attenuates-renal-fibrosis-by-inhibiting-tgf-%C3%AE-signaling
#17
Jie Feng, Liyi Xie, Ranran Kong, Yali Zhang, Kehui Shi, Wanhong Lu, Hongli Jiang
The receptor for activated C-kinase 1 (RACK1) is a member of the WD40-repeat family of proteins and has been reported to be implicated in the development of liver fibrosis. However, the role of RACK1 in renal fibrosis remains unclear. Therefore, in this study, we investigated the effects of RACK1 on transforming growth factor-β1 (TGF-β1)-treated human proximal tubular epithelial cells and aimed to elucidate the possible mechanisms responsible for its anti-fibrotic effects. Our results revealed that RACK1 was highly expressed in the renal fibrotic tissues and TGF-β1-treated HK-2 cells...
September 27, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29037855/nephrosphere-derived-cells-are-induced-to-multilineage-differentiation-when-cultured-on-human-decellularized-kidney-scaffolds
#18
Silvia Bombelli, Chiara Meregalli, Carla Scalia, Giorgio Bovo, Barbara Torsello, Sofia De Marco, Massimiliano Cadamuro, Paolo Viganò, Guido Strada, Giorgio Cattoretti, Cristina Bianchi, Roberto A Perego
In end-stage chronic kidney disease, the option of organ transplantation is limited because of the scarce availability of kidneys. The combination of stem cell research, regenerative medicine, and tissue engineering seems a promising approach to produce new transplantable kidneys. Currently, the possibility to repopulate naturally obtained scaffolds with cells of different sources is advancing. Our aim was to test, for the first time, whether the nephrosphere (NS) cells, composed by renal stem/progenitor-like cells, were able to repopulate different nephron portions of renal extracellular matrix scaffolds obtained after decellularization of human renal tissue slices...
October 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29032370/an-immunofluorescence-assay-for-extracellular-matrix-components-highlights-the-role-of-epithelial-cells-in-producing-a-stable-fibrillar-extracellular-matrix
#19
Omar S Qureshi, Hélène Bon, Breda Twomey, Gill Holdsworth, Kirsty Ford, Marianne Bergin, Linghong Huang, Mariusz Muzylak, Louise J Healy, Vanessa Hurdowar, Timothy S Johnson
Activated fibroblasts are considered major drivers of fibrotic disease progression through the production of excessive extracellular matrix (ECM) in response to signals from damaged epithelial and inflammatory cells. Nevertheless, epithelial cells are capable of expressing components of the ECM, cross-linking enzymes that increase its stability and are sensitive to factors involved in the early stages of fibrosis. We therefore wanted to test the hypothesis that epithelial cells can deposit ECM in response to stimulation in a comparable manner to fibroblasts...
October 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28993569/immunolocalization-of-%C3%AE-catenin-e-cadherin-and-n-cadherin-in-neonate-and-adult-rat-kidney
#20
Naomi Terada, Mohammad Rabiul Karim, Takeshi Izawa, Mitsuru Kuwamura, Jyoji Yamate
β-catenin, E-cadherin and N-cadherin are adhesion molecules that play important roles in organogenesis, tissue homeostasis, renal epithelial integrity and polarity. The present study demonstrated their immunolocalization in adult and neonate rat kidney. Membranous or cytoplasmic expression of β-catenin, E-cadherin and N-cadherin were seen in adult and developing renal tubular epithelial cells. Particularly, in adult kidney, E-cadherin and β-catenin were intensively expressed in distal renal tubules, whereas N-cadherin was expressed in proximal renal tubules...
October 6, 2017: Journal of Veterinary Medical Science
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