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Tubule epithelial cell

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https://www.readbyqxmd.com/read/28945024/-pathogenesis-and-treatment-of-insulin-resistance-in-chronic-kidney-disease-and-interventional-effects-of-chinese-herbal-medicine
#1
REVIEW
Wei Wu, Jing-Jing Yang, Yi-Gang Wan, Yue Tu, Ge Shi, Wen-Bei Han, Bu-Hui Liu, Jian Yao
The kidney is the target organ of insulin with abundant insulin receptors. Thereinto,the renal intrinsic cells including glomerular podocytes,endothelial cells,mesangial cells,renal tubular epitheliums and collecting duct epithelial cells are all highly sensitive to insulin as the effector cells. Furthermore,the structural and functional abnormalities of these cells are closely related to insulin and its receptors activity. It is reported that the chronic kidney disease(CKD)patients have systemic or renal insulin resistance(IR)...
January 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28929120/sulodexide-protects-renal-tubular-epithelial-cells-from-oxidative-stress-induced-injury-via-upregulating-klotho-expression-at-an-early-stage-of-diabetic-kidney-disease
#2
Yu Ning Liu, Jingwei Zhou, Tingting Li, Jing Wu, Shu Hua Xie, Hua-Feng Liu, Zhangsuo Liu, Tae Sun Park, Yaoxian Wang, Wei Jing Liu
The hypoalbuminuric effect of sulodexide (SDX) on diabetic kidney disease (DKD) was suggested by some clinical trials but was denied by the Collaborative Study Group. In this study, the diabetic rats were treated with SDX either from week 0 to 24 or from week 13 to 24. We found that 24-week treatment significantly decreased the urinary protein and HAVCR1 excretion, inhibited the interstitial expansion, and downregulated the renal cell apoptosis and interstitial fibrosis. Renoprotection was also associated with a reduction in renocortical/urinary oxidative activity and the normalization of renal klotho expression...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28919632/cd36-in-chronic-kidney-disease-novel-insights-and-therapeutic-opportunities
#3
REVIEW
Xiaochun Yang, Daryl M Okamura, Xifeng Lu, Yaxi Chen, John Moorhead, Zac Varghese, Xiong Z Ruan
CD36 (also known as scavenger receptor B2) is a multifunctional receptor that mediates the binding and cellular uptake of long-chain fatty acids, oxidized lipids and phospholipids, advanced oxidation protein products, thrombospondin and advanced glycation end products, and has roles in lipid accumulation, inflammatory signalling, energy reprogramming, apoptosis and kidney fibrosis. Renal CD36 is mainly expressed in tubular epithelial cells, podocytes and mesangial cells, and is markedly upregulated in the setting of chronic kidney disease (CKD)...
September 18, 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/28878224/mild-intracellular-acidification-by-dexamethasone-attenuates-mitochondrial-dysfunction-in-a-human-inflammatory-proximal-tubule-epithelial-cell-model
#4
T J J Schirris, J Jansen, M Mihajlovic, L P van den Heuvel, R Masereeuw, F G M Russel
Septic acute kidney injury (AKI) associates with poor survival rates and often requires renal replacement therapy. Glucocorticoids may pose renal protective effects in sepsis via stimulation of mitochondrial function. Therefore, we studied the mitochondrial effects of dexamethasone in an experimental inflammatory proximal tubule epithelial cell model. Treatment of human proximal tubule epithelial cells with lipopolysaccharide (LPS) closely resembles pathophysiological processes during endotoxaemia, and led to increased cytokine excretion rates and cellular reactive oxygen species levels, combined with a reduced mitochondrial membrane potential and respiratory capacity...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877670/indoleamine-2-3-dioxygenase-ido-increases-during-renal-fibrogenesis-and-its-inhibition-potentiates-tgf-%C3%AE-1-induced-epithelial-to-mesenchymal-transition
#5
Luiz Henrique Gomes Matheus, Gislene Mendes Simão, Taíssa Altieri Amaral, Rodrigo Barbosa Oliveira Brito, Camila Soares Malta, Yves Silva Teles Matos, Alexandre Chagas Santana, Gabriela Gomes Cardoso Rodrigues, Maria Clara Albejante, Erna Elisabeth Bach, Maria Aparecida Dalboni, Cleber Pinto Camacho, Humberto Dellê
BACKGROUND: Indoleamine 2, 3-dioxygenase (IDO) is an immunomodulatory molecule that has been implicated in several biological processes. Although IDO has been linked with some renal diseases, its role in renal fibrosis is still unclear. Because IDO may be modulated by TGF-β1, a potent fibrogenic molecule, we hypothesized that IDO could be involved in renal fibrosis, especially acting in the TGF-β1-induced tubular epithelial-mesenchymal transition (EMT). We analyzed the IDO expression and activity in a model of renal fibrogenesis, and the effect of the IDO inhibitor 1-methyl-tryptophan (MT) on TGF-β1-induced EMT using tubular cell culture...
September 6, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28877240/runx1-mediates-the-development-of-the-granular-convoluted-tubules-in-the-submandibular-glands
#6
Hitomi Ono Minagi, Safiye Esra Sarper, Hiroshi Kurosaka, Koh-Ichi Kuremoto, Ichiro Taniuchi, Takayoshi Sakai, Takashi Yamashiro
The mouse granular convoluted tubules (GCTs), which are only located in the submandibular gland (SMG) are known to develop and maintain their structure in an androgen-dependent manner. We previously demonstrated that the GCTs are involuted by the epithelial deletion of core binding factor β (CBFβ), a transcription factor that physically interacts with any of the Runt-related transcription factor (RUNX) proteins (RUNX1, 2 and 3). This result clearly demonstrates that the Runx /Cbfb signaling pathway is indispensable in the development of the GCTs...
2017: PloS One
https://www.readbyqxmd.com/read/28873177/hypoxia-inducible-factor-dependent-expression-of-angiopoietin-like-4-by-conjunctival-epithelial-cells-promotes-the-angiogenic-phenotype-of-pterygia
#7
Qianli Meng, Yaowu Qin, Monika Deshpande, Fabiana Kashiwabuchi, Murilo Rodrigues, Qiaozhi Lu, Hui Ren, Jennifer H Elisseeff, Gregg L Semenza, Silvia V Montaner, Akrit Sodhi
Purpose: Disappointing results from clinical studies assessing the efficacy of therapies targeting vascular endothelial growth factor (VEGF) for the treatment of pterygia suggest that other angiogenic mediators may also play a role in its development. We therefore explore the relative contribution of VEGF, hypoxia-inducible factor (HIF)-1α (the transcription factor that regulates VEGF expression in ocular neovascular disease), and a second HIF-regulated mediator, angiopoietin-like 4 (ANGPTL4), to the angiogenic phenotype of pterygia...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28870626/immunoreactivity-of-urate-transporters-glut9-and-urat1-is-located-in-epithelial-cells-of-the-choroid-plexus-of-human-brains
#8
Naoya Uemura, Ryuta Murakami, Yoichi Chiba, Ken Yanase, Ryuji Fujihara, Masato Mashima, Koichi Matsumoto, Machi Kawauchi, Gotaro Shirakami, Masaki Ueno
It has been suggested that urate plays a protective role in neurons, while hyperuricemia is correlated with atherosclerosis and cardiovascular disease. However, whether there is a system that directly transports urate into the brain remains to be clarified. In this study, the localization of glucose transporter 9 (GLUT9) and urate transporter 1 (URAT1), which are known to be representative reabsorptive urate transporters, was immunohistochemically examined in autopsied human brains. Immunoreactivity of GLUT9 was observed on the apical side of the cytoplasm of epithelial cells in the choroid plexus and in the cilia of ependymal cells of the human brain...
September 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28862701/deletion-of-nedd4-2-results-in-progressive-kidney-disease-in-mice
#9
Tanya L Henshall, Jantina A Manning, Omri S Alfassy, Pranay Goel, Natasha A Boase, Hiroshi Kawabe, Sharad Kumar
NEDD4-2 (NEDD4L), a ubiquitin protein ligase of the Nedd4 family, is a key regulator of cell surface expression and activity of the amiloride-sensitive epithelial Na(+) channel (ENaC). While hypomorphic alleles of Nedd4-2 in mice show salt-sensitive hypertension, complete knockout results in pulmonary distress and perinatal lethality due to increased cell surface levels of ENaC. We now show that Nedd4-2 deficiency in mice also results in an unexpected progressive kidney injury phenotype associated with elevated ENaC and Na(+)Cl(-) cotransporter expression, increased Na(+) reabsorption, hypertension and markedly reduced levels of aldosterone...
September 1, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28861315/renal-angiomyoadenomatous-tumour
#10
P S Jayalakshmy, Merin Jose, M Feroze, Rajesh K Kumar
Renal angiomyoadenomatous tumour is a newly described rare neoplasm. This tumour is characterised microscopically by admixture of three components- epithelial cells arranged in tubules and nests, angiomyomatous stroma and capillary sized interconnecting vascular channels in close association with the epithelial cell clusters. Microscopically it has wide range of differential diagnoses which include mixed epithelial and stromal tumour of kidney, angiomyolipoma and clear cell renal cell carcinoma with angiomyolipomatous/angiomyoadenomatous areas...
September 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/28859984/epstein-barr-virus-encoded-latent-membrane-protein-1-induces-epithelial-to-mesenchymal-transition-by-inducing-v-set-ig-domain-containing-4-vsig4-expression-via-nf-kb-in-renal-tubular-epithelial-hk-2%C3%A2-cells
#11
Seung-Mi Kim, Se Won Oh, Sang Hyun Park, Dae Young Hur, Seung-Woo Hong, Sang Youb Han
The epithelial to mesenchymal transition (EMT), a hallmark of chronic kidney disease, is a key event in the conversion from tubular epithelial cells to myofibroblasts in renal fibrosis. Epstein-Barr virus (EBV) is a γ-herpes oncovirus associated with chronic kidney disease. However, the relationship between EBV and the EMT process in renal tubular epithelial cells is not well understood. Among EBV-latent genes, EBV-encoded latent membrane protein 1 (LMP1) induces EMT by regulating a variety of molecules in EBV-induced oncogenic transformation...
August 30, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28852907/functional-role-of-suv39h1-in-human-renal-tubular-epithelial-cells-under-high-glucose-ambiance
#12
Jiayi Wang, Wenzhe Yan, Xiaofei Peng, Yafeng Jiang, Liyu He, Youming Peng, Xian Chen, Muyao Ye, Hui Zhuo
SUV39H1, the histone methyltransferase (HMTase) of histone H3 lysine 9 trimethylation (H3K9me3), is a known transcriptional repressor of inflammatory genes. The effect of SUV39H1 on inflammatory gene promoters under high-glucose stimulation in vascular smooth muscle cells (VSMCs), macrophages, and cardiomyocytes has been studied, but how SUV39H1 functions in renal tubules under diabetic conditions is unclear. Renal biopsy specimens of ten diabetic nephropathy (DN) subjects and seven non-DN minimal change diseases (MCD) subjects were collected...
August 29, 2017: Inflammation
https://www.readbyqxmd.com/read/28843412/single-tubule-rna-seq-uncovers-signaling-mechanisms-that-defend-against-hyponatremia-in-siadh
#13
Jae Wook Lee, Mohammad Alsady, Chung-Lin Chou, Theun de Groot, Peter M T Deen, Mark A Knepper, Carolyn M Ecelbarger
In the syndrome of inappropriate antidiuretic hormone secretion (SIADH), hyponatremia is limited by onset of vasopressin-escape caused by loss of the water channel aquaporin-2 in the renal collecting duct despite high circulating vasopressin. Here, we use the methods of systems biology in a well-established rat model of SIADH to identify signaling pathways activated at the onset of vasopressin-escape. Using single-tubule RNA-Seq, full transcriptomes were determined in microdissected cortical collecting ducts of vasopressin-treated rats at 1, 2, and 4 days after initiation of oral water loading in comparison to time-control rats without water loading...
August 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28829430/optical-quantification-of-intracellular-ph-in-drosophila-melanogaster-malpighian-tubule-epithelia-with-a-fluorescent-genetically-encoded-ph-indicator
#14
Adam J Rossano, Michael F Romero
Epithelial ion transport is vital to systemic ion homeostasis as well as maintenance of essential cellular electrochemical gradients. Intracellular pH (pHi) is influenced by many ion transporters and thus monitoring pHi is a useful tool for assessing transporter activity. Modern Genetically Encoded pH-Indicators (GEpHIs) provide optical quantification of pHi in intact cells on a cellular and subcellular scale. This protocol describes real-time quantification of cellular pHi regulation in Malpighian Tubules (MTs) of Drosophila melanogaster through ex vivo live-imaging of pHerry, a pseudo-ratiometric GEpHI with a pKa well-suited to track pH changes in the cytosol...
August 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28827476/angiotensin-ii-type-2-receptor-and-receptor-mas-are-colocalized-and-functionally-interdependent-in-obese-zucker-rat-kidney
#15
Sanket N Patel, Quaisar Ali, Preethi Samuel, Ulrike Muscha Steckelings, Tahir Hussain
The actions of angiotensin II type 2 receptor (AT2R) and the receptor Mas (MasR) are complex but show similar pronatriuretic function; particularly, AT2R expression and natriuretic function are enhanced in obese/diabetic rat kidney. In light of some reports suggesting a potential positive interaction between these receptors, we tested hypothesis that renal AT2R and MasR physically interact and are interdependent to stimulate cell signaling and promote natriuresis in obese rats. We found that infusion of AT2R agonist C21 in obese Zucker rats (OZR) increased urine flow and urinary Na excretion which were attenuated by simultaneous infusion of the AT2R antagonist PD123319 or the MasR antagonist A-779...
October 2017: Hypertension
https://www.readbyqxmd.com/read/28819999/high-glucose-induces-hgf-independent-activation-of-met-receptor-in-human-renal-tubular-epithelium
#16
Lucia Mesarosova, Peter Ochodnicky, Jaklien C Leemans, Sandrine Florquin, Peter Krenek, Jan Klimas
CONTEXT: The role of hepatocyte growth factor (HGF) in diabetic kidney damage remains controversial. OBJECTIVE: To test the hypothesis that high glucose levels activate pathways related to HGF and its receptor Met and that this could participate in glucose-induced renal cell damage. MATERIALS AND METHODS: HK2 cells, a human proximal tubule epithelial cell line, were stimulated with high glucose for 48 hours. Levels of pMet/Met, pEGFR/EGFR, pSTAT3/STAT3, pAkt/Akt and pERK1/2/ERK1/2 were studied by immunoblotting...
August 18, 2017: Journal of Receptor and Signal Transduction Research
https://www.readbyqxmd.com/read/28817830/microrna-200a-inhibits-transforming-growth-factor-%C3%AE-1-induced-proximal-tubular-epithelial-mesenchymal-transition-by-targeting-%C3%AE-catenin
#17
Yi Gong, Zhexue Qin, Baoshang Zhou, Hua Chen, Zhengmin Shi, Jing Zhang
BACKGROUND: The epithelial-mesenchymal transition (EMT) is a crucial event in the development of renal interstitial fibrosis (RIF). A growing body of evidence indicates that β-catenin plays an important role in various types of fibrosis. Although members of the microRNA (miRNA)-200 family have been suggested to suppress EMT in cancer and fibrosis, the function of miRNA-200a in regulating the progression of RIF is unknown. We speculate that miRNA-200a may hinder this progression through the suppression of β-catenin...
August 18, 2017: Nephron
https://www.readbyqxmd.com/read/28815213/identification-of-rab18-as-an-essential-host-factor-for-bk-polyomavirus-infection-using-a-whole-genome-rna-interference-screen
#18
Linbo Zhao, Michael J Imperiale
BK polyomavirus (BKPyV) is a human pathogen first isolated in 1971. BKPyV infection is ubiquitous in the human population, with over 80% of adults worldwide being seropositive for BKPyV. BKPyV infection is usually asymptomatic; however, BKPyV reactivation in immunosuppressed transplant patients causes two diseases, polyomavirus-associated nephropathy and hemorrhagic cystitis. To establish a successful infection in host cells, BKPyV must travel in retrograde transport vesicles to reach the nucleus. To make this happen, BKPyV requires the cooperation of host cell proteins...
July 2017: MSphere
https://www.readbyqxmd.com/read/28805677/endocytosis-of-albumin-induces-matrix-metalloproteinase-9-by-activating-the-erk-signaling-pathway-in-renal-tubule-epithelial-cells
#19
Xiaoming Chen, Alyssa Cobbs, Jasmine George, Ashmeer Chima, Fidele Tuyishime, Xueying Zhao
Matrix metalloproteinase-9 (MMP-9) is dysregulated in chronic kidney diseases including diabetic nephropathy. This study was performed to examine the expression of MMP-9 in renal tubule epithelial cells (TECs) under diabetic conditions and its regulatory mechanisms. We characterized MMP-9 protein in diabetic animals and primary cultured rat TECs exposed to exogenous albumin and high glucose. We also used specific inhibitors to determine if internalization of albumin and/or extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation were required for MMP-9 secretion...
August 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28796565/ultrastructural-changes-of-kidney-in-schistosoma-mansoni-infected-mice
#20
Refaat A Eid, Mubarak Al-Shraim, Fahmy El-Sayed, Khaled Radad
Schistosomiasis is the second threatening parasitic disease after malaria and among Schistosoma spp., Schistosoma mansoni (S. mansoni) affects about 100 million people in tropic regions in Africa and South America. The current study was carried out to investigate ultrastructural changes of the kidney in mice infected with cercariae of S. mansoni, in which 20 Swiss albino mice of 60-day-old were assigned into two groups (10 each). Control group received 1 ml normal saline by intraperitoneal route. Model group were intraperitoneally infected with 1 ml normal saline containing 40 cercariae of S...
August 10, 2017: Ultrastructural Pathology
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