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Tubule epithelial cell

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https://www.readbyqxmd.com/read/29673704/synergistic-action-of-the-nephrotoxic-mycotoxins-ochratoxin-a-and-citrinin-at-nanomolar-concentrations-in-human-proximal-tubule-derived-cells
#1
Marie-Christin Schulz, Luise Schumann, Ulrike Rottkord, Hans-Ulrich Humpf, Michael Gekle, Gerald Schwerdt
Increased ochratoxin A (OTA) or citrinin (CIT) concentrations in food correlate with increased prevalence of tubule-interstitial nephropathy. We tested the hypothesis that co-exposure of human proximal tubule-derived epithelial cells (HK-2) to OTA and CIT promotes synergistic events indicative for inflammation, epithelial-to-mesenchymal-transition (EMT) or fibrosis. We measured markers of inflammation, EMT and fibrosis and investigated the role of MAP-kinases. Only concurrent but not individual exposure to OTA and CIT at nanomolar concentrations led to (i) an increase of TNF protein and mRNA, (ii) a decrease of COX-2 protein and mRNA, (iii) a decrease of E-cadherin protein and (iv) an increase of vimentin and α-SMA protein...
April 16, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29671622/changes-in-kidney-tissue-and-effects-of-erythropoietin-after-acute-heart-failure
#2
A Güven Bağla, M Içkin Gülen, F Ercan, F Aşgün, E Ercan, C Bakar
Impairment of cardiac function causes renal damage. Renal failure after heart failure is attributed to hemodynamic derangement including reduced renal perfusion and increased venous pressure. One mechanism involves apoptosis and is defined as cardiorenal syndrome type 1. Erythropoietin (EPO) is a cytokine that induces erythropoiesis under hypoxic conditions. Hypoxia inducible factor 1 alpha (HIF-1α) plays a regulatory role in cellular response to hypoxia. Protective effects of EPO on heart, kidney and nervous system are unrelated to red blood cell production...
April 19, 2018: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/29670389/fgf23-modulates-the-effects-of-erythropoietin-on-gene-expression-in-renal-epithelial-cells
#3
Mitsuru Yashiro, Masaki Ohya, Toru Mima, Yumi Ueda, Yuri Nakashima, Kazuki Kawakami, Yohei Ishizawa, Shuto Yamamoto, Sou Kobayashi, Takurou Yano, Yusuke Tanaka, Kouji Okuda, Tomohiro Sonou, Tomohiro Shoshihara, Yuko Iwashita, Yu Iwashita, Kouichi Tatsuta, Ryo Matoba, Shigeo Negi, Takashi Shigematsu
Background: FGF23 plays an important role in calcium-phosphorus metabolism. Other roles of FGF23 have recently been reported, such as commitment to myocardium enlargement and immunological roles in the spleen. In this study, we aimed to identify the roles of FGF23 in the kidneys other than calcium-phosphorus metabolism. Methods: DNA microarrays and bioinformatics tools were used to analyze gene expression in mIMCD3 mouse renal tubule cells following treatment with FGF23, erythropoietin and/or an inhibitor of ERK...
2018: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/29665669/-effects-of-intermittent-hypoxia-exposure-on-renal-tubular-epithelial-cell-injury-and-autophagy-in-rats
#4
C Wang, J Tan, B Y Chen, Q Zhang
Objective: To investigate the effects of intermittent hypoxia (IH) exposure on renal tubular epithelial cell injury and autophagy in rats. Methods: A total of 12 Sprague Dawley (SD) rats were randomly divided into two groups: normal control (NC) group and IH group, with 6 rats in each group. An IH animal model was established to observe the effects of IH on renal tubular epithelial cell damage and autophagy in rats. Microalbumin (mAlb) was detected by immunoturbidimetry. Neutrophil gelatinase-associated lipocalin (NGAL) and kidney injury molecule-1(KIM-1)in urine were assessed by enzyme-linked immunosorbent assay (ELISA) test...
March 27, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29655784/aristolochic-acid-i-interferes-with-the-expression-of-blcap-tumor-suppressor-gene-in-human-cells
#5
Ying-Tzu Huang, Ting-Shuan Wu, Chuan-Chen Lu, Feng-Yih Yu, Biing-Hui Liu
Aristolochic acid I (AAI) is a phytocompound that is linked to the progressive renal disease and development of human urothelial carcinoma. The bladder cancer-associated protein (BLCAP) gene exhibits a tumor suppressor function in various tumors, including bladder carcinoma. This study evaluated the effect of AAI on BLCAP expression and its associated mechanism in human cells. Administering AAI to human embryonic kidney cells (HEK293), human proximal tubule epithelial cells (HK-2) and urinary bladder cancer cells (HT-1376) significantly reduced the expression of BLCAP mRNA and protein...
April 12, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29651426/4-hydroxy-2-nonenal-alkylated-and-peroxynitrite-nitrated-proteins-localize-to-the-fused-mitochondria-in-malpighian-epithelial-cells-of-type-iv-collagen-drosophila-mutants
#6
András A Kiss, Nikoletta Popovics, Zsolt Boldogkői, Katalin Csiszár, Mátyás Mink
Background . Human type IV collagenopathy is associated with mutations within the COL4A1 and to a less extent the COL4A2 genes. The proteins encoded by these genes form heterotrimers and are the highest molar ratio components of the ubiquitous basement membrane. The clinical manifestations of the COL4A1/A2 mutations are systemic affecting many tissues and organs among these kidneys. In order to uncover the cellular and biochemical alterations associated with aberrant type IV collagen, we have explored the phenotype of the Malpighian tubules, the secretory organ and insect kidney model, in col4a1 collagen gene mutants of the fruit fly Drosophila melanogaster ...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29644110/ameliorative-effect-of-vitamin-b12-on-seminiferous-epithelium-of-cimetidine-treated-rats-a-histopathological-immunohistochemical-and-ultrastructural-study
#7
Wael M Elsaed, Raouf Fekry Bedeer, Mohamed Ahmed Eladl
Cimetidine is an H2 receptor antagonist that has an antiandrogenic effect. It intervenes with the conversion of testosterone into estrogen in the Sertoli cells with accompanying testicular structural changes. In the present study, the microscopic and the ultrastructural changes induced by cimetidine and the effect of vitamin B12 as a protective agent on rat testes were studied. Immunoexpression of estrogen receptor β (ERβ) in testes was evaluated. Twenty-four adult male rats were divided into four groups: control, cimetidine-treated, vitamin B12 treated, and combined cimetidine and vitamin B12 treated...
March 2018: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29623482/nivolumab-induced-acute-granulomatous-tubulointerstitial-nephritis-in-a-patient-with-gastric-cancer
#8
Yoshihisa Nakatani, Hisato Kawakami, Masashi Ichikawa, Sachiyo Yamamoto, Yasuo Otsuka, Akiko Mashiko, Yasutoshi Takashima, Akihiko Ito, Kazuhiko Nakagawa, Shuji Arima
We here report a case of nivolumab-induced acute granulomatous tubulointerstitial nephritis in a patient with gastric cancer. A 68-year-old woman with recurrent gastric cancer developed acute kidney injury associated with kidney enlargement and urinary leukocytes after 38 cycles of nivolumab treatment. A diagnosis of acute granulomatous tubulointerstitial nephritis was made based on kidney biopsy findings. Immunohistochemistry revealed expression of programmed cell death-ligand 1 (PD-L1) in degenerated epithelial cells of collecting tubules...
April 6, 2018: Investigational New Drugs
https://www.readbyqxmd.com/read/29621145/zebrafish-as-a-model-system-for-investigating-the-compensatory-regulation-of-ionic-balance-during-metabolic-acidosis
#9
REVIEW
Lletta Lewis, Raymond W M Kwong
Zebrafish ( Danio rerio ) have become an important model for integrative physiological research. Zebrafish inhabit a hypo-osmotic environment; to maintain ionic and acid-base homeostasis, they must actively take up ions and secrete acid to the water. The gills in the adult and the skin at larval stage are the primary sites of ionic regulation in zebrafish. The uptake of ions in zebrafish is mediated by specific ion transporting cells termed ionocytes. Similarly, in mammals, ion reabsorption and acid excretion occur in specific cell types in the terminal region of the renal tubules (distal convoluted tubule and collecting duct)...
April 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29620271/mir%C3%A2-152-regulates-tgf%C3%A2-%C3%AE-1%C3%A2-induced-epithelial%C3%A2-mesenchymal-transition-by-targeting-hpip-in-tubular-epithelial-cells
#10
Ya-Xian Ning, Xiao-Yuan Wang, Jian-Qin Wang, Rong Zeng, Gou-Qin Wang
Renal fibrosis is a common pathological feature of chronic kidney diseases, and their development and progression are influenced by epigenetic modifications including aberrant microRNA (miRNA or miR) expression. miRNAs have been demonstrated to modulate the aggressiveness of various cancers and have emerged as possible therapeutic agents for the management of renal fibrosis. Transforming growth factor β1 (TGF‑β1)‑induced epithelial‑mesenchymal transition (EMT) of tubular epithelial cells serves a role in the initiation and progression of renal fibrosis...
April 3, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29620262/dynamic-expression-and-roles-of-sequestome%C3%A2-1-p62-in-lps%C3%A2-induced-acute-kidney-injury-in-mice
#11
Ting Li, Jie Zhao, Shuying Miao, Yunfei Xu, Xianzhong Xiao, Ying Liu
Acute kidney injury (AKI) is one of the most common complications of sepsis. The roles of autophagy in AKI have been demonstrated in previous studies. Sequestosome‑1 (p62) has been demonstrated to serve essential roles in autophagy. The dysregulation of autophagy causes p62 accumulation, which is associated with increased inflammation and tumorigenesis. However, the expression patterns and role of p62 in septic AKI remain unknown. The present study detected the renal autophagy level, and the expression and localization of p62, in a lipopolysaccharide (LPS)‑induced AKI mouse model...
March 28, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29619879/cisplatin-induced-oxidative-stress-stimulates-renal-fas-ligand-shedding
#12
Hitesh Soni, Damian Kaminski, Rajashekhar Gangaraju, Adebowale Adebiyi
Acute kidney injury (AKI), a significant complication of cisplatin chemotherapy is associated with reactive oxygen species (ROS)-dependent renal cell death, but the cellular targets of ROS in cisplatin nephrotoxicity are not fully resolved. Here, we investigated cisplatin-induced oxidative renal damage and tested the hypothesis that ROS-dependent shedding of death activator Fas ligand (FasL) occurs in cisplatin nephropathy. We show that intraperitoneal injection of sulfobutyl ether-β-cyclodextrin (Captisol™)-solubilized cisplatin elevated the level of lipid peroxidation product malondialdehyde in mouse kidneys and urinary concentration of oxidative DNA damage biomarker 8-hydroxy-2'-deoxyguanosine...
November 2018: Renal Failure
https://www.readbyqxmd.com/read/29606134/tgr5-expression-in-normal-kidney-and-renal-neoplasms
#13
Chaohui Lisa Zhao, Ali Amin, Yiang Hui, Dongfang Yang, Weibiao Cao
BACKGROUND: The G protein-coupled bile acid receptor (TGR5) is a cell surface receptor which induces the production of intracellular cAMP and promotes epithelial-mesenchymal transition in gastric cancer cell lines. TGR5 is found in a wide variety of tissues including the kidney. However, the patterns of TGR5 expression have not been well characterized in physiologic kidney or renal neoplasms. We explore the expression of TGR5 in benign renal tissue and renal neoplasms and assess its utility as a diagnostic marker...
April 2, 2018: Diagnostic Pathology
https://www.readbyqxmd.com/read/29605095/activated-renal-tubular-wnt-%C3%AE-catenin-signaling-triggers-renal-inflammation-during-overload-proteinuria
#14
Dickson W L Wong, Wai Han Yiu, Kam Wa Chan, Ye Li, Bin Li, Sarah W Y Lok, Makoto M Taketo, Peter Igarashi, Loretta Y Y Chan, Joseph C K Leung, Kar Neng Lai, Sydney C W Tang
Imbalance of Wnt/β-catenin signaling in renal cells is associated with renal dysfunction, yet the precise mechanism is poorly understood. Previously we observed activated Wnt/β-catenin signaling in renal tubules during proteinuric nephropathy with an unknown net effect. Therefore, to identify the definitive role of tubular Wnt/β-catenin, we generated a novel transgenic "Tubcat" mouse conditionally expressing stabilized β-catenin specifically in renal tubules following tamoxifen administration...
March 28, 2018: Kidney International
https://www.readbyqxmd.com/read/29603402/expression-of-crym-in-different-rat-organs-during-development-and-its-decreased-expression-in-degenerating-pyramidal-tracts-in-amyotrophic-lateral-sclerosis
#15
Reiji Hommyo, Satoshi O Suzuki, Nona Abolhassani, Hideomi Hamasaki, Masahiro Shijo, Norihisa Maeda, Hiroyuki Honda, Yusaku Nakabeppu, Toru Iwaki
The protein μ-crystallin (CRYM) is a novel component of the marsupial lens that has two functions: it is a key regulator of thyroid hormone transportation and a reductase of sulfur-containing cyclic ketimines. In this study, we examined changes of the expression pattern of CRYM in different rat organs during development using immunohistochemistry and immunoblotting. As CRYM is reportedly expressed in the corticospinal tract, we also investigated CRYM expression in human cases of amyotrophic lateral sclerosis (ALS) using immunohistochemistry...
March 30, 2018: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/29593848/saturated-fatty-acids-bound-to-albumin-enhance-osteopontin-expression-and-cleavage-in-renal-proximal-tubular-cells
#16
Alyssa Cobbs, Kristopher Ballou, Xiaoming Chen, Jasmine George, Xueying Zhao
Osteopontin (OPN) is one of the proinflammatory cytokines upregulated in the kidneys of diabetic animals and patients with nephropathy. An increase in urinary albumin and albumin-bound fatty acids (FA) presents a proinflammatory environment to the proximal tubules in proteinuric kidney diseases including diabetic nephropathy. This study was designed to examine if FA overload could stimulate OPN expression and cleavage in renal tubule epithelial cells. OPN gene and protein expression was examined in the kidney of Zucker diabetic (ZD) rats and cultured proximal tubular cells exposed to either bovine serum albumin (BSA) or BSA conjugated with palmitic acid (PA), the most abundant saturated plasma FA...
2018: International Journal of Physiology, Pathophysiology and Pharmacology
https://www.readbyqxmd.com/read/29592526/combination-exposure-of-melamine-and-cyanuric-acid-is-associated-with-polyuria-and-activation-of-nlrp3-inflammasome-in-rats
#17
Feifei Wang, Qiaojuan Liu, Lizi Jin, Shan Hu, Renfei Luo, Mengke Han, Yonggong Zhai, Weidong Wang, Chunling Li
The molecular mechanism of melamine-induced renal toxicity have not been fully understood. The purpose of the study aimed to investigate whether melamine and cyanuric acid induced NLRP3 inflammasome activation in the kidney, which may contribute to abnormal water and sodium handling in a rat model. Wistar rats were received melamine (Mel, 200 mg/kg BW/day), cyanuric acid (CA, 200 mg/kg BW/day), or Mel plus CA (Mel+CA, 100 mg/kg BW/day, each) for two weeks. Mel+CA caused damaged tubular epithelial structure and organelles, dilated tubular lumen, and inflammatory responses...
March 28, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29590662/urinary-iron-excretion-is-associated-with-urinary-full-length-megalin-and-renal-oxidative-stress-in-chronic-kidney-disease
#18
Shinya Nakatani, Ayumi Nakatani, Eiji Ishimura, Norikazu Toi, Akihiro Tsuda, Katsuhito Mori, Masanori Emoto, Yoshiaki Hirayama, Akihiko Saito, Masaaki Inaba
BACKGROUND/AIMS: Megalin mediates the uptake of glomerular-filtered iron in the proximal tubules. Urinary full length megalin (C-megalin) excretion has been found to be increased in association with megalin-mediated metabolic load to the endo-lysosomal system in proximal tubular epithelial cells (PTECs) of residual nephrons. In the present study, we investigated the association between urinary iron and C-megalin in chronic kidney disease (CKD) patients, and the possible harmful effect of iron in renal tubules...
March 22, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29590647/mir-142-3p-inhibits-tgf-%C3%AE-3-induced-blood-testis-barrier-impairment-by-targeting-lethal-giant-larvae-homolog-2
#19
Ying Xu, Weixing Wu, Yunxia Fan, Shuyi Jiang, Xiaoyu Jia, Wenhui Su
BACKGROUND/AIMS: Transforming growth factor-β3 (TGF-β3) has been proved to perturb the blood-testis barrier (BTB) by accelerating junction protein endocytosis in Sertoli cells (SCs) to accommodate the traversing of preleptotene spermatocytes across the BTB around stage VIII in rat. Yet the molecular network underlying the impairment of TGF-β3 on BTB integrity is not fully elucidated. Our study herein was designed to investigate the participation of microRNA-142-3p (miR-142-3p), which has been reported to affect TGF-β3 signaling via different pathways, during BTB dynamics and the corresponding mechanisms...
March 22, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29589443/nanomolar-potency-1-2-4-triazoloquinoxaline-inhibitors-of-the-kidney-urea-transporter-a1-ut-a1
#20
Sujin Lee, Onur Cil, Elena Diez-Cecilia, Marc O Anderson, Alan S Verkman
Urea transporter-A (UT-A) isoforms encoded by the Slc14a2 gene are expressed in kidney tubule epithelial cells where they facilitate urinary concentration. UT-A1 inhibition is predicted to produce a unique, salt-sparing diuretic action in edema and hyponatremia. Here, we report the discovery of 1,2,4-triazoloquinoxalines and analysis of 37 synthesized analogs. The most potent compound, 8ay, containing 1,2,4-triazolo[4,3-a]quinoxaline substituted benzenesulfonamide linked by an aryl ether, rapidly and reversibly inhibited UT-A1 urea transport by a non-competitive mechanism with IC50 ~150 nM; IC50 was ~2 µM for the related urea transporter UT-B encoded by the Slc14a1 gene...
March 28, 2018: Journal of Medicinal Chemistry
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