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https://www.readbyqxmd.com/read/29236802/tadalafil-protector-effect-during-ischemia-reperfusion-in-rats
#1
Eduardo Gabriel Gerber Wietzikoski, Julio Cesar Foiatto, Nicolau Gregori Czeczko, Osvaldo Malafaia, Fernando Cesar Koleski, Tiago Cesar Mierzwa, Regina de Paula Xavier Gomes
PURPOSE: To evaluate histological parameters in rat renal tissue after tadalafil use during hot ischemia for 45 minutes and reperfusion for 24 hours. METHODS: Twenty rats were divided into 2 groups. In the experimental group 10 mg/kg of tadalafil was used per gavage before the procedure. All cases underwent left partial nephrectomy, followed by 45 minutes of warm ischemia. Left nephrectomy of the remaining kidney was performed after 24 hours from the initial procedure...
November 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29229337/receptor-protein-of-lysinibacillus-sphaericus-mosquito-larvicidal-toxin-displays-amylomaltase-activity
#2
Mahima Sharma, Gagan D Gupta, Vinay Kumar
The activated binary toxin (BinAB) from Lysinibacillus sphaericus binds to surface receptor protein (Cqm1) on the midgut cell membrane and kills Culex quinquefasciatus larvae on internalization. Cqm1 is attached to cells via a glycosyl-phosphatidylinositol (GPI) anchor. It has been classified as a member of glycoside hydrolase family 13 of the CAZy database. Here, we report characterization of the ordered domain (residues 23-560) of Cqm1. Gene expressing Cqm1 of BinAB susceptible mosquito was chemically synthesized and the protein was purified using E...
December 8, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29223554/oral-administration-of-nigella-sativa-oil-and-thymoquinone-attenuates-long-term-cisplatin-treatment-induced-toxicity-and-oxidative-damage-in-rat-kidney
#3
Zeba Farooqui, Faaiza Shahid, Aijaz Ahmed Khan, Farah Khan
Cisplatin (CP) is an effective anti-cancer drug which causes remarkable toxicity to the kidney, particularly to proximal tubules, by generating reactive oxygen species. Nigella sativa (NS), commonly known as "black cumin" reduces the progression of various kidney disorders. Thymoquinone (TQ), the major bioactive constituent of NS seeds, has been credited for various pharmacological effects of NS. Since, a typical clinical CP dosing regimen involves CP administration in multiple cycles over a long time duration, hence the present study aimed to evaluate the renoprotective efficacy of NS oil and TQ against multiple dose CP treatment induced deleterious biochemical and histological alterations in rat kidney...
December 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29215274/cry11aa-interacts-with-the-atp-binding-protein-from-culex-quinquefasciatus-to-improve-the-toxicity
#4
Lingling Zhang, Guohui Zhao, Xiaohua Hu, Jiannan Liu, Mingwei Li, Khadija Batool, Mingfeng Chen, Junxiang Wang, Jin Xu, Tianpei Huang, Xiaohong Pan, Lei Xu, Xiao-Qiang Yu, Xiong Guan
Cry11Aa displays high toxicity to the larvae of several mosquito species, including Aedes, Culex, and Anopheles. To study its binding characterization against Culex quinquefasciatus, Cry11Aa was purified and western blot results showed that Cry11Aa could bind successfully to the brush border membrane vesicles. To identify Cry11Aa-binding proteins in C. quinquefasciatus, a biotin-based protein pull-down experiment was performed and seven Cry11Aa-binding proteins were isolated from the midgut of C. quinquefasciatus larvae...
December 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29214163/protective-effects-of-pyridoxamine-supplementation-in-the-early-stages-of-diet-induced-kidney-dysfunction
#5
F Chiazza, A S Cento, D Collotta, D Nigro, G Rosa, F Baratta, V Bitonto, J C Cutrin, M Aragno, R Mastrocola, M Collino
Pyridoxamine, a structural analog of vitamin B6 that exerts antiglycative effects, has been proposed as supplementary approach in patients with initial diabetic nephropathy. However, the molecular mechanism(s) underlying its protective role has been so far slightly examined. C57Bl/6J mice were fed with a standard diet (SD) or a diet enriched in fat and fructose (HD) for 12 weeks. After 3 weeks, two subgroups of SD and HD mice started pyridoxamine supplementation (150 mg/kg/day) in the drinking water. HD fed mice showed increased body weight and impaired glucose tolerance, whereas pyridoxamine administration significantly improved insulin sensitivity, but not body weight, and reduced diet-induced increase in serum creatinine and urine albumin...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29198188/blood-lactose-after-dairy-product-intake-in-healthy-men
#6
Grégory Pimentel, Kathryn J Burton, Marta Rosikiewicz, Carola Freiburghaus, Ueli von Ah, Linda H Münger, François P Pralong, Nathalie Vionnet, Gilbert Greub, René Badertscher, Guy Vergères
The absence of a dedicated transport for disaccharides in the intestine implicates that the metabolic use of dietary lactose relies on its prior hydrolysis at the intestinal brush border. Consequently, lactose in blood or urine has mostly been associated with specific cases in which the gastrointestinal barrier is damaged. On the other hand, lactose appears in the blood of lactating women and has been detected in the blood and urine of healthy men, indicating that the presence of lactose in the circulation of healthy subjects is not incompatible with normal physiology...
December 4, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/29179690/unique-proximal-tubular-cell-injury-and-the-development-of-acute-kidney-injury-in-adult-patients-with-minimal-change-nephrotic-syndrome
#7
Yoshihide Fujigaki, Yoshifuru Tamura, Michito Nagura, Shigeyuki Arai, Tatsuru Ota, Shigeru Shibata, Fukuo Kondo, Yutaka Yamaguchi, Shunya Uchida
BACKGROUND: Adult patients with minimal change nephrotic syndrome (MCNS) are often associated with acute kidney injury (AKI). To assess the mechanisms of AKI, we examined whether tubular cell injuries unique to MCNS patients exist. METHODS: We performed a retrospective analysis of clinical data and tubular cell changes using the immunohistochemical expression of vimentin as a marker of tubular injury and dedifferentiation at kidney biopsy in 37 adult MCNS patients...
November 28, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29177025/acute-exposure-to-cigarette-smoking-followed-by-myocardial-infarction-aggravates-renal-damage-in-an-in-vivo-mouse-model
#8
Firas Kobeissy, Abdullah Shaito, Abdullah Kaplan, Lama Baki, Hassan Hayek, Carole Dagher-Hamalian, Ali Nehme, Rana Ghali, Emna Abidi, Ahmad Husari, Asad Zeidan, Fouad A Zouein, Kazem Zibara
Cigarette smoking (S) is a risk factor for progressive chronic kidney disease, renal dysfunction, and renal failure. In this study, the effect of smoking on kidney function was investigated in a mouse model of myocardial infarction (MI) using 4 groups: control (C), smoking (S), MI, and S+MI. Histological analysis of S+MI group showed alterations in kidney structure including swelling of the proximal convoluted tubules (PCTs), thinning of the epithelial lining, focal loss of the brush border of PCTs, and patchy glomerular retraction...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29157961/improvement-of-intestinal-absorption-of-curcumin-by-cyclodextrins-and-the-mechanisms-underlying-absorption-enhancement
#9
Xinpeng Li, Sachiyo Uehara, Kasirawat Sawangrat, Masaki Morishita, Kosuke Kusamori, Hidemasa Katsumi, Toshiyasu Sakane, Akira Yamamoto
Curcumin is known to possess a wide range of pharmacological activities for the treatment of chronic or inflammatory diseases, Alzheimer's disease, and various cancers. However, the therapeutic efficacy of curcumin is restricted by its poor bioavailability after oral administration. In this study, the effects of various cyclodextrins on the intestinal absorption of curcumin were evaluated in rat intestine by an in situ closed-loop method. Among the tested cyclodextrins, 50 mM α-cyclodextrin significantly enhanced the absorption of curcumin without inducing any intestinal toxicity...
November 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29150505/cry64ba-and-cry64ca-two-etx-mtx2-bacillus-thuringiensis-insecticidal-proteins-against-hemipteran-pests
#10
Yonglei Liu, Yinglong Wang, Changlong Shu, Kejian Lin, Fuping Song, Alejandra Bravo, Mario Soberón, Jie Zhang
Genetically modified crops that express insecticidal Bacillus thuringiensis (Bt) proteins have become a primary approach for control of lepidopteran (moth) and coleopteran (beetle) pests that feed by chewing the plants. However, the sap-sucking insects (Hemiptera) are not particularly susceptible to Bt toxins. In this study, we describe two Cry toxins (Cry64Ba and Cry64Ca) from a Bt 1012 strain showed toxicity against two important rice hemipteran pests, Laodelphax striatellus and Sogatella furcifera Both of these two proteins contain an ETX/MTX2 domain, and share common sequence features with the β-pore forming toxins...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29142988/proximal-tubular-expression-patterns-of-megalin-and-cubilin-in-proteinuric-nephropathies
#11
Jia Sun, Kjell Hultenby, Jonas Axelsson, Johan Nordström, Bing He, Annika Wernerson, Karin Lindström
Introduction: Receptor-mediated endocytosis is responsible for protein reabsorption in the proximal tubules. For albumin this process involves at least 2 interacting receptors, megalin and cubilin. Albumin is not usually present in the urine, indicating a highly efficient tubular reuptake under physiological conditions. However, early appearance of albuminuria may mean that the tubular system is overwhelmed by large quantities of albumin or that the function is impaired. Methods: To better understand the physiological role of megalin and cubilin in human renal disease, renal biopsies from 15 patients with a range of albuminuria and 3 healthy living donors were analyzed for proximal tubular expression of megalin and cubilin using immunohistochemistry (IHC) and semiquantitative immune-electron microscopy...
July 2017: KI Reports
https://www.readbyqxmd.com/read/29128884/effect-of-npt2b-deletion-on-intestinal-and-renal-inorganic-phosphate-pi-handling
#12
Kayo Ikuta, Hiroko Segawa, Shohei Sasaki, Ai Hanazaki, Toru Fujii, Aoi Kushi, Yuka Kawabata, Ruri Kirino, Sumire Sasaki, Miwa Noguchi, Ichiro Kaneko, Sawako Tatsumi, Otoya Ueda, Naoko A Wada, Hiromi Tateishi, Mami Kakefuda, Yosuke Kawase, Shuichi Ohtomo, Yasuhiro Ichida, Akira Maeda, Kou-Ichi Jishage, Naoshi Horiba, Ken-Ichi Miyamoto
BACKGROUND: Hyperphosphatemia is common in chronic kidney disease and is associated with morbidity and mortality. The intestinal Na(+)-dependent phosphate transporter Npt2b is thought to be an important molecular target for the prevention of hyperphosphatemia. The role of Npt2b in the net absorption of inorganic phosphate (Pi), however, is controversial. METHODS: In the present study, we made tamoxifen-inducible Npt2b conditional knockout (CKO) mice to analyze systemic Pi metabolism, including intestinal Pi absorption...
November 11, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29128560/renal-toxicity-of-nanoparticles-of-cadmium-sulphide-in-rat
#13
Kavita Rana, Yeshvandra Verma, Varsha Rani, Suresh Vir Singh Rana
During present investigations, renal toxicity of CdSNPs (cadmium sulphide nanoparticles) (ranged 5-9 nm) was estimated in rat employing specific parameters. Treatment on each alternate day for 45 days with CdSNPs (10 mg/kg b.w.) yielded significant increase in Cd-MT (cadmium metallothionein), lipid peroxidation and H2O2 generation in the kidney of rat in comparison to bulk cadmium. Concentration of creatinine also increased in urine of CdSNPs treated rats. Histopathological observations revealed extensive damage in proximal tubules...
November 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29110392/nhe3-blockade-ameliorates-type-2-diabetes-mellitus-via-inhibition-of-sglt1-mediated-glucose-absorption-in-the-small-intestine
#14
Leo K Y Chan, Yi Wang, Enders K W Ng, Po Sing Leung
AIM: Na(+) /H(+) exchanger 3 (NHE3) is an exchanger localized to the small intestinal brush border membrane (BBM). Here, we unraveled the role of NHE3 in SGLT1-mediated small intestinal BBM glucose absorption and functional implication in type 2 diabetes mellitus (T2DM). MATERIALS AND METHODS: Human jejunal samples were obtained from patients undergoing gastrectomy. (14) C-glucose absorption was measured by liquid scintillation counting. NHE3 expression was suppressed by siRNA-mediated knockdown or augmented in Caco2 cells...
November 7, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29096093/long-term-exposure-to-cadmium-pathological-effects-on-kidney-tubules-cells-in-sparus-aurata-juveniles
#15
Bice Avallone, Raimondo Cerciello, Patrizia Cretì, Carmela Pizzoleo, Rosaria Scudiero, Monica Tizzano, Raffaele Panzuto, Palma Simoniello, Maria Rosa Montinari, Chiara M Motta
The effects of an exposure to cadmium chloride 0.47μM for 150days were studied in kidneys of juveniles Sparus aurata by a multidisciplinary approach so to correlate uptake and detoxification potential to changes in brush border and glycocalyx sugar composition. Results demonstrated that cadmium concentration in kidney significantly increased from day 30 reaching a plateau on day 120 while metallothioneins reached a peak on day 90 and by day 120 were already decreasing to control values. Cytological damage was extensive on day 90, clearly detectable at both structural and ultrastructural levels, in tubular cells and brush-border...
October 28, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29093615/less-common-etiologies-of-exocrine-pancreatic-insufficiency
#16
REVIEW
Vikesh K Singh, Mark E Haupt, David E Geller, Jerry A Hall, Pedro M Quintana Diez
Exocrine pancreatic insufficiency (EPI), an important cause of maldigestion and malabsorption, results from primary pancreatic diseases or secondarily impaired exocrine pancreatic function. Besides cystic fibrosis and chronic pancreatitis, the most common etiologies of EPI, other causes of EPI include unresectable pancreatic cancer, metabolic diseases (diabetes); impaired hormonal stimulation of exocrine pancreatic secretion by cholecystokinin (CCK); celiac or inflammatory bowel disease (IBD) due to loss of intestinal brush border proteins; and gastrointestinal surgery (asynchrony between motor and secretory functions, impaired enteropancreatic feedback, and inadequate mixing of pancreatic secretions with food)...
October 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29091079/nox1-loss-of-function-genetic-variants-in-patients-with-inflammatory-bowel-disease
#17
T Schwerd, R V Bryant, S Pandey, M Capitani, L Meran, J-B Cazier, J Jung, K Mondal, M Parkes, C G Mathew, K Fiedler, D J McCarthy, P B Sullivan, A Rodrigues, S P L Travis, C Moore, J Sambrook, W H Ouwehand, D J Roberts, J Danesh, R K Russell, D C Wilson, J R Kelsen, R Cornall, L A Denson, S Kugathasan, U G Knaus, E G Serra, C A Anderson, R H Duerr, D Pb McGovern, J Cho, F Powrie, V Sw Li, A M Muise, H H Uhlig
Genetic defects that affect intestinal epithelial barrier function can present with very early-onset inflammatory bowel disease (VEOIBD). Using whole-genome sequencing, a novel hemizygous defect in NOX1 encoding NAPDH oxidase 1 was identified in a patient with ulcerative colitis-like VEOIBD. Exome screening of 1,878 pediatric patients identified further seven male inflammatory bowel disease (IBD) patients with rare NOX1 mutations. Loss-of-function was validated in p.N122H and p.T497A, and to a lesser degree in p...
November 1, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/29080975/loss-of-renal-snx5-results-in-impaired-ide-activity-and-insulin-resistance-in-mice
#18
Fengmin Li, Jian Yang, Van Anthony M Villar, Laureano D Asico, Xiaobo Ma, Ines Armando, Hironobu Sanada, Minoru Yoneda, Robin A Felder, Pedro A Jose, Xiaoyan Wang
AIMS/HYPOTHESIS: We hypothesised that renal sorting nexin 5 (SNX5) regulates the insulin-degrading enzyme (IDE) and, thus, circulating insulin levels. We therefore studied the dynamic interaction between SNX5 and IDE in human renal proximal tubule cells (hRPTCs), as well as in rat and mouse kidneys. METHODS: The regulation of IDE by SNX5 expressed in the kidney was studied in vitro and in vivo. Snx5 or mock siRNA was added to immortalised hRPTCs (passage <20) in culture or selectively infused, via osmotic mini-pump, into the remnant kidney of uninephrectomised mice and rats...
October 28, 2017: Diabetologia
https://www.readbyqxmd.com/read/29074737/ldl-receptor-related-protein-2-megalin-as-a-target-antigen-in-human-kidney-anti-brush-border-antibody-disease
#19
Christopher P Larsen, Claire Trivin-Avillach, Paige Coles, A Bernard Collins, Michael Merchant, Hong Ma, Daniel W Wilkey, Josephine M Ambruzs, Nidia C Messias, L Nicholas Cossey, Ivy A Rosales, Thomas Wooldridge, Patrick D Walker, Robert B Colvin, Jon Klein, David J Salant, Laurence H Beck
Primary renal tubulointerstitial disease resulting from proximal tubule antigen-specific antibodies and immune complex formation has not been well characterized in humans. We report a cohort of patients with a distinct, underappreciated kidney disease characterized by kidney antibrush border antibodies and renal failure (ABBA disease). We identified ten patients with ABBA disease who had a combination of proximal tubule damage, IgG-positive immune deposits in the tubular basement membrane, and circulating antibodies reactive with normal human kidney proximal tubular brush border...
October 26, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29064633/proteomics-analysis-of-trichoplusia-ni-midgut-epithelial-cell-brush-border-membrane-vesicles
#20
Muhammad Afzal Javed, Cathy Coutu, David A Theilmann, Martin A Erlandson, Dwayne D Hegedus
The insect midgut epithelium is composed of columnar, goblet and regenerative cells. Columnar epithelial cells are the most abundant and have membrane protrusions that form the brush border membrane (BBM) on their apical side. These increase surface area available for the transport of nutrients, but also provide opportunities for interaction with xenobiotics such as pathogens, toxins and host plant allelochemicals. Recent improvements in proteomic and bioinformatics tools provided an opportunity to determine the proteome of the T...
October 24, 2017: Insect Science
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