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https://www.readbyqxmd.com/read/28807932/reducing-inflammatory-cytokine-production-from-renal-collecting-duct-cells-by-inhibiting-gata2-ameliorates-acute-kidney-injury
#1
Lei Yu, Takashi Moriguchi, Hiroshi Kaneko, Makiko Hayashi, Atsushi Hasegawa, Masahiro Nezu, Hideyuki Saya, Masayuki Yamamoto, Ritsuko Shimizu
Acute kidney injury (AKI) is a leading cause of chronic kidney disease. Proximal tubules are considered to be the primary origin of pathogenic inflammatory cytokines in AKI. However, it remains unclear whether other cell types, including collecting duct (CD) cells, participate in inflammatory processes. The transcription factor GATA2 is specifically expressed in CD cells and maintains their cellular identity. To explore the pathophysiological function of GATA2 in AKI, we generated renal tubular cell-specific Gata2 deletion (G2CKO) mice and examined their susceptibility to ischemia-reperfusion injury (IRI)...
August 14, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28807339/primary-collision-tumors-of-the-kidney-composed-of-oncocytoma-and-papillary-renal-cell-carcinoma-a-review
#2
REVIEW
Zulfia McCroskey, Sue J Sim, Andrew A Selzman, Alberto G Ayala, Jae Y Ro
BACKGROUND: There are well known cases of hybrid tumors of chromophobe renal cell carcinoma (RCC) and oncocytoma in kidney, where both tumors have the same cell of origin - intercalated cell of the collecting duct. However, collision tumors composed of neoplasms originating from different cell lineages such as oncocytoma and papillary RCC are extremely rare. Herein, we made a collective literature review of reported cases of collision tumors composed of oncocytoma and papillary RCC, adding a case that we recently experienced...
August 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28798345/nedd4-family-e3-ligase-dysfunction-due-to-pkhd1-pkhd1-defects-suggests-a-mechanistic-model-for-arpkd-pathobiology
#3
Jun-Ya Kaimori, Cheng-Chao Lin, Patricia Outeda, Miguel A Garcia-Gonzalez, Luis F Menezes, Erum A Hartung, Ao Li, Guanqing Wu, Hideaki Fujita, Yasunori Sato, Yasuni Nakanuma, Satoko Yamamoto, Naotsugu Ichimaru, Shiro Takahara, Yoshitaka Isaka, Terry Watnick, Luiz F Onuchic, Lisa M Guay-Woodford, Gregory G Germino
Autosomal recessive polycystic kidney disease (ARPKD) is an important childhood nephropathy, occurring 1 in 20,000 live births. The major clinical phenotypes are expressed in the kidney with dilatation of the collecting ducts, systemic hypertension, and progressive renal insufficiency, and in the liver with biliary dysgenesis, portal tract fibrosis, and portal hypertension. The systemic hypertension has been attributed to enhanced distal sodium reabsorption in the kidney, the structural defects have been ascribed to altered cellular morphology, and fibrosis to increased TGF-β signaling in the kidney and biliary tract, respectively...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28796833/bile-microbiota-in-primary-sclerosing-cholangitis-impact-on-disease-progression-and-development-of-biliary-dysplasia
#4
Pedro Pereira, Velma Aho, Johanna Arola, Sonja Boyd, Kalle Jokelainen, Lars Paulin, Petri Auvinen, Martti Färkkilä
OBJECTIVE: The etiopathogenesis and risk for development of biliary neoplasia in primary sclerosing cholangitis (PSC) are largely unknown. Microbes or their metabolites have been suggested to play a role. To explore this potential microbial involvement, we evaluated the differences in biliary microbiota in PSC patients at an early disease stage without previous endoscopic retrograde cholangiography (ERC) examinations, advanced disease stage, and with biliary dysplasia or cholangiocarcinoma...
2017: PloS One
https://www.readbyqxmd.com/read/28794148/tubulointerstitial-nephritis-with-igm-positive-plasma-cells
#5
Naoki Takahashi, Takako Saeki, Atsushi Komatsuda, Chishio Munemura, Takeaki Fukui, Naofumi Imai, Noriyuki Homma, Tsuguru Hatta, Ken-Ichi Samejima, Takashi Fujimoto, Hiroki Omori, Yumi Ito, Yudai Nishikawa, Mamiko Kobayashi, Yukie Morikawa, Sachiko Fukushima, Seiji Yokoi, Daisuke Mikami, Kenji Kasuno, Hideki Kimura, Tomoyuki Nemoto, Yasunari Nakamoto, Kiyonao Sada, Manabu Sugai, Hironobu Naiki, Haruyoshi Yoshida, Ichiei Narita, Yoshihiko Saito, Masayuki Iwano
Infiltration by IgG-positive plasma cells is a common finding in tubulointerstitial nephritis. Indeed, it has been thought that CD138-positive mature plasma cells secrete mainly IgG, and the occurrence of tubulointerstitial nephritis with CD138-positive plasma cells secreting IgM has rarely been reported. Routine immunofluorescence of fresh frozen sections is considered the gold standard for detection of immune deposits. However, the immunoenzyme method with formalin-fixed, paraffin-embedded sections is superior for detecting IgM- or IgG-positive cells within the renal interstitium, thus histologic variants may often go undetected...
August 9, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28794066/insights-into-cellular-and-molecular-basis-for-urinary-tract-infection-in-autosomal-dominant-polycystic-kidney-disease
#6
Chao Gao, Long Zhang, Ye Zhang, Darren Paul Wallace, Reynold I Lopez-Soler, Paul J Higgins, Wenzheng Zhang
Urinary tract infection (UTI) is a broad term referring to an infection of the kidneys, ureters, bladder and/or urethra. Due to its prevalence, frequent recurrence and rising resistance to antibiotics, UTI has become a challenge in clinical practice. Autosomal dominant polycystic kidney disease (ADPKD) is the most common monogenic disorder of the kidney and is characterized by the growth of fluid-filled cysts in both kidneys. Progressive cystic enlargement, inflammation and interstitial fibrosis result in nephron loss with subsequent decline in kidney function...
August 9, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28793269/cell-type-specific-gene-programs-of-the-normal-human-nephron-define-kidney-cancer-subtypes
#7
David Lindgren, Pontus Eriksson, Krzysztof Krawczyk, Helén Nilsson, Jennifer Hansson, Srinivas Veerla, Jonas Sjölund, Mattias Höglund, Martin E Johansson, Håkan Axelson
Comprehensive transcriptome studies of cancers often rely on corresponding normal tissue samples to serve as a transcriptional reference. In this study, we performed in-depth analyses of normal kidney tissue transcriptomes from the TCGA and demonstrate that the histological variability in cellularity, inherent in the kidney architecture, lead to considerable transcriptional differences between samples. This should be considered when comparing expression profiles of normal and cancerous kidney tissues. We exploited these differences to define renal-cell-specific gene signatures and used these as a framework to analyze renal cell carcinoma (RCC) ontogeny...
August 8, 2017: Cell Reports
https://www.readbyqxmd.com/read/28791984/odontogenic-and-nonodontogenic-cysts-an-analysis-of-526-cases-in-turkey
#8
A Kilinc, B Gundogdu, N Saruhan, E Yalcin, U Ertas, G Urvasizoglu
PURPOSE: The aim of this study was to determine the age, gender, and sites of different types of odontogenic cysts (OCs) and non-OCs (nOCs) (seen in eastern Anatolian population in Turkey. MATERIALS AND METHODS: The following data were collected from the clinical records and histopathology reports of the Department of Oral and Maxillofacial Surgery and the Department of Oral Pathology, Ataturk University, Turkey, during a period of 10 years. They were analyzed descriptively in terms of incidence, age, sex, cyst type, and site...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28777373/the-mir-183-itga3-axis-is-a-key-regulator-of-prosensory-area-during-early-inner-ear-development
#9
Priscilla Van den Ackerveken, Anaïs Mounier, Aurelia Huyghe, Rosalie Sacheli, Pierre-Bernard Vanlerberghe, Marie-Laure Volvert, Laurence Delacroix, Laurent Nguyen, Brigitte Malgrange
MicroRNAs are important regulators of gene expression and are involved in cellular processes such as proliferation or differentiation, particularly during development of numerous organs including the inner ear. However, it remains unknown if miRNAs are required during the earliest stages of otocyst and cochlear duct development. Here, we report that a conditional loss of Dicer expression in the otocyst impairs the early development of the inner ear as a result of the accumulation of DNA damage that trigger p53-mediated apoptosis...
August 4, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28765894/follistatin-like-protein-1-increases-transepithelial-resistance-in-kidney-epithelial-cells-through-akt-signaling
#10
Fei Chen, Qiang Hu, Huihui Huang, Binbin Chen, Yin Xia, Wenjing Liu
Tight junctions are intercellular junctional structures that control paracellular permeability across epithelial cell sheets, and serve as a barrier to the intramembranic diffusion of components between apical and basolateral cell membrane domains. Follistatin‑like protein 1 (FSTL1) has been reported to promote cellular metabolism and survival. FSTL1 has been revealed to be highly expressed in adult kidney tissues, and high FSTL1 levels have been reported in mouse and human serum samples; however, the roles of FSTL1 in the regulation of kidney function remain to be elucidated...
July 31, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28754689/direct-interaction-of-ezrin-and-aqp2-and-its-role-in-aqp2-trafficking
#11
Wei Li, William W Jin, Kenji Tsuji, Ying Chen, Naohiro Nomura, Limin Su, Naofumi Yui, Julian Arthur, Susanna Cotecchia, Teodor G Păunescu, Dennis Brown, Hua A J Lu
The water channel aquaporin-2 (AQP2) is a major regulator of water homeostasis in response to vasopressin (VP). Dynamic trafficking of AQP2 relies on its close interaction with trafficking machinery proteins and the actin cytoskeleton. Here, we report the identification of ezrin, an actin binding protein from the ezrin/radixin/moesin (ERM) family as an AQP2 interacting protein. Ezrin was first detected in a co-immunoprecipitation (co-IP) complex using an anti-AQP2 antibody by proteomic analysis. Immunofluorescence staining revealed the co-expression of ezrin and AQP2 in collecting duct principal cells, and VP treatment caused redistribution of both proteins to the apical membrane...
July 28, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28750036/generation-and-phenotypic-characterization-of-pde1a-mutant-mice
#12
Xiaofang Wang, Satsuki Yamada, Wells B LaRiviere, Hong Ye, Jason L Bakeberg, María V Irazabal, Fouad T Chebib, Jan van Deursen, Peter C Harris, Caroline R Sussman, Atta Behfar, Christopher J Ward, Vicente E Torres
It has been proposed that a reduction in intracellular calcium causes an increase in intracellular cAMP and PKA activity through stimulation of calcium inhibitable adenylyl cyclase 6 and inhibition of phosphodiesterase 1 (PDE1), the main enzymes generating and degrading cAMP in the distal nephron and collecting duct, thus contributing to the development and progression of autosomal dominant polycystic kidney disease (ADPKD). In zebrafish pde1a depletion aggravates and overexpression ameliorates the cystic phenotype...
2017: PloS One
https://www.readbyqxmd.com/read/28749169/effects-of-sodium-glucose-cotransporter-2-inhibitors-on-serum-uric-acid-in-type-2-diabetes-mellitus
#13
Hala Ahmadieh, Sami Azar
Hyperuricemia has been linked to metabolic syndrome, cardiovascular disease, and chronic kidney disease. Hyperuricemia and type 2 diabetes mellitus were inter-related, type 2 diabetes mellitus was more at risk of having a higher serum uric acid level, and also individuals with higher serum uric acid had higher risk of developing type 2 diabetes in the future. Insulin resistance seems to play an important role in the causal relationship between metabolic syndrome, type 2 diabetes, and hyperuricemia. Oral diabetic drugs that would have additional beneficial effects on reducing serum uric acid levels are of importance...
July 27, 2017: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/28748913/d-chiro-inositol-effectively-attenuates-cholestasis-in-bile-duct-ligated-rats-by-improving-bile-acid-secretion-and-attenuating-oxidative-stress
#14
Shuang-Shuang Zhao, Na-Ren Li, Wu-Li Zhao, Hong Liu, Mao-Xu Ge, Yi-Xuan Zhang, Long-Yin Zhao, Xue-Fu You, Hong-Wei He, Rong-Guang Shao
Cholestatic liver diseases are important causes of liver cirrhosis and liver transplantation, but few drugs are available for treatment. D-chiro-inositol (DCI), an isomer of inositol found in many Leguminosae plants and in animal viscera, is used clinically for the treatment of polycystic ovary syndrome (PCOS) and diabetes mellitus. In this study, we investigated whether DCI exerted an anti-cholestatic effect and its underlying mechanisms. A cholestatic rat model was established via bile duct ligation (BDL)...
July 27, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28747361/metabolic-acidosis-stimulates-the-production-of-the-antimicrobial-peptide-cathelicidin-in-rabbit-urine
#15
Hu Peng, Jeffrey M Purkerson, Andrew L Schwaderer, George J Schwartz
Intercalated cells of the collecting duct (CD) are critical for acid-base homeostasis and innate immune defense of the kidney. Little is known about the impact of acidosis on innate immune defense in the distal nephron. Urinary tract infections are mainly due to Escherichia coli and are an important risk factor for development of chronic kidney disease. While the effect of urinary pH on growth of E. coli is well established, in this study we demonstrate that acidosis increases urine antimicrobial activity due, at least in part, to induction of cathelicidin expression within the CD...
July 26, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28746453/occurrence-of-paratanaisia-confusa-freitas-1951-in-free-living-guira-cuckoo-guira-guira-cuculiformes-crotophagidae
#16
Mariele de Santi, Marcos Rogério André, Estevam Guilherme Lux Hoppe, Karin Werther
This report presents a description of natural infection of an adult free-living guira cuckoo with Paratanaisia confusa. Histological and morphological evaluations of renal and parasite samples were performed. The morphological analysis of the parasites revealed spiny tegument, characteristic of P. confusa helminthes. Although macroscopic alterations were absent in the kidneys, the histopathology revealed parasites inside the collecting ducts causing dilatation and destruction of the lining epithelial cells in addition to small focal inflammatory infiltrates in the renal parenchyma...
April 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28740964/isolated-chylous-injury-due-to-blunt-abdominal-trauma-report-of-a-case-and-a-review-of-the-literature
#17
Tunç Eren, Mustafa Demir, Süleyman Orman, Metin Leblebici, İbrahim Ali Özemir, Orhan Alimoğlu
The chyle duct (CD) lies close to the spine behind the right renal vein and vena cava. Forces capable of tearing the CD may also injure other adjacent structures or organs. Cases of isolated chylous injury are rarely reported in the literature. Our aim was to report a case of isolated chylous injury due to blunt abdominal trauma that was successfully treated non-operatively. A 54-year-old man was involved in a deceleration-type traffic accident. His physical examinations, radiologic evaluations, paracentesis, and laboratory findings revealed isolated chylous injury resulting from intra- and retroperitoneal chylous fluid collection...
2017: Turk J Surg
https://www.readbyqxmd.com/read/28739282/long-term-risk-of-pancreatic-malignancy-in-patients-with-branch-duct-intraductal-papillary-mucinous-neoplasm-in-a-referral-center
#18
Ilaria Pergolini, Klaus Sahora, Cristina R Ferrone, Vicente Morales-Oyarvide, Brian M Wolpin, Lorelei A Mucci, William R Brugge, Mari Mino-Kenudson, Manuel Patino, Dushyant V Sahani, Andrew L Warshaw, Keith D Lillemoe, Carlos Fernández-Del Castillo
BACKGROUND & AIMS: Little is known about development of branch duct intraductal papillary mucinous neoplasms (BD-IPMNs). We evaluated long-term outcomes of a large cohort of patients with BD-IPMNs to determine risk of malignancy and define a subset of low-risk BD-IPMNs. METHODS: We performed a retrospective analysis of data from 577 patients with suspected or presumed BD-IPMN under surveillance at the Massachusetts General Hospital. Patients underwent cross-sectional imaging analysis at 3 months or later after their initial diagnosis...
July 21, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28739154/prostaglandin-e2-a-pancreatic-fluid-biomarker-of-intraductal-papillary-mucinous-neoplasm-dysplasia
#19
Michele T Yip-Schneider, Rosalie A Carr, Huangbing Wu, C Max Schmidt
BACKGROUND: With the increased frequency of diagnostic imaging, pancreatic cysts are now detected in >3% of American adults. Most of these are intraductal papillary mucinous neoplasm (IPMN) with well-established but variable malignant potential. A biomarker that predicts malignant potential or dysplastic grade would help determine which IPMN require removal or can be safely observed. We previously reported that pancreatic fluid prostaglandin E2 (PGE2) levels may have promise as a predictor of IPMN dysplasia and seek to validate these results in the current study...
July 21, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28737271/in-vitro-fertilization-and-pregnancy-management-in-a-woman-with-acquired-idiopathic-chylous-ascites
#20
Ai Sakamoto, Yasuhiko Kamada, Sayoko Kotani, Kiyoshi Yamada, Yoshihiro Kimata, Yuji Hiramatsu
Acquired idiopathic chylous ascites is extremely rare in women of reproductive age. This is the first report describing successful infertility and pregnancy management in a patient with idiopathic chylous ascites. A 23-year-old woman presented with abdominal distention and was diagnosed with idiopathic fluid collection. A lymphogram revealed lymphatic leakage from the right renal hilum. Lymphatic-venous anastomosis of the thoracic duct was performed thrice, but the chylous ascites persisted. In vitro fertilization was performed because natural conception was not possible...
July 24, 2017: Journal of Obstetrics and Gynaecology Research
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