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NDI Terminology - kidney collecting duct cells   (Site not responding. Last check: 2007-10-18) Kidney collecting duct cells are cells which are mainly located in the medulla of the kidney. Collecting duct cells are at the end of such nephrons. Reabsorption of water in collecting duct cells is regulated by the V2 vasopressin receptor. www.ndif.org /Terms/kidney_collecting_duct_cells.html   (98 words)

CCMS Home Page Vasopressin-elicited water and urea permeabilities are altered in the innermedullary collecting duct in hypercalcemic rats. Active sodium-urea counter-transport is inducible in the baso-lateral membrane of rat renal initial inner medullary collecting ducts. Vasopressin-elicited water and urea permeabilities are altered in the inner medullary collecting duct in hypercalcemic rats. www.med.emory.edu /CCMS/jeff.htm   (1035 words)

collecting tubule (collecting duct)   (Site not responding. Last check: 2007-10-18) Absence of small conductance K+ channel (SK) activity in apical membranes of thick ascending limb and cortical collecting duct in ROMK (Bartter's) knockout mice. PGE2 synthesis in cultured renal papillary collecting tubule cells from young and aged spontaneously hypertensive rats. Close association of urinary excretion of aquaporin-2 with appropriate and inappropriate arginine vasopressin-dependent antidiuresis in hyponatremia in elderly subjects. www.arclab.org /node_pages/253.html   (129 words)

University of Utah Department of Internal Medicine In renal physiology, his research interests are cellular and molecular mechanisms of vasopressin-independent regulation of renal medullary collecting duct water transport, with particular emphasis on the role of purinergic mechanisms, and the interaction of purinergic and prostanoid systems in medullary collecting duct. Collecting duct endothelin-1 knockout mice are hypertensive and have impaired ability to excrete a sodium or water load. The epithelial Ets factors may be important in the differentiation and maturation of the collecting duct, and also potentially in diseases of the collecting duct. www.int.med.utah.edu /neph/research.html   (5324 words)

USCAP 2002 Annual Meeting Collecting duct carcinomas (synonym: carcinoma of the ducts of Bellini) are usually large tumors located in the medulla or central parts of the kidney with extension into the perinephric fat and invasion of the renal pelvis. Light microscopically, the basic cell type of collecting duct carcinoma is medium sized tumor cells with a basophilic, sometimes light cytoplasm due to a pronounced formation of endoplasmic reticulum and varying degrees of glycogen deposits often forming typical hobnail cells. Electron microscopically, the lateral and basal cell membranes are orientated linearly without interdigitations and invaginations resembling those of the principal cells of the medullary collecting duct. www.uscap.org /site~/91st/duct.htm   (239 words)

Distal renal tubular acidosis in mice that lack the forkhead transcription factor Foxi1 -- Blomqvist et al. 113 (11): ... AE4 is a DIDS-sensitive Cl(-)/HCO(-)(3) exchanger in the basolateral membrane of the renal CCD and the SMG duct. LeFurgey, A., and Tisher, C.C. Morphology of rabbit collecting duct. Absence of H(+)-ATPase in cortical collecting tubules of a patient with Sjogren’s syndrome and distal renal tubular acidosis. www.jci.org /cgi/content/full/113/11/1560   (6901 words)

BioMed Central | Full text | Collecting duct carcinoma of the kidney: an immunohistochemical study of 11 cases Collecting duct carcinoma (CDC) is a rare but very aggressive variant of kidney carcinoma that arises from the epithelium of Bellini's ducts, in the distal portion of the nephron. Recent evidence suggests that solid renal parenchymal tumors arising in the distal portion of the nephron, such as oncocytomas, chromophobe renal cell carcinomas and collecting duct carcinomas represent an heterogeneous group of neoplasm from both clinical and biological perspectives [2]. Collecting duct carcinoma (CDC), also known as Bellini duct carcinoma, is a rare but highly aggressive renal neoplasm arising from the distal portion of the nephron, and represents approximately 2% of all the RCCs [3,4]. www.biomedcentral.com /1471-2490/4/11   (4243 words)

C. Craig Tisher, M.D. The kidney is a major organ involved in the maintenance of acid-base homeostasis in most mammals including man. The proximal and distal nephron and the collecting duct possess major sites for proton and bicarbonate transport that are critical to the acid-base regulatory process. Response of intercalated cells of rat outer medullary collecting duct to chronic metabolic acidosis. Cellular response to acute respiratory acidosis in rat medullary collecting duct. www.med.ufl.edu /anatomy/tisher.html   (188 words)

Collecting Duct Carcinoma of the Kidney: Are Imaging Findings Suggestive of the Diagnosis? -- Pickhardt et al. 176 (3): ... Collecting duct carcinoma is an aggressive malignancy derived Grossly, collecting duct carcinoma tends to be large at presentation. Collecting duct carcinoma of the kidney: a report of three cases and review of the literature. www.ajronline.org /cgi/content/full/176/3/627   (3628 words)

Escape from vasopressin-induced antidiuresis: role of vasopressin resistance of the collecting duct -- Ecelbarger et ... Aquaporin-2 is the principal water channel of the apical plasma membrane of kidney collecting duct principal cells. Collecting ducts were dissected from the mid-portion of the inner medulla and were Vasopressin increases water permeability of kidney collecting duct by inducing translocation of aquaporin-CD water channels to plasma membrane. ajprenal.physiology.org /cgi/content/full/274/6/F1161   (3582 words)

E46 M3 cooling ducts   (Site not responding. Last check: 2007-10-18) This can be done without removing the driver's side duct, but you can remove the driver's side duct in a manner similar to the method for removing the passenger's side duct with 2 exceptions. Caution: make the amount of hose that is inserted into the duct short enough to prevent obstructing airflow into the vertical engine air intake (but long enough so the hose stays in the duct). A collecting duct for the for the hose on passenger's side duct can be installed to force all the air entering this duct into the hose. home.comcast.net /~biodan/cooling.html   (2553 words)

DuctMonkey - That means you don’t have to throw away your existing ducting each time you make a floor plan change. When the EZfit clamp (complete with built-in gasket) is snapped into place, the resulting seal is strong and tight enough for almost all dust collection and solid materials conveying applications. A partial listing of material collected or conveyed through EZfit includes: sawdust, metal grindings, printing powder, plastic pellets, dry concrete, carbon fl, smoke, fumes, grains, line, wood chips, mists, toner dusts, paper trim, cocoa, and hundreds of others. www.ductmonkey.net   (260 words)

Untitled Document   (Site not responding. Last check: 2007-10-18) But the roles of membrane transporters and channels that are involved in the vectorial transport of solutes and water along the nephron and collecting duct, and the receptors and the associated regulatory proteins and intracellular signaling pathways that control their functions are yet to be deciphered. Often these transporters and receptors are expressed in nephron or collecting duct segments that are not directly affected by the insults (ischemia or drugs) that lead to the ARF. However, the factors responsible for the decreased expression of the collecting duct aquaporins and the lack of their responsiveness to ADH are yet to be deciphered. telpath2.med.utah.edu /medresearch/abstracts/kishore.htm   (841 words)

NDI Terminology - duct   (Site not responding. Last check: 2007-10-18) A passage with well-defined walls, especially a tube for the passage of excretions or secretions. collecting duct - Renal collecting tubule: the arcuate renal tubule, straight collecting tubule, and papillary duct considered together. papillary duct - A wide terminal tubule in the renal pyramid, formed by the union of several straight collecting tubules and emptying into the renal pelvis in the area cribrosa. www.ndif.org /Terms/duct.html   (63 words)

Molecular, Cellular and Systems Physiology at Dartmouth | Géza Fejes-Tóth The main goal of a second project is to understand at the cellular and molecular level the mechanisms by which the renal collecting duct adapts to changes in acid/base balance. Sgk is an aldosterone-induced kinase in the renal collecting duct: effects on epithelial Na channels. Regulation of sodium transport in mammalian collecting duct cells by aldosterone-induced kinase, SGK1: Structure/function studies. www.dartmouth.edu /~physiol/faculty/g.fejes-toth.html   (594 words)

A mathematical model of the inner medullary collecting duct of the rat: pathways for Na and K transport -- Weinstein ... A mathematical model of the inner medullary collecting duct of the rat: pathways for Na and K transport Sodium reabsorption in the papillary collecting duct of rats. Bicarbonate reabsorption in the papillary collecting duct of rats. ajprenal.physiology.org /cgi/content/full/274/5/F841   (6097 words)

Schafer Research Details Fourth, we have employed cell culture techniques with the A6 cell line and primary cultures of rabbit cortical collecting duct cells in an attempt to determine the regulatory mechanism which appears to prevent an effect of vasopressin on Na+ transport in the native rabbit cortical collecting duct. In particular, we have found that after growth in primary culture cortical collecting duct cells that are immuno-dissected from the rabbit renal cortex are no longer refractory to the stimulatory effects of vasopressin, but exhibit a sustained increase in Na+ transport when the hormone is added. We are presently conducting studies with isolated perfused cortical collecting ducts from Dahl salt-sensitive rats to determine whether the same or different hormonal regulatory mechanisms are present as in the salt-resistant rat, and in the normal Sprague-Dawley rats that we have been using in other studies. www.physiology.uab.edu /SchaferLab/labdetail.html   (1646 words)

Basolateral proteinase-activated receptor (PAR-2) induces chloride secretion in M-1 mouse renal cortical collecting ... However, collecting duct, which is responsible for the fine tuning of renal water and electrolyte handling, is a likely target for protease action. The appropriate regulation of the corresponding transport mechanisms is of pivotal importance for the maintenance of overall water and electrolyte balance of the body. Schlatter, E., Greger, R. and Schafer, J. Principal cells of cortical collecting ducts of the rat are not a route of transepithelial Cl transport. jp.physoc.org /cgi/content/full/521/1/3   (9339 words)

Candidate Genes in the Regulation of Na+ Transport by Inner Medullary Collecting Duct Cells From Dahl Rats -- Husted et ...   (Site not responding. Last check: 2007-10-18) Nitric oxide inhibits sodium reabsorption in the isolated perfused cortical collecting duct. Anion secretion by the inner medullary collecting duct: evidence for involvement of the cystic fibrosis transmembrane conductance regulator. ANF inhibits NaCl and fluid absorption in cortical collecting duct of rat kidney. hyper.ahajournals.org /cgi/content/full/31/2/608   (4174 words)

H+-K+-ATPases: regulation and role in pathophysiological states -- Silver and Soleimani 276 (6): 799 -- AJP - Renal ... Regulation of collecting tubule adenosine triphosphates by aldosterone and potassium. H-K-ATPase immunoreactivity in cortical and outer medullary collecting duct. Mechanisms of rubidium permeation by rabbit cortical collecting duct during potassium restriction. ajprenal.physiology.org /cgi/content/full/276/6/F799   (5919 words)

Digital Atlas of Fathead Minnow Histology: SENSORY ORGANS - RENAL The initial collecting duct (6) is larger in diameter than the preceding distal segment. Subsequent collecting tubule segments increase in diameter with their epithelium becoming pseudostratified and possessing goblet cells. Rodlet cells and intercalated cells (wandering leukocytes) are common within the collecting duct epithelium. aquaticpath.umd.edu /fhm/renal.html   (515 words)

Plasticity of mouse renal collecting duct in response to potassium depletion -- Cheval et al. 19 (1): 61 -- ... Plasticity of mouse renal collecting duct in response to potassium depletion -- Cheval et al. intake of potassium induce pleiotropic adaptations of collecting pleiotropic adaptation of the outer medullary collecting duct physiolgenomics.physiology.org /cgi/content/abstract/19/1/61   (315 words)

CD (collecting duct) - General Practice Notebook   (Site not responding. Last check: 2007-10-18) In the absence of antidiuretic hormone (ADH or vasopressin), the collecting duct is an impermeable tubule which conveys hypotonic fluid from the distal convoluted tubule to the renal pelvis. ADH causes the CD to become permeable to water, allowing concentration of the urine as the fluid passes through the hypertonic renal medulla. In the absence of ADH, the collecting duct is impermeable to water and the hypotonic fluid from the distal tubule passes out unaltered as urine. www.gpnotebook.co.uk /cache/959774745.htm   (144 words)

Collecting Duct Carcinoma | Webpathology.cfm   (Site not responding. Last check: 2007-10-18) Remarks: This rare renal tumor shows differentiation towards medullary collecting tubules. Remarks: The tumor cells are arranged in duct-like structures, irregular nests or infiltrate singly. Hobnail appearance, seen clearly in this duct, is a helpful diagnostic feature. www.webpathology.com /case.cfm?case=69   (59 words)

Study Sheds Light On Why Diabetes Drug Causes Edema Using knockout-gene technology, the U of U School of Medicine researchers found that when TZD is activating a nuclear receptor, the peroxisome proliferator-activated receptor gamma, in the collecting duct in the kidney, it serves as a mechanism for fluid retention, or edema. The researchers suggest that the distal nephron, for example the collecting duct, is crucial for regulation of sodium balance and blood pressure. In the kidney, PPAR is found in the collecting duct, a critical site for the control of fluid metabolism. www.sciencedaily.com /releases/2005/06/050619081825.htm   (736 words)

[No title] Water is drawn out of the ducts by the high levels of solutes in the interstitial fluid of the inner medulla region. It can't go out of the tubule after that (not out the ascending loop, not out the DCT, not even out of the part of the collecting duct that is up in the cortical region) the walls are impermeable to urea. This high concentration of urea in the duct causes some urea to diffuse out of the lower end of the collecting duct, deep in the renal medulla, where some of it will diffuse into descending loop of Henle. www.olemiss.edu /courses/bisc207/urine2.html   (1363 words)

PAX2 Suppresses Apoptosis in Renal Collecting Duct Cells -- Torban et al. 157 (3): 833 -- American Journal of Pathology in the branching collecting ducts, we analyzed embryos from E15 kidneys, PCNA staining was intense in the collecting ducts study, in that it was the collecting duct that underwent apoptosis ajp.amjpathol.org /cgi/content/full/157/3/833   (4914 words)

Collecting Duct Database:Table of Contents This database is intended to serve as a learning tool to obtain curated information for the design of microarray targets to scan collecting duct tissues (human, rat, mouse). The database focuses on regulatory and transporter proteins expressed in the collecting duct, but when collecting duct proteins are a member of a larger family of proteins, common additional members of the family are included even if they have not been demonstrated to be expressed in the collecting duct. Database for Renal Collecting Duct Regulatory and Transporter Proteins, Physiol. cddb.nhlbi.nih.gov /cddb   (224 words)

372-S01-Handout#23.html   (Site not responding. Last check: 2007-10-18) Pronephric duct induces the adjacent mesenchyme cells to become pronephric tubules. Wolfian duct and mesonephric tubule will become part of the male reproductive system. a) collecting duct arise as an outgrowth from the mesonephric dust www.sonoma.edu /biology/pillai/Biology372/372-s-04-handout-21.html   (268 words)

Changes in cellular composition of kidney collecting duct cells in rats with lithium-induced NDI -- Christensen et al. ... In multiple collecting duct cells there was no AQP-2 labeling, which indicates that the density of AQP-2-positive cells decreases after lithium treatment. Kidney collecting ducts are composed of principal and intercalated Intercalated cell subtypes in connecting tubule and cortical collecting duct of rat and mouse. ajpcell.physiology.org /cgi/content/full/286/4/C952   (7428 words)

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