keyword
MENU ▼
Read by QxMD icon Read
search

Renal medulla

keyword
https://www.readbyqxmd.com/read/29143363/utility-of-shear-wave-elastography-for-assessing-allograft-fibrosis-in-renal-transplant-recipients-a-pilot-study
#1
Heather M Early, Ellen C Cheang, Jorge M Aguilera, Jonah S W Hirschbein, Ghaneh Fananapazir, Machelle D Wilson, John P McGahan
OBJECTIVES: To evaluate the utility of ultrasound-based shear wave elastography (SWE) as a noninvasive method to accurately detect and potentially stage the severity of renal allograft fibrosis and assess its user reproducibility. METHODS: In this Institutional Review Board-approved, Health Insurance Portability and Accountability Act-compliant prospective study, 70 renal transplant recipients underwent an SWE evaluation of their allograft followed directly by biopsy...
November 16, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29141937/novel-differences-in-renal-gene-expression-in-a-diet-induced-obesity-model
#2
Victoria L Halperin Kuhns, Jennifer L Pluznick
Obesity is a significant risk factor for both chronic kidney disease and end stage renal disease. To better understand disease development, we sought to identify novel genes differentially expressed early in disease progression. We first confirmed that mice fed a high-fat (HF) diet exhibit early signs of renal injury including hyperfiltration. We then performed RNA Seq using renal cortex RNA from C57Bl/6 male mice fed either HF or control (Ctrl) diet. We identified 1134 genes differentially expressed in the cortex on HF versus Ctrl, of which 31 genes were selected for follow up analysis...
November 15, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29137154/two-sulfur-glycoside-compounds-isolated-from-lepidium-apetalum-willd-protect-nrk52e-cells-against-hypertonic-induced-adhesion-and-inflammation-by-suppressing-the-mapk-signaling-pathway-and-raas
#3
Peipei Yuan, Xiaoke Zheng, Meng Li, Yingying Ke, Yang Fu, Qi Zhang, Xiaolan Wang, Weisheng Feng
Lepidium apetalum Willd has been used to reduce edema and promote urination. Cis-desulfoglucotropaeolin (cis-DG) and trans-desulfoglucotropaeolin (trans-DG) were isolated from Lepidium apetalum Willd, and caused a significant increase in cell viability in a hypertonic model in NRK52e cells. In the hypertonic model, cis-DG and trans-DG significantly promoted the cell viability of NRK52e cells and inhibited the elevation of Na⁺ in the supernatant, inhibited the renin-angiotensin-aldosterone (RAAS) system, significantly reduced the levels of angiotensin II (Ang II) and aldosterone (ALD), and lowered aquaporin-2 (AQP2) and Na⁺-K⁺ ATP content in renal medulla...
November 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29127739/renal-haemodynamics-and-oxygenation-during-and-after-cardiac-surgery-and-cardiopulmonary-bypass
#4
REVIEW
Roger G Evans, Yugeesh R Lankadeva, Andrew D Cochrane, Bruno Marino, Naoya Iguchi, Michael Z L Zhu, Sally G Hood, Julian A Smith, Rinaldo Bellomo, Bruce S Gardiner, Chang-Joon Lee, David W Smith, Clive N May
Acute kidney injury (AKI) is a common complication following cardiac surgery performed on cardiopulmonary bypass (CPB) and has important implications for prognosis. The aetiology of cardiac surgery-associated AKI is complex, but renal hypoxia, particularly in the medulla, is thought to play at least some role. There is strong evidence from studies in experimental animals, clinical observations and computational models, that medullary ischaemia and hypoxia occurs during CPB. There are no validated methods to monitor or improve renal oxygenation during CPB, and thus possibly decrease the risk of AKI...
November 11, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29125633/usability-of-functional-mri-in-clinical-studies-for-fast-and-reliable-assessment-of-renal-perfusion-and-quantification-of-hemodynamic-effects-on-the-kidney
#5
Tobias Getzin, Marcus May, Martina Schmidbauer, Marcel Gutberlet, Petros Martirosian, Reinhard Oertel, Frank Wacker, Christoph Schindler, Katja Hueper
The purpose of this study was to evaluate contrast-media-free arterial spin labeling, a technique of functional magnetic resonance imaging (MRI), for assessment of kidney perfusion in a clinical study. We examined renal perfusion by arterial spin labeling in 15 healthy adults using a clinical 1.5-T MRI system, twice under baseline conditions and 60 minutes after a single oral dose of 50 mg captopril. Data evaluation included assessment of interstudy and interrater reproducibility in addition to the pharmacological effect of captopril on kidney perfusion and a sample size calculation for potential application of the technique in pharmacological intervention studies...
November 10, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29110052/contrast-enhanced-ultrasonography-for-assessment-of-tubular-atrophy-interstitial-fibrosis-in-immunoglobulin-a-nephropathy-a-preliminary-clinical-study
#6
Wenqi Yang, Shan Mou, Yao Xu, Jing Du, Li Xu, Fenghua Li, Hongli Li
PURPOSE: To investigate the potential of contrast-enhanced ultrasonography (CEUS) for evaluating the severity of tubular atrophy/interstitial fibrosis (TA/IF) in immunoglobulin A nephropathy (IgAN) patients. MATERIALS AND METHODS: A total of 80 patients with IgAN and 33 healthy adults were investigated. Patients were divided into three groups according to the TA/IF (T) grade of the Oxford classification: T0 (n = 28), T1 (n = 35), and T2 (n = 17). Patients and control subjects underwent conventional ultrasound (US) and CEUS...
November 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29104159/physiological-and-pathophysiological-implications-of-pge2-and-the-pge2-synthases-in-the-kidney
#7
REVIEW
Jing Wang, Min Liu, Xiaoyan Zhang, Guangrui Yang, Lihong Chen
Prostaglandin E2 (PGE2) is the most abundant prostanoid synthesized in the kidney and plays an important role in renal function. Physiologically, PGE2 regulates renal hemodynamics, water and sodium metabolism, blood pressure, and so on. As a well-known proinflammatory lipid mediator, PGE2 also substantially mediates renal injury under many pathophysiological conditions. Multiple enzymes are involved in renal PGE2 biosynthesis, including the three main PGE2 terminal synthases, i.e. microsomal PGE2 synthase-1 (mPGES-1), mPGES-2 and cytosolic PGE2 synthase (cPGES)...
November 2, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29098089/the-cardiovascular-effect-of-systemic-homocysteine-is-associated-with-oxidative-stress-in-the-rostral-ventrolateral-medulla
#8
Mei-Fang Zhong, Yu-Hong Zhao, Hua Xu, Xing Tan, Yang-Kai Wang, Wei-Zhong Wang
It has been demonstrated that homocysteine (HCY) is a significant risk factor of hypertension, which is characterized by overactivity of sympathetic tone. Excessive oxidative stress in the rostral ventrolateral medulla (RVLM), a key region for control of sympathetic outflow, contributes to sympathetic hyperactivity in hypertension. Therefore, the goal of the present study is to determine the effect of systemic HCY on production of reactive oxygen species (ROS) in the RVLM. In the rat model of the diet-induced hyperhomocysteinemia (L-methionine, 1 g/kg/day, 8 weeks), we found that the HCY resulted in a significant increase (≈3...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/29097777/low-dose-nitrite-improves-reoxygenation-following-renal-ischemia-in-rats
#9
Kathleen Cantow, Bert Flemming, Mechthild Ladwig-Wiegard, Pontus B Persson, Erdmann Seeliger
In hypoxic and acidic tissue environments, nitrite is metabolised to nitric oxide, thus, bringing about novel therapeutic options in myocardial infarction, peripheral artery disease, stroke, and hypertension. Following renal ischemia, reperfusion of the kidney remains incomplete and tissue oxygenation is reduced for several minutes to hours. Thus, in renal ischemia-reperfusion injury, providing nitrite may have outstanding therapeutic value. Here we demonstrate nitrite's distinct potential to rapidly restore tissue oxygenation in the renal cortex and medulla after 45 minutes of complete unilateral kidney ischemia in the rat...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29080216/c1-neurons-a-nodal-point-for-stress
#10
Ruth L Stornetta, Patrice G Guyenet
The C1 cells are catecholaminergic and glutamatergic neurons located in the rostral ventrolateral medulla (RVLM). Collectively, these neurons innervate sympathetic and parasympathetic preganglionic neurons, the hypothalamic paraventricular nucleus, and countless brain structures involved in autonomic regulation, arousal and stress. Optogenetic inhibition of rostral C1 neurons has little effect on BP at rest in conscious rats but produces large BP drops when the animals are anesthetized or exposed to hypoxia...
October 27, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29077618/urinary-oxygenation-as-a-surrogate-measure-of-medullary-oxygenation-during-angiotensin-ii-therapy-in-septic-acute-kidney-injury
#11
Yugeesh R Lankadeva, Junko Kosaka, Roger G Evans, Rinaldo Bellomo, Clive N May
OBJECTIVES: Angiotensin II is an emerging therapy for septic acute kidney injury, but it is unknown if its vasoconstrictor action induces renal hypoxia. We therefore examined the effects of angiotensin II on intrarenal PO2 in ovine sepsis. We also assessed the validity of urinary PO2 as a surrogate measure of medullary PO2. DESIGN: Interventional study. SETTING: Research Institute. SUBJECTS: Sixteen adult Merino ewes (n = 8/group)...
October 26, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/29071436/measurement-and-scan-reproducibility-of-parameters-of-intravoxel-incoherent-motion-in-renal-tumor-and-normal-renal-parenchyma-a-preliminary-research-at-3-0%C3%A2-t-mr
#12
Jingjing Pan, Hongtao Zhang, Fengyuan Man, Yanguang Shen, Yingwei Wang, Yan Zhong, Lu Ma, Haiyi Wang, Huiyi Ye
PURPOSE: To prospectively estimate measurement and scan reproducibility of parameters of intravoxel incoherent motion (IVIM) in renal tumors, normal renal cortex, and medulla. METHODS: Twenty-four consecutive patients (twelve males and twelve females; median age 56.7 years, range 32-71 years) with 25 renal tumors (20 renal cell carcinomas, one urothelium carcinoma, three angiomyolipomas, and one oncocytoma) were examined twice using IVIM1 and IVIM2 with 9 and 16 b values, respectively, at 3...
October 25, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29063424/assessing-renal-changes-after-remote-ischemic-preconditioning-ripc-of-the-upper-extremity-using-bold-imaging-at-3t
#13
Florian Siedek, Thorsten Persigehl, Roman-Ulrich Mueller, Volker Burst, Thomas Benzing, David Maintz, Stefan Haneder
OBJECTIVE: Acute kidney injury (AKI) is an important risk factor for a number of adverse outcomes including end-stage renal disease and cardiovascular morbidity and mortality. Whilst many clinical situations that can induce AKI are known-e.g. drug toxicity, contrast agent exposure or ischemia during surgery-targeted preventive or therapeutic measures are still lacking. As to renoprotective strategies, remote ischemic preconditioning (RIPC) is one of the most promising novel approaches and has been examined by a number of clinical trials...
October 23, 2017: Magma
https://www.readbyqxmd.com/read/29055617/qualitative-and-quantitative-radiological-analysis-of-non-contrast-ct-is-a-strong-indicator-in-patients-with-acute-pyelonephritis
#14
Fadi El-Merhi, May Mohamad, Ali Haydar, Lena Naffa, Rami Nasr, Nadine Hamieh, Ziad Tayara, Charbel Saade
OBJECTIVE: To evaluate the performance of non-contrast computed tomography (CT) by reporting the difference in attenuation between normal and inflamed renal parenchyma in patients clinically diagnosed with acute pyelonephritis (APN). MATERIAL AND METHODS: This is a retrospective study concerned with non-contrast CT evaluation of 74 patients, admitted with a clinical diagnosis of APN and failed to respond to 48h antibiotics treatment. Mean attenuation values in Hounsfield units (HU) were measured in the upper, middle and lower segments of the inflamed and the normal kidney of the same patient...
September 18, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29032657/optimization-of-scan-delay-for-multi-phase-computed-tomography-using-bolus-tracking-technique-in-normal-canine-kidney
#15
Hyun Cho, DaHae Lee, AhYoung Cha, DongEun Kim, DongWoo Chang, Jihye Choi
This study was performed to optimize scan delays for the kidney using a bolus-tracking technique. In six beagle dogs, CT scan of the kidney were performed three times in each dog with different scan delays after bolus tracking triggered at 100 Hounsfield of aortic enhancement; 5, 20, 35, and 50 sec for the first scan, 10, 25, 40, and 55 sec for the second scan, and 15, 30, 45, and 60 sec for the third scan. The renal artery-to-vein contrast difference peaked at 5 sec and the renal cortex-to-medulla contrast difference reached a peak at 10 sec...
October 13, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/29031027/evaluation-of-renal-perfusion-in-hyperthyroid-cats-before-and-after-radioiodine-treatment
#16
E Stock, S Daminet, D Paepe, E Buresova, E Vandermeulen, P Smets, L Duchateau, J H Saunders, K Vanderperren
BACKGROUND: Hyperthyroidism and chronic kidney disease (CKD) are common in elderly cats. Consequently, both diseases often occur concurrently. Furthermore, renal function is affected by thyroid status. Because changes in renal perfusion play an important role in functional renal changes in hyperthyroid cats, investigation of renal perfusion may provide novel insights. OBJECTIVES: To evaluate renal perfusion in hyperthyroid cats with contrast-enhanced ultrasound (CEUS)...
October 14, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29027577/assessment-of-renal-perfusion-impairment-in-a-rat-model-of-acute-renal-congestion-using-contrast-enhanced-ultrasonography
#17
Kaoru Komuro, Yoshihiro Seo, Masayoshi Yamamoto, Seika Sai, Tomoko Ishizu, Kyo Shimazu, Yumi Takahashi, Shogo Imagawa, Teisuke Anzai, Kazuya Yonezawa, Kazutaka Aonuma
Renal congestion is caused by elevated central venous pressure (CVP), and decreases glomerular filtration in patients with congestive heart failure. Since real-time contrast-enhanced ultrasonography (CEUS) using microbubble-based contrast agents can visualize the perfused microvascular bed, we sought to evaluate the impairment of renal perfusion during acute renal congestion with CEUS. In Wister rats, CEUS of kidney was performed with the direct monitoring of CVP and intra-renal pressure (IRP). When CVP was elevated to 10 and 15 mmHg after the bolus injection of normal saline via the femoral vein, peak intensity (PI, dB) and time to PI (TTP) in the renal cortex and medulla were compared with control rats...
October 13, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29018182/role-of-nitric-oxide-pathway-in-development-and-progression-of-chronic-kidney-disease-in-rats-sensitive-and-resistant-to-its-occurrence-in-an-experimental-model-of-5-6-nephrectomy
#18
Marek Saracyn, Katarzyna Czarzasta, Marek Brytan, Piotr Murawski, Sławomir Lewicki, Tomasz Ząbkowski, Robert Zdanowski, Agnieszka Cudnoch-Jędrzejewska, Grzegorz Wiktor Kamiński, Zofia Wańkowicz
BACKGROUND Understanding the mechanisms conditioning development of chronic kidney disease (CKD) is still a challenge. The aim of this study was to evaluate the activity of the intrarenal nitric oxide (NO) pathway in the context of sensitivity or resistance of different animal strains to the development and degree of renal failure. MATERIAL AND METHODS Two rat strains were used: Wistar (WR) and Sprague-Dawley rats (SDR) in a model of CKD - 5/6 nephrectomy. We assessed parameters of renal failure and expression of nitric oxide synthase (NOS) isoforms in renal cortex and medulla...
October 11, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28988287/kinetic-measurements-of-di-and-tripeptide-and-peptidomimetic-drug-transport-in-different-kidney-regions-using-the-fluorescent-membrane-potential-sensitive-dye-dis-c3-3
#19
Othman A Alghamdi, Nicola King, Graham L Jones, Pierre D J Moens
Tri- and dipeptides are transported in the kidney by PEPT1 and PEPT2 isoforms. The aim of this study was to investigate differences in transport kinetics between renal brush border (BBMV) and outer medulla (OMMV) membrane vesicles (where PEPT1 and PEPT2 are sequentially available) for a range of di- and tripeptides and peptidomimetic drugs. This was accomplished through the use of the potential-sensitive fluorescent dye 3,3'-dipropylthiacarbocyanine iodide [DiS-C3-(3)]. BBMV and OMMV were prepared from the rat kidney using standard techniques...
October 7, 2017: Journal of Membrane Biology
https://www.readbyqxmd.com/read/28975804/rejection-evaluation-after-renal-transplantation-using-mr-diffusion-tensor-imaging
#20
Emin Deger, Azim Celik, Hamad Dheir, Volkan Turunc, Ahmet Yardimci, Mert Torun, Mutlu Cihangiroglu
Background Renal allograft dysfunction monitoring is mainly performed using the serum creatinine (SC) level, Doppler ultrasound (US), or renal biopsy. Recently proposed diffusion-based magnetic resonance imaging (MRI) methods have been explored as new, non-invasive tools for assessing renal function after transplantation. Purpose To investigate the value of fractional anisotropy (FA) measurements in the evaluation of acute rejection cases after renal transplant. Material and Methods Doppler US and MRI diffusion tensor imaging (DTI) were performed in 21 patients with graft dysfunction requiring graft biopsy after renal transplantation and in 21 patients with normal graft function...
January 1, 2017: Acta Radiologica
keyword
keyword
81187
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"