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https://www.readbyqxmd.com/read/28811010/distinct-clinical-characteristics-of-paroxysmal-nocturnal-hemoglobinuria-in-patients-in-southern-taiwan-a-multicenter-investigation
#1
Hui-Ching Wang, Ching-Yuan Kuo, I-Ting Liu, Tsai-Yun Chen, Yu-Hsiang Chang, Shyh-Jer Lin, Shih-Feng Cho, Yi-Chang Liu, Ta-Chih Liu, Sheng-Fung Lin, Chao-Sung Chang
Paroxysmal nocturnal hemoglobinuria (PNH) is an extremely rare acquired disorder. The aim of this study was to investigate the demographics, clinical manifestations, and outcomes of PNH patients in southern Taiwan. Data on PNH patients diagnosed over a 30-year period (1985-2015) were retrospectively collected from four tertiary medical centers in southern Taiwan. Blood samples were collected for hematologic panel testing and flow cytometry detection of PNH clones. Radiologic studies were performed to assess the frequency of complications...
August 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28804237/aneurysmal-degeneration-of-the-brachial-artery-after-vascular-access-creation-surgical-treatment-results
#2
Sérgio Teixeira, Pedro Sá Pinto, Carlos Veiga, Ivone Silva, Rui Almeida
True peripheral artery aneurysms proximal to a longstanding arteriovenous fistula is a well-recognized complication. Late aneurysmal degeneration is rare. This study analyzed the characteristics, therapeutic options, and outcomes of true donor brachial artery aneurysms (DBAA) after arteriovenous fistula (AVF) for hemodialysis. We retrospectively collected the data of patients with DBAA after AVF creation, surgically repaired between January 2001 and September 2015. We excluded patients with pseudoaneurysms, anastomotic aneurysms, and infected aneurysms...
September 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28768667/trpv4-channels-contribute-to-renal-myogenic-autoregulation-in-neonatal-pigs
#3
Hitesh Soni, Dieniffer Peixoto-Neves, Anberitha T Matthews, Adebowale Adebiyi
Myogenic response, a phenomenon in which resistance size arteries and arterioles swiftly constrict or dilate in response to an acute elevation or reduction, respectively in intravascular pressure is a key component of renal autoregulation mechanisms. Although it is well-established that the renal system is functionally immature in neonates, mechanisms that regulate neonatal renal blood flow (RBF) remain poorly understood. In this study, we investigated the hypothesis that members of the transient receptor potential vanilloid (TRPV) channels are molecular components of renal myogenic constriction in newborns...
August 2, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28768662/stimulation-of-diuresis-and-natriuresis-by-renomedullary-infusion-of-a-dual-inhibitor-of-fatty-acid-amide-hydrolase-and-monoacylglycerol-lipase
#4
Ashfaq Ahmad, Zdravka Daneva, Guangbi Li, Sara K Dempsey, Ningjun Li, Justin Poklis, Aron Lichtman, Pin-Lan Li, Joseph Kraft Ritter
The renal medulla, considered critical for the regulation of salt and water balance and long-term blood pressure control, is enriched in anandamide and two of its major metabolizing enzymes, cyclooxygenase-2 (COX-2) and fatty acid amide hydrolase (FAAH). Infusion of anandamide (15, 30 and 60 nmol/min/kg) into the renal medulla of C57BL/6J mice stimulated diuresis and salt excretion in a COX-2- but not COX-1-dependent manner. To determine if endogenous endocannabinoids in the renal medulla can elicit similar effects, the effects of intramedullary isopropyl dodecyl fluorophosphate (IDFP), which inhibits the two major endocannabinoid hydrolases, were studied...
August 2, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28766875/species-differences-in-renal-development-and-associated-developmental-nephrotoxicity
#5
REVIEW
Kendall S Frazier
The developing kidney is sensitive to both morphological and functional disturbances during the gestational and postnatal phases of growth and differentiation. Exposure to drugs or chemicals during these critical windows of renal development can result in aplasia, dysplasia, polycystic kidney disease, hydronephrosis, or other features characteristic of nephrotoxicity, including tubule dilation, necrosis, or mineralization. Functional effects can occur without associated morphological abnormalities. Differences in the timing of nephrogenesis and morphologic renal development among species help to explain specific phenotypes of various gestational and postnatal teratogens and nephrotoxins...
August 2, 2017: Birth defects research
https://www.readbyqxmd.com/read/28762611/pregnancy-on-short-daily-home-hemodialysis-using-low-dialysate-flow-rate-a-new-hope-for-the-end-stage-renal-disease-patients
#6
Vincent Leduc, Maxence Ficheux, Clémence Bechade, Michel Dreyfus, Thierry Lobbedez, Patrick Henri
INTRODUCTION: In France in 2014, there were approximately 1500 patients of reproductive age treated by dialysis. Pregnancy in these patients remains rare, however, the incidence has increased since the 2000s, with a parallel increase in the fetal survival rate. We report 2 cases of pregnancy in short-daily home hemodialysis using low dialysate flow rate. METHODS: Short-daily hemodialysis was continued at the request of the patients. The treatment consisted in an increase of frequency and duration of hemodialysis sessions, an independent blood pressure and dry weight control supervised by nephrological monitoring twice a month and a regular obstetrics follow-up...
August 1, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28761230/renal-biopsy-in-paroxysmal-nocturnal-hemoglobinuria-an-insight-into-the-spectrum-of-morphologic-changes
#7
V Puri, A Gandhi, S Sharma
Paroxysmal nocturnal hemoglobinuria (PNH) is a rare, acquired, potentially life-threatening disease of blood, characterized by complement-induced intravascular hemolytic anemia and thrombosis. PNH can sometimes present directly with renal manifestations, without showing any hematological manifestation. It, therefore, becomes essential for clinicians and pathologists to be aware of the spectrum of renal changes in PNH. The aim of this study was to document the morphologic changes observed in renal biopsies in patients with PNH...
July 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28754555/elastin-insufficiency-causes-hypertension-structural%C3%A2-defects-and-abnormal-remodeling-of%C3%A2-renal-vascular-signaling
#8
Elizabeth A Owens, Li Jie, Beverly A S Reyes, Elisabeth J Van Bockstaele, Patrick Osei-Owusu
Elastin deficiency causes vascular stiffening, a leading risk for hypertension and chronic kidney disease (CKD). The mechanisms mediating hypertension and/or CKD pathogenesis due to elastin deficiency are poorly understood. Using the elastin heterozygous (Eln+/-) mouse model, we tested whether renal dysfunction due to elastin deficiency occurs independently of and precedes the development of hypertension. We assessed blood pressure and renal hemodynamics in 30-day and 12-week-old male and female mice. At P30, blood pressure of Eln+/- mice was similar to wild-type controls; however, renal blood flow was lower, whereas renal vascular resistance was augmented at baseline in Eln+/- mice...
July 26, 2017: Kidney International
https://www.readbyqxmd.com/read/28748582/extravasal-albumin-concentration-modulates-contractile-responses-of-renal-afferent-arterioles
#9
Xiang Gao, Zhi Zhao Liu, Hayar Mohammed, Zhengbing Zhuge, Ming Liu, En Yin Lai, Leif Jansson, Mattias Carlström, Andreas Patzak, A Erik G Persson
AIM: Afferent arterioles (AA) hold a key position in the regulation of renal blood flow and glomerular filtration rate. Being the effector site of tubuloglomerular feedback the afferent arteriole contributes to the renal handling of sodium and fluid. Dehydration goes along with increased renal interstitial protein concentration. Here, the hypothesis was tested that extravasal protein concentration directly modulates afferent arteriolar tone; a mechanism which may contribute to body fluid volume control...
July 27, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28748414/the-effect-of-arterial-curvature-on-blood-flow-in-arterio-venous-fistulae-realistic-geometries-and-pulsatile-flow
#10
L Grechy, F Iori, R W Corbett, W Gedroyc, N Duncan, C G Caro, P E Vincent
Arterio-Venous Fistulae (AVF) are regarded as the "gold standard" method of vascular access for patients with End-Stage Renal Disease (ESRD) who require haemodialysis. However, up to 60% of AVF do not mature, and hence fail, as a result of Intimal Hyperplasia (IH). Unphysiological flow and oxygen transport patterns, associated with the unnatural and often complex geometries of AVF, are believed to be implicated in the development of IH. Previous studies have investigated the effect of arterial curvature on blood flow in AVF using idealized planar AVF configurations and non-pulsatile inflow conditions...
July 26, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28746184/theoretical-mechanism-of-temporary-renal-function-improvement-after-abdominal-aortic-aneurysm-surgery-applications-for-clinical-imaging-and-laboratory-data
#11
Katsuyuki Hoshina, Takafumi Akai, Marie Ohshima, Toshiaki Watanabe, Sota Yamamoto
We evaluated the effects of changes in blood flow due to abdominal aortic aneurysm (AAA) surgery by using a simple zero-dimension model and applied theoretical values to clinical data.The zero-dimension electronic circuit model and diagram of blood flow distribution were created by setting the resistance of the aorta, bilateral iliac arteries, renal arteries, and aneurysm. Resistance of the aneurysm and resistance of the aorta before surgery were compared with that of the aorta after surgery. We set the radius length of each anatomical parameter to calculate theoretical values...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28743964/toll-like-receptor-4-deficiency-reduces-oxidative-stress-and-macrophage-mediated-inflammation-in-hypertensive-kidney
#12
Sathnur Pushpakumar, Lu Ren, Sourav Kundu, Alejandra Gamon, Suresh C Tyagi, Utpal Sen
Oxidative stress and inflammation are integral to hypertension-induced renal injury. A unifying feature for the two components is Toll-like receptors (TLR), which are key regulators of the innate immune system. Recent studies implicate TLR4 activation and oxidative stress in cardiovascular diseases and also as a link between inflammation and hypertension. However, its role in hypertension induced renal injury remains unexplored. In the present study, we investigated whether TLR-4 deficiency reduces Ang-II-induced renal injury and fibrosis by attenuating reactive oxygen species (ROS) production and inflammation...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735998/assessment-of-spleen-filtrate-function-in-renal-transplant-recipients-using-technetium-99m-stannous-colloid-liver-spleen-scan
#13
N C Araújo, M B Neves, C A Mandarim-de-Lacerda, M M C Orlando
BACKGROUND: Functional hyposplenism (FH) is indicated by an anatomically present spleen that fails to take up radiolabeled colloid. The occurrence of FH has been reported in a small group of renal transplant recipients based on hematologic parameters. The aim of this study was to replicate this association in a larger group of renal transplant recipients with the use of technetium-99m-stannous colloid liver-spleen scan to assess the spleen function. METHODS: This survey based on single samples enrolled 101 unselected adult patients with functional kidney grafts >180 days after transplantation...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28735065/time-required-for-resetting-postural-effects-on-serum-constituents-in-healthy-individuals
#14
Yoshihisa Shimizu, Kiyoshi Ichihara, Katsunori Kouguchi
OBJECTIVE: We investigated postural effects on concentrations of commonly measured serum analytes and sought for optimal duration of sitting before venipuncture in an outpatient setting. METHODS: Seven healthy volunteers changed posture serially at 30-minute (min) intervals from lying, sitting, slowly walking, sitting, and to lying again. At the end of the first lying posture, wing-needle was inserted into cubital vein and 3mL of blood was drawn every 5min. All the serum was stored at -80°C until the time of collective measurements for 16 major chemistry analytes two weeks later...
July 19, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28732730/thermo-responsive-hydroxybutyl-chitosan-hydrogel-as-artery-intervention-embolic-agent-for-hemorrhage-control
#15
Guohui Sun, Chao Feng, Changqing Jiang, Tingting Zhang, Zixian Bao, Yajun Zuo, Ming Kong, Xiaojie Cheng, Ya Liu, Xiguang Chen
This work targeted to investigate the potential of thermo-responsive hydroxybutyl chitosan (HBC) hydrogel using as an embolic material for occlusion of selective blood vessels. HBC hydrogel was prepared via an etherification reaction between chitosan (CS) and 1, 2-butene oxide. The hydroxybutyl groups were introduced into CS backbone, which endowed HBC hydrogel with properties of porous structure, favorable hydrophilia and rapid sol-gel interconvertibility. The gelation temperatures and gelation time respectively decreased from 30...
July 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28731900/micro-and-macro-circulatory-changes-during-sepsis-and-septic-shock-in-a-rat-model
#16
Tianfeng Hua, Xiaobo Wu, Wei Wang, Hao Li, Jennifer Bradley, Mary Ann Peberdy, Joseph P Ornato, Wanchun Tang
Microcirculation is the motor of sepsis. In the present study, we investigated whether microcirculatory alterations occur prior to changes of systemic hemodynamics in a rat model of cecum ligation and puncture (CLP)-induced sepsis. We further investigated renal microcirculatory changes during sepsis and compared those with buccal microcirculation. Twelve male Sprague-Dawley rats were randomized into a sham control group (n = 6) and a CLP group (n = 6). Perfused microvessel density (PVD) and microvascular flow index (MFI) were evaluated using sidestream dark field (SDF) video microscopy at baseline, 60, 120, 180, 240, 300, and 360 minutes following CLP...
July 20, 2017: Shock
https://www.readbyqxmd.com/read/28724607/renal-hemodynamic-effects-of-glucagon-like-peptide-1-agonist-are-mediated-by-nitric-oxide-but-not-prostaglandin
#17
Scott Culver Thomson, Ali Kashkouli, Zhi Zhao Liu, Prabhleen Singh
The incretin hormone, glucagon like peptide-1 (GLP-1), is known for responding to dietary fat and carbohydrate. It elicits effects on pancreas, gut, and brain to stabilize blood glucose levels. We have previously reported that the GLP-1 agonist, exenatide, vasodilates the kidney and suppresses proximal reabsorption. The present study was undertaken to determine whether the renal effects of exenatide are mediated by nitric oxide (NO) and/or prostaglandins. Inulin clearance (GFR) and urine flow rate (UV) were measured in anesthetized rats before and during exenatide infusion (1 nmol/h iv)...
July 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28720778/visualization-of-kidney-fibrosis-in-diabetic-nephropathy-by-long-diffusion-tensor-imaging-mri-with-spin-echo-sequence
#18
Jun-Ya Kaimori, Yoshitaka Isaka, Masaki Hatanaka, Satoko Yamamoto, Naotsugu Ichimaru, Akihiko Fujikawa, Hiroshi Shibata, Akira Fujimori, Sosuke Miyoshi, Takashi Yokawa, Kagayaki Kuroda, Toshiki Moriyama, Hiromi Rakugi, Shiro Takahara
Renal fibrosis (RF) is an indicator for progression of chronic kidney disease (CKD). Although diabetic nephropathy (DN) is the leading cause of CKD and end-stage renal disease in Western populations, the ability of MRI to evaluate RF in DN patients has not been determined. As a first step to identify possible MRI methods for RF evaluation, we examined the use of diffusion tensor imaging (DTI) MRI to evaluate RF in a rat model of DN (SHR/NDmcr-cp(cp/cp): SHR/ND). The signal-to-noise ratio in DTI MRI was enhanced using a spin-echo sequence, and a special kidney attachment was developed for long-term stabilization...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28714241/cytokine-profiles-in-tibetan-macaques-following-%C3%AE-1-3-galactosyltransferase-knockout-pig-liver-xenotransplantation
#19
Zhuochao Zhang, Xiao Li, Hong Zhang, Xuan Zhang, Hui Chen, Dengke Pan, Hongchen Ji, Liang Zhou, Juan Ling, Jingshi Zhou, Shuqiang Yue, Desheng Wang, Zhaoxu Yang, Kaishan Tao, Kefeng Dou
BACKGROUND: Pig-to-nonhuman primate orthotopic liver xenotransplantation is often accompanied by thrombocytopenia and coagulation disorders. Furthermore, the release of cytokines can trigger cascade reactions of coagulation and immune attacks within transplant recipients. To better elucidate the process of inflammation in liver xenograft recipients, we utilized a modified heterotopic auxiliary liver xenotransplantation model for xeno-immunological research. We studied the cytokine profiles and the relationship between cytokine levels and xenograft function after liver xenotransplantation...
July 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28711449/intrarenal-flow-alterations-during-transition-from-euvolemia-to-intravascular-volume-expansion-in-heart-failure-patients
#20
Petra Nijst, Pieter Martens, Matthias Dupont, W H Wilson Tang, Wilfried Mullens
OBJECTIVES: The goal of this study was to assess: 1) the intrarenal flow in heart failure (HF) patients during the transition from euvolemia to intravascular volume overload; and 2) the relationship between intrarenal flow and diuretic efficiency. BACKGROUND: Intrarenal blood flow alterations may help to better understand impaired volume handling in HF. METHODS: Resistance index (RI) and venous impedance index (VII) were assessed in 6 healthy subjects, 40 euvolemic HF patients with reduced ejection fraction (HFrEF) and 10 HF patients with preserved ejection fraction (HFpEF)...
July 6, 2017: JACC. Heart Failure
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