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https://www.readbyqxmd.com/read/28428757/circadian-rhythm-in-kidney-tissue-oxygenation-in-the-rat
#1
Tonja W Emans, Ben J Janssen, Jaap A Joles, C T Paul Krediet
Blood pressure, renal hemodynamics, electrolyte, and water excretion all display diurnal oscillation. Disturbance of these patterns is associated with hypertension and chronic kidney disease. Kidney oxygenation is dependent on oxygen delivery and consumption that in turn are determined by renal hemodynamics and metabolism. We hypothesized that kidney oxygenation also demonstrates 24-h periodicity. Telemetric oxygen-sensitive carbon paste electrodes were implanted in Sprague-Dawley rats (250-300 g), either in renal medulla (n = 9) or cortex (n = 7)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28383431/cardiac-electrophysiological-alterations-and-clinical-response-in-cardiac-resynchronization-therapy-with-a-defibrillator-treated-patients-affected-by-metabolic-syndrome
#2
Celestino Sardu, Matteo Santamaria, Stefania Funaro, Cosimo Sacra, Michelangela Barbieri, Pasquale Paolisso, Raffaele Marfella, Giuseppe Paolisso, Maria Rosaria Rizzo
Metabolic syndrome (MS) is a multifactorial disease that can affect clinical outcomes in patients treated by Cardiac Resynchronization Therapy with a defibrillator (CRT-d).Ninety-one patients received a CRT-d. According to clinical diagnosis, the study population was divided into 46 MS (cases) versus 45 no MS (controls) patients. These patients were followed by clinical, instrumental assessment, and device telemetric interrogations at follow-up. The design of the study was to evaluate the functionality of the CRT-d leads, the arrhythmic events, the CRT-d response, and the clinical outcomes at follow-up...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28376903/the-prevalence-and-impact-of-babesia-canis-and-theileria-sp-in-free-ranging-grey-wolf-canis-lupus-populations-in-croatia
#3
Ana Beck, Doroteja Huber, Adam Polkinghorne, Andrea Gudan Kurilj, Valerija Benko, Vladimir Mrljak, Slaven Reljić, Josip Kusak, Irena Reil, Relja Beck
BACKGROUND: Babesia spp. and Theileria spp. are important emerging causes of disease in dogs. Alongside these domesticated hosts, there is increasing recognition that these piroplasms can also be found in a range of wild animals with isolated reports describing the presence of these pathogen in foxes (Vulpes vulpes) and captive grey wolves (Canis lupus). The prevalence and impact of these infections in free-ranging populations of canids are unknown. To gain a better insight into the epidemiology and pathogenesis of piroplasm infections in free-ranging grey wolves, pathological and molecular investigations into captive and free-ranging grey wolves in Croatia were performed...
April 4, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28350858/in-vivo-measured-joint-friction-in-hip-implants-during-walking-after-a-short-rest
#4
Philipp Damm, Alwina Bender, Georg Duda, Georg Bergmann
INTRODUCTION: It has been suspected that friction in hip implants is higher when walking is initiated after a resting period than during continuous movement. It cannot be excluded that such increased initial moments endanger the cup fixation in the acetabulum, overstress the taper connections in the implant or increase wear. To assess these risks, the contact forces, friction moments and friction coefficients in the joint were measured in vivo in ten subjects. Instrumented hip joint implants with telemetric data transmission were used to access the contact loads between the cup and head during the first steps of walking after a short rest...
2017: PloS One
https://www.readbyqxmd.com/read/28320855/salt-sensitivity-of-angiogenesis-inhibition-induced-blood-pressure-rise-role-of-interstitial-sodium-accumulation
#5
Stephanie Lankhorst, David Severs, Lajos Markó, Natalia Rakova, Jens Titze, Dominik N Müller, A H Jan Danser, Anton H van den Meiracker
In response to salt loading, Na(+) and Cl(-) accumulate in the skin in excess of water, stimulating skin lymphangiogenesis via activation of the mononuclear phagocyte system cell-derived vascular endothelial growth factor-C-vascular endothelial growth factor type 3 receptor signaling pathway. Inhibition of this pathway results in salt-sensitive hypertension. Sunitinib is an antiangiogenic, anticancer agent that blocks all 3 vascular endothelial growth factor receptors and increases blood pressure. We explored the salt dependency of sunitinib-induced hypertension and whether impairment of skin lymphangiogenesis is an underlying mechanism...
March 20, 2017: Hypertension
https://www.readbyqxmd.com/read/28319145/does-aquatic-exercise-reduce-hip-and-knee-joint-loading-in-vivo-load-measurements-with-instrumented-implants
#6
Ines Kutzner, Anja Richter, Katharina Gordt, Jörn Dymke, Philipp Damm, Georg N Duda, Reiner Günzl, Georg Bergmann
Aquatic exercises are widely used for rehabilitation or preventive therapies in order to enable mobilization and muscle strengthening while minimizing joint loading of the lower limb. The load reducing effect of water due to buoyancy is a main advantage compared to exercises on land. However, also drag forces have to be considered that act opposite to the relative motion of the body segments and require higher muscle activity. Due to these opposing effects on joint loading, the load-reducing effect during aquatic exercises remains unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28281769/long-term-surgical-anaesthesia-with-isoflurane-in-human-habituated-nile-crocodiles
#7
George F Stegmann, Catherine J A Williams, Craig Franklin, Tobias Wang, Michael Axelsson
A suitable long-term anaesthetic technique was required for implantation of physiological sensors and telemetric devices in sub-adult Nile crocodiles (Crocodylus niloticus) to allow the collection of physiological data. Five Nile crocodiles with a median body mass of 24 kg were used. After manual capture, they were blindfolded and 0.2 mL (1 mg/mL) medetomidine was administered intramuscularly in four of the animals which had an estimated body mass between 20 kg and 30 kg. One crocodile with an estimated body mass of 50 kg received 0...
February 24, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28278384/characterization-of-endogenous-nitric-oxide-role-in-myogenic-vascular-oscillations-during-cooling-evoked-hemodynamic-perturbations-of-rats
#8
Yi-Hsien Lin, Yia-Ping Liu, Yu-Chieh Lin, Po-Lei Lee, Che-Se Tung
Rapid immersion of a rat's limbs into 4°C water, a model of cold stress (CS), can elicit hemodynamic perturbations (CEHP). We have reported that CEHP is highly relevant to the sympathetic activation and nitric oxide production. This study identifies the role of nitric oxide in CEHP. Conscious rats were pretreated with the nitric oxide synthase inhibitor L-NAME alone or following the removal of sympathetic influences using hexamethonium or guanethidine, and then they were subjected to a 10-min CS trial. Hemodynamic indices were telemetrically monitored throughout the experiment...
March 9, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28261878/hemodynamic-and-perioperative-management-in-two-different-preclinical-pig-to-baboon-cardiac-xenotransplantation-models
#9
Tanja Mayr, Andreas Bauer, Bruno Reichart, Sonja Guethoff, Uwe Schoenmann, Matthias Längin, Alessandro Panelli, Alexander Kind, Paolo Brenner, Jan-Michael Abicht
BACKGROUND: The perioperative phase of preclinical cardiac xenotransplantations significantly affects the experimental outcome. Moderate or even severe hemodynamic and respiratory impairment occurs frequently in baboons after receiving a cardiac transplant. The perioperative management of such postoperative instability is very demanding, especially in the experimental setting. We compared perioperative changes of hemodynamic and laboratory findings during orthotopic and heterotopic thoracic cardiac xenotransplantations and describe our monitoring, treatment and intensive care...
March 5, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28225734/auditory-performance-and-electrical-stimulation-measures-in-cochlear-implant-recipients-with-auditory-neuropathy-compared-with-severe-to-profound-sensorineural-hearing-loss
#10
Joseph Attias, Tally Greenstein, Miriam Peled, David Ulanovski, Jay Wohlgelernter, Eyal Raveh
OBJECTIVES: The aim of the study was to compare auditory and speech outcomes and electrical parameters on average 8 years after cochlear implantation between children with isolated auditory neuropathy (AN) and children with sensorineural hearing loss (SNHL). DESIGN: The study was conducted at a tertiary, university-affiliated pediatric medical center. The cohort included 16 patients with isolated AN with current age of 5 to 12.2 years who had been using a cochlear implant for at least 3...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28156130/evaluation-of-various-cooling-systems-after-exercise-induced-hyperthermia
#11
Pearl M S Tan, Eunice Y N Teo, Noreffendy B Ali, Bryan C H Ang, Iswady Iskandar, Lydia Y L Law, Jason K W Lee
CONTEXT: Rapid diagnosis and expeditious cooling of individuals with exertional heat stroke is paramount for survival. OBJECTIVE: To evaluate the efficacy of various cooling systems after exercise-induced hyperthermia. DESIGN: Crossover study. SETTING: Laboratory. PATIENTS OR OTHER PARTICIPANTS: Twenty-two men (age = 24 ± 2 years, height = 1.76 ± 0.07 m, mass = 70.7 ± 9.5 kg) participated. INTERVENTION(S): Each participant completed a treadmill walk until body core temperature reached 39...
February 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28150133/impact-of-age-and-polytherapy-on-fingolimod-induced-bradycardia-a-preclinical-study
#12
Christian Ritter, Martin K R Svačina, Ilja Bobylev, Abhijeet Joshi, Toni Schneider, Helmar C Lehmann
Fingolimod is a an oral disease modifying drug for relapsing remitting multiple sclerosis (MS) preventing egress of B and T cells from lymph nodes. Relevant first dose adverse events include bradycardia and atrioventricular conduction slowing. Cardiac side effects of fingolimod and combinational pharmacotherapy including duloxetine and tolterodine were monitored in mice of different age using implantable ECG telemetric systems. Cardiac tissue was assessed for S1P-receptor subtype (1 and 3), and for GIRK1 expression...
February 1, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28137611/analgesic-effect-of-dimethyl-trisulfide-in-mice-is-mediated-by-trpa1-and-sst4-receptors
#13
Gábor Pozsgai, Maja Payrits, Éva Sághy, Réka Sebestyén-Bátai, Elise Steen, Éva Szőke, Zoltán Sándor, Margit Solymár, András Garami, Péter Orvos, László Tálosi, Zsuzsanna Helyes, Erika Pintér
TRPA1 receptors are calcium-permeable ligand-gated channels expressed in primary sensory neurons and involved in inflammation and pain. Activation of these neurons might have analgesic effect. Suggested mechanism of analgesic effect mediated by TRPA1 activation is the release of somatostatin (SOM) and its action on sst4 receptors. In the present study analgesic effect of TRPA1 activation on primary sensory neurons by organic trisulfide compound dimethyl trisulfide (DMTS) presumably leading to SOM release was investigated...
January 28, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28134226/-the-evaluation-of-the-ventricular-arrhythmias-and-interventions-of-cardiac-implantable-electronic-devices-in-patients-with-dilated-cardiomyopathy-for-primary-prevention-of-sudden-cardiac-death-in-ambulatory-and-telemetric-follow-up
#14
Jacek Lelakowski, Anna Rydlewska, Maria Lelakowska, Joanna Pudło, Justyna Piekarz
Telemetric follow-up (RM) after cardiac devices implantation is not inferior to classic follow-up and enables earlier clinical complications detection. AIM: The aim of the study was to evaluation of the ventricular arrhythmias and interventions of ICD/CRTD in ambulatory and telemetric follow-up in patients with dilated cardiomyopathy. MATERIALS AND METHODS: Group A (CRT-D+ICD) - retrospective, patients followed-up in outpatient clinic - was consisted with 273 patients (mean age 65±11 years, 230M)...
January 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28093115/use-of-an-implantable-pump-for-controlled-subcutaneous-insulin-delivery-in-healthy-cats
#15
E Zini, I Padrutt, K Macha, A Riederer, M Pesaresi, T A Lutz, C E Reusch
The aim of this study was to examine the safety and reliability of a research-grade implantable pump for controlled delivery of insulin glargine in cats. For this purpose, a small telemetrically controlled drug delivery pump with a refillable reservoir was implanted into the subcutaneous tissues of the dorsal neck in 10 clinically healthy cats. The reservoir was filled with insulin glargine, and the pump was programmed to deliver four boluses of 0.25 IU/kg, 2-3 weeks apart. As a control, insulin glargine (0...
January 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28074534/depolarizing-gaba-contributes-to-glutamatergic-network-rewiring-in-epilepsy
#16
Nazim Kourdougli, Christophe Pellegrino, Juho-Matti Renko, Stanislav Khirug, Geneviève Chazal, Tiina-Kaisa Kukko-Lukjanov, Sari E Lauri, Jean-Luc Gaiarsa, Liang Zhou, Angélique Peret, Eero Castrén, Raimo Kalevi Tuominen, Valérie Crépel, Claudio Rivera
OBJECTIVE: Rewiring of excitatory glutamatergic neuronal circuits is a major abnormality in epilepsy. Besides the rewiring of excitatory circuit, an abnormal depolarizing GABAergic drive has been hypothesized to participate in the epileptogenic processes. However, a remaining clinically relevant question is whether early post Status Epilepticus (SE) evoked chloride dysregulation is important for the remodeling of aberrant glutamatergic neuronal circuit. METHODS: Osmotic mini-pumps were used to infuse intracerebrally a specific inhibitor of depolarizing GABAergic transmission as well as a functionally blocking antibody towards the pan-neurotrophin receptor p75 (p75(NTR) )...
January 11, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28045070/carbon-monoxide-pollution-aggravates-ischemic-heart-failure-through-oxidative-stress-pathway
#17
Cyril Reboul, Julien Boissière, Lucas André, Gregory Meyer, Patrice Bideaux, Gilles Fouret, Christine Feillet-Coudray, Philippe Obert, Alain Lacampagne, Jérôme Thireau, Olivier Cazorla, Sylvain Richard
Risk of hospital readmission and cardiac mortality increases with atmospheric pollution for patients with heart failure. The underlying mechanisms are unclear. Carbon monoxide (CO) a ubiquitous environmental pollutant could be involved. We explored the effect of daily exposure of CO relevant to urban pollution on post-myocardial infarcted animals. Rats with ischemic heart failure were exposed 4 weeks to daily peaks of CO mimicking urban exposure or to standard filtered air. CO exposure worsened cardiac contractile dysfunction evaluated by echocardiography and at the cardiomyocyte level...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28033128/renal-function-of-cyclin-m2-mg2-transporter-maintains-blood-pressure
#18
Yosuke Funato, Daisuke Yamazaki, Hiroaki Miki
OBJECTIVES: Epidemiological studies have shown that magnesium intake/excretion is inversely correlated with blood pressure (BP), and artificial supplementation of magnesium was able to prevent hypertension. However, there has been no molecular genetic study showing the importance of magnesium homeostasis in BP regulation. METHODS: We analyzed magnesium content and BP of mice lacking genes encoding cyclin M (CNNM) Mg transporter family proteins. RESULTS: Systemic heterozygotes and the kidney-specific homozygotes for Cnnm2-deficient alleles are both viable and show hypomagnesemia, indicating the important function of CNNM2 in maintaining magnesium homeostasis in the kidney...
March 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28013349/pharmacology-and-toxicology-of-the-novel-investigational-agent-cantrixil-trx-e-002-1
#19
REVIEW
Muhammad Wasif Saif, Andrew Heaton, Kimberley Lilischkis, James Garner, David M Brown
PURPOSE: Recurrent, chemo-resistant ovarian cancer is thought to be due to a subgroup of slow-growing, drug-resistant cancer cells with stem-like properties and a high capacity for tumour repair. Cantrixil targets this sub-population of cells and is being developed as an intraperitoneal therapy to be used as first-line therapy in combination with carboplatin for epithelial ovarian cancer. The studies presented here justify further development. METHODS: A GLP dog CV study using a 4 × 4 Latin Square Crossover study was conducted using telemetric ECG recordings from dogs post IP administration to assess for cardiac abnormalities...
February 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28010810/conventional-and-novel-body-temperature-measurement-during-rest-and-exercise-induced-hyperthermia
#20
COMPARATIVE STUDY
Colin Towey, Chris Easton, Robert Simpson, Charles Pedlar
Despite technological advances in thermal sensory equipment, few core temperature (TCORE) measurement techniques have met the established validity criteria in exercise science. Additionally, there is debate as to what method serves as the most practically viable, yet upholds the proposed measurement accuracy. This study assessed the accuracy of current and novel TCORE measurement techniques in comparison to rectal temperature (TREC) as a reference standard. Fifteen well-trained subjects (11 male, 4 female) completed 60min of exercise at an intensity equating to the lactate threshold; measured via a discontinuous exercise test...
January 2017: Journal of Thermal Biology
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