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https://www.readbyqxmd.com/read/29679702/alamandine-attenuates-sepsis-associated-cardiac-dysfunction-via-inhibiting-mapks-signaling-pathways
#1
Peng Li, Xi-Ru Chen, Fei Xu, Chi Liu, Chang Li, Hui Liu, Hui Wang, Wei Sun, Yan-Hui Sheng, Xiang-Qing Kong
Sepsis-induced myocardial dysfunction represents a major cause of death in intensive care units. Alamandine is an important biologically active peptide in the renin-angiotensin system. The present study evaluated whether alamandine improves cardiac dysfunction, inflammation, and apoptosis, and affects the signaling pathways involved in these events. Experiments were carried out in mice treated with lipopolysaccharide (LPS) or alamandine, and in neonatal rat cardiomyocytes. Alamandine increased the ejection fraction and fractional shortening, both of which were decreased upon LPS infusion in mice...
April 18, 2018: Life Sciences
https://www.readbyqxmd.com/read/29679442/immunolocalization-of-g-protein-coupled-estrogen-receptor-in-the-pig-epididymis
#2
Malivindi Rocco, Aquila Saveria, Rago Vittoria
The presence of estrogen in the genital ducts of different mammalian species has been extensively studied and the estrogen influence on the functional activity of the male genital tract has been hypothesized. Conversely, very few data have been reported on pig excurrent ducts: the localization of classical estrogen receptors (ERα and ERβ) is scarcely known, while the expression of the G protein-coupled receptor (GPER1), a membrane estrogen receptor, is still unknown in pig. The aim of the present study was to evaluate GPER1 expression in the different regions of the mature pig epididymis, using immunohistochemistry, western blot and RT-PCR analyses...
April 20, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29679246/reliability-of-tensiomyography-and-myotonometry-in-detecting-mechanical-and-contractile-characteristics-of-the-lumbar-erector-spinae-in-healthy-volunteers
#3
Christine Lohr, Klaus-Michael Braumann, Ruediger Reer, Jan Schroeder, Tobias Schmidt
PURPOSE: Tensiomyography™ (TMG) and MyotonPRO® (MMT) are two non-invasive devices for monitoring muscle contractile and mechanical characteristics. This study aimed to evaluate the test-retest reliability of TMG and MMT parameters for measuring (TMG:) muscle displacement (Dm ), contraction time (Tc ), and velocity (Vc ) and (MMT:) frequency (F), stiffness (S), and decrement (D) of the erector spinae muscles (ES) in healthy adults. A particular focus was set on the establishment of reliability measures for the previously barely evaluated secondary TMG parameter Vc ...
April 20, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29678546/comparison-of-ph-and-motility-of-the-small-intestine-of-healthy-subjects-and-patients-with-symptomatic-constipation-using-the-wireless-motility-capsule
#4
A Aburub, M Fischer, M Camilleri, J R Semler, H M Fadda
Gastrointestinal luminal pH shows a rise from the duodenum to the terminal ileum in healthy individuals. Our objectives were to compare the pH in the proximal small intestine (SI) (first 60 min of small intestinal transit) lumen of human volunteers and patients with symptomatic constipation; to quantify contractile pressure profiles of the proximal SI, and to assess the relationship between luminally-recorded contractile pressure and small intestinal transit times (SITT) of a non-disintegrating capsule that measures pH and pressure activity (wireless motility capsule)...
April 17, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29677358/lysophosphatidic-acid-induces-ecm-production-via-activation-of-the-mechanosensitive-yap-taz-transcriptional-pathway-in-trabecular-meshwork-cells
#5
Leona T Y Ho, Nikolai Skiba, Christoph Ullmer, Ponugoti Vasantha Rao
Purpose: Lysophosphatidic acid (LPA), a bioactive lipid, has been shown to increase resistance to aqueous humor outflow (AH) through the trabecular meshwork (TM). The molecular basis for this response of the TM to LPA, however, is not completely understood. In this study, we explored the possible involvement of mechanosensitive Yes-associated protein (YAP) and its paralog, transcriptional coactivator with PDZ-binding domain (TAZ), transcriptional activation in extracellular matrix (ECM) production by LPA-induced contractile activity in human TM cells (HTM)...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677212/pulsatile-operation-of-a-continuous-flow-right-ventricular-assist-device-rvad-to-improve-vascular-pulsatility
#6
Boon C Ng, Matthias Kleinheyer, Peter A Smith, Daniel Timms, William E Cohn, Einly Lim
Despite the widespread acceptance of rotary blood pump (RBP) in clinical use over the past decades, the diminished flow pulsatility generated by a fixed speed RBP has been regarded as a potential factor that may lead to adverse events such as vasculature stiffening and hemorrhagic strokes. In this study, we investigate the feasibility of generating physiological pulse pressure in the pulmonary circulation by modulating the speed of a right ventricular assist device (RVAD) in a mock circulation loop. A rectangular pulse profile with predetermined pulse width has been implemented as the pump speed pattern with two different phase shifts (0% and 50%) with respect to the ventricular contraction...
2018: PloS One
https://www.readbyqxmd.com/read/29677184/elasticity-based-boosting-of-neuroepithelial-nucleokinesis-via-indirect-energy-transfer-from-mother-to-daughter
#7
Tomoyasu Shinoda, Arata Nagasaka, Yasuhiro Inoue, Ryo Higuchi, Yoshiaki Minami, Kagayaki Kato, Makoto Suzuki, Takefumi Kondo, Takumi Kawaue, Kanako Saito, Naoto Ueno, Yugo Fukazawa, Masaharu Nagayama, Takashi Miura, Taiji Adachi, Takaki Miyata
Neural progenitor cells (NPCs), which are apicobasally elongated and densely packed in the developing brain, systematically move their nuclei/somata in a cell cycle-dependent manner, called interkinetic nuclear migration (IKNM): apical during G2 and basal during G1. Although intracellular molecular mechanisms of individual IKNM have been explored, how heterogeneous IKNMs are collectively coordinated is unknown. Our quantitative cell-biological and in silico analyses revealed that tissue elasticity mechanically assists an initial step of basalward IKNM...
April 20, 2018: PLoS Biology
https://www.readbyqxmd.com/read/29677038/postoperative-b-type-natriuretic-peptide-as-predictor-for-postoperative-outcomes-in-patients-implanted-with-left-ventricular-assist-devices
#8
Gardner Yost, Geetha Bhat, Patroklos Pappas, Antone Tatooles
Brain natriuretic peptide (BNP) is a cardiac neurohormone known to correlate with left ventricular (LV) dilation, decreased contractility, and increased stiffness. Consequently, BNP has been used as a prognostic tool to assess the degree of LV unloading for patients supported by continuous-flow LV assist devices (LVADs). We assessed the prognostic value of changes in BNP in the 2 weeks after LVAD implantation. This retrospective study analyzed laboratory findings and outcomes of 189 LVAD patients. Patients were separated into two groups based on whether serum BNP levels had improved from preoperative levels by postoperative day 14...
April 18, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29677035/outflow-cannula-systolic-slope-in-patients-with-left-ventricular-assist-devices-a-novel-marker-of-myocardial-contractility
#9
Jonathan Grinstein, Eric Kruse, Gabriel Sayer, Gene H Kim, Jayant Raikhelkar, Sara Kalantari, Nitasha Sarswat, Sirtaz Adatya, Takeyoshi Ota, Valluvan Jeevanandam, Victor Mor-Avi, Roberto M Lang, Nir Uriel
Left ventricular (LV) unloading with a LV assist device (LVAD) reverse remodels the heart and may lead to favorable changes in cellular architecture and LV geometry promoting myocardial recovery. Currently, there are no standardized methods for evaluating myocardial recovery. This study assesses the systolic slope of the LVAD outflow cannula as a marker for myocardial contractility. Doppler echocardiography (transthoracic echocardiogram [TTE]) of the LVAD outflow cannula and TTE of the LV cavity were prospectively collected in 57 patients with LVADs...
April 18, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29676616/laboratory-practical-to-study-the-differential-innervation-pathways-of-urinary-tract-smooth-muscle
#10
Benjamin E Rembetski, Caroline A Cobine, Bernard T Drumm
In the mammalian lower urinary tract, there is a reciprocal relationship between the contractile state of the bladder and urethra. As the bladder fills with urine, it remains relaxed to accommodate increases in volume, while the urethra remains contracted to prevent leakage of urine from the bladder to the exterior. Disruptions to the normal contractile state of the bladder and urethra can lead to abnormal micturition patterns and urinary incontinence. While both the bladder and urethra are smooth-muscle organs, they are differentially contracted by input from cholinergic and sympathetic nerves, respectively...
June 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29676614/sourcebook-update-intestinal-smooth-muscle-contractility-and-autonomic-control
#11
Philip D Langton
This laboratory practical requires first-year students to anticipate the effects of drugs active at cholinergic and adrenergic receptors on gut motility in order to design experiments during an authentic inquiry exercise. Rather than specifying a strict sequence of drug additions that aim to provide ideal demonstrations of pharmacological and physiological antagonism, I have instead designed switches into the drugs provided and set students, working in small teams, the task of identifying the switched drugs, an inquiry activity...
June 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29675856/adreno-muscarinic-synergy-in-the-male-human-urinary-outflow-tract
#12
Sebastian Walther, Frank Strittmatter, Martin Hennenberg, Christian Gratzke, Christian G Stief, Alexander Roosen
AIM: To examine putative interaction between adrenergic and muscarinic contractile activation in the human urinary outflow tract. METHODS: Tissue from the trigone and prostatic urethra was obtained from 12 cystectomy and 16 prostatectomy specimen. Contractions were elicited by exposure to exogenous agonists before and after inhibition of Rho kinase and protein kinase c (PKC). Immunofluorescence and Western-blot studies were performed using antibodies to muscarinic M3-receptors (M3-R) and alpha1A-adrenoreceptors (alpha1A-AR)...
April 20, 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29675322/reflective-lens-free-imaging-on-high-density-silicon-microelectrode-arrays-for-monitoring-and-evaluation-of-in-vitro-cardiac-contractility
#13
Thomas Pauwelyn, Richard Stahl, Lakyn Mayo, Xuan Zheng, Andy Lambrechts, Stefan Janssens, Liesbet Lagae, Veerle Reumers, Dries Braeken
The high rate of drug attrition caused by cardiotoxicity is a major challenge for drug development. Here, we developed a reflective lens-free imaging (RLFI) approach to non-invasively record in vitro cell deformation in cardiac monolayers with high temporal (169 fps) and non-reconstructed spatial resolution (352 µm) over a field-of-view of maximally 57 mm2 . The method is compatible with opaque surfaces and silicon-based devices. Further, we demonstrated that the system can detect the impairment of both contractility and fast excitation waves in cardiac monolayers...
April 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29674647/oxygen-doped-carbon-nanotubes-for-near-infrared-fluorescent-labels-and-imaging-probes
#14
Yoko Iizumi, Masako Yudasaka, Jaeho Kim, Hajime Sakakita, Tsukasa Takeuchi, Toshiya Okazaki
Chemical modification of carbon nanotube surface can controllably modulate their optical properties. Here we report a simple and effective synthesis method of oxygen-doped single-walled carbon nanotubes (o-SWCNTs), in which a thin film of SWCNTs is just irradiated under the UV light for a few minutes in air. By using this method, the epoxide-type oxygen-adducts (ep-SWCNTs) were produced in addition to the ether-type oxygen-adducts (eth-SWCNTs). The Treated (6, 5) ep-SWCNTs show a red-shifted luminescence at ~1280 nm, which corresponds to the most transparent regions for bio-materials...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29674179/morphology-and-morphogenesis-of-a-new-soil-urostylid-ciliate-australothrix-xianiensis-nov-spec-ciliophora-hypotrichia
#15
Zhao Lyu, Jingbao Li, Shuyan Qi, Yuhe Yu, Chen Shao
The living morphology, infraciliature and morphogenetic events of a new soil urostylid ciliate, Australothrix xianiensis nov. spec., collected from Chanba National Wetland Park in Xi'an, China, were studied in vivo and after protargol preparation. Australothrix xianiensis nov. spec. is characterized as follows: about 190-240 × 40-60 μm in life; body pisciform and dark; cortical granules arranged in longitudinal rows on both sides, colourless, rod-shaped and about 2 × 1 μm in size; single contractile vacuole slightly ahead of mid-body with two long collecting canals; macronuclear nodules scattered throughout cytoplasm; adoral zone occupies about 20% of body length, composed of about 32 membranelles; three frontal cirri and one buccal cirrus; two to four midventral pairs and four or five midventral rows, one left and two right marginal rows; four or five dorsal kineties; four or five caudal cirri...
April 5, 2018: European Journal of Protistology
https://www.readbyqxmd.com/read/29674178/dawn-of-astome-ciliates-in-light-of-morphology-and-time-calibrated-phylogeny-of-haptophrya-planariarum-an-obligate-endosymbiont-of-freshwater-turbellarians
#16
Matej Rataj, Peter Vďačný
Morphology, systematic position and time-calibrated phylogeny of Haptophrya planariarum were investigated. This endosymbiont of freshwater turbellarians is characterized by: (i) a length of about 200-900 μm; (ii) a campanulate to truncate claviform body carrying an anterior adhesive sucker; (iii) an ellipsoidal macronucleus localized in the rear body end; (iv) a contractile canal extending along the dorsal margin; and (v) usually more than 150 meridional ciliary rows, a horseshoe-shaped suture line along the sucker, and two inconspicuous secant systems at lateral ends of the suture line...
April 5, 2018: European Journal of Protistology
https://www.readbyqxmd.com/read/29674140/impaired-ca-2-cycling-of-nonischemic-myocytes-contributes-to-sarcomere-dysfunction-early-after-myocardial-infarction
#17
Annette Kronenbitter, Florian Funk, Katarzyna Hackert, Simone Gorreßen, Dennis Glaser, Peter Boknik, Gereon Poschmann, Kai Stühler, Malgorzata Isić, Martina Krüger, Joachim P Schmitt
Changes in the nonischemic remote myocardium of the heart contribute to left ventricular dysfunction after ischemia and reperfusion (I/R). Understanding the underlying mechanisms early after I/R is crucial to improve the adaptation of the viable myocardium to increased mechanical demands. Here, we investigated the role of myocyte Ca2+ handling in the remote myocardium 24 h after 60 min LAD occlusion. Cardiomyocytes isolated from the basal noninfarct-related parts of wild type mouse hearts demonstrated depressed beat-to-beat Ca2+ handling...
April 16, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29673908/mechanism-underlying-the-contractile-activity-of-utp-in-the-mammalian-heart
#18
Ulrich Gergs, Daniel Rothkirch, Britt Hofmann, Hendrik Treede, Bernard Robaye, Andreas Simm, Christa E Müller, Joachim Neumann
We previously reported that uridine 5'-triphosphate (UTP), a pyrimidine nucleoside triphosphate produced a concentration- and time-dependent increase in the contraction force in isolated right atrial preparations from patients undergoing cardiac bypass surgery due to angina pectoris. The stimulation of the force of contraction was sustained rather than transient. In the present study, we tried to elucidate the underlying receptor and signal transduction for this effect of UTP. Therefore, we measured the effect of UTP on force of contraction, phosphorylation of p38 and ERK1/2, in human atrial preparations, atrial preparations from genetically modified mice, cardiomyocytes from adult mice and cardiomyocytes from neonatal rats...
April 16, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29673700/nrf2-deficiency-exacerbates-age-related-contractile-dysfunction-and-loss-of-skeletal-muscle-mass
#19
Bumsoo Ahn, Gavin Pharaoh, Pavithra Premkumar, Kendra Huseman, Rojina Ranjit, Michael Kinter, Luke Szweda, Tamas Kiss, Gabor Fulop, Stefano Tarantini, Anna Csiszar, Zoltan Ungvari, Holly Van Remmen
No abstract text is available yet for this article.
April 6, 2018: Redox Biology
https://www.readbyqxmd.com/read/29672903/cirrhotic-cardiomyopathy-after-transplantation-neither-the-transient-nor-innocent-bystander
#20
Manhal Izzy, Jae Oh, Kymberly D Watt
Cirrhotic cardiomyopathy in end stage liver disease is currently characterized by blunted contractile systolic response to stress with or without diastolic dysfunction in the absence of known heart disease. Since the establishment of the diagnostic criteria of cirrhotic cardiomyopathy in 2005, there have been multiple studies regarding its pathophysiology and pre-transplant clinical course. The data regarding the post-transplant course of this entity are sparse. This review addresses the course and prognosis of the elements of cirrhotic cardiomyopathy after liver transplantation...
April 19, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
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