keyword
MENU ▼
Read by QxMD icon Read
search

Tissue handling

keyword
https://www.readbyqxmd.com/read/28811460/prevention-of-atrial-fibrillation-by-using-sarcoplasmic-reticulum-calcium-atpase-pump-overexpression-in-a-rabbit-model-of-rapid-atrial-pacing
#1
Hong Li Wang, Xian Hui Zhou, Zhi Qiang Li, Ping Fan, Qi Na Zhou, Yao Dong Li, Yue Mei Hou, Bao Peng Tang
BACKGROUND Recent research suggests that abnormal Ca2+ handling plays a role in the occurrence and maintenance of atrial fibrillation (AF). Therefore, Ca2+ release and ingestion depend on properties of the ryanodine receptor (RyR) and sarcoplasmic reticulum Ca2+ATPase2a (SERCA2a). This study aimed to detect whether SERCA2a gene overexpression has a preventive effect on atrial fibrillation caused by rapid pacing right atrium. MATERIAL AND METHODS Forty-eight New Zealand white rabbits were randomly divided into a control group, AF group, AAV9/GFP group, and AAV9/SERCA2a group...
August 16, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28809633/the-potential-of-the-icuc%C3%A2-documentation-concept-to-improve-trauma-surgery
#2
P Regazzoni, A A Fernandez Dell'oca, S M Perren
Conventional documentation of surgical procedures using only pre- and postoperative X-ray images and possibly a few intra-operative pictures does not allow secondary analysis of the technical performance in detail. In particular, the quality of the handling of tissues and surgical tools cannot be judged «post hoc», i.e. after the end of the surgical procedure. The invasiveness of the surgical act cannot yet be quantified. Surrogate invasiveness indices have therefore been developed. Furthermore, conventional documentation does not allow evaluation of the proper use of the C-arm both technically and with regard to fluoroscopy time...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28809031/an-early-chick-embryo-culture-device-for-extended-continuous-observation
#3
Hans-Georg Sydow, Tobias Pieper, Christoph Viebahn, Nikoloz Tsikolia
Appropriate mechanical tension of the vitelline membrane as the culture substrate for the early chick embryo is frequently reported to be required for successful in vitro development. Here we describe a modified device, made of anodized aluminum, for in vitro culture which we used for studies of left-right symmetry breaking with emphasis on morphology and gene expression as readouts. The technique allows for easy, high-throughput tissue handling and provides a suitable tension in a stable and easily reproducible manner proven to be suitable for correct molecular left-right patterning and heart looping after long-term culture...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28807015/genomic-upregulation-of-cardiac-cav1-2%C3%AE-and-ncx1-by-estrogen-in-women
#4
Rita Papp, Glenna C L Bett, Agnieszka Lis, Randall L Rasmusson, István Baczkó, András Varró, Guy Salama
BACKGROUND: Women have a higher risk of lethal arrhythmias than men in long QT syndrome type 2 (LQTS2), but the mechanisms remain uncertain due to the limited availability of healthy control human tissue. We have previously reported that in female rabbits, estrogen increases arrhythmia risk in drug-induced LQTS2 by upregulating L-type Ca(2+) (ICa,L) and sodium-calcium exchange (INCX) currents at the base of the epicardium by a genomic mechanism. This study investigates if the effects of estrogen on rabbit ICa,L and INCX apply to human hearts...
August 14, 2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28804994/neutron-activatable-needles-for-radionuclide-therapy-of-solid-tumors
#5
Junghyun Kim, Roger J Narayan, Xiuling Lu, Michael Jay
Various approaches have been undertaken to enhance the delivery of therapeutic agents, including tissue-killing radionuclides, into solid tumors. Here we describe the preparation of conical needles composed of Ti and Mo coated by pulsed laser deposition or chemical vapor deposition with elements (Ho and Re) that can readily yield radioactive isotopes following irradiation in a neutron flux. The radioactive needles, whose design were based on solid microneedle arrays used in transdermal drug delivery, can be produced with minimal handling of radioactivity and subsequently inserted into tumors as a means of internal radiation therapy...
August 14, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28803650/lipid-determination-in-bone-marrow-and-mineralized-bone-tissue-from-sample-preparation-to-improved-high-performance-thin-layer-and-liquid-chromatographic-approaches
#6
Alexandrine During
In view of their key roles in the bone physiology (e.g., in the biomineralization process) and their potential implication in bone pathologies, an approach to study lipids in situ is needed. The aim of the present paper is to propose an original procedure to characterize lipids in both bone marrow (BM) and mineralized tissue (MT) compartments, taking into consideration sample preparation, lipid extraction and analytical issues, when using small sample size (≤ 0.5g of rat femurs). The potential contamination of the MT by marrow lipids and the poor accessibility of certain lipids from the MT - two major issues in bone handling - were taking care, respectively by performing two cleaning steps after BM removal and by adding a demineralization step to the overall lipid extraction protocol...
August 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28800169/global-multi-electrode-contact-mapping-plus-ablation-with-a-single-catheter-preclinical-and-preliminary-experience-in-humans-with-atrial-fibrillation
#7
Hans Kottkamp, Fabian Moser, Andreas Rieger, Doreen Schreiber, Christian Pönisch, Monica Trofin
INTRODUCTION: One question for the technological advancement of catheter ablation of atrial fibrillation (AF) is whether a creative new concept can combine and even improve the diagnostic mapping options of single-tip and basket catheters with the simplicity of the use of balloon catheters for ablation. Herein, we describe the first in-human experience with a single catheter offering such a complete solution. METHODS AND RESULTS: A new catheter (Globe®) with a distal multi-electrode array consisting of 16 ribs with 122 gold-plated electrodes was used...
August 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28797510/soft-tissue-tumors-rarely-presenting-primary-in-bone-diagnostic-pitfalls
#8
REVIEW
Marta Sbaraglia, Alberto Righi, Marco Gambarotti, Daniel Vanel, Piero Picci, Angelo P Dei Tos
Primary bone sarcomas represent extremely rare entities. The use of now abolished labels, such as malignant fibrous histiocytoma and hemangiopericytoma, has significantly hampered the chance of identifying specific entities. It is now accepted that a broad variety of mesenchymal malignancies most often arising on the soft tissue may actually present as primary bone lesions. A more accurate morphologic partition is justified based on availability of distinct therapeutic options. An integrated diagnostic approach represents the only way to achieve a correct classification...
September 2017: Surgical Pathology Clinics
https://www.readbyqxmd.com/read/28792468/real-time-external-respiratory-motion-measuring-technique-using-an-rgb-d-camera-and-principal-component-analysis
#9
Udaya Wijenayake, Soon-Yong Park
Accurate tracking and modeling of internal and external respiratory motion in the thoracic and abdominal regions of a human body is a highly discussed topic in external beam radiotherapy treatment. Errors in target/normal tissue delineation and dose calculation and the increment of the healthy tissues being exposed to high radiation doses are some of the unsolicited problems caused due to inaccurate tracking of the respiratory motion. Many related works have been introduced for respiratory motion modeling, but a majority of them highly depend on radiography/fluoroscopy imaging, wearable markers or surgical node implanting techniques...
August 9, 2017: Sensors
https://www.readbyqxmd.com/read/28782880/adaptive-changes-of-telocytes-in-the-urinary-bladder-of-patients-affected-by-neurogenic-detrusor-overactivity
#10
Chiara Traini, Maria-Simonetta Fausssone-Pellegrini, Daniele Guasti, Giulio Del Popolo, Jacopo Frizzi, Sergio Serni, Maria-Giuliana Vannucchi
Urinary bladder activity involves central and autonomic nervous systems and bladder wall. Studies on the pathogenesis of voiding disorders such as the neurogenic detrusor overactivity (NDO) due to suprasacral spinal cord lesions have emphasized the importance of an abnormal handling of the afferent signals from urothelium and lamina propria (LP). In the LP (and detrusor), three types of telocytes (TC) are present and form a 3D-network. TC are stromal cells able to form the scaffold that contains and organizes the connective components, to serve as guide for tissue (re)-modelling, to produce trophic and/or regulatory molecules, to share privileged contacts with the immune cells...
August 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28777146/qualitative-comparison-between-carrier-based-and-classical-tissue-microarrays
#11
Katharina Lisenko, Jonas Leichsenring, Christiane Zgorzelski, Rémi Longuespée, Rita Casadonte, Alexander Harms, Daniel Kazdal, Albrecht Stenzinger, Arne Warth, Mark Kriegsmann
Tissue microarrays (TMAs) are commonly used in biomarker research. To enhance the efficacy of TMAs and to avoid floating or folding of tissue cores, various improvements such as the application of carriers and melting techniques have been proposed. Compared with classical TMAs (cTMAs), carrier-based TMAs (cbTMAs) have been shown to have several advantages including sample handling and sectioning. Up to now, little is known about the efficacy and quality of cbTMAs compared with cTMAs. Thus, we set out to compare both types systematically...
August 2, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28770259/scalable-3d-spatial-queries-for-analytical-pathology-imaging-with-mapreduce
#12
Yanhui Liang, Hoang Vo, Ablimit Aji, Jun Kong, Fusheng Wang
3D analytical pathology imaging examines high resolution 3D image volumes of human tissues to facilitate biomedical research and provide potential effective diagnostic assistance. Such approach - quantitative analysis of large-scale 3D pathology image volumes - generates tremendous amounts of spatially derived 3D micro-anatomic objects, such as 3D blood vessels and nuclei. Spatial exploration of such massive 3D spatial data requires effective and efficient querying methods. In this paper, we present a scalable and efficient 3D spatial query system for querying massive 3D spatial data based on MapReduce...
October 2016: Proceedings of the ... ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems: ACM GIS
https://www.readbyqxmd.com/read/28758421/pcsk9-deficiency-results-in-increased-ectopic-fat-accumulation-in-experimental-models-and-in-humans
#13
Andrea Baragetti, Gloria Balzarotti, Liliana Grigore, Fabio Pellegatta, Uliano Guerrini, Giuseppina Pisano, Anna L Fracanzani, Silvia Fargion, Giuseppe D Norata, Alberico L Catapano
Background Proprotein convertase subtilisin kexin type 9 (PCSK9) regulates low-density lipoprotein and very low-density lipoprotein receptor expression in several tissues. Here we evaluated whether PCSK9 may modulate the handling of triglycerides in the liver and peripheral tissues. Methods Subjects from the PLIC cohort were genotyped for the loss-of-function PCSK9 R46L variant and characterized for clinical and biochemical parameters, total and android fat mass, hepatic steatosis and epicardial fat thickness...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28756748/the-new-zealand-white-rabbit-as-a-model-for-preclinical-studies-addressing-tissue-repair-at-the-level-of-the-abdominal-wall
#14
Juan M Bellón, Marta Rodríguez, Barbara Perez-Kohler, Paloma Pérez-López, Gemma Pascual
In this report, we review the use of the New Zealand White rabbit as the experimental animal for several models of abdominal wall repair. For the repair of an abdominal wall defect such as a hernia in clinical practice, multiple types of prosthetic material exist. Before their marketing, each of these biomaterials needs to be tested in a preclinical setting to confirm its biocompatibility and appropriate behavior at the different tissue interfaces. For preclinical trials, we have always used the New Zealand White rabbit as the model owing to its ease of handling and suitable size...
July 29, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28756182/technical-aspects-and-recommendations-for-single-cell-qpcr
#15
REVIEW
Anders Ståhlberg, Mikael Kubista
Single cells are basic physiological and biological units that can function individually as well as in groups in tissues and organs. It is central to identify, characterize and profile single cells at molecular level to be able to distinguish different kinds, to understand their functions and determine how they interact with each other. During the last decade several technologies for single-cell profiling have been developed and used in various applications, revealing many novel findings. Quantitative PCR (qPCR) is one of the most developed methods for single-cell profiling that can be used to interrogate several analytes, including DNA, RNA and protein...
July 26, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28752326/modified-whole-mount-in-situ-hybridisation-and-immunohistochemistry-protocols-without-removal-of-the-vitelline-membrane-in-the-appendicularian-oikopleura-dioica
#16
Takeshi A Onuma, Masaki Matsuo, Hiroki Nishida
The appendicularian Oikopleura dioica is a planktonic chordate that retains a tadpole shape throughout its life. Its simple and transparent body, invariant cell lineages, fast development and available genome and transcriptome resources make it a promising model organism for research in developmental biology. However, large-scale analysis of gene expression in O. dioica is limited owing to the laborious and time-consuming process of manual removal of the vitelline membrane, because devitellinisation of pre-hatching embryos causes failure of normal development...
July 27, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28752324/effect-of-glucose-on-3d-cardiac-microtissues-derived-from%C3%A2-human-induced-pluripotent-stem-cells
#17
Michael Balistreri, Justin A Davis, Katherine F Campbell, André Monteiro Da Rocha, Marjorie C Treadwell, Todd J Herron
Maternal hyperglycemia is a risk factor for fetal cardiac anomalies. This study aimed to assess the effect of high glucose on human induced pluripotent stem cell-derived cardiomyocyte self-assembly into 3D microtissues and their calcium handling. Stem cells were differentiated to beating cardiomyocytes using established protocols. On the final day of the differentiation process, cells were treated with control media, 12 mM glucose, or 12 mM mannitol (an osmolality control). Once beating, the cardiac cells were dissociated with trypsin, collected, mixed with collagen, and plated into custom-made silicone micro molds in order to generate 3D cardiac microtissues...
July 27, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28749922/outbreak-of-septic-arthritis-associated-with-intra-articular-injections-at-an-outpatient-practice-new-jersey-2017
#18
Kathleen Ross, Jason Mehr, Barbara Carothers, Rebecca Greeley, Isaac Benowitz, Lisa McHugh, David Henry, Lisa DiFedele, Eric Adler, Shereen Naqvi, Edward Lifshitz, Christina Tan, Barbara Montana
On March 6, 2017, the New Jersey Department of Health (NJDOH) was notified of three cases of septic arthritis in patients who had received intra-articular injections for osteoarthritic knee pain at a private outpatient practice. The practice voluntarily closed the next day. NJDOH, in conjunction with the local health department and the New Jersey Board of Medical Examiners, conducted an investigation and identified 41 cases of septic arthritis associated with intra-articular injections administered during 250 patient visits at the same practice, including 30 (73%) patients who required surgery...
July 28, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28748521/clinical-outcome-of-alveolar-ridge-augmentation-with-individualized-cad-cam-produced-titanium-mesh
#19
K Sagheb, E Schiegnitz, M Moergel, C Walter, B Al-Nawas, W Wagner
BACKGROUND: The augmentation of the jaw has been and continues to be a sophisticated therapy in implantology. Modern CAD-CAM technologies lead to revival of old and established augmentation techniques such as the use of titanium mesh (TM) for bone augmentation. The aim of this retrospective study was to evaluate the clinical outcome of an individualized CAD-CAM-produced TM based on the CT/DVT-DICOM data of the patients for the first time. METHODS: In 17 patients, 21 different regions were augmented with an individualized CAD-CAM-produced TM (Yxoss CBR®, Filderstadt, Germany)...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28747251/serca-control-of-cell-death-and-survival
#20
REVIEW
Elie R Chemaly, Luca Troncone, Djamel Lebeche
Intracellular calcium (Ca(2+)) is a critical coordinator of various aspects of cellular physiology. It is increasingly apparent that changes in cellular Ca(2+) dynamics contribute to the regulation of normal and pathological signal transduction that controls cell growth and survival. Aberrant perturbations in Ca(2+) homeostasis have been implicated in a range of pathological conditions, such as cardiovascular diseases, diabetes, tumorigenesis and steatosis hepatitis. Intracellular Ca(2+) concentrations are therefore tightly regulated by a number of Ca(2+) handling enzymes, proteins, channels and transporters located in the plasma membrane and in Ca(2+) storage organelles, which work in concert to fine tune a temporally and spatially precise Ca(2+) signal...
July 12, 2017: Cell Calcium
keyword
keyword
110726
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"