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Tissue handling

C Robo, G Hulsart-Billström, M Nilsson, C Persson
Poly(methyl methacrylate) (PMMA) is the most commonly used material for the treatment of osteoporosis-induced vertebral compression fractures. However, its high stiffness may introduce an increased risk of adjacent vertebral fractures post-surgery. One alternative in overcoming this concern is the use of additives. This presents its own challenge in maintaining an adequate biocompatibility when modifying the base cement. The aim of this study was to evaluate the in vivo biocompatibility of linoleic acid (LA)-modified acrylic bone cement using a large animal model for the first time, in order to further advance towards clinical use...
March 17, 2018: Acta Biomaterialia
Michael Oeverhaus, Margarethe Fischer, Herbert Hirche, Anke Schlüter, Joachim Esser, Anja K Eckstein
BACKGROUND/AIMS: We performed a retrospective analysis to examine clinical results, establish a dose-effect coefficient and analyze the long-term efficacy of tendon elongation with bovine pericardium (Tutopatch®) for surgical correction of severe esotropia, occurring after three-wall orbital decompression for dysthyroid optic neuropathy in patients with Graves' orbitopathy (GO). METHODS: Tendon elongation of the medial rectus muscle (MR) was performed in our institution using an interponate of bovine pericardium in 60 patients (27 underwent unilateral and 33 bilateral surgery)...
March 20, 2018: Strabismus
Catherine L Forse, Dushanthi Pinnaduwage, Shelley B Bull, Anna Marie Mulligan, Irene L Andrulis
The proper handling of unstained paraffin slides for immunohistochemistry has been a matter of debate, with several studies demonstrating loss of antigenicity with prolonged storage at room temperature, 4°C and -20°C. The purpose of this study was to determine whether long-term storage of unstained slides at -80°C would impact the staining intensity and expression distribution of markers used to molecularly subtype breast cancer specimens [estrogen receptor (ER), human epidermal growth factor receptor 2 (HER2), cytokeratin 5 (CK5), epidermal growth factor receptor (EGFR), and Ki67]...
March 17, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
J Carlos Rodríguez-Cabello, I González de Torre, A Ibañez-Fonzeca, M Alonso
Wound healing is a complex process that, in healthy tissues, starts immediately after the injury. Even though it is a natural well-orchestrated process, large trauma wounds, or injuries caused by acids or other chemicals, usually produce a non-elastic deformed tissue that not only have biological reduced properties but a clear aesthetic effect. One of the main drawbacks of the scaffolds used for wound dressing is the lack of elasticity, driving to non-elastic and contracted tissues. In the last decades, elastin based materials have gained in importance as biomaterials for tissue engineering applications due to their good cyto- and bio-compatibility, their ease handling and design, production and modification...
March 15, 2018: Advanced Drug Delivery Reviews
Karen Nørgaard Nielsen, Julia Peics, Tao Ma, Iuliia Karavaeva, Morten Dall, Sabina Chubanava, Astrid L Basse, Oksana Dmytriyeva, Jonas T Treebak, Zachary Gerhart-Hines
OBJECTIVE: The ability of adipose tissue to expand and contract in response to fluctuations in nutrient availability is essential for the maintenance of whole-body metabolic homeostasis. Given the nutrient scarcity that mammals faced for millions of years, programs involved in this adipose plasticity were likely evolved to be highly efficient in promoting lipid storage. Ironically, this previously advantageous feature may now represent a metabolic liability given the caloric excess of modern society...
March 7, 2018: Molecular Metabolism
Ondrej Kuda, Marie Brezinova, Jan Silhavy, Vladimir Landa, Vaclav Zidek, Chandra Dodia, Franziska Kreuchwig, Marek Vrbacky, Laurence Balas, Thierry Durand, Norbert Hübner, Aron B Fisher, Jan Kopecky, Michal Pravenec
Fatty acid esters of hydroxy fatty acids (FAHFAs) are lipid mediators with promising anti-diabetic and anti-inflammatory properties that are formed in white adipose tissue (WAT) via de novo lipogenesis, but their biosynthetic enzymes are unknown. Using a combination of lipidomics in WAT, QTL mapping and correlation analyses in rat BXH/HXB recombinant inbred strains, and response to oxidative stress in murine models, we elucidated the potential pathway of biosynthesis of several FAHFAs.Comprehensive analysis of WAT samples identified ∼160 regioisomers documenting the complexity of this lipid class...
March 16, 2018: Diabetes
Anaïs Briot, Pauline Decaunes, Fanny Volat, Chloé Belles, Muriel Coupaye, Séverine Ledoux, Anne Bouloumié
OBJECTIVE: Adipose tissue (AT) dysfunction associated with obesity or aging is a major cause for lipid redistribution and the progression of cardiometabolic disorders. Our goal is to decipher the contribution of human AT microvascular endothelial cells (ECs) in the maintenance of fatty acid (FA) fluxes and the impact of senescence on their function. APPROACH AND RESULTS: We used freshly isolated primary microvascular ECs from human AT. Our data identified the endothelial FA handling machinery including FATPs (FA transport proteins) FATP1, FATP3, FATP4, and CD36 as well as FABP4 (FA binding protein 4)...
March 15, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
Tao Liu, Karin D Rodland, Richard D Smith
Aberrant degradation of proteins is associated with many pathological states, including cancers. Mass spectrometric analysis of the tumor peptidome has the potential to provide biological insights on proteolytic processing in cancer. However, attempts to use the tumors peptidome information in cancer research have been fairly limited to date, largely due to the lack of effective approaches for robust peptidomics identification and quantification, and the prevalence of confounding factors and biases associated with sample handling and processing...
2018: Vitamins and Hormones
Julien Ternacle, Romain Gallet, Annabelle Nguyen, Jean-François Deux, Antonio Fiore, Emmanuel Teiger, Jean-Luc Dubois-Randé, Elisabeth Riant, Pascal Lim
Percutaneous approaches to treat structural heart diseases are growing in number and complexity. Multimodality imaging is essential for planning and monitoring such interventions. The combination of three-dimensional transoesophageal echocardiography with fluoroscopy is the cornerstone of interventional imaging. However, these two modalities are displayed on separate screens, and are handled by different physicians, which requires a complex mental reconstruction for the interventional team. To overcome this issue, echocardiographic-fluoroscopic fusion imaging has been introduced recently in clinical practice...
March 11, 2018: Archives of Cardiovascular Diseases
Alona Zer, Jean Claude Cutz, Harman Sekhon, David M Hwang, Christina Sit, Manjula Maganti, Mike Sung, Matthew Binnie, Anthony Brade, Tae Bong Chung, Suzanne Kamel-Reid, Paul Narinder, Ming S Tsao, Tom Waddell, Gilda da Cunha Santos, Milan Patel, Ron F Carter, Natasha B Leighl
BACKGROUND: Molecular testing in advanced lung cancer is standard in guiding treatment selection. However, population-wide implementation of testing remains a challenge. We developed a knowledge translation intervention to improve understanding among diagnostic specialists about molecular testing and appropriate diagnostic sampling in lung cancer. METHODS: Specialty-specific education programs were developed from existing literature and input from Canadian leaders in lung pathology, respirology, interventional radiology, thoracic surgery, radiation and medical oncology...
March 10, 2018: Journal of Thoracic Oncology
Ana B Silva, Ana S Bastos, Celine I L Justino, João P da Costa, Armando C Duarte, Teresa A P Rocha-Santos
Microplastics can be present in the environment as manufactured microplastics (known as primary microplastics) or resulting from the continuous weathering of plastic litter, which yields progressively smaller plastic fragments (known as secondary microplastics). Herein, we discuss the numerous issues associated with the analysis of microplastics, and to a less extent of nanoplastics, in environmental samples (water, sediments, and biological tissues), from their sampling and sample handling to their identification and quantification...
August 9, 2018: Analytica Chimica Acta
Alexis Viel, Jérôme Henri, Salim Bouchène, Julian Laroche, Jean-Guy Rolland, Jacqueline Manceau, Michel Laurentie, William Couet, Nicolas Grégoire
PURPOSE: The objective was the development of a whole-body physiologically-based pharmacokinetic (WB-PBPK) model for colistin, and its prodrug colistimethate sodium (CMS), in pigs to explore their tissue distribution, especially in kidneys. METHODS: Plasma and tissue concentrations of CMS and colistin were measured after systemic administrations of different dosing regimens of CMS in pigs. The WB-PBPK model was developed based on these data according to a non-linear mixed effect approach and using NONMEM software...
March 12, 2018: Pharmaceutical Research
Gottfried Martin, David Conrad, Bertan Cakir, Günther Schlunck, Hansjürgen T Agostini
PURPOSE: Retinal vein occlusion (RVO) has been investigated in several laser-induced animal models using pigs, rabbits and rats. However, laser-induced RVO has been rarely reported in mice, despite the impressive number of available mutants, ease of handling and cost effectiveness. The aim of this study was to further assess the feasibility of a RVO mouse model for gene expression analysis and its possible use to investigate effects of hypoxia. METHODS: C57Bl/6J mice were injected with eosin Y for photo-sensitization...
2018: PloS One
Naruhiro Matsufuji
Variation in the relative biological effectiveness (RBE) within the irradiation field of a carbon beam makes carbon-ion radiotherapy unique and advantageous in delivering the therapeutic dose to a deep-seated tumor, while sparing surrounding normal tissues. However, it is crucial to consider the RBE, not only in designing the dose distribution during treatment planning, but also in analyzing the clinical response retrospectively. At the National Institute of Radiological Sciences, the RBE model was established based on the response of human salivary gland cells...
March 8, 2018: Journal of Radiation Research
Anber Naqvi, Abdul Qadir, Adeel Mahmood, Mujtaba Baqar, Iqra Aslam, Farhan Sajid, Mehvish Mumtaz, Jun Li, Gan Zhang
The present study biomonitored the placental polychlorinated biphenyl (PCB) concentrations in women from Punjab Province, Pakistan, that provides the pioneer data for occurrence and body burden of PCBs in placental tissues from South Asian women. The ∑34 PCB concentrations in placental tissues were ranged from 20.2 to 115.98 ng/g lipid weight (lip. wt.), with predominance of tetra-PCB (54.67%). The levels of ∑8 DL-PCBs and ∑6 -indicator PCBs were ranged from 2.03 to 27.64 ng/g (lip. wt.) and 1.71 to 30...
March 11, 2018: Environmental Science and Pollution Research International
David L Diehl, Shaffer R S Mok, Harshit S Khara, Amitpal S Johal, H Lester Kirchner, Fan Lin
Background and study aims:  Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) or biopsy (FNB) is an indispensable diagnostic tool. Improvements in needling technique have led to increasing tissue yields. Blood clogging of the needle can cause difficulties with specimen handling and stylet passage, which improves when the needle is primed with heparin before use. However, the effect of heparin on cytology, histology or immunochemistry (IHC) of FNA and FNB specimens is unknown...
March 2018: Endoscopy International Open
Darren K Patten, Giacomo Corleone, Luca Magnani
Chromatin immunoprecipitation coupled with high-throughput sequencing (ChIP-seq) has become an essential tool for epigenetic scientists. ChIP-seq is used to map protein-DNA interactions and epigenetic marks such as histone modifications at the genome-wide level. Here we describe a complete ChIP-seq laboratory protocol (tailored toward processing tissue samples as well as cell lines) and the bioinformatic pipelines utilized for handling raw sequencing files through to peak calling.
2018: Methods in Molecular Biology
Tian Li, Yafeng Shen, Li Su, Xiaoyan Fan, Fangxing Lin, Xuting Ye, Dianer Ding, Ying Tang, Yang Yongji, Changhai Lei, Shi Hu
Post-ischemic heart failure is a major cause of death worldwide. Reperfusion of infarcted heart tissue after myocardial infarction has been an important medical intervention to improve outcomes. However, disturbances in Ca2+ and redox homeostasis at the cellular level caused by ischemia/reperfusion remain major clinical challenges. In this study, we investigated the potential of adeno-associated virus (AAV)-9-mediated cardiac expression of a Type-2 ryanodine receptor (RyR2) degradation-associated gene, Presenilin 1 (PSEN1), to combat post-ischemic heart failure...
March 9, 2018: Journal of Drug Targeting
Lobat Tayebi, Morteza Rasoulianboroujeni, Keyvan Moharamzadeh, Thafar K D Almela, Zhanfeng Cui, Hua Ye
Three-dimensional (3D) printing is currently being intensely studied for a diverse set of applications, including the development of bioengineered tissues, as well as the production of functional biomedical materials and devices for dental and orthopedic applications. The aim of this study was to develop and characterize a 3D-printed hybrid construct that can be potentially suitable for guided tissue regeneration (GTR). For this purpose, the rheology analyses have been performed on different bioinks and a specific solution comprising 8% gelatin, 2% elastin and 0...
March 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Li Wang, Gang Li, Ehsan Adeli, Mingxia Liu, Zhengwang Wu, Yu Meng, Weili Lin, Dinggang Shen
Tissue segmentation of infant brain MRIs with risk of autism is critically important for characterizing early brain development and identifying biomarkers. However, it is challenging due to low tissue contrast caused by inherent ongoing myelination and maturation. In particular, at around 6 months of age, the voxel intensities in both gray matter and white matter are within similar ranges, thus leading to the lowest image contrast in the first postnatal year. Previous studies typically employed intensity images and tentatively estimated tissue probabilities to train a sequence of classifiers for tissue segmentation...
March 8, 2018: Human Brain Mapping
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