keyword
MENU ▼
Read by QxMD icon Read
search

Tissue Preparation techniques

keyword
https://www.readbyqxmd.com/read/28936651/in-vivo-ploidy-determination-of-arabidopsis-thaliana-male-and-female-gametophytes
#1
Burcu Nur Keçeli, Nico De Storme, Danny Geelen
Organ- or tissue-specific ploidy level determination is often used for answering biological, molecular, genetic, or evolutionary questions in plant sciences. However, current techniques for ploidy determination either cannot provide information on single cell level, require destructive sample preparation, or are laborious and time-consuming. Here, we present a new approach developed in Arabidopsis thaliana, which is not only less labor intensive but also allows in vivo ploidy determination on single cell level...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28936647/3d-imaging-of-whole-mount-ovules-at-cellular-resolution-to-study-female-germline-development-in-rice
#2
Ethel Mendocilla-Sato, Wenjing She, Célia Baroux
Recent advances in fluorescence-based staining of cellular compartments coupled with confocal microscopy imaging have allowed the visualization of three-dimensional (3D) structures with cellular resolution in various intact plant tissues and species. Such approaches are of particular interest for the analysis of the reproductive lineage in plants including the meiotic precursor cells deeply embedded within the ovary of the gynoecium enclosed in the flower. Yet, their relative inaccessibility and the lack of optical clarity of plant tissues prevent robust staining and imaging across several cell layers...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28934809/ct-and-mri-techniques-for-imaging-around-orthopedic-hardware
#3
Thuy Duong Do, Reto Sutter, Stephan Skornitzke, Marc-André Weber
Orthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-of-the-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts...
September 21, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28928083/preparation-and-characterization-of-a-high-affinity-monoclonal-antibody-against-human-epididymis-protein-4
#4
Yunlong Shen, Yuxi Wang, Xiaohua Jiang, Liang Lu, Chengdi Wang, Wenxin Luo, Yongxia Zhang, Pei Li, Zhengwei Du, Tengfei Dai, Congcong Wu, Aiping Fang, Yuqin Yao, Qian Peng, Jinliang Yang
Human epididymis protein-4 (HE4) may serve as a putative biomarker for the early diagnosis, therapy and especially prognosis of ovarian, lung and breast cancer. Detection and targeting of HE4 using the anti-HE4 antibody could be one of the effective strategies for the cancer diagnosis and treatment in clinical practice. In this study, a high-efficiency expression system was established to purify recombinant HE4. We obtained high purity HE4 in 400 mg quantity from 1 L culture supernatant of HEK293F cells. CCK-8 and cell cycle assays indicated that the purified recombinant HE4 protein could promote SKOV3 cell cycle and proliferation at the concentration of 0...
September 16, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28924666/brain-slice-staining-and-preparation-for-three-dimensional-super-resolution-microscopy
#5
Christopher L German, Manasa V Gudheti, Annette E Fleckenstein, Erik M Jorgensen
Localization microscopy techniques-such as photoactivation localization microscopy (PALM), fluorescent PALM (FPALM), ground state depletion (GSD), and stochastic optical reconstruction microscopy (STORM)-provide the highest precision for single-molecule localization currently available. However, localization microscopy has been largely limited to cell cultures due to the difficulties that arise in imaging thicker tissue sections. Sample fixation and antibody staining, background fluorescence, fluorophore photoinstability, light scattering in thick sections, and sample movement create significant challenges for imaging intact tissue...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28921443/polyester-based-nanoparticles-for-the-encapsulation-of-monoclonal-antibodies
#6
Flávia Sousa, Pedro Fonte, Andreia Cruz, Patrick J Kennedy, Inês Mendes Pinto, Bruno Sarmento
Aliphatic polyesters have been widely explored for biomedical applications (e.g., drug delivery systems, biomedical devices, and tissue engineering). Recently, polyesters have been used in nanoparticle formulations for the controlled release of monoclonal antibodies (mAbs) for the enhanced efficacy of antibody-based therapy. Polyester-based nanoparticles for mAb delivery provide decreased antibody dosage, increased antibody stability and protection and longer therapeutic action, ultimately translating to an increased therapeutic index...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28917909/development-of-poly-1-8-octanediol-citrate-chitosan-blend-films-for-tissue-engineering-applications
#7
Ehsan Zeimaran, Sara Pourshahrestani, Belinda Pingguan-Murphy, Daniel Kong, Sangeetha Vasudevaraj Naveen, Tunku Kamarul, Nahrizul Adib Kadri
Blends of poly (1, 8-octanediol citrate) (POC) and chitosan (CS) were prepared through solution casting technique. Films with different component fractions (POC/CS: 100/0, 90/10, 80/20, 70/30, 60/40, and 0/100) were successfully prepared and characterized for their mechanical, thermal, structural and morphological properties as well as biocompatibility. The incorporation of CS to POC significantly increased tensile strength and elastic modulus and presented limited influences on pH variation which is important to the biocompatibility of biomaterial implants...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28914404/development-and-characterization-of-hybrid-tubular-structure-of-plcl-porous-scaffold-with-hmscs-ecs-cell-sheet
#8
Azizah Intan Pangesty, Takaaki Arahira, Mitsugu Todo
Tissue engineering offers an alternate approach to providing vascular graft with potential to grow similar with native tissue by seeding autologous cells into biodegradable scaffold. In this study, we developed a combining technique by layering a sheet of cells onto a porous tubular scaffold. The cell sheet prepared from co-culturing human mesenchymal stem cells (hMSCs) and endothelial cells (ECs) were able to infiltrate through porous structure of the tubular poly (lactide-co-caprolactone) (PLCL) scaffold and further proliferated on luminal wall within a week of culture...
September 15, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28913879/short-t2-imaging-using-a-3d-double-adiabatic-inversion-recovery-prepared-ultrashort-echo-time-cones-3d-dir-ute-cones-sequence
#9
Ya-Jun Ma, Yanchun Zhu, Xing Lu, Michael Carl, Eric Y Chang, Jiang Du
PURPOSE: To investigate high contrast imaging of short T2 tissues with a three-dimensional double adiabatic inversion recovery prepared ultrashort echo time Cones (3D DIR-UTE-Cones) sequence. METHODS: The sequence used two sequential adiabatic inversion pulses to suppress signals from long T2 tissues, followed by multispoke UTE acquisition to detect signals from short T2 tissues. The two adiabatic inversion pulses are identical with a center frequency located at the water peak, but the spectral width is broad enough to cover both water and fat frequencies...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28913170/comparison-of-tissue-processing-methods-for-microvascular-visualization-in-axolotls
#10
Rodrigo Montoro, Renee Dickie
The vascular system, the pipeline for oxygen and nutrient delivery to tissues, is essential for vertebrate development, growth, injury repair, and regeneration. With their capacity to regenerate entire appendages throughout their lifespan, axolotls are an unparalleled model for vertebrate regeneration, but they lack many of the molecular tools that facilitate vascular imaging in other animal models. The determination of vascular metrics requires high quality image data for the discrimination of vessels from background tissue...
2017: MethodsX
https://www.readbyqxmd.com/read/28911768/natural-isotope-abundance-in-metabolites-techniques-and-kinetic-isotope-effect-measurement-in-plant-animal-and-human-tissues
#11
Illa Tea, Guillaume Tcherkez
The natural isotope abundance in bulk organic matter or tissues is not a sufficient base to investigate physiological properties, biosynthetic mechanisms, and nutrition sources of biological systems. In fact, isotope effects in metabolism lead to a heterogeneous distribution of (2)H, (18)O, (13)C, and (15)N isotopes in metabolites. Therefore, compound-specific isotopic analysis (CSIA) is crucial to biological and medical applications of stable isotopes. Here, we review methods to implement CSIA for (15)N and (13)C from plant, animal, and human samples and discuss technical solutions that have been used for the conversion to CO2 and N2 for IRMS analysis, derivatization and isotope effect measurements...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28910208/immunohistochemical-and-immunocytochemical-findings-associated-with-marek-s-disease-virus-in-naturally-infected-laying-hens
#12
O Yavuz, H Erer
We compared immunohistochemical (IHC) staining of tissue sections of liver, kidney, spleen, lung, proventriculus, sciatic nerve, bursa of Fabricius, brain, heart, intestine and skin; immunocytochemical (ICC) staining of peripheral blood samples and touch preparations of liver, spleen and kidney of laying hens naturally infected with Marek's disease (MD) virus. We used one hundred and fifty 5-17-week-old commercial hens. IHC and ICC staining were performed using polymer-based techniques. IHC staining exhibited mostly free immunopositive reactions in tumor cells and in the cytoplasm of the parenchymal cells of liver, kidney, spleen and bursa of Fabricius...
September 14, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28905812/carbon-fiber-on-polyimide-ultra-microelectrodes
#13
Wintrop F Gillis, Charles A Lissandrello, Jun Shen, Ben W Pearre, Alket Mertiri, Felix Deku, Stuart Cogan, Bradley J Holinski, Daniel J Chew, Alice E White, Timothy M Otchy, Timothy Gardner
OBJECTIVE: Most preparations for making neural recordings degrade over time and eventually fail due to insertion trauma and reactive tissue response. The magnitudes of these responses are thought to be related to the electrode size (specifically, the cross-sectional area), the relative stiffness of the electrode, and the degree of tissue tolerance for the material. Flexible carbon fiber ultra-microelectrodes have a much smaller cross-section than traditional electrodes and low tissue reactivity, and thus may enable improved longevity of neural recordings in the central and peripheral nervous systems...
September 14, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28904897/peyronie-s-graft-surgery-tips-and-tricks-from-the-masters-in-andrologic-surgery
#14
Georgios Hatzichristodoulou, Peter Tsambarlis, Hubert Kübler, Laurence A Levine
BACKGROUND: Grafting techniques in the surgical management of Peyronie's disease (PD) are challenging, especially in inexperienced hands. In order to improve surgical outcomes the urologist should follow a standard surgical approach, preferably of an established and reliable grafting technique. The aim of this study is to provide tips and tricks for graft surgery for PD. METHODS: This report offers a step-by-step tutorial for grafting techniques in PD, especially for the Sealing technique and the partial plaque excision and grafting (PEG) procedure...
August 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28902098/repair-of-the-thumb-ulnar-collateral-ligament-with-suture-tape-augmentation
#15
Anthony F De Giacomo, Steven S Shin
One of the most commonly injured structures of the thumb metacarpophalangeal (MCP) joint is the ulnar collateral ligament (UCL). An acute injury of this ligament is often amenable to primary repair. Despite the favorable outcomes of primary repair, the thumb is often restricted during initial healing of the ligament with immobilization and delayed rehabilitation. We present a novel technique to augment the repair of the UCL with suture tape to provide immediate biomechanical support and strength during the critical time of ligament healing...
September 8, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28900710/coupling-matrix-assisted-ionization-with-high-resolution-mass-spectrometry-and-electron-transfer-dissociation-to-characterize-intact-proteins-and-post-translational-modifications
#16
Bingming Chen, Christopher B Lietz, Lingjun Li
Matrix-assisted ionization (MAI) is a recently developed ionization technique that produces multiply charged ions on either electrospray ionization (ESI) or matrix-assisted laser desorption/ionization (MALDI) platform without the need of high voltage or laser ablation. In this study, MAI has been coupled to a high resolution accurate mass (HRAM) hybrid instrument, the Orbitrap Elite mass spectrometer, with electron transfer dissociation (ETD) module for fast peptide and intact protein characterization. The softness of MAI process preserves labile post-translational modifications (PTM) and allows fragmentation and localization by ETD...
September 12, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28900598/cationic-pegylated-polycaprolactone-nanoparticles-carrying-post-operation-docetaxel-for-glioma-treatment
#17
Cem Varan, Erem Bilensoy
Background: Brain tumors are the most common tumors among adolescents. Although some chemotherapeutics are known to be effective against brain tumors based on cell culture studies, the same effect is not observed in clinical trials. For this reason, the development of drug delivery systems is important to treat brain tumors and prevent tumor recurrence. The aim of this study was to develop core-shell polymeric nanoparticles with positive charge by employing a chitosan coating. Additionally, an implantable formulation for the chemotherapeutic nanoparticles was developed as a bioadhesive film to be applied at the tumor site following surgical operation for brain glioma treatment...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28898917/technical-aspects-of-endoscopic-ultrasound-eus-guided-sampling-in-gastroenterology-european-society-of-gastrointestinal-endoscopy-esge-technical-guideline-march-2017
#18
Marcin Polkowski, Christian Jenssen, Philip Kaye, Silvia Carrara, Pierre Deprez, Angels Gines, Gloria Fernández-Esparrach, Pierre Eisendrath, Guruprasad P Aithal, Paolo Arcidiacono, Marc Barthet, Pedro Bastos, Adele Fornelli, Bertrand Napoleon, Julio Iglesias-Garcia, Andrada Seicean, Alberto Larghi, Cesare Hassan, Jeanin E van Hooft, Jean-Marc Dumonceau
For routine EUS-guided sampling of solid masses and lymph nodes (LNs) ESGE recommends 25G or 22G needles (high quality evidence, strong recommendation); fine needle aspiration (FNA) and fine needle biopsy (FNB) needles are equally recommended (high quality evidence, strong recommendation).When the primary aim of sampling is to obtain a core tissue specimen, ESGE suggests using 19G FNA or FNB needles or 22G FNB needles (low quality evidence, weak recommendation).ESGE recommends using 10-mL syringe suction for EUS-guided sampling of solid masses and LNs with 25G or 22G FNA needles (high quality evidence, strong recommendation) and other types of needles (low quality evidence, weak recommendation)...
September 12, 2017: Endoscopy
https://www.readbyqxmd.com/read/28892612/medium-chain-length-polyhydroxyalkanoate-copolymer-modified-by-bacterial-cellulose-for-medical-devices
#19
Denis Mihaela Panaitescu, Irina Lupescu, Adriana Nicoleta Frone, Ioana Chiulan, Cristian Andi Nicolae, Vlad Tofan, Amalia Stefaniu, Raluca Somoghi, Roxana Trusca
Medium chain-length PHAs (mPHAs) are flexible elastomeric biopolymers with valuable properties for biomedical applications like artificial arteries and other medical implants. However, an environmentally friendly and high productivity process together with the tuning of the mechanical and biological properties of mPHAs are mandatory for this purpose. Here, for the first time, a melt processing technique was applied for the preparation of bionanocomposites starting from poly(3-hydroxyoctanoate) (PHO) and bacterial cellulose nanofibers (BC)...
September 11, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28888700/surgical-repair-of-rectovaginal-fistula-using-the-modified-martius-procedure-a-step-by-step-guide
#20
Dan Wang, Juan Chen, Lan Zhu, Mingchen Sang, Fan Yu, Qing Zhou
STUDY OBJECTIVE: to demonstrate the surgical repair of rectovaginal fistula by the modified Martius procedure. DESIGN: step by step presentation of the procedure using video. SETTING: Rectovaginal fistula (RVF) is abnormal epithelialized connections between the vagina and rectum. Causes of rectovaginal fistula include obstetrical trauma, Crohn disease, pelvic irradiation and postsurgical complications. Many surgical interventions have been developed, from laparoscopic technique to muscle transposition and even rectal resection...
September 6, 2017: Journal of Minimally Invasive Gynecology
keyword
keyword
110727
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"