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Tissue handling

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https://www.readbyqxmd.com/read/29330730/scaffold-free-tissue-engineering-for-injured-joint-surface-restoration
#1
REVIEW
Kazunori Shimomura, Wataru Ando, Hiromichi Fujie, David A Hart, Hideki Yoshikawa, Norimasa Nakamura
Articular cartilage does not heal spontaneously due to its limited healing capacity, and thus effective treatments for cartilage injuries has remained challenging. Since the first report by Brittberg et al. in 1994, autologous chondrocyte implantation (ACI) has been introduced into the clinic. Recently, as an alternative for chondrocyte-based therapy, mesenchymal stem cell (MSC)-based therapy has received considerable research attention because of the relative ease in handling for tissue harvest, and subsequent cell expansion and differentiation...
January 5, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29324868/effects-of-pulsed-electromagnetic-field-pemf-on-the-tensile-biomechanical-properties-of-diabetic-wounds-at-different-phases-of-healing
#2
Harry M C Choi, Alex K K Cheing, Gabriel Y F Ng, Gladys L Y Cheing
The present study investigated the effects of pulsed electromagnetic field (PEMF) on the tensile biomechanical properties of diabetic wounds at different phases of healing. Two intensities of PEMF were adopted for comparison. We randomly assigned 111 10-week-old male streptozotocin-induced diabetic Sprague-Dawley rats to two PEMF groups and a sham control group. Six-millimetre biopsy punched full thickness wounds were made on the lateral side of their hindlimbs. The PEMF groups received active PEMF delivered at 25 Hz with intensity of either 2 mT or 10 mT daily, while the sham group was handled in a similar way except they were not exposed to PEMF...
2018: PloS One
https://www.readbyqxmd.com/read/29323066/familiar-trespassers-in-histopathology-an-obstacle-in-diagnosis-a-single-blind-study
#3
P Shashikala, G M Sreevidyalatha, Sonam S Nandyal, Gowda Kavita Umapathy
BACKGROUND: Histopathologists encounter strange structures in tissue sections that appear unrelated to tissues, and these artifacts may be misinterpreted and misdiagnosed as pathological lesions. These substances may either be present within the tissues or can get implanted into tissue during biopsy procedure or laboratory handling or processing. AIMS: The aim of this study is to observe the microscopic appearance of different abnormal structures like commonly implanted food particles or easily incorporated substances during tissue processing with their probable histological misdiagnosis...
October 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29321476/sample-handling-of-gastric-tissue-and-o-glycan-alterations-in-paired-gastric-cancer-and-non-tumorigenic-tissues
#4
Barbara Adamczyk, Chunsheng Jin, Karol Polom, Pedro Muñoz, Miguel A Rojas-Macias, David Zeeberg, Mats Borén, Franco Roviello, Niclas G Karlsson
Sample collection, handling and storage are the most critical steps for ensuring the highest preservation of specimens. Pre-analytical variability can influence the results as protein signatures alter rapidly after tissue excision or during long-term storage. Hence, we evaluated current state-of-the-art biobank preservation methods from a glycomics perspective and analyzed O-glycan alterations occurring in the gastric cancer tissues. Paired tumor and adjacent normal tissue samples were obtained from six patients undergoing gastric cancer surgery...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320637/rejuvenating-regenerative-medicine-regulation
#5
R Alta Charo, Douglas Sipp
The Food and Drug Administration (FDA) recently made long-awaited progress toward protecting patients from interventions involving human cell- and tissue-based products (HCT/P) of unknown safety and efficacy. By clarifying its position on the handling and therapeutic use of cells, the agency has..
January 10, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29315596/relationships-between-tyrosine-phenylalanine-chlorogenic-acid-and-ascorbic-acid-concentrations-and-blackspot-biochemical-potential-and-blackspot-susceptibility-in-stored-russet-potatoes
#6
Aymeric Goyer, Julien Pellé
BACKGROUND: Blackspot in potato is an internal tissue discoloration that occurs during handling and transport of potato tubers. Blackspot is cosmetically undesirable and represents a huge economic cost for the potato industry. The aim of this study was to test whether concentrations of certain metabolites in the potato tuber cortex could predict blackspot susceptibility. RESULTS: Seven russet potato varieties were stored for eight months at 8.80 C. Stored tubers were subjected to mechanical impact and evaluated for blackspot susceptibility...
January 9, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29303600/aquaporin-expression-in-the-fetal-porcine-urinary-tract-changes-during-gestation
#7
L K Jakobsen, K Trelborg, P S Kingo, S Hoyer, K-E Andersson, J C Djurhuus, R Norregaard, L H Olsen
The expression of aquaporins (AQPs) in the fetal porcine urinary tract and its relation to gestational age has not been established. Tissue samples from the renal pelvis, ureter, bladder and urethra were obtained from porcine fetuses. Samples were examined by RT-PCR (AQPs 1-11), QPCR (AQPs positive on RT-PCR), and immunohistochemistry. Bladder samples were additionally examined by Western blotting. RNA was extracted from 76 tissue samples obtained from 19 fetuses. Gestational age was 60 (n=11) or 100 days (n=8)...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29301848/physiologic-pathologic-and-therapeutic-paracrine-modulation-of-cardiac-excitation-contraction-coupling
#8
REVIEW
Joshua Mayourian, Delaine K Ceholski, David M Gonzalez, Timothy J Cashman, Susmita Sahoo, Roger J Hajjar, Kevin D Costa
Cardiac excitation-contraction coupling (ECC) is the orchestrated process of initial myocyte electrical excitation, which leads to calcium entry, intracellular trafficking, and subsequent sarcomere shortening and myofibrillar contraction. Neurohumoral β-adrenergic signaling is a well-established mediator of ECC; other signaling mechanisms, such as paracrine signaling, have also demonstrated significant impact on ECC but are less well understood. For example, resident heart endothelial cells are well-known physiological paracrine modulators of cardiac myocyte ECC mainly via NO and endothelin-1...
January 5, 2018: Circulation Research
https://www.readbyqxmd.com/read/29300899/tissue-distribution-of-suvorexant-in-three-forensic-autopsy-cases
#9
Brian Waters, Kenji Hara, Natsuki Ikematsu, Mio Takayama, Aya Matsusue, Masayuki Kashiwagi, Shin-Ichi Kubo
Suvorexant (Belsomra®) is a relatively new insomnia medication that has been available in USA and Japan since 2014. It is a dual orexin receptor antagonist that promotes sleep by inhibiting the binding of orexin neurons to the OX1R and OX2R receptors. In this report, we describe the detection and quantitation of suvorexant from the postmortem specimens of three separate autopsy cases handled by our department. Suvorexant was identified by fast gas chromatography/mass spectrometry during routine screening, and quantitated by a fully validated liquid chromatography-tandem mass spectroscopy method...
December 28, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29299822/necrostatin-1-protects-against-paraquat-induced-cardiac-contractile-dysfunction-via-rip1-rip3-mlkl-dependent-necroptosis-pathway
#10
Liping Zhang, Qiming Feng, Teng Wang
Paraquat is a highly toxic prooxidant that triggers oxidative stress and multi-organ failure including that of the heart. To date, effective treatment of paraquat toxicity is still not established. Necroptosis, a newly discovered form of programmed cell death, was recently shown to be strongly associated with cardiovascular disease. Receptor interaction proteins 1 (RIP1), receptor interaction proteins 3 (RIP3), and mixed lineage kinase domain like (MLKL) are key proteins in the necroptosis pathway. Necrostatin-1 (Nec-1) is a specific inhibitor of necroptosis which acts by blocking the interaction between RIP1 and RIP3...
January 3, 2018: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/29298608/resorbable-self-locking-implant-for-lung-lobectomy-through-video-assisted-thoracoscopic-surgery-first-live-animal-application
#11
Rogério Luizari Guedes, Odd Viking Höglund, Juliana Sperotto Brum, Niklas Borg, Peterson Triches Dornbusch
The aim of this pilot test was to test a new self-locking resorbable implant for hilum occlusion during a video-assisted thoracoscopic lung lobectomy in a surviving pig model. Once the thoracic cavity was assessed and structures identified, the right middle lobe and its respective hilum were exposed. The implant was introduced with a semiclosed loop through a working channel and positioned around the pulmonary lobe. Occlusion was performed with a conventional Crile forceps and a laparoscopic Kelly forceps. Lobe section was done with laparoscopic Metzenbaum scissors and tissue removal through the dorsal access...
January 1, 2018: Surgical Innovation
https://www.readbyqxmd.com/read/29296046/the-association-of-serum-leptin-levels-with-metabolic-diseases
#12
REVIEW
Jen-Pi Tsai
Leptin is a 167-amino-acid protein released by white adipose tissue and encoded by the obese gene. It has a role as a negative regulator of appetite control through sending a satiety signal to act on receptors within the hypothalamus. At normal levels, leptin can exert its effects on weight regulation according to white fat mass, induce sodium excretion, maintain vascular tone, and repair the myocardium. Beyond these effects, elevated serum leptin levels have been implicated in the pathogenesis of metabolic syndrome, diabetes mellitus, hypertension, and multiple cardiovascular diseases...
October 2017: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/29295823/the-stress-induced-transcription-factor-nr4a1-adjusts-mitochondrial-function-and-synapse-number-in-prefrontal-cortex
#13
Freddy Jeanneteau, Christian Barrère, Mariska Vos, Carlie Jm De Vries, Claude Rouillard, Daniel Levesque, Yann Dromard, Marie-Pierre Moisan, Vanja Duric, Tina C Franklin, Ronald S Duman, David A Lewis, Stephen D Ginsberg, Margarita Arango-Lievano
The energetic costs of behavioral chronic stress are unlikely to be sustainable without neuronal plasticity. Mitochondria have the capacity to handle synaptic activity up to a limit before energetic depletion occurs. Protective mechanisms driven by the induction of neuronal genes likely evolved to buffer the consequences of chronic stress on excitatory neurons in prefrontal cortex (PFC), as this circuitry is vulnerable to excitotoxic insults. Little is known about the genes involved in mitochondrial adaptation to the build up of chronic stress...
January 2, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29287774/a-novel-case-of-acox2-deficiency-leads-to-recognition-of-a-third-human-peroxisomal-acyl-coa-oxidase
#14
Sacha Ferdinandusse, Simone Denis, Carlo W T van Roermund, Mary Anne Preece, Janet Koster, Merel S Ebberink, Hans R Waterham, Ronald J A Wanders
Peroxisomal acyl-CoA oxidases catalyze the first step of beta-oxidation of a variety of substrates broken down in the peroxisome. These include the CoA-esters of very long-chain fatty acids, branched-chain fatty acids and the C27-bile acid intermediates. In rat, three peroxisomal acyl-CoA oxidases with different substrate specificities are known, whereas in humans it is believed that only two peroxisomal acyl-CoA oxidases are expressed under normal circumstances. Only three patients with ACOX2 deficiency, including two siblings, have been identified so far, showing accumulation of the C27-bile acid intermediates...
December 26, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29285329/the-flap-recovery-on-the-impacted-lower-third-molar-surgery-comparing-3-different-flap-designs-a-clinical-study
#15
L Ottria, F Luciani, P Piva, A M Alagna, C Arcuri, F N Bartuli
Aim: The purpose of the study was to analyze the healing of the deep and superficial lower first and second molars periodontium, after the surgical extraction of the contiguous impacted third molar, comparing 3 mucoperiosteal flap designs. Materials and methods: 150 patients which had to undergo a impacted lower third molar surgery were enrolled in this study. They were checked from day 0 to day 90, in order to focus on the recovery quality of the soft tissues around the lower second molar, comparing 3 different flap designs...
July 2017: Oral & Implantology
https://www.readbyqxmd.com/read/29280435/transcription-factor-dependent-enhancer-transcription-defines-a-gene-regulatory-network-for-cardiac-rhythm
#16
Xinan H Yang, Rangarajan D Nadadur, Catharina Re Hilvering, Valerio Bianchi, Michael Werner, Stefan R Mazurek, Margaret Gadek, Kaitlyn M Shen, Joseph Aaron Goldman, Leonid Tyan, Jenna Bekeny, Johnathan M Hall, Nutishia Lee, Carlos Perez-Cervantes, Ozanna Burnicka-Turek, Kenneth D Poss, Christopher R Weber, Wouter de Laat, Alexander J Ruthenburg, Ivan P Moskowitz
The noncoding genome is pervasively transcribed. Noncoding RNAs (ncRNAs) generated from enhancers have been proposed as a general facet of enhancer function and some have been shown to be required for enhancer activity. Here we examine the transcription-factor-(TF)-dependence of ncRNA expression to define enhancers and enhancer-associated ncRNAs that are involved in a TF-dependent regulatory network. TBX5, a cardiac TF, regulates a network of cardiac channel genes to maintain cardiac rhythm. We deep sequenced wildtype and Tbx5-mutant mouse atria, identifying ~2600 novel Tbx5-dependent ncRNAs...
December 27, 2017: ELife
https://www.readbyqxmd.com/read/29280350/emerging-biotechnology-applications-of-aqueous-two-phase-systems
#17
REVIEW
Alyne G Teixeira, Rishima Agarwal, Kristin Robin Ko, Jessica Grant-Burt, Brendan M Leung, John P Frampton
Liquid-liquid phase separation between aqueous solutions containing two incompatible polymers, a polymer and a salt, or a polymer and a surfactant, has been exploited for a wide variety of biotechnology applications throughout the years. While many applications for aqueous two-phase systems fall within the realm of separation science, the ability to partition many different materials within these systems, coupled with recent advances in materials science and liquid handling, has allowed bioengineers to imagine new applications...
December 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29246105/the-function-and-evolutionary-significance-of-a-triplicated-na-k-atpase-gene-in-a-toxin-specialized-insect
#18
Jennifer N Lohr, Fee Meinzer, Safaa Dalla, Renja Romey-Glüsing, Susanne Dobler
BACKGROUND: The Na,K-ATPase is a vital animal cell-membrane protein that maintains the cell's resting potential, among other functions. Cardenolides, a group of potent plant toxins, bind to and inhibit this pump. The gene encoding the α-subunit of the pump has undergone duplication events in some insect species known to feed on plants containing cardenolides. Here we test the function of these duplicated gene copies in the cardenolide-adapted milkweed bug, Oncopeltus fasciatus, which has three known copies of the gene: α1A, α1B and α1C...
December 15, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29243229/mirabegron-potential-off-target-effects-and-uses-beyond-the-bladder
#19
REVIEW
Nodi Dehvari, Edilson Dantas da Silva Junior, Tore Bengtsson, Dana S Hutchinson
The ®3 -adrenoceptor was initially an attractive target by several pharmaceutical companies due to its high expression in rodent adipose tissue, where its activation resulted in decreased adiposity and improved metabolic outputs (such as glucose handling) in animal models of obesity and type 2 diabetes. However, several drugs acting at the β3 -adrenoceptor failed in clinical trials. This was thought to be due to their lack of efficacy at the human receptor. Recently mirabegron, a ®3 -adrenoceptor agonist with human efficacy, was approved in North America, Europe, Japan and Australia for the treatment of overactive bladder syndrome...
December 15, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29242870/high-throughput-double-emulsion-based-microfluidic-production-of-hydrogel-microspheres-with-tunable-chemical-functionalities-toward-biomolecular-conjugation
#20
Eric Y Liu, Sukwon Jung, David A Weitz, Hyunmin Yi, Chang-Hyung Choi
Chemically functional hydrogel microspheres hold significant potential in a range of applications including biosensing, drug delivery, and tissue engineering due to their high degree of flexibility in imparting a range of functions. In this work, we present a simple, efficient, and high-throughput capillary microfluidic approach for controlled fabrication of monodisperse and chemically functional hydrogel microspheres via formation of double emulsion drops with an ultra-thin oil shell as a sacrificial template...
December 15, 2017: Lab on a Chip
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