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https://www.readbyqxmd.com/read/28531912/from-bench-to-market-preparing-human-pluripotent-stem-cells-derived-cardiomyocytes-for-various-applications
#1
REVIEW
Sung-Hwan Moon, Daekyeong Bae, Taek-Hee Jung, Eun-Bin Chung, Young-Hoon Jeong, Soon-Jung Park, Hyung-Min Chung
Human cardiomyocytes (CMs) cease to proliferate and remain terminally differentiated thereafter, when humans reach the mid-20s. Thus, any damages sustained by myocardium tissue are irreversible, and they require medical interventions to regain functionality. To date, new surgical procedures and drugs have been developed, albeit with limited success, to treat various heart diseases including myocardial infarction. Hence, there is a pressing need to develop more effective treatment methods to address the increasing mortality rate of the heart diseases...
May 30, 2017: International Journal of Stem Cells
https://www.readbyqxmd.com/read/28531183/a-scoping-review-on-bio-aerosols-in-healthcare-and-the-dental-environment
#2
Charifa Zemouri, Hans de Soet, Wim Crielaard, Alexa Laheij
BACKGROUND: Bio-aerosols originate from different sources and their potentially pathogenic nature may form a hazard to healthcare workers and patients. So far no extensive review on existing evidence regarding bio-aerosols is available. OBJECTIVES: This study aimed to review evidence on bio-aerosols in healthcare and the dental setting. The objectives were 1) What are the sources that generate bio-aerosols?; 2) What is the microbial load and composition of bio-aerosols and how were they measured?; and 3) What is the hazard posed by pathogenic micro-organisms transported via the aerosol route of transmission? METHODS: Systematic scoping review design...
2017: PloS One
https://www.readbyqxmd.com/read/28530835/on-the-formation-of-epitaxially-connected-quantum-dot-solids-nucleation-and-coherent-phase-transition
#3
Kevin Whitham, Tobias Hanrath
The formation of epitaxially connected quantum dot solids involves a complex interplay of interfacial assembly, surface chemistry, and irreversible directed attachment. We describe the basic mechanism in context of a coherent phase transition with distinct nucleation and propagation steps. The proposed mechanism explains how defects in the pre-assembled structure influence nucleation and how basic geometric relationships govern the transformation from hexagonal assemblies of isolated dots to interconnected solids with square symmetry...
May 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28530826/high-speed-atomic-force-microscopy-reveals-loss-of-nuclear-pore-resilience-as-a-dying-code-in-colorectal-cancer-cells
#4
Mahmoud Shaaban Mohamed, Akiko Kobayashi, Azuma Taoka, Takahiro Watanabe-Nakayama, Yosuke Kikuchi, Masaharu Hazawa, Toshinari Minamoto, Yoshihiro Fukumori, Noriyuki Kodera, Takayuki Uchihashi, Toshio Ando, Richard W Wong
Nuclear pore complexes (NPCs) are the sole turnstile implanted in the nuclear envelope (NE), acting as a central nano-regulator of transport between the cytosol and the nucleus. NPCs consist of ~30 proteins, termed nucleoporins. About one-third of nucleoporins harbour natively unstructured, intrinsically disordered phenylalanine-glycine strings (FG-Nups), which engage in transport selectivity. Because the barriers insert deeply in the NPC, they are nearly inaccessible. Several in vitro barrier models have been proposed; however, the dynamic FG-Nups protein molecules themselves are imperceptible in vivo...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28530781/an-unusual-etiology-in-cold-injury-liquefied-petroleum-gas
#5
Emin Kapı, Mehmet Bozkurt, Gaye Taylan Filinte, Samet Vasfi Kuvat, Celal Alioğlu
Cold injury is a condition that causes reversible and irreversible damage when tissues are exposed to cold. This injury occurs due to various etiologies, and the most commonly observed ones include contact with liquefied petroleum gas (LPG) used in households, vehicles, and industry. LPG is a type of gas stored in liquid state under high pressure within cylinders. LPG contains a mixture of propane and butane gases. Direct contact of these gases with the tissues has the potential to cause metabolic, toxic, and respiratory damage...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28529569/advanced-glycation-end-products-influence-oral-cancer-cell-survival-via-bcl-xl-and-nrf-2-regulation-in-vitro
#6
Shun-Yao Ko, Hshin-An Ko, Tzong-Ming Shieh, Tzong-Cherng Chi, Hong-I Chen, Yi-Ting Chen, Ya-Hui Yu, Shu-Han Yang, Shu-Shing Chang
An irreversible non-enzymatic reaction between carbohydrates and proteins results in the formation of advanced glycation end products (AGEs). AGEs have been demonstrated to be a risk factor of complications in patients with diabetes mellitus (DM). Previous studies have suggested that patients with DM exhibit a higher rate of metastasis of oral cancer and a lower cancer-associated survival rate. The receptor for AGEs (RAGE) has been associated with angiogenesis and an increase in cancer malignancy. Previous studies have suggested that AGE-RAGE regulates cell migration via extracellular signal-regulated kinase (ERK) phosphorylation...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28529280/alternative-methods-to-visual-and-radiographic-examinations-for-approximal-caries-detection
#7
Naif Abogazalah, Masatoshi Ando
A shift in caries prevalence from occlusal surfaces to approximal surfaces has been demonstrated by epidemiological studies. Two recent meta-analyses evaluated the performance of visual examination and radiography for carious lesion detection, and reported low sensitivity but high specificity for early approximal caries detection. This suggests that the conventional methods have a higher risk of failing to detect approximal lesions. Consequently, in caries susceptible populations, there is a risk of progression of non-cavitated lesions to irreversible tooth destruction before the lesions are detected...
May 19, 2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28529078/hcsgd-an-integrated-database-of-human-cellular-senescence-genes
#8
Qiongye Dong, Hongqing Han, Xuehui Liu, Lei Wei, Wei Zhang, Zhen Zhao, Michael Q Zhang, Xiaowo Wang
Cellular senescence is an irreversible cell cycle arrest program in response to various exogenous and endogenous stimuli like telomere dysfunction and DNA damage. It has been widely accepted as an anti-tumor program and is also found closely related to embryo development, tissue repair, organismal aging and age-related degenerative diseases. In the past decades, numerous efforts have been made to uncover the gene regulatory mechanisms of cellular senescence. There is a strong demand to integrate these data from various resources into one open platform...
April 29, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28528876/modeling-covalent-modifier-drugs
#9
REVIEW
Ernest Awoonor-Williams, Andrew G Walsh, Christopher N Rowley
In this review, we present a summary of how computer modeling has been used in the development of covalent modifier drugs. Covalent modifier drugs bind by forming a chemical bond with their target. This covalent binding can improve the selectivity of the drug for a target with complementary reactivity and result in increased binding affinities due to the strength of the covalent bond formed. In some cases, this results in irreversible inhibition of the target, but some targeted covalent inhibitor (TCI) drugs bind covalently but reversibly...
May 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28528576/using-non-thermal-irreversible-electroporation-to-create-an-in-vivo-niche-for-exogenous-cell-engraftment
#10
Tammy T Chang, Vivian X Zhou, Boris Rubinsky
The critical shortage of donor organs has spurred investigation of alternative approaches to either generate replacement organs or implant exogenous cells for treatment of end-stage organ failure. Non-thermal irreversible electroporation (NTIRE), which uses brief high electric field pulses to induce irreversible permeabilization of cell membranes, has emerged as a technique for tumor ablation. Here, we introduce a new application for NTIRE that employs in situ cell ablation to create a niche within a solid organ for engraftment of exogenous cells in vivo...
May 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28528498/lipopeptides-produced-by-bacillus-subtilis-as-new-biocontrol-products-against-fusariosis-in-ornamental-plants
#11
Gabriela Mihalache, Tiberius Balaes, Irina Gostin, Marius Stefan, François Coutte, François Krier
In this study, we have investigated the effects of three lipopeptides (fengycin, surfactin and mycosubtilin) produced by different strains of Bacillus subtilis against the phytopathogenic fungi Fusarium oxysporum f. sp. iridacearum, which affects the ornamental bulb plant populations of Iris sp. The antifungal effects were tested using minimum inhibitory concentration assay, determination of mycelium growth and spore germination inhibition rates. Also, in vivo tests on infected rhizomes and scanning electron microscopy were employed...
May 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28528136/the-management-of-the-acute-ischemic-priapism-a-state-of-the-art-review
#12
M Falcone, A Gillo, M Capece, A Raheem, D Ralph, G Garaffa
OBJECTIVE: To review the current literature on early penile prosthesis implantation in patients with refractory ischemic priapism (IP). ACQUISITION OF EVIDENCE: A systematic search for the terms "penile prosthesis", "priapism", "impotence", "fibrosis", "downsized prosthesis cylinders", and "patient satisfaction" has been carried out in PubMed, EMBASE, Cochrane, SCOPUS and Science Citation Index databases. SYNTHESIS OF EVIDENCE: Cavernosal tissue damage in IP is time related...
May 17, 2017: Actas Urologicas Españolas
https://www.readbyqxmd.com/read/28527838/pulp-inflammation-diagnosis-from-clinical-to-inflammatory-mediators-a-systematic-review
#13
REVIEW
Marjorie Zanini, Elisabeth Meyer, Stéphane Simon
INTRODUCTION: Similar to other tissues, the dental pulp mounts an inflammatory reaction as a way to eliminate pathogens and stimulate repair. Pulp inflammation is prerequisite for dentin pulp complex repair and regeneration; otherwise, chronic disease or pulp necrosis occurs. Evaluation of pulp inflammation severity is necessary to predict the clinical success of maintaining pulp vitality. Clinical limitations to evaluating in situ inflammatory status are well-described. A molecular approach that aids clinical distinction between reversible and irreversible pulpitis could improve the success rate of vital pulp therapy...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527728/the-patient-s-experience-of-amputation-due-to-peripheral-arterial-disease
#14
Eva Torbjörnsson, Carin Ottosson, Lena Blomgren, Lennart Boström, Ann-Mari Fagerdahl
It is not uncommon that patients with peripheral arterial disease (PAD) need to undergo a lower limb amputation, with or without previous revascularization attempts. Despite that, the patient's experience of the amputation has been scarcely studied. The aim of this qualitative study was to describe the patient's experience of amputation due to PAD. Thirteen interviews were conducted with vascular patients who had undergone a lower limb amputation at tibia, knee, or femoral level. Data were analyzed with content analysis...
June 2017: Journal of Vascular Nursing: Official Publication of the Society for Peripheral Vascular Nursing
https://www.readbyqxmd.com/read/28527529/image-guided-ablation-of-renal-cell-carcinoma
#15
REVIEW
T M Wah
This review article aims to provide an overview of image-guided ablation of renal cell carcinoma (RCC) since it was first introduced in 1998. This will cover the background and rationale behind its development; an overview of the evidence for current thermal technology, such as heat-based, e.g., radiofrequency ablation (RFA), microwave ablation (MWA), and cold-based energies, e.g., cryoablation used; and summarise the published evidence regarding its treatment efficacy and oncological outcome. In addition, it aims to provide an insight into the potential role of the new non-thermal ablative technology, e...
May 17, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28527484/-syndrome-of-irreversible-lithium-effectuated-neurotoxicity
#16
Ana Luísa Silva, Carolina Ourique, Filipe Martins, Fernando Friões
Lithium has a narrow therapeutic window. Frequent monitoring of both serum levels and clinical signs of toxicity is warranted because toxicity may be present even when concentrations are within the therapeutic range. We report the case of a man with lithium poisoning, with persistent neurologic signs and symptoms even after removal of lithium from circulation - a diagnosis of syndrome of irreversible lithium-effectuated neurotoxicity (SILENT) was made.
February 27, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28526627/dynamic-fatigue-measurement-of-human-erythrocytes-using-dielectrophoresis
#17
Yuhao Qiang, Jia Liu, E Du
Erythrocytes must undergo severe deformation to pass through narrow capillaries and submicronic splenic slits for several hundred thousand times in their normal lifespan. Studies of erythrocyte biomechanics have been mainly focused on cell deformability and rheology measured from a single application of stress and mostly under a static or quasi-static state using classical biomechanical techniques, such as optical tweezers and micropipette aspiration. Dynamic behavior of erythrocytes in response to cyclic stresses that contributes to the membrane failure in blood circulation is not fully understood...
May 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28526534/3-methylglutaconic-aciduria-a-frequent-but-underrecognized-finding-in-carbamoyl-phosphate-synthetase-i-deficiency
#18
Dariusz Rokicki, Magdalena Pajdowska, Joanna Trubicka, Meow-Keong Thong, Elżbieta Ciara, Dorota Piekutowska-Abramczuk, Maciej Pronicki, Roman Sikora, Rijad Haidar, Mariusz Ołtarzewski, Ewa Jabłońska, Premala Muthukumarasamy, Pavai Sthaneswar, Chin-Seng Gan, Małgorzata Krajewska-Walasek, Rosalba Carrozzo, Daniela Verrigni, Michela Semeraro, Cristiano Rizzo, Roberta Taurisano, Bader Alhaddad, Reka Kovacs-Nagy, Tobias B Haack, Carlo Dionisi-Vici, Ewa Pronicka, Saskia B Wortmann
The urea cycle disorder carbamoyl phosphate synthetase I deficiency is an important differential diagnosis in the encephalopathic neonate. This intoxication type inborn error of metabolism often leads to neonatal death or severe and irreversible damage of the central nervous system, even despite appropriate treatment. Timely diagnosis is crucial, but can be difficult on routine metabolite level. Here, we report ten neonates from eight families (finally) diagnosed with CPS1 deficiency at three tertiary metabolic centres...
May 16, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28525591/f4-80-macrophages-contribute-to-clearance-of-senescent-cells-in-the-mouse-postpartum-uterus
#19
Mahiro Egashira, Yasushi Hirota, Ryoko Shimizu-Hirota, Tomoko Saito-Fujita, Hirofumi Haraguchi, Leona Matsumoto, Mitsunori Matsuo, Takehiro Hiraoka, Tomoki Tanaka, Shun Akaeda, Chiaki Takehisa, Mayuko Saito-Kanatani, Kei-Ichiro Maeda, Tomoyuki Fujii, Yutaka Osuga
Cellular senescence, defined as an irreversible cell cycle arrest, exacerbates tissue microenvironment. Our previous study demonstrated that mouse uterine senescent cells are physiologically increased according to gestational days and their abnormal accumulation is linked to the onset of preterm delivery. We hypothesized that there is a mechanism for removal of senescent cells after parturition to maintain uterine function. In the current study, we noted abundant uterine senescent cells and their gradual disappearance in the wild-type postpartum mice...
May 18, 2017: Endocrinology
https://www.readbyqxmd.com/read/28524918/urotensin-ii-peptidomimetic-incorporating-a-non-reducible-1-5-triazole-disulfide-bond-reveals-a-pseudo-irreversible-covalent-binding-mechanism-to-the-urotensin-g-protein-coupled-receptor
#20
Salvatore Pacifico, Aidan Kerckhoffs, Andrew J Fallow, Rachel E Foreman, Remo Guerrini, John McDonald, David G Lambert, Andrew G Jamieson
The urotensin-II receptor (UTR) is a class A GPCR that predominantly binds to the pleiotropic cyclic peptide urotensin-II (U-II). U-II is constrained by a disulfide bridge that induces a β-turn structure and binds pseudo-irreversibly to UTR and is believed to result in a structural rearrangement of the receptor. However, it is not well understood how U-II binds pseudo-irreversibly and the nature of the reorganization of the receptor that results in G-protein activation. Here we describe a series of U-II peptidomimetics incorporating a non-reducible disulfide bond structural surrogate to investigate the feasibility that native U-II binds to the G protein-coupled receptor through disulfide bond shuffling as a mechanism of covalent interaction...
May 19, 2017: Organic & Biomolecular Chemistry
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