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Tissue expander

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https://www.readbyqxmd.com/read/27914244/surgical-treatment-and-histopathological-assessment-of-advanced-cervicovaginal-carcinoma-a-prospective-study-and-retrospective-analysis
#1
Michael Höckel, Benjamin Wolf, Bettina Hentschel, Lars-Christian Horn
BACKGROUND: Standard treatment of advanced cervicovaginal cancer [international federation of gynecology and obstetrics (FIGO) stages II(B), III(A, B), IVA] is (chemo-)radiation excluding the possibility of systematic histopathological assessment of locoregional tumour spread. Laterally extended endopelvic resection (LEER) and therapeutic lymph node dissection (tLND) are novel surgical treatment options for advanced cervicovaginal cancer. METHODS: The therapeutic efficacy of LEER for locally advanced primary and recurrent cervicovaginal cancer was reassessed by an update of the prospective observational trial at the University of Leipzig...
November 30, 2016: European Journal of Cancer
https://www.readbyqxmd.com/read/27913779/comparison-of-proliferative-and-immunomodulatory-potential-of-adipose-derived-mesenchymal-stem-cells-from-young-and-geriatric-cats
#2
Lara B Zajic, Tracy L Webb, Polly Webb, Jonathan W Coy, Steve W Dow, Jessica M Quimby
OBJECTIVES: The objective of this study was to compare the ability of adipose-derived mesenchymal stem cells (aMSC) generated from young vs geriatric cats to proliferate in culture, suppress lymphocyte proliferation and undergo senescence. METHODS: Adipose tissues from five young (<5 years) and six geriatric (>10 years) cats were harvested and cryopreserved for subsequent aMSC isolation and culture. aMSC proliferation in culture was compared via determination of time until passage two and by 3-(4,5-demethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay...
December 2, 2016: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/27913612/mechanisms-in-endocrinology-skeletal-muscle-lipotoxicity-in-insulin-resistance-and-type-2-diabetes-a-causal-mechanism-or-an-innocent-bystander
#3
REVIEW
Charlotte Brøns, Louise Groth Grunnet
Dysfunctional adipose tissue is associated with an increased risk of developing type 2 diabetes (T2D). One characteristic of a dysfunctional adipose tissue is the reduced expandability of the subcutaneous adipose tissue leading to ectopic storage of fat in organs and/or tissues involved in the pathogenesis of T2D that can cause lipotoxicity. Accumulation of lipids in the skeletal muscle is associated with insulin resistance, but the majority of previous studies do not prove any causality. Most studies agree that it is not the intramuscular lipids per se that causes insulin resistance, but rather lipid intermediates such as diacylglycerols, fatty acyl-CoAs and ceramides and that it is the localization, composition and turnover of these intermediates that play an important role in the development of insulin resistance and T2D...
February 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27913222/human-liver-regeneration-in-advanced-cirrhosis-is-organized-by-the-portal-tree
#4
Katalin Dezső, András Rókusz, Edina Bugyik, Armanda Szücs, András Szuák, Bence Dorogi, Mátyás Kiss, Ágnes Nemeskéri, Péter Nagy, Sándor Paku
BACKGROUND&AIMS: In advanced cirrhosis new hepatocytic nodules are generated by budding of ductules in areas of parenchymal extinction. However, the vascular alterations in the areas of parenchymal extinction, the blood supply and the structure of the new hepatocytic nodules have not been analyzed in detail. METHODS: Explanted human cirrhotic livers of three different etiologies and two experimental models of cirrhosis in rats were examined thoroughly. 3D reconstruction of the immunohistochemically stained serial sections and casting of human and experimental cirrhotic livers have been used to reveal the structural organization of the regenerative buds...
November 29, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27911943/enhanced-in-planta-fitness-through-adaptive-mutations-in-efpr-a-dual-regulator-of-virulence-and-metabolic-functions-in-the-plant-pathogen-ralstonia-solanacearum
#5
Anthony Perrier, Rémi Peyraud, David Rengel, Xavier Barlet, Emmanuel Lucasson, Jérôme Gouzy, Nemo Peeters, Stéphane Genin, Alice Guidot
Experimental evolution of the plant pathogen Ralstonia solanacearum, where bacteria were maintained on plant lineages for more than 300 generations, revealed that several independent single mutations in the efpR gene from populations propagated on beans were associated with fitness gain on bean. In the present work, novel allelic efpR variants were isolated from populations propagated on other plant species, thus suggesting that mutations in efpR were not solely associated to a fitness gain on bean, but also on additional hosts...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27911810/in-vivo-bioluminescence-imaging-reveals-copper-deficiency-in-a-murine-model-of-nonalcoholic-fatty-liver-disease
#6
Marie C Heffern, Hyo Min Park, Ho Yu Au-Yeung, Genevieve C Van de Bittner, Cheri M Ackerman, Andreas Stahl, Christopher J Chang
Copper is a required metal nutrient for life, but global or local alterations in its homeostasis are linked to diseases spanning genetic and metabolic disorders to cancer and neurodegeneration. Technologies that enable longitudinal in vivo monitoring of dynamic copper pools can help meet the need to study the complex interplay between copper status, health, and disease in the same living organism over time. Here, we present the synthesis, characterization, and in vivo imaging applications of Copper-Caged Luciferin-1 (CCL-1), a bioluminescent reporter for tissue-specific copper visualization in living animals...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27908502/centralized-capacity-building-training-of-lichtenstein-hernioplasty-in-brazil
#7
Alexandra M Moore, Néha Datta, Justin P Wagner, Alexander D Schroeder, Wolfgang Reinpold, Maurice Y Franciss, Rodrigo A Silva, David C Chen, Charles J Filipi, Sergio Roll
BACKGROUND: In Brazil, access to healthcare varies widely by community. Options for repair of surgically correctable conditions, such as inguinal hernias, are limited. A training program was instituted to expand access to Lichtenstein hernioplasty. METHODS: Between September, 2014 and September, 2015, 3 orders of training series took place in São Paulo, Brazil. Participating surgeons received training and assessments from expert trainers using the Operative Performance Rating Scale (OPRS)...
November 22, 2016: American Journal of Surgery
https://www.readbyqxmd.com/read/27906851/silk-ligation-delay-for-the-random-pattern-flap
#8
Lei Liu, Chen Zhang, Haizhou Tong, Tao Song, Ningbei Yin, Haidong Li, Zhenmin Zhao
OBJECTIVE: The purpose of this study is to explore a silk ligation delay for the expanded and unexpanded random flaps to improve the vascularization and survival length of the flap. METHODS: Marked incision points 2 to 3 cm at every interval along the design line with methylene blue, each incision was about 3 mm long. A subepidermal tunnel was formed on the superfacial layer of dermis between every adjacent incision; another gap was done on the surface of the expander...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906441/ten-years-experience-with-breast-reconstruction-after-salvage-mastectomy-in-previously-irradiated-patients-analysis-of-outcomes-satisfaction-and-well-being
#9
B Cagli, M Barone, E Ippolito, A Cogliandro, S Silipigni, S Ramella, P Persichetti
OBJECTIVE: Reconstruction following mastectomy offers women an opportunity to mollify some of the emotional and aesthetic effects of this devastating disease. PATIENTS AND METHODS: The authors reviewed the files of 83 patients who underwent immediate postmastectomy reconstruction with tissue expander between January of 2003 and June of 2012 at our hospital. The patients were divided into two groups: Group A (study group) included 30 patients with previous quadrantectomy and radiotherapy who underwent salvage mastectomy after local recurrence; Group B (control group) included 53 patients submitted to primary radical mastectomy...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27906056/umbilical-cord-blood-derived-non-hematopoietic-stem-cells-retrieved-and-expanded-on-bone-marrow-derived-extracellular-matrix-display-pluripotent-characteristics
#10
Junjie Wu, Yun Sun, Travis J Block, Milos Marinkovic, Zhi-Liang Zhang, Richard Chen, Yixia Yin, Juquan Song, David D Dean, Zhongding Lu, Xiao-Dong Chen
BACKGROUND: Umbilical cord blood (UCB) not only contains hematopoietic stem cells (HSCs), but also non-hematopoietic stem cells (NHSCs) that are able to differentiate into a number of distinct cell types. Based on studies published to date, the frequency of NHSCs in UCB is believed to be very low. However, the isolation of these cells is primarily based on their adhesion to tissue culture plastic surfaces. METHODS AND RESULTS: In the current study, we demonstrate that this approach overlooks some of the extremely immature NHSCs because they lack the ability to adhere to plastic...
December 1, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27903131/hypoxic-expansion-of-human-mesenchymal-stem-cells-enhances-3d-maturation-of-tissue-engineered-intervertebral-discs
#11
Katherine Deline Hudson, Lawrence J Bonassar
Culture of three dimensional (3D) constructs in hypoxic conditions (1-5% O2) has been shown to increase production of extracellular matrix (ECM) components in primary intervertebral disc (IVD) cells, and drive chondrogenesis of human mesenchymal stem cells (MSCs). Growing evidence that suggests that two dimensional (2D) expansion under hypoxic conditions may have an even greater influence on chondrogenesis in MSCs. This study aims to determine the effects of hypoxia during 2D expansion and subsequent 3D culture on the in vitro maturation of tissue engineering IVDs (TE-IVDs) made with human MSCs, using a previously developed TE-IVD system...
November 30, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27901499/genetic-characterization-of-esocid-herpesvirus-1-eshv1
#12
Jared T Freitas, Kuttichantran Subramaniam, Karen L Kelley, Susan Marcquenski, Joseph Groff, Thomas B Waltzek
Blue spot disease, believed to be caused by esocid herpesvirus 1 (EsHV1), has been observed in wild northern pike Esox lucius in a number of cold-water locations, including the northern USA, Canada, and Ireland. In the spring of 2014, a northern pike was caught in Wisconsin displaying the characteristic bluish-white circular plaques on the dorsum and fins. Microscopic examination of hematoxylin and eosin-stained sections of the proliferative cutaneous lesions revealed a focally extensive abundance of panepidermal, megalocytic keratinocytes with karyomegaly...
November 22, 2016: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/27900320/the-golden-spiral-flap-a-new-flap-design-that-allows-for-closure-of-larger-wounds-under-reduced-tension-how-studying-nature-s-own-design-led-to-the-development-of-a-new-surgical-technique
#13
Sharad P Paul
This paper details the study of biodynamic excisional skin tension lines on the scalp and the development of a new flap technique for closure of scalp wounds. Recently, a study by this author, on pigskin, replicated whorls by placing tissue under rapid stretch using saline tissue expanders, by recreating rapid dermo-epidermal shear of skin - thereby concluding that the golden spiral pattern is nature's own pattern for rapid expansion. Given the relationship between tissue expansion and stretch has been shown to cause deformation gradients that have both elastic and growth factors, the author set out to test the hypothesis that a golden spiral pattern therefore would be more efficient at closing wounds under less tension when compared with standard semicircular rotational flap patterns...
2016: Frontiers in Surgery
https://www.readbyqxmd.com/read/27900055/langerhans-cell-sarcoma-originating-from-left-knee-subcutaneous-tissue-a-case-report-and-literature-review
#14
Yaonan Zhang, Zongyang Qu, Fang Fang
Langerhans cell sarcoma (LCS) is a neoplastic proliferation of Langerhans cells with notably malignant cytological features. Reports of LCS are sparsely available in English literature; to the best of our knowledge, only 55 cases have been reported. The present study reports a case of LCS originating from subcutaneous tissue of the left knee in a 75-year-old man. The diagnosis of LCS was supported by the results of magnetic resonance imaging, histological and immunohistochemical studies. The tumor began to metastasize to inguinal lymph nodes and eventually involved multiple organs...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899899/cell-expansion-dependent-inflammatory-and-metabolic-profile-of-human-bone-marrow-mesenchymal-stem-cells
#15
Patricia Prieto, María Fernández-Velasco, María E Fernández-Santos, Pedro L Sánchez, Verónica Terrón, Paloma Martín-Sanz, Francisco Fernández-Avilés, Lisardo Boscá
Stem cell therapy has emerged as a promising new area in regenerative medicine allowing the recovery of viable tissues. Among the many sources of adult stem cells, bone marrow-derived are easy to expand in culture via plastic adherence and their multipotentiality for differentiation make them ideal for clinical applications. Interestingly, several studies have indicated that MSCs expansion in vitro may be limited mainly due to "cell aging" related to the number of cell divisions in culture. We have determined that MSCs exhibit a progressive decline across successive passages in the expression of stem cell markers, in plasticity and in the inflammatory response, presenting low immunogenicity...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27899897/cellular-and-molecular-responses-to-mechanical-expansion-of-tissue
#16
REVIEW
Muhammad Abdur Razzak, Md Sanower Hossain, Zamri Bin Radzi, Noor Azlin B Yahya, Jan Czernuszka, Mohammad T Rahman
The increased use of tissue expander in the past decades and its potential market values in near future give enough reasons to sum up the consequences of tissue expansion. Furthermore, the patients have the right to know underlying mechanisms of adaptation of inserted biomimetic, its bioinspired materials and probable complications. The mechanical strains during tissue expansion are related to several biological phenomena. Tissue remodeling during the expansion is highly regulated and depends on the signal transduction...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27899576/the-nuclear-and-organellar-trna-derived-rna-fragment-population-in-arabidopsis-thaliana-is-highly-dynamic
#17
Valérie Cognat, Geoffrey Morelle, Cyrille Megel, Stéphanie Lalande, Jean Molinier, Timothée Vincent, Ian Small, Anne-Marie Duchêne, Laurence Maréchal-Drouard
In the expanding repertoire of small noncoding RNAs (ncRNAs), tRNA-derived RNA fragments (tRFs) have been identified in all domains of life. Their existence in plants has been already proven but no detailed analysis has been performed. Here, short tRFs of 19-26 nucleotides were retrieved from Arabidopsis thaliana small RNA libraries obtained from various tissues, plants submitted to abiotic stress or fractions immunoprecipitated with ARGONAUTE 1 (AGO1). Large differences in the tRF populations of each extract were observed...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27898762/an-expanded-maize-gene-expression-atlas-based-on-rna-sequencing-and-its-use-to-explore-root-development
#18
Scott C Stelpflug, Rajandeep S Sekhon, Brieanne Vaillancourt, Candice N Hirsch, C Robin Buell, Natalia de Leon, Shawn M Kaeppler
Comprehensive and systematic transcriptome profiling provides valuable insight into biological and developmental processes that occur throughout the life cycle of a plant. We have enhanced our previously published microarray-based gene atlas of maize ( L.) inbred B73 to now include 79 distinct replicated samples that have been interrogated using RNA sequencing (RNA-seq). The current version of the atlas includes 50 original array-based gene atlas samples, a time-course of 12 stalk and leaf samples postflowering, and an additional set of 17 samples from the maize seedling and adult root system...
March 2016: Plant Genome
https://www.readbyqxmd.com/read/27898525/characterization-of-hcv-ns3-protease-variants-in-hcv-hiv-coinfected-patients-by-ultra-deep-sequence-analysis-relationship-to-hepatic-fibrosis
#19
Enass A Abdel-Hameed, Susan D Rouster, Xiang Zhang, Jing Chen, Mario Medvedovic, Zachary D Goodman, Kenneth E Sherman
BACKGROUND: Treatment of HCV/HIV coinfection is now largely based upon utilization of direct acting agents. Pre-treatment viral resistant-associated variants (RAVs) and host liver condition may affect the sustained virological response. In this study, we explored relative prevalence of protease resistance-associated mutations, the evolution of those RAVs following 12 weeks of pegylated interferon alfa exposure, and the role hepatic fibrosis might have on RAV display. METHODS: Thirty nonresponder HCV/ HIV coinfected subjects were evaluated pre- and post- 12 weeks of pegIFN treatment...
November 25, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27896935/sandcastle-worm-inspired-blood-resistant-bone-graft-binder-using-a-sticky-mussel-protein-for-augmented-in-vivo-bone-regeneration
#20
Hyo Jeong Kim, Bong-Hyuk Choi, Sang Ho Jun, Hyung Joon Cha
Xenogenic bone substitutes are commonly used during orthopedic reconstructive procedures to assist bone regeneration. However, huge amounts of blood accompanied with massive bone loss usually increase the difficulty of placing the xenograft into the bony defect. Additionally, the lack of an organic matrix leads to a decrease in the mechanical strength of the bone-grafted site. For effective bone grafting, this study aims at developing a mussel adhesion-employed bone graft binder with great blood-resistance and enhanced mechanical properties...
November 29, 2016: Advanced Healthcare Materials
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