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Bone ablation

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https://www.readbyqxmd.com/read/28546545/extensive-phenotypic-characterization-of-a-new-transgenic-mouse-reveals-pleiotropic-perturbations-in-physiology-due-to-mesenchymal-hgh-minigene-expression
#1
Aimilios Kaklamanos, Jan Rozman, Manolis Roulis, Niki Karagianni, Maria Armaka, Moya Wu, Laura Brachthäuser, Julia Calzada-Wack, Marion Horsch, Johannes Beckers, Birgit Rathkolb, Thure Adler, Frauke Neff, Eckhard Wolf, Valerie Gailus-Durner, Helmut Fuchs, Martin Hrabe de Angelis, George Kollias
The human growth hormone (hGH) minigene used for transgene stabilization in mice has been recently identified to be locally expressed in the tissues where transgenes are active and associated with phenotypic alterations. Here we extend these findings by analyzing the effect of the hGH minigene in TgC6hp55 transgenic mice which express the human TNFR1 under the control of the mesenchymal cell-specific CollagenVI promoter. These mice displayed a fully penetrant phenotype characterized by growth enhancement accompanied by perturbations in metabolic, skeletal, histological and other physiological parameters...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28542246/a-drastic-superoxide-dependent-oxidative-stress-is-prerequisite-for-the-down-regulation-of-irp1-insights-from-studies-on-sod1-deficient-mice-and-macrophages-treated-with-paraquat
#2
Anna Milczarek, Rafał R Starzyński, Agnieszka Styś, Aneta Jończy, Robert Staroń, Agnieszka Grzelak, Paweł Lipiński
Iron regulatory protein 1 (IRP1) is a cytosolic bifunctional [4Fe-4S] protein which exhibits aconitase activity or binds iron responsive elements (IREs) in untranslated regions of specific mRNA encoding proteins involved in cellular iron metabolism. Superoxide radical (O2.-) converts IRP1 from a [4Fe-4S] aconitase to a [3Fe-4S] "null" form possessing neither aconitase nor trans-regulatory activity. Genetic ablation of superoxide dismutase 1 (SOD1), an antioxidant enzyme that acts to reduce O2.- concentration, revealed a new O2...
2017: PloS One
https://www.readbyqxmd.com/read/28540809/percutaneous-ct-guided-radiofrequency-ablation-for-patients-with-extrahepatic-oligometastases-of-hepatocellular-carcinoma-long-term-results
#3
Luwen Mu, Lin Sun, Tao Pan, Ning Lyu, Shaolong Li, Xishan Li, Jianpeng Wang, Qiankun Xie, Haijing Deng, Lie Zheng, Jianhong Peng, Lujun Shen, Weijun Fan, Peihong Wu, Ming Zhao
BACKGROUND: The aim of this study was to evaluate the therapeutic outcome of percutaneous computed tomography (CT)-guided radiofrequency ablation (RFA) for extrahepatic oligometastases of hepatocellular carcinoma (HCC). METHODS: Institutional review board approval was obtained for this retrospective study, and all patients provided written informed consent. Between April 2004 and December 2015, 116 oligometastases (diameter, 5-50 mm; 20.3 ± 10.4) in 79 consecutive HCC patients (73 men and 6 women; average age, 50...
May 2, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540807/technical-aspects-of-osteoid-osteoma-ablation-in-children-using-mr-guided-high-intensity-focussed-ultrasound
#4
Pavel S Yarmolenko, Avinash Eranki, Ari Partanen, Haydar Celik, AeRang Kim, Matthew Oetgen, Viktoriya Beskin, Domiciano Santos, Janish Patel, Peter C W Kim, Karun Sharma
BACKGROUND: Osteoid osteoma (OO) is a painful bone tumour occurring in children and young adults. Magnetic resonance imaging-guided high intensity focussed ultrasound (MR-HIFU) allows non-invasive treatment without ionising radiation exposure, in contrast to the current standard of care treatment with radiofrequency ablation (RFA). This report describes technical aspects of MR-HIFU ablation in the first 8 paediatric OO patients treated in a safety and feasibility clinical trial (total enrolment of up to 12 patients)...
April 24, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540776/computed-tomography-guided-radiofrequency-ablation-of-intra-articular-osteoid-osteoma-a-single-centre-s-experience
#5
D K Filippiadis, G Velonakis, C Kostantos, V Kouloulias, E Brountzos, N Kelekis, A Kelekis
OBJECTIVE: To evaluate safety and efficacy of radiofrequency ablation (RFA) in the treatment of painful intra-articular osteoid osteoma. MATERIALS AND METHODS: During the last 3 years, 15 patients underwent computed tomography (CT)-guided biopsy and RFA of symptomatic intra-articular osteoid osteoma. In order to assess and sample the nidus, a coaxial bone biopsy system was used. Biopsy was performed and followed by ablation session with osteoid osteoma protocol in all cases...
March 1, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28532400/oligometastases-from-prostate-cancer-local-treatment-with-stereotactic-body-radiotherapy-sbrt
#6
Gregor Habl, Christoph Straube, Kilian Schiller, Marciana Nona Duma, Markus Oechsner, Kerstin A Kessel, Matthias Eiber, Markus Schwaiger, Hubert Kübler, Jürgen E Gschwend, Stephanie E Combs
BACKGROUND: The impact of local tumor ablative therapy in oligometastasized prostate cancer (PC) is still under debate. To gain data for this approach, we evaluated oligometastasized PC patients receiving stereotactic body radiotherapy (SBRT) to bone metastases. METHODS: In this retrospective study, 15 oligometastasized PC patients with a total of 20 bone metastases were evaluated regarding biochemical progression-free survival (PSA-PFS), time to initiation of ADT, and local control rate (LCR)...
May 22, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28508891/joint-morphogenetic-cells-in-the-adult-mammalian-synovium
#7
Anke J Roelofs, Janja Zupan, Anna H K Riemen, Karolina Kania, Sharon Ansboro, Nathan White, Susan M Clark, Cosimo De Bari
The stem cells that safeguard synovial joints in adulthood are undefined. Studies on mesenchymal stromal/stem cells (MSCs) have mainly focused on bone marrow. Here we show that lineage tracing of Gdf5-expressing joint interzone cells identifies in adult mouse synovium an MSC population largely negative for the skeletal stem cell markers Nestin-GFP, Leptin receptor and Gremlin1. Following cartilage injury, Gdf5-lineage cells underpin synovial hyperplasia through proliferation, are recruited to a Nestin-GFP(high) perivascular population, and contribute to cartilage repair...
May 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28482596/surface-roughness-in-action-cells-in-opposition
#8
P Slepička, I Michaljaničová, S Rimpelová, V Švorčík
Aim of this work is to study the interaction of krypton fluoride (KrF) excimer laser beam with a biopolymer and creation of new nanostructures with great potential for cell growth guidance. As a substrate we used biocompatible and biodegradable polymer polyhydroxybutyrate, which is frequently used in medicine and drug delivery system. Modification was carried out by KrF laser and method was also supplemented by treatment with Ar(+) plasma. The changes in physico-chemical properties of surface layer were determined by goniometry, gravimetry and X-ray photoelectron spectroscopy (XPS)...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28480607/adiponectin-enhances-quiescence-exit-of-murine-hematopoietic-stem-cells-and-hematopoietic-recovery-through-mtorc1-potentiation
#9
Yosuke Masamoto, Shunya Arai, Tomohiko Sato, Naoto Kubota, Iseki Takamoto, Takashi Kadowaki, Mineo Kurokawa
Myelotoxic injury, such as chemotherapeutic agents and ionizing radiation, unlocks the vigorous power of hematopoietic stem cells (HSCs) to replenish the hematopoietic system, making quiescent HSCs enter the cell cycle. Considering that both HSC-intrinsic and -extrinsic mechanisms enforce quiescence of HSCs, the drastic change in bone marrow (BM) environment after injury, represented by massive expansion of BM adipocytes, might trigger HSC activation. BM adipocytes, the major cellular component in the ablated marrow, however, reportedly suppress proliferation of hematopoietic cells, which may indicate the BM adipocytogenesis is an irrational response of injured organism...
May 8, 2017: Stem Cells
https://www.readbyqxmd.com/read/28479301/bone-size-and-quality-regulation-concerted-actions-of-mtor-in-mesenchymal-stromal-cells-and-osteoclasts
#10
Hongguang Wu, Zhixiang Wu, Ping Li, Qian Cong, Rongrong Chen, Wenrui Xu, Soma Biswas, Huijuan Liu, Xuechun Xia, Shanshan Li, Weiwei Hu, Zhenlin Zhang, Samy L Habib, Lingli Zhang, Jun Zou, Hongbing Zhang, Weihong Zhang, Baojie Li
The bone size and quality, acquired during adolescent growth under the influence of anabolic hormones, growth factors, and nutrients, determine the height and bone stability and forecast osteoporosis risks in late life. Yet bone size and quality control mechanisms remain enigmatic. To study the roles of mammalian target of rapamycin (mTOR) signaling, sensor of growth factors and nutrients, in bone size and quality regulation, we ablated Tsc1, a suppressor of mTOR, in mesenchymal stromal cells (MSCs), monocytes, or their progenies osteoblasts and osteoclasts...
April 29, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28475811/ablation-of-hepatic-production-of-the-acid-labile-subunit-in-the-bovine-gh-transgenic-mice-effects-on-organ-and-skeletal-growth
#11
Zhongbo Liu, Tianzhen Han, Shannon Fishman, James Butler, Tracy Zimmermann, Frederic Tremblay, Carole Harbison, Nidhi Agrawal, John J Kopchick, Mitchell B Schaffler, Shoshana Yakar
Growth hormone (GH) and insulin like growth factor-1 (IGF-1) are anabolic hormones that facilitate somatic and skeletal growth, and regulate metabolism via endocrine and autocrine/paracrine mechanisms. We hypothesized that excess tissue production of GH will protect skeletal growth and integrity in states of reductions in serum IGF-1 levels. To test our hypothesis we used the bovine GH (bGH) transgenic mice as a model of GH hypersecretion and ablated the liver-derived acid labile subunit (ALS), which stabilizes IGF-1 complexes with IGF-binding protein-3 (IGFBP-3) and -5 in circulation...
May 4, 2017: Endocrinology
https://www.readbyqxmd.com/read/28468174/the-strategy-of-delayed-reconstruction-of-the-mandible-in-war-injuries
#12
Firas Taha Ahmed, Marwa Turkey Aljeuary
The most common causes of mandibular defects are ablative surgery of benign or malignant tumors, severe trauma, inflammatory diseases, and osteoradionecrosis. War injuries are another cause for mandibular defect. Reconstruction of the mandible is considered a challenge to the maxillofacial surgeon due to the accompanying functional and cosmetic importance. The object of this article was to show the role of nonvascularized bone graft in the reconstruction of segmental defect of the mandible resulted from projectiles and its snags...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28466103/air-blocking-ablation-of-osteoid-osteoma-a-technical-note
#13
Gokhan Kuyumcu, Evan Gregory Mason, Hakan Ilaslan
Osteoid osteoma accounts for approximately 10-12% of all benign bone tumors. Surgery was the treatment of choice for osteoid osteomas until percutaneous radiofrequency ablation (RFA) was introduced in 1992. Although RFA is generally considered curative in the treatment of osteoid osteoma, disease recurrence after ablation has been reported. We report a case in which RFA was delayed by the presence air surrounding the ablation probe. In this case, ablation could only be performed after the probe was removed and saline was injected through the introducer needle to displace the air...
July 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28457748/gli1-mesenchymal-stromal-cells-are-a-key-driver-of-bone-marrow-fibrosis-and-an-important-cellular-therapeutic-target
#14
Rebekka K Schneider, Ann Mullally, Aurelien Dugourd, Fabian Peisker, Remco Hoogenboezem, Paulina M H Van Strien, Eric M Bindels, Dirk Heckl, Guntram Büsche, David Fleck, Gerhard Müller-Newen, Janewit Wongboonsin, Monica Ventura Ferreira, Victor G Puelles, Julio Saez-Rodriguez, Benjamin L Ebert, Benjamin D Humphreys, Rafael Kramann
Bone marrow fibrosis (BMF) develops in various hematological and non-hematological conditions and is a central pathological feature of myelofibrosis. Effective cell-targeted therapeutics are needed, but the cellular origin of BMF remains elusive. Here, we show using genetic fate tracing in two murine models of BMF that Gli1(+) mesenchymal stromal cells (MSCs) are recruited from the endosteal and perivascular niche to become fibrosis-driving myofibroblasts in the bone marrow. Genetic ablation of Gli1(+) cells abolished BMF and rescued bone marrow failure...
April 13, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28452797/a-national-survey-of-computed-tomography-doses-in-hybrid-pet-ct-and-spect-ct-examinations-in-the-uk
#15
Gareth R Iball, Natalie A Bebbington, Maria Burniston, Sue Edyvean, Louise Fraser, Peter Julyan, Nasreen Parkar, Tim Wood
OBJECTIVES: The aim of this study was to conduct a nationwide survey of computed tomography (CT) doses for a wide range of PET-CT and single photon emission computed tomography-computed tomography (SPECT-CT) imaging procedures, with the aim of generating proposed UK national diagnostic reference levels (NDRLs). METHODS: CT protocol and dosimetry data for three PET-CT and seven SPECT-CT examinations were gathered from centres across the UK. Data were divided according to CT purpose (attenuation correction, localization or diagnostic) and third quartile values of scanner average dose metrics were used to generate suggested NDRLs for a range of examination and CT purpose combinations...
June 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28451704/-benign-tumours-and-tumour-like-lesions-of-the-bone-general-treatment-principles
#16
REVIEW
H Fritzsche, K-D Schaser, C Hofbauer
BACKGROUND: Benign bone lesions are much more common than malignant lesions. Some benign bone tumors have a characteristic and typical radiographic appearance, while others are more challenging. Therapy of benign bone tumors differs greatly. While the majority of benign bone tumors do not require surgical therapy, other specific lesions, e. g. aneurysmal bone cysts or giant cell tumors (GCT) of the bone require surgery due to their locally aggressive behavior. DIAGNOSTICS: The major challenge for the radiologist and/or pathologist is the differentiation between a benign and low-grade malignant lesion (e...
April 27, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28447111/-diagnostics-and-treatment-of-osteoid-osteoma
#17
REVIEW
P Orth, D Kohn
BACKGROUND: Osteoid osteoma is the third most common benign bone tumor and typically induces pain that is worse at night. OBJECTIVE: To identify the epidemiological, pathogenetic, histological and radiological characteristics of osteoid osteoma and to present the broad variety of treatment options. MATERIAL AND METHODS: This review article summarizes relevant clinical studies and meta-analyses on this topic. RESULTS: Osteoid osteoma is characterized by a central nidus smaller than 1...
April 26, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28441214/the-osteo-odonto-keratoprosthesis
#18
Mehran Zarei-Ghanavati, Venkata Avadhanam, Alfonso Vasquez Perez, Christopher Liu
PURPOSE OF REVIEW: To describe the practice of and recent developments in the osteo-odonto-keratoprosthesis. RECENT FINDINGS: Formal psychological assessment and support have been described. A sub-aqua system for fashioning the osteo-odonto-keratoprosthesis lamina; adoption of thicker laminae; use of bisphosphonate drugs; advances in laminar imaging; and use of bone augmentation and bone morphogenetic protein have been described for prevention, detection, and management of laminar resorption...
April 24, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28441086/hematopoietic-to-mesenchymal-transition-of-adipose-tissue-macrophages-is-regulated-by-integrin-%C3%AE-1-and-fabricated-fibrin-matrices
#19
Kathleen M Gavin, Susan M Majka, Wendy M Kohrt, Heidi L Miller, Timothy M Sullivan, Dwight J Klemm
Some bona fide adult adipocytes arise de novo from a bone marrow-derived myeloid lineage. These studies further demonstrate that adipose tissue stroma contains a resident population of myeloid cells capable of adipocyte and multilineage mesenchymal differentiation. These resident myeloid cells lack hematopoietic markers and express mesenchymal and progenitor cell markers. Because bone marrow mesenchymal progenitor cells have not been shown to enter the circulation, we hypothesized that myeloid cells acquire mesenchymal differentiation capacity in adipose tissue...
April 3, 2017: Adipocyte
https://www.readbyqxmd.com/read/28438966/mediation-of-movement-induced-breakthrough-cancer-pain-by-ib4-binding-nociceptors-in-rats
#20
Joshua Havelin, Ian Imbert, Devki Sukhtankar, Bethany Remeniuk, Ian Pelletier, Jonathan Gentry, Alec Okun, Timothy Tiutan, Frank Porreca, Tamara King
Cancer-induced bone pain (CIBP) is characterized by moderate to severe ongoing pain that commonly requires the use of opiates. Even when ongoing pain is well controlled, patients can suffer breakthrough pain (BTP), episodic severe pain that "breaks through" the medication. We developed a novel model of cancer-induced BTP using female rats with mammary adenocarcinoma cells sealed within the tibia. We previously demonstrated that rats with bone cancer learn to prefer a context paired with saphenous nerve block to elicit pain relief (i...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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