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https://www.readbyqxmd.com/read/28078867/plasma-endocannabinoid-behaviour-in-total-knee-and-hip-arthroplasty
#1
R Ottria, L Cappelletti, A Ravelli, M Mariotti, F Gigli, S Romagnoli, P Ciuffreda, G Banfi, L Drago
Endocannabinoids are a class of lipid mediators involved in a wide range of physiological pathways including pain perception, and immunological defences. In particular, the involvement of endocannabinoids in bone metabolism and bone resorption has recently been studied. Moreover, one study on total knee arthroplasty describes the probable role of endocannabinoids in pain perception after surgery. The aim of the present study was to evaluate variations of endocannabinoid concentrations in patients undergoing total hip or total knee arthroplasty before and after surgery...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28076822/an-in-vitro-analysis-of-the-size-and-shape-of-cryolesions-for-facet-joint-denervation
#2
T Wolter, Y Bozhkov, S M Knoeller
OBJECTIVES: Lumbar facet joint syndrome (LFJS) is the cause of lower back pain in 15-54% of the patients. Clinical studies of cryotherapy for LFJS have reported promising outcomes. However, few studies have focused on the technical aspects of cryoneurolysis for LFJS. The aim of the study was to determine the size and shape of cryolesions in vitro and to determine how they are affected by the duration of freezing, size of the cryoprobe and distance and angulation to an osseous boundary layer...
January 4, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28075460/roles-of-oncogenes-and-tumor-suppressor-genes-in-osteoclastogenesis-review
#3
Akari Minami, Mako Ogino, Noriko Nakano, Mayuko Ichimura, Atsuko Nakanishi, Toshiyuki Murai, Yasuko Kitagishi, Satoru Matsuda
Osteoporosis is a bone disease that poses a tremendous burden to health care. The receptor activator of nuclear factor-κB (RANK) and its ligand (RANKL) have been a major focus of this research field. RANKL signaling not only activates a variety of downstream signaling pathways required for osteoclast development, but crosstalk with other signaling pathways also adjusts bone homeostasis both in normal physiology and in bone disease. Consequently, novel drugs specifically targeting RANK-RANKL and their signaling pathways in osteoclasts are expected to revolutionize the treatment of various bone diseases such as osteoporosis...
January 4, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28074842/analysis-of-the-fgf-gene-family-provides-insights-into-aquatic-adaptation-in-cetaceans
#4
Kiwoong Nam, Kyeong Won Lee, Oksung Chung, Hyung-Soon Yim, Sun-Shin Cha, Sae-Won Lee, JeHoon Jun, Yun Sung Cho, Jong Bhak, João Pedro de Magalhães, Jung-Hyun Lee, Jae-Yeon Jeong
Cetacean body structure and physiology exhibit dramatic adaptations to their aquatic environment. Fibroblast growth factors (FGFs) are a family of essential factors that regulate animal development and physiology; however, their role in cetacean evolution is not clearly understood. Here, we sequenced the fin whale genome and analysed FGFs from 8 cetaceans. FGF22, a hair follicle-enriched gene, exhibited pseudogenization, indicating that the function of this gene is no longer necessary in cetaceans that have lost most of their body hair...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070593/-morphological-investigations-of-deep-sole-ulcers-in-cattle-part-1-the-complicated-rusterholz-ulcer
#5
Susanne Gehringer, Matthias Müller, Johann Maierl
OBJECTIVE: In the context of a larger study on morphological changes of deep sole ulcers, claws with Rusterholz ulcer (RU) were investigated to describe the varied pathological changes of the RU. MATERIAL AND METHODS: Hind limbs of 55 cows displaying external signs of complicated sole ulcers were examined externally and internally. To examine the samples internally, a sagittal section was performed. Furthermore, the material was examined histologically and after bone maceration...
January 10, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28070554/marrow-inspired-matrix-cues-rapidly-affect-early-fate-decisions-of-hematopoietic-stem-and-progenitor-cells
#6
Ji Sun Choi, Brendan A C Harley
Hematopoiesis is the physiological process where hematopoietic stem cells (HSCs) continuously generate the body's complement of blood and immune cells within unique regions of the bone marrow termed niches. Although previous investigations have revealed gradients in cellular and extracellular matrix (ECM) content across the marrow, and matrix elasticity and ligand type are believed to be strong regulators of stem cell fate, the impact of biophysical signals on HSC response is poorly understood. Using marrow-inspired ECM ligand-coated polyacrylamide substrates that present defined stiffness and matrix ligand cues, we demonstrate that the interplay between integrin engagement and myosin II activation processes affects the morphology, proliferation, and myeloid lineage specification of primary murine HSCs within 24 hours ex vivo...
January 2017: Science Advances
https://www.readbyqxmd.com/read/28070107/effects-of-reduced-food-intake-for-4-weeks-on-physiological-parameters-in-toxicity-studies-in-dogs
#7
Junya Morita, Tomoko Izumi, Bunichiro Ogawa, Yoshiki Ban, Hironori Takagi, Minoru Sasaki, Shunsuke Tsutsumi
This study sought to clarify the effects of reduced feeding on physiological parameters in dogs to enable appropriate evaluations of the safety and toxicity of test compounds. We measured alkaline phosphatase isozymes and the circulating blood volume, as well as clinical signs, body weight, hematology, blood chemistry, electrocardiography, organ weight, and histopathology, in male beagle dogs fed a diet consisting of 300 g/day or 150 g/day for 4 weeks. There were no abnormal clinical signs in any of the dogs...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28069815/identification-and-characterization-of-mirna-differentially-expressed-in-macrophages-exposed-to-porphyromonas-gingivalis-infection
#8
Olivier Huck, Jacob Al-Hashemi, Laetitia Poidevin, Olivier Poch, Jean-Luc Davideau, Henri Tenenbaum, Salomon Amar
MicroRNAs (miRNAs) are short, non-coding RNAs involved in the regulation of several processes associated with inflammatory diseases and infection. Bacterial infection modulates miRNA expression to subvert any innate immune response. In this study, we analyzed bacterial modulation of miRNAs in bone-marrow-derived macrophages (BMMs), in which activity was induced by infection with Porphyromonas gingivalis (Pg) through a microarray analysis. Several miRNA expressions were modulated 3 hours post infection (at a MOI of 25)...
January 9, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28069103/does-cu-supplementation-affect-the-mechanical-and-structural-properties-and-mineral-content-of-red-deer-antler-bone-tissue
#9
P Gambín, M P Serrano, L Gallego, A García, J Cappelli, F Ceacero, T Landete-Castillejos
The main factors affecting the mechanical (and other) properties of bone, including antler, are the proportions of ash (especially Ca and P) and collagen content. However, some trace minerals may also play more important roles than would be expected, given their low levels in bone and antler. One such trace mineral is Cu. Here, we studied the effects of Cu supplementation on the mechanical and structural characteristics, and mineral content of antlers from yearling and adult (4 years of age) red deer fed a balanced diet...
January 10, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28068276/repositioning-of-a-pathologically-migrated-tooth-using-autologous-platelet-rich-plasma-a-case-report-with-3-year-follow-up
#10
B V Karthikeyan, Divya Khanna, M Lv Prabhuji
An intricate balance between the periodontal tissues and the forces of occlusion, tongue, and lips helps to maintain a tooth in its physiologic position within the dental arch. Disturbances in the equilibrium can cause a tooth to migrate pathologically, often requiring multidisciplinary treatment approaches. The present case demonstrates, for the first time, the use of autologous platelet-rich plasma to aid in tooth repositioning after pathologic tooth migration. A 25-year-old woman presented with extrusion and labial migration of the maxillary left central incisor, a diastema of 3 mm, and grade II mobility...
January 2017: General Dentistry
https://www.readbyqxmd.com/read/28065270/functional-study-of-the-vitamin-k-cycle-enzymes-in-live-cells
#11
J-K Tie, D W Stafford
Vitamin K-dependent carboxylation, an essential posttranslational modification catalyzed by gamma-glutamyl carboxylase, is required for the biological functions of proteins that control blood coagulation, vascular calcification, bone metabolism, and other important physiological processes. Concomitant with carboxylation, reduced vitamin K (KH2) is oxidized to vitamin K epoxide (KO). KO must be recycled back to KH2 by the enzymes vitamin K epoxide reductase and vitamin K reductase in a pathway known as the vitamin K cycle...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28064404/heterogeneous-nanomechanical-properties-of-type-i-collagen-in-longitudinal-direction
#12
Ming Tang, Tong Li, Neha S Gandhi, Kevin Burrage, YuanTong Gu
Collagen is an abundant structural biopolymer in mammal vertebrates, providing structural support as well as mechanical integrity for connective tissues such as bone, ligament, and tendon. The mechanical behaviours of these tissues are determined by the nanomechanics of their structures at different hierarchies and the role of collagen structures in the extracellular matrix. Some studies revealed that there is significant microstructural difference in the longitudinal direction of the collagen fibril, which challenges the conventional rod-like assumption prevalently adopted in the existing studies...
January 7, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28064238/myeloid-malignancies-and-the-microenvironment
#13
Claudia Korn, Simón Méndez-Ferrer
Research in the last few years has revealed a sophisticated interaction network between multiple bone marrow (BM) cells that regulate different hematopoietic stem cell (HSC) properties, such as proliferation, differentiation, localization and self-renewal during homeostasis. These mechanisms are essential to keep the physiological HSC numbers in check and interfere with malignant progression. Besides the identification of multiple mutations and chromosomal aberrations driving the progression of myeloid malignancies, alterations in the niche compartment recently gained attention in contributing to disease progression...
November 15, 2016: Blood
https://www.readbyqxmd.com/read/28060911/resting-energy-expenditure-in-adults-with-becker-s-muscular-dystrophy
#14
Matthew F Jacques, Paul Orme, Jonathon Smith, Christopher I Morse
PURPOSE: The purpose of this study was: 1) To compare Resting energy expenditure (REE) in adult males with Becker's Muscular Dystrophy (BeMD, n = 21, 39 ±12 years) and healthy controls (CTRL, n = 12, 37 ±12 years) 2) Determine whether other physiological parameters correlate with REE in BeMD, and 3) Compare current prediction methods of REE with measured REE. METHODS: REE was calculated via indirect calorimetry using continuous, expired gas analysis following an overnight fast...
2017: PloS One
https://www.readbyqxmd.com/read/28060328/culture-of-murine-embryonic-metatarsals-a-physiological-model-of-endochondral-ossification
#15
Dean A Houston, Katherine A Staines, Vicky E MacRae, Colin Farquharson
The fundamental process of endochondral ossification is under tight regulation in the healthy individual so as to prevent disturbed development and/or longitudinal bone growth. As such, it is imperative that we further our understanding of the underpinning molecular mechanisms involved in such disorders so as to provide advances towards human and animal patient benefit. The mouse metatarsal organ explant culture is a highly physiological ex vivo model for studying endochondral ossification and bone growth as the growth rate of the bones in culture mimic that observed in vivo...
December 3, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28057742/dual-role-of-il-21-in-megakaryopoiesis-and-platelet-homeostasis
#16
Salima Benbarche, Catherine Strassel, Catherine Angénieux, Léa Mallo, Monique Freund, Christian Gachet, François Lanza, Henri de la Salle
Gene profiling studies have indicated that in vitro differentiated human megakaryocytes express the receptor for IL-21 (IL-21R), an immunostimulatory cytokine associated with inflammatory disorders and currently under evaluation in cancer therapy. The aim of this study was to investigate whether IL-21 modulates megakaryopoiesis. We first checked the expression of IL-21 receptor on human bone marrow and in vitro differentiated megakaryocytes. Then, we investigated the effect of IL-21 on the in vitro differentiation of human blood CD34+ progenitors into megakaryocytes...
January 5, 2017: Haematologica
https://www.readbyqxmd.com/read/28056959/morphological-densitometric-and-mechanical-properties-of-mandible-in-5-month-old-polish-merino-sheep
#17
Anna Szabelska, Marcin R Tatara, Witold Krupski
BACKGROUND: Among bones building the axial and appendicular skeleton, the mandible is characterized by unique morphological and functional traits. The aim of the study was to evaluate morphological, densitometric and mechanical properties of mandible in 5-month-old Polish Merino sheep. Using quantitative computed tomography, volumetric bone mineral density (vBMD) and calcium hydroxyapatite density of the cortical bone (CbCa-HA), mean vBMD (MvBMD) and total bone volume were determined...
January 5, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28056127/applications-of-robotic-testing-systems-in-orthopaedics
#18
Richard E Debski, Satoshi Yamakawa, Volker Musahl, Hiromichi Fujie
Diarthrodial joint function is mediated by a complex interaction between bones, ligaments, capsules, articular cartilage, and muscles. To gain a better understanding of injury mechanisms and to improve surgical procedures, more scientific knowledge on the biomechanics of diarthrodial joints needs to be obtained. Robotic testing systems have been developed to measure kinematics and in situ forces in ligaments and their reconstructions using cadaveric diarthrodial joints. These 6 degree-of-freedom (DOF) robotic testing systems can be controlled in either position or force modes to simulate physiological loading conditions or clinical exams...
January 5, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28051153/the-metastasis-suppressor-rarres3-as-an-endogenous-inhibitor-of-the-immunoproteasome-expression-in-breast-cancer-cells
#19
Alison M Anderson, Murugan Kalimutho, Sarah Harten, Devathri M Nanayakkara, Kum Kum Khanna, Mark A Ragan
In breast cancer metastasis, the dynamic continuum involving pro- and anti-inflammatory regulators can become compromised. Over 600 genes have been implicated in metastasis to bone, lung or brain but how these genes might contribute to perturbation of immune function is poorly understood. To gain insight, we adopted a gene co-expression network approach that draws on the functional parallels between naturally occurring bone marrow-derived mesenchymal stem cells (BM-MSCs) and cancer stem cells (CSCs). Our network analyses indicate a key role for metastasis suppressor RARRES3, including potential to regulate the immunoproteasome (IP), a specialized proteasome induced under inflammatory conditions...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28050988/comparative-study-of-piezoelectric-and-rotary-osteotomy-technique-for-third-molar-impaction
#20
Sulphi A Basheer, R Jay Govind, Augustine Daniel, George Sam, V J Adarsh, Akshatha Rao
INTRODUCTION: Bone removal is necessary for extracting the third molars that are erupted, partially erupted, and/or impacted in bone. Hence, it is necessary to choose a surgical method or instruments that conform to anatomic landmarks and are based on physiological principles. Many authors have reported injuries to the adjacent tooth, especially the distal part of periodontium after removal of second molar. Hence, the present study was undertaken to assess and compare the surgical and postsurgi-cal outcomes of third molar removal using piezoelectric surgery and rotary bur...
January 1, 2017: Journal of Contemporary Dental Practice
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