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https://www.readbyqxmd.com/read/29783279/bone-area-histomorphometry
#1
Janna M Andronowski, Christian Crowder
Quantifying the amount of cortical bone loss is one variable used in histological methods of adult age estimation. Measurements of cortical area tend to be subjective and additional information regarding bone loss is not captured considering cancellous bone is disregarded. We describe whether measuring bone area (cancellous + cortical area) rather than cortical area may improve histological age estimation for the sixth rib. Mid-shaft rib cross-sections (n = 114) with a skewed sex distribution were analyzed...
May 21, 2018: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29782852/atp6v1h-regulates-the-growth-and-differentiation-of-bone-marrow-stromal-cells
#2
Lin Li, Shaoqing Yang, Yanli Zhang, Dongrui Ji, Zuolin Jin, Xiaohong Duan
ATP6V1H encodes subunit H of vacuolar ATPase (V-ATPase) and may regulate osteoclastic function. The deficiency of ATP6V1H caused bone loss in human, mouse and zebrafish. In this report, we identified the mechanisms by which ATP6V1H regulates proliferation and differentiation of bone marrow stromal cells (BMSCs). We found that ATP6V1H was expressed in BMSCs, andAtp6v1h+/- BMSCs exhibited the lower proliferation rate, cell cycle arrest and reduced osteogenic differentiation capacity, as well as the increased adipogenic potentials...
May 18, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29782529/molecular-effect-of-an-optn-common-variant-associated-to-paget-s-disease-of-bone
#3
Iris A L Silva, Natércia Conceição, Édith Gagnon, Jacques P Brown, M Leonor Cancela, Laëtitia Michou
Paget's disease of bone (PDB) is a chronic bone disorder and although genetic factors appear to play an important role in its pathogenesis, to date PDB causing mutations were identified only in the Sequestosome 1 (SQSTM1) gene at the PDB3 locus. PDB6 locus, also previously linked to PDB, contains several candidate genes for metabolic bone diseases. We focused our analysis in the most significantly associated variant with PDB, within the Optineurin (OPTN) gene, i.e. the common variant rs1561570. Although it was previously shown to be strongly associated with PDB in several populations, its contribution to PDB pathogenesis remains unclear...
2018: PloS One
https://www.readbyqxmd.com/read/29782037/multiloculated-solitary-unicameral-bone-cyst-in-a-young-dog
#4
Sarah C Roode, Heather R Shive, Willemijn Hoorntje, Jennifer Bernard, Devorah M Stowe, Roy R Pool, Carol B Grindem
A 20-month-old female spayed Staffordshire Terrier (22.3 kg) presented to the Orthopedic Surgery Service at North Carolina State University Veterinary Teaching Hospital for evaluation of a 6-week history of toe-touching to nonweight-bearing lameness in the right hind limb. Radiographs of the right stifle revealed a multiloculated lytic lesion of the distal femur, with a large open lytic zone centrally, numerous osseous septations peripherally, and focal areas of cortical thinning and loss. An aspirate of the right distal femoral lesion yielded mildly cloudy serosanguineous fluid...
May 21, 2018: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/29781960/a-peripherally-restricted-cannabinoid-1-receptor-agonist-as-a-novel-analgesic-in-cancer-induced-bone-pain
#5
Hong Zhang, Dominique M Lund, Haley A Ciccone, William D Staatz, Mohab M Ibrahim, Tally M Largent-Milnes, Herbert H Seltzman, Igor Spigelman, Todd W Vanderah
Many malignant cancers, including breast cancer, have a propensity to invade bones, leading to excruciating bone pain. Opioids are the primary analgesics used to alleviate this cancer-induced bone pain (CIBP) but are associated with numerous severe side effects, including enhanced bone degradation, which significantly impairs patients' quality of life. In contrast, agonists activating only peripheral CB1 receptors (CB1Rs) have been shown to effectively alleviate multiple chronic pain conditions with limited side effects, yet no studies have evaluated their role(s) in CIBP...
May 16, 2018: Pain
https://www.readbyqxmd.com/read/29781675/axial-sesamoiditis-in-the-horse-a-review
#6
Christelle Le Roux, Ann Carstens
Axial sesamoiditis or osteitis of the proximal sesamoid bones (PSBs) in the horse is described as a rare condition. The cause remains unknown and speculative, with vascular, infectious, and traumatic aetiologies implicated. It is specifically associated with injury of the palmar or plantar ligament (PL), also known as the intersesamoidean ligament. Imaging findings are generally rewarding and radiological changes are typical, if not pathognomonic, for the condition. Lesions consist of bone lysis at the apical to mid-body axial margins of the PSBs, with variable degrees of joint effusion...
March 29, 2018: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/29780964/cochlear-implant-histopathology
#7
Fred H Linthicum, Joni K Doherty, Ivan A Lopez, Akira Ishiyama
The microscopic examination of fifty-five serially sectioned implanted temporal bones has provided insight into what is being stimulated; and the changes that are the result of the insertion and presence of the implant. The ganglion cell bodies (neurons) are structures being stimulated (two laboratories have reported an inverse relationship of the number of neurons and performance). Insertion through the round window, verses a cochleostomy, produces the least fibrosis and new bone. Fibrosis and new bone do not affect the implant function unless they form in the scala vestibuli in the region of the ductus reuniens, and, block it; and produce cochlear hydrops resulting in a delayed low tone loss of hearing in hybrid implants...
December 2017: World Journal of Otorhinolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29780843/adjustable-versus-fixed-loop-devices-for-femoral-fixation-in-acl-reconstruction-an-in-vitro-full-construct-biomechanical-study-of-surgical-technique-based-tibial-fixation-and-graft-preparation
#8
Patrick A Smith, Marina Piepenbrink, Shelby K Smith, Samuel Bachmaier, Asheesh Bedi, Coen A Wijdicks
Background: Femoral suspensory fixation for anterior cruciate ligament (ACL) reconstruction has evolved from fixed- to adjustable-loop devices. However, there are still controversies regarding undesired lengthening of adjustable-loop devices. Hypothesis: Adjustable-loop fixation will achieve similar elongation to that of fixed-loop devices, and intraoperative preconditioning will reduce initial elongation for adjustable-loop constructs. Study Design: Controlled laboratory study...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29780652/cardiac-tamponade-as-the-initial-presentation-of-acute-myeloid-leukemia-a-case-report-with-review-of-the-literature
#9
Dillon Karmo, Adam Hafeez, Alexandra Halalau, Siddhartha Yadav
Acute myeloid leukemia (AML) is a complex disease with a variety of presentations. A large pericardial effusion is rare, occurring in less than 0.5% of all patients with AML prior to treatment. A 34-year-old male presented with dyspnea, malaise, and weight loss. On physical exam, he was noted to be hypoxic, tachypneic, tachycardic, and hypotensive. He had cervical lymphadenopathy and jugular venous distention. His WBC count was 110 bil/L with 33% blasts. Bone marrow biopsy confirmed AML with 60% blasts. Leukemic cells were also seen in the cerebrospinal fluid on lumbar puncture...
2018: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/29779364/swing-door-overlay-tympanoplasty-surgical-technique-and-outcomes
#10
So Young Park, Hyuk Jae Lee, Myung Joo Shim, Dong Kee Kim, Byung Do Suh, Shi Nae Park
Objectives: The classical overlay tympanoplasty is technically difficult with some disadvantages and thus less popular. However, it is particularly useful for large, anterior perforations. In this study, we describe the technique of a modified overlay graft in the tympanoplasty coined as the swing-door overlay tympanoplasty and report its outcomes. Methods: Retrospective review of patients undergoing the swing-door overlay tympanoplasty at a tertiary referral center between 2003 and 2016 was performed...
May 22, 2018: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/29777960/utility-of-cement-injection-to-stabilize-split-depression-tibial-plateau-fracture-by-minimally-invasive-methods-a-finite-element-analysis
#11
D Belaid, T Vendeuvre, A Bouchoucha, F Brémand, C Brèque, P Rigoard, A Germaneau
BACKGROUND: Treatment for fractures of the tibial plateau is in most cases carried out by stable fixation in order to allow early mobilization. Minimally invasive technologies such as tibioplasty or stabilization by locking plate, bone augmentation and cement filling (CF) have recently been used to treat this type of fracture. The aim of this paper was to determine the mechanical behavior of the tibial plateau by numerically modeling and by quantifying the mechanical effects on the tibia mechanical properties from injury healing...
May 8, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29777887/linear-cutting-trepanation-in-italy-a-unique-case-from-hellenistic-sicily-3-rd-century-bc
#12
REVIEW
Giorgia Tulumello, Giulia Riccomi, Simona Minozzi, Sveva Longo, Marcello Longo, Valentina Giuffra
During the archaeological excavations conducted in the Hellenistic necropolis discovered in Messina (Sicily, Italy) dating back to the 3rd century BC., a skeleton showing evidence of cranial traumas and surgical intervention was found. The skull, belonging to a young adult male, presented signs of four head injuries produced by both blunt and sharp-edged instruments. The first two lesions, located on the frontal bone, were produced by blunt blows and showed signs of long-time survival. The third lesion, located on the inferior portion of the right parietal, suggests a perimortem non-penetrating linear cut probably caused by a blade instrument...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29777787/patency-and-incontinence-rates-after-robotic-bladder-neck-reconstruction-for-vesicourethral-anastomotic-stenosis-and-recalcitrant-bladder-neck-contractures-the-turns-experience
#13
Eric J Kirshenbaum, Lee C Zhao, Jeremy B Myers, Sean P Elliott, Alex J Vanni, Nima Baradaran, Bradley A Erickson, Jill C Buckley, Bryan B Voelzke, Michael A Granieri, Stephen J Summers, Benjamin N Breyer, Atreya Dash, Aaron Weinberg, Nejd F Alsikafi
OBJECTIVE: To review a robotic approach to recalcitrant bladder neck obstruction and assess success and incontinence rates. METHODS: Patients with a recalcitrant bladder neck contracture or vesicourethral anastomotic stenosis who underwent robotic bladder neck reconstruction (RBNR) were identified. We reviewed patient demographics, medical history, etiology, previous endoscopic management, cystoscopic and symptomatic outcomes, urinary continence and complications...
May 16, 2018: Urology
https://www.readbyqxmd.com/read/29777577/autologous-bone-marrow-mesenchymal-stem-cells-improve-the-quality-and-stability-of-vascularized-flap-surgery-of-irradiated-skin-in-pigs
#14
Christine Linard, Michel Brachet, Carine Strup-Perrot, Bruno L'homme, Elodie Busson, Claire Squiban, Valerie Holler, Michel Bonneau, Jean-Jacques Lataillade, Eric Bey, Marc Benderitter
Cutaneous radiation syndrome has severe long-term health consequences. Because it causes an unpredictable course of inflammatory waves, conventional surgical treatment is ineffective and often leads to a fibronecrotic process. Data about the long-term stability of healed wounds, with neither inflammation nor resumption of fibrosis, are lacking. In this study, we investigated the effect of injections of local autologous bone marrow-derived mesenchymal stromal cells (BM-MSCs), combined with plastic surgery for skin necrosis, in a large-animal model...
May 18, 2018: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29777508/endothelial-progenitor-cells-in-heart-failure-an-authentic-expectation-for-potential-future-use-and-a-lack-of-universal-definition
#15
REVIEW
Andie H Djohan, Ching-Hui Sia, Poay Sian Lee, Kian-Keong Poh
Congestive heart failure (CHF) is a prevalent disease (especially among the elderly) with high mortality and morbidity rates. The pathological hallmark of CHF is a loss of cardiomyocytes leading to cardiac fibrosis and dysfunctional cardiac remodeling, which culminates in organ failure. Endothelial progenitor cells (EPCs) are bone marrow-derived cells that contribute to maintenance of the integrity of endothelial wall and protect ischemic myocardium through forming new blood vessels (vasculogenesis) or proliferation of pre-existing vasculature (angiogenesis)...
May 17, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29777277/impact-of-muscle-atrophy-on-bone-metabolism-and-bone-strength-implications-for-muscle-bone-crosstalk-with-aging-and-disuse
#16
REVIEW
T Bettis, B-J Kim, M W Hamrick
Bone fractures in older adults are often preceded by a loss of muscle mass and strength. Likewise, bone loss with prolonged bed rest, spinal cord injury, or with exposure to microgravity is also preceded by a rapid loss of muscle mass. Recent studies using animal models in the setting of hindlimb unloading or botulinum toxin (Botox) injection also reveal that muscle loss can induce bone loss. Moreover, muscle-derived factors such as irisin and leptin can inhibit bone loss with unloading, and knockout of catabolic factors in muscle such as the ubiquitin ligase Murf1 or the myokine myostatin can reduce osteoclastogenesis...
May 18, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29777011/fox-proteins-are-modular-competency-factors-for-facial-cartilage-and-tooth-specification
#17
Pengfei Xu, Bartosz Balczerski, Amanda Ciozda, Kristin Louie, Veronika Oralova, Ann Huysseune, J Gage Crump
Facial form depends on the precise positioning of cartilage, bone, and tooth fields in the embryonic pharyngeal arches. How complex signaling information is integrated to specify these cell types remains a mystery. We find that modular expression of Forkhead-domain transcription factors (Fox) in the zebrafish face arises through integration of Hh, Fgf, Bmp, Edn1, and Jagged-Notch pathways. Whereas loss of C-class Fox proteins results in reduced upper facial cartilages, loss of F-class Fox proteins results in distal jaw truncations and absent midline cartilages and teeth...
May 18, 2018: Development
https://www.readbyqxmd.com/read/29776906/blood-induced-bone-loss-in-murine-hemophilic-arthropathy-is-prevented-by-blocking-the-irhom2-adam17-tnf%C3%AE-pathway
#18
Coline Haxaire, Narine Hakobyan, Tania Pannellini, Camila Carballo, David McIlwain, Tak W Mak, Scott Rodeo, Suchitra Acharya, Daniel Li, Jackie Szymonifka, Xiangqian Song, Sébastien Monette, Alok Srivastava, Jane E Salmon, Carl P Blobel
Hemophilic arthropathy (HA) is a debilitating degenerative joint disease that is a major manifestation of the bleeding disorder Hemophilia A. HA typically begins with hemophilic synovitis (HS) that resembles inflammatory arthritides such as rheumatoid arthritis (RA) and frequently results in bone loss in patients. A major cause of RA is inappropriate release of the pro-inflammatory cytokine tumor necrosis factor α (TNFα) by the TNFα convertase (TACE, also referred to as ADAM17) and its regulator, iRhom2...
May 18, 2018: Blood
https://www.readbyqxmd.com/read/29775646/the-rna-binding-protein-ars2-supports-hematopoiesis-at-multiple-levels
#19
Seerat Elahi, Shawn M Egan, G Aaron Holling, Rachel L Kandefer, Michael J Nemeth, Scott H Olejniczak
Recent biochemical characterization of Arsenic resistance protein 2 (Ars2) has established it as central to determining the fate of nascent RNA polymerase II (RNAPII) transcripts. Through interactions with the nuclear 5'-7-methylguanosine (7mG) cap binding complex (CBC), Ars2 promotes co-transcriptional processing coupled with nuclear export or degradation of several classes of RNAPII transcripts, allowing for gene expression programs that facilitate rapid and sustained proliferation of immortalized cells in culture...
May 15, 2018: Experimental Hematology
https://www.readbyqxmd.com/read/29775399/dolutegravir-and-rilpivirine-for-the-maintenance-treatment-of-virologically-suppressed-hiv-1-infection
#20
Jose L Casado, Marta Monsalvo, Aurora M Rojo, María Fontecha, Miguel A Rodriguez-Sagrado
Triple combinations of antiretroviral (ART) drugs are the standard treatment for HIV infection, but the challenges include long-term side effects, high costs, and adherence. The recent advent of potent and well tolerated ART has renewed the interest for newer ART strategies. A dual regimen with the combination of dolutegravir (DTG) and rilpivirine (RPV), two well tolerated, metabolic-friendly, and potent drugs could offer additional benefits. Areas covered: A review of recent randomized trials and observational cohorts concerning the use of a dual therapy with DTG plus RPV as a switching strategy in patients with viral suppression...
May 18, 2018: Expert Review of Clinical Pharmacology
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