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https://www.readbyqxmd.com/read/28203100/from-amino-acids-polymers-antimicrobial-peptides-and-histones-to-their-possible-role-in-the-pathogenesis-of-septic-shock-a-historical-perspective
#1
Isaac Ginsburg, Peter Vernon van Heerden, Erez Koren
This paper describes the evolution of our understanding of the biological role played by synthetic and natural antimicrobial cationic peptides and by the highly basic nuclear histones as modulators of infection, postinfectious sequelae, trauma, and coagulation phenomena. The authors discuss the effects of the synthetic polymers of basic poly α amino acids, poly l-lysine, and poly l-arginine on blood coagulation, fibrinolysis, bacterial killing, and blood vessels; the properties of natural and synthetic antimicrobial cationic peptides as potential replacements or adjuncts to antibiotics; polycations as opsonizing agents promoting endocytosis/phagocytosis; polycations and muramidases as activators of autolytic wall enzymes in bacteria, causing bacteriolysis and tissue damage; and polycations and nuclear histones as potential virulence factors and as markers of sepsis, septic shock, disseminated intravasclar coagulopathy, acute lung injury, pancreatitis, trauma, and other additional clinical disorders...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28115799/traumatic-spinal-injuries-on-farms-patients-treated-in-the-national-spinal-unit-of-ireland-2005-2015
#2
Mark J Berney, Ellen Horstmann, Noelle Cassidy
INTRODUCTION: Farming is a major industry in Ireland, employing 6% of the workforce but accounts for 40% of workplace fatalities (Meredith, 2008).(1) The use of machinery and proximity to large livestock poses significant risk for spinal injuries. This study reviews mechanism of injury, injuries sustained, and the treatment undertaken. RESULTS: Of 31 patients, 26 sustained high-energy injuries with machinery and livestock implicated in the majority of accidents...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28110067/poly-glycerol-sebacate-elastomer-supports-bone-regeneration-by-its-mechanical-properties-being-closer-to-osteoid-tissue-rather-than-to-mature-bone
#3
S H Zaky, K W Lee, J Gao, A Jensen, K Verdelis, Y Wang, A J Almarza, C Sfeir
: Mechanical load influences bone structure and mass. Arguing the importance of load-transduction, we investigated the mechanisms inducing bone formation using an elastomeric substrate. We characterized Poly (glycerol sebacate) (PGS) in-vitro for its mechanical properties, compatibility with osteoprogenitor cells regarding adhesion, proliferation, differentiation under compression versus static cultures and in-vivo for the regeneration of a rabbit ulna critical size defect. The load-transducing properties of PGS were compared in-vitro to a stiffer poly lactic-co- glycolic-acid (PLA/PGA) scaffold of similar porosity and interconnectivity...
January 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28088378/antimicrobial-coated-implants-in-trauma-and-orthopaedics-a-clinical-review-and-risk-benefit-analysis
#4
REVIEW
Volker Alt
Implant-associated infections remain a major issue in orthopaedics and antimicrobial functionalization of the implant surface by antibiotics or other anti-infective agents have gained interest. The goal of this article is to identify antimicrobial coatings, for which clinical data are available and to review their clinical need, safety profile, and their efficacy to reduce infection rates. PubMed database of the National Library of Medicine was searched for clinical studies on antimicrobial coated implants for internal fracture fixation devices and endoprostheses for bone surgery, for which study design, level of evidence, biocompatibility, development of resistance, and effectiveness to reduce infection rates were analyzed...
December 21, 2016: Injury
https://www.readbyqxmd.com/read/28032224/asymmetric-c7-pedicle-subtraction-osteotomy-for-correction-of-rigid-cervical-coronal-imbalance-secondary-to-post-traumatic-heterotopic-ossification-a-case-report-description-of-a-novel-surgical-technique-and-literature-review
#5
Alexander A Theologis, Kate D Bellevue, Erion Qamirani, Christopher P Ames, Vedat Deviren
PURPOSE: Deformities of the cervical spine are uncommon in the coronal plane. In this report, a unique case of a 31-year-old male with a fixed, 30° left coronal deformity due to heterotopic ossification 3 years status post poly-trauma was treated with an asymmetric C7 pedicle subtraction osteotomy (PSO). METHODS: Case report. RESULTS: Pre-operatively, the patient had a fixed 45-degree left tilt of his neck and radiographs demonstrated a rigid 30° scoliosis, 7 cm coronal imbalance, and 4 cm negative sagittal balance, diffuse bridging bone between the spinous processes and the facet joints of C5 to T1 bilaterally...
December 28, 2016: European Spine Journal
https://www.readbyqxmd.com/read/28032120/inhibition-of-poly-adp-ribosylation-fails-to-increase-axonal-regeneration-or-improve-functional-recovery-after-adult-mammalian-cns-injury
#6
Xingxing Wang, Yuichi Sekine, Alexandra B Byrne, William B J Cafferty, Marc Hammarlund, Stephen M Strittmatter
After traumatic damage of the brain or spinal cord, many surviving neurons are disconnected, and recovery of function is limited by poor axon regeneration. Recent data have suggested that poly ADP-ribosylation plays a role in limiting axonal regrowth such that inhibition of poly (ADP-ribose) polymerase (PARP) may have therapeutic efficacy for neurological recovery after trauma. Here, we tested systemic administration of the PARP inhibitor, veliparib, and showed effective suppression of PARylation in the mouse CNS...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28030486/non-human-primate-model-of-poly-traumatic-hemorrhagic-shock-recapitulates-early-platelet-dysfunction-observed-following-severe-injury-in-humans
#7
Leasha J Schaub, Hunter B Moore, Andrew P Cap, Jacob J Glaser, Ernest E Moore, Forest R Sheppard
BACKGROUND: Platelet dysfunction has been described as an early component of trauma induced coagulopathy (TIC). The platelet component of TIC remains to be fully elucidated and translatable animal models are required to facilitate mechanistic investigations. We sought to determine if the early platelet dysfunction described in trauma patients could be recapitulated in an non-human primate (NHP) model of poly-traumatic hemorrhagic shock. METHODS: Twenty-four male Rhesus Macaques weighting 7-14 kilograms were subjected to 60 minutes (min) severe pressure-targeted controlled hemorrhagic shock (HS) with and without other injuries...
December 23, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27992836/deconstructing-vulnerability-for-psychosis-meta-analysis-of-environmental-risk-factors-for-psychosis-in-subjects-at-ultra-high-risk
#8
P Fusar-Poli, M Tantardini, S De Simone, V Ramella-Cravaro, D Oliver, J Kingdon, M Kotlicka-Antczak, L Valmaggia, J Lee, M J Millan, S Galderisi, U Balottin, V Ricca, P McGuire
BACKGROUND: Subjects at ultra high-risk (UHR) for psychosis have an enhanced vulnerability to develop the disorder but the risk factors accounting for this accrued risk are undetermined. METHOD: Systematic review of associations between genetic or environmental risk factors for psychosis that are widely established in the literature and UHR state, based on comparisons to controls. RESULTS: Forty-four studies encompassing 170 independent datasets and 54 risk factors were included...
December 16, 2016: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/27913446/use-of-bioresorbable-implants-for-orbital-fracture-reconstruction
#9
Stephanie M Young, Gangadhara Sundar, Thiam-Chye Lim, Stephanie S Lang, George Thomas, Shantha Amrith
PURPOSE: Bioresorbable implants offer several advantages over permanent implants and serve as a useful alternative in the reconstruction of orbital fractures. Our aim of the study was to evaluate the clinical effectiveness and safety of various bioresorbable implants in the repair of orbital fractures. METHODS: A retrospective review of all patients who had undergone orbital fracture repair with bioresorbable implants in a single tertiary trauma centre from January 2005 to December 2014 was performed...
December 2, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27904474/poly-adp-ribose-polymerase-inhibition-reveals-a-potential-mechanism-to-promote-neuroprotection-and-treat-neuropathic-pain
#10
REVIEW
Prashanth Komirishetty, Aparna Areti, Ranadeep Gogoi, Ramakrishna Sistla, Ashutosh Kumar
Neuropathic pain is triggered by the lesions to peripheral nerves which alter their structure and function. Neuroprotective approaches that limit the pathological changes and improve the behavioral outcome have been well explained in different experimental models of neuropathy but translation of such strategies to clinics has been disappointing. Experimental evidences revealed the role of free radicals, especially peroxynitrite after the nerve injury. They provoke oxidative DNA damage and consequent over-activation of the poly(ADP-ribose) polymerase (PARP) upregulates pro-inflammatory pathways, causing bioenergetic crisis and neuronal death...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27895899/oxidatively-degradable-poly-thioketal-urethane-ceramic-composite-bone-cements-with-bone-like-strength
#11
Madison A P McEnery, Sichang Lu, Mukesh K Gupta, Katarzyna J Zienkiewicz, Joseph C Wenke, Kerem N Kalpakci, Daniel Shimko, Craig L Duvall, Scott A Guelcher
Synthetic bone cements are commonly used in orthopaedic procedures to aid in bone regeneration following trauma or disease. Polymeric cements like PMMA provide the mechanical strength necessary for orthopaedic applications, but they are not resorbable and do not integrate with host bone. Ceramic cements have a chemical composition similar to that of bone, but their brittle mechanical properties limit their use in weight-bearing applications. In this study, we designed oxidatively degradable, polymeric bone cements with mechanical properties suitable for bone tissue engineering applications...
2016: RSC Advances
https://www.readbyqxmd.com/read/27780110/latent-classes-of-childhood-poly-victimization-and-associations-with-suicidal-behavior-among-adult-trauma-victims-moderating-role-of-anger
#12
Ruby Charak, Brianna M Byllesby, Michelle E Roley, Meredith A Claycomb, Tory A Durham, Jana Ross, Cherie Armour, Jon D Elhai
The aims of the present study were first to identify discrete patterns of childhood victimization experiences including crime, child maltreatment, peer/sibling victimization, sexual violence, and witnessing violence among adult trauma victims using latent class analysis; second, to examine the association between class-membership and suicidal behavior, and third to investigate the differential role of dispositional anger on the association between class-membership and suicidal behavior. We hypothesized that those classes with accumulating exposure to different types of childhood victimization (e...
December 2016: Child Abuse & Neglect
https://www.readbyqxmd.com/read/27712995/combination-strategy-of-parp-inhibitor-with-antioxidant-prevent-bioenergetic-deficits-and-inflammatory-changes-in-cci-induced-neuropathy
#13
Prashanth Komirishetty, Aparna Areti, Ranadeep Gogoi, Ramakrishna Sistla, Ashutosh Kumar
Neuropathic pain, a debilitating pain condition and the underlying pathogenic mechanisms are complex and interwoven amongst each other and still there is scant information available regarding therapies which promise to treat the condition. Evidence indicate that oxidative/nitrosative stress induced poly (ADP-ribose) polymerase (PARP) overactivation initiate neuroinflammation and bioenergetic crisis culminating into neurodegenerative changes following nerve injury. Hence, we investigated the therapeutic effect of combining an antioxidant, quercetin and a PARP inhibitor, 4-amino 1, 8-naphthalimide (4-ANI) on the hallmark deficits induced by chronic constriction injury (CCI) of sciatic nerve in rats...
February 2017: Neuropharmacology
https://www.readbyqxmd.com/read/27698643/foreign-body-reaction-and-osteolysis-in-dorsal-lunate-dislocation-repair-with-bioabsorbable-suture-anchor
#14
Ezequiel Ernesto Zaidenberg, Pablo Roitman, Gerardo Luis Gallucci, Jorge Guillermo Boretto, Pablo De Carli
Background: In recent years the use of biodegradable suture anchors for treating tendon and ligament pathology in hand surgery became popular. These materials are biocompatible, radiolucent, and load sharing, as they incrementally transfer load to surrounding bone during the resorption process. Despite these numerous advantages, polyglycolic (PGA) and poly-L-lactic acid (PLLA) have become a problem because of the potential risk for foreign body reactions. Methods: This article presents a case of an intraosseous foreign body reaction and massive osteolysis of the proximal carpal after dorsal lunate dislocation repair with bioabsorbable suture anchors...
September 2016: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/27679751/plastic-surgery-challenges-in-war-wounded-i-flap-based-extremity-reconstruction
#15
Jennifer M Sabino, Julia Slater, Ian L Valerio
Scope and Significance: Reconstruction of traumatic injuries requiring tissue transfer begins with aggressive resuscitation and stabilization. Systematic advances in acute casualty care at the point of injury have improved survival and allowed for increasingly complex treatment before definitive reconstruction at tertiary medical facilities outside the combat zone. As a result, the complexity of the limb salvage algorithm has increased over 14 years of combat activities in Iraq and Afghanistan. Problem: Severe poly-extremity trauma in combat casualties has led to a large number of extremity salvage cases...
September 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/27561247/orthopaedic-nursing-challenges-in-poly-traumatised-patient-management-a-critical-analysis-of-an-orthopaedic-and-trauma-unit
#16
Carlo Biz, Lisa Buffon, Roberto Marin, Natalia Petrova
INTRODUCTION AND BACKGROUND: Trauma is the most frequent cause of death in people under 40 years old. It is an important problem not only because of the high mortality but also because of the consequential disability that can lead to serious economic consequences. STUDY AIMS: This descriptive, comparative study investigates the definitive management of poly-traumatised patients in an Italian Orthopaedic Ward in order to highlight its strengths and weaknesses in comparison with the most recent literature...
November 2016: International Journal of Orthopaedic and Trauma Nursing
https://www.readbyqxmd.com/read/27502024/occlusive-bandaging-of-wounds-with-decreased-circulation-promotes-growth-of-anaerobic-bacteria-and-necrosis-case-report
#17
Fariba Nayeri
BACKGROUND: Topical occlusive/semi-occlusive dressings that induce a damp and trapped environment are widely used in wound treatment. Subjecting the wound with impaired circulation to such trapped/air-free environment potentiates the growth of anaerobic bacteria and risk for serious infection. CASE PRESENTATION: We present a case of previously healthy Swedish male that had a muscle contusion after heavy trauma that induced impaired circulation. The application of an occlusive bandage to the post-traumatic wound on the patient resulted in a poly-microbial anaerobic infection and necrosis...
August 8, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27450741/bioabsorbable-versus-metallic-interference-screws-for-graft-fixation-in-anterior-cruciate-ligament-reconstruction
#18
REVIEW
Pedro Debieux, Carlos E S Franciozi, Mário Lenza, Marcel Jun Tamaoki, Robert A Magnussen, Flávio Faloppa, João Carlos Belloti
BACKGROUND: Anterior cruciate ligament (ACL) tears are frequently treated with surgical reconstruction with grafts, frequently patella tendon or hamstrings. Interference screws are often used to secure the graft in bone tunnels in the femur and tibia. This review examines whether bioabsorbable interference screws give better results than metal interference screws when used for graft fixation in ACL reconstruction. OBJECTIVES: To assess the effects (benefits and harms) of bioabsorbable versus metallic interference screws for graft fixation in ACL reconstruction...
July 24, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27444121/microglial-activation-induced-by-the-alarmin-s100b-is-regulated-by-poly-adp-ribose-polymerase-1
#19
Jianguo Xu, Handong Wang, Seok Joon Won, Jayinee Basu, David Kapfhamer, Raymond A Swanson
Brain injury resulting from stroke or trauma can be exacerbated by the release of proinflammatory cytokines, proteases, and reactive oxygen species by activated microglia. The microglial activation resulting from brain injury is mediated in part by alarmins, which are signaling molecules released from damaged cells. The nuclear enzyme poly(ADP-ribose) polymerase-1 (PARP-1) has been shown to regulate microglial activation after brain injury, and here we show that signaling effects of the alarmin S100B are regulated by PARP-1...
November 2016: Glia
https://www.readbyqxmd.com/read/27435965/injectable-gentamicin-loaded-thermo-responsive-hyaluronic-acid-derivative-prevents-infection-in-a-rabbit-model
#20
Gert-Jan A Ter Boo, Daniel Arens, Willem-Jan Metsemakers, Stephan Zeiter, R Geoff Richards, Dirk W Grijpma, David Eglin, T Fintan Moriarty
UNLABELLED: Despite the use of systemic antibiotic prophylaxis, the surgical fixation of open fractures with osteosynthesis implants is associated with high infection rates. Antibiotic-loaded biomaterials (ALBs) are increasingly used in implant surgeries across medical specialties to deliver high concentrations of antibiotics to the surgical site and reduce the risk of implant-associated infection. ALBs which are either less or not restricted in terms of spatial distribution and which may be applied throughout complex wounds could offer improved protection against infection in open fracture care...
October 1, 2016: Acta Biomaterialia
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