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https://www.readbyqxmd.com/read/28416649/optic-nerve-astrocyte-reactivity-protects-function-in-experimental-glaucoma-and-other-nerve-injuries
#1
Daniel Sun, Sara Moore, Tatjana C Jakobs
Reactive remodeling of optic nerve head astrocytes is consistently observed in glaucoma and other optic nerve injuries. However, it is unknown whether this reactivity is beneficial or harmful for visual function. In this study, we used the Cre recombinase (Cre)-loxP system under regulation of the mouse glial fibrillary acidic protein promoter to knock out the transcription factor signal transducer and activator of transcription 3 (STAT3) from astrocytes and test the effect this has on reactive remodeling, ganglion cell survival, and visual function after experimental glaucoma and nerve crush...
April 17, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28412609/dexamethasone-promotes-regeneration-of-crushed-inferior-alveolar-nerve-by-inhibiting-nf-%C3%AE%C2%BAb-activation-in-adult-rats
#2
Wei Gao, Dongdong Tong, Qing Li, Ping Huang, Fenghe Zhang
PURPOSE: Nuclear factor kappa B (NF-κB), which is closely related to inflammation, has become a topic of interest for research. The aim of this study is to investigate the effects of dexamethasone (Dex), an inhibitor of NF-κB, on inferior alveolar nerve injury in adult rats. MATERIALS AND METHODS: The crushed inferior alveolar model is established in Wistar rats and they are randomly divided into three groups according to treatment: pyrrolidine dithiocarbamate (PDTC), dexamethasone (Dex), and saline (physiological saline)...
April 6, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28410938/preservation-of-devitalized-bone-in-necrotic-digits-following-crush-injury-with-free-tissue-transfer
#3
Fei Song, Yongwei Pan, Zhe Zhao, Jiuzheng Deng, Changjiao Sun
Traditional management of necrotic digits has been to allow demarcation between viable and nonviable tissues to occur, and thus to indicate the level of amputation required. In this case report, the phalangeal length of the necrotic thumb was maintained in 2 patients who had sustained crush injury. After nonviable soft tissues were debrided, the devitalized bones were covered with soft tissue flaps. All wounds healed without infection. Both cosmetic and functional results of the reconstructed thumbs were satisfactory...
April 12, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28400667/epidemiology-of-lower-limb-musculoskeletal-trauma-with-associated-vascular-injuries-in-a-tertiary-care-institute-in-india
#4
Nirmal Raj Gopinathan, Siva Swaminathan Santhanam, Balaji Saibaba, Mandeep Singh Dhillon
BACKGROUND: Vascular trauma associated with bony injuries is an orthopaedic emergency. Lack of timely intervention can lead to loss of limb or even life. Inspite of the rising incidence of high speed road traffic accidents in India, there is paucity of literature regarding the demographic pattern, clinical morbidity, management strategies and outcome of arterial injuries associated with lower limb trauma. The aim of this study is to describe the epidemiology and outcome of lower extremity musculoskeletal trauma with associated vascular injuries in a tertiary care institute in India...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28399654/long-term-outcomes-following-syme-s-amputation
#5
Elissa S Finkler, Daniel A Marchwiany, Adam P Schiff, Michael S Pinzur
BACKGROUND: The metabolic cost of walking after Syme's ankle disarticulation amputation is minimally more than that for nonamputation. The ability to end weightbearing makes prosthetic fitting relatively simple, and very few patients require extensive rehabilitation or placement in a skilled nursing or rehabilitation facility. In spite of these potential benefits, there is a paucity of objective information on the actual long-term outcomes. METHODS: Fifty-one patients were identified who underwent single-stage Syme's ankle disarticulation amputation with excision of the lateral and medial malleoli by a single surgeon during a 23-year period...
April 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28390650/garlic-burn-of-the-oral-mucosa-a-case-report-and-review-of-self-treatment-chemical-burns
#6
Richard J Vargo, Blake M Warner, Anitha Potluri, Joanne L Prasad
BACKGROUND AND OVERVIEW: Inappropriate self-treatment with topically applied therapeutic or nontherapeutic agents frequently results in mucosal burns. Although such chemical burns typically are associated with misuse of analgesics, investigators also have reported them in conjunction with topical application of a variety of other agents. CASE DESCRIPTION: The authors report an unusual case of a 49-year-old man seeking care for maxillary tooth pain who had an oral mucosal burn of the maxillary vestibule caused by topical application of crushed raw garlic...
April 5, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28377608/electrical-brain-stimulation-induces-dendritic-stripping-but-improves-survival-of-silent-neurons-after-optic-nerve-damage
#7
Petra Henrich-Noack, Elena G Sergeeva, Torben Eber, Qing You, Nadine Voigt, Jürgen Köhler, Sebastian Wagner, Stefanie Lazik, Christian Mawrin, Guihua Xu, Sayantan Biswas, Bernhard A Sabel, Christopher Kai-Shun Leung
Repetitive transorbital alternating current stimulation (rtACS) improves vision in patients with chronic visual impairments and an acute treatment increased survival of retinal neurons after optic nerve crush (ONC) in rodent models of visual system injury. However, despite this protection no functional recovery could be detected in rats, which was interpreted as evidence of "silent survivor" cells. We now analysed the mechanisms underlying this "silent survival" effect. Using in vivo microscopy of the retina we investigated the survival and morphology of fluorescent neurons before and after ONC in animals receiving rtACS or sham treatment...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28377600/low-level-laser-facilitates-alternatively-activated-macrophage-microglia-polarization-and-promotes-functional-recovery-after-crush-spinal-cord-injury-in-rats
#8
Ji Wei Song, Kun Li, Zhuo Wen Liang, Chen Dai, Xue Feng Shen, Yu Ze Gong, Shuang Wang, Xue Yu Hu, Zhe Wang
Macrophages and resident microglia play an import role in the secondary neuroinflammation response following spinal cord injury. Reprogramming of macrophage/microglia polarization is an import strategy for spinal cord injury restoration. Low-level laser therapy (LLLT) is a noninvasive treatment that has been widely used in neurotrauma and neurodegenerative diseases. However, the influence of low-level laser on polarization of macrophage/microglia following spinal cord injury remains unknown. The present study applied low-level laser therapy on a crush spinal cord injury rat model...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28377582/nociceptive-drg-neurons-express-muscle-lim-protein-upon-axonal-injury
#9
Evgeny Levin, Anastasia Andreadaki, Philipp Gobrecht, Frank Bosse, Dietmar Fischer
Muscle lim protein (MLP) has long been regarded as a cytosolic and nuclear muscular protein. Here, we show that MLP is also expressed in a subpopulation of adult rat dorsal root ganglia (DRG) neurons in response to axonal injury, while the protein was not detectable in naïve cells. Detailed immunohistochemical analysis of L4/L5 DRG revealed ~3% of MLP-positive neurons 2 days after complete sciatic nerve crush and maximum ~10% after 4-14 days. Similarly, in mixed cultures from cervical, thoracic, lumbar and sacral DRG ~6% of neurons were MLP-positive after 2 days and maximal 17% after 3 days...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28362972/prevention-of-axonal-degeneration-by-perineurium-injection-of-mitochondria-in-a-sciatic-nerve-crush-injury-model
#10
Chi-Chung Kuo, Hong-Lin Su, Tzu-Lin Chang, Chien-Yi Chiang, Meei-Ling Sheu, Fu-Chou Cheng, Chun-Jung Chen, Jason Sheehan, Hung-Chuan Pan
BACKGROUND: Axon degeneration leads to cytoskeletal disassembly, metabolism imbalance, and mitochondrial dysfunction during neurodegeneration or nerve injury. OBJECTIVE: In this study, we assess the possibility of mitigating axon degeneration by local injection of mitochondria in a crushed sciatic nerve. METHODS: Sciatic nerve explants cocultured with mitochondria were assessed for the optimal dosage in local injection and nerve regeneration potential...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28357590/non-machinery-dialysis-that-achieves-blood-purification-therapy-without-using-full-scale-dialysis-machines
#11
Takaya Abe, Mistutaka Onoda, Tomohiko Matsuura, Jun Sugimura, Wataru Obara, Toshiya Sato, Mihoko Takahashi, Kenta Chiba, Tomiya Abe
An electrical or water supply and a blood purification machine are required for renal replacement therapy. There is a possibility that acute kidney injury can occur in large numbers and on a wide scale in the case of a massive earthquake, and there is the potential risk that the current supply will be unable to cope with acute kidney injury cases. However, non-machinery dialysis requires exclusive circuits and has the characteristic of not requiring the full-scale dialysis machines. We performed perfusion experiments that used non-machinery dialysis and recent blood purification machines in 30-min intervals, and the effectiveness of non-machinery dialysis was evaluated by the assessing the removal efficiency of potassium, which causes lethal arrhythmia during acute kidney injury...
March 29, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28353119/safety-and-feasibility-of-pleural-cryobiopsy-compared-to-forceps-biopsy-during-semi-rigid-pleuroscopy
#12
Vikas Pathak, Ray W Shepherd, Ehab Hussein, Rajiv Malhotra
BACKGROUND: Pleural biopsy is often obtained in patients with undiagnosed exudative pleural effusion during pleuroscopy. Standard forceps have been traditionally used for the biopsy. Cryoprobes are being increasingly used for transbronchial lung biopsy as they obtain larger specimens and have less crush artifact. However, the safety and feasibility of cryoprobe biopsy compared to standard forceps for pleural biopsy has not been fully assessed. OBJECTIVES: The objective of this study was to demonstrate the safety and feasibility of cryoprobe biopsy in the pleural space using semi-rigid pleuroscopy...
March 28, 2017: Lung
https://www.readbyqxmd.com/read/28352600/soft-tissue-reconstruction-of-complete-circumferential-defects-of-the-upper-extremity
#13
Zhi Yang Ng, Shaun Shi Yan Tan, Alexandre Gaston Lellouch, Curtis Lisante Cetrulo, Harvey Wei Ming Chim
BACKGROUND: Upper extremity soft tissue defects with complete circumferential involvement are not common. Coupled with the unique anatomy of the upper extremity, the underlying etiology of such circumferential soft tissue defects represent additional reconstructive challenges that require treatment to be tailored to both the patient and the wound. The aim of this study is to review the various options for soft tissue reconstruction of complete circumferential defects in the upper extremity...
March 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28340660/severe-crush-injury-to-the-forearm-and-hand-the-role-of-microsurgery
#14
REVIEW
Francisco Del Piñal, Esteban Urrutia, Maciej Klich
The main goals of treating severe crush injuries are debriding away devitalized tissue and filling any resultant dead space with vascularized tissue. In the authors' experience, the most ideal methods for soft tissue coverage in treating crush injuries are the iliac flap, the adipofascial lateral arm flap, and the gracilis flap. Accompanying bone defects respond very well to free corticoperiosteal flaps. Digital defects often require the use of complete or subtotal toe transfer to avoid amputation and restore function to the hand...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28336261/methane-rescues-retinal-ganglion-cells-and-limits-retinal-mitochondrial-dysfunction-following-optic-nerve-crush
#15
Ruobing Wang, Qinglei Sun, Fangzhou Xia, Zeli Chen, Jiangchun Wu, Yuelu Zhang, Jiajun Xu, Lin Liu
Secondary degeneration is a common event in traumatic central nervous system disorders, which involves neuronal apoptosis and mitochondrial dysfunction. Exogenous methane exerts the therapeutic effects in many organ injury. Our study aims to investigate the potential neuroprotection of methane in a rat model of optic nerve crush (ONC). Adult male Sprague-Dawley rats were subjected to ONC and administrated intraperitoneally with methane-saturated or normal saline (10 ml/kg) once per day for one week after ONC...
March 20, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28333077/an-overview-of-the-protective-effects-of-chitosan-and-acetylated-chitosan-oligosaccharides-against-neuronal-disorders
#16
REVIEW
Cui Hao, Wei Wang, Shuyao Wang, Lijuan Zhang, Yunliang Guo
Chitin is the second most abundant biopolymer on Earth and is mainly comprised of a marine invertebrate, consisting of repeating β-1,4 linked N-acetylated glucosamine units, whereas its N-deacetylated product, chitosan, has broad medical applications. Interestingly, chitosan oligosaccharides have therapeutic effects on different types of neuronal disorders, including, but not limited to, Alzheimer's disease, Parkinson's disease, and nerve crush injury. A common link among neuronal disorders is observed at a sub-cellular level, such as atypical protein assemblies and induced neuronal death...
March 23, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28328632/use-of-processed-nerve-allografts-to-repair-nerve-injuries-greater-than-25-mm-in-the-hand
#17
Brian Rinker, Jozef Zoldos, Renata V Weber, Jason Ko, Wesley Thayer, Jeffrey Greenberg, Fraser J Leversedge, Bauback Safa, Gregory Buncke
Processed nerve allografts (PNAs) have been demonstrated to have improved clinical results compared with hollow conduits for reconstruction of digital nerve gaps less than 25 mm; however, the use of PNAs for longer gaps warrants further clinical investigation. Long nerve gaps have been traditionally hard to study because of low incidence. The advent of the RANGER registry, a large, institutional review board-approved, active database for PNA (Avance Nerve Graft; AxoGen, Inc, Alachua, FL) has allowed evaluation of lower incidence subsets...
March 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28324115/regenerative-responses-and-axon-pathfinding-of-retinal-ganglion-cells-in-chronically-injured-mice
#18
Benjamin J Yungher, Márcio Ribeiro, Kevin K Park
Purpose: Enhanced regeneration of retinal ganglion cell (RGC) axons can be achieved by modification of numerous neuronal-intrinsic factors. However, axon growth initiation and the pathfinding behavior of these axons after traumatic injury remain poorly understood outside of acute injury paradigms, despite the clinical relevance of more chronic settings. We therefore examined RGC axon regeneration following therapeutic delivery that is postponed until 2 months after optic nerve crush injury...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28323803/patient-response-to-an-integrated-orthotic-and-rehabilitation-initiative-for-traumatic-injuries-the-prioriti-mtf-study
#19
Joseph R Hsu, Johnny G Owens, Jennifer DeSanto, John R Fergason, Kevin M Kuhn, Benjamin K Potter, Daniel J Stinner, Robert G Sheu, Sandra L Waggoner, Jason M Wilken, Yanjie Huang, Daniel O Scharfstein, Ellen J MacKenzie
Although limb salvage is now possible for many high-energy open fractures and crush injuries to the distal tibia, ankle, hindfoot, and midfoot, orthotic options are limited. The Intrepid Dynamic Exoskeletal Orthosis (IDEO) is a custom, energy-storing carbon fiber orthosis developed for trauma patients undergoing limb salvage. The IDEO differs from other orthoses in that it allows patients with ankle weakness to have more normal ankle biomechanics and increased ankle power. This article describes the design of a study to evaluate the effectiveness of the IDEO when delivered together with a high-intensity, sports medicine-based approach to rehabilitation...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28322446/increased-long-term-risk-of-hearing-loss-in-patients-with-traumatic-brain-injury-a-nationwide-population-based-study
#20
Wei-Chuan Shangkuan, Hung-Che Lin, Cheng-Ping Shih, Chun-An Cheng, Hueng-Chuen Fan, Chi-Hsiang Chung, Fu-Huang Lin, Chang-Huei Tsao, Wu-Chien Chien
OBJECTIVES/HYPOTHESIS: We investigated incidences of hearing loss among patients with traumatic brain injury (TBI) to evaluate whether they had a higher risk of hearing loss than the general population. STUDY DESIGN: Cohort study. METHODS: Inpatient data from the Taiwan National Health Insurance Research Database from January 1, 2000 to December 31, 2010 were recorded. Patients with TBI and a retrospective comparison cohort were analyzed. Each subject was individually traced from their index date to identify subjects who subsequently received a diagnosis of hearing loss...
March 21, 2017: Laryngoscope
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