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https://www.readbyqxmd.com/read/28544161/bone-marrow-derived-cells-response-in-proximal-regions-of-nerves-after-peripheral-nerve-injury
#1
Lulu Chen, Jia Cheng, Xiaonan Yang, Xiaolei Jin, Zuoliang Qi, Yu-Qing Jin
In recent years, bone marrow-derived cells have been found to be crucial for peripheral nerve regeneration. After traumatic peripheral nerve injury, bone marrow-derived macrophages quickly infiltrate into the distal regions of nerves. To explore the changes caused by bone marrow-derived cells within the proximal regions of the nerves, sciatic nerves of chimeric mice carrying bone marrow cells expressing green fluorescent protein were crushed to observe the infiltration of invading bone marrow-derived cells...
May 24, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28539419/microglia-are-irrelevant-for-neuronal-degeneration-and-axon-regeneration-after-acute-injury
#2
Alexander M Hilla, Heike Diekmann, Dietmar Fischer
The role of microglia in de- and regenerative processes after damage of the nervous system still remains ambiguous, partially due to the paucity of appropriate investigative methods. Here, we show that treatment with the pharmacological colony stimulating factor 1 receptor inhibitor PLX5622 specifically eliminated microglia in murine retinae and optic nerves. Interestingly, time course and extent of retinal ganglion cell (RGC) degeneration after optic nerve crush remained unaffected upon microglia depletion, although remnants of pre-labeled apoptotic RGCs were not cleared from the retina in these animals...
May 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28518122/dorsal-root-ganglion-injection-and-dorsal-root-crush-injury-as-a-model-for-sensory-axon-regeneration
#3
Menghon Cheah, James W Fawcett, Melissa R Andrews
Achieving axon regeneration after nervous system injury is a challenging task. As different parts of the central nervous system (CNS) differ from each other anatomically, it is important to identify an appropriate model to use for the study of axon regeneration. By using a suitable model, we can formulate a specific treatment based on the severity of injury, the neuronal cell type of interest, and the desired spinal tract for assessing regeneration. Within the sensory pathway, DRG neurons are responsible for relaying sensory information from the periphery to the CNS...
May 3, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28505206/effects-of-%C3%AE-tat1-and-hdac5-on-axonal-regeneration-in-adult-neurons
#4
Shen Lin, Noelle A Sterling, Ian P Junker, Courtney T Helm, George M Smith
The role of posttranslational modifications in axonal injury and regeneration has been widely studied but there has been little consensus over the mechanism by which each modification affects adult axonal growth. Acetylation is known to play an important role in a variety of neuronal functions and its homeostasis is controlled by two enzyme families: the Histone Deacetylases (HDACs) and Histone Acetyl Transferases (HATs). Recent studies show that HDAC5 deacetylates microtubules in the axonal cytoplasm as part of an injury-induced regeneration response, but little is known about how acetylation of microtubules plays a role...
2017: PloS One
https://www.readbyqxmd.com/read/28501479/risk-factors-for-complex-regional-pain-syndrome-in-patients-with-surgically-treated-traumatic-injuries-attending-hand-therapy
#5
Serpil Savaş, Esra Erkol İnal, Dudu Dilek Yavuz, Fuat Uslusoy, Selman Hakkı Altuntaş, Mustafa Asım Aydın
STUDY DESIGN: Prospective cohort study. INTRODUCTION: Identification of risk factors for CRPS development in patients with surgically treated traumatic injuries attending hand therapy allows to watch at-risk patients more closely for early diagnosis and to take precautionary measures as required. PURPOSE OF THE STUDY: The aim of this study was to evaluate the risk factors for the development of complex regional pain syndrome (CRPS) after surgical treatment of traumatic hand injuries...
May 10, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28492128/validating-the-utilisation-of-venous-bicarbonate-as-a-predictor-of-acute-kidney-injury-in-crush-syndrome-from-sjambok-injuries
#6
David Lee Skinner, Grant L Laing, John Bruce, Bruce Biccard, David J J Muckart
BACKGROUND: Crush injury secondary to sjambok beatings is a well-described phenomenon in southern Africa. Owing to a number of factors, it can result in acute kidney injury (AKI). In 1992, Muckart et al. described a risk stratification system using venous bicarbonate (VB) that can be used in the management of these patients. OBJECTIVE: To validate this score in the modern era of AKI risk stratification. METHODS: A retrospective study was performed on a local trauma database from June 2010 to December 2012...
April 25, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28491019/shared-and-differential-retinal-responses-against-optic-nerve-injury-and-ocular-hypertension
#7
REVIEW
Manuel Vidal-Sanz, Caridad Galindo-Romero, Francisco J Valiente-Soriano, Francisco M Nadal-Nicolás, Arturo Ortin-Martinez, Giuseppe Rovere, Manuel Salinas-Navarro, Fernando Lucas-Ruiz, Maria C Sanchez-Migallon, Paloma Sobrado-Calvo, Marcelino Aviles-Trigueros, María P Villegas-Pérez, Marta Agudo-Barriuso
Glaucoma, one of the leading causes of blindness worldwide, affects primarily retinal ganglion cells (RGCs) and their axons. The pathophysiology of glaucoma is not fully understood, but it is currently believed that damage to RGC axons at the optic nerve head plays a major role. Rodent models to study glaucoma include those that mimic either ocular hypertension or optic nerve injury. Here we review the anatomical loss of the general population of RGCs (that express Brn3a; Brn3a(+)RGCs) and of the intrinsically photosensitive RGCs (that express melanopsin; m(+)RGCs) after chronic (LP-OHT) or acute (A-OHT) ocular hypertension and after complete intraorbital optic nerve transection (ONT) or crush (ONC)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28490837/transcriptional-profiling-at-high-temporal-resolution-reveals-robust-immune-inflammatory-responses-during-rat-sciatic-nerve-recovery
#8
Lingyan Xing, Qiong Cheng, Guangbin Zha, Sheng Yi
After peripheral nerve injury, immune/inflammatory responses are triggered, which are critical for nerve regeneration. Despite their importance, the underlying molecular changes in immune/inflammatory responses remain largely unknown. In this study, we systematically analyzed differentially expressed genes in immune/inflammatory-related pathways at high temporal resolution and experimentally validated gene expression changes with RT-PCR following sciatic nerve crush in rats. We found that immune/inflammatory reactions not only occur in the acute injury but also remained activated over two weeks after injury...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28489657/the-pattern-of-orbital-fractures-managed-at-two-referral-centers-in-nairobi-kenya
#9
Wayne Manana, Walter A Odhiambo, Mark L Chindia, Kennedy Koech
Orbital fractures are one of the commonest injuries in mid-face trauma and can lead to significant functional and cosmetic defects. This study was aimed at analyzing the pattern of orbital fractures at 2 referral centers in Nairobi. It was a descriptive prospective hospital-based study of the demographics, etiology, clinico-radiological features, and management modalities among patients presenting with orbital fractures at the University of Nairobi Dental Hospital and Kenyatta National Referral Hospital in Nairobi, Kenya...
May 9, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28469662/combination-therapy-using-evening-primrose-oil-and-electrical-stimulation-to-improve-nerve-function-following-a-crush-injury-of-sciatic-nerve-in-male-rats
#10
Omid Badri, Parviz Shahabi, Jalal Abdolalizadeh, Mohammad Reza Alipour, Hadi Veladi, Mehdi Farhoudi, Mohsen Sharif Zak
Peripheral nerve injuries with a poor prognosis are common. Evening primrose oil (EPO) has beneficial biological effects and immunomodulatory properties. Since electrical activity plays a major role in neural regeneration, the present study investigated the effects of electrical stimulation (ES), combined with evening primrose oil (EPO), on sciatic nerve function after a crush injury in rats. In anesthetized rats, the sciatic nerve was crushed using small haemostatic forceps followed by ES and/or EPO treatment for 4 weeks...
March 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28469661/guinea-pigs-as-an-animal-model-for-sciatic-nerve-injury
#11
Malik Abu Rafee, Amarpal, Prakash Kinjavdekar, Hari Prasad Aithal, Sajad Ahmad Wani, Irfan Ahmad Bhat
The overwhelming use of rat models in nerve regeneration studies is likely to induce skewness in treatment outcomes. To address the problem, this study was conducted in 8 adult guinea pigs of either sex to investigate the suitability of guinea pig as an alternative model for nerve regeneration studies. A crush injury was inflicted to the sciatic nerve of the left limb, which led to significant decrease in the pain perception and neurorecovery up to the 4(th) weak. Lengthening of foot print and shortening of toe spread were observed in the paw after nerve injury...
March 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28464581/-effects-of-vacuum-sealing-drainage-technique-in-acute-and-chronic-suppurative-tenosynovitis-of-hand
#12
H Wang, F Xia, D M Xing, D Ren, W Feng, Y Chen, Z H Xiao, Z M Zhao
Objective: To investigate the effects of vacuum sealing drainage technique in acute and chronic suppurative tenosynovitis of hand. Methods: A total of 9 cases acute and chronic suppurative tenosynovitis patients from January 2013 to April 2015 in Puai Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology were retrospectively reviewed. There were 6 males and 3 females, aging from 27 to 65 years, the average age was 55 years. There were 3 cases of index finger, 3 cases of middle finger, 2 cases of ring finger, 1 case include three fingers...
May 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28463452/the-effects-of-two-different-exercise-programs-on-the-ultrastructural-features-of-the-sciatic-nerve-and-soleus-muscle-after-sciatic-crush
#13
Leandro Viçosa Bonetti, Taís Malysz, Jocemar Ilha, Silvia Barbosa, Matilde Achaval, Maria Cristina Faccioni-Heuser
Peripheral nerve injuries constitute a significant medical problem and the recovery is critically dependent on post-injury treatment. In this study, following sciatic nerve crush, we investigated the effects of a 4-week endurance training program (ET) and balance and coordination training program (BCT) on the ultrastructural features of the sciatic nerve and soleus muscle. The animals were randomly divided into Sham, non-trained (NT), ET, and BCT groups each of which included three animals. Ultra-thin cross and longitudinal sections (70-85 nm) were digitized and analyzed comparatively...
April 30, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28460647/-cannot-ventilate-cannot-intubate-situation-after-penetration-of-the-tongue-root-through-to-the-epipharynx-by-a-surfboard-a-case-report
#14
Yuko Ono, Miha Kunii, Tomohiro Miura, Kazuaki Shinohara
BACKGROUND: Surfing is an increasingly popular activity and surfing-related injuries have increased accordingly. However, to the best of our knowledge, there are no reports of penetrating upper airway injuries in surfers. We present a "cannot ventilate, cannot intubate" situation following penetrating neck injury by a surfboard fin. CASE PRESENTATION: A previously healthy 29-year-old Japanese man was swept off his board by a large wave and his left mandible, tongue root, and right epipharynx were penetrated by the surfboard fin...
May 1, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28458138/quercetin-promotes-motor-and-sensory-function-recovery-following-sciatic-nerve-crush-injury-in-c57bl-6j-mice
#15
Ming-Ming Chen, Jing Qin, Shu-Jian Chen, Le-Meng Yao, Lu-Yong Zhang, Zhi-Qi Yin, Hong Liao
Injuries and diseases that occur in the nervous system are common and have few effective treatments. Previous studies have shown that quercetin has a therapeutic effect on nervous system injuries, but its potential effects on and mechanisms of action related to behavioral recovery and axonal regrowth have not been investigated. Here, we showed that quercetin administration promotes behavioral recovery following sciatic nerve-crush injury in mice. Long-term evaluation showed that mice administered 20 mg·kg(-1)·day(-1) quercetin for 35 days had a greater sensorimotor recovery compared with all other treatment groups...
April 17, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28450098/crush-injuries-of-the-hand
#16
REVIEW
Avi D Goodman, Christopher J Got, Arnold-Peter C Weiss
Crush injuries of the hand are a rare but devastating phenomenon, with historically poor outcomes. A compressive force, usually caused by a high-energy mechanism such as a motor vehicle or industrial accident, crushes and transiently increases the pressures within the hand. This force acts on the incompressible blood in the vasculature and leads to a dramatic rise in tissue pressures and damage to multiple tissue types, including bones, blood vessels, nerves, and soft tissues. A wide zone of injury results from a delayed inflammatory reaction involving the zone bordering the crushed cells, which may initially belie the severity of the injury...
April 25, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28447247/the-role-of-peripheral-myelin-protein-2-in-remyelination
#17
Mark Stettner, Jennifer Zenker, Fabian Klingler, Fabian Szepanowski, Hans-P Hartung, Anne K Mausberg, Christoph Kleinschnitz, Roman Chrast, Bernd C Kieseier
The protein component of the myelin layer is essential for all aspects of peripheral nerves, and its deficiency can lead to structural and functional impairment. The presence of peripheral myelin protein 2 (P2, PMP2, FABP8, M-FABP) in Schwann cells has been known for decades and shown recently to be involved in the lipid homeostasis in the peripheral neural system. However, its precise role during de- and remyelination has yet to be elucidated. To this end, we assessed remyelination after sciatic nerve crush injury in vivo, and in an experimental de/remyelination ex vivo myelinating culture model in P2-deficient (P2 (-/-) ) and wild-type (WT) animals...
April 26, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28445714/the-toll-like-receptor-2-agonist-pam3csk4-is-neuroprotective-after-spinal-cord-injury
#18
Nicole S Stivers, Nicolas Pelisch, Ben C Orem, Joshua Williams, Jacqueline M Nally, David P Stirling
Microglia/macrophage activation and recruitment following spinal cord injury (SCI) is associated with both detrimental and reparative functions. Stimulation of the innate immune receptor Toll-like receptor-2 (TLR2) has shown to be beneficial following SCI, and it increases axonal regeneration following optic nerve crush. However, the mechanism(s) remain unclear. As microglia express high levels of TLR2, we hypothesized that modulating the microglial response to injury using a specific TLR2 agonist, Pam3CSK4, would prevent secondary-mediated white matter degeneration following SCI...
April 23, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28445364/n-acetylcysteine-prevents-retrograde-motor-neuron-death-after-neonatal-peripheral-nerve-injury
#19
Joseph Catapano, Jennifer Zhang, David Scholl, Cameron Chiang, Tessa Gordon, Gregory H Borschel
BACKGROUND: Neuronal death may be an overlooked and unaddressed component of disability following neonatal nerve injuries, such as obstetric brachial plexus injury. N-acetylcysteine and acetyl-L-carnitine improve survival of neurons after adult nerve injury, but it is unknown whether they improve survival after neonatal injury, when neurons are most susceptible to retrograde neuronal death. The authors' objective was to examine whether N-acetylcysteine or acetyl-L-carnitine treatment improves survival of neonatal motor or sensory neurons in a rat model of neonatal nerve injury...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28441398/the-effects-of-immune-protein-cd3%C3%AE-development-and-degeneration-of-retinal-neurons-after-optic-nerve-injury
#20
Tao He, Xavier Mortensen, Ping Wang, Ning Tian
Major histocompatibility complex (MHC) class I molecules and their receptors play fundamental roles in neuronal death during diseases. T-cell receptors (TCR) function as MHCI receptor on T-cells and both MHCI and a key component of TCR, CD3ζ, are expressed by mouse retinal ganglion cells (RGCs) and displaced amacrine cells. Mutation of these molecules compromises the development of RGCs. We investigated whether CD3ζ regulates the development and degeneration of amacrine cells after RGC death. Surprisingly, mutation of CD3ζ not only impairs the proper development of amacrine cells expressing CD3ζ but also those not expressing CD3ζ...
2017: PloS One
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