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https://www.readbyqxmd.com/read/28524074/neurotrauma-the-crosstalk-between-neurotrophins-and-inflammation-in-the-acutely-injured-brain
#1
REVIEW
Lindolfo da Silva Meirelles, Daniel Simon, Andrea Regner
Traumatic brain injury (TBI) is a major cause of morbidity and mortality among young individuals worldwide. Understanding the pathophysiology of neurotrauma is crucial for the development of more effective therapeutic strategies. After the trauma occurs, immediate neurologic damage is produced by the traumatic forces; this primary injury triggers a secondary wave of biochemical cascades together with metabolic and cellular changes, called secondary neural injury. In the scenario of the acutely injured brain, the ongoing secondary injury results in ischemia and edema culminating in an uncontrollable increase in intracranial pressure...
May 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28464695/mesenchymal-stem-cells-maintain-the-microenvironment-of-central-nervous-system-by-regulating-the-polarization-of-macrophages-microglia-after-traumatic-brain-injury
#2
Chao Xu, Feng Fu, Xiaohong Li, Sai Zhang
Mesenchymal Stem Cells (MSCs), which are regarded as promising candidates for cell replacement therapies, are able to regulate immune responses after traumatic brain injury (TBI). Secondary immune response following the mechanical injury is the essential factor leading to the necrosis and apoptosis of neural cells during and after the cerebral edema has subsided and there is lack of efficient agent that can mitigate such neuroinflammation in the clinical application. By means of three molecular pathways (prostaglandin E2 (PGE2), tumor necrosis factor-inducible gene 6 protein (TSG-6), and progesterone receptor (PR) and glucocorticoid receptors (GR)), MSCs induce the activation of macrophages/microglia and drive them polarize into the M2 phenotypes, which inhibits the release of pro-inflammatory cytokines and promotes tissue repair and nerve regeneration...
May 3, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28455264/using-functional-and-molecular-mri-techniques-to-detect-neuroinflammation-and-neuroprotection-after-traumatic-brain-injury
#3
Wenzhu Wang, Hong Zhang, Doon-Hoon Lee, Jintao Yu, Tian Cheng, Michael Hong, Shanshan Jiang, Heng Fan, Xi Huang, Jinyuan Zhou, Jian Wang
This study was designed to investigate whether functional and molecular MRI techniques are sensitive biomarkers for assessment of neuroinflammation and drug efficacy after traumatic brain injury (TBI) in rats. We subjected rats to a controlled cortical impact model and used behavioral tests, histology, and immunofluorescence to assess whether flavonoid pinocembrin provides cerebral protection and improves functional recovery. Most importantly, we used multiple noninvasive structural, functional, and molecular MRI techniques to examine whether the pinocembrin-related neuroprotection and attenuation of neuroinflammation can be detected in vivo...
April 25, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28429775/fucoxanthin-provides-neuroprotection-in-models-of-traumatic-brain-injury-via-the-nrf2-are-and-nrf2-autophagy-pathways
#4
Li Zhang, Handong Wang, Youwu Fan, Yongyue Gao, Xiang Li, Zhigang Hu, Ke Ding, Yujie Wang, Xiaoliang Wang
Fucoxanthin is abundant in seaweed and is considered as a powerful antioxidant. It has been proposed to possess anti-cancer, anti-obesity and anti-diabetes effects. However, its roles in brain injury models have not been fully understood. The objective of this study was to investigate the neuroprotection of fucoxanthin in models of traumatic brain injury (TBI) and the role of the nuclear factor erythroid 2-related factor 2 (Nrf2)-antioxidant-response element (ARE) and Nrf2-autophagy pathways in the putative neuroprotection...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429734/neuroprotective-pentapeptide-cn-105-is-associated-with-reduced-sterile-inflammation-and-improved-functional-outcomes-in-a-traumatic-brain-injury-murine-model
#5
Daniel T Laskowitz, Haichen Wang, Tony Chen, David T Lubkin, Viviana Cantillana, Tian Ming Tu, Dawn Kernagis, Guanen Zhou, Gary Macy, Bradley J Kolls, Hana N Dawson
At present, there are no proven pharmacological treatments demonstrated to improve long term functional outcomes following traumatic brain injury(TBI). In the setting of non-penetrating TBI, sterile brain inflammatory responses are associated with the development of cerebral edema, intracranial hypertension, and secondary neuronal injury. There is increasing evidence that endogenous apolipoprotein E(apoE) modifies the neuroinflammatory response through its role in downregulating glial activation, however, the intact apoE holoprotein does not cross the blood-brain barrier due to its size...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419985/erythropoietin-derived-peptide-protects-against-acute-lung-injury-after-rat-traumatic-brain-injury
#6
Yuan Liu, Junyu Lu, Xiaoya Wang, Liu Chen, Su Liu, Zhiren Zhang, Wei Yao
BACKGROUND: Traumatic brain injury (TBI) can be complicated by TBI-triggered acute lung injury (ALI), in which inflammation plays a central role. It has been reported that an Erythropoietin-derived peptide (pHBSP) was able to ameliorate TBI; however, its function in TBI-caused ALI has not been reported yet. METHODS: In this study, we studied the effect of pHBSP on TBI-caused ALI by using a weight-drop induced TBI model. At 8 h and 24 h post-TBI, pulmonary edema (PE) and bronchoalveolar lavage fluid (BALF) proteins were measured, and haematoxylin and eosin (H&E) staining of lung sections was carried out...
April 14, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28408366/acute-brain-trauma-lung-injury-and-pneumonia-more-than-just-altered-mental-status-and-decreased-airway-protection
#7
Parker J Hu, Jean-Francois Pittet, Jeffrey D Kerby, Patrick L Bosarge, Brant M Wagener
Traumatic brain injury (TBI) is a major cause of mortality and morbidity worldwide. Even when patients survive the initial insult, there is significant morbidity and mortality secondary to subsequent pulmonary edema, acute lung injury and nosocomial pneumonia. While the relationship between TBI and secondary pulmonary complications is recognized, little is known about the mechanistic interplay of the two phenomena. Changes in mental status secondary to acute brain injury certainly impair airway- and lung-protective mechanisms...
April 13, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28386321/acid-fibroblast-growth-factor-preserves-blood-brain-barrier-integrity-by-activating-the-pi3k-akt-rac1-pathway-and-inhibiting-rhoa-following-traumatic-brain-injury
#8
Fenzan Wu, Zaifeng Chen, Chonghui Tang, Jinjing Zhang, Li Cheng, Hongxia Zuo, Hongyu Zhang, Daqing Chen, Liping Xiang, Jian Xiao, Xiaokun Li, Xinlong Xu, Xiaojie Wei
The blood-brain barrier (BBB) plays important roles in the recovery of traumatic brain injury (TBI) which is a major factor contributing to cerebral edema. Acid fibroblast growth factor (aFGF) contributes to maintain vascular integrity and restores nerve function. However, whether aFGF protects BBB following TBI remains unknown. The purpose of this study was to determine whether exogenous aFGF preserves BBB integrity by activating the PI3K-Akt-Rac1 pathway and inhibiting RhoA after TBI. BBB permeability was assessed using evans blue dye and fluorescein isothiocyanate dextran fluorescence...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28382256/prognostication-of-traumatic-brain-injury-outcomes-in-older-trauma-patients-a-novel-risk-assessment-tool-based-on-initial-cranial-ct-findings
#9
Stanislaw P Stawicki, Thomas R Wojda, John D Nuschke, Ronnie N Mubang, James Cipolla, William S Hoff, Brian A Hoey, Peter G Thomas, Joan Sweeney, Daniel Ackerman, Jonathan Hosey, Steven Falowski
INTRODUCTION: Advanced age has been traditionally associated with worse traumatic brain injury (TBI) outcomes. Although prompt neurosurgical intervention (NSI, craniotomy or craniectomy) may be life-saving in the older trauma patient, it does not guarantee survival and/or return to preinjury functional status. The aim of this study was to determine whether a simple score, based entirely on the initial cranial computed tomography (CCT) is predictive of the need for NSI and key outcome measures (e...
January 2017: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28378621/response-of-the-cerebral-vasculature-following-traumatic-brain-injury
#10
Arjang Salehi, John H Zhang, Andre Obenaus
The critical role of the vasculature and its repair in neurological disease states is beginning to emerge particularly for stroke, dementia, epilepsy, Parkinson's disease, tumors and others. However, little attention has been focused on how the cerebral vasculature responds following traumatic brain injury (TBI). TBI often results in significant injury to the vasculature in the brain with subsequent cerebral hypoperfusion, ischemia, hypoxia, hemorrhage, blood-brain barrier disruption and edema. The sequalae that follow TBI result in neurological dysfunction across a host of physiological and psychological domains...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28343797/early-brain-edema-is-a-predictor-of-in-hospital-mortality-in-traumatic-brain-injury
#11
Brian Tucker, Jill Aston, Megan Dines, Elena Caraman, Marianne Yacyshyn, Mary McCarthy, James E Olson
BACKGROUND: Identifying patients who may progress to a poor clinical outcome will encourage earlier appropriate therapeutic interventions. Brain edema may contribute to secondary injury in traumatic brain injury (TBI) and thus, may be a useful prognostic indicator. OBJECTIVE: We determined whether the presence of brain edema on the initial computed tomography (CT) scan of TBI patients would predict poor in-hospital outcome. METHODS: We performed a retrospective review of all trauma patients with nonpenetrating head trauma at a Level I Trauma Center...
March 23, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28336431/calcium-sensing-receptor-antagonist-nps2390-attenuates-neuronal-apoptosis-though-intrinsic-pathway-following-traumatic-brain-injury-in-rats
#12
Zhaoliang Xue, Zhengfei Song, Yingfeng Wan, Kun Wang, Lianjie Mo, Yirong Wang
Traumatic brain injury (TBI) initiates a complex cascade of neurochemical and signaling changes that leads to neuronal apoptosis, which contributes to poor outcomes for patients with TBI. Previous study indicates that calcium-sensing receptor (CaSR) activation contributes to neuron death in focal cerebral ischemia-reperfusion mice, however, its role in neuronal apoptosis after TBI is not well-established. Using a controlled cortical impact model in rats, the present study was designed to determine the effect of CaSR inhibitor NPS2390 upon neuronal apoptosis after TBI...
March 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28336376/effect-of-anesthetics-on-microglial-activation-and-nanoparticle-uptake-implications-for-drug-delivery-in-traumatic-brain-injury
#13
Gokul Kannan, Siva P Kambhampati, Sapna R Kudchadkar
Traumatic brain injury (TBI) is a serious public health problem, often with devastating consequences for patients and their families. Affordable and timely therapies can have a substantial impact on outcomes in severe TBI. Despite the common use of sedatives and anesthetics in the acute phase of TBI management, their effect on glial cells is not well understood. We investigated the effect of a commonly used sedative, pentobarbital, on glial cells and their uptake of nanoparticles. First, we studied how pentobarbital affects BV2 mouse microglial cells in culture...
March 20, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28315576/control-of-lower-extremity-edema-in-patients-with-diabetes-double-blind-randomized-controlled-trial-assessing-the-efficacy-of-mild-compression-diabetic-socks
#14
Stephanie C Wu, Ryan T Crews, Melissa Skratsky, Julia Overstreet, Sai V Yalla, Michelle Winder, Jacquelyn Ortiz, Charles A Andersen
AIMS: Persons with diabetes frequently present with lower extremity (LE) edema; however, compression therapy is generally avoided for fear of compromising arterial circulation in a population with a high prevalence of peripheral arterial disease. This double blind randomized controlled trial (RCT) assessed whether diabetic socks with mild compression could reduce LE edema in patients with diabetes without negatively impacting vascularity. METHODS: Eighty subjects with LE edema and diabetes were randomized to receive either mild-compression knee high diabetic socks (18-25mmHg) or non-compression knee high diabetic socks...
May 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28261150/intranasal-administration-of-the-antisecretory-peptide-af-16-reduces-edema-and-improves-cognitive-function-following-diffuse-traumatic-brain-injury-in-the-rat
#15
Fredrik Clausen, Hans-Arne Hansson, Johan Raud, Niklas Marklund
A synthetic peptide with antisecretory activity, antisecretory factor (AF)-16, improves injury-related deficits in water and ion transport and decreases intracranial pressure after experimental cold lesion injury and encephalitis although its role in traumatic brain injury (TBI) is unknown. AF-16 or an inactive reference peptide was administrated intranasally 30 min following midline fluid percussion injury (mFPI; n = 52), a model of diffuse mild-moderate TBI in rats. Sham-injured (n = 14) or naïve (n = 24) animals were used as controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28219400/alleviation-of-secondary-brain-injury-posttraumatic-inflammation-and-brain-edema-formation-by-inhibition-of-factor-xiia
#16
Sarah Hopp, Marc W Nolte, Christian Stetter, Christoph Kleinschnitz, Anna-Leena Sirén, Christiane Albert-Weissenberger
BACKGROUND: Traumatic brain injury (TBI) is a devastating neurological condition and a frequent cause of permanent disability. Posttraumatic inflammation and brain edema formation, two pathological key events contributing to secondary brain injury, are mediated by the contact-kinin system. Activation of this pathway in the plasma is triggered by activated factor XII. Hence, we set out to study in detail the influence of activated factor XII on the abovementioned pathophysiological features of TBI...
February 20, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28170180/therapeutic-prospective-of-infused-allogenic-cultured-mesenchymal-stem-cells-in-traumatic-brain-injury-mice-a-longitudinal-proton-magnetic-resonance-spectroscopy-assessment
#17
Sushanta Kumar Mishra, Poonam Rana, Subash Khushu, Gurudutta Gangenahalli
Improved therapeutic assessment of experimental traumatic brain injury (TBI), using mesenchymal stem cells (MSCs), would immensely benefit its therapeutic management. Neurometabolite patterns at injury site, measured with proton magnetic resonance spectroscopy (1H-MRS) after MSCs transplantation, may serve as a bio-indicator of the recovery mechanism. This study used in vivo magnetic resonance imaging and 1H-MRS to evaluate the therapeutic prospects of implanted MSCs at injury site in experimental mice longitudinally up to 21 days...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28157110/connexin40-correlates-with-oxidative-stress-in-brains-of-traumatic-brain-injury-rats
#18
Wei Chen, Yijun Guo, Wenjin Yang, Ping Zheng, Jinsong Zeng, Wusong Tong
BACKGROUND: Oxidative stress is an important factor in the pathophysiologic changes after traumatic brain injury (TBI). Connexin43 (Cx43) was reported to contribute to cerebral damage. However, the impacts of Cx40 have not been investigated in detail. OBJECTIVE: In the present study, we hypothesized that Cx40 was involved in oxidative stress-induced brain injury after TBI. METHODS: The controlled cortical impact (CCI) model was introduced to Wistar rats as a TBI model...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28101166/hsp70-inducer-17-allylamino-demethoxygeldanamycin-provides-neuroprotection-via-anti-inflammatory-effects-in-a-rat-model-of-traumatic-brain-injury
#19
Youquan Gu, Jun Chen, Tianhong Wang, Chaoning Zhou, Zhaodong Liu, Lanhua Ma
Traumatic brain injury (TBI) is the predominant cause of mortality in young adults and children living in China. TBI induces inflammatory responses; in addition, tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and IL-6 are important pro-inflammatory cytokines. Considering the observation that Hsp-70 overexpression can exert neuroprotection, identifying a drug that is able to induce the upregulation of Hsp70 has the potential to be a promising therapy for the treatment of neurological diseases. Thus, the present study assessed the clinical effectiveness of an anticancer drug and Hsp70 activator, 17-allylamino-demethoxygeldanamycin (17-AAG), to evaluate its potential as a treatment for patients with TBI...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28094295/loss-of-pafr-prevents-neuroinflammation-and-brain-dysfunction-after-traumatic-brain-injury
#20
Xiang-Jie Yin, Zhen-Yan Chen, Xiao-Na Zhu, Jin-Jia Hu
Traumatic brain injury (TBI) is a principal cause of death and disability worldwide, which is a major public health problem. Death caused by TBI accounts for a third of all damage related illnesses, which 75% TBI occurred in low and middle income countries. With the increasing use of motor vehicles, the incidence of TBI has been at a high level. The abnormal brain functions of TBI patients often show the acute and long-term neurological dysfunction, which mainly associated with the pathological process of malignant brain edema and neuroinflammation in the brain...
January 17, 2017: Scientific Reports
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