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https://www.readbyqxmd.com/read/29316834/delayed-administration-of-bq788-an-etb-antagonist-after-experimental-traumatic-brain-injury-promotes-recovery-of-blood-brain-barrier-function-and-reduction-of-cerebral-edema-in-mice
#1
Shotaro Michinaga, Akimasa Kimura, Shunichi Hatanaka, Shizuho Minami, Arisa Asano, Yuki Ikushima, Shingo Matsui, Yoshiya Toriyama, Manami Fujii, Yutaka Koyama
Traumatic brain injury (TBI) is induced by immediate physical disruption of brain tissue, and causes death and disability. Studies on experimental TBI animal models show that disruption of the blood-brain barrier (BBB) underlies brain edema and neuroinflammation during the delayed phase of TBI. In neurological disorders, endothelin-1 (ET-1) is involved in BBB dysfunction and brain edema. In this study, the effect of ET antagonists on BBB dysfunction and brain edema were examined in a mouse focal TBI model using lateral fluid percussion injury (FPI)...
January 9, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29303440/predictive-value-of-positive-high-sensitivity-troponin-t-in-intubated-traumatic-brain-injury-patients
#2
Ayman El-Menyar, Mohammad Asim, Rifat Latifi, Shrikant I Bangdiwala, Hassan Al-Thani
OBJECTIVE The clinical relevance of high-sensitivity troponin T (HsTnT) in trauma patients is not well explored. In this study, the authors aimed to study the predictive value of serum HsTnT in intubated patients who had sustained traumatic brain injury (TBI). METHODS A retrospective analysis was conducted for all intubated TBI patients between 2010 and 2014 at a national level 1 trauma center. Data were analyzed and compared based on the HsTnT status on admission (group 1, negative results; and group 2, positive results)...
January 5, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29295651/mcc950-the-selective-nlrp3-inflammasome-inhibitor-protects-mice-against-traumatic-brain-injury
#3
Saifudeen Ismael, Sanaz Nasoohi, Tauheed Ishrat
NNucleotide oligomerization domain (NOD)-like receptor protein-3 (NLRP3) inflammasome may intimately contribute to sustaining damage following traumatic brain injury (TBI). This study aims to examine whether specific modulation of NLPR3 inflammasome by MCC950, a novel selective NLRP3 inhibitor confers protection after experimental TBI. Unilateral cortical impact injury was induced in young adult C57BL/6 mice. MCC950 (50 mg/kg, i.p.) or saline was administration at 1 h and 3 h post TBI. Animals were tested for neurological function, and then sacrificed for edema at 24 or 72 h post TBI...
January 2, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29262441/imaging-in-neurocritical-care-practice
#4
Craig Williamson, Larry Morgan, Joshua P Klein
The use of neuroimaging in conjunction with serial neurological examinations is a core component of modern neurocritical care practice. Although there is a growing role for other neuromonitoring techniques, the ability to quickly and accurately interpret images in the context of a patient's clinical status arguably remains the indispensable skill for neurocritical care practitioners. Due to its rapid acquisition time and excellent ability to detect intracerebral hemorrhage (ICH), cerebral edema, and signs of elevated intracranial pressure, computed tomography (CT) remains the most useful neuroimaging technique for intensive care unit (ICU) patients...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29251707/transcriptomic-changes-following-valproic-acid-treatment-promote-neurogenesis-and-minimize-secondary-brain-injury
#5
Vahagn C Nikolian, Isabel S Dennahy, Gerald A Higgins, Aaron M Williams, Michael Weykamp, Patrick E Georgoff, Hassan Eidy, Mohamed H Ghandour, Panpan Chang, Hasan B Alam
BACKGROUND: Early treatment with valproic acid (VPA) has demonstrated benefit in pre-clinical models of traumatic brain injury (TBI), including smaller brain lesion size, decreased edema, reduced neurologic disability, and faster recovery. Mechanisms underlying these favorable outcomes are not fully understood. We hypothesized that VPA treatment would upregulate genes involved in cell survival and proliferation and downregulate those associated with cell death and the inflammatory response...
December 14, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29251020/podophyllotoxin-and-rutin-in-combination-prevents-oxidative-stress-mediated-cell-death-and-advances-revival-of-mice-gastrointestine-following-lethal-radiation-injury
#6
Ajaswrata Dutta, Manju Lata Gupta, Savita Verma
Intestinal injury is inevitable during exposure to high radiation doses and is a common side effect observed during abdominal/pelvic radiotherapy. Yet no radiation countermeasures are available for gastrointestine (GI) injury management. The aim of this study is to determine the effects of podophyllotoxin and rutin in combination (G-003M) on ionizing radiation induced GI injury. We prophylactically administered G-003M to C57BL/6J mice exposed to 9-Gy total body radiation (TBI) and assessed for morphological changes, loss in absorption, fluid retention, biochemical alterations, immunohistochemical analysis to study cPARP, caspase-3, PCNA expression and TUNEL staining...
December 17, 2017: Free Radical Research
https://www.readbyqxmd.com/read/29247448/itraq-based-quantitative-proteomics-reveals-the-new-evidence-base-for-traumatic-brain-injury-treated-with-targeted-temperature-management
#7
Shi-Xiang Cheng, Zhong-Wei Xu, Tai-Long Yi, Hong-Tao Sun, Cheng Yang, Ze-Qi Yu, Xiao-Sa Yang, Xiao-Han Jin, Yue Tu, Sai Zhang
This study aimed to investigate the effects of targeted temperature management (TTM) modulation on traumatic brain injury (TBI) and the involved mechanisms using quantitative proteomics technology. SH-SY5Y and HT-22 cells were subjected to moderate stretch injury using the cell injury controller (CIC), followed by incubation at TTM (mild hypothermia, 32°C), or normothermia (37°C). The real-time morphological changes, cell cycle phase distribution, death, and cell viability were evaluated. Moderate TBI was produced by the controlled cortical impactor (CCI), and the effects of TTM on the neurological damage, neurodegeneration, cerebrovascular histopathology, and behavioral outcome were determined in vivo...
December 15, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29222622/toll-like-receptor-4-knockdown-attenuates-brain-damage-and-neuroinflammation-after-traumatic-brain-injury-via-inhibiting-neuronal-autophagy-and-astrocyte-activation
#8
Hongsheng Jiang, Yanzhou Wang, Xin Liang, Xiaofeng Xing, Xiuzhen Xu, Caifeng Zhou
Toll-like receptor 4 (TLR4) has been linked to various pathophysiological conditions, such as traumatic brain injury (TBI). It is reported that posttraumatic neuroinflammation is an essential event in the progression of brain injury after TBI. Recent evidences indicate that TLR4 mediates glial phagocytic activity and inflammatory cytokines production. Thus, TLR4 may be an important therapeutic target for neuroinflammatory injury post-TBI. This study was designed to explore potential effects and underlying mechanisms of TLR4 in rats suffered from TBI...
December 8, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/29210221/heart-rate-sensitive-optical-coherence-angiography-for-measuring-vascular-changes-due-to-posttraumatic-brain-injury-in-mice
#9
Jordi L Tremoleda, Karl Alvarez, Abdirahman Aden, Robert Donnan, Adina T Michael-Titus, Peter H Tomlins
Traumatic brain injury (TBI) results in direct vascular disruption, triggering edema, and reduction in cerebral blood flow. Therefore, understanding the pathophysiology of brain microcirculation following TBI is important for the development of effective therapies. Optical coherence angiography (OCA) is a promising tool for evaluating TBI in rodent models. We develop an approach to OCA that uses the heart-rate frequency to discriminate between static tissue and vasculature. This method operates on intensity data and is therefore not phase sensitive...
December 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29201841/the-combined-use-of-cardiac-output-and-intracranial-pressure-monitoring-to-maintain-optimal-cerebral-perfusion-pressure-and-minimize-complications-for-severe-traumatic-brain-injury
#10
Jin Shup So, Jung-Ho Yun
Objective: To show the effect of dual monitoring including cardiac output (CO) and intracranial pressure (ICP) monitoring for severe traumatic brain injury (TBI) patiens. We hypothesized that meticulous treatment using dual monitoring is effective to sustain maintain minimal intensive care unit (ICU) complications and maintain optimal ICP and cerebral perfusion pressure (CPP) for severe TBI patiens. Methods: We included severe TBI, below Glasgow Coma Scale (GCS) 8 and head abbreviation injury scale (AIS) >4 and performed decompressive craniectomy at trauma ICU of our hospital...
October 2017: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/29201540/erythropoietin-regulates-immune-inflammatory-reaction-and-improves-neurological-function-outcomes-in-traumatic-brain-injury
#11
Zi-Wei Zhou, Fei Li, Zhi-Tong Zheng, Ya-Dan Li, Tong-Heng Chen, Wei-Wei Gao, Jie-Li Chen, Jian-Ning Zhang
Introduction: Traumatic brain injury (TBI) remains a leading cause of disability and death among young people in China. Unfortunately, no specific pharmacological agents to block the progression of secondary brain injury have been approved for clinical treatment. Recently, neuroprotective effects of erythropoietin (EPO) have been demonstrated in addition to its principal function in erythropoiesis, and hence it is viewed as a potential drug for TBI. In this study, we have investigated the neuroprotective effects of EPO associated with immune/inflammatory modulation in a mouse experimental TBI model...
November 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29193450/clostridium-butyricum-exerts-a-neuroprotective-effect-in-a-mouse-model-of-traumatic-brain-injury-via-the-gut-brain-axis
#12
H Li, J Sun, J Du, F Wang, R Fang, C Yu, J Xiong, W Chen, Z Lu, J Liu
BACKGROUND: Traumatic brain injury (TBI) is a common occurrence following gastrointestinal dysfunction. Recently, more and more attentions are being focused on gut microbiota in brain and behavior. Glucagon-like peptide-1 (GLP-1) is considered as a mediator that links the gut-brain axis. The aim of this study was to explore the neuroprotective effects of Clostridium butyricum (Cb) on brain damage in a mouse model of TBI. METHODS: Male C57BL/6 mice were subjected to a model of TBI-induced by weight-drop impact head injury and were treated intragastrically with Cb...
November 27, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29181034/fgf2-attenuates-neural-cell-death-via-suppressing-autophagy-after-rat-mild-traumatic-brain-injury
#13
Chonghui Tang, Yudong Shan, Yilan Hu, Zhanjian Fang, Yun Tong, Mengdan Chen, Xiaojie Wei, Xiaojun Fu, Xinlong Xu
Traumatic brain injury (TBI) can lead to physical and cognitive deficits, which are caused by the secondary injury process. Effective pharmacotherapies for TBI patients are still lacking. Fibroblast growth factor-2 (FGF2) is an important neurotrophic factor that can stimulate neurogenesis and angiogenesis and has been shown to have neuroprotective effects after brain insults. Previous studies indicated that FGF2's neuroprotective effects might be related to its function of regulating autophagy. The present study investigated FGF2's beneficial effects in the early stage of rat mild TBI and the underlying mechanisms...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29179621/erythropoietin-attenuates-the-brain-edema-response-following-experimental-traumatic-brain-injury
#14
Jonas Blixt, Eli Gunnarson, Michael Wanecek
Erythropoietin (EPO) has neuroprotective effects in multiple CNS injury models; however EPO's effects on traumatic brain edema are elusive. To explore EPO as an intervention in traumatic brain edema male SD-rats were subjected to blunt, controlled traumatic brain injury (TBI). Animals were randomized to EPO 5000IU/kg or saline (control group) intraperitoneally within 30 minutes after trauma and once daily for 4 consecutive days. Brain MRI, immunohistofluorescence, immunohistochemistry and quantitative protein analysis were performed at day 1 and 4 post trauma...
November 27, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29162596/lactadherin-promotes-microvesicle-clearance-to-prevent-coagulopathy-and-improves-survival-of-severe-tbi-mice
#15
Yuan Zhou, Wei Cai, Zilong Zhao, Tristan Hilton, Min Wang, Jason Yeon, Wei Liu, Fangyi Zhang, Fu-Dong Shi, Xiaoping Wu, Perumal Thiagarajan, Min Li, Jianning Zhang, Jing-Fei Dong
Coagulopathy is common in patients with traumatic brain injury (TBI) and predicts poor clinical outcomes. We have shown that brain-derived extracellular microvesicles, including extracellular mitochondria, play a key role in the development of TBI-induced coagulopathy. Here, we further show in mouse models that the apoptotic cell-scavenging factor lactadherin, given at a single dose of 400 µg/kg 30 min before (preconditioning) or 30 min after cerebral fluid percussion injury, prevented coagulopathy as defined by clotting time, fibrinolysis, intravascular fibrin deposition, and microvascular bleeding of the lungs...
November 21, 2017: Blood
https://www.readbyqxmd.com/read/29159715/does-the-administration-of-melatonin-during-post-traumatic-brain-injury-affect-cytokine-levels
#16
Fatemeh Dehghan, Nader Shahrokhi, Mohammad Khaksari, Zahra Soltani, Gholamreza Asadikorom, Ali Najafi, Nava Shahrokhi
Increased levels of inflammatory cytokines after traumatic brain injury (TBI) can lead to brain edema and neuronal death. In this study, the effect of melatonin on pro-inflammatory (IL-1ß, IL-6, and TNF-α) and anti-inflammatory (IL-10) cytokines following TBI was investigated considering anti-inflammatory effect of melatonin. Male Wistar rats were divided into five groups: Sham, TBI, TBI + VEH (vehicle), TBI + 5 mg dose of melatonin (MEL5), TBI + 20 mg dose of melatonin (MEL20). Diffuse TBI was induced by Marmarou method...
November 20, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29150743/differential-response-of-neural-cells-to-trauma-induced-swelling-in-vitro
#17
A R Jayakumar, M Taherian, K S Panickar, N Shamaladevi, M E Rodriguez, B G Price, M D Norenberg
Brain edema and the associated increase in intracranial pressure are major consequences of traumatic brain injury (TBI) that accounts for most early deaths after TBI. We recently showed that acute severe trauma to cultured astrocytes results in cell swelling. We further examined whether trauma induces cell swelling in neurons and microglia. We found that severe trauma also caused cell swelling in cultured neurons, whereas no swelling was observed in microglia. While severe trauma caused cell swelling in both astrocytes and neurons, mild trauma to astrocytes, neurons, and microglia failed to cell swelling...
November 17, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/29138458/low-intensity-pulsed-ultrasound-improves-behavioral-and-histological-outcomes-after-experimental-traumatic-brain-injury
#18
Wei-Shen Su, Chun-Hu Wu, Szu-Fu Chen, Feng-Yi Yang
The purpose of this study was to investigate the neuroprotective effects of low-intensity pulsed ultrasound (LIPUS) on behavioral and histological outcomes in a mouse model of traumatic brain injury (TBI). Mice subjected to controlled cortical impact injury were treated with LIPUS in the injured region daily for a period of 4 weeks. The effects of LIPUS on edema were observed by MR imaging in the mouse brain at 1 and 4 days following TBI. Brain water content, blood-brain barrier permeability, histology analysis, and behavioral studies were performed to assess the effects of LIPUS...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29113926/the-role-of-microrna-in-traumatic-brain-injury
#19
REVIEW
Yuan-Bo Pan, Zhao-Liang Sun, Dong-Fu Feng
Traumatic brain injury (TBI) is a public health problem that causes high mortality and disability worldwide. Secondary brain damage from this type of injury may cause brain edema, blood-brain barrier destruction, and neurological dysfunction. MicroRNAs (miRNAs) are a class of small non-coding RNAs that regulate gene expression at the post-transcriptional level and play vital roles in maintaining and regulating physiological function. Notably, studies suggest that miRNA levels are altered in the cerebral cortex and hippocampus of rats and mice after TBI...
December 26, 2017: Neuroscience
https://www.readbyqxmd.com/read/29079445/selective-activation-of-cannabinoid-receptor-2-reduces-neuroinflammation-after-traumatic-brain-injury-via-alternative-macrophage-polarization
#20
Molly Braun, Zenab T Khan, Mohammad B Khan, Manish Kumar, Ayobami Ward, Bhagelu R Achyut, Ali S Arbab, David C Hess, Md Nasrul Hoda, Babak Baban, Krishnan M Dhandapani, Kumar Vaibhav
Inflammation is an important mediator of secondary neurological injury after traumatic brain injury (TBI). Endocannabinoids, endogenously produced arachidonate based lipids, have recently emerged as powerful anti-inflammatory compounds, yet the molecular and cellular mechanisms underlying these effects are poorly defined. Endocannabinoids are physiological ligands for two known cannabinoid receptors, CB1R and CB2R. In the present study, we hypothesized that selective activation of CB2R attenuates neuroinflammation and reduces neurovascular injury after TBI...
October 24, 2017: Brain, Behavior, and Immunity
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