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https://www.readbyqxmd.com/read/28411452/peptide-valency-plays-an-important-role-in-the-activity-of-a-synthetic-fibrin-crosslinking-polymer
#1
Robert J Lamm, Esther B Lim, Katie M Weigandt, Lilo D Pozzo, Nathan J White, Suzie H Pun
Therapeutic polymers have the potential to improve the standard of care for hemorrhage, or uncontrolled bleeding, as synthetic hemostats. PolySTAT, a fibrin-crosslinking peptide-polymer conjugate, has the capacity to rescue fibrin clot formation and improve survival in a model of acute traumatic bleeding. PolySTAT consists of a synthetic polymer backbone to which targeting fibrin-binding peptides are linked. For translation of PolySTAT, the optimal valency of peptides must be determined. Grafting of fibrin-binding peptides to the poly(hydroxyethyl methacrylate)-based backbone was controlled to produce peptide valencies ranging from 0 to 10 peptides per polymer...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28287384/effects-of-potassium-adsorption-filters-on-the-removal-of-ammonia-from-blood-products
#2
Hiroshi Fujita, Yoko Shiotani, Yuko Takada, Shigeko Nishimura
BACKGROUND: Although ammonia in plasma does not usually pass through the blood-brain barrier (BBB), in cases of traumatic brain injury it may do so, acting as a neurotoxin on the brain. Excess intake of ammonia should be restricted in conditions involving BBB breakdown, such as traumatic brain injury. Washing is a method to remove ammonia from blood products, but fresh-frozen plasma and albumin products cannot be washed. A potassium adsorption filter (PAF) can remove not only potassium, but also ammonia from red blood cell solutions...
March 1, 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28283595/astroglial-activation-and-altered-amyloid-metabolism-in-human-repetitive-concussion
#3
Pashtun Shahim, Yelverton Tegner, Niklas Marklund, Kina Höglund, Erik Portelius, David L Brody, Kaj Blennow, Henrik Zetterberg
OBJECTIVE: To determine whether postconcussion syndrome (PCS) due to repetitive concussive traumatic brain injury (rcTBI) is associated with CSF biomarker evidence of astroglial activation, amyloid deposition, and blood-brain barrier (BBB) impairment. METHODS: A total of 47 participants (28 professional athletes with PCS and 19 controls) were assessed with lumbar puncture (median 1.5 years, range 0.25-12 years after last concussion), standard MRI of the brain, and Rivermead Post-Concussion Symptoms Questionnaire (RPQ)...
April 11, 2017: Neurology
https://www.readbyqxmd.com/read/28279078/nano-carrier-mediated-co-delivery-of-methyl-prednisolone-and-minocycline-for-improved-post-traumatic-spinal-cord-injury-conditions-in-rats
#4
Shen Bin, Ningfeng Zhou, Jie Pan, Fumin Pan, Xiao-Feng Wu, Zi-Hui Zhou
OBJECTIVE: The objective of this study is to investigate the fate of albumin coupled nanoparticulate system over non-targeted drug carrier in the treatment of hemisectioned spinal cord injury (SCI). SIGNIFICANCE: Targeted delivery of methyl prednisolone (MP) and minocycline (MC) portrayed improved therapeutic efficacy as compared with non-targeted nanoparticles (NPS). METHODS: Albumin coupled, chitosan stabilized, and cationic NPS (albumin-MP + MC - NPS) of poly-(lactide-co-glycolic acid) were prepared using the emulsion solvent evaporation method...
June 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28219400/alleviation-of-secondary-brain-injury-posttraumatic-inflammation-and-brain-edema-formation-by-inhibition-of-factor-xiia
#5
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/28119839/risk-factors-for-delirium-during-acute-and-subacute-stages-of-various-disorders-in-patients-admitted-to-rehabilitation-units
#6
Soyeon Jang, Kwang-Ik Jung, Woo-Kyoung Yoo, Myung Hun Jung, Suk Hoon Ohn
OBJECTIVE: To assess the risk factors for delirium in patients admitted to a rehabilitation unit for acute or subacute neurological or musculoskeletal disorders. METHODS: We reviewed the medical records of 537 patients admitted to a rehabilitation unit and selected 398 patients in the acute or subacute stage of various neurological or musculoskeletal disorders. Among them, patients who had suffered from delirium were categorized into the delirium group (n=65), and the other patients were categorized into the non-delirium group (n=333)...
December 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28113194/development-of-novel-3-d-printed-scaffolds-with-core-shell-nanoparticles-for-nerve-regeneration
#7
Se-Jun Lee, Wei Zhu, Lanier Heyburn, Margaret Nowicki, Brent Harris, Lijie Grace Zhang
A traumatic injury of peripheral nerves is serious clinical problem that may lead to major loss of nerve function, affecting quality of patient's life. Currently, nerve autograft is widely used to reconstruct the nerve gap. However, such surgical procedure suffers from many disadvantages including donor site morbidity and limited availability. In order to address these issues, neural tissue engineering has focused on the development of synthetic nerve scaffolds to support bridging a larger gap and improving nerve generation...
February 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28086980/inflammation-in-epileptogenesis-after-traumatic-brain-injury
#8
REVIEW
Kyria M Webster, Mujun Sun, Peter Crack, Terence J O'Brien, Sandy R Shultz, Bridgette D Semple
BACKGROUND: Epilepsy is a common and debilitating consequence of traumatic brain injury (TBI). Seizures contribute to progressive neurodegeneration and poor functional and psychosocial outcomes for TBI survivors, and epilepsy after TBI is often resistant to existing anti-epileptic drugs. The development of post-traumatic epilepsy (PTE) occurs in a complex neurobiological environment characterized by ongoing TBI-induced secondary injury processes. Neuroinflammation is an important secondary injury process, though how it contributes to epileptogenesis, and the development of chronic, spontaneous seizure activity, remains poorly understood...
January 13, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28065217/early-enteral-combined-with-parenteral-nutrition-treatment-for-severe-traumatic-brain-injury-effects-on-immune-function-nutritional-status-and-outcomes-%C3%A2
#9
RANDOMIZED CONTROLLED TRIAL
Fan Ming-Chao, Wang Qiao-Ling, Fang Wei, Jiang Yun-Xia, Li Lian-di, Sun Peng, Wang Zhi-Hong
Objective To compare the conjoint effect of enteral nutrition (EN) and parenteral nutrition (PN) with single EN or PN on immune function, nutritional status, complications and clinical outcomes of patients with severe traumatic brain injury (STBI). Methods A prospective randomized control trial was carried out from January 2009 to May 2012 in Neurological Intensive Care Unit (NICU). Patients of STBI who met the enrolment criteria (Glasgow Coma Scale score 6~8; Nutritional Risk Screening ≥3) were randomly divided into 3 groups and were admi- nistrated EN, PN or EN+PN treatments respectively...
November 20, 2016: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/27994152/disrupting-the-blood-brain-barrier-by-focused-ultrasound-induces-sterile-inflammation
#10
Zsofia I Kovacs, Saejeong Kim, Neekita Jikaria, Farhan Qureshi, Blerta Milo, Bobbi K Lewis, Michele Bresler, Scott R Burks, Joseph A Frank
MRI-guided pulsed focused ultrasound (pFUS) combined with systemic infusion of ultrasound contrast agent microbubbles (MB) causes localized blood-brain barrier (BBB) disruption that is currently being advocated for increasing drug or gene delivery in neurological diseases. The mechanical acoustic cavitation effects of opening the BBB by low-intensity pFUS+MB, as evidenced by contrast-enhanced MRI, resulted in an immediate damage-associated molecular pattern (DAMP) response including elevations in heat-shock protein 70, IL-1, IL-18, and TNFα indicative of a sterile inflammatory response (SIR) in the parenchyma...
January 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27822741/isolated-brain-trauma-in-cats-triggers-rapid-onset-of-hypovolemia
#11
Peter Bentzer, Per-Olof Grände
BACKGROUND: Hemodynamic instability responsive to fluid resuscitation is common after a traumatic brain injury (TBI), also in the absence of systemic hemorrhage. The present study tests if an isolated severe TBI induces a decrease in plasma volume (PV). METHODS: The study was performed in three groups of anesthetized and tracheostomized male cats (n = 21). In one group (n = 8), the cats were prepared with a cranial borehole (10 mm i.d) used to expose the brain to a fluid percussion brain injury (FPI) (1...
November 7, 2016: Neurocritical Care
https://www.readbyqxmd.com/read/27724914/neurogenic-inflammation-after-traumatic-brain-injury-and-its-potentiation-of-classical-inflammation
#12
Frances Corrigan, Kimberley A Mander, Anna V Leonard, Robert Vink
BACKGROUND: The neuroinflammatory response following traumatic brain injury (TBI) is known to be a key secondary injury factor that can drive ongoing neuronal injury. Despite this, treatments that have targeted aspects of the inflammatory pathway have not shown significant efficacy in clinical trials. MAIN BODY: We suggest that this may be because classical inflammation only represents part of the story, with activation of neurogenic inflammation potentially one of the key initiating inflammatory events following TBI...
October 11, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27621213/utility-of-circulating-serum-mirnas-as-biomarkers-of-early-cartilage-degeneration-in-animal-models-of-post-traumatic-osteoarthritis-and-inflammatory-arthritis
#13
L H W Kung, S Zaki, V Ravi, L Rowley, M M Smith, K M Bell, J F Bateman, C B Little
OBJECTIVE: The purpose of this study was to determine if serum microRNA (miRNA) signatures were biomarkers of early cartilage degeneration in preclinical mouse models of post-traumatic osteoarthritis (OA) and inflammatory arthritis. METHODS: Cartilage degeneration was induced in 10-12 week old male C57BL6 mice by destabilization of the medial meniscus (DMM) or intra-articular injection of methylated-bovine-serum-albumin (AIA), with sham-operated or saline-injected control animals (n = 6/treatment/time)...
September 9, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27533909/unfractionated-heparin-after-tbi-reduces-in-vivo-cerebrovascular-inflammation-brain-edema-and-accelerates-cognitive-recovery
#14
Katsuhiro Nagata, Kenichiro Kumasaka, Kevin D Browne, Shengjie Li, Jesse St-Pierre, John Cognetti, Joshua Marks, Victoria E Johnson, Douglas H Smith, Jose L Pascual
BACKGROUND: Severe traumatic brain injury (TBI) may increase the risk of venous thromboembolic complications; however, early prevention with heparinoids is often withheld for its anticoagulant effect. New evidence suggests low molecular weight heparin reduces cerebral edema and improves neurological recovery after stroke and TBI, through blunting of cerebral leukocyte (LEU) recruitment. It remains unknown if unfractionated heparin (UFH) similarly affects brain inflammation and neurological recovery post-TBI...
December 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27353554/association-between-comorbidities-nutritional-status-and-anticlotting-drugs-and-neurologic-outcomes-in-geriatric-patients-with-traumatic-brain-injury
#15
Tomoya Okazaki, Toru Hifumi, Kenya Kawakita, Ryuta Nakashima, Atsushi Matsumoto, Hajime Shishido, Daiske Ogawa, Masanobu Okauchi, Atsushi Shindo, Masahiko Kawanishi, Takashi Tamiya, Yasuhiro Kuroda
BACKGROUND: Several studies using trauma data banks and registers showed that age, Glasgow Coma Scale (GCS), Injury Severity Score, and intraventricular hemorrhage were independent factors for neurologic outcomes in geriatric patients with traumatic brain injury (TBI). However, these analyses did not comprehensively evaluate factors particularly associated with geriatric patients. We aimed to identify factors particularly associated with geriatric patients that affect neurologic outcomes in TBI...
September 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27043916/targeting-coagulation-factor-xii-as-a-novel-therapeutic-option-in-brain-trauma
#16
Sarah Hopp, Christiane Albert-Weissenberger, Stine Mencl, Michael Bieber, Michael K Schuhmann, Christian Stetter, Bernhard Nieswandt, Peter M Schmidt, Camelia-Maria Monoranu, Irina Alafuzoff, Niklas Marklund, Marc W Nolte, Anna-Leena Sirén, Christoph Kleinschnitz
OBJECTIVE: Traumatic brain injury is a major global public health problem for which specific therapeutic interventions are lacking. There is, therefore, a pressing need to identify innovative pathomechanism-based effective therapies for this condition. Thrombus formation in the cerebral microcirculation has been proposed to contribute to secondary brain damage by causing pericontusional ischemia, but previous studies have failed to harness this finding for therapeutic use. The aim of this study was to obtain preclinical evidence supporting the hypothesis that targeting factor XII prevents thrombus formation and has a beneficial effect on outcome after traumatic brain injury...
June 2016: Annals of Neurology
https://www.readbyqxmd.com/read/26816094/tat-hsa-%C3%AE-msh-fusion-protein-with-extended-half-life-inhibits-tumor-necrosis-factor-%C3%AE-in-brain-inflammation-of-mice
#17
Meizhu Wang, Dejuan Zhi, Haiqing Wang, Yi Ru, Hui Ren, Na Wang, Yiyao Liu, Yang Li, Hongyu Li
Neuroinflammation constitutes a principal process involved in the progression of various central nervous system (CNS) disorders, including Parkinson's disease, Alzheimer's disease, ischemic stroke, and traumatic brain injury. The safety and efficacy of potential neuroprotective therapeutic agents is controversial and limited. Alpha-melanocyte-stimulating hormone (α-MSH) as a tridecapeptide derived from pro-opiomelanocortin displays potent anti-inflammatory and protective effects with a wide therapeutic window in brain damage...
June 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/26670109/does-enoxaparin-interfere-with-hmgb1-signaling-after-tbi-a-potential-mechanism-for-reduced-cerebral-edema-and-neurologic-recovery
#18
Shengjie Li, Rachel Eisenstadt, Kenichiro Kumasaka, Victoria E Johnson, Joshua Marks, Katsuhiro Nagata, Kevin D Browne, Douglas H Smith, Jose L Pascual
BACKGROUND: Enoxaparin (ENX) has been shown to reduce cerebral edema and improve neurologic recovery after traumatic brain injury (TBI), through blunting of cerebral leukocyte (LEU) recruitment. High mobility group box 1 (HMGB1) protein may induce inflammation through LEU activation. We hypothesized that ENX after TBI reduces LEU-mediated edema through blockade of HMGB1 signaling. METHODS: Twenty-three CD1 mice underwent severe TBI by controlled cortical impact and were randomized to one of four groups receiving either monoclonal antibody against HMGB1 (MAb) or isotype (Iso) and either ENX (1 mg/kg) or normal saline (NS): NS + Iso (n = 5), NS + MAb (n = 6), ENX + Iso (n = 6), ENX + MAb (n = 6)...
March 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/26568661/early-dynamics-of-cerebrospinal-cd14-monocytes-and-cd15-granulocytes-in-patients-after-severe-traumatic-brain-injury-a-cohort-study
#19
Lukas Kurt Postl, Viktoria Bogner, Martijn van Griensven, Marc Beirer, Karl Georg Kanz, Christoph Egginger, Markus Schmitt-Sody, Peter Biberthaler, Chlodwig Kirchhoff
In traumatic brain injury (TBI) the analysis of neuroinflammatory mechanisms gained increasing interest. In this context certain immunocompetent cells might play an important role. Interestingly, in the actual literature there exist only a few studies focusing on the role of monocytes and granulocytes in TBI patients. In this regard it has recently reported that the choroid plexus represents an early, selective barrier for leukocytes after brain injury. Therefore the aim of this study was to evaluate the very early dynamics of CD14+ monocytes and CD15+ granulocyte in CSF of patients following severe TBI with regard to the integrity of the BBB...
2015: Mediators of Inflammation
https://www.readbyqxmd.com/read/26414212/time-course-and-size-of-blood-brain-barrier-opening-in-a-mouse-model-of-blast-induced-traumatic-brain-injury
#20
Christopher D Hue, Frances S Cho, Siqi Cao, Russell E Nicholls, Edward W Vogel Iii, Cosmas Sibindi, Ottavio Arancio, Cameron R Dale Bass, David F Meaney, Barclay Morrison Iii
An increasing number of studies have reported blood-brain barrier (BBB) dysfunction after blast-induced traumatic brain injury (bTBI). Despite this evidence, there is limited quantitative understanding of the extent of BBB opening and the time course of damage after blast injury. In addition, many studies do not report kinematic parameters of head motion, making it difficult to separate contributions of primary and tertiary blast-loading. Detailed characterization of blast-induced BBB damage may hold important implications for serum constituents that may potentially cross the compromised barrier and contribute to neurotoxicity, neuroinflammation, and persistent neurologic deficits...
July 1, 2016: Journal of Neurotrauma
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