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Fluids and Barriers of the CNS

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https://www.readbyqxmd.com/read/29332604/the-effect-of-an-adenosine-a2a-agonist-on-intra-tumoral-concentrations-of-temozolomide-in-patients-with-recurrent-glioblastoma
#1
Sadhana Jackson, Jon Weingart, Edjah K Nduom, Thura T Harfi, Richard T George, Dorothea McAreavey, Xiaobu Ye, Nicole M Anders, Cody Peer, William D Figg, Mark Gilbert, Michelle A Rudek, Stuart A Grossman
BACKGROUND: The blood-brain barrier (BBB) severely limits the entry of systemically administered drugs including chemotherapy to the brain. In rodents, regadenoson activation of adenosine A2A receptors causes transient BBB disruption and increased drug concentrations in normal brain. This study was conducted to evaluate if activation of A2A receptors would increase intra-tumoral temozolomide concentrations in patients with glioblastoma. METHODS: Patients scheduled for a clinically indicated surgery for recurrent glioblastoma were eligible...
January 15, 2018: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29329565/correction-to-current-research-into-brain-barriers-and-the-delivery-of-therapeutics-for-neurological-diseases-a-report-on-cns-barrier-congress-london-uk-2017
#2
John Greenwood, Margareta Hammarlund-Udenaes, Hazel C Jones, Alan W Stitt, Roosmarijn E Vandenbroucke, Ignacio A Romero, Matthew Campbell, Gert Fricker, Birger Brodin, Heiko Manninga, Pieter J Gaillard, Markus Schwaninger, Carl Webster, Krzysztof B Wicher, Michel Khrestchatisky
After publication of the article [1], it has been brought to our attention that there are some errors in the formatting of names in the final version of the article.
January 12, 2018: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29307307/role-of-cationic-drug-sensitive-transport-systems-at-the-blood-cerebrospinal-fluid-barrier-in-para-tyramine-elimination-from-rat-brain
#3
Shin-Ichi Akanuma, Yuhei Yamazaki, Yoshiyuki Kubo, Ken-Ichi Hosoya
BACKGROUND: para-Tyramine (p-TA) is a biogenic amine which is involved in multiple neuronal signal transductions. Since the concentration of p-TA in dog cerebrospinal fluid (CSF) has been reported to be greater than that in plasma, it is proposed that clearance of cerebral p-TA is important for normal function. The purpose of this study was to examine the role of the blood-brain barrier and blood-cerebrospinal fluid barrier (BCSFB) in p-TA clearance from the brain. METHODS: In vivo [3H]p-TA elimination from rat cerebral cortex and from CSF was examined after intracerebral and intracerebroventricular administration, respectively...
January 8, 2018: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29258534/a-3d-subject-specific-model-of-the-spinal-subarachnoid-space-with-anatomically-realistic-ventral-and-dorsal-spinal-cord-nerve-rootlets
#4
Lucas R Sass, Mohammadreza Khani, Gabryel Connely Natividad, R Shane Tubbs, Olivier Baledent, Bryn A Martin
BACKGROUND: The spinal subarachnoid space (SSS) has a complex 3D fluid-filled geometry with multiple levels of anatomic complexity, the most salient features being the spinal cord and dorsal and ventral nerve rootlets. An accurate anthropomorphic representation of these features is needed for development of in vitro and numerical models of cerebrospinal fluid (CSF) dynamics that can be used to inform and optimize CSF-based therapeutics. METHODS: A subject-specific 3D model of the SSS was constructed based on high-resolution anatomic MRI...
December 19, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29228970/chemokine-and-cytokine-levels-in-the-lumbar-cerebrospinal-fluid-of-preterm-infants-with-post-hemorrhagic-hydrocephalus
#5
Gakwaya Habiyaremye, Diego M Morales, Clinton D Morgan, James P McAllister, Travis S CreveCoeur, Rowland H Han, Mohamed Gabir, Brandon Baksh, Deanna Mercer, David D Limbrick
BACKGROUND: Neuroinflammation has been implicated in the pathophysiology of post-hemorrhagic hydrocephalus (PHH) of prematurity, but no comprehensive analysis of signaling molecules has been performed using human cerebrospinal fluid (CSF). METHODS: Lumbar CSF levels of key cytokines (IL-1α, IL-1β, IL-4, IL-6, IL-8, IL-10, IL-12, TNF-α, TGF-β1, IFN-γ) and chemokines (XCL-1, CCL-2, CCL-3, CCL-19, CXCL-10, CXCL-11, CXCL-12) were measured using conventional and multiplexed Enzyme-linked Immunosorbent Assays and compared between preterm infants with PHH and those with no known neurological injury...
December 12, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29212505/do-patients-with-schizophreniform-and-bipolar-disorders-show-an-intrathecal-polyspecific-antiviral-immune-response-a-pilot-study
#6
Dominique Endres, Daniela Huzly, Rick Dersch, Oliver Stich, Benjamin Berger, Florian Schuchardt, Evgeniy Perlov, Nils Venhoff, Sabine Hellwig, Bernd L Fiebich, Daniel Erny, Tilman Hottenrott, Ludger Tebartz van Elst
BACKGROUND: We previously described inflammatory cerebrospinal fluid (CSF) alterations in a subgroup of patients with schizophreniform disorders and the synthesis of polyspecific intrathecal antibodies against different neurotropic infectious pathogens in some patients with bipolar disorders. Consequently, we have measured the prevalence of a positive MRZ reaction (MRZR)-a marker for a polyspecific, antiviral, intrathecal, humoral immune response composed of three antibody indices for the neurotropic viruses of measles (M), rubella (R), and varicella zoster (Z)-in these patients...
December 7, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29183383/the-opioid-epidemic-a-central-role-for-the-blood-brain-barrier-in-opioid-analgesia-and-abuse
#7
REVIEW
Charles P Schaefer, Margaret E Tome, Thomas P Davis
Opioids are currently the primary treatment method used to manage both acute and chronic pain. In the past two to three decades, there has been a surge in the use, abuse and misuse of opioids. The mechanism by which opioids relieve pain and induce euphoria is dependent on the drug crossing the blood-brain barrier and accessing the central nervous system. This suggests the blood brain barrier plays a central role in both the benefits and risks of opioid use. The complex physiological responses to opioids that provide the benefits and drive the abuse also needs to be considered in the resolution of the opioid epidemic...
November 29, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29157263/ldl-receptor-blockade-reduces-mortality-in-a-mouse-model-of-ischaemic-stroke-without-improving-tissue-type-plasminogen-activator-induced-brain-haemorrhage-towards-pre-clinical-simulation-of-symptomatic-ich
#8
Be'eri Niego, Brad R S Broughton, Heidi Ho, Christopher G Sobey, Robert L Medcalf
BACKGROUND: Symptomatic intracerebral haemorrhage (sICH) following tissue-type plasminogen activator (rt-PA) administration is the most feared and lethal complication of thrombolytic therapy for ischaemic stroke, creating a significant obstacle for a broader uptake of this beneficial treatment. rt-PA also undermines cerebral vasculature stability in a multimodal process which involves engagement with LDL receptor-related protein 1 (LRP-1), potentially underlying the development of sICH...
November 21, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29110676/current-research-into-brain-barriers-and-the-delivery-of-therapeutics-for-neurological-diseases-a-report-on-cns-barrier-congress-london-uk-2017
#9
REVIEW
John Greenwood, Margareta Hammarlund-Udenaes, Hazel C Jones, Alan W Stitt, Roosmarijn E Vandenbrouke, Ignacio A Romero, Matthew Campbell, Gert Fricker, Birger Brodin, Heiko Manninga, Pieter J Gaillard, Markus Schwaninger, Carl Webster, Krzysztof B Wicher, Michel Khrestchatisky
This is a report on the CNS barrier congress held in London, UK, March 22-23rd 2017 and sponsored by Kisaco Research Ltd. The two 1-day sessions were chaired by John Greenwood and Margareta Hammarlund-Udenaes, respectively, and each session ended with a discussion led by the chair. Speakers consisted of invited academic researchers studying the brain barriers in relation to neurological diseases and industry researchers studying new methods to deliver therapeutics to treat neurological diseases. We include here brief reports from the speakers...
November 7, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29089037/revisiting-atenolol-as-a-low-passive-permeability-marker
#10
Xiaomei Chen, Tim Slättengren, Elizabeth C M de Lange, David E Smith, Margareta Hammarlund-Udenaes
BACKGROUND: Atenolol, a hydrophilic beta blocker, has been used as a model drug for studying passive permeability of biological membranes such as the blood-brain barrier (BBB) and the intestinal epithelium. However, the extent of S-atenolol (the active enantiomer) distribution in brain has never been evaluated, at equilibrium, to confirm that no transporters are involved in its transport at the BBB. METHODS: To assess whether S-atenolol, in fact, depicts the characteristics of a low passive permeable drug at the BBB, a microdialysis study was performed in rats to monitor the unbound concentrations of S-atenolol in brain extracellular fluid (ECF) and plasma during and after intravenous infusion...
October 31, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29047355/hyperdynamic-csf-motion-profiles-found-in-idiopathic-normal-pressure-hydrocephalus-and-alzheimer-s-disease-assessed-by-fluid-mechanics-derived-from-magnetic-resonance-images
#11
Ken Takizawa, Mitsunori Matsumae, Naokazu Hayashi, Akihiro Hirayama, Satoshi Yatsushiro, Kagayaki Kuroda
BACKGROUND: Magnetic resonance imaging (MRI) does not only ascertain morphological features, but also measures physiological properties such as fluid velocity or pressure gradient. The purpose of this study was to investigate cerebrospinal fluid (CSF) dynamics in patients with morphological abnormalities such as enlarged brain ventricles and subarachnoid spaces. We used a time-resolved three dimensional phase contrast (3D-PC) MRI technique to quantitatively evaluate CSF dynamics in the Sylvian aqueduct of healthy elderly individuals and patients with either idiopathic normal pressure hydrocephalus (iNPH) or Alzheimer's disease (AD) presenting with ventricular enlargement...
October 18, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29029630/correction-to-correlation-of-csf-flow-using-phase-contrast-mri-with-ventriculomegaly-and-csf-opening-pressure-in-mucopolysaccharidoses
#12
Amauri Dalla Corte, Carolina F M de Souza, Maurício Anés, Fabio K Maeda, Armelle Lokossou, Leonardo M Vedolin, Maria Gabriela Longo, Monica M Ferreira, Solanger G P Perrone, Olivier Balédent, Roberto Giugliani
After publication of the article [1], it has been brought to our attention that the full funding acknowledgement is missing from the original article.
October 13, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28974245/dose-escalation-study-of-intravenous-and-intra-arterial-n-acetylcysteine-for-the-prevention-of-oto-and-nephrotoxicity-of-cisplatin-with-a-contrast-induced-nephropathy-model-in-patients-with-renal-insufficiency
#13
Edit Dósa, Krisztina Heltai, Tamás Radovits, Gabriella Molnár, Judit Kapocsi, Béla Merkely, Rongwei Fu, Nancy D Doolittle, Gerda B Tóth, Zachary Urdang, Edward A Neuwelt
BACKGROUND: Cisplatin neuro-, oto-, and nephrotoxicity are major problems in children with malignant tumors, including medulloblastoma, negatively impacting educational achievement, socioemotional development, and overall quality of life. The blood-labyrinth barrier is somewhat permeable to cisplatin, and sensory hair cells and cochlear supporting cells are highly sensitive to this toxic drug. Several chemoprotective agents such as N-acetylcysteine (NAC) were utilized experimentally to avoid these potentially serious and life-long side effects, although no clinical phase I trial was performed before...
October 3, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28950883/characterization-of-cardiac-and-respiratory-driven-cerebrospinal-fluid-motion-based-on-asynchronous-phase-contrast-magnetic-resonance-imaging-in-volunteers
#14
Ken Takizawa, Mitsunori Matsumae, Saeko Sunohara, Satoshi Yatsushiro, Kagayaki Kuroda
BACKGROUND: A classification of cardiac- and respiratory-driven components of cerebrospinal fluid (CSF) motion has been demonstrated using echo planar imaging and time-spatial labeling inversion pulse techniques of magnetic resonance imaging (MRI). However, quantitative characterization of the two motion components has not been performed to date. Thus, in this study, the velocities and displacements of the waveforms of the two motions were quantitatively evaluated based on an asynchronous two-dimensional (2D) phase-contrast (PC) method followed by frequency component analysis...
September 27, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28918752/correlation-of-csf-flow-using-phase-contrast-mri-with-ventriculomegaly-and-csf-opening-pressure-in-mucopolysaccharidoses
#15
Amauri Dalla Corte, Carolina F M de Souza, Maurício Anés, Fabio K Maeda, Armelle Lokossou, Leonardo M Vedolin, Maria Gabriela Longo, Monica M Ferreira, Solanger G P Perrone, Olivier Balédent, Roberto Giugliani
BACKGROUND: Very little is known about the incidence and prevalence of hydrocephalus in patients with mucopolysaccharidoses (MPS). The biggest challenge is to distinguish communicating hydrocephalus from ventricular dilatation secondary to brain atrophy, because both conditions share common clinical and neuroradiological features. The main purpose of this study is to assess the relationship between ventriculomegaly, brain and cerebrospinal fluid (CSF) volumes, aqueductal and cervical CSF flows, and CSF opening pressure in MPS patients, and to provide potential biomarkers for abnormal CSF circulation...
September 18, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28899431/the-role-of-perfusion-and-diffusion-mri-in-the-assessment-of-patients-affected-by-probable-idiopathic-normal-pressure-hydrocephalus-a-cohort-prospective-preliminary-study
#16
Francesco Tuniz, Maria Caterina Vescovi, Daniele Bagatto, Daniela Drigo, Maria Cristina De Colle, Marta Maieron, Miran Skrap
BACKGROUND: Invasive tests measuring resistance to cerebral spinal fluid (CSF) outflow and the effect of temporary drainage of CSF are used to select candidates affected by idiopathic normal pressure hydrocephalus (iNPH) for shunt surgery. Neither test, however, completely excludes patients from treatment. Perfusion and diffusion magnetic resonance imaging (MRI) are non-invasive techniques that might be of value in selecting patients for surgical treatment and understanding brain changes in iNPH patients...
September 12, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28806983/profiling-of-metalloprotease-activities-in-cerebrospinal-fluids-of-patients-with-neoplastic-meningitis
#17
Catharina Conrad, Kristina Dorzweiler, Miles A Miller, Douglas A Lauffenburger, Herwig Strik, Jörg W Bartsch
BACKGROUND: Neoplastic invasion into leptomeninges and subarachnoid space, resulting in neoplastic meningitis (NM) is a fatal complication of advanced solid and hematological neoplasms. Identification of malignant involvement of the cerebrospinal fluid (CSF) early in the disease course has crucial prognostic and therapeutic implications, but remains challenging. As indicators of extracellular matrix (ECM) degradation and breakdown of the blood-brain-barrier, Matrix Metalloproteases (MMPs) and A Disintegrin and Metalloproteases (ADAMs) are potential analytes for cerebral pathophysiology and metastatic dissemination of tumor cells into the CSF...
August 14, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28774343/effect-of-shear-stress-on-ipsc-derived-human-brain-microvascular-endothelial-cells-dhbmecs
#18
Jackson G DeStefano, Zinnia S Xu, Ashley J Williams, Nahom Yimam, Peter C Searson
BACKGROUND: The endothelial cells that form the lumen of capillaries and microvessels are an important component of the blood-brain barrier. Cell phenotype is regulated by transducing a range of biomechanical and biochemical signals in the local microenvironment. Here we report on the role of shear stress in modulating the morphology, motility, proliferation, apoptosis, and protein and gene expression, of confluent monolayers of human brain microvascular endothelial cells derived from induced pluripotent stem cells...
August 4, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28701191/blood-brain-barrier-and-foetal-onset-hydrocephalus-with-a-view-on-potential-novel-treatments-beyond-managing-csf-flow
#19
REVIEW
M Guerra, J L Blázquez, E M Rodríguez
Despite decades of research, no compelling non-surgical therapies have been developed for foetal hydrocephalus. So far, most efforts have pointed to repairing disturbances in the cerebrospinal fluid (CSF) flow and to avoid further brain damage. There are no reports trying to prevent or diminish abnormalities in brain development which are inseparably associated with hydrocephalus. A key problem in the treatment of hydrocephalus is the blood-brain barrier that restricts the access to the brain for therapeutic compounds or systemically grafted cells...
July 13, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28679427/comparison-of-the-sagittal-sinus-cross-sectional-area-between-patients-with-multiple-sclerosis-hydrocephalus-intracranial-hypertension-and-spontaneous-intracranial-hypotension-a-surrogate-marker-of-venous-transmural-pressure
#20
Grant A Bateman, Jeannette Lechner-Scott, Ross Copping, Christopher Moeskops, Swee Leong Yap
There is evidence that patients with multiple sclerosis (MS) and hydrocephalus share some common pathophysiological mechanisms. Alterations in CSF pressure are known to affect cerebral venous sinus geometry. To further explore these mechanisms, we measured the superior sagittal sinus (SSS) cross-sectional area 3 cm above the torcular using T2 images in 20 MS, 10 spontaneous intracranial hypotension (SIH), 21 hydrocephalus and 20 idiopathic intracranial hypertension (IIH) patients and compared with 20 matched controls...
July 6, 2017: Fluids and Barriers of the CNS
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