Journals Journal of Cerebral Blood Flow...

Journal of Cerebral Blood Flow and Metabolism
Saiyue Deng, Yusi Hu, Simiao Chen, Yang Xue, Di Yao, Qian Sun, Maiken Nedergaard, Wei Wang, Fengfei Ding
Accumulating evidence shows that most chronic neurological diseases have a link with sleep disturbances, and that patients with chronically poor sleep undergo an accelerated cognitive decline. Indeed, a single-night of sleep deprivation may increase metabolic waste levels in cerebrospinal fluid. However, it remains unknown how chronic sleep disturbances in isolation from an underlying neurological disease may affect the glymphatic system. Clearance of brain interstitial waste by the glymphatic system occurs primarily during sleep, driven by multiple oscillators including arterial pulsatility, and vasomotion...
April 19, 2024: Journal of Cerebral Blood Flow and Metabolism
Jonah Gordon, Cesar V Borlongan
With a foundation built upon initial work from the 1980s demonstrating graft viability in cerebral ischemia, stem cell transplantation has shown immense promise in promoting survival, enhancing neuroprotection and inducing neuroregeneration, while mitigating both histological and behavioral deficits that frequently accompany ischemic stroke. These findings have led to a number of clinical trials that have thoroughly supported a strong safety profile for stem cell therapy in patients but have generated variable efficacy...
April 19, 2024: Journal of Cerebral Blood Flow and Metabolism
Joseph V Moxon, Cornea Pretorius, Alexandra F Trollope, Parul Mittal, Manuela Klingler-Hoffmann, Peter Hoffmann, Jonathan Golledge
Ischaemic stroke results in the formation of a cerebral infarction bordered by an ischaemic penumbra. Characterising the proteins within the ischaemic penumbra may identify neuro-protective targets and novel circulating markers to improve patient care. This review assessed data from studies using proteomic platforms to compare ischaemic penumbra tissues to controls following experimental stroke in animal models. Proteins reported to differ significantly between penumbra and control tissues were analysed in silico to identify protein-protein interactions and over-represented pathways...
April 19, 2024: Journal of Cerebral Blood Flow and Metabolism
Joel S Burma, Marc-Antoine Roy, Courtney M Kennedy, Lawrence Labrecque, Patrice Brassard, Jonathan D Smirl
Numerous driven techniques have been utilized to assess dynamic cerebral autoregulation (dCA) in healthy and clinical populations. The current review aimed to amalgamate this literature and provide recommendations to create greater standardization for future research. The PubMed database was searched with inclusion criteria consisting of original research articles using driven dCA assessments in humans. Risk of bias were completed using Scottish Intercollegiate Guidelines Network and Methodological Index for Non-Randomized Studies...
April 18, 2024: Journal of Cerebral Blood Flow and Metabolism
Yue Cheng, Yueman Zhang, Peiying Li
Cell therapy and regenerative medicine have made remarkable progress in treating neurodegenerative disorders. Induced pluripotent stem cells (iPSCs) offer a promising source for cell replacement therapies, but their practical application faces challenges due to poor survival and integration after transplantation. Park et al. propose a novel therapeutic strategy involving the co-transplantation of regulatory T cells (Tregs) and iPSC-derived dopamine neurons. This combined approach enhances the survival of transplanted cells and protects against neuroinflammation-induced damage...
April 17, 2024: Journal of Cerebral Blood Flow and Metabolism
Lawrence Labrecque, Marc-Antoine Roy, Shahrzad Soleimani Dehnavi, Mahmoudreza Taghizadeh, Jonathan D Smirl, Patrice Brassard
A directional sensitivity of the cerebral pressure-flow relationship has been described using repeated squat-stands. Oscillatory lower body negative pressure (OLBNP) is a reproducible method to characterize dynamic cerebral autoregulation (dCA). It could represent a safer method to examine the directional sensitivity of the cerebral pressure-flow relationship within clinical populations and/or during pharmaceutical administration. Therefore, examining the cerebral pressure-flow directional sensitivity during an OLBNP-induced cyclic physiological stress is crucial...
April 13, 2024: Journal of Cerebral Blood Flow and Metabolism
Michael M Tymko, Audrey Drapeau, Maria Augusta Vieira-Coelho, Lawrence Labrecque, Sarah Imhoff, Geoff B Coombs, Stephan Langevin, Marc Fortin, Nathalie Châteauvert, Philip N Ainslie, Patrice Brassard
The impact of physiological stressors on cerebral sympathetic nervous activity (SNA) remains controversial. We hypothesized that cerebral noradrenaline (NA) spillover, an index of cerebral SNA, would not change during both submaximal isometric handgrip (HG) exercise followed by a post-exercise circulatory occlusion (PECO), and supine dynamic cycling exercise. Twelve healthy participants (5 females) underwent simultaneous blood sampling from the right radial artery and right internal jugular vein. Right internal jugular vein blood flow was measured using Duplex ultrasound, and tritiated NA was infused through the participants' right superficial forearm vein...
April 13, 2024: Journal of Cerebral Blood Flow and Metabolism
Jordan D Bird, David B MacLeod, Donald E Griesdale, Mypinder S Sekhon, Ryan L Hoiland
The near-infrared spectroscopy (NIRS)-derived cerebral oximetry index (COx) has become popularized for non-invasive neuromonitoring of cerebrovascular function in post-cardiac arrest patients with hypoxic-ischemic brain injury (HIBI). We provide commentary on the physiologic underpinnings and assumptions of NIRS and the COx, potential confounds in the context of HIBI, and the implications for the assessment of cerebral autoregulation.
April 11, 2024: Journal of Cerebral Blood Flow and Metabolism
Dehao Yang, Jingyu Hu, Minyue Zhang, Yiqun Chen, Haobo Xie, Yining Jin, Zerui Jiang, Jiaqi Huang, Kun Li, Jiexi Huang, Yanchu Wang, Yiyun Weng, Guangyong Chen
As few studies have reported the impact of lower left ventricular ejection fraction (LVEF) on the prognosis of acute ischemic stroke (AIS) patients, we aimed to explore this through a retrospective cohort study and a meta-analysis. A total of 283 AIS patients receiving intravenous thrombolysis at the Third Affiliated Hospital of Wenzhou Medical University between 2016 and 2019 were enrolled and divided into three groups based on LVEF tertiles. The logistic regression model estimated the association between LVEF and the three-month AIS prognosis...
April 11, 2024: Journal of Cerebral Blood Flow and Metabolism
Guillaume Plourde, Hélène Roumes, Laurent Suissa, Lorenz Hirt, Émilie Doche, Luc Pellerin, Anne-Karine Bouzier-Sore, Hervé Quintard
The goal of neurocritical care is to prevent and reverse the pathologic cascades of secondary brain injury by optimizing cerebral blood flow, oxygen supply and substrate delivery. While glucose is an essential energetic substrate for the brain, we frequently observe a strong decrease in glucose delivery and/or a glucose metabolic dysregulation following acute brain injury. In parallel, during the last decades, lactate and ketone bodies have been identified as potential alternative fuels to provide energy to the brain, both under physiological conditions and in case of glucose shortage...
April 11, 2024: Journal of Cerebral Blood Flow and Metabolism
Harm Jan van der Horn, Andrei A Vakhtin, Kayla Julio, Stephanie Nitschke, Nicholas Shaff, Andrew B Dodd, Erik Erhardt, John P Phillips, Sarah Pirio Richardson, Amanda Deligtisch, Melanie Stewart, Gerson Suarez Cedeno, Sanne K Meles, Andrew R Mayer, Sephira G Ryman
A mounting body of research points to cerebrovascular dysfunction as a fundamental element in the pathophysiology of Parkinson's disease (PD). In the current feasibility study, blood-oxygen-level-dependent (BOLD) MRI was used to measure cerebrovascular reactivity (CVR) in response to hypercapnia in 26 PD patients and 16 healthy controls (HC), and aimed to find a multivariate pattern specific to PD. Whole-brain maps of CVR amplitude (i.e., magnitude of response to CO2 ) and latency (i.e., time to reach maximum amplitude) were computed, which were further analyzed using scaled sub-profile model principal component analysis (SSM-PCA) with leave-one-out cross-validation...
April 5, 2024: Journal of Cerebral Blood Flow and Metabolism
Shoko Hara, Junko Kikuta, Kaito Takabayashi, Koji Kamagata, Shihori Hayashi, Motoki Inaji, Yoji Tanaka, Masaaki Hori, Kenji Ishii, Tadashi Nariai, Toshiaki Taoka, Shinji Naganawa, Shigeki Aoki, Taketoshi Maehara
Moyamoya disease (MMD) causes cerebral arterial stenosis and hemodynamic disturbance, the latter of which may disrupt glymphatic system activity, the waste clearance system. We evaluated 46 adult patients with MMD and 33 age- and sex-matched controls using diffusivity along the perivascular space (ALPS) measured with diffusion tensor imaging (ALPS index), which may partly reflect glymphatic system activity, and multishell diffusion MRI to generate freewater maps. Twenty-three patients were also evaluated via 15 O-gas positron emission tomography (PET), and all patients underwent cognitive tests...
April 4, 2024: Journal of Cerebral Blood Flow and Metabolism
Hee Sun Shin, Geun Hwa Park, Eun Sil Choi, So Young Park, Da Sol Kim, Jaerak Chang, Ji Man Hong
Moyamoya disease (MMD) is closely associated with the Ring Finger Protein 213 ( RNF213 ), a susceptibility gene for MMD. However, its biological function remains unclear. We aimed to elucidate the role of RNF213 in the damage incurred by human endothelial cells under oxygen-glucose deprivation (OGD). We analyzed autophagy in peripheral blood mononuclear cells (PBMCs) derived from patients carrying either RNF213 wildtype (WT) or variant (p.R4810K). Subsequently, human umbilical vein endothelial cells (HUVECs) were transfected with RNF213 WT (HUVECWT ) or p...
April 4, 2024: Journal of Cerebral Blood Flow and Metabolism
Annabel J Sorby-Adams, Oana C Marian, Isabella M Bilecki, Levi E Elms, Nawaf Yassi, Rebecca J Hood, Janet K Coller, Shannon M Stuckey, W Taylor Kimberly, Tracy D Farr, Anna V Leonard, Emma Thornton, Robert Vink, Renée J Turner
Following ischemic stroke, substance P (SP)-mediated neurogenic inflammation is associated with profound blood-brain barrier (BBB) dysfunction, cerebral edema, and elevated intracranial pressure (ICP). SP elicits its effects by binding the neurokinin 1 tachykinin receptor (NK1-R), with administration of an NK1-R antagonist shown to ameliorate BBB dysfunction and cerebral edema in rodent and permanent ovine stroke models. Given the importance of reperfusion in clinical stroke, this study examined the efficacy of NK1-R antagonist treatment in reducing cerebral edema and ICP in an ovine model of transient middle cerebral artery occlusion (tMCAo)...
March 28, 2024: Journal of Cerebral Blood Flow and Metabolism
Gesa Carstens, Marcel M Verbeek, Ursula K Rohlwink, Anthony A Figaji, Lindsey Te Brake, Arjan van Laarhoven
Metabolomic analysis of cerebrospinal fluid (CSF) is used to improve diagnostics and pathophysiological understanding of neurological diseases. Alterations in CSF metabolite levels can partly be attributed to changes in brain metabolism, but relevant transport processes influencing CSF metabolite concentrations should be considered. The entry of molecules including metabolites into the central nervous system (CNS), is tightly controlled by the blood-brain, blood-CSF, and blood-spinal cord barriers, where aquaporins and membrane-bound carrier proteins regulate influx and efflux via passive and active transport processes...
March 28, 2024: Journal of Cerebral Blood Flow and Metabolism
Yufan Cao, Weihai Xu, Qing Liu
The blood-brain barrier (BBB) is a complex and dynamic interface that regulates the exchange of molecules and cells between the blood and the central nervous system. It undergoes structural and functional changes during aging, which may compromise its integrity and contribute to the pathogenesis of neurodegenerative diseases. In recent years, advances in microscopy and high-throughput bioinformatics have allowed a more in-depth investigation of the aging mechanisms of BBB. This review summarizes age-related alterations of the BBB structure and function from six perspectives: endothelial cells, astrocytes, pericytes, basement membrane, microglia and perivascular macrophages, and fibroblasts, ranging from the molecular level to the human multi-system level...
March 21, 2024: Journal of Cerebral Blood Flow and Metabolism
Miao Sun, Xin Huang, Xuelei Ruan, Xiuli Shang, Mengyang Zhang, Libo Liu, Ping Wang, Ping An, Yang Lin, Jin Yang, Yixue Xue
Chronic cerebral ischemia (CCI) is a clinical syndrome characterised by brain dysfunction due to decreased chronic cerebral perfusion. CCI initiates several inflammatory pathways, including pyroptosis. RNA-binding proteins (RBPs) play important roles in CCI. This study aimed to explore whether the interaction between RBP-Cpeb4 and Dclk2 affected Ehf phosphorylation to regulate neuronal pyroptosis. HT22 cells and mice were used to construct oxygen glucose deprivation (OGD)/CCI models. We found that Cpeb4 and Dclk2 were upregulated in OGD-treated HT22 cells and CCI-induced hippocampal CA1 tissues...
March 21, 2024: Journal of Cerebral Blood Flow and Metabolism
Lena Schmitzer, Stephan Kaczmarz, Jens Göttler, Gabriel Hoffmann, Michael Kallmayer, Hans-Henning Eckstein, Dennis Martin Hedderich, Jan Kufer, Claus Zimmer, Christine Preibisch, Fahmeed Hyder, Nico Sollmann
Atherosclerosis can underly internal carotid artery stenosis (ICAS), a major risk factor for ischemic stroke, as well as small vessel disease (SVD). This study aimed to investigate hemodynamics and structural alterations associated with SVD in ICAS patients. 28 patients with unilateral asymptomatic ICAS and 30 age-matched controls underwent structural (T1-/T2-weighted and diffusion tensor imaging [DTI]) and hemodynamic (pseudo-continuous arterial spin labeling and dynamic susceptibility contrast) magnetic resonance imaging...
March 20, 2024: Journal of Cerebral Blood Flow and Metabolism
Sandeepa Sur, Zixuan Lin, Yang Li, Sevil Yasar, Paul B Rosenberg, Abhay Moghekar, Xirui Hou, Dengrong Jiang, Rita R Kalyani, Kaisha Hazel, George Pottanat, Cuimei Xu, Jay J Pillai, Peiying Liu, Marilyn Albert, Hanzhang Lu
Vascular pathology is the second leading cause of cognitive impairment and represents a major contributing factor in mixed dementia. However, biomarkers for vascular cognitive impairment and dementia (VCID) are under-developed. Here we aimed to investigate the potential role of CO2 Cerebrovascular Reactivity (CVR) measured with phase-contrast quantitative flow MRI in cognitive impairment and dementia. Forty-five (69 ± 7 years) impaired (37 mild-cognitive-impairment and 8 mild-dementia by syndromic diagnosis) and 22 cognitively-healthy-control (HC) participants were recruited and scanned on a 3 T MRI...
March 15, 2024: Journal of Cerebral Blood Flow and Metabolism
Sungtak Hong, Jyoti Singh Tomar, Jun Shen
A metabolic coupling between glutamate and N-acetylaspartate measured by in vivo magnetic resonance spectroscopy has been recently reported in the literature with inconsistent findings. In this study, confounders originating from Pearson's spurious correlation of ratios and spectral correlation due to overlapping magnetic resonance spectroscopy signals of glutamate and N-acetylaspartate were practically eliminated to facilitate the determination of any metabolic link between glutamate and N-acetylaspartate in the human brain using in vivo magnetic resonance spectroscopy...
March 14, 2024: Journal of Cerebral Blood Flow and Metabolism
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