Marion T. Turnbull

ORCID: 0000-0003-4448-5591
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About
Contact & Profiles
Research Areas
  • Intracranial Aneurysms: Treatment and Complications
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Alzheimer's disease research and treatments
  • Nicotinic Acetylcholine Receptors Study
  • Intracerebral and Subarachnoid Hemorrhage Research
  • Vascular Malformations Diagnosis and Treatment
  • Mesenchymal stem cell research
  • Nerve injury and regeneration
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Single-cell and spatial transcriptomics
  • Immune cells in cancer
  • Glioma Diagnosis and Treatment
  • Biomedical and Engineering Education
  • Neurosurgical Procedures and Complications
  • Diversity and Career in Medicine
  • Neuroscience and Neuropharmacology Research
  • Peripheral Neuropathies and Disorders
  • Pharmacogenetics and Drug Metabolism
  • Amyotrophic Lateral Sclerosis Research
  • Healthcare professionals’ stress and burnout
  • Inflammatory Biomarkers in Disease Prognosis
  • Cerebrospinal fluid and hydrocephalus
  • Neurogenesis and neuroplasticity mechanisms
  • Cardiovascular Effects of Exercise
  • Memory and Neural Mechanisms

Jacksonville College
2020-2024

Mayo Clinic in Florida
2019-2024

WinnMed
2020-2024

James Cook University Hospital
2020

Park Centre for Mental Health
2018-2019

The University of Queensland
2016-2019

Louisiana State University Health Sciences Center Shreveport
2019

Center for Neurosciences
2019

University College Hospital at Westmoreland Street
2005

University College London
2005

Introduction: Anti-N-methyl-D-aspartate (NMDA) receptor encephalitis is an increasingly recognized form of immune-mediated encephalitis. Here we present a case that represents the shortest hospitalization-to-bortezomib treatment timeline (42 days), and believe this reflected in patient's outcome with complete independence within short timeframe. Case Report: We describe anti-NMDA 18-year-old African American female presenting progressive, medically refractory disease. Despite two rounds...

10.3389/fneur.2020.00188 article EN cc-by Frontiers in Neurology 2020-03-27

Objective: To report the preliminary safety, tolerability, and cerebral spinal fluid (CSF) sampling utility of serial injections concentrated intraventricular nicardipine (IVN) in treatment aneurysmal subarachnoid hemorrhage (aSAH). Methods: We clinical, radiographic, laboratory safety tolerability data a retrospective case series from single academic medical center. All patients with aSAH developed vasospasm despite enteral nimodipine received IVN (2.5 mg/mL). CSF injection are defined...

10.3390/jpm13030428 article EN Journal of Personalized Medicine 2023-02-27

Abstract Cholinergic basal forebrain (cBF)-derived neurotransmission plays a crucial role in regulating neuronal function throughout the cortex, yet mechanisms controlling cholinergic innervation to downstream targets have not been elucidated. Here we report that removing p75 neurotrophin receptor (p75 NTR ) from cBF neurons induces significant impairment fear extinction consolidation. We demonstrate this is achieved through alterations synaptic connectivity and functional activity within...

10.1038/s41398-018-0248-x article EN cc-by Translational Psychiatry 2018-09-21

Degeneration of basal forebrain cholinergic neurons (BFCNs) precedes hippocampal degeneration and pathological amyloid-beta (Aβ) accumulation, underpins the development cognitive dysfunction in sporadic Alzheimer's disease (AD). We hypothesized that BFCNs causes a decrease neurotrophin levels innervated brain areas, which turn promotes Aβ pathology impairment. Here we show lesion septo-hippocampal pre-symptomatic transgenic amyloid AD mouse model (APP/PS1 mice) increases soluble hippocampus,...

10.3389/fnmol.2018.00051 article EN cc-by Frontiers in Molecular Neuroscience 2018-02-21

Introduction: Severe, often sudden-onset headache is the principal presenting symptoms of aneurysmal subarachnoid hemorrhage (aSAH). We hypothesized that gabapentin would be safe and tolerable for aSAH-induced headaches reduce concurrent opioid use. Methods: performed a single-center, double-blind, randomized, placebo-controlled trial (registered at ClinicalTrials.gov; NCT02330094) from November 24, 2014, to June 2017, where aSAH patients received either dose-escalating or oral placebo, both...

10.3389/fneur.2020.00744 article EN cc-by Frontiers in Neurology 2020-07-28

Alzheimer's disease (AD) is a progressive, irreversible neurodegenerative that destroys memory and cognitive function. Aggregates of hyperphosphorylated tau protein are prominent feature in the brain patients with AD, major contributor to neuronal toxicity progression. However, factors initiate toxic cascade results hyperphosphorylation sporadic AD unknown. Here we investigated whether degeneration basal forebrain cholinergic neurons (BFCNs) and/or resultant decrease neurotrophin signaling...

10.3233/jad-160805 article EN Journal of Alzheimer s Disease 2016-10-21

Subarachnoid hemorrhage is a devastating form of stroke with often detrimental outcomes for patients. Here we describe patient subarachnoid treated nimodipine, which resulted in marked bradycardia junctional atrioventricular heart block. Nimodipine metabolized predominantly by the cytochrome P450 3A subfamily, and its use associated adverse events, such as hypotension bradycardia, can be exacerbated advanced age. Our had CYP3A5*3/*3 genotype, possibly predisposing her to poor metabolism this...

10.2217/pgs-2019-0136 article EN Pharmacogenomics 2020-04-01

Summary Astrocytes are the most common glial cell type in brain, yet, it is unclear how their activation affects transcriptome of neighboring cells. Engineered G protein-coupled receptors (GPCRs) called Designer Receptors Exclusively Activated by Drugs (DREADDs) enable selective specific types, such as astrocytes. Here, we combine astrocytes hippocampus and cortex healthy mice with single-cell RNA sequencing. Our data show that long-term dramatically alters microglia. Genes were...

10.1101/2020.04.27.064881 preprint EN cc-by bioRxiv (Cold Spring Harbor Laboratory) 2020-04-28

Abstract Background We conducted a preliminary phase I, dose-escalating, safety, and tolerability trial in the population of patients with acute intracerebral hemorrhage (ICH) by using human allogeneic bone marrow–derived mesenchymal stem/stromal cells. Methods Eligibility criteria included nontraumatic supratentorial hematoma less than 60 mL Glasgow Coma Scale score greater 5. All were monitored neurosciences intensive care unit for safety cell infusion adverse events. also explored use...

10.1007/s12028-023-01897-w article EN cc-by Neurocritical Care 2023-12-19

Abstract Nimodipine, an L-type cerebroselective calcium channel antagonist, is the only drug approved by US Food and Drug Administration for neuroprotection of patients with aneurysmal subarachnoid hemorrhage (aSAH). Four randomized, placebo-controlled trials nimodipine demonstrated clinical improvement over placebo; however, these occurred before precision medicine pharmacogenomics was readily available. The standard enteral dose recommended after aSAH 60 mg every 4 hours. However, up to...

10.1101/2024.05.16.24307178 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2024-05-16

May 9, 2019April 2019Free AccessThe Gender Gap in Neurology from the American Academy of Work Force Task Report: Implications by 2025 (S50.006)Tasneem F. Hasan, Marion T. Turnbull, Kenneth A. Vatz, Maisha Robinson, Elizabeth Mauricio, and William D. FreemanAuthors Info & AffiliationsApril 2019 issue92 (15_supplement)https://doi.org/10.1212/WNL.92.15_supplement.S50.006 Letters to Editor

10.1212/wnl.92.15_supplement.s50.006 article EN Neurology 2019-04-09
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