Neurosciences Commons^™

Alzheimer’S Disease Biological Pet Staging Using Plasma P217+Tau, Azadeh Feizpour, Vincent Doré, Natasha Krishnadas, Pierrick Bourgeat, James D. Doecke, Ziad S. Saad, Gallen Triana-Baltzer, Simon M. Laws, Rosita Shishegar, Kun Huang, Christopher Fowler, Larry Ward, Colin Masters, Jurgen Fripp, Hartmuth Kolb, Victor Villemagne, Christopher Rowe

Research outputs 2022 to 2026

Background: Plasma phospho-tau biomarkers, such as p217+tau, excel at identifying Alzheimer’s disease (AD) neuropathology. However, their ability to substitute for tau PET to identify AD biological stage is unclear. Methods: Participants included 248 cognitively unimpaired (CU) and 227 cognitively impaired (CI) individuals, with Janssen plasma p217+tau Simoa® assay, 18F-NAV4694 Aβ-PET (A) and 18F-MK6240 tau-PET (T) data. Biological PET stages were defined according to the Revised Criteria for Diagnosis and Staging of Alzheimer’s Disease (2024): Initial (A + T-), Early (A + TMTL +), Intermediate (A + TMOD +), and Advanced (A + THIGH +). The threshold for A+ was 25 …

Caveolin 1 And 2 Enhance The Proliferative Capacity Of Bcam-Positive Corneal Progenitors, Yuzuru Sasamoto, Shoko Kiritoshi, Catherine A.A. Lee, Yoshiko Fukuda, Gabrielle Martin, Bruce R. Ksander, Markus H. Frank, Natasha Y. Frank

Research outputs 2022 to 2026

Caveolin (CAV) 1 and 2 are integral membrane proteins that constitute major components of small membrane pouches termed caveolae. While several functions have been described in other tissues, the roles of CAV1 and CAV2 in the ocular surface have remained unknown. In the current study, we investigated the expression and function of CAV1 and CAV2 in the human cornea. We found CAV1 and CAV2 to be preferentially expressed by proliferative Basal Cell Adhesion Molecule (BCAM)-positive progenitor cells along the entire limbal and corneal basal epithelial layer. Functional gene knockdown studies reveal that BCAM, BCAM co-expressed Laminin α5 (LAMA5) and Laminin …

What Are The Optimal Transcranial Direct Current Stimulation Parameters And Design Elements To Modulate Corticospinal Excitability? A Systematic Review And Longitudinal Meta-Analysis, Liam C. Tapsell, Matheus D. Pinto, Ann Maree Vallence, Casey Whife, Maria Luciana Perez Armendariz, Shaswat Senger, Jack Andringa-Bate, Dana Hince, Myles C. Murphy

Research outputs 2022 to 2026

Background: Corticospinal excitability, measured by motor-evoked potentials (MEPs), is often impaired in neurological and musculoskeletal conditions. Transcranial direct current stimulation (tDCS) can modulate cortical excitability and improve clinical outcomes, yet inconsistencies in parameter settings complicate identification of optimal protocols. Objective: Our primary objective was to examine the effects of: (i) stimulation polarity, (ii) duration, (iii) intensity, (iv) frequency, (v) electrode montage, and (vi) electrode design (size/shape) on MEP size. Methods: Nine databases were searched from inception to 24th November 2023. We identified 84 individual cohorts (1,709 participants) and assessed time-dependent effects of each parameter on M1 MEP-to-baseline ratio in healthy …

Profiling Tumour-Infiltrating Immune Cells In A Large Paediatric Medulloblastoma Cohort: A Retrospective Analysis, Mingze Chen, Xiangjun Shi, Yi Wang, Jiao Zhang, Jirong Guo, Xiuchen Guan, Yu Sun, Wenhao Wu, Chunde Li, Yongji Tian, Yunwei Ou, Tian Li, Kai Jiang, Michael D Taylor, Xuebin Liao, Liwei Zhang, Tao Sun

Faculty, Staff and Students Publications

Background: Tumour-infiltrating immune cells exert both pro-tumour and anti-tumour effects on intracranial tumours. In this study, we investigated the prognostic value of various infiltrating immune cells in medulloblastoma (MB) within a large cohort.

Methods: We employed multiplex immunofluorescent (mIF) staining of tissue microarrays to assess the densities of T cells, B cells, NK cells, macrophages, and immune checkpoints in tumour samples from 249 primary paediatric patients with primary MB. Overall survival (OS) analysis, progression-free survival (PFS), and Cox regression analyses were utilised to explore potential relationships between immune cell densities and survival outcomes. Subsequently, multivariate Cox regression was validated using …

Alteration Of Gut Microbial Ecology By The Direct Activation Of The Brain: Inverse Gut-Microbiome-Brain Dynamics, I-Ching Wang, Jessica L Swanson, Jillian L Waters, Mikhail Y Kochukov, Shelly A Buffington, Sean W Dooling, Benjamin R Arenkiel, Mauro Costa-Mattioli

Faculty, Staff and Students Publications

The gut-microbiome-brain axis is a bidirectional communication system influencing host physiology and overall fitness. While "bottom-up" effects-where gut microbes influence brain function and behavior-are well established, direct evidence for "top-down" modulation-where the brain shapes the gut microbial ecology-remains elusive. Here, we show that the selective expression of the bacterial ion channel mNaChBac in glutamatergic lateral habenula (LHb) neurons increases their bursting activity and leads to endophentypes associated with depression. Importantly, this chronic activation leads to changes in the gut microbiome composition over time, as reflected by shifts in alpha-diversity and alterations in specific microbial taxa. These findings provide direct evidence …

The Effect Of Uterine Entry Technique On Chorioamniotic Membrane Separation In Fetoscopic Laser Photocoagulation For Twin-To-Twin Transfusion Syndrome: Protocol For A Randomized Controlled Trial, Brian A Burnett, Jessian L Munoz, Rebecca M Johnson, Christian M Parobek, Luis E Delgadillo Chabolla, Cara Buskmiller, Roopali V Donepudi, Magdalena Sanz Cortes, Michael A Belfort, Ahmed A Nassr

Faculty, Staff and Students Publications

Background: Chorioamniotic membrane separation (CAS) is a recognized complication of fetoscopic laser photocoagulation (FLP) for twin-to-twin transfusion syndrome (TTTS), associated with increased risks of preterm prelabor rupture of membranes (PPROM) and preterm birth (PTB). Although CAS is well described, its incidence and relationship to specific surgical techniques, particularly the method of uterine entry, are not well defined in the published literature. No randomized trials have evaluated whether entry technique influences the risk of CAS.

Methods: We present the protocol for a randomized controlled trial comparing sharp-trocar and Seldinger uterine entry techniques for FLP in TTTS diagnosed between 16 + 0 …

Implementation And Assessment Of The Openbci Platform As An Accessible Brain- Computer Interface, Jewell Norris

Honors Theses

OpenBCI is a low-cost, open-source platform for alternative brain-computer interface (BCI) software and hardware. This thesis evaluates OpenBCI’s electroencephalogram (EEG) and electromyography (EMG) capabilities by constructing and testing a 16-channel EEG system using the Ultracortex Mark IV headset and Cyton + Daisy biosensing board. The viability of the system was assessed through real-time BCI control and comparison to a clinical-grade EEG system. Real-time BCI control of an online falling-block game was tested via the use of eye blinks EMG (channels Fp1/Fp2) and head-tilt accelerometer inputs. The BCI game demonstrated reliable control despite minor latency and artifact sensitivity. For clinical comparison, …

Apathy Self-Awareness And Its Neural Correlates In Parkinson’S Disease, Hannah Conn, Hideo Suzuki, Zekai Jin, Ana Marin, Xi Zhu, Seonjoo Lee, Edward Huey, Ratko Radakovic, Sarah R Heilbronner, Nora Vanegas-Arroyave

Faculty, Staff and Students Publications

Apathy is a prevalent non-motor symptom in Parkinson's disease (PD) that negatively impacts quality of life. Impaired self-awareness of apathy (ISA-a) further impacts patient care by limiting engagement. While apathy has been associated with reduced fronto-striatal functional connectivity (FC), the neural basis of ISA-a remains unclear. We examined ISA-a in 52 individuals and the neural basis of ISA-a in 35 individuals with PD using a dimensional approach (i.e., initiation, executive, and emotional apathy) and resting-state fMRI (3T scanner). Apathetic PD patients (42%) showed poorer self-awareness than non-apathetic peers. Apathetic PD patients showed a trend towards reduced FC between the left …

Introducing Neuro Sscial Work: A Brief Reflection On Neuroscience And The Profession, Priscila Llamosa

Social Work Faculty Publications

This reflection introduces and contextualizes the term Neuro Social Work, which I coin to name a specialized practice area at the intersection of social work, neuroscience, and neurodiversity. Drawing on my experience as a social work educator and practitioner, I discuss social work’s uneasy relationship with neuroscience, marked both by the opportunity to deepen our understanding of trauma, development, and healing, and by the risks of using brain‑based evidence to individualize structural harms or justify surveillance of marginalized communities. I outline, in broad strokes, what distinguishes Neuro Social Work from general neuroscience‑informed practice. The note is intended as a concept …

Disinhibited Behavior Associated With Rapid Clinical Response To Deep Brain Stimulation For Obsessive-Compulsive Disorder: Illustrative Cases, Sarah S Soubra, Tommy B Liu, Zain U Naqvi, Thomas Hamre, Danika L Paulo, Kalman A Katlowitz, Nisha Giridharan, Katie Van Arsdel, Jonathan H Bentley, Kasra A Mansourian, Davin Devara, Eric A Storch, Sarah R Heilbronner, Sameer A Sheth, Wayne Goodman, Nicole R Provenza

Faculty, Staff and Students Publications

Background: Deep brain stimulation (DBS) of the ventral capsule/ventral striatum (VC/VS) can alleviate symptoms of obsessive-compulsive disorder (OCD) refractory to conventional therapies. Overstimulation, however, can elicit pathological behaviors marked by disinhibition and recklessness.

Observations: Two patients with OCD underwent DBS of the VC/VS region and met responder status within 1 month of stimulation onset, as evidenced by a ≥ 35% reduction in their Yale-Brown Obsessive Compulsive Scale score. Notably, both patients exhibited signs of disinhibited behavior soon after DBS activation, including gambling, sleep disruption, and interpersonal relationship volatility. Through careful management, responder status persisted stably beyond the transient period of …

Multisite Assembly Of Gateway Induced Clones (Magic): A Flexible Cloning Toolbox For Use In Vertebrate Model Systems, William B Gillespie, Yuwen Zhang, Oscar E Ruiz, Juan Cerda, Joshua Ortiz-Guzman, Michelle Sherman, Williamson D Turner, Gabrielle Largoza, Lili E Mosser, Esther Fujimoto, Chi-Bin Chien, Kristen M Kwan, Benjamin R Arenkiel, W Patrick Devine, Joshua D Wythe

Duncan NRI Faculty and Staff Publications

Here, we present MultiSite Assembly of Gateway Induced Clones (MAGIC), which leverages Gateway-based recombinatorial cloning technology for rapid, modular assembly of plasmids to facilitate transgenesis in cells and vertebrate animal models. The MAGIC collection of plasmids spans a range of in vitro and in vivo uses, from tools for optically and chemically tunable gene expression, to simultaneous expression of microRNAs and fluorescent reporters, to a suite of distinct subcellular compartmental fluorescent reporters, to Cre and Dre recombinase-dependent gene expression. MAGIC system components are compatible with existing MultiSite Gateway Tol2 systems currently used in zebrafish and mammalian lentiviral and adenoviral Destination …

“For Haitian Culture, Being Older [Is] A Blessing”: Perceptions Of Aging, Elderhood, And Dementia In A Haitian Born Sample, Melissa K. Eustache

USF Tampa Graduate Theses and Dissertations

This thesis investigates how first-generation Haitian immigrants in the United States understand and interpret dementia within the intersecting contexts of culture, migration, and biomedicine. While dementia is constructed as a pathological “loss of self” and a public health epidemic, in American biomedical and popular discourse, this study examines how Haitian-born individuals—socialized within a non-Western cultural and spiritual framework—make sense of cognitive decline and impairment in ways that diverge from Western biomedical narratives. Guided by theoretical orientations from medical anthropology, including Mark Nichter’s idioms of distress, Margaret Lock’s local biologies, and neuroanthropology, this research explores how cultural models of illness, aging, …

Weight Loss And A Shunt On “Off”: An Odd Case Of Overshunting In An Idiopathic Intracranial Hypertension Patient Illustrative Case, Thomas Hamre, Ashley Ricciardelli, Alex Flores, Ashwin Viswanathan

Faculty, Staff and Students Publications

Background: CSF diversion with ventriculoperitoneal (VP) shunts is a common treatment for idiopathic intracranial hypertension (IIH). Rarely, overshunting can occur. Diagnosing and managing overshunting in an IIH patient with a shunt can be challenging. The authors present a unique etiology of overshunting successfully treated with shunt ligation.

Observations: A 48-year-old female with IIH who had undergone VP shunt placement with a programmable Certas valve presented with symptoms concerning for low-pressure headaches following a 25-kg weight loss. Intracranial pressure (ICP) monitoring along with an inpatient headache diary facilitated the diagnosis of intracranial hypotension secondary to CSF overdrainage through the shunt. Following …

Ezhip Boosts Neuronal-Like Synaptic Gene Programs And Depresses Polyamine Metabolism, Elham Hasheminasabgorji, Huey-Miin Chen, Taylor A Gatesman, Subhi Talal Younes, Gabrielle A Nobles, Farhang Jaryani, Heather Mao, Kwanha Yu, Benjamin Deneen, Wee Yong, Michael D Taylor, Sameer Agnihotri, Marco Gallo

Faculty, Staff and Students Publications

It is currently understood that the characteristic loss of the repressive histone mark H3K27me3 in PFA ependymoma and diffuse midline glioma (DMG) are caused by complementary mechanisms mediated by EZHIP and the oncohistone H3K27M, respectively. To support the complementarity of these mechanisms, rare H3K27M-negative DMGs express EZHIP. Interestingly, EZHIP is one of the few genes recurrently mutated in PFA. The significance of EZHIP mutations in PFA, and whether EZHIP has wider functions in addition to repression of H3K27me3 deposition, are not known. Here, we investigated the mutational landscape of EZHIP in pediatric brain tumors. We found that EZHIP mutations occur …

Intranasal Delivery Of Extracellular Vesicles Derived From Human Bone Marrow Mesenchymal Stem Cells Dampens Neuroinflammation And Ameliorates Motor Deficits In A Mouse Model Of Cortical Stroke, Saviana Antonella Barbati, Chiara D'Amelio, Chiara Feroleto, Marta Morotti, Ida Nifo Sarrapochiello, Francesca Natale, Domenica Donatella Li Puma, Yolanda Gomez-Galvez, Elena Blanco-Suarez, Lorraine Iacovitti, Lucia Leone, Salvatore Fusco, Maria Vittoria Podda, Claudio Grassi

Department of Neuroscience Faculty Papers

Early treatment of ischemic stroke can significantly reduce disability and mortality rates. Stem cell-derived extracellular vesicles (EVs) have shown potential as therapeutics for neurological disorders. This study explored whether intranasal administration of EVs from human bone marrow mesenchymal stem cells (BM-MSCs) enhances forelimb motor function recovery in a mouse model of motor cortex stroke and investigated their mechanism of action, focusing on neuroinflammation. C57BL/6JRj mice received EV treatment of 0.1 × 10⁹ EVs per dose per day, 48 h post-stroke and twice weekly for four weeks. EV-treated mice showed significant improvement in forelimb deficits, as evaluated using a series …

Reproducibility Of Fnirs Within Subject For Visual And Motor Tasks, Julie C. Wagner, Anthony Zinos, Scott A. Beardsley, Wei-Liang Chen, Lisa Conant, Marsha Malloy, Joseph Heffernan, Brendan Quirk, Robert W. Prost, Mohit Maheshwari, Jeffrey Sugar, Harry T. Whelan

Biomedical Sciences Faculty Research and Publications

Functional Near Infrared Spectroscopy (fNIRS) is becoming a popular metric to noninvasively identify brain activity through assessing changes in oxygenated (HbO) and deoxygenated (HbR) hemoglobin concentration. Several aspects of fNIRS imaging are appealing for clinical applications but the reproducibility of fNIRS signals has yet to be determined over several sessions. To address this, four participants completed at least ten sessions on separate days where they performed Motor and Visual tasks while fNIRS signals were measured from 102 channels spanning the entire head. Reproducibility was quantified as the percentage of significant task related activity occurring across sessions at the channel and …

Vestibular Migraine And Ssri Withdrawal: A Case Report, Grace Fairchild, Sarah Redding, Ashley G. Flagge

Ashley Flagge Publications

Vestibular migraine (VM) has been described as a diagnosis of exclusion, with no one singular definitive assessment for diagnosis. It has been suggested that possible pharmaceutical intervention for VM can include antidepressant drugs, but this is potentially complicated by the fact that dizziness is a common side effect of both use and withdrawal for certain types of antidepressant medications. This article describes the case of a 56-year old with probable VM, who was previously diagnosed with depression and treated with the selective serotonin reuptake inhibitor (SSRI) Citalopram. Following discontinuation with no taper, the patient experienced a series of withdrawal side …

Cognitive Reserve Predicts Baseline Tau Burden In The Us Pointer Trial Imaging Cohort, Valory N Pavlik, Chris J Weber, Joseph C Masdeu, Laura D Baker, Melissa M Yu, Michele York, Rachel A Whitmer, Susan M Landau, Theresa M Harrison, Tomas M Holland, Laura Lovato

Faculty, Staff and Students Publications

Introduction: Higher cognitive reserve (CR) is associated with reduced dementia risk. We hypothesized that higher CR is associated with less baseline Alzheimer's disease (AD) pathology in the U.S. Study to Protect Brain Health Through Lifestyle Intervention to Reduce Risk (U.S. POINTER) cohort.

Methods: A subsample of participants underwent amyloid beta and tau positron emission tomography imaging. Regression analysis was used to model the association between educational attainment (EA) as a CR proxy measure, amyloid positivity, and entorhinal cortex (ERC) and meta-temporal region of interest (meta-ROI) tau standardized uptake value ratio (SUVR).

Results: In 911 participants with complete imaging data, higher …

Neural Signatures And Personalized Neuromodulation In A Subject Experiencing Context-Dependent Inhibitory Control Deficits, Layth S Mattar, Shraddha Shah, Lily S Chamakura, Denise Oswalt, Yue Zhang, Davin Devara, Jung Uk Kang, Zahra Jourahmad, Ryan Jafri, Geoffrey Liu, Joshua Adkinson, Isabel A Danstrom, Xiaoxu Fan, Yvonne Y Reed, Kelly R Bijanki, Alica Goldman, Lu Lin, Vaishnav Krishnan, Nicole R Provenza, Andrew J Watrous, Sameer A Sheth, Sarah R Heilbronner, Garrett P Banks, Eleonora Bartoli

Faculty, Staff and Students Publications

The ability to override prepotent actions is critical to control impulses and adjust behavior depending on goals and contextual needs. In this study, we investigate the inhibitory control abilities of a patient diagnosed with Klüver-Bucy Syndrome following a left temporal resection. The patient presented with disruptive hypersexuality symptoms akin to compulsions, leading to the inability to control and suppress inappropriate actions. The patient was recruited for the current research study while undergoing intracranial monitoring for epilepsy, to investigate the cognitive and neural processes underlying the patient's inhibitory control symptoms. We formulated the hypothesis that a reactive inhibitory control deficit emerges …

Pkr-Driven Isr Signaling Controls Synaptic Translation And Structural Plasticity In An Age-Dependent Manner, Nicolás W Martínez, Felipe Gómez, Ariel Tapia-Godoy, Juan Francisco Roa, Fernanda Moreso-Contreras, Yuwei Liu, Claudia Jara, Cheril Tapia-Rojas, Iván Alfaro, Mauro Costa-Mattioli, Soledad Matus

Faculty, Staff and Students Publications

The integrated stress response (ISR) modulates protein homeostasis in response to both intracellular and extracellular signals. The four kinases involved in the ISR all phosphorylate the same target, the alpha subunit of eukaryotic initiation factor 2 (eIF2α), to integrate various stress signals, thereby regulating cell fate. The activation of the ISR reprograms the proteome by inhibiting general protein synthesis while increasing the translation of specific mRNAs. In the brain, the ISR regulates the type of synaptic plasticity necessary for forming long-term memory. More importantly, the activation of the ISR has emerged as a causal mechanism underlying cognitive decline associated with …

Sensory-Selective Peripheral And Neuraxial Nerve Blockade With 2',6'-Pipecoloxylidide, Claire A Ostertag-Hill, Shuanglong Chen, Tianrui Xue, Rachelle Shao, Matthew Torre, Bin Feng, Zahra Vahedi, Longtu Chen, Steven J Staffa, Yueqin Zheng, Daniel S Kohane

Duncan NRI Faculty and Staff Publications

Background: Safe sensory-selective local anesthetics would be a major advance in the management of acute and chronic pain. This articles describes the sensory-selective local anesthetic properties and the toxicity profile of a known metabolite of amino-amide local anesthetics, 2',6'-pipecoloxylidide (PPX).

Methods: PPX was synthesized and made into its hydrochloride salt. PPX or ropivacaine (ROP) were injected at the sciatic nerve or intrathecally in rats, who then underwent modified hotplate (sensory) testing and weight-bearing (motor) testing. Rats injected with PPX or ROP were assessed for clinical toxicity endpoints. Conduction blockade was studied with single-unit recordings in mice. Biocompatibility was assessed histologically. …

Empowering Community Health Workers In Dementia Care In South Texas, Stephanie Santiago-Mejias, Shanae L. Rhodes, Fayron R. Epps, Robin C. Hilsabeck, Noe Garza, Sudha Seshadri, Neela K. Patel

School of Medicine Publications

Alzheimer's disease and related dementias disproportionately affect minority racial and ethnic communities. Community health workers are essential in addressing these disparities. We evaluated the impact of an educational workshop focusing on improving knowledge and preparedness in dementia care. Sixty-one CHWs attended in-person sessions in Texas and completed surveys to measure confidence and plans to apply the knowledge gained. Results revealed a significant increase in confidence in providing dementia care post-training (p < 0.001). Qualitative analysis identified five primary roles of CHWs. These findings demonstrate the potential of training interventions to improve knowledge gaps and empower CHWs to address dementia in underserved communities.

Rebound Bursting Selectively Enables Fast Dynamics In Dopamine Midbrain Neurons Projecting To The Dorsolateral Striatum, Strahinja Stojanovic, Christopher J. Knowlton, Richard Egger-Mackrodt, Johanna Mankel, Josef Shin, Stephan Lammel, Carmen C. Canavier, Jochen Roeper

School of Graduate Studies Faculty Publications

Dopamine (DA) midbrain neurons are involved in a wide array of key brain functions including movement control and reward-based learning. They are also critical for major brain disorders such as Parkinson's disease or schizophrenia. DA neurons projecting to distinct striatal territories are diverse with regard to their molecular makeup and cellular physiology, which are likely to contribute to the observed differences in temporal DA dynamics. Among these regions, the dorsolateral striatum (DLS) displays the fastest DA dynamics, which might control the moment-to-moment vigor and variability of voluntary movements. However, the underlying mechanisms for these DLS-specific fast DA fluctuations are unresolved. …

Epdevatlas: Mapping Gabaergic Cells And Microglia In The Early Postnatal Mouse Brain, Josephine K. Liwang, Fae N. Kronman, Hyun-Jae Pi, Yuan-Ting Wu, Daniel J. Vanselow, Steffy B. Manjila, Deniz Parmaksiz, Donghui Shin, Yoav Ben-Simon, Michael Taormina, Sharon W. Way, Hongkui Zeng, Bosiljka Tasic, Lydia Ng, Yongsoo Kim

School of Graduate Studies Faculty Publications

During development, brain regions follow encoded growth trajectories. Compared to classical brain growth charts, high-definition growth charts could quantify regional volumetric growth and constituent cell types, improving our understanding of typical and pathological brain development. Here, we create high-resolution 3D atlases of the early postnatal mouse brain, using Allen CCFv3 anatomical labels, at postnatal days (P) 4, 6, 8, 10, 12, and 14, and determine the volumetric growth of different brain regions. We utilize 11 different cell type-specific transgenic animals to validate and refine anatomical labels. Moreover, we reveal region-specific density changes in γ-aminobutyric acid-producing (GABAergic) neurons, cortical layer-specific cell …

Microglia Sensing Of Peripheral Signals That Bridge The Brain And Body, Claire E Young, Melanie A Samuel

Faculty, Staff and Students Publications

Microglia are the resident immune cell of the brain, and alterations in microglia signaling have been implicated in many neurodegenerative disorders. While microglia responses to central cues and other brain cell types are well documented, studies are increasingly investigating the impact of peripherally derived signals on microglia function. A diverse array of peripheral cues, including dietary components, hormones, and bacteria metabolites and components from the microbiome cross the blood brain barrier and directly influence microglia state through ligand-receptor interactions. This review highlights the complexity of brain-body interactions from the perspective of microglia function and proposes the idea that microglia could …

Injectable Microparticle-Nanoliposome Hydrogel For Extended Release Of Small Hydrophilic Molecules, Gil Aizik, Wonmin Choi, Claire A Ostertag-Hill, Matthew Torre, Daniel S Kohane

Duncan NRI Faculty and Staff Publications

Achieving sustained local release of small hydrophilic drugs is challenging and is particularly important when the drugs are toxic. To address these challenges, we developed a hybrid system comprising drug-containing microparticles embedded within a nanoliposomal hydrogel matrix. This system forms through salt-induced gelation using physiologically relevant sodium chloride concentrations (0.9%), allowing for microparticle encapsulation without harsh chemical processes. In vitro, the hybrid system exhibited a slower release of encapsulated cargo compared to microparticles or hydrogel alone. In vivo proof of principle was provided with tetrodotoxin (TTX), a small hydrophilic and ultrapotent local anesthetic, which can cause systemic toxicity if the …

Evaluation Of Over-The-Counter Cutaneous Lidocaine Cream For Temporary Deafferentation In Upper Limb Rehabilitation: A Cross-Sectional Study, Kelsey Baker, Daniel Salinas, Maria Lozano Bonilla, Jared Hensley, Hunter M. Butler, Monica Lozano Garcia, Chelsea Erazo Macias, Ashley Tijerina, Victoria Cuello, Bharathi Gadad

School of Medicine Publications

Introduction: Topical or cutaneous methods of temporary deafferentation (TD) have shown potential as a tool to augment the effects of rehabilitative approaches for neurological conditions. TD has been suggested to achieve such effects due to its ability to suppress activity from afferent input that may be inhibitory to rehabilitative processes. However, most approaches to date have utilized prescription-grade anesthetic agents, which may be difficult to translate to routine outpatient rehabilitation or in remote settings. Here, we sought to evaluate whether TD could be achieved with readily available over-the-counter (OTC) 5% lidocaine topical anesthetic. We targeted the biceps brachii for TD, …

The Fast And The Very Fast: High-Frequency Oscillations In Alzheimer's Disease, Manuel Silva-Pérez, Jeannie Chin

Faculty, Staff and Students Publications

Alzheimer's disease increases the risk of developing epilepsy together with cognitive decline. Early diagnosis or prediction of parameters associated with epileptic activity can greatly help in managing disease outcomes. Network hyperexcitability is a candidate of interest as a neurophysiological biomarker of Alzheimer's disease. High-frequency oscillations are increasingly recognized as potential biomarkers of hyperexcitability and epileptic activity. However, they have not yet been identified in Alzheimer's disease. In this study, we measured high-frequency oscillations via magnetoencephalography recordings in Alzheimer's disease patients with and without epileptic activity, as part of a Phase 2a randomized, double blind clinical trial of the efficacy of …

Addressing Language Challenges In Bilingual Neuropsychological Assessments At The South Texas Alzheimer's Disease Research Center (Adrc), Stephanie Santiago-Mejias, Gabrielle Hromas, Ashley Laroche, David A. Gonzalez, Robin C. Hilsabeck, Katya Rascovsky, Silvia Mejia-Arango, Amy Werry-Mcfarlin, Claudia Satizabal, Hector Trevino

School of Medicine Publications

Introduction: Neuropsychological assessment of bilingual (English/Spanish) individuals presents challenges that can impact test validity. Language proficiency influences cognitive performance, yet clear guidelines for determining the appropriate test language are lacking. We describe our experiences at the South Texas Alzheimer's Disease Research Center (STAC) in addressing these challenges within the context of National Alzheimer's Coordinating Center (NACC) Uniform Data Set (UDS) assessments and broader Alzheimer's Disease Research Center (ADRC) protocols. We outline steps toward a structured language assessment approach.

Methods: We implemented a process to assess language proficiency, integrating self-reported and objective measures, including the language dominance index (LDI). Case examples …

Twenty Minutes Of Corsi Block Tapping Task Training Does Not Improve Mental Rotation In Adults With Stroke, Sarah A. Kettlety, Giuliet L. Kibler, Andrew Hooyman, Christina K. Holl, Sydney Y. Schaefer, Kristan A. Leech

Physical Therapy Faculty Articles and Research

Background: Visuospatial function is commonly impaired post-stroke and is associated with motor learning and recovery. A single, twenty-minute Corsi Block Tapping Task (CBTT) training session improved visuospatial function in young neurotypical adults; however, it is unclear whether this training would improve visuospatial function in adults with stroke.

Objective: To understand if a single, twenty-minute CBTT training session improved visuospatial function in adults with stroke compared to a no-training control group of adults with stroke.

Methods: Participants post-stroke were assigned to one of two groups. The training group completed twenty minutes of computerized CBTT training. The control group completed a survey …