Neurosciences Commons^™

Alzheimer's Biomarkers Are Correlated With Brain Connectivity In Older Adults Differentially During Resting And Task States, Yang Jiang, Haiqing Huang, Erin Abner, Lucas S. Broster, Gregory A. Jicha, Frederick A. Schmitt, Richard Kryscio, Anders H. Andersen, David Powell, Linda J. Van Eldik, Brian T. Gold, Peter T. Nelson, Charles D. Smith, Mingzhou Ding

Behavioral Science Faculty Publications

β-amyloid (Aβ) plaques and tau-related neurodegeneration are pathologic hallmarks of Alzheimer’s disease (AD). The utility of AD biomarkers, including those measured in cerebrospinal fluid (CSF), in predicting future AD risk and cognitive decline is still being refined. Here, we explored potential relationships between functional connectivity (FC) patterns within the default-mode network (DMN), age, CSF biomarkers (Aβ₄₂ and pTau₁₈₁), and cognitive status in older adults. Multiple measures of FC were explored, including a novel time series-based measure [total interdependence (TI)]. In our sample of 27 cognitively normal older adults, no significant associations were found between levels of Aβ …

Connecticut's Elderly Population: An In-Depth Analysis Of Current And Future Trends In Elder Care, With A Focus On Dementia And Cognitive Decline, Emily J. Snodgrass

Honors Scholar Theses

The aging population in Connecticut currently represents ~15% of the state’s population but is anticipated to rapidly increase over the next 20 years. My thesis is an examination of the types of interventions and programs currently available for elderly persons with memory impairment and cognitive decline, as well as the challenges associated with caring for a larger elderly population. Data collected from interviews with CT healthcare and research professionals representative of the diverse specialties of aging together with an analysis of current research literature are used to demonstrate the importance of continued research and expansion of appropriate and accessible services …

Full-Gestational Exposure To Nicotine And Ethanol Results In Long-Term Dysregulation In The Ventral Tegmental Area, Emily Elizabeth Roguski

Theses and Dissertations (ETD)

Nicotine is considered a gateway drug for other drugs of abuse. The majority of smokers that begin smoking in adolescence, continue into adulthood. Multiple factors have been linked with smoking initiation, including maternal smoking. Drug exposure during pregnancy has long been suspected to exert deleterious effects on the fetal brain. Concurrent use of smoking and drinking alcohol throughout pregnancy is an all too frequent occurrence in the human population especially in disadvantaged and younger women.

The present study investigated the potential contributing factors for the enhanced nicotine selfadministration as seen in offspring with gestational exposure to nicotine and ethanol (Nic+EtOH).* …

Microglial Disruption In Young Mice With Early Chronic Exposure To Lead, Christina Sobin, Mayra Flores Montoya, Natali Parisi, Tanner Schaub, Miguel Cervantes, Rodrigo Armijos

Selected Works Temporary Series

The mechanisms by which early chronic lead (Pb) exposure alters brain development have not been identified. We examined neuroimmune system effects in C57BL/6J mice with Pb exposure, including levels that may be common among children in lower socioeconomic income environments. Pups were exposed via dams’ drinking water from birth to post-natal day 28 to low, high or no Pb conditions. We compared gene expression of neuroinflammatory markers (study 1); and microglial mean cell body volume and mean cell body number in dentate gyrus, and dentate gyrus volume (study 2). Blood Pb levels in exposed animals at sacrifice (post-natal day 28) …

Increasing Parity Is Associated With Cumulative Effects On Memory, Laura M. Glynn

Psychology Faculty Articles and Research

BACKGROUND: The purpose of this investigation was to determine if reproductive experience is associated with cumulative effects on human memory performance during pregnancy and if these effects persist into the postpartum period.

METHODS: Verbal recall memory performance was assessed in 254 women four times during pregnancy and at 3 months postpartum. The relation between parity and memory function was evaluated with hierarchical linear modeling and analysis of covariance (ANCOVA).

RESULTS: The data indicate that the previously documented adverse effects of pregnancy on memory performance are compounded with successive pregnancies. During gestation and postpartum, multiparity was associated with poorer memory function, …

Patterns Of Fetal Heart Rate Response At ∼30 Weeks Gestation Predict Size At Birth, C. Sandman, C. J. Cordova, E. P. Davis, Laura M. Glynn, C. Buss

Psychology Faculty Articles and Research

There is evidence that fetal exposure to maternal stress is associated with adverse birth outcomes. Less is known about the association between fetal responses to a stressor and indicators of fetal maturity and developmental outcomes. The purpose of the present study was to determine whether fetal heart rate (FHR) patterns in response to a startling stimulus at ∼30 weeks of gestation were associated with gestational age at birth and birth weight. FHR was measured in 156 maternal–fetal dyads following a vibroacoustic stimulus. All pregnancies were singleton intrauterine pregnancies in English-speaking women who were primarily married, middle class, White and at …

Δ-Aminolevulinic Acid Dehydratase Single Nucleotide Polymorphism 2 And Peptide Transporter 2*2 Haplotype May Differentially Mediate Lead Exposure In Male Children, Christina Sobin, Natali Parisi, Tanner Schaub, Marisela Gutierrez, Alma Ortega

Selected Works Temporary Series

Child low-level lead (Pb) exposure is an unresolved public health problem and an unaddressed child health disparity. Particularly in cases of low-level exposure, source removal can be impossible to accomplish, and the only practical strategy for reducing risk may be primary prevention. Genetic biomarkers of increased neurotoxic risk could help to identify small subgroups of children for early intervention. Previous studies have suggested that, by way of a distinct mechanism, d-aminolevulinic acid dehydratase single nucleotide polymorphism 2 (ALAD2) and/or peptide transporter 2*2 haplotype (hPEPT2*2) increase Pb blood burden in children. Studies have not yet examined whether sex mediates the effects …

The Role Of Glutamate And Its Receptors In Mesocorticolimbic Dopaminergic Regions In Opioid Addiction, Yuan Guo, Hui-Ling Wang, Xiao-Hui Xiang, Yan Zhao

United States Public Health Resources

Accumulating evidence suggests that glutamate, as one of the most important excitatory neurotransmitters in the brain, plays a key role in drug addiction including opioid addiction. There is substantial evidence for glutamatergic projections into mesocorticolimbic dopaminergic neurons, which are associated with opioid psychological dependence and are also the key regions of enhancement effect. Glutamate may be involved in the process of opioid addiction not only by acting on its ionotropic and metabotropic glutamate receptors that activate several signal transduction pathways, but also by interacting with other neurotransmitters or neuropeptides such as opioids, dopamine, y-aminobutyric acid and substance P in the …

Residency Program At Michael E Debakey Department Of Surgery, Baylor College Of Medicine, F Charles Brunicardi

Faculty, Staff and Students Publications

No abstract provided.