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Full-Text Articles in Medicine and Health Sciences
Investigation To Examine The Profile Of Auditory Brainstem And Hearing Thresholds Using Tone Burst Audiometry Brainstem Response In A Preclinical Migraine Model, Megan Huelsing
MSU Graduate Theses
Migraine is a disabling neurological disease that is characterized by prominent auditory symptoms, including hyperacusis, which is defined as extreme sensitivity to sounds. The goal of this study was to investigate changes in hearing sensitivity and neural changes in the brainstem by measuring neural activity of the auditory brainstem in an established preclinical model of chronic migraine. To induce a chronic migraine state within the trigeminal system, male and female Sprague Dawley rats were subjected to three known human risk factors including neck muscle tension and REM sleep deprivation that promote latent sensitization, and exposure to a pungent odor, which …
Pituitary Adenylate Cyclase-Activating Polypeptide Receptor Activation In The Hypothalamus Recruits Unique Signaling Pathways Involved In Energy Homeostasis, Brian Maunze, Katherine Wood Bruckner, Nikhil Nilesh Desai, Christopher Chen, Fanghong Chen, David Baker, Sujean Choi
Pituitary Adenylate Cyclase-Activating Polypeptide Receptor Activation In The Hypothalamus Recruits Unique Signaling Pathways Involved In Energy Homeostasis, Brian Maunze, Katherine Wood Bruckner, Nikhil Nilesh Desai, Christopher Chen, Fanghong Chen, David Baker, Sujean Choi
Biomedical Sciences Faculty Research and Publications
Pituitary adenylate cyclase activating polypeptide (PACAP) exerts pleiotropic effects on ventromedial nuclei (VMN) of the hypothalamus and its control of feeding and energy expenditure through the type I PAC1 receptor (PAC1R). However, the endogenous role of PAC1Rs in the VMN and the downstream signaling responsible for PACAP’s effects on energy balance are unknown. Numerous studies have revealed that PAC1Rs are coupled to both Gαs/adenylyl cyclase/protein kinase A (Gαs/AC/PKA) and Gαq/phospholipase C/protein kinase C (Gαq/PLC/PKC), while also undergoing trafficking following stimulation. To determine the endogenous role of PAC1Rs and downstream signaling that may explain PACAP’s pleiotropic effects, we used RNA interference …
Ephrin-B3 Controls Excitatory Synapse Density Through Cell-Cell Competition For Ephbs., Nathan T. Henderson, Sylvain J. Le Marchand, Martin Hruska, Simon Hippenmeyer, Liqun Luo, Matthew B. Dalva
Ephrin-B3 Controls Excitatory Synapse Density Through Cell-Cell Competition For Ephbs., Nathan T. Henderson, Sylvain J. Le Marchand, Martin Hruska, Simon Hippenmeyer, Liqun Luo, Matthew B. Dalva
Department of Neuroscience Faculty Papers
Cortical networks are characterized by sparse connectivity, with synapses found at only a subset of axo-dendritic contacts. Yet within these networks, neurons can exhibit high connection probabilities, suggesting that cell-intrinsic factors, not proximity, determine connectivity. Here, we identify ephrin-B3 (eB3) as a factor that determines synapse density by mediating a cell-cell competition that requires ephrin-B-EphB signaling. In a microisland culture system designed to isolate cell-cell competition, we find that eB3 determines winning and losing neurons in a contest for synapses. In a Mosaic Analysis with Double Markers (MADM) genetic mouse model system in vivo the relative levels of eB3 control …
Validation And Optimisation Of A Touchscreen Progressive Ratio Test Of Motivation In Male Rats, Jonathan M. Hailwood, Christopher J. Heath, Trevor W. Robbins, Lisa M. Saksida, Timothy J. Bussey
Validation And Optimisation Of A Touchscreen Progressive Ratio Test Of Motivation In Male Rats, Jonathan M. Hailwood, Christopher J. Heath, Trevor W. Robbins, Lisa M. Saksida, Timothy J. Bussey
Brain and Mind Institute Researchers' Publications
© 2018, The Author(s). Rationale: Across species, effort-related motivation can be assessed by testing behaviour under a progressive ratio (PR) schedule of reinforcement. However, to date, PR tasks for rodents have been available using traditional operant response systems only. Objectives: Touchscreen operant response systems allow the assessment of behaviour in laboratory rodents, using tasks that share high face validity with the computerised assessments used in humans. Here, we sought to optimise a rat touchscreen variant of PR and validate it by assessing the effects of a number of manipulations known to affect PR performance in non-touchscreen paradigms. Methods: Separate groups …
Map7 Regulates Axon Morphogenesis By Recruiting Kinesin-1 To Microtubules And Modulating Organelle Transport., Stephen R. Tymanskyj, Benjamin Yang, Kristen J. Verhey, Le Ma
Map7 Regulates Axon Morphogenesis By Recruiting Kinesin-1 To Microtubules And Modulating Organelle Transport., Stephen R. Tymanskyj, Benjamin Yang, Kristen J. Verhey, Le Ma
Department of Neuroscience Faculty Papers
Neuronal cell morphogenesis depends on proper regulation of microtubule-based transport, but the underlying mechanisms are not well understood. Here, we report our study of MAP7, a unique microtubule-associated protein that interacts with both microtubules and the motor protein kinesin-1. Structure-function analysis in rat embryonic sensory neurons shows that the kinesin-1 interacting domain in MAP7 is required for axon and branch growth but not for branch formation. Also, two unique microtubule binding sites are found in MAP7 that have distinct dissociation kinetics and are both required for branch formation. Furthermore, MAP7 recruits kinesin-1 dynamically to microtubules, leading to alterations in organelle …
Intravenous Prenatal Nicotine Exposure Alters Meth-Induced Hyperactivity, Conditioned Hyperactivity, And Bdnf In Adult Rat Offspring, Ryan T. Lacy, Russell. W. Brown, Amanda J. Morgan, Charles F. Mactutus, Steven B. Harrod
Intravenous Prenatal Nicotine Exposure Alters Meth-Induced Hyperactivity, Conditioned Hyperactivity, And Bdnf In Adult Rat Offspring, Ryan T. Lacy, Russell. W. Brown, Amanda J. Morgan, Charles F. Mactutus, Steven B. Harrod
Russell W. Brown
In the USA, approximately 15% of women smoke tobacco cigarettes during pregnancy. In utero tobacco smoke exposure produces somatic growth deficits like intrauterine growth restriction and low birth we
Intravenous Prenatal Nicotine Exposure Alters Meth-Induced Hyperactivity, Conditioned Hyperactivity, And Bdnf In Adult Rat Offspring, Ryan T. Lacy, Russell. W. Brown, Amanda J. Morgan, Charles F. Mactutus, Steven B. Harrod
Intravenous Prenatal Nicotine Exposure Alters Meth-Induced Hyperactivity, Conditioned Hyperactivity, And Bdnf In Adult Rat Offspring, Ryan T. Lacy, Russell. W. Brown, Amanda J. Morgan, Charles F. Mactutus, Steven B. Harrod
ETSU Faculty Works
In the USA, approximately 15% of women smoke tobacco cigarettes during pregnancy. In utero tobacco smoke exposure produces somatic growth deficits like intrauterine growth restriction and low birth we
An In Vivo Study Of The Effects Of Perinatal Caffeine Exposure On Synaptic Efficacy In The Hippocampus Of Freely Moving Adult Rats, Jee Eun Park
Senior Theses and Projects
The synapse from the perforant path to the dentate gyrus has been widely used successfully to demonstrate long-term potentiation, a cellular model underlying learning and memory. Caffeine is one of the most widely consumed psychoactive stimulants in the world. Caffeine consumption increases in alertness, improvements in motor skills, and neurological functions, and these effects have promoted its use throughout history. Although the many short term cognitive benefits of caffeine intake are well understood, the long term effects of caffeine exposure have been widely disputed. Despite this, it is estimated that over 80% of women continue to consume caffeine throughout pregnancy. …
A New Obesity Model Reveals The Hypophagic Properties Of Pacap Involve The Regulation Of Homeostatic Feeding In The Ventromedial Hypothalamic Nucleus And Hedonic Feeding In The Nucleus Accumbens, Matthew M. Hurley, Brian Maunze, Jon M. Resch, Mogen M. Frenkel, M. J. Reilley, Megan E. Block, David A. Baker, Sujean Choi
A New Obesity Model Reveals The Hypophagic Properties Of Pacap Involve The Regulation Of Homeostatic Feeding In The Ventromedial Hypothalamic Nucleus And Hedonic Feeding In The Nucleus Accumbens, Matthew M. Hurley, Brian Maunze, Jon M. Resch, Mogen M. Frenkel, M. J. Reilley, Megan E. Block, David A. Baker, Sujean Choi
Biomedical Sciences Faculty Research and Publications
Binge eating in humans is a complex disorder that often involves discrete, compulsive feeding sessions of highly palatable foods even in the absence of a deprivation state or hunger. Binging can be effectively modeled in rodents by providing subjects with limited access to a palatable food source (Western Diet; WD) as an adjunct to ad lib access to normal chow (Standard Chow; SC). Although this design recapitulates several fundamental characteristics observed in binge eating disorder, the binge eating observed in this paradigm is likely a product of both hedonic and homeostatic drives with the need to balance energy stores still …
Predicting Vision Loss In Healthy Aging With Manganese-Enhanced Mri Of The Rat Eye, David Bissig
Predicting Vision Loss In Healthy Aging With Manganese-Enhanced Mri Of The Rat Eye, David Bissig
Wayne State University Dissertations
In healthy aging, visual function declines throughout adulthood. Age-related changes in neuronal ion homeostasis -- specifically, increased Ca2+ influx through L-type voltage gated calcium channels (L-VGCCs) -- are believed to contribute to certain functional declines, but this possibility has not yet been tested in the neural retina. In young, mid- and old adult Long-Evans rats, we compared visual function (optokinetic tracking), as well as retinal physiology and eye morphology (Mn2+-enhanced MRI (MEMRI), which uses neuronal Mn2+ uptake as a marker of Ca2+ influx). We documented significant age-related decreases in visual performance and increases in retinal ion influx. We confirmed that …
Activation Of Peroxisome Proliferator-Activated Receptor G In Brain Inhibits Inflammatory Pain, Dorsal Horn Expression Of Fos, And Local Edema, Jenny Morgenweck, Omar D. Abdel-Aleem, Katelyn C. Mcnamara, Renee R. Donahue, M Z. Badr, Bradley K. Taylor
Activation Of Peroxisome Proliferator-Activated Receptor G In Brain Inhibits Inflammatory Pain, Dorsal Horn Expression Of Fos, And Local Edema, Jenny Morgenweck, Omar D. Abdel-Aleem, Katelyn C. Mcnamara, Renee R. Donahue, M Z. Badr, Bradley K. Taylor
Renee R. Donahue
Systemic administration of thiazolidinediones reduces peripheral inflammation in vivo, presumablybyacting at peroxisome proliferator-activated receptor g (PPARg) in peripheral tissues. Based on a rapidly growing body of literature indicating the CNS as a functional target of PPARg actions, we postulated that brain PPARg modulates peripheral edema and the processing of inflammatory pain signals in the dorsal horn of the spinal cord. To test this in the plantar carrageenan model of inflammatory pain, we measured paw edema, heat hyperalgesia, and dorsal horn expression of the immediate-early gene c-fos after intracerebroventricular (ICV) administration of PPARg ligands or vehicle. We found that ICV rosiglitazone …