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Articles 1 - 10 of 10
Full-Text Articles in Medicine and Health Sciences
Homocysteine, Vitamin B12, And Folic Acid Levels In Alzheimer's Disease, Mild Cognitive Impairment, And Healthy Elderly: Baseline Characteristics In Subjects Of The Australian Imaging Biomarker Lifestyle Study., Noel Faux, Kathryn Ellis, Lorine Porter, Chris Fowler, Simon Laws, Ralph Martins, Kelly Pertile, Alan Rembach, Chris Rowe, Rebecca Rumble, Cassandra Szoeke, Kevin Taddei, Tania Taddei, Brett Trounson, Victor Villemagne, Vanessa Ward, David Ames, Colin Masters, Ashley Bush
Homocysteine, Vitamin B12, And Folic Acid Levels In Alzheimer's Disease, Mild Cognitive Impairment, And Healthy Elderly: Baseline Characteristics In Subjects Of The Australian Imaging Biomarker Lifestyle Study., Noel Faux, Kathryn Ellis, Lorine Porter, Chris Fowler, Simon Laws, Ralph Martins, Kelly Pertile, Alan Rembach, Chris Rowe, Rebecca Rumble, Cassandra Szoeke, Kevin Taddei, Tania Taddei, Brett Trounson, Victor Villemagne, Vanessa Ward, David Ames, Colin Masters, Ashley Bush
Simon Laws
There is some debate regarding the differing levels of plasma homocysteine, vitamin B12 and serum folate between healthy controls (HC), mild cognitive impairment (MCI), and Alzheimer's disease (AD). As part of the Australian Imaging Biomarker Lifestyle (AIBL) study of aging cohort, consisting of 1,112 participants (768 HC, 133 MCI patients, and 211 AD patients), plasma homocysteine, vitamin B12, and serum and red cell folate were measured at baseline to investigate their levels, their inter-associations, and their relationships with cognition. The results of this cross-sectional study showed that homocysteine levels were increased in female AD patients compared to female HC subjects …
Olfactory Dysfunction Is Associated With Subjective Memory Complaints In Community-Dwelling Elderly Individuals, Hamid Sohrabi, Kristyn Bates, Mark Rodrigues, Kevin Taddei, Simon Laws, Nicola Lautenschlager, Satvinder Dhaliwal, Amy Johnston, Alan Mackay-Sim, Samuel Gandy, Jonathan Foster, Ralph Martins
Olfactory Dysfunction Is Associated With Subjective Memory Complaints In Community-Dwelling Elderly Individuals, Hamid Sohrabi, Kristyn Bates, Mark Rodrigues, Kevin Taddei, Simon Laws, Nicola Lautenschlager, Satvinder Dhaliwal, Amy Johnston, Alan Mackay-Sim, Samuel Gandy, Jonathan Foster, Ralph Martins
Simon Laws
Olfactory dysfunction has been reported in clinical and preclinical phases of Alzheimer's disease. Subjective memory complaints have been proposed as a potential early indicator for increased risk of Alzheimer's disease, but have also been associated with depression, personality characteristics, and health problems. In this study, we aimed to determine which of these putative markers can predict memory complaints in community-dwelling elderly individuals, focusing on olfactory symptoms. A cohort of 144 elderly volunteers (42 males and 102 females), aged 50 to 86, was recruited from an ongoing longitudinal study. Participants were assessed for olfactory capacities (threshold, discrimination, and identification), subjective memory …
Plasma Amyloid-Β As A Biomarker In Alzheimer's Disease: The Aibl Study Of Aging , James Lui, Simon Laws, Qiao-Xin Li, Victor Villemagne, David Ames, Belinda Brown, Ashley Bush, Karl De Ruyck, Jasmin Dromey, Kathryn Ellis, Noel Faux, Jonathan Foster, Christopher Fowler, Veer Gupta, Peter Hudson, Katrina Laughton, Colin Masters, Kelly Pertile, Alan Rembach, Miroslava Rimajova, Mark Rodrigues, Christopher Rowe, Rebecca Rumble, Cassandra Szoecke, Kevin Taddei, Tania Taddei, Brett Trounson, Vanessa Ward
Plasma Amyloid-Β As A Biomarker In Alzheimer's Disease: The Aibl Study Of Aging , James Lui, Simon Laws, Qiao-Xin Li, Victor Villemagne, David Ames, Belinda Brown, Ashley Bush, Karl De Ruyck, Jasmin Dromey, Kathryn Ellis, Noel Faux, Jonathan Foster, Christopher Fowler, Veer Gupta, Peter Hudson, Katrina Laughton, Colin Masters, Kelly Pertile, Alan Rembach, Miroslava Rimajova, Mark Rodrigues, Christopher Rowe, Rebecca Rumble, Cassandra Szoecke, Kevin Taddei, Tania Taddei, Brett Trounson, Vanessa Ward
Simon Laws
Amyloid-β (Aβ) plays a central role in the pathogenesis of Alzheimer's disease (AD) and has been postulated as a potential biomarker for AD. However, there is a lack of consensus as to its suitability as an AD biomarker. The objective of this study was to determine the significance of plasma Aβ as an AD biomarker and its relationship with Aβ load and to determine the effect of different assay methods on the interpretation of Aβ levels. Plasma Aβ1-40, Aβ1-42, and N-terminal cleaved fragments were measured using both a commercial multiplex assay and a well-documented ELISA in 1032 individuals drawn from …
The Relationship Between Memory Complaints, Perceived Quality Of Life And Mental Health In Apolipoprotein Eepsilon4 Carriers And Non-Carriers, Hamid Sohrabi, Kristyn Bates, Mark Rodrigues, Kevin Taddei, Georgia Martins, Simon Laws, Nicola Lautenschlager, Satvinder Dhaliwal, Jonathan Foster, Ralph Martins
The Relationship Between Memory Complaints, Perceived Quality Of Life And Mental Health In Apolipoprotein Eepsilon4 Carriers And Non-Carriers, Hamid Sohrabi, Kristyn Bates, Mark Rodrigues, Kevin Taddei, Georgia Martins, Simon Laws, Nicola Lautenschlager, Satvinder Dhaliwal, Jonathan Foster, Ralph Martins
Simon Laws
Apolipoprotein E ε4 (APOE-ε4) is a major genetic risk factor for Alzheimer's disease. In this study, we addressed the question of whether possession of the APOE-ε4 allele results in adverse effects on perceived health-related quality of life (HRQL) and on symptoms of depression and anxiety in people with subjective memory complaints (SMC). 138 healthy, community-dwelling elderly volunteers, aged 52 to 85, were assessed for HRQL, depression, and anxiety. The participants were classified as i) APOE-ε4 carriers or ii) non-carriers with a) SMC or b) without memory complaints. The possible interactions of APOE genotype, gender, and SMC on HRQL, depression, and …
The Molecular Interaction Between Type Ii Diabetes And Alzheimer’S Disease Through Cross-Seeding Of Protein Misfolding, George A. Edwards Iii
The Molecular Interaction Between Type Ii Diabetes And Alzheimer’S Disease Through Cross-Seeding Of Protein Misfolding, George A. Edwards Iii
Dissertations & Theses (Open Access)
With the population of the world aging, the prominence of diseases such as Type II Diabetes (T2D) and Alzheimer’s disease (AD) are on the rise. In addition, patients with T2D have an increased risk of developing AD compared to age-matched individuals, and the number of AD patients with T2D is higher than among aged-matched non-AD patients. AD is a chronic and progressive dementia characterized by amyloid-beta (Aβ) plaques, neurofibrillary tangles (NFTs), neuronal loss, brain inflammation, and cognitive impairment. T2D involves the dysfunctional use of pancreatic insulin by the body resulting in insulin resistance, hyperglycemia, hyperinsulinemia, pancreatic beta cell (β-cell) death, …
Intracranial Injection Of Gammagard, A Human Ivig, Modulates The Inflammatory Response Of The Brain And Lowers AΒ In App/Ps1 Mice Along A Different Time Course Than Anti-AΒ Antibodies, Tiffany L. Sudduth, Abigail Greenstein, Donna M. Wilcock
Intracranial Injection Of Gammagard, A Human Ivig, Modulates The Inflammatory Response Of The Brain And Lowers AΒ In App/Ps1 Mice Along A Different Time Course Than Anti-AΒ Antibodies, Tiffany L. Sudduth, Abigail Greenstein, Donna M. Wilcock
Sanders-Brown Center on Aging Faculty Publications
Gammagard IVIg is a therapeutic approach to treat Alzheimer's disease currently in phase 3 clinical trials. Despite the reported efficacy of the approach the mechanism of action is poorly understood. We have previously shown that intracranial injection of anti-Aβ antibodies into the frontal cortex and hippocampus reveals important information regarding the time course of events once the agent is in the brain. In the current study we compared IVIg, mouse-pooled IgG, and the anti-Aβ antibody 6E10 injected intracranially into the frontal cortex and hippocampus of 7-month-old APP/PS1 mice. We established a time course of events ranging from 1 …
Comprehensive Behavioral Characterization Of An App/Ps-1 Double Knock-In Mouse Model Of Alzheimer's Disease, Scott J. Webster, Adam D. Bachstetter, Linda J. Van Eldik
Comprehensive Behavioral Characterization Of An App/Ps-1 Double Knock-In Mouse Model Of Alzheimer's Disease, Scott J. Webster, Adam D. Bachstetter, Linda J. Van Eldik
Sanders-Brown Center on Aging Faculty Publications
INTRODUCTION: Despite the extensive mechanistic and pathological characterization of the amyloid precursor protein (APP)/presenilin-1 (PS-1) knock-in mouse model of Alzheimer's disease (AD), very little is known about the AD-relevant behavioral deficits in this model. Characterization of the baseline behavioral performance in a variety of functional tasks and identification of the temporal onset of behavioral impairments are important to provide a foundation for future preclinical testing of AD therapeutics. Here we perform a comprehensive behavioral characterization of this model, discuss how the observed behavior correlates with the mechanistic and pathological observations of others, and compare this model with other commonly used …
The Effects Of Chronic Calcium Dysregulation On Behavioral And Pathological Features Of Alzheimer's Disease, Jonathan Sabbagh
The Effects Of Chronic Calcium Dysregulation On Behavioral And Pathological Features Of Alzheimer's Disease, Jonathan Sabbagh
UNLV Theses, Dissertations, Professional Papers, and Capstones
Alzheimer's disease (AD) is a progressive neurodegenerative disorder whose etiology is unknown. Recent studies have implicated alterations in calcium homeostasis as a pathogenic contributor to AD. Calcium dysregulation has been observed in aged and AD brains, an event which could potentially facilitate the development of multiple pathologies observed in AD. Specifically, disrupting intracellular calcium levels in vitro has been demonstrated to increase amyloid-beta (Aβ) production, tau phosphorylation, and neuronal loss. However, there is a paucity of data on the behavioral and biochemical consequences of chronic in vivo perturbation of calcium homeostasis. In a series of experiments designed to evaluate the …
A Study Of Small Rnas From Cerebral Neocortex Of Pathology-Verified Alzheimer's Disease, Dementia With Lewy Bodies, Hippocampal Sclerosis, Frontotemporal Lobar Dementia, And Non-Demented Human Controls, Sébastien S. Hébert, Wang-Xia Wang, Qi Zhu, Peter T. Nelson
A Study Of Small Rnas From Cerebral Neocortex Of Pathology-Verified Alzheimer's Disease, Dementia With Lewy Bodies, Hippocampal Sclerosis, Frontotemporal Lobar Dementia, And Non-Demented Human Controls, Sébastien S. Hébert, Wang-Xia Wang, Qi Zhu, Peter T. Nelson
Sanders-Brown Center on Aging Faculty Publications
MicroRNAs (miRNAs) are small (20-22 nucleotides) regulatory non-coding RNAs that strongly influence gene expression. Most prior studies addressing the role of miRNAs in neurodegenerative diseases (NDs) have focused on individual diseases such as Alzheimer's disease (AD), making disease-to-disease comparisons impossible. Using RNA deep sequencing, we sought to analyze in detail the small RNAs (including miRNAs) in the temporal neocortex gray matter from non-demented controls (n = 2), AD (n = 5), dementia with Lewy bodies (n = 4), hippocampal sclerosis of aging (n = 4), and frontotemporal lobar dementia (FTLD) (n = 5) cases, together accounting for the most prevalent …
Neuropathological Alterations In Alzheimer's Disease: An Up Close Look At Sympathetic Sprouting, Amy Renee Nelson
Neuropathological Alterations In Alzheimer's Disease: An Up Close Look At Sympathetic Sprouting, Amy Renee Nelson
All ETDs from UAB
Pathological hallmarks of AD include neurofibrillary tau tangles, amyloid beta (Abeta) accumulation and cholinergic degeneration. Cholinergic degeneration can be mimicked in rats by lesioning cholinergic neurons in medial septum. Hippocampal cholinergic denervation disrupts retrograde transport of nerve growth factor (NGF), leading to its accumulation, which subsequently triggers sprouting of noradrenergic sympathetic fibers from the superior cervical ganglia into hippocampus. Dr. McMahon's lab previously reported that coincident with this sprouting, there is an increase in cholinergic innervation that correlates with a recovery of M1 muscarinic receptor dependent plasticity at CA3-CA1 synapses and visual cortex. These findings suggest that noradrenergic sympathetic sprouting …