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Gene-environment Interaction In Healthy Brain Ageing And Age Related Neurodegeneration
Funder
National Health and Medical Research Council
Funding Amount
$2,162,805.00
Summary
Healthy ageing is characterised by low level of disability, high cognitive and functional capacity, and an active engagement in life. The most important ingredient of healthy ageing is a healthy brain, bereft of age-related diseases and dysfunction. Brain ageing and brain diseases are determined by multiple genetic factors that interact with environmental influences. The genes are multiple, the majority of which have a small influence. This study is an attempt to identify some of these genes and ....Healthy ageing is characterised by low level of disability, high cognitive and functional capacity, and an active engagement in life. The most important ingredient of healthy ageing is a healthy brain, bereft of age-related diseases and dysfunction. Brain ageing and brain diseases are determined by multiple genetic factors that interact with environmental influences. The genes are multiple, the majority of which have a small influence. This study is an attempt to identify some of these genes and investigate their interactions with environmental factors. It will use a unique resource, the NHMRC Australian Twin Registry (ATR) to identify elderly twins, and will also include the siblings of these twins so as to increase the ability to identify the important factors. The participants, who are listed on the ATR and recruited from NSW, Queensland and Victoria, will receive detailed neurological, psychiatric and cognitive assessments, and will undergo brain MRI scans. Their blood samples will be used to measure key chemicals that may affect brain ageing and to extract DNA for genetic tests. They will be followed-up every two years thereafter, and changes in their brain structure and cognitive functioning will be examined. Available statistical models will be used to examine gene-environment interactions and specific genes will be explored for their contribution to the additive genetic effects. This study will yield an important resource for national and international collaborations and has the potential to discover new genes.Read moreRead less
The Diagnosis Of Depression In Alzheimer's Disease
Funder
National Health and Medical Research Council
Funding Amount
$361,000.00
Summary
During the next 3 decades the number of persons older than 85 years will more than double, and the health care need of this burgeoning population are assuming greater importance. Among the most significant but often overlooked conditions in the elderly is depression, which is associated with marked disability, functional decline, risk of hospitalization, diminished quality of life, caregiver burden, increased service utilization, and mortality from comorbid medical conditions or suicide. The Wor ....During the next 3 decades the number of persons older than 85 years will more than double, and the health care need of this burgeoning population are assuming greater importance. Among the most significant but often overlooked conditions in the elderly is depression, which is associated with marked disability, functional decline, risk of hospitalization, diminished quality of life, caregiver burden, increased service utilization, and mortality from comorbid medical conditions or suicide. The World Health Organization predicts that by 2020 depression will be second only to heart disease as a cause of disability and premature death in established market economies. Depression is missed in approximately half of all elderly persons with mood disorder, and this frequency is certainly higher among individuals with dementia. The strategy to diagnose depression in dementia needs to be revised. Patients' reports are often unreliable due to memory problems and lack of full insight into their mood and behavioural changes. Caregivers may overestimate patients' symptoms of depression, especially when they themselves are depressed and overburdened, and clinicians' diagnoses are sometimes based on biased information and short observation periods. The situation in nursing homes is even worse, and there is a shortage of studies on how to diagnose depression in institutionalised patients with dementia. Using specific instruments to assess mood, behaviour and cognition we will develop valid and reliable criteria to diagnose depression in the different stages of dementia, and for patients living in different settings. This will facilitate the early recognition and adequate treatment of depression in individuals with dementia, it will greatly improve patient's quality of life, and will have a positive impact on caregivers' psychological well-being.Read moreRead less
Plasma protein profiles in normal brain ageing and early stages of dementia. Brain changes related to ageing and dementia are associated with altered proteins that can be detected in the blood. This project will examine blood samples from a number of well-characterised ageing cohorts to discover proteins that may serve as potential markers of brain ageing and the early stages of dementia.