The Relationship Between Cannabis Use And Symptoms And Relapse In Psychosis
Funder
National Health and Medical Research Council
Funding Amount
$169,604.00
Summary
Cannabis is increasingly widely used and abused by young people. Use in young people with schizophrenia is even more extensive. There is some suggestion that this drug use is a result of their illness, ie to reduce unpleasant symptoms or feelings. Equally the drug may contribute to their psychosis. This study aims to assess the degree to which psychosis may be caused by cannabis use in vulnerable young people.
Quantifying The Neurocognitive Impact Of Cannabis Across The Life Span: The Evolution Of Memory Deficits.
Funder
National Health and Medical Research Council
Funding Amount
$516,572.00
Summary
Cannabis is the most widely used illicit substance, and its use is particularly prevalent during adolescence and young adulthood. Adolescence is also a period when the brain undergoes significant structural and functional change, and there is growing evidence that the brain may be particularly vulnerable to the effects of addictive substances during this developmental stage. There is increasing evidence that long term or heavy use of cannabis impairs learning and memory. It is thought that the c ....Cannabis is the most widely used illicit substance, and its use is particularly prevalent during adolescence and young adulthood. Adolescence is also a period when the brain undergoes significant structural and functional change, and there is growing evidence that the brain may be particularly vulnerable to the effects of addictive substances during this developmental stage. There is increasing evidence that long term or heavy use of cannabis impairs learning and memory. It is thought that the continued bombardment of the brain s own natural cannabis-like neurotransmitter system by the active chemicals within cannabis disrupts critical aspects of brain function. This research seeks to improve our understanding of the way that cannabis use affects memory and how these problems might develop or worsen from adolescence to adulthood. This project will investigate memory processes in cannabis users using functional brain imaging techniques. This will allow identification of regions of the brain that are not working efficiently when cannabis users attempt to memorise and recall words from a list and recognise patterns. The project will examine how different levels of cannabis use (long term vs. short term and heavy vs. light) may affect brain function during learning and memory, and determine if the observed memory problems depend upon the age at which cannabis use began and the gender of the user. The findings from this research will substantially contribute to our understanding of the ways in which cannabis use affects brain function and potentially triggers serious psychiatric disorders, such as schizophrenia. The findings will contribute to guidelines regarding hazardous levels of cannabis use within adolescent and adult populations, and will inform debate, policy, education and treatment.Read moreRead less
Progressing Life Course Research In Psychiatric Epidemiology
Funder
National Health and Medical Research Council
Funding Amount
$331,674.00
Summary
Mental health and alcohol disorders are major public health problems which cause long-term disabilities, poor health and early mortality. Addressing these problems requires a better understanding of the early factors leading to these disorders. This research program represents a unique opportunity to increase our knowledge of the origins of these disorders and significantly contribute to improved mental health and alcohol prevention policies and programs.
The Risk Factors For Ecstasy And Related Drug Overdose: A Case-crossover Study
Funder
National Health and Medical Research Council
Funding Amount
$406,755.00
Summary
Our ability to respond to the emergent harms of Ecstasy and Related Drug (ERD) use is hampered by our lack of understanding of the practices users engage in that place them at risk of harm. This study will examine the risk factors for non-fatal ERD Emergency Department (ED) admission in a sample of non-fatal ERD overdose victims recruited through two hospital EDs in Melbourne. The research involves a case-crossover study of the risk factors for ERD-related ED admission, as well as a detailed cas ....Our ability to respond to the emergent harms of Ecstasy and Related Drug (ERD) use is hampered by our lack of understanding of the practices users engage in that place them at risk of harm. This study will examine the risk factors for non-fatal ERD Emergency Department (ED) admission in a sample of non-fatal ERD overdose victims recruited through two hospital EDs in Melbourne. The research involves a case-crossover study of the risk factors for ERD-related ED admission, as well as a detailed case series of ERD-related ED admissions. The case-crossover investigation will involve a comparison between behaviours occurring prior to the critical drug use episode with typical drug use behaviours and more specifically those occurring prior to a control use episode (another occasion on which ERDs were used). Data will be collected by Researchers positioned in the ED, with information collected on the specifics of the critical and control use episodes through interviews with participants following stabilisation and a return to consciousness. The case series will be established from all ERD-related ED admissions flagged as such by triage nurses. Potential risk factors under study will include the environmental conditions in which the drug was used (eg time of day, physical location), other drug taking behaviour, personal factors (eg asthma, depression) and other dose-related issues (eg amount purchased, source of purchase). Statistical analysis will establish the major differences between the critical, typical and control use episodes. The proposed research will examine risk factors for ERD-related harms within the context of an understanding of the usual practices and behaviour of users of these drugs. Identifying transient change in risk behaviours will provide a foundation for developing contextually-sensitive strategies for harm minimisation. The development of a detailed case series will impact upon the treatment and management of acute ERD-related harms.Read moreRead less
The Natural History Of Injecting Drug Use Among IDU In Melbourne: A Prospective Cohort Study
Funder
National Health and Medical Research Council
Funding Amount
$760,869.00
Summary
Our response to the emergent epidemic of methamphetamine injection is hampered by our lack of understanding of injecting drug use (IDU) natural history that place users at risk of harm and the effectiveness of interventions. This study will examine typical trajectories of IDU and provide a framework for service evaluation. The study will focus on untreated methamphetamine and heroin users, providing the first clear indication of the comparative harms associated with these different types of IDU.
The Role Of Neuropeptides In The Acute And Long-term Effects Of MDMA, Methamphetamine And GHB
Funder
National Health and Medical Research Council
Funding Amount
$472,321.00
Summary
The widespread use of 'party drugs' (ecstasy, methamphetmaine and GHB) is a major health issue in Australia. We propose a novel hypothesis that key acute and long-term effects of these drugs may involve an action on the neuropeptide oxytocin. A number of experiments are planned to test this hypothesis. The findings from this project will be used to better understand and to explore novel treatments for people who suffer problems as a result of using these drugs.
Preclinical Validation Of Oxytocin As A Novel Treatment For Alcohol Dependence
Funder
National Health and Medical Research Council
Funding Amount
$517,624.00
Summary
Alcohol dependence is a major cause of mental and physical illness in Australia. Current medications for treating this condition are of limited effectiveness. This project will investigate the ability of the hormone oxytocin to reduce alcohol abuse and alcohol craving and to reverse the brain damage that alcohol causes. The project will also develop new medications, based on oxytocin, but with more powerful and longer lasting effects. These medications may provide a breakthrough in the fight aga ....Alcohol dependence is a major cause of mental and physical illness in Australia. Current medications for treating this condition are of limited effectiveness. This project will investigate the ability of the hormone oxytocin to reduce alcohol abuse and alcohol craving and to reverse the brain damage that alcohol causes. The project will also develop new medications, based on oxytocin, but with more powerful and longer lasting effects. These medications may provide a breakthrough in the fight against alcoholism.Read moreRead less
Psychosocial Disorders Of Youth: A Population-based Prospective Study Into Young Adulthood
Funder
National Health and Medical Research Council
Funding Amount
$450,939.00
Summary
Much earlier work in adults has pointed to the teens as a common point at which many of the important causes of chronic disease and disability in adults begin. These include problems such as tobacco use, depression and anxiety disorders, obesity, alcohol abuse and illicit drug use. However, only a prospective study is able to clarify to what extent common health risk behaviours of teenagers pose a threat to later health and well-being and what characteristics indicate those most likely to go on ....Much earlier work in adults has pointed to the teens as a common point at which many of the important causes of chronic disease and disability in adults begin. These include problems such as tobacco use, depression and anxiety disorders, obesity, alcohol abuse and illicit drug use. However, only a prospective study is able to clarify to what extent common health risk behaviours of teenagers pose a threat to later health and well-being and what characteristics indicate those most likely to go on to problems such as nicotine dependence, recurrent depression and illicit drug abuse. The proposal deals with the follow-up ten years on of a representative sample of 2000 Victorian teenagers. Seven earlier waves of data collections have ascertained levels and risk factors for common behavioural and mental health problems in the teens and early twenties. These problems included depression and anxiety, smoking, heavy alcohol consumption, illicit drug use, deliberate self-harm, obesity, eating disorder, sexually risky behaviour, intravenous drug use, antisocial behaviours and accidental injury. This follow-up of participants at the age of 24 to 25 years will ascertain persisting rates of these problems including levels of substance dependence and mental disorder. Social outcomes such as educational achievement, employment, relationships, parenthood and friendships will be ascertained. In addition mouth washes will be used to collect DNA to allow investigation of genes that may make a contribution to more severe mental disorder and substance dependency. This study will give a clear picture of the outcome and consquences of common adolescent health problems. It will also clarify further psychosocial factors that contribute to their onset or outcome. Together with an analysis of candidate genes the study should make a great contribution to the information necessary for planning effective preventive intervention.Read moreRead less