The Influence Of Alpha Actinins On Human Performance
Funder
National Health and Medical Research Council
Funding Amount
$542,500.00
Summary
There is a wide variation in skeletal muscle function in the general population. At one end of the spectrum are elite athletes who excel in a specialised area of sprint, power or endurance performance, while at the other end of the spectrum are individuals with muscle weakness due to inherited muscle disease. Part of this variation in human muscle performance is due to the genetic makeup of the individual. For example, world class sprinters have muscles which are genetically predisposed to gener ....There is a wide variation in skeletal muscle function in the general population. At one end of the spectrum are elite athletes who excel in a specialised area of sprint, power or endurance performance, while at the other end of the spectrum are individuals with muscle weakness due to inherited muscle disease. Part of this variation in human muscle performance is due to the genetic makeup of the individual. For example, world class sprinters have muscles which are genetically predisposed to generate maximal force at high speed. Similarly, the severity of muscle disease in an affected individual is influenced, in part, by other genes that affect normal muscle performance. The genes responsible for normal variations in muscle function in humans are unknown. The alpha-actinins are structural components of skeletal muscle. The two forms of alpha-actinin in skeletal muscle interact with a number of proteins involved in human muscle disease and thus likely contribute to the severity of muscle weakness in affected patients. Alpha-actinin-3 is present only in fast (type 2) fibres - the muscle fibres responsible for perfomance at high speed. We have identified a genetic change that results in absence of this protein in 1 in 5 people in the general population, without causing disease. We now have evidence that this genetic change, and hence whether or not muscle contains alpha-actinin-3, influences muscle performance in elite athletes. We will now use a variety of approaches to study the alpha-actinins in normal and diseased skeletal muscle. We will study the effect of changes (mutations) in the alpha-actinins in the muscle cells grown in the laboratory and in animal models. This work will impact on our understanding of how normal skeletal muscle functions, and the factors that influence human diversity in the general population.Read moreRead less
The Influence Of Alpha Actinins On Human Performance In Health And Disease
Funder
National Health and Medical Research Council
Funding Amount
$480,989.00
Summary
We have identified a common genetic variation that results in absence of the fast muscle fibre protein, a-actinin-3, in over 1 billion people worldwide. Loss of a-actinin-3 influences elite athletic performance and skeletal muscle function in the general population by altering efficiency of muscle metabolism. We will now study mice and humans to determine how a-actinin-3 deficiency influences normal muscle function with age, response to exercise and the severity of human muscle disease.
Predictors Of Poor Professional Performance In Junior Medical Staff
Funder
National Health and Medical Research Council
Funding Amount
$205,902.00
Summary
Medical practitioner performance is one significant risk factor for adverse health outcomes. Medical practitioner stress has implications for practitioner performance. Among new medical graduates working in the public hospital system environmental stressors such as long working hours have traditionally been blamed as the source of stress leading to reduced performance and adverse health outcomes. However, correction of environmental stresses does not necessarily reduce junior doctors stress or i ....Medical practitioner performance is one significant risk factor for adverse health outcomes. Medical practitioner stress has implications for practitioner performance. Among new medical graduates working in the public hospital system environmental stressors such as long working hours have traditionally been blamed as the source of stress leading to reduced performance and adverse health outcomes. However, correction of environmental stresses does not necessarily reduce junior doctors stress or improve performance, implying that additional personal factors predict for poor assessed performance. Such factors may include burnout, depression, anxiety and fixed personality traits. This project will allow a detailed analysis of causal relationships between fixed personality traits, induced stress states, and external life stresses. The relationship of each of these to performance will also be determined.Read moreRead less
Whether holding the arm still or standing, the brain uses a silent proprioceptive sense that unconsciously detects and controls our movements. Key sensory receptors for this sense are located within the muscles that are also contracting. This is a project to discover how proprioception is affected by muscle contraction and how this affects postural control. This will improve the management of many common disorders that affect movement and balance.
Human Factors And Patient Safety During Paediatric Heart Surgery: An Evidence-based Approach To Improve Patient Outcomes
Funder
National Health and Medical Research Council
Summary
The research project aims to improve outcomes of children undergoing repair of heart birth defects. The novel study is devised to engage health care providers in the re-design of surgical interventions to improve child outcomes. The collaborative approach of engaging health care providers and carers in the design of improvement interventions can help overcome the implementation gap and ensure rapid improvement and enhanced patient safety of children undergoing heart surgery repair.
Phenotypic And Functional Characterization Of Human Dendritic Cell Subsets Generated In Vitro And Isolated From Tissues
Funder
National Health and Medical Research Council
Funding Amount
$586,428.00
Summary
The immune system defends us against infections and cancer. Dendritic cells (DC) are white blood cells that have a central role to both activate the immune system and to regulate immune responses. In this study, we will determine the functional differences of human DC populations, because a clear understanding of the functional differences between different human DC types is essential for utilizing DC in designing more effective vaccines and immune therapies for clinical applications.