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Clinical Efficacy Of Haematopoietic Stem Cell Transplantation In Mucopolysaccharidosis IIIA
Funder
National Health and Medical Research Council
Funding Amount
$508,051.00
Summary
Lysosomal storage disorders (LSD) are inherited diseases that affect about 1 in 7700 Australian children; all share common physical symptoms include heart and breathing difficulties, stiff joints, skeletal deformities, enlarged head, and a characteristic facial appearance. Two-thirds of patients will also develop brain disease. The lysosome is a component of each cell in the human body; its role it is to break down and remove waste from the cell. This involves a series of proteins (enzymes) that ....Lysosomal storage disorders (LSD) are inherited diseases that affect about 1 in 7700 Australian children; all share common physical symptoms include heart and breathing difficulties, stiff joints, skeletal deformities, enlarged head, and a characteristic facial appearance. Two-thirds of patients will also develop brain disease. The lysosome is a component of each cell in the human body; its role it is to break down and remove waste from the cell. This involves a series of proteins (enzymes) that act in sequence. A LSD arises when the lysosome lacks the activity of one protein in this chain. This loss of protein activity means that the waste removal process is impaired. Waste begins to 'store', clogging the cell and interfering with its usual functions. This gives rise to devastating symptoms that worsen over time as storage increases. Brain disease in LSD has profound effects on the child: mental capacity declines, they become hyperactive and aggressive and progressively lose learned skills (e.g. walking, talking) and control of bodily functions. Mucopolysaccharidosis (or MPS) type IIIA is a LSD that affects the brain. Bone marrow transplantation (BMT) is an accepted treatment for many diseases, including cancer. However, unlike cancer and some LSD, BMT does not work in MPS IIIA children. The reasons for this are unknown. This project is important in understanding the basic mechanisms that prevent this form of therapy from working in these children. If we can understand what prevents its effectiveness, we can devise methods to overcome it and potentially offer MPS IIIA (and other LSD that do not respond to BMT) a viable treatment option. We have a colony of mice affected by MPS IIIA; their symptoms are similar to that seen in humans, making them ideal for this study.Read moreRead less
School-Age Outcomes Of Very Preterm Infants And Antenatal Magnesium Sulphate Therapy - A Randomised Controlled Trial
Funder
National Health and Medical Research Council
Funding Amount
$675,050.00
Summary
Despite recent major advances in care around the time of birth that have led to large increases in the survival rates for very preterm babies, the rate of adverse long-term health problems has not diminished in survivors, and remains too high compared with children not born very preterm. In particular they have higher rates of substantial problems with the way their brain works, particularly affecting their movement, vision, hearing, thinking and talking. We have just concluded a large clinical ....Despite recent major advances in care around the time of birth that have led to large increases in the survival rates for very preterm babies, the rate of adverse long-term health problems has not diminished in survivors, and remains too high compared with children not born very preterm. In particular they have higher rates of substantial problems with the way their brain works, particularly affecting their movement, vision, hearing, thinking and talking. We have just concluded a large clinical trial in Australia and New Zealand of magnesium sulphate which was given to mothers who were likely to deliver their baby too early (before 30 weeks of pregnancy). We have been able to show, for the first time, that magnesium sulphate was able to halve the rate of substantial problems with movement in 2 year old survivors, from 6% to 3%. However, we are not sure if this potentially important improvement will translate into better outcomes for the children as they grow older and reach school-age. As there are many examples of treatments given around the time of birth that have been shown to have some short-term benefits, but substantial long-term harms, we must be as certain as we can be that any advance in one small area of health is not counterbalanced by disadvantages in other health areas. We plan to assess the 1061 survivors from our earlier clinical trial of magnesium sulphate therapy at ages from 7-8 years, when they are at school. We will assess their movement and other important areas of their brain function, as well as their school progress and general health and growth. If we find important improvements in health at school-age of these children caused by magnesium sulphate therapy, without any substantial counterbalancing side-effects, magnesium sulphate will probably become standard therapy in mothers who are likely to deliver their baby very early. This will lead to a reduction in the burden of illness in the community caused by being born too early.Read moreRead less
Mechanism Of Protection Of Islet Beta Cells From T1D By Heparan Sulfate
Funder
National Health and Medical Research Council
Funding Amount
$602,453.00
Summary
Type 1 diabetes (T1D) is an autoimmune disease which destroys the insulin-producing beta cells in the pancreas. Current insulin therapy does not prevent the development of serious secondary complications. We have discovered that beta cells require a complex sugar (heparan sulfate; HS) for their survival and that T1D is prevented when an enzyme, heparanase, that degrades HS is inhibited. Understanding these mechanisms will identify new therapeutic strategies for preventing T1D progression.