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The Role Of Hypoxia In The Developmental Programming Of The Kidney
Funder
National Health and Medical Research Council
Funding Amount
$651,276.00
Summary
We aim to understand how inadequate oxygen supply to the fetus during pregnancy can affect development of the kidney. Many babies do not get enough oxygen whilst developing in the womb. This can be due to a poorly formed placenta or the mother smoking. This can interfere with normal growth and formation of the kidney. Our knowledge may help babies get the best start to life.
Birth Weight, Adult Weight And Podocyte Depletion.
Funder
National Health and Medical Research Council
Funding Amount
$796,252.00
Summary
A major role of our kidneys is to filter our blood. A key cell type in our kidney filters is an octopus-shaped cell known as the podocyte. If we are not born with enough podocytes, or if the filters grow too large after birth due for example to excessive weight gain, the podocytes cannot adequately filter the blood, and this can lead to kidney disease. We will measure podocyte endowment at birth, and assess the effects of weight gain and loss after birth on podocyte features and kidney health.
Novel Therapy For Enhancing Organ Maturation In Pre-term Babies
Funder
National Health and Medical Research Council
Funding Amount
$694,323.00
Summary
This project is developing a factor to enhance organ maturation and repair that may provide a new therapy for premature babies and fetuses with birth defects. This exciting new finding allows for the development of treatments of underdeveloped organs, in particular the lungs of premature and growth restricted babies. We are also trialing this factor in unborn babies with defects to the kidneys and lungs of which there is currently no cure.
Developmental Programming: Mechanisms And Interventions
Funder
National Health and Medical Research Council
Funding Amount
$705,501.00
Summary
Disturbances during pregnancy can impact on developmental processes and result in increased risk of disease in later life. This project will examine the impact of perturbations such as maternal stress or alcohol consumption on the development of the placenta and fetal kidney. By gaining an understanding of how these organs are affected by prenatal insults, we are likely to be able to develop more effective intervention strategies to ensure all babies receive a healthy start to life.
Prenatal Placental And Postnatal Mammary Programming Of Cardiovascular And Renal Diseases
Funder
National Health and Medical Research Council
Funding Amount
$503,776.00
Summary
Being born small and the associated catch-up growth, independently predict adult hypertension. Reduced placental blood flow is a major cause of fetal growth restriction and is implicated in programming adult disease. We are the first to demonstrate that placental compromise in rats also adversely affects breast development, milk quality and supply, which further impair growth during lactation. This is followed by accelerated growth after weaning, programming more adverse outcomes. Using a rat mo ....Being born small and the associated catch-up growth, independently predict adult hypertension. Reduced placental blood flow is a major cause of fetal growth restriction and is implicated in programming adult disease. We are the first to demonstrate that placental compromise in rats also adversely affects breast development, milk quality and supply, which further impair growth during lactation. This is followed by accelerated growth after weaning, programming more adverse outcomes. Using a rat model, we will determine for the first time if restricted nutrition before birth via the placenta or after birth via lactation increases the risk of developing high blood pressue and kidney and blood vessel dysfunction. Manipulations of nutrition after birth will be achieved by cross-fostering studies. We will establish whether a reduction in the number of functioning units (nephrons) in the kidney, alterations in key genes involved in kidney development and changes in blood vessel reactivity are associated with developing hypertension. We will manipulate the renin-angiotensin system (RAS), which is important in determining kidney function, to define its role in hypertension in this model. We propose that a common lifestyle insult, such as modest elevation in dietary salt, will evoke exaggerated responses in adult offspring who were born small. These studies will identify the mechanisms by which the kidney, vasculature and RAS contribute to the programming of hypertension and the relative roles of the prenatal and postnatal environments. Defining the underlying mechanisms responsible will provide insight into early life interventions that may lessen these adverse consequences for longer-term health. Identification of critical periods after birth, rather than before, would offer a greater likelihood that practical public health interventions can be developed to improve adult health in this emerging field.Read moreRead less
Exploring The Physiological, Morphological And Molecular Bases Of Renal Developmental Programming.
Funder
National Health and Medical Research Council
Funding Amount
$422,264.00
Summary
Suboptimal fetal and neonatal development increases our risk of developing a range of diseases in adulthood. The concept that deleterious events during development can influence adult health is termed 'developmental programming'. Obtaining A Healthy Start to Life is a priority research goal of the Australian Government. The kidneys are particularly susceptible to developmental programming. This is in part because the functional units (nephrons) of the kidneys are all formed before birth in human ....Suboptimal fetal and neonatal development increases our risk of developing a range of diseases in adulthood. The concept that deleterious events during development can influence adult health is termed 'developmental programming'. Obtaining A Healthy Start to Life is a priority research goal of the Australian Government. The kidneys are particularly susceptible to developmental programming. This is in part because the functional units (nephrons) of the kidneys are all formed before birth in humans. Thus, if fetal development is suboptimal, babies are at risk of being born with a permanent nephron deficit, with functional and disease consequences. We have shown in male rats that the offspring of a maternal low protein diet have fewer nephrons and lower blood pressure than rats fed a normal diet. These rats display a striking sensitivity in adulthood to the feeding of a high salt diet. We will define the physiological and morphological bases of this sensitivity, and repeat these studies in females, as increasing evidence shows significant sex differences in developmental programming. Defining the molecular mechanisms of developmental programming is the greatest challenge for researchers in the field. We have recently completed the most comprehensive analysis to date of gene expression in the developing mouse kidney, and have shown for the first time that the mouse programmes kidney development. We will use the new techniques of genomics and bioinformatics to study the molecular mechanisms of kidney programming. This mechanistic data will provide an excellent hypothesis engine for future studies on the specific roles of these molecular pathways in developmental programming in all mammalian species.Read moreRead less
Preclinical Optimisation Of Intrauterine Transplantation Of Fetal Mesenchymal Stem Cells For Osteogenesis Imperfecta.
Funder
National Health and Medical Research Council
Funding Amount
$600,932.00
Summary
Osteogenesis imperfecta is a genetic disorder causing brittle bones and fractures. Currently there is no good treatment. Transplanting stem cells before birth should allow them to build healthy bones early in life. Despite promising effects in animals, stem cell uptake is too low to prevent all fractures and ameliorate pain and deformity. We are studying how to improve the uptake of stem cells given to the fetus and neonate, in order to develop a treatment suitable for eventual use in humans.