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The Nutritional Geometry Of Ageing In A Rodent Model
Funder
National Health and Medical Research Council
Funding Amount
$979,269.00
Summary
A central belief in ageing research is that eating fewer calories prolongs life, and that the source of calories (carbohydrate, fat or protein) is irrelevant. However, a critical assessment indicates that this conclusion is premature. We will use recent techniques in nutrition to define for the first time in mammals the relationship between diet and ageing in a normal and a prematurely ageing strain of mice. The project will provide a novel nutritional approach for promoting healthy ageing.
This proposal is designed to test the protein leverage hypothesis (PLH) in humans: the idea that the level of food consumption in humans, like other animals, is adjusted to maintain a target protein intake. As the prevalence of overweight and obesity increases, with its attendant health problems, the need to identify which dietary components limit rather than exacerbate energy intake is imperative. According to the PLH, the consumption of a diet low in % protein and high in % fat and carbohydrat ....This proposal is designed to test the protein leverage hypothesis (PLH) in humans: the idea that the level of food consumption in humans, like other animals, is adjusted to maintain a target protein intake. As the prevalence of overweight and obesity increases, with its attendant health problems, the need to identify which dietary components limit rather than exacerbate energy intake is imperative. According to the PLH, the consumption of a diet low in % protein and high in % fat and carbohydrate, typical of many Western countries, inevitably requires the ingestion of additional energy to maintain protein intake constant, thus driving weight gain. Conversely, the consumption of a diet that is relatively high in % protein requires the ingestion of lower levels of energy, creating the potential for weight loss. Preliminary experimental and population-level nutritional survey data support the PLH, as does the finding that protein is more satiating than other macronutrients. If, as predicted, small changes in the proportion of protein in diets described in the current study are found to impact on total energy intake there will be significant implications for weight control strategies. Thus, if the PLH is confirmed, public health dietary recommendations and government policy settings for the food industry will need to change. Large-scale intervention studies aimed at demonstrating the longer term impact on body weight will also be required.Read moreRead less
Cell Type Specific Biologic Responses To HIV Infection
Funder
National Health and Medical Research Council
Funding Amount
$636,242.00
Summary
The way in which HIV alters the internal environment of its target cells to facilitate its growth will be examined. These changes enhance its ability to gain a toehold in the human body after entering the genital tract and its persistence for life in the brain and elsewhere in the body.
The Role Of Chemokines In Establishing HIV Latency
Funder
National Health and Medical Research Council
Funding Amount
$372,049.00
Summary
Although antiviral therapy is effective in controlling HIV, therapy must be continued life-long because the virus cannot be cleared from long lived infected CD4+ T cells that are silently or latently infected. In this proposal we will explore the mechanism of how HIV can enter these resting CD4+ T-cells and establish long lived latent infection. Understanding this process may potentially lead to new strategies to cure HIV infection.
Surface Tension Of Upper Airway Lining Liquid: Role In Obstructive Sleep Apnoea Hyponoea Syndrome
Funder
National Health and Medical Research Council
Funding Amount
$494,833.00
Summary
The obstructive sleep apnoea hypopnoea syndrome (OSAHS) refers to a condition in which throat blockage occurs during sleep leading to breathing difficulties, including cessation of breathing for short periods of time. OSAHS affects both men and women but is amongst the commonest of chronic disorders of adult males, occurring in 5% of men over the age of 45 years. In the proposed studies we will examine the effect that the liquid layer that lines the throat, has on the ability of the airway to st ....The obstructive sleep apnoea hypopnoea syndrome (OSAHS) refers to a condition in which throat blockage occurs during sleep leading to breathing difficulties, including cessation of breathing for short periods of time. OSAHS affects both men and women but is amongst the commonest of chronic disorders of adult males, occurring in 5% of men over the age of 45 years. In the proposed studies we will examine the effect that the liquid layer that lines the throat, has on the ability of the airway to stay open during sleep. In particular we will examine whether coating the throat with a substance that decreases stickiness will help to prevent the occurrence of episodes of throat blockage during sleep in persons with OSAHS. We will also explore the role of saliva production and swallowing during sleep in maintaining a low stickiness of the throat and whether this liquid lining is abnormal in OSAHS patients. These studies will establish the potential usefulness of decreasing the stickiness of the liquid lining the throat as a treatment for OSAHS.Read moreRead less