Novel Strategies For The Early Identification Provention And Treatment Of The Microvascular Complications Of Diabetes
Funder
National Health and Medical Research Council
Funding Amount
$4,715,000.00
Summary
Despite recent advances, approximately one third of subjects with type 1 diabetes develop kidney disease and similar proportion develop vision-threatening eye disease. Indeed, in many instances eye and kidney disease occur in the same individual. The central aim of this proposed Special Program is the exploration of mechanisms that lead to the development and progression of these devastating complications of type 1 diabetes with a particular focus on novel strategies, directly applicable to man, ....Despite recent advances, approximately one third of subjects with type 1 diabetes develop kidney disease and similar proportion develop vision-threatening eye disease. Indeed, in many instances eye and kidney disease occur in the same individual. The central aim of this proposed Special Program is the exploration of mechanisms that lead to the development and progression of these devastating complications of type 1 diabetes with a particular focus on novel strategies, directly applicable to man, for their prevention and treatment. Participants in Special Program include both established diabetes researchers and investigators from other areas of academia (blood vessel biology and applied genetics). Strong interrelationships between the various investigators and their departments already exist and will be further consolidated with continued collaboration, sharing a combination of models, novel interventions and complex genetic techniques that would not be possible outside of a large collaborative framework. In addition to academic collaboration, interactions with industry-based drug discovery programs is also an important component in developing new treatment strategies for diabetic kidney and eye disease. The Special Program will thus consist of a range of studies of direct relevance to diabetic kidney and diabetic eye disease in humans. It is expected that these studies will lead to new strategies for the prevention, treatment and even the reversal of long term complications of diabetes.Read moreRead less
Approaches to combat AIDS and its causative agent, the human immunodeficiency virus HIV-1, have thus far proved ineffective. The proposed research program intends to investigate the nuclear import of two HIV-1 proteins which have central roles in HIV infection. We will apply our expertise in the area of the regulation of nuclear import of viral proteins, and build on our observations with respect to these proteins to attempt to establish the mechanistic basis of their nuclear import, and how thi ....Approaches to combat AIDS and its causative agent, the human immunodeficiency virus HIV-1, have thus far proved ineffective. The proposed research program intends to investigate the nuclear import of two HIV-1 proteins which have central roles in HIV infection. We will apply our expertise in the area of the regulation of nuclear import of viral proteins, and build on our observations with respect to these proteins to attempt to establish the mechanistic basis of their nuclear import, and how this differs from the conventional nuclear import pathways used by normal cellular proteins. We already have evidence that nuclear import of HIV-Tat is regulated in novel fashion by cellular factors, and intend, through determining its mechanistic basis, to be able to form the basis of a strategy to block this import pathway specifically, and thereby inhibit HIV replication. This may form the basis in the future of a new pharmaceutical approach to combat HIV-AIDS.Read moreRead less
HIV infection of CD4+ lymphocytes leads to a high rate of reproduction of new virus. However, in the brain, HIV infection of the astrocytes does not yield high levels of new virus. HIV is genetically active in these astrocytes, producing high levels of the messenger molecules, the so-called mRNA, that code for the proteins required for a new virus particle. We have determined that these HIV mRNAs are specifically prevented from translating into protein. The mechanisms controlling protein transla ....HIV infection of CD4+ lymphocytes leads to a high rate of reproduction of new virus. However, in the brain, HIV infection of the astrocytes does not yield high levels of new virus. HIV is genetically active in these astrocytes, producing high levels of the messenger molecules, the so-called mRNA, that code for the proteins required for a new virus particle. We have determined that these HIV mRNAs are specifically prevented from translating into protein. The mechanisms controlling protein translation from RNA are relatively poorly understood compared with the other control points of cellular gene expression, such as the synthesis of mRNA. This project examines how astrocytes rapidly detect the presence of HIV mRNA and alter their translation machinery to halt the expression of HIV protein. This host defence mechanism involves two key components; the cellular component that identifies and responds to the viral mRNA, and the structural features of the HIV mRNA that enable the cell to detect its viral origin. We will study how translation of HIV proteins requires both HIV and cellular factors. We will determine the impact of both viral RNA elements and viral RNA binding proteins on the translation of viral and cellular proteins. The contribution of the type-1 interferons that are produced in response to viral infection will be studied for their role in augmenting the inhibition of HIV protein translation. Since HIV infected astrocytes significantly contribute to the onset of AIDS dementia, we will sees a strategy to lock HIV into a dormant state in the brain and thereby prevent the neurodegenerative disease associated with HIV. We will use the anti-viral mechanism blocking HIV protein translation in astrocytes to protect other cell populations, such as the CD4+ lymphocytes, from HIV infection. These studies will also give insights into the general mechanisms for translational control of gene expression in human cells.Read moreRead less