Identifying The Ontogeny And Fate Of T Follicular Helper Cells By Two-photon Photoconversion
Funder
National Health and Medical Research Council
Funding Amount
$623,070.00
Summary
The aim of this proposal is to investigate immune cells called T follicular helper cells using a novel microscopy-based method that we have developed. This method lets us ‘tag’ these cells in a way that enables us to distinguish them from all other cells and follow them as they migrate to different immunological compartments during the response. T follicular helper cells are important for protective immune responses against pathogens and a better understanding of this T cell subset will aid vacc ....The aim of this proposal is to investigate immune cells called T follicular helper cells using a novel microscopy-based method that we have developed. This method lets us ‘tag’ these cells in a way that enables us to distinguish them from all other cells and follow them as they migrate to different immunological compartments during the response. T follicular helper cells are important for protective immune responses against pathogens and a better understanding of this T cell subset will aid vaccine design.Read moreRead less
NKT cells are a type of lymphocyte with the ability to prevent a broad range of diseases including cancer, autoimmunity, infection and graft rejection. Sometimes, NKT cells also cause diseases, including allergy and atherosclerosis. This project will investigate how NKT cells become activated in these diseases by studying their surface receptors and what these receptors interact with.
Molecular And Cellular Control Of Human Th9 Cell Differentiation In Health And Disease
Funder
National Health and Medical Research Council
Funding Amount
$550,888.00
Summary
T helper 9 (Th9) cells are a recently defined population of CD4+ T cells that have been implicated in immunological disorders ranging from allergy, asthma, inflammatory bowel disease, and cancer, to host defence against fungal and parasitic infections. As such, Th9 cells are extremely important to human health and disease. This project aims to define the mechanisms involved in the generation, regulation and function of human Th9 cells.
Defining The Role Of Innate T Cells In The Onset And Progression Of Chronic Periodontitis
Funder
National Health and Medical Research Council
Funding Amount
$581,978.00
Summary
Particular immune cell populations (innate T cells), have a critical role in immunity. These cells are stimulated by bacterial cell wall components and are one of the first cells to appear after infection. We have shown that these innate T cells are stimulated by oral bacteria that cause the disease chronic periodontitis. This project will investigate how these innate T cells affect bacterial induced periodontitis and what role they play in disease outcomes.
Interleukin Signalling In CD4+ T Cell Differentiation
Funder
National Health and Medical Research Council
Funding Amount
$663,919.00
Summary
Our bodies rely on the production of antibodies to fight infection. The cytokine IL-21 is produced by immune cells called T follicular helper (Tfh) cells that help B cells make antibodies. Tfh cells, in turn, are controlled by regulatory (Tfr) cells. Our findings demonstrate that IL-21 supports Tfh cells and limits Tfr cells, thus favoring antibody production and long term immunity. Using genomic and cellular approaches, the mechanism(s) underlying these observations will be explored.
The Mechanisms Of SIV Entry Of Follicular Helper T Cells
Funder
National Health and Medical Research Council
Funding Amount
$95,313.00
Summary
Follicular helper T (Tfh) cells are a type of immune cells essential in antibody production. Preliminary data shows that SIV infects macaque Tfh cells. In this project, we will investigate the mechanisms by which SIV enters into Tfh cells, and test the susceptibility of human Tfh cells to HIV-1 infection ex vivo. This project will enable understanding of the fate of Tfh in HIV infection and its role in HIV host defense and it may facilitate the design of vaccine against HIV.
Memory CD4 T Cells That Harbour The Reservoir Of Latent HIV Infection: Their Antigen Specificity, Function And Frequency Of Antigen-driven Reactivation
Funder
National Health and Medical Research Council
Funding Amount
$453,782.00
Summary
Current antiretroviral therapy for HIV successfully suppresses virus production, but does not completely eliminate the virus from the body. This project will provide essential information on memory CD4 T cells that retain HIV in a latent DNA form. Memory CD4 T cells can be very long-lived, and these latently infected memory cells can give rise to virus during treatment interruption. We will use a novel method to identify which memory CD4 T cells contain latent HIV DNA.
Investigating The Role Of TGF-beta In Resident Memory T Cell Induction And Maintenance
Funder
National Health and Medical Research Council
Funding Amount
$92,495.00
Summary
I am a research scientist interested in the immune system. Specifically, I intend to investigate immunological memory, which is the basis of vaccination. This refers to the ability of certain immune cells such as T and B cells to ‘remember’ a pathogen, so that a rapid and enhanced response can be generated upon re-infection with the same pathogen. This can be investigated by experimental techniques such as flow cytometry, histology and confocal microscopy on cells from infected mouse tissue.
The Role Of NF-?B Transcription Factor RelA In Regulatory T Cell Homeostasis And Function
Funder
National Health and Medical Research Council
Funding Amount
$637,114.00
Summary
Treg cells constitute an immune regulatory cell population that is essential for the prevention of fatal autoimmunity; however, they also limit immunity against cancer. We have discovered that the factor RelA is of critical importance for Treg development and function. We now aim to illuminate the functions of RelA in detail. Understanding the molecules that impact on Treg cell biology is critical to harness their potential for clinical intervention such as treatment of autoimmunity and cancer.
CCR9 Expressing T Helper Cells In Immunity And Autoimmunity
Funder
National Health and Medical Research Council
Funding Amount
$729,571.00
Summary
We have identified a unique subset of immune cells in autoimmune lesions named Tccr9 cells. You find these cells in the gut, but when the body shifts into disease mode, Tccr9 cells disseminate to the accessory organs of the digestive system. Understanding the relationship between gut Tccr9 cells and the Tccr9 cells that contribute to chronic inflammation and autoimmunity is the focus of this research proposal.