The Dendritic Cell Biology & Therapeutics Group

Lab head: Professor Derek Hart
Location: ANZAC Research Institute, Concord Hospital

The Dendritic Cell Biology and Therapeutics Group at the ANZAC Research Institute is a newly established research program focused on understanding dendritic cell biology to enable the development of new ways to treat haematological diseases. The group is a translational research group with projects suitable for candidates interested in basic biology or more clinically focused work. The four main areas of focus include:

1.    DC Antigen Discovery and Antibody Engineering

 

We have identified a number of potential novel biomarkers expressed by dendritic cells. An interested student would design and generate reagents to follow the expression of these biomarkers to discover how they may contribute to dendritic cell function.

Part of our core business is generating antibodies that can be developed for the purpose of using dendritic cells for the diagnosis and treatment of haematological diseases. In this project a student would gain the skills in antibody engineering and phage display. These techniques will be used to develop humanised antibodies and identify novel proteins that bind dendritic cells.

2.    Dendritic Cell Biology – Fundamental and Applied

 

CD300 is a family of immune-regulatory proteins that can positively and negatively regulate dendritic cell signalling. This project would allow a student to investigate the contribution of CD300 molecules in haematological diseases.

CD302 is a DC specific molecule that plays a role in the migration of dendritic cells. A student would be involved in characterising a gene knockout model of CD302 and the effects on dendritic cells.

AHCYL-1 is another DC molecule that we have found be important in Ca2+ signalling in dendritic cells. Like the CD302 project, a student would be involved in characterising a gene knockout model.

3.     Immunostimulation/Cancer Vaccination

 

We are developing and optimising strategies the purification and clinical use of dendritic cells to enhance immunotherapy treatment options for patients with multiple myeloma, acute myeloid leukemia and prostate cancer. The strategies being developed have the potential to be generic eventually allowing some overlap with other disease treatments.

Potential students would participate in the development of therapeutic dendritic cell vaccinations strategies and apply these to preclinical animal models of haematological malignancies. Students would gain experience in several molecular techniques including real time PCR, cloning, in vitro-transcription of mRNA tumour antigens. Additionally the student will be exposed to a variety of cellular immunological techniques including cytokine analysis, generation of tumour specific cytotoxic T cells as well as gain experience in cell isolations strategies using flow cytometry.

4.     Immunosuppression/Anti-inflammatory

Our program is ultimately focused on developing novel therapies for haematological disease such as multiple myeloma and acute myeloid leukemia and understanding the balance between graft versus leukemia (GVL) and graft versus host disease (GVH) in Bone Marrow Transplantation. We have a number of projects investigating the role of dendritic cells in these conditions using patient samples. 

In particular, we are developing therapeutic antibodies that can be used to deplete activated dendritic cells causing GVHD whilst retaining the dendritic cells required for GVL. Students would gain experience in flow cytometry, cellular assays and animal models and work closely with clinicians actively involved in treating these conditions. There is an opportunity to work as a student on aspects of our novel anti-CD83 therapeutic project.

Website: http://www.anzac.edu.au/index.php?section=1
Lab members: Professor Derek Hart Professor Ken Bradstock, Westmead Hospital A/Prof Georgina Clark Dr Nirupama Verma Dr Xinsheng Ju Dr Kifah Shahin, Westmead Hospital Dr Phillip Fromm, Royal Prince Alfred Hospital Dr Pablo Silveira Dr Robin Gasiorowski Dr Christian Bryant Zamil Mattar Fiona Kupresanin Ai Vu Leticia Muusers Dr Sebastien Anguille Amanda Afyouni, Executive Assistant James Zagarella, Business Manager
Publications:

Wilkinson, R., Woods, K., D'Rozario, R., Prue, R., Vari, F., Hardy, M., Dong, Y., Clements, J., Hart, D., Radford, K. (2012), Human kallikrein 4 signal peptide induces cytotoxic T cell responses in healthy donors and prostate cancer patients. Cancer Immunology, Immunotherapy. 61(2), 169-179

Freeman, L., Lam, A., Petcu, E., Smith, R., Salajegheh, A., Diamond, P., Zannettino, A., Evdokiou, A., Luff, J., Wong, P., Khalil, D., Waterhouse, N., Vari, F., Rice, A., Catley, L., Hart, D., Vuckovic, S. (2011), Myeloma-induced alloreactive T cells arising in myeloma-infiltrated bones include double-positive CD8+CD4+ T cells: evidence from myeloma-bearing mouse model. Journal of Immunology. 187(8), 3987-3996.


Fromm, P., Gottlieb, D., Bradstock, K., Hart, D. (2011), Cellular therapy to treat haematological and other malignancies: progress and pitfalls. Pathology. 43(6), 605-15.

Hart, D. (2011), The delivery of effective therapeutic cancer vaccination. Asian Journal of Andrology. 13(2), 183-184.


Dean, M., Flower, R., Eisen, D., Minchinton, R., Hart, D., Vuckovic, S. (2011), Mannose-binding lectin deficiency influences innate and antigen-presenting functions of blood myeloid dendritic cells. Immunology. 132(2), 296-305.

Ding, Y., Ju, X., Azlan, M., Hart, D., Clark, G. (2011), Screening of the HLDA9 panel on peripheral blood dendritic cell populations. Immunology Letters. 134(2), 161-166.

Christensen, M., Turner, B., Sinfield, L., Kollar, K., Cullup, H., Waterhouse, N., Hart, D., Atkinson, K., Rice, A. (2010), Mesenchymal stromal cells transiently alter the inflammatory milieu post-transplant to delay graft-versus-host disease. Haematologica. 95(12), 2102-2110.


Ziegler-Heitbrock, L., Ancuta, P., Crowe, S., Dalod, M., Grau, V., Hart, D., Leenen, P., Liu, Y., MacPherson, G., Randolph, G., Scherberich, J., Schmitz, J., Shortman, K., Sozzani, S., Strobl, H., Zembala, M., Austyn, J., Lutz, M. (2010), Nomenclature of monocytes and dendritic cells in blood. Blood. 116(16), e74-e80.


Gowans, E., Roberts, S., Jones, K., Dinatale, I., Latour, P., Chua, B., Eriksson, E., Chin, R., Li, S., Wall, D., Sparrow, R., Moloney, J., Loudovaris, M., Ffrench, R., Prince, H., Hart, D., Zeng, W., Torresi, J., Brown, L., Jackson, D. (2010), A phase I clinical trial of dendritic cell immunotherapy in HCV-infected individuals. Journal of Hepatology. 53(4), 599-607.


Jongbloed, S., Kassianos, A., McDonald, K., Clark, G., Ju, X., Angel, C., Chen, C., Dunbar, P., Wadley, R., Jeet, V., Vulink, A., Hart, D., Radford, K. (2010), Human CD141+ (BDCA-3)+ dendritic cells (DCs) represent a unique myeloid DC subset that cross-presents necrotic cell antigens. Journal of Experimental Medicine. 207(6), 1247-1260.


Jones, M., Seldon, T., Smede, M., Linville, A., Chin, D., Barnard, R., Mahler, S., Munster, D., Hart, D., Gray, P., Munro, T. (2010), A method for rapid, ligation-independent reformatting of recombinant monoclonal antibodies. Journal of Immunological Methods. 354(1-2), 85-90.

Kassianos, A., Jongbloed, S., Hart, D., Radford, K. (2010), Isolation of human blood DC subtypes. Methods in Molecular Biology. 595, 45-54.


Ju, X., Clark, G., Hart, D. (2010), Review of human DC subtypes. Methods in Molecular Biology. 595, 3-20.
 


Examining the role of the novel C-type lectin receptor DCL-1 (CD302) in innate and adaptive immune responses.

Primary supervisor: Derek Hart

The Dendritic Cell Biology and Therapeutics Group at the ANZAC Research Institute has forged a strong reputation in fundamental human dendritic cell research. Using its extensive clinical links and commercial collaborations, it is developing diagnostic and therapeutic antibodies for novel targets with application in clinical transplantation and the treatment of haematological and other malignancies.

The C-type lectin receptor family of molecules play important roles in the immune system through their ability to recognise conserved structures on foreign pathogens and altered structures on damaged cells1. Our group has identified a new member of this family, named DEC205 associated C-type Lectin-1 (DCL-1) or CD3022,3. The ligand recognised by DCL-1 is yet to be discovered and may or may not be pathogen derived. Nonetheless, our initial studies in humans have shown that DCL-1 is highly expressed on dendritic cells, monocytes, macrophages and granulocytes, pointing to a significant role within the immune system2. In preliminary work, the molecule appears to be multi-functional, with some capacity as an antigen-uptake receptor, but it may also play a role in cell adhesion and migration. Furthermore, DCL-1 is also likely to mediate additional functions due to its unusual capacity to form a fusion protein with the extracellular region of another C-type lectin receptor protein, DEC2053,4. Thus we see DCL-1 as an attractive target for potential therapeutic manipulation of immune responses.

To investigate the biology of DCL-1 in vivo, we have generated DCL-1-deficient (knock-out (KO)) mice. The honours project will involve investigating the role of DCL-1 in haematopoiesis, leukocyte trafficking and innate and adaptive immune responses by performing comparisons of DCL-1 KO and control wild type (WT) mice. The student will learn several laboratory skills including flow cytometry, real-time PCR, cell culture, isolation of lymphoid populations through magnetic- and fluorescence-activated cell sorting and various techniques involved in using mice as a model for studying immune function. As we are a strong translational laboratory, there are also options to collaborate on investigating DCL-1 biology in humans.

References:

1.      Geijtenbeek, T. B., and S. I. Gringhuis. 2009. Signalling through C-type lectin receptors: shaping immune responses. Nat Rev Immunol 9:465-479.

2.      Kato, M., S. Khan, E. d'Aniello, K. J. McDonald, and D. N. Hart. 2007. The novel endocytic and phagocytic C-Type lectin receptor DCL-1/CD302 on macrophages is colocalized with F-actin, suggesting a role in cell adhesion and migration. J Immunol 179:6052-6063.

3.      Kato, M., S. Khan, N. Gonzalez, B. P. O'Neill, K. J. McDonald, B. J. Cooper, N. Z. Angel, and D. N. Hart. 2003. Hodgkin's lymphoma cell lines express a fusion protein encoded by intergenically spliced mRNA for the multilectin receptor DEC-205 (CD205) and a novel C-type lectin receptor DCL-1. J Biol Chem 278:34035-34041.

4.      Butler, M., A. S. Morel, W. J. Jordan, E. Eren, S. Hue, R. E. Shrimpton, and M. A. Ritter. 2007. Altered expression and endocytic function of CD205 in human dendritic cells, and detection of a CD205-DCL-1 fusion protein upon dendritic cell maturation. Immunology 120:362-371.


Discipline: Infectious diseases and Immunology
Co-supervisors: Pablo Silveira, Georgina Clark
Keywords: mouse models, Immune response, Dendritic cells
Contact: Email Derek Hart