McMaster University

Medical Sciences
Graduate Program

Scope of Search


Ishac Nazi

Ishac Nazy


Associate Professor

Research Interests

My research interests are in the specific interactions between antibodies and their target antigens on platelets, leading to thrombocytopenia and/or thrombosis. Heparin induced thrombocytopenia and Immune thrombocytopenia (ITP) are great models for identifying key factors involved in the pathogenesis of the immune responses leading to low platelet counts. Our research focuses on the cellular and humoral immunity and the downstream effects on platelet physiology. We use our research to identify the pathology from patient samples and create in-vitro models that could explain our findings and further our understanding of the issues at hand.

Our translational research capitalizes on technologies in the fields of immunology, biochemistry, and molecular biology to transfer basic science findings to the clinical practice for improved patient care. Our in-vitro human megakaryocytopoiesis/thrombopoiesis model serves as a benchmark for studying intrinsic and extrinsic factors that affect platelet production. The manipulation of various conditions in this in-vitro model provides avenues to study the pathologies associated with diseases such as ITP.


McMaster University
Hamilton General Site

telephone: (905) 521-2100 ext.20242


Program Area

Blood & Vasculature


Research Focus

Immune-mediated platelet disorders, Platelet activation, Immune thrombocytopenia, Platelet receptors, Immune response

Selected Publications

• Huynh, A., Arnold, D.M., Kelton, J.G., Smith, J.W., Horsewood, P., Clare, R., Guarne, A. & Nazy, I. (2019) Characterization of platelet factor 4 amino acids that bind pathogenic antibodies in heparin-induced thrombocytopenia. J Thromb Haemost, 17, 389-399.
• Nazy, I., Clare, R., Staibano, P., Warkentin, T.E., Larche, M., Moore, J.C., Smith, J.W., Whitlock, R.P., Kelton, J.G. & Arnold, D.M. (2018a) Cellular immune responses to platelet factor 4 and heparin complexes in patients with heparin-induced thrombocytopenia. J Thromb Haemost, 16, 1402-1412.
• Nazy, I. & Cuker, A. (2018) Statins for high cholesterol ... and for low platelets? Blood, 131, 1159-1161.
• Nazy, I., Kelton, J.G., Moore, J.C., Clare, R., Horsewood, P., Smith, J.W., Ivetic, N., D'Souza, V., Li, N. & Arnold, D.M. (2018b) Autoantibodies to thrombopoietin and the thrombopoietin receptor in patients with immune thrombocytopenia. Br J Haematol, 181, 234-241.
• Vrbensky, J.R., Arnold, D.M., Kelton, J.G., Smith, J.W., Jaffer, A.M., Larche, M., Clare, R., Ivetic, N. & Nazy, I. (2019a) Increased cytotoxic potential of CD8(+) T cells in immune thrombocytopenia. Br J Haematol.
• Vrbensky, J.R., Moore, J.E., Arnold, D.M., Smith, J.W., Kelton, J.G. & Nazy, I. (2019b) The sensitivity and specificity of platelet autoantibody testing in immune thrombocytopenia: a systematic review and meta-analysis of a diagnostic test. J Thromb Haemost, 17, 787-794.