Thomas Parker




Our research focuses on the molecular regulation of cardiac-specific gene expression in cardiac hypertrophy and failure. This has involved studies of transcriptional control of gene expression in cultured cardiac muscle, analysis of the molecular response to myocardial infarction, elucidation of signal transduction pathways involved in muscle growth and gene expression, and the identification of novel molecules that regulate cardiac hypertrophy and myocyte apoptosis. We apply transgenic and gene knockout strategies in mice to study the molecular physiology of these novel molecules, with a focus on the S100 family of calcium-binding proteins. Ours was the first group to define a role for these proteins in cardiac pathophysiology and more recently, in pulmonary hypertension.

At present, I am not accepting students in my research laboratory.

Recent Publications

  1. Drosatos, IA, Tsoporis, JN, Izhar, S, Gupta, S, Tsirebolos, G, Sakadakis, E et al.. Differential Regulation of Circulating Soluble Receptor for Advanced Glycation End Products (sRAGEs) and Its Ligands S100A8/A9 Four Weeks Post an Exercise Intervention in a Cohort of Young Army Recruits. Biomolecules. 2021;11 (9):. doi: 10.3390/biom11091354. PubMed PMID:34572568 PubMed Central PMC8469473.
  2. Tsoporis, JN, Drosatos, IA, Gupta, S, Amatullah, H, Izhar, S, Dos Santos, CC et al.. Cytoprotective Mechanisms of DJ-1: Implications in Cardiac Pathophysiology. Molecules. 2021;26 (13):. doi: 10.3390/molecules26133795. PubMed PMID:34206441 PubMed Central PMC8270312.
  3. Ektesabi, AM, Mori, K, Tsoporis, JN, Vaswani, CM, Gupta, S, Walsh, C et al.. Mesenchymal Stem/Stromal Cells Increase Cardiac miR-187-3p Expression in a Polymicrobial Animal Model of Sepsis. Shock. 2021;56 (1):133-141. doi: 10.1097/SHK.0000000000001701. PubMed PMID:33378320 PubMed Central PMC8240645.
  4. Gupta, S, Tsoporis, JN, Jia, SH, Dos Santos, CC, Parker, TG, Marshall, JC et al.. Toll-Like Receptors, Associated Biochemical Signaling Networks, and S100 Ligands. Shock. 2021;56 (2):167-177. doi: 10.1097/SHK.0000000000001704. PubMed PMID:33350801 .
  5. Rigopoulos, AG, Kalogeropoulos, AS, Tsoporis, JN, Sakadakis, EA, Triantafyllis, AS, Noutsias, M et al.. Heat Shock Protein 70 Is Associated With Cardioversion Outcome and Recurrence of Symptomatic Recent Onset Atrial Fibrillation in Hypertensive Patients. J Cardiovasc Pharmacol. 2021;77 (3):360-369. doi: 10.1097/FJC.0000000000000962. PubMed PMID:33298735 .
  6. Tsoporis, JN, Hatziagelaki, E, Gupta, S, Izhar, S, Salpeas, V, Tsiavou, A et al.. Circulating Ligands of the Receptor for Advanced Glycation End Products and the Soluble Form of the Receptor Modulate Cardiovascular Cell Apoptosis in Diabetes. Molecules. 2020;25 (22):. doi: 10.3390/molecules25225235. PubMed PMID:33182705 PubMed Central PMC7696395.
  7. Tsoporis, JN, Fazio, A, Rizos, IK, Izhar, S, Proteau, G, Salpeas, V et al.. Increased right atrial appendage apoptosis is associated with differential regulation of candidate MicroRNAs 1 and 133A in patients who developed atrial fibrillation after cardiac surgery. J Mol Cell Cardiol. 2018;121 :25-32. doi: 10.1016/j.yjmcc.2018.06.005. PubMed PMID:29885959 .
  8. Gerasimou, C, Tsoporis, JN, Siafakas, N, Hatziagelaki, E, Kallergi, M, Chatziioannou, SN et al.. A Longitudinal Study of Alterations of S100B, sRAGE and Fas Ligand in Association to Olanzapine Medication in a Sample of First Episode Patients with Schizophrenia. CNS Neurol Disord Drug Targets. 2018;17 (5):383-388. doi: 10.2174/1871527317666180605120244. PubMed PMID:29875007 .
  9. Rizos, IK, Tsoporis, JN, Toumpoulis, IK, Salpeas, V, Izhar, S, Rigopoulos, AG et al.. Antiapoptotic Effect of β1 Blockers in Ascending Thoracic Aortic Smooth Muscle Cells: The Role of HSP70 Expression. J Cardiovasc Pharmacol. 2018;72 (2):86-96. doi: 10.1097/FJC.0000000000000596. PubMed PMID:29738368 .
  10. Mohammadzadeh, F, Tsoporis, JN, Izhar, S, Desjardins, JF, Parker, TG. Deficiency of S100B confers resistance to experimental diabetes in mice. Exp Cell Res. 2018;365 (1):129-137. doi: 10.1016/j.yexcr.2018.02.030. PubMed PMID:29499206 .
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Affiliations & Other Activities

  • Scientist, Li Ka Shing Knowledge Institute, St. Michael’s Hospital
  • Vice President, Programs & Chief Medical Officer, St. Michael’s Hospital