John Marshall




Dr. John Marshall is a Professor of Surgery at the University of Toronto, and an Intensivist at St. Michael’s Hospital in Toronto, Canada.  His academic interests are sepsis, trauma, and the innate immune response.  His laboratory studies the cellular mechanisms that prolong neutrophil survival in critical illness by preventing neutrophil programmed cell death, or apoptosis.  Professor Marshall has an active clinical research interest in sepsis and Intensive Care Unit-acquired infection, and in the design of clinical trials and outcome measures.  He has published 440 manuscripts, and 85 book chapters, and is the editor of 2 books.  He is the founding chair of the International Forum of Acute Care Trialists (InFACT) – a global network of investigator-led critical care clinical research groups, and past Secretary-General of the World Federation of Societies of Intensive and Critical Care Medicine.  He co-chairs the WHO R&D Working Group on the Clinical Characterization and Management of COVID-19.  He is past-chair of the International Sepsis Forum, past-President of the Surgical Infection Society, and past-chair of the Canadian Critical Care Trials Group.  He has given invited lectures at more than 540 meetings around the world, and is an Associate Editor of the journals Critical Care Medicine and Critical care.”

Recent Publications

  1. Vincent, JL, van der Poll, T, Marshall, JC. The End of "One Size Fits All" Sepsis Therapies: Toward an Individualized Approach. Biomedicines. 2022;10 (9):. doi: 10.3390/biomedicines10092260. PubMed PMID:36140361 PubMed Central PMC9496597.
  2. Reyes, LF, Murthy, S, Garcia-Gallo, E, Merson, L, Ibáñez-Prada, ED, Rello, J et al.. Respiratory support in patients with severe COVID-19 in the International Severe Acute Respiratory and Emerging Infection (ISARIC) COVID-19 study: a prospective, multinational, observational study. Crit Care. 2022;26 (1):276. doi: 10.1186/s13054-022-04155-1. PubMed PMID:36100904 PubMed Central PMC9469080.
  3. Mauro, AN, Turgeon, PJ, Gupta, S, Brand-Arzamendi, K, Chen, H, Malone, JH et al.. Automated in vivo compound screening with zebrafish and the discovery and validation of PD 81,723 as a novel angiogenesis inhibitor. Sci Rep. 2022;12 (1):14537. doi: 10.1038/s41598-022-18230-8. PubMed PMID:36008455 PubMed Central PMC9411172.
  4. Chen, ZZ, Bowden, P, Dufresne, J, Miao, M, Marshall, JG. LEDGF is a new growth factor in fetal serum. Anal Biochem. 2022;655 :114845. doi: 10.1016/j.ab.2022.114845. PubMed PMID:35970411 .
  5. Leibovitzh, H, Lee, SH, Xue, M, Raygoza Garay, JA, Hernandez-Rocha, C, Madsen, KL et al.. Altered Gut Microbiome Composition and Function Are Associated With Gut Barrier Dysfunction in Healthy Relatives of Patients With Crohn's Disease. Gastroenterology. 2022; :. doi: 10.1053/j.gastro.2022.07.004. PubMed PMID:35850197 .
  6. Godolphin, PJ, Fisher, DJ, Berry, LR, Derde, LPG, Diaz, JV, Gordon, AC et al.. Association between tocilizumab, sarilumab and all-cause mortality at 28 days in hospitalised patients with COVID-19: A network meta-analysis. PLoS One. 2022;17 (7):e0270668. doi: 10.1371/journal.pone.0270668. PubMed PMID:35802687 PubMed Central PMC9269978.
  7. Takaoka, A, Zytaruk, N, Davis, M, Matte, A, Johnstone, J, Lauzier, F et al.. Monitoring and auditing protocol adherence, data integrity and ethical conduct of a randomized clinical trial: A case study. J Crit Care. 2022;71 :154094. doi: 10.1016/j.jcrc.2022.154094. PubMed PMID:35724443 .
  8. Maslove, DM, Tang, B, Shankar-Hari, M, Lawler, PR, Angus, DC, Baillie, JK et al.. Redefining critical illness. Nat Med. 2022;28 (6):1141-1148. doi: 10.1038/s41591-022-01843-x. PubMed PMID:35715504 .
  9. Casey, JD, Beskow, LM, Brown, J, Brown, SM, Gayat, É, Ng Gong, M et al.. Use of pragmatic and explanatory trial designs in acute care research: lessons from COVID-19. Lancet Respir Med. 2022;10 (7):700-714. doi: 10.1016/S2213-2600(22)00044-3. PubMed PMID:35709825 PubMed Central PMC9191864.
  10. McIntyre, LA, Marshall, JC. Intravenous Fluids in Septic Shock - More or Less?. N Engl J Med. 2022;386 (26):2518-2519. doi: 10.1056/NEJMe2206160. PubMed PMID:35709013 .
Search PubMed

Affiliations & Other Activities

  • Scientist, Keenan Research Centre for Biomedical Science
  • Trauma Surgeon and Intensivist, St. Michael’s Hospital
  • Professor, Department of Surgery, University of Toronto