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[Drug trials in humans. Risks in the light of the London catastrophe]
1Zentrum Klinische Studien, Universitätsklinikum Freiburg, Elsässer Strasse 2, 79110 Freiburg, Germany. andreas.otte@uniklinik-freiburg.de
Abstract:
London's first-in-man drug trial with the monoclonal anti-CD28 antibody TGN1412 used for the treatment of oncological and autoimmune diseases resulted in a disaster with life-threatening adverse events in the volunteers triggered by an unexpected cytokine storm. Potential mistakes and consequences from this trial are highlighted in the general context of drug development and its risks. Risks in drug testing are not only found for high risk substances, such as TGN1412, or in the critical first-in-man phase, but can sometimes be detected only in later phases of the clinical testing, such as the phase 3 submission studies, or even after market authorization, as for example was the case in the cyclooxygenase-2-inhibitor rofecoxib (Vioxx) used for the treatment of rheumatic diseases and acute pain. Regulatory requirements to minimize risks in drug trials, however, have improved substantially over the last decades. Moreover, in light of the London incident these are being continuously modified with great diligence.
Insights
The TGN1412 drug trial caused severe adverse events due to a cytokine storm. This highlights the inherent risks in drug development, even in later phases, emphasizing the need for stringent regulatory oversight.
Area of Science:
- Drug development
- Clinical trials
- Immunology
Background:
- The first-in-man trial of TGN1412, an anti-CD28 monoclonal antibody, led to severe adverse events.
- These events were caused by an unexpected cytokine storm, a critical risk in drug testing.
Purpose of the Study:
- To analyze potential mistakes and consequences in the TGN1412 trial.
- To discuss broader risks in drug development and clinical testing.
- To examine the evolution of regulatory requirements for drug trials.
Main Methods:
- Review of the TGN1412 trial incident.
- Analysis of drug development risks across different clinical phases.
- Examination of historical drug safety cases (e.g., Vioxx).
Main Results:
- The TGN1412 trial demonstrated severe risks associated with first-in-man studies.
- Drug development risks can manifest in later phases or post-market.
- Regulatory requirements have improved but require continuous adaptation.
Conclusions:
- Drug development, especially with novel immunotherapies like TGN1412, carries significant risks.
- Vigilance and robust regulatory frameworks are essential throughout the drug lifecycle.
- Lessons learned from incidents like TGN1412 drive improvements in patient safety and trial design.
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