Association between direct acting agents used for chronic hepatitis C virus infection and the occurrence of acute leukaemia - A disproportionality analysis.

Background and Aims: A recent single-center study reported a significant increase in acute myeloid leukaemia (AML) cases, including mixed-phenotype acute leukaemia (MPAL), after exposure to direct acting agents (DAA). We investigated whether DAA use increased the risk of AML in patients with chronic hepatitis C virus (HCV) infection.
Methods: We conducted a disproportionality analysis of the WHO Pharmacovigilance database Vigibase up to 2020. Queries focused on all DAAs, subclasses, combinations or each DAA separately as well as interferon and ribavirin as negative controls. The primary outcome was AML. Secondary outcomes were AML without MPAL, MPAL, acute lymphoid leukemia (ALL) and acute leukemia (AL, high-level term encompassing AML, ALL, MPAL and unspecified acute leukemia [UAL]). The information component (IC0.25) and proportional reporting ratio (PRR0.25) were computed to assess a potential pharmacovigilance signal.
Results: We identified 49 notifications reporting any AL occurrence after anti-HCV treatments from June 1997 to December 2020: 23 (47%) involved a DAA, 24 (49%) interferon and 12 (24%) ribavirin. The DAAs sofosbuvir and ledipasvir were suspected in 74% (n = 17) and 39% (n = 9) of cases. The events reported were AML (n = 22), ALL (n = 11), AML and ALL (n = 1) and UAL (n = 15) and no MPAL. DAA, interferon or ribavirin were not significantly associated with AML, ALL or AL.
Conclusion: This study did not find any association between DAA exposure and the occurrence of AML. Nevertheless, vigilance should remain, particularly for MPAL, which may not have been well captured in our study because of its rareness and high risk of misclassification.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: C SCHEIFER, A DECHARTRES and B LEBRUN-VIGNES declare that they have no conflicts of interest. P LEBRAY has served as a speaker or a consultant from ASTELLAS and GILEAD and has received research funding from GILEAD. F Tubach is head of the clinical research unit of Pitié-Salpêtrière and Charles Foix hospitals and the pharmacoepidemiology center of Assistance Publique Hôpitaux de Paris, that have received research funding, grants and fees for consultant activities from a large number of pharmaceutical companies, that have contributed indiscriminately to the salaries of its employees. She is not employed by these structures and didn't receive any personal remuneration from these companies.
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