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Risk Factors for Infectious Adverse Events in Newly Diagnosed Acute Myeloid Leukemia Patients Treated With Venetoclax
Olgu Erkin Çınar1, Azade Kanat2, Kerim Erer1
1Department of Hematology, Kayseri City Training and Education Hospital, Kayseri, Turkey.
Background:
Venetoclax-based (ven) combinations have become a standard of care for acute myeloid leukemia (AML) patients ineligible for intensive chemotherapy. However, the associated risk of infectious adverse events (IAEs) remains a significant clinical concern.
Aims:
This study aimed to evaluate the incidence, characteristics, and risk factors for IAEs in newly diagnosed AML patients treated with venetoclax combinations in a real-world setting.
Methods And Results:
We conducted a retrospective cohort study of AML patients treated with ven in combination with hypomethylating agents or low-dose cytarabine (LDAC), with analyses performed on a treatment cycle basis. Clinical and laboratory data, including IAE characteristics, duration of neutropenia, and concomitant medications, were collected, and grade ≥ 2 IAEs were included according to CTCAE v5.0 criteria. The cohort included 143 treatment cycles of 43 patients, with a median neutropenia duration of 13 days (5-35). A total of 34 (23.8%) grade ≥ 2 IAEs occurred, with an incidence of 1 per 121 patient-days. Multivariate analysis identified prolonged neutropenia (days, OR = 1.037, p = 0.005) and interacting concomitant medications (OR = 9.99, p < 0.001) as independent risk factors for IAEs. The rate of invasive fungal infections was as low as 3.5%, and the use of antifungal or antibacterial prophylaxis was not associated with a reduction in the rate of IAEs.
Conclusion:
IAEs remain a substantial risk in venetoclax-treated AML patients, particularly during prolonged neutropenia and with concomitant drug interactions. Optimizing venetoclax regimens and careful management of interacting medications may mitigate these risks.
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