Abstract
Purpose
Phosphoinositide 3-kinase (PI3K) inhibition is used for the treatment of certain cancers, but can cause profound hyperglycemia and insulin resistance, for which sodium-glucose cotransporter-2 (SGLT2) inhibitors have been proposed as a preferred therapy. The objective of this research is to assess the effectiveness and safety of SGLT2 inhibitors for hyperglycemia in PI3K inhibition.
Methods
We conducted a single-center retrospective review of adults initiating the PI3K inhibitor alpelisib. Exposure to different antidiabetic drugs and adverse events including diabetic ketoacidosis (DKA) were assessed through chart review. Plasma and point-of-care blood glucoses were extracted from the electronic medical record. Change in serum glucose and the rate of DKA on SGLT2 inhibitor versus other antidiabetic drugs were examined as co-primary outcomes.
Results
We identified 103 patients meeting eligibility criteria with median follow-up of 92 days after starting alpelisib. When SGLT2 inhibitors were used to treat hyperglycemia, they were associated with a decrease in mean random glucose by -46 mg/dL (95% CI − 77 to − 15) in adjusted linear modeling. Five cases of DKA were identified, two occurring in patients on alpelisib plus SGLT2 inhibitor. Estimated incidence of DKA was: alpelisib plus SGLT2 inhibitor, 48 DKA cases per 100 patient-years (95% CI 6, 171); alpelisib with non-SGLT2 inhibitor antidiabetic drugs, 15 (95% CI 2, 53); alpelisib only, 4 (95% CI 0.1, 22).
Conclusions
SGLT2 inhibitors are effective treatments for hyperglycemia in the setting of PI3K inhibition.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
Editorial assistance at Memorial Sloan Kettering Cancer Center was provided by Katharine Olla Inoue, MA, and Clare Wilhelm, PhD.
Funding
This work has been supported in part by the Memorial Sloan Kettering Cancer Center Support Grant/Core Grant (P30 CA008748) from the National Cancer Institute of the National Institutes of Health. Division of Cancer Epidemiology and Genetics, National Cancer Institute, P30 CA008748
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MAW, DLRD, MDG, and JHF were involved in the conception, design, and conduct of the study and the analysis and interpretation of the results. JHF wrote the first draft of the manuscript, and all authors edited, reviewed, and approved the final version of the manuscript. JF is the guarantor of this work and, as such, had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
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M.A.W.: None to report. D.L., R.D.: None to report. M.D.G.: Received consulting fees from Novartis, Pfizer, and Scorpion Therapeutics; he is an inventor on a patent (pending) for Combination Therapy for PI3K-associated Disease or Disorder; and he is a co-founder, shareholder, and consultant of Faeth Therapeutics. J.F.: Hagens Berman Sobol Shapiro LLP (provision of services). J.H.F: None to report.
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Weintraub, M.A., Liu, D., DeMatteo, R. et al. Sodium-glucose cotransporter-2 inhibitors for hypergycemia in phosphoinositide 3-kinase pathway inhibition. Breast Cancer Res Treat 203, 85–93 (2024). https://doi.org/10.1007/s10549-023-07110-y
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DOI: https://doi.org/10.1007/s10549-023-07110-y