Pembrolizumab autoimmune related diabetes: Moving forward, keep learning
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Updated: Jun 24, 2025

Electrochemiluminescence Assays for Human Islet Autoantibodies
Published on: March 23, 2018
Jose Angel Garcia1, Diego Alcaraz2, Esther Holgado3
1Department of Medical Oncology, GenesisCare Spain-San Francisco de Asis University Hospital, Madrid 28002, Spain. jose.garcia@genesiscare.es.
Abstract:
Immune checkpoint inhibitors (and more specifically programmed cell death 1/programmed cell death ligand 1 inhibitors as Pembrolizumab) initiated a revolution in the field of melanoma and have now expanded to several tumor subtypes and in increasingly broader clinical contexts, including the adjuvant and neoadjuvant setting, with potentially curable patients and prolonged survival. The side effects related to these drugs include a wide spectrum of manifestations, with endocrinological adverse events being some of the most frequent. Pembrolizumab-induced type 1 diabetes mellitus is an infrequent but potentially serious and not clearly reversible side effect that possesses characteristic clinical features and has high morbidity and mortality, with a chronic impact on quality of life. The etiopathogenesis of this phenomenom needs to be further investigated and a collaborative effort through the involvement of oncologists and other medical specialists is necessary for the correct identification and management of patients at risk.
Insights
Immune checkpoint inhibitors like Pembrolizumab can cause type 1 diabetes, a serious side effect. Early identification and management are crucial for patients undergoing cancer immunotherapy.
Area of Science:
- Oncology
- Immunology
- Endocrinology
Background:
- Immune checkpoint inhibitors (ICIs), particularly programmed cell death 1 (PD-1)/programmed cell death ligand 1 (PD-L1) inhibitors such as Pembrolizumab, have transformed melanoma treatment and are expanding to other cancers.
- ICIs are used in various clinical settings, including adjuvant and neoadjuvant therapy for potentially curable cancers, improving patient survival.
- Endocrinological adverse events are common side effects of ICI therapy.
Discussion:
- Pembrolizumab-induced type 1 diabetes mellitus (T1DM) is a rare but severe complication of ICI therapy.
- This ICI-induced T1DM can lead to significant morbidity and mortality, with long-term impacts on quality of life.
- The exact mechanisms driving Pembrolizumab-induced T1DM require further investigation.
Key Insights:
- Pembrolizumab can induce type 1 diabetes, a serious and potentially irreversible side effect.
- This condition presents with distinct clinical features and carries a high risk of complications.
- Understanding the etiopathogenesis is vital for managing patients at risk.
Outlook:
- Further research into the mechanisms of ICI-induced T1DM is necessary.
- Multidisciplinary collaboration between oncologists and endocrinologists is essential for patient management.
- Developing strategies for early detection and intervention in patients receiving ICIs is a priority.
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