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Updated: Jan 3, 2026

Modified Annexin V/Propidium Iodide Apoptosis Assay For Accurate Assessment of Cell Death
Published on: April 24, 2011
Assessment of annexin A1 release during immunogenic cell death
Elisa Elena Baracco1, Adriana Petrazzuolo1, Guido Kroemer2
1Equipe labellisée Ligue Nationale Contre le Cancer, Université Paris Descartes, Université Sorbonne Paris Cité, Université Paris Diderot, Institut National de la Santé et de la Recherche Médicale (INSERM), UMR1138, Centre de Recherche des Cordeliers, Paris, France.
Abstract:
The protein annexin A1 (ANXA1) belongs to the danger-associated molecular patterns (DAMPs) that alert the innate immune system about tissue perturbations. In the context of immunogenic cell death (ICD), ANXA1 is released from the cytoplasm of dying cells and, once extracellular, acts on formyl peptide receptor 1 (FPR1) expressed on dendritic cells to favor long-term interactions between dying and dendritic cells. As a result, the accumulation of extracellular ANXA1 constitutes one of the hallmarks of ICD. In the past, the detection of ANXA1 was based on semiquantitative immunoblots. More recently, a commercial enzyme-linked immunosorbent assay (ELISA) has been developed to measure ANXA1 in an accurate fashion. Here, we detail the protocol to measure the concentration of ANXA1 in the supernatants of cancer cells treated with chemotherapy.
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