Does propidium iodide detect apoptosis?
Since its introduction, the propidium iodide (PI) flow cytometric assay has been widely used for the evaluation of apoptosis in different experimental models.
How does annexin V PI work?
The Annexin V corresponding signal provides a very sensitive method for detecting cellular apoptosis, while propidium iodide (PI) is used to detect necrotic or late apoptotic cells, characterized by the loss of the integrity of the plasma and nuclear membranes.
What happens to phosphatidylserine during apoptosis?
The exposure of phosphatidylserine (PS) on the outer plasma membrane has long been considered a unique feature of apoptotic cells. Together with other “eat me” signals, it enables the recognition and phagocytosis of dying cells (efferocytosis), helping to explain the immunologically-silent nature of apoptosis.
What does apoptosis mean in biology?
A type of cell death in which a series of molecular steps in a cell lead to its death. This is one method the body uses to get rid of unneeded or abnormal cells. The process of apoptosis may be blocked in cancer cells. Also called programmed cell death.
What is annexin V stain?
Annexin V staining is a common method for detecting apoptotic cells. Thermo Fisher Scientific offers high-quality fluorescent annexin V conjugates as standalone reagents and in a variety of kits for use in flow cytometry and for imaging suspension cells.
What is the role of propidium iodide in the study of apoptosis?
Studies of cellular apoptosis have been significantly impacted since the introduction of flow cytometry-based methods. Propidium iodide (PI) is widely used in conjunction with Annexin V to determine if cells are viable, apoptotic, or necrotic through differences in plasma membrane integrity and permeability 1,2.
What is propidium iodide flow cytometry used for?
Since its introduction, the propidium iodide (PI) flow cytometric assay has been widely used for the evaluation of apoptosis in different experimental models. It is based on the principle that apoptotic cells, among other typical features, are characterized by DNA fragmentation and, consequently, loss of nuclear DNA content.
Can propidium iodide flow cytometry evaluate apoptosis in B-cell lymphoma?
In this protocol, we describe a propidium iodide (PI) flow cytometry assay to evaluate B-cell lymphomas that have undergone apoptosis in vivo. B-cell lymphoma cells are injected into recipient mice and, on tumor formation, the mice are treated with the apoptosis inducer vorinostat (a histone deacetylase inhibitor).
Is the Pi flow cytometric assay for apoptosis reproducible?
However, when used appropriately, the PI flow cytometric assay is a rapid and easily reproducible method that can be adapted for apoptosis evaluation in different kinds of cells. RNase (DNase free; boil RNase for 10 min if it is not DNase free)