Measurement of cell death

Methods in Cell Biology
D T Loo, J R Rillema

Abstract

Apoptosis, or programmed cell death, is a physiological form of cell death that plays a critical role in the development and maintenance of multicellular organisms. Apoptosis is characterized based on morphological and biochemical criteria. Morphological characteristics include cell shrinkage, cytoplasmic condensation, chromatin segregation and condensation, membrane blebbing, and the formation of membrane-bound apoptotic bodies, whereas the biochemical hallmark of apoptosis is internucleosomal DNA cleavage into oligonucleosome-length fragments. A great deal of research is aimed at defining the molecular mechanisms that play a role in apoptosis. As one of the common end points of experiments related to apoptosis is in fact the death of the cell, it has become important to develop reliable assays to measure cell death that may be compared among the various systems being investigated. This chapter reviews many of the current methods used to measure apoptotic cell death and points out strengths and weaknesses of each approach with respect to the system being examined and the questions being asked. Traditional cell-based methods, including light and electron microscopy, vital dyes, and nuclear stains, are described. Biochemical met...Continue Reading

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis