What is apoptosis?

 

Apoptosis is a form of programmed cell death involving a serial of biochemical cascades including such proteins as Bcl-2, Bax, Apaf-1 or apoptotic protease activating factor-1, caspases such as caspase-9, caspase-3, and caspase-7, as well as proteins involved in digestion of proteins, degradation of DNA, and phagocytosis. Apoptosis is a normal cellular process and is essential for the proper development and maintenance of the tissues and organs. Apoptosis is also necessary for the destruction of cells considered a threat such as cells infected with viruses, cells with DNA damage, mutated cells, cancerous cells, and cells of the immune system after they have fulfilled their function. The decision of a cell to undergo apoptosis depends upon the balance between positive signals keeping the cell alive (eg, growth factors and interleukins such as IL-2) and negative signals that call for cellular suicide (eg,oxidative stress, DNA damage, improper protein folding, and specific molecules such as tumor necrosis factor alpha and beta (TNF-alpha and TNF-beta), and the FAS ligand (FasL) that binds to the Fas receptor, or CD95).

Apoptosis (from Pomega)

 

Apoptosis vs. Necrosis 1.

 

Apoptosis vs. Necrosis 2.

 

Apoptosis vs. Necrosis 3.

 

Cell Death: Apoptosis and Necrosis

 

 

Protocols for Apoptosis

 

DNA Laddering:

 

1. Apoptosis assay using DNA laddering.

 

2. Apoptosis assay using DNA laddering

 

3. Genome DNA Apoptosis Assay

 

4. An integrative procedure for apoptosis identification and measurement

 

TUNEL

 

1. TUNEL for paraffin embedded sections

 

2. TUNEL Protocol

 

3. TUNEL Protocol Using TACS TdT Reagents

 

DAPI staining of cells

1. DAPI staining

 

Apoptosis Assay by Annexin V Binding

 

1. Protocol ofApoptosis Assay by Annexin V Binding

 

 

Other Online Protocols for Apoptosis Assay (1) (2)

 

 

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Protocols / Cellular Biology

General cell culture protocols

Chromosome karyotype
Proliferation assays (MTT, BrdU, 3H-Thymidine incoporation)
Cell cycle assay 
Migration assay
Stem cell & related protocols 
Apoptosis and related protocols 
Soft Agar Assay for Colony Formation
Aorta ring assay
GFP transfection 
Blood cell fractionation (white blood cell isolation) 
Endothelial isolation and culture protocols
Isolation and culture human brain microvessel endothelial cells
Gene transfection
Transformation protocols
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