Re: Annexin V (AV) and propidium iodide (PI) staining to identify apoptotic/necrotic cells

From: Martin Kelly (M.G.Kelly@queens-belfast.ac.uk)
Date: Thu Feb 10 2000 - 12:09:52 EST


Janet,
thanks for your reply. The cells that become immediately 
necrotic - would they not also be expected to take up AV, at 
least in the earlier stages of necrosis? Or is it different in 
some way? Are the cells so necrotivc immediately, and the cell 
membranes so disrupted, that there is no AV binding?
Finally, do you have any references r.e. this from Beckman 
Coulter, as it would be nice to be able to get some more 
information on this subject. Thanks very much for your help.

						Martin Kelly


On Thu, 10 Feb 2000 09:13:05 -0500 (EST) janet e konyer 
<jkonyer@healthy.uwaterloo.ca> wrote:

> 
> HI Martin,
> 
>    I would say that An-PI+ are necrotic cells, while AN+PI+ are also
> necrotic (in an earlier stage).  As the process of necrosis occurs, the
> cells will take up both stains, while others cells will become necrotic
> immediately and only take up the PI stain.  THis is how we interpret our
> data, and it has been confirmed by Beckman Coutler (producer of the
> Annexin PI kit).  I hope this helps, pls let me know if I can be of any
> further assisstance,
> 
> Janet
> 
> 

----------------------
Martin Kelly
Department of Clinical Biochemistry, 
Institute of Clinical Science,
Grosvenor Road,
BELFAST. BT12 6BJ
Tel No: (01232) 263267



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