Apoptosis assays

From: Len Brown (lbrown@mmri.mater.org.au)
Date: Sun Jul 23 2000 - 05:16:40 EST


Dear Flow-ers

A couple of points for discussion.


What is the consensus as to "wash" or "not-to-wash" human blood cells after
Annexin-V FITC staining. Most protocols do not wash. If you wash in what
buffer, Annexin Ca++ binding buffer, PBS etc.? This subject has been touched
on briefly in the past but not resolved.

Secondly, if staining for apoptotic cells with PI after ethanol fixation and
subsequent analysis for a sub-G1 peak, do investigators apply the same
strict criteria as to CVs of G0/G1 peaks as if they were solely performing
cell cycle analysis, i.e. <3% for a diploid human lymphocyte population?

Len Brown
Flow Cytometry
Mater Medical Research Institute
Brisbane, Australia



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