Paraformaldehyde and PI

From: Tomas Corcoran (mascor@gofree.indigo.ie)
Date: Tue Apr 17 2001 - 13:44:19 EST


I wonder whether anyone has experience or opinions on this :

Does 0.5-2 %paraformaldehyde fixation of endothelial cells or tumour cells permeabilise cells to PI or not.Different sources say yes and no , but we have found that after removal of adherent cells from culture plates with 2mM EDTA and fixation that almost all cells stain with PI . Does paraformaldehyde fixation preclude meaningful viability assessment or not . 

Many thanks.

mascor@gofree.indigo.ie



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