[Histonet] feulgen stain on brain sections

Geoff McAuliffe mcauliff <@t> umdnj.edu
Mon Feb 9 10:07:05 CST 2009

Dear TF:

Schiff reagent reacts with the lipids (the aldehydes in the lipids) in 
the frozen sections so the whole section is pink. You could try 
extracting the "offending" lipids with alcohols and xylene, then 
rehydrate to water and run the reaction again. A better plan is to 
search the literature first, the old literature in books in the library. 
Look for Histochemistry by A.G.E. Pearse.
Also 1.5 hours in %N HCl seems excessive, again check the literature for 
the correct time on unfixed frozen sections.
After you solve the Schiff problem the light green in distilled water 
should work fine.


TF wrote:
> Hi all, i amusing Feulgen staining to visualize the apoptotic cells on 20 um brain frozen sections.
> The procedure is 5N HCl room temperature for 1.5 hour, wash in cool 1N HCl, wash in water, Schiff staining room temperature 1 h, wash throughly in distilled water, counterstain with 1% light green.
> I have two questions here:
> (1) after schiff staining, i can not visualize individual nucleui clearly, but all the section seems to be stained red.
> (2) I use distilled water to prepare 1% light green, am I right? I can not counterstain the section well - or, possibly because the sections are still in red color.
> 2009-02-07 
> TF 
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Geoff McAuliffe, Ph.D.
Neuroscience and Cell Biology
Robert Wood Johnson Medical School
675 Hoes Lane, Piscataway, NJ 08854
voice: (732)-235-4583 
mcauliff <@t> umdnj.edu

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