[Histonet] Fixatives for IHF
Alejandro Ortiz Stern
stern <@t> ipmc.cnrs.fr
Fri Apr 13 10:26:13 CDT 2007
I am working on mouse lung, and have come across a small problem.
Basically I embed the lungs in OCT/sucrose with snap freezing in
Isopentane and then postfix.
Initially I was postfixing in pure acetone but there staining with
certain antibodies was not working
We are trying to detect: DAPI, Smooth muscle actin (directly labeled
PE), CD4 (Directly labeled Alexa 647), Thy1.1 (FITC coupled + GARabitt
Alexa 488) and Thy1.2 (Biotinylated + Stv Alexa 594)
Now the conflict:
When I postfix with 100% EtOH I get a very nice staining with Thy1.1 and
CD4 but have not managed to see the Thy1.1 and the SMA looks terrible
When I postfix with either Acetone or PAF 1% the SMA look lovely but the
CD4 staining is very dull.
I have not managed yet to detect the Stv Alexa 594 signal yet.
How can I get the best of both worlds? A very nice and well demarcated
SMA staining (as with PAF of Acetone) with a nice CD4 staining (as with
Any input will be welcomed.
Alejandro Ortiz Stern M.D. Ph.D.,
Institut National de la Santé et de la Recherche Médicale, E0344
Université de Nice-Sophia-Antipolis
Institut de Pharmacologie Moléculaire et Cellulaire
660 Route des Lucioles - 06560 Valbonne - FRANCE
TEL: 33 (4) 93 95 77 80 - FAX: 33 (4) 93 95 77 08
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