Re: Myeloperoxidase reference

Ellen Ko (litreq@dakousa.com)
Wed, 19 Mar 1997 10:09:22 -0800

A little info from some of our people in Germany:

Regarding MPO:

A. Fix & Perm is not the only way, but it is a good and easy way (it is
often recommended in consensus protocols)! You can buy it from caltag
in U.S. Most of our customers use this reagent! But it wont work for TdT
staining!!

B. MPO staining should also work by "handmade" methods:
a) e.g., Paraformaldehyde / Ethanol (PFE) treatment; 2x10to 6 cells were
fixed in 1 ml 1%PFA for 15 min.at RT. After that 1 ml PBS/BSA1% were added
drop by drop. Cells then were pelleted and resuspended in 2 ml 45% ethanol
in
PBS and incubated for 30 min. at RT. Then cells were washed twice with
PBS/BSA1% and stained.
- this method should also work, but I do not have any experiences about
background staining.

C. An easy way for reducing background staining is to include a
pre-incubation step with a mouse isotype-control antibody, not
fluorochrome conjugated for 15 min. before the "real" staining starts. Some
of our
customers do this in case of Ki-67 staining.

Jessica
DAKO GmbH

Ellen Ko
DAKO Corporation
Technical Service Specialist
http://www.dakousa.com
(800)424-0021

----------
> From: Elaine Kunze <mek4@psu.edu>
> To: Cytometry Mailing List <cytometry@flowcyt.cyto.purdue.edu>
> Subject: Myeloperoxidase reference
> Date: Tuesday, March 18, 1997 6:48 AM
>
>
> Myeloperoxidase reference:
> "Flow cytometric detection of intracellular antigens for
immunophenotyping
> of normal and malignant leukocytes" K Groeneveid, et al. Leukemia
(1996)
> 10, 1383-1389.
>
>
> ************************************
> Elaine Kunze
> Flow Cytometry......Image Analysis
> The Biotechnology Institute for Research and Education
> 8B Althouse Lab
> Penn State University
> University Park, PA 16802
> (814) 863-2762


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