Re: negative control for cytoplasmic C-mu or CD3

From: austin (austin63@ms12.hinet.net)
Date: Fri Dec 16 1994 - 19:28:56 EST


Dear Flow-ers,

My colleague and I would like to set up a test for the expression of 
cytoplasmic IgM for differential diagnosis of B-ALL and would 
appreciate any comments /advices /references on the problems that we 
encountered, mainly how would one tell the difference between a surface IgM 
versus a cytoplasmic IgM? Can I somehow block the staining of surface IgM 
or can I quench the surface staining as is being done with phagocytosis 
tests? And is there any good controls for the tests?

We are also evaluating the possibility of performing a cytoplamic CD3 
staining for diagnosis of T-ALL and, quiet possibly use it for monitoring 
of minimal residual disease.  We have the same concerns for this 
test as we mentioned for cytoplasmic c-mu and would appreciate any comments 
/advices /references.  


Warm regards,
Austin Lin
Core Facility Laboratory-Flow Cytometer,
Cheng Gung Medical College
Tainan, Taiwan



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