transcriptional activity and mRNA stability

Mark R. Miglarese miglaresemr at
Fri Apr 26 07:38:09 EST 1996

Dear Osama,

Nuclear run-ons will measure transcriptional activity, but mRNA 
stability must be addressed using Actinomycin D (an RNA Pol II 
inhibitor).  I don't have a protocol handy, but basically you incubate 
the cells of interest with Act D and prepare RNA for Northern analysis 
at various time points.  The decrease in signal over time is a measure 
of your mRNA degradation, since no new transcripts are being made during 
the incubation.

Good luck,

Mark R. Miglarese, Ph.D.
Cancer Research
Pfizer Central Research
Box 372                        
Eastern Point Road              
Groton, CT USA 06340
Phone: (860) 441-8478
FAX:   (860) 441-1290
Email: miglaresemr at

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