Fluorescence lifetime analysis was used in combination with conventional flow cytometric analysis to monitor changes in residual chromatin in apoptotic HL-60 cell populations following treatment with camptothecin, cycloheximide, genistein, H7, and gamma radiation. Data show that all of these metabolic inhibitors that act through different signaling cascades, produce apoptotic sub-populations with decreased, but different lifetimes for DNA-bound ethidium bromide (EB). Results indicate that lifetime analysis, in conjunction with conventional flow cytometry, can be useful for early detection of apoptosis-induced chromatin changes and can also potentially provide new information on the effects of different apoptosis inducing agents.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
3P41RR001315-16S1
Application #
6298021
Study Section
Project Start
1998-09-30
Project End
1999-06-30
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
16
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Los Alamos National Lab
Department
Type
DUNS #
City
Los Alamos
State
NM
Country
United States
Zip Code
87545
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