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- Title
Bcl-2 overexpression prevents 99mTc-MIBI uptake in breast cancer cell lines.
- Authors
Aloj, Luigi; Zannetti, Antonella; Caracó, Corradina; Del Vecchio, Silvana; Salvatore, Marco
- Abstract
We have previously shown a correlation between the absence of technetium-99m methoxyisobutylisonitrile ((99m)Tc-MIBI) uptake and overexpression of the anti-apoptotic protein Bcl-2 in human breast carcinoma. To establish a direct cause-effect relationship between Bcl-2 overexpression and reduced (99m)Tc-MIBI uptake, MCF-7 and T47D breast cancer cell lines were stably transfected with the human Bcl-2 gene to increase intracellular protein levels and tested for (99m)Tc-MIBI uptake. All clones overexpressing Bcl-2 showed a dramatic reduction of (99m)Tc-MIBI uptake as compared with mock transfected control cells. Tracer uptake was promptly and partially restored by induction of apoptosis with staurosporine treatment. After 4.5 h of staurosporine treatment, a tenfold increase in (99m)Tc-MIBI uptake was observed in treated as compared with untreated Bcl-2 overexpressing cells. Our findings provide a rational basis for the development of an in vivo test to detect Bcl-2 overexpression in human tumours.
- Publication
European journal of nuclear medicine and molecular imaging, 2004, Vol 31, Issue 4, p521
- ISSN
1619-7070
- Publication type
Journal Article
- DOI
10.1007/s00259-003-1381-0