Abstract:
:The geldanamycin derivative 17-allylamino-17-demethoxygeldanamycin (17-AAG) is known to induce internalisation and degradation of the otherwise internalisation-resistant human epidermal growth factor receptor 2 (HER2) receptor. In the present study, 17-AAG was used to increase internalisation of the HER2-specific Affibody molecule ABY-025. The cellular redistribution of halogen-labelled 211At-ABY-025 and radiometal-labelled 111In-ABY-025 following treatment with 17-AAG was studied. 17-AAG treatment of SKOV-3 human ovarian carcinoma and SKBR-3 human breast carcinoma cells to some extent shifted the localisation of 111In-ABY-025 from the cell surface to intracellular compartments in the two cell lines. ABY-025 labelled with the high-linear energy transfer α emitter 211At was also internalised to a higher degree; however, due to its physiological properties, this nuclide was excreted faster. The results indicate that 17-AAG may be used to facilitate cell-specific intracellular localisation of a suitable cytotoxic or radioactive agent coupled to ABY-025 in HER2-overexpressing cells.
journal_name
Oncol Lettjournal_title
Oncology lettersauthors
Göstring L,Lindegren S,Gedda Ldoi
10.3892/ol.2016.4990subject
Has Abstractpub_date
2016-10-01 00:00:00pages
2574-2580issue
4eissn
1792-1074issn
1792-1082pii
OL-0-0-4990journal_volume
12pub_type
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