High-resolution in vivo imaging of breast cancer by targeting the pro-invasive integrin alphavbeta6
High-resolution in vivo imaging of breast cancer by targeting the pro-invasive integrin alphavbeta6
The integrin αvβ6 is expressed only on epithelia and then usually only during processes of tissue remodelling including cancer, where its high expression correlates with reduced survival. Thus, αvβ6 represents an important target for imaging and therapy of cancer and new molecular-specific targeting agents are required. We have developed A20FMDV2, a peptide derived from the VP1 coat protein of foot-and-mouth-disease virus that binds specifically and stably to αvβ6. Using a newly generated pair of isogenic human cell lines that differ only in αvβ6 expression, it was shown, using biodistribution and SPECT imaging, that indium-111-labelled A20FMDV2 locates specifically to αvβ6-expressing tissues in vivo, achieving at least seven-times higher retention in αvβ6-positive than in αvβ6-negative tumours. In further studies with MCF10.DCIS.COM and MCF10A.CA1a breast carcinoma cell lines, which express αvβ6 endogenously, the radiopeptide achieved similar levels of tumour retention and permitted excellent discriminatory imaging of tumours. Thus, A20FMDV2 can be used for molecular-specific targeting of αvβ6 for imaging in vivo the often more aggressive, αvβ6-positive cancers. In the future, A20FMDV2 could serve also to deliver therapy to these same cancers.
Saha, Antonio
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Ellison, David
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Thomas, G.J.
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Vallath, Sabarinath
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Mather, Stephen J.
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Hart, Ian R.
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Marshall, John F.
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September 2010
Saha, Antonio
5c8fa745-a9fd-4548-a246-113c4addd4f3
Ellison, David
3ca39d61-b268-4a9b-98db-cc6f92d70e4f
Thomas, G.J.
2ff54aa9-a766-416b-91ee-cf1c5be74106
Vallath, Sabarinath
6ded32fe-00c2-4868-8689-cd0fb701555a
Mather, Stephen J.
c989d604-e020-4b02-b36f-9f0e4c51a2f7
Hart, Ian R.
6a3728fc-5385-4dd4-a5e3-edd5168a0e8d
Marshall, John F.
1134b21f-7f23-4ee6-aaf5-c7580b73c10b
Saha, Antonio, Ellison, David, Thomas, G.J., Vallath, Sabarinath, Mather, Stephen J., Hart, Ian R. and Marshall, John F.
(2010)
High-resolution in vivo imaging of breast cancer by targeting the pro-invasive integrin alphavbeta6.
The Journal of Pathology, 222 (1).
(doi:10.1002/path.2745).
(PMID:20629113)
Abstract
The integrin αvβ6 is expressed only on epithelia and then usually only during processes of tissue remodelling including cancer, where its high expression correlates with reduced survival. Thus, αvβ6 represents an important target for imaging and therapy of cancer and new molecular-specific targeting agents are required. We have developed A20FMDV2, a peptide derived from the VP1 coat protein of foot-and-mouth-disease virus that binds specifically and stably to αvβ6. Using a newly generated pair of isogenic human cell lines that differ only in αvβ6 expression, it was shown, using biodistribution and SPECT imaging, that indium-111-labelled A20FMDV2 locates specifically to αvβ6-expressing tissues in vivo, achieving at least seven-times higher retention in αvβ6-positive than in αvβ6-negative tumours. In further studies with MCF10.DCIS.COM and MCF10A.CA1a breast carcinoma cell lines, which express αvβ6 endogenously, the radiopeptide achieved similar levels of tumour retention and permitted excellent discriminatory imaging of tumours. Thus, A20FMDV2 can be used for molecular-specific targeting of αvβ6 for imaging in vivo the often more aggressive, αvβ6-positive cancers. In the future, A20FMDV2 could serve also to deliver therapy to these same cancers.
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Published date: September 2010
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Local EPrints ID: 179133
URI: http://eprints.soton.ac.uk/id/eprint/179133
ISSN: 1096-9896
PURE UUID: 31d502d5-47b6-4724-8b53-9fedc28932fc
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Date deposited: 08 Apr 2011 10:16
Last modified: 14 Mar 2024 02:47
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Author:
Antonio Saha
Author:
David Ellison
Author:
Sabarinath Vallath
Author:
Stephen J. Mather
Author:
Ian R. Hart
Author:
John F. Marshall
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