Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack
About 20% of patients with ischaemic stroke have a preceding transient ischaemic attack, which is clinically defined as focal neurological symptoms of ischaemic origin resolving spontaneously. Failure to diagnose transient ischaemic attack is a wasted opportunity to prevent recurrent disabling strok...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Oxford University Press
2016
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| _version_ | 1797058019370991616 |
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| author | Quenault, A Martinez De Lizarrondo, S Etard, O Gauberti, M Orset, C Haelewyn, B Segal, H Rothwell, P Vivien, D Touzé, E Ali, C |
| author_facet | Quenault, A Martinez De Lizarrondo, S Etard, O Gauberti, M Orset, C Haelewyn, B Segal, H Rothwell, P Vivien, D Touzé, E Ali, C |
| author_sort | Quenault, A |
| collection | OXFORD |
| description | About 20% of patients with ischaemic stroke have a preceding transient ischaemic attack, which is clinically defined as focal neurological symptoms of ischaemic origin resolving spontaneously. Failure to diagnose transient ischaemic attack is a wasted opportunity to prevent recurrent disabling stroke. Unfortunately, diagnosis can be difficult, due to numerous mimics, and to the absence of a specific test. New diagnostic tools are thus needed, in particular for radiologically silent cases, which correspond to the recommended tissue-based definition of transient ischaemic attack. As endothelial activation is a hallmark of cerebrovascular events, we postulated that this may also be true for transient ischaemic attack, and that it would be clinically relevant to develop non-invasive in vivo imaging to detect this endothelial activation. Using transcriptional and immunohistological analyses for adhesion molecules in a mouse model, we identified brain endothelial P-selectin as a potential biomarker for transient ischaemic attack. We thus developed ultra-sensitive molecular magnetic resonance imaging using antibody-based microparticles of iron oxide targeting P-selectin. This highly sensitive imaging strategy unmasked activated endothelial cells after experimental transient ischaemic attack and allowed discriminating transient ischaemic attack from epilepsy and migraine, two important transient ischaemic attack mimics. We provide preclinical evidence that combining conventional magnetic resonance imaging with molecular magnetic resonance imaging targeting P-selectin might aid in the diagnosis of transient ischaemic attack. |
| first_indexed | 2024-03-06T19:44:38Z |
| format | Journal article |
| id | oxford-uuid:21d9966c-3f73-4d58-9138-08eca6dd2ae5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:44:38Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:21d9966c-3f73-4d58-9138-08eca6dd2ae52022-03-26T11:35:38ZMolecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attackJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:21d9966c-3f73-4d58-9138-08eca6dd2ae5EnglishSymplectic Elements at OxfordOxford University Press2016Quenault, AMartinez De Lizarrondo, SEtard, OGauberti, MOrset, CHaelewyn, BSegal, HRothwell, PVivien, DTouzé, EAli, CAbout 20% of patients with ischaemic stroke have a preceding transient ischaemic attack, which is clinically defined as focal neurological symptoms of ischaemic origin resolving spontaneously. Failure to diagnose transient ischaemic attack is a wasted opportunity to prevent recurrent disabling stroke. Unfortunately, diagnosis can be difficult, due to numerous mimics, and to the absence of a specific test. New diagnostic tools are thus needed, in particular for radiologically silent cases, which correspond to the recommended tissue-based definition of transient ischaemic attack. As endothelial activation is a hallmark of cerebrovascular events, we postulated that this may also be true for transient ischaemic attack, and that it would be clinically relevant to develop non-invasive in vivo imaging to detect this endothelial activation. Using transcriptional and immunohistological analyses for adhesion molecules in a mouse model, we identified brain endothelial P-selectin as a potential biomarker for transient ischaemic attack. We thus developed ultra-sensitive molecular magnetic resonance imaging using antibody-based microparticles of iron oxide targeting P-selectin. This highly sensitive imaging strategy unmasked activated endothelial cells after experimental transient ischaemic attack and allowed discriminating transient ischaemic attack from epilepsy and migraine, two important transient ischaemic attack mimics. We provide preclinical evidence that combining conventional magnetic resonance imaging with molecular magnetic resonance imaging targeting P-selectin might aid in the diagnosis of transient ischaemic attack. |
| spellingShingle | Quenault, A Martinez De Lizarrondo, S Etard, O Gauberti, M Orset, C Haelewyn, B Segal, H Rothwell, P Vivien, D Touzé, E Ali, C Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title | Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title_full | Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title_fullStr | Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title_full_unstemmed | Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title_short | Molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
| title_sort | molecular magnetic resonance imaging discloses endothelial activation after transient ischaemic attack |
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