Multi-modal imaging of long-term recovery post-stroke by positron emission tomography and matrix-assisted laser desorption/ionisation mass spectrometry
Autor: | Jesús M. Pradillo, Hervé Boutin, Fiona Henderson, Michael Kassiou, Philippa J. Hart, Lidan Christie, Adam McMahon, Kaye J. Williams |
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Rok vydání: | 2018 |
Předmět: |
0301 basic medicine
Time Factors medicine.medical_treatment Mass spectrometry Mass spectrometry imaging Analytical Chemistry 03 medical and health sciences 0302 clinical medicine Nuclear magnetic resonance In vivo Journal Article medicine Animals Rats Wistar Stroke Spectroscopy Neuroinflammation medicine.diagnostic_test Chemistry Organic Chemistry Brain Lysophosphatidylcholines Magnetic resonance imaging medicine.disease Magnetic Resonance Imaging Sphingomyelins Pyrimidines 030104 developmental biology Positron emission tomography Positron-Emission Tomography Spectrometry Mass Matrix-Assisted Laser Desorption-Ionization Phosphatidylcholines Pyrazoles Stroke recovery 030217 neurology & neurosurgery |
Zdroj: | Henderson, F, Hart, P J, Pradillo, J M, Kassiou, M, Christie, L, Williams, K J, Boutin, H & McMahon, A 2018, ' Multi-modal imaging of long-term recovery post-stroke by positron emission tomography and matrix-assisted laser desorption/ionisation mass spectrometry ', Rapid Communications in Mass Spectrometry, vol. 32, no. 9, pp. 721-729 . https://doi.org/10.1002/rcm.8090 |
ISSN: | 0951-4198 |
Popis: | RATIONALE: Stroke is a leading cause of disability worldwide. Understanding the recovery process post-stroke is essential; however, longer-term recovery studies are lacking. In vivo positron emission tomography (PET) can image biological recovery processes, but is limited by spatial resolution and its targeted nature. Untargeted mass spectrometry imaging offers high spatial resolution, providing an ideal ex vivo tool for brain recovery imaging.METHODS: Magnetic resonance imaging (MRI) was used to image a rat brain 48 h after ischaemic stroke to locate the infarcted regions of the brain. PET was carried out 3 months post-stroke using the tracers [18 F]DPA-714 for TSPO and [18 F]IAM6067 for sigma-1 receptors to image neuroinflammation and neurodegeneration, respectively. The rat brain was flash-frozen immediately after PET scanning, and sectioned for matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-MS) imaging.RESULTS: Three months post-stroke, PET imaging shows minimal detection of neurodegeneration and neuroinflammation, indicating that the brain has stabilised. However, MALDI-MS images reveal distinct differences in lipid distributions (e.g. phosphatidylcholine and sphingomyelin) between the scar and the healthy brain, suggesting that recovery processes are still in play. It is currently not known if the altered lipids in the scar will change on a longer time scale, or if they are stabilised products of the brain post-stroke.CONCLUSIONS: The data demonstrates the ability to combine MALD-MS with in vivo PET to image different aspects of stroke recovery. |
Databáze: | OpenAIRE |
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