In vivo imaging of cerebral glucose metabolism informs on subacute to chronic post-stroke tissue status - A pilot study combining PET and deuterium metabolic imaging.
Anu E MeerwaldtMilou StraathofWija OosterveldCaroline L van HeijningenMandy Mt van LeentYohana C TonerJazz MunitzAbraham Jp TeunissenCharlotte C DaemenAnnette van der ToornGerard van VlietGeralda Af van TilborgHenk M De FeyterRobin A de GraafElly M HolWillem Jm MulderRick M DijkhuizenPublished in: Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism (2023)
Recanalization therapy after acute ischemic stroke enables restoration of cerebral perfusion. However, a significant subset of patients has poor outcome, which may be caused by disruption of cerebral energy metabolism. To assess changes in glucose metabolism subacutely and chronically after recanalization, we applied two complementary imaging techniques, fluorodeoxyglucose (FDG) positron emission tomography (PET) and deuterium ( 2 H) metabolic imaging (DMI), after 60-minute transient middle cerebral artery occlusion (tMCAO) in C57BL/6 mice. Glucose uptake, measured with FDG PET, was reduced at 48 hours after tMCAO and returned to baseline value after 11 days. DMI revealed effective glucose supply as well as elevated lactate production and reduced glutamate/glutamine synthesis in the lesion area at 48 hours post-tMCAO, of which the extent was dependent on stroke severity. A further decrease in oxidative metabolism was evident after 11 days. Immunohistochemistry revealed significant glial activation in and around the lesion, which may play a role in the observed metabolic profiles. Our findings indicate that imaging (altered) active glucose metabolism in and around reperfused stroke lesions can provide substantial information on (secondary) pathophysiological changes in post-ischemic brain tissue.
Keyphrases
- positron emission tomography
- computed tomography
- pet ct
- high resolution
- middle cerebral artery
- pet imaging
- cerebral ischemia
- acute ischemic stroke
- subarachnoid hemorrhage
- atrial fibrillation
- end stage renal disease
- single cell
- chronic kidney disease
- healthcare
- stem cells
- metabolic syndrome
- newly diagnosed
- prognostic factors
- mass spectrometry
- photodynamic therapy
- blood glucose
- ejection fraction
- adipose tissue
- internal carotid artery
- brain injury
- multiple sclerosis
- drug induced
- ischemia reperfusion injury