JoVE Encyclopedia of Experiments
Neurowetenschap
0 weergaven • 3:47 min • August 29th, 2025
Take an anesthetized rat with deep brain stimulation or DBS electrodes implanted in the medial prefrontal cortex.
Inject FDG, a radiolabeled glucose analog, through the lateral tail vein.
FDG crosses the blood-brain barrier via glucose transporters, and reaches the brain.
Prepare the stimulator setup in a quiet environment to minimize potentially disturbing stimuli.
Connect the stimulation wires to the electrodes.
Start DBS. High-frequency electrical pulses depolarize neuronal membranes, enhancing synaptic activity.
This increases neuronal ATP consumption, accelerating glucose metabolism to replenish ATP levels.
Enhanced glucose utilization increases FDG uptake in metabolically active neurons and glia, where it undergoes phosphorylation and accumulation.
Stop the stimulation. Capture PET and CT brain images and generate brain maps.
Increased FDG uptake indicates more active brain regions, while less active areas show lower uptake, revealing DBS-induced metabolic neuromodulation.
Fill a 27 gauge syringe with approximately 37 megabecquerel of the FDG solution in the least possible volume as measured in an activimeter. Place a heating pad under the animal's tail or use infrared light to dilate the tail veins. Inject the FDG solution through one of the lateral tail veins.
Place the animal back in the cage and allow 45 minutes for radio tracer uptake before initiating the image acquisition session. For the D2 study, deliver DBS during the FDG uptake period. Prepare the isolated stimulator and the required wires in a vast and quiet room with enough space for the animal cages and minimal influence of potentially disturbing stimuli.
Connect the stimulation wires to the swivels to allow animals to freely move within the cages and to the stimulator. Set the stimulation parameters as described in the text manuscript. Use an oscilloscope to check the current mode, frequency, and pulse width.
Confirm the biphasic wave form with a rectangular pulse shape. The CT image clearly visualized the electrode inserted into the rat brain. The imaging modality used in this study also provided good anatomical information and facilitated the registration of FDG-PET images.
A fused PET-CT image of the same animal spatially registered to the same stereotaxic space. The brain metabolic differences were observed between PET sessions as T-maps superimposed on sequential one millimeter brain slices from an MRI registered to the reference CT image. These differences consisted of increases and decreases in FDG uptake shown as warm and cold colors respectively.
Deze studie onderzoekt de effecten van diepe hersenstimulatie (DBS) op het glucosemetabolisme in de rattenhersenen met behulp van FDG-PET-beeldvorming. De methodologie omvat het toedienen van een radiogestempeld glucoseanalogon en daaropvolgende beeldvorming om de metabole activiteit te beoordelen.
Deze methode stelt R&D-teams in de biofarmaceutische industrie in staat om metabole neuromodulatie, geïnduceerd door neuromodulatoire interventies zoals diepe hersenstimulatie, kwantitatief te beoordelen. Door veranderingen in het glucosemetabolisme in kaart te brengen via FDG-PET, ondersteunt het de validatie van targets en het mechanistisch reduceren van risico's in preklinische neurowetenschappelijke programma's. De aanpak biedt voorspellende zekerheid bij de vertaling van neuromodulatiestrategieën van de ontdekkingsfase naar de preklinische ontwikkeling.
De methode past binnen het ontdekkingscontinuüm, van het testen van doelwit-hypotheses via lead-identificatie tot preklinische validatie, in het bijzonder voor programma's die gericht zijn op neuromodulatie.
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Gerelateerde video's
0 Bekeken
Laatst bijgewerkt: 22 augustus 2026