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Modification of glucose metabolism in radiation-induced brain injury areas using cervical spinal cord stimulation
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Modification of glucose metabolism in radiation-induced brain injury areas using cervical spinal cord stimulation
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Journal Article
Modification of glucose metabolism in radiation-induced brain injury areas using cervical spinal cord stimulation
2009
Overview
Purpose
Radiation-induced brain injury (RBI) is an insidious side-effect of radiotherapy mediated by vascular alterations, inflammation and ischaemia. In previous studies we had shown potential increases in loco-regional blood flow and glucose metabolism in brain tumours by using electrical cervical spinal cord stimulation (SCS). In this preliminary report we demonstrate the effect of cervical SCS on RBI-tissue metabolism, as assessed using [
18
F]fluorodeoxyglucose-positron emission tomography (FDG-PET).
Methods
SCS devices were inserted in eight patients with diagnosis of potential RBI in previously irradiated areas. While the SCS device was deactivated, each patient underwent an initial FDG-PET study to evaluate the clinical status. A second FDG-PET study was performed later the same day while the SCS device was activated in order to evaluate the effect of cervical SCS on glucose metabolism.
Results
Basal glucose metabolism in RBI areas was 31% lower than peri-RBI areas (
p
= 0.009) and 32% lower than healthy contra-lateral areas (
p
= 0.020). There was a significant increase in glucose uptake during SCS in both the RBI (
p
= 0.005) and the peri-RBI (
p
= 0.004) areas, with measured increases of 38 and 42%, respectively. The estimated potential maximal residual activity of the first FDG dose’s contribution to the activity on the second scan was ≤14.3 ± 4.6%.
Conclusions
In this study using PET, SCS increased glucose metabolism in RBI and peri-RBI areas. These results warrant further clinical investigation to elucidate more fully the clinical usefulness of SCS in these patients.
Publisher
Springer Vienna,Springer Nature B.V
Subject
/ Afferent Pathways - physiology
/ Aged
/ Brain Damage, Chronic - diagnostic imaging
/ Brain Damage, Chronic - metabolism
/ Brain Damage, Chronic - physiopathology
/ Brain Neoplasms - radiotherapy
/ Cerebrovascular Circulation - physiology
/ Electric Stimulation - methods
/ Energy Metabolism - physiology
/ Female
/ Humans
/ Male
/ Medicine
/ Positron-Emission Tomography - methods
/ Radiation Injuries - diagnostic imaging
/ Radiation Injuries - metabolism
/ Radiation Injuries - physiopathology
