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Published on: June 21, 2024
Neural networks in chemotherapy-induced delayed nausea - a pilot-study using positron emission tomography
M Fredrikson1, T Hursti, G Wik
1KAROLINSKA INST,DEPT CLIN NEUROSCI,STOCKHOLM,SWEDEN. KAROLINSKA INST,DEPT CLIN PHARMACOL,STOCKHOLM,SWEDEN. KAROLINSKA HOSP,S-10401 STOCKHOLM,SWEDEN. UNIV MUNSTER,INST EXPTL AUDIOL,CTR BIOMAGNETISM,W-4400 MUNSTER,GERMANY.
Oncology Reports
|May 21, 2011
Summary
Delayed nausea in cancer patients may involve noradrenergic pathways, unlike acute nausea controlled by serotonin. This study used PET scans to observe brain activity differences during delayed nausea.
Area of Science:
- Neuroscience
- Medical Imaging
- Oncology
Background:
- Acute nausea is effectively managed by serotonergic antagonists.
- Delayed nausea and vomiting (N&V) pathophysiology remain less understood.
- Chemotherapy-induced N&V (CINV) significantly impacts patient quality of life.
Purpose of the Study:
- To investigate the central neural mechanisms underlying delayed nausea.
- To differentiate neural activity patterns in delayed versus acute nausea.
- To explore potential neurotransmitter systems involved in delayed N&V.
Main Methods:
- Utilized positron emission tomography (PET) to measure regional cerebral blood flow (rCBF).
- Analyzed neural activity in two cancer patients experiencing delayed nausea post-chemotherapy.
- Employed subtractive image methodology comparing rCBF during mild and moderate nausea.
Main Results:
- Identified increased neural activity in the anterior hypothalamus, vermis, anterior cingulate gyrus, and thalamus.
- Observed decreased neural activity in the pons and substantia nigra.
- Results suggest involvement of serotonergic and noradrenergic, but not dopaminergic, systems.
Conclusions:
- Delayed nausea may be mediated by noradrenergic pathways.
- These findings provide insights into the central nervous system substrates of delayed N&V.
- Further research into noradrenergic modulation for delayed N&V is warranted.
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