Cerebral abnormalities in cocaine abusers: demonstration by SPECT perfusion brain scintigraphy. Work in progress

Area of Science:

• Neuroscience
• Radiology
• Pharmacology

Background:

• Cocaine abuse is a significant public health issue with potential neurological consequences.
• Assessing cerebral perfusion in cocaine users is crucial for understanding drug-induced brain changes.

Purpose of the Study:

• To investigate cerebral perfusion abnormalities in individuals with a history of cocaine use using Single Photon Emission Computed Tomography (SPECT).
• To determine the prevalence and characteristics of these abnormalities, particularly in relation to the duration and route of cocaine administration.

Main Methods:

• 12 subjects with varying degrees of cocaine use underwent iodine-123 isopropyl iodoamphetamine (IMP) SPECT brain scans.
• Brain scans of subjects were compared to those of 5 healthy volunteers.
• Data on cocaine use patterns and concurrent drug abuse were collected.

Main Results:

• Focal perfusion defects were identified in 11 out of 12 cocaine users, with 7 being asymptomatic.
• Deficits were commonly observed in the frontal and temporal lobes, varying in severity.
• No perfusion abnormalities were detected in healthy volunteers.

Conclusions:

• Cocaine use is frequently associated with focal cerebral perfusion deficits, detectable by I-123 IMP SPECT.
• These deficits can occur even in asymptomatic individuals, highlighting the neurotoxic potential of cocaine.
• I-123 IMP SPECT is a valuable tool for visualizing drug-induced alterations in cerebral blood flow.