Choroid plexus blood flow: evidence for dopaminergic influence

Area of Science:

• Physiology
• Pharmacology
• Neuroscience

Background:

• The regulation of blood flow in the choroid plexus is not fully understood.
• Investigating the role of neurotransmitters in regulating cerebral blood flow is crucial.

Purpose of the Study:

• To investigate the effects of dopamine, haloperidol, and propranolol on choroid plexus blood flow.
• To compare these effects with renal and cortical blood flow.

Main Methods:

• Radioactive microsphere technique was used to measure blood flow in adult female sheep.
• Infusions of dopamine, haloperidol, and propranolol were administered.

Main Results:

• Dopamine significantly increased choroid plexus blood flow (55%) and renal blood flow (49%).
• Haloperidol significantly decreased choroid plexus blood flow (-24%) and renal blood flow (-29%).
• Cortical blood flow and blood flow changes with propranolol were not significant.

Conclusions:

• Dopaminergic mechanisms play a significant role in regulating choroid plexus blood flow.
• Dopaminergic mechanisms also appear to regulate renal blood flow.
• Further research into neurotransmitter regulation of cerebral blood flow is warranted.