Microdialysis in trigeminal ganglia.
John K Neubert1, Yoshizo Matsuka, Nigel T Maidment
1Pain Neurosensory Mechanisms Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA. jneubert@dir.nidcr.nih.gov
Brain Research. Brain Research Protocols
|November 15, 2002
Summary
Researchers used microdialysis in guinea pig trigeminal ganglia (TG) to measure sensory signaling substances. This technique allows studying neurochemicals like substance P (SP) and adenosine triphosphate (ATP) in physiological and pathological states.
Area of Science:
- Neuroscience
- Sensory Physiology
Background:
- Neurons in sensory ganglia play a crucial role in physiological and pathological sensory signaling.
- In vivo sampling from sensory ganglia offers insights into substances mediating sensory transmission.
Purpose of the Study:
- To apply the microdialysis technique to the guinea pig trigeminal ganglia (TG) for in vivo sampling.
- To demonstrate the recovery and analysis of key neurochemicals, substance P (SP) and adenosine triphosphate (ATP), as examples.
Main Methods:
- Utilized microdialysis probes inserted into the guinea pig trigeminal ganglia (TG).
- Focused on the recovery and analysis of substance P (SP) and adenosine triphosphate (ATP) as representative substances.
- Explored the potential for physiological and pharmacological manipulations to monitor peptide release.
Main Results:
- Successfully applied microdialysis within the TG for in vivo substance recovery.
- Demonstrated the measurement of substance P (SP) and adenosine triphosphate (ATP) from the TG.
- Showcased the feasibility of studying ganglionic neurochemical release under various conditions, including inflammation.
Conclusions:
- Microdialysis in the TG is a valuable method for recovering and measuring extracellular substances involved in trigeminal sensory processing.
- This technique facilitates the study of neurochemical mediators in both normal and disease states.
- The TG serves as an ideal site for investigating trigeminal sensory information processing due to its accessibility and somatotopic organization.
