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Substance P in the central nervous system.

R D Helme, D W White

    Clinical and Experimental Neurology
    |January 1, 1981
    PubMed
    Summary

    A new radioimmunoassay accurately measures substance P-like immunoreactivity. This method detected substance P in rat and human central nervous system tissues, confirming its presence in the spinal cord dorsal horn.

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    Area of Science:

    • Neuroscience
    • Immunology
    • Biochemistry

    Background:

    • Substance P is a neuropeptide implicated in pain transmission and other neurological processes.
    • Accurate quantification of Substance P is crucial for understanding its role in the central nervous system.

    Purpose of the Study:

    • To develop and validate a sensitive radioimmunoassay for measuring substance P-like immunoreactivity.
    • To investigate the distribution of substance P in postmortem central nervous system tissues.

    Main Methods:

    • Development of a radioimmunoassay with a sensitivity of 0.7 fmoles of substance P.
    • Analysis of postmortem rat and human central nervous system tissue samples.
    • Immunofluorescence microscopy for tissue localization.

    Main Results:

    • The developed radioimmunoassay demonstrated high sensitivity for substance P.
    • Substance P-like immunoreactivity was successfully detected in postmortem central nervous system tissues from both rats and humans.
    • Immunofluorescence confirmed the presence of substance P in the dorsal horn of the spinal cord.

    Conclusions:

    • The established radioimmunoassay is a reliable tool for quantifying substance P-like immunoreactivity.
    • Substance P is present in the central nervous system of both rats and humans, particularly in the dorsal horn of the spinal cord.
    • This finding supports the role of Substance P in spinal cord function and pain pathways.

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