S. Nagamitsu et al., AGE-RELATED-CHANGES IN THE CEREBROSPINAL-FLUID LEVEL OF BETA-ENDORPHIN AND SUBSTANCE-P - SHORT COMMUNICATION, Journal of neural transmission, 105(1), 1998, pp. 53-58
To evaluate the early age-related changes in neuropeptides, we have me
asured the cerebrospinal fluid (CSF) levels of beta-endorphin and subs
tance P in young patients over a range of ages. Specimens of CSF were
obtained from 39 neurologically normal children, aged 1 month to 10 ye
ars of age, and in 9 adult controls. CSF levels of both neuropeptides
were observed to peak during the first year of life, and showed a nega
tive correlation with increasing age. A significant positive correlati
on was observed between the CSF level of beta-endorphin and that of su
bstance P.