title: Beta-endorphin-, leucine enkephalin- and methionine enkephalin-like immunoreactivity in human cerebrospinal fluid. Simultaneous determination and relation to neurological disorders.
abstract: beta-Endorphin, leucine enkephalin and methionine enkephalin, were measured in 41 samples of human lumbar cerebrospinal fluid (CSF) of patients with different neurological diseases. beta-Endorphin-like immunoreactivity (beta-ELI) was present in concentrations between 10 and 150 fmol/ml CSF, and in 30 of the 41 samples studied the levels ranged from 10 to 40 fmol/ml. Methionine enkephalin-like immunoreactivity (MELI) measured 1-85 pmol/ml CSF, with 24 of the 41 samples having values between 3 and 4 pmol/ml. CSF concentrations of leucine enkephalin-like immunoreactivity (LELI) ranged from 0.1 to 12.5 pmol/ml, and in 31 of the 41 CSF samples studied LELI was present in concentrations of 0.1-0.25 pmol/ml. No significant relationship exists between the concentrations of beta-endorphin in CSF and sex and age of patients, CSF protein, CSF IgG and CSF leukocytes. No interrelationship could be found between beta-ELI, MELI and LELI concentrations.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002493:Central Nervous System Diseases / Q000134:cerebrospinal fluid; D004723:Endorphins / Q000134:cerebrospinal fluid* / Q000276:immunology; D004743:Enkephalin, Leucine / Q000134:cerebrospinal fluid* / Q000276:immunology; D004744:Enkephalin, Methionine / Q000134:cerebrospinal fluid* / Q000276:immunology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D004744:Enkephalin, Methionine; D004743:Enkephalin, Leucine; D001615:beta-Endorphin