TY - JOUR
T1 - Identification of synaptic metabolites of dynorphin A (1-8) by electrospray ionization and tandem mass spectrometry
AU - Prokai, Laszlo
AU - Zharikova, Alevtina D.
PY - 1998
Y1 - 1998
N2 - Synaptic metabolism of the endogenous opioid octapeptide dynorphin (Dyn) A (1-8) (Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile) was studied in vitro upon its incubation with synaptosomes and with synaptosomal plasma membranes isolated from rat brain tissue. Electrospray ionization (ESI) and tandem mass spectrometry were performed using anion trap instrument, and afforded the identification of Dyn A (2-8), Dyn A (1-6) and leucine enkephalin [Dyn A (1-5)] as major metabolites. Preliminary quantitative data on the kinetics of Dyn A (1-8) degradation and metabolite formation was obtained by size-exclusion chromatography/ESI tandem mass spectrometry, and revealed an apparent involvement of several enzymes in the metabolism upon incubation with synaptosomes. Predominant formation of Dyn A (1-6) was observed with the synaptosomal plasma membranes.
AB - Synaptic metabolism of the endogenous opioid octapeptide dynorphin (Dyn) A (1-8) (Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile) was studied in vitro upon its incubation with synaptosomes and with synaptosomal plasma membranes isolated from rat brain tissue. Electrospray ionization (ESI) and tandem mass spectrometry were performed using anion trap instrument, and afforded the identification of Dyn A (2-8), Dyn A (1-6) and leucine enkephalin [Dyn A (1-5)] as major metabolites. Preliminary quantitative data on the kinetics of Dyn A (1-8) degradation and metabolite formation was obtained by size-exclusion chromatography/ESI tandem mass spectrometry, and revealed an apparent involvement of several enzymes in the metabolism upon incubation with synaptosomes. Predominant formation of Dyn A (1-6) was observed with the synaptosomal plasma membranes.
UR - http://www.scopus.com/inward/record.url?scp=0031782009&partnerID=8YFLogxK
U2 - 10.1002/(sici)1097-0231(19981130)12:22<1796::aid-rcm362>3.3.co;2-z
DO - 10.1002/(sici)1097-0231(19981130)12:22<1796::aid-rcm362>3.3.co;2-z
M3 - Article
C2 - 9853388
AN - SCOPUS:0031782009
SN - 0951-4198
VL - 12
SP - 1796
EP - 1800
JO - Rapid Communications in Mass Spectrometry
JF - Rapid Communications in Mass Spectrometry
IS - 22
ER -