Application of cross-flow filtration to the purification of biologically active peptides in human plasma after incubation with a protease-rich extract
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Application of cross-flow filtration to the purification of biologically active peptides in human plasma after incubation with a protease-rich extract. / Schlüter, H; Krivoy, N; Hürster, A; Ingendoh, A; Karas, M; Zidek, W.
In: J CHROMATOGR A, Vol. 625, No. 1, 13.11.1992, p. 3-11.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Application of cross-flow filtration to the purification of biologically active peptides in human plasma after incubation with a protease-rich extract
AU - Schlüter, H
AU - Krivoy, N
AU - Hürster, A
AU - Ingendoh, A
AU - Karas, M
AU - Zidek, W
PY - 1992/11/13
Y1 - 1992/11/13
N2 - The aim of this study was to find an experimental procedure to purify biologically active peptides from a complex biological matrix (plasma), which was incubated with a protease-rich extract (submandibular gland extract). Special interest was focused on the practicability of cross-flow filtration for this purpose. Therefore, peptides in the incubation mixture were purified with a combination of high-performance liquid chromatographic steps. Purification of biologically active peptides was monitored by a sensitive bioassay and by laser desorption/ionization mass spectrometry. This permitted not only purity control at each purification step but also identification of one of the peptides with vasoconstrictor properties as angiotensin II. This result demonstrates the practicability of cross-flow filtration for extracting enzymatic reaction products from complex substrate-enzyme mixtures during the incubation.
AB - The aim of this study was to find an experimental procedure to purify biologically active peptides from a complex biological matrix (plasma), which was incubated with a protease-rich extract (submandibular gland extract). Special interest was focused on the practicability of cross-flow filtration for this purpose. Therefore, peptides in the incubation mixture were purified with a combination of high-performance liquid chromatographic steps. Purification of biologically active peptides was monitored by a sensitive bioassay and by laser desorption/ionization mass spectrometry. This permitted not only purity control at each purification step but also identification of one of the peptides with vasoconstrictor properties as angiotensin II. This result demonstrates the practicability of cross-flow filtration for extracting enzymatic reaction products from complex substrate-enzyme mixtures during the incubation.
KW - Animals
KW - Electrophoresis, Polyacrylamide Gel
KW - Endopeptidases
KW - Filtration
KW - Humans
KW - Hydrolysis
KW - Male
KW - Peptides
KW - Rats
KW - Rats, Wistar
KW - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
M3 - SCORING: Journal article
C2 - 12126106
VL - 625
SP - 3
EP - 11
JO - J CHROMATOGR A
JF - J CHROMATOGR A
SN - 0021-9673
IS - 1
ER -