title: Investigation of synthetic peptide hormones by liquid chromatography coupled to pneumatically assisted electrospray ionization mass spectrometry: analysis of a synthesis crude of peptide triptorelin.
abstract: Triptorelin, a synthetic peptide hormone used in the treatment of prostate cancer by means of reduction in the action of male hormone testosterone, is studied here. The synthetic procedure commonly results in unwanted side products that require extensive purification and characterization of the synthesis mixture. The chromatographic separation of triptorelin from the crude mixture was developed by applying the linear solvation energy relationship (LSER) methodology previously developed, to optimize the composition of the mobile phase in order to avoid lengthy empirical optimization procedures. Electrospray ionization mass spectrometry coupled to liquid chromatography (LC/ES-MS) was used to obtain reliable information on the inevitable side products. The knowledge of the identity of these impurities allows fast optimization of the synthetic procedure and also the therapeutic use of triptorelin peptide hormone.
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain. nebot@zeus.qui.ub.es
authors.forename: V
authors.initials: V
authors.lastname: Sanz-Nebot
authors.forename: I
authors.initials: I
authors.lastname: Toro
authors.forename: A
authors.initials: A
authors.lastname: Castillo
authors.forename: J
authors.initials: J
authors.lastname: Barbosa
mesh_terms: D000595:Amino Acid Sequence; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D009842:Oligopeptides / Q000737:chemistry*; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D017329:Triptorelin Pamoate / Q000031:analogs & derivatives* / Q000737:chemistry*
chemical_list: D009842:Oligopeptides; D017329:Triptorelin Pamoate