title: HPLC determination of morphine, morphine-3-glucuronide and morphine-6-glucuronide in human serum of oncological patients after administration of morphine drugs.
abstract: A simultaneous determination of morphine (M) and its two metabolites, morphine-3-glucuronide (M3G) and morphine-6-glucuronide (M6G), by HPLC in the serum of oncological patients is described. The compounds are extracted from the serum by means of Chromabond C18--EC solid-phase-extraction cartridges, separated on a Symmetry C18 analytical column (150 x 4.9 mm, 5 microm) and detected by a UV detector at 210 nm. The mobile phase consisted of 8% acetonitrile in water, 30 mmol/l phosphate buffer (pH 3) and 1 mmol/l octane sulfonic acid as the ion pairing agent; its flow-rate was 0.8 ml/min. Under these conditions, the detection limits were 10 ng/ml, 60 ng/ml and 90 ng/ml for M, M3G, and M6G, respectively. This paper concerns blood serum concentration levels of M, M3G and M6G in oncological patients, their ratios and their role in pain resistance.
authors.affiliation: Department of Biochemistry, National Cancer Institute, Slovakia.
authors.forename: J
authors.initials: J
authors.lastname: Netriova
authors.forename: E
authors.initials: E
authors.lastname: Blahova
authors.forename: Z
authors.initials: Z
authors.lastname: Johanesova
authors.forename: E
authors.initials: E
authors.lastname: Brandsteterova
authors.forename: J
authors.initials: J
authors.lastname: Lehotay
authors.forename: K
authors.initials: K
authors.lastname: Serdt
authors.forename: J
authors.initials: J
authors.lastname: Mocak
mesh_terms: D000328:Adult; D000368:Aged; D000701:Analgesics, Opioid / Q000097:blood* / Q000627:therapeutic use; D001711:Biotransformation; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000097:blood* / Q000627:therapeutic use; D009022:Morphine Derivatives / Q000097:blood*; D009369:Neoplasms / Q000097:blood* / Q000150:complications; D010148:Intractable Pain / Q000188:drug therapy / Q000209:etiology; D012727:Sex Characteristics; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000701:Analgesics, Opioid; D009022:Morphine Derivatives; C035349:morphine-6-glucuronide; D009020:Morphine; C018108:morphine-3-glucuronide