Determination of urinary 8-epi-prostaglandin F(2alpha) using liquid chromatography-tandem mass spectrometry: increased excretion in diabetics.
Liquid chromatography-tandem mass spectrometry (LC/MS-MS) was applied to the quantitative analysis of urinary 8-epi-prostaglandin F(2alpha) (8-epi-PGF(2alpha)) level. 8-Epi-PGF(2alpha) and its internal standard, [(2)H(4)]-8-epi-PGF(2alpha), were extracted from urine by using a solid phase extraction cartridge and loaded to LC/MS-MS in selected reaction monitoring (SRM) mode. The standard curve showed good linearity in the range of 40 pg to 10 ng (r = 0. 997). The accuracy of the added 8-epi-PGF(2alpha) ranged from 96.8 to 104.9% with a mean +/- SD of 99.5+/-2.5%. The average level +/- SD of urinary 8-epi-PGF(2alpha) in 13 healthy volunteers (five women and eight men, 31+/-7.4 years old) was 429.4+/-149.6 pg/mg creatinine. The level of seven patients with noninsulin dependent diabetes mellitus (two women and five men, 40+/-13.6 years old), 630.9+/-275.6 pg/mg creatinine, was statistically higher than that of healthy volunteers (P<0.05). This finding suggested that diabetics are in a highly oxidative condition. This simple and rapid LC/MS-MS method can be used to elucidate the pathophysiological feature of diabetes or for monitoring the curative effect.
Murai
Y
Y
Department of Pharmaceutical Sciences, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, 980-8574, Sendai, Japan.
Hishinuma
T
T
Suzuki
N
N
Satoh
J
J
Toyota
T
T
Mizugaki
M
M
D000328:Adult; D002853:Chromatography, Liquid; D003404:Creatinine / Q000652:urine; D003924:Diabetes Mellitus, Type 2 / Q000652:urine*; D015237:Dinoprost / Q000031:analogs & derivatives* / Q000652:urine*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged; D012015:Reference Standards; D012907:Smoking / Q000652:urine
C075750:8-epi-prostaglandin F2alpha; D003404:Creatinine; D015237:Dinoprost