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- W2006540766 abstract "Urinary leukotriene E4 (LTE4) has been used as an index of total leukotriene synthesis. A wide variety of methods have been applied to measure LTE4 which has made direct comparison of urinary levels reported by different laboratories difficult. A new peptidoleukotriene immunoaffinity resin was utilized for urinary LTE4 purification in a method that is easy and inexpensive, utilizing commercially available reagents. This method is described and compared to other methods. LTE4 (50–250 pg/mL) added to a urine extract was quantitatively recovered using the immunoaffinity resin. Similarly, LTE4 (50–400 pg/mL) added to urine was recovered between 63 and 76%. The coefficient of variation of samples purified and quantified on the same or on different days ranged from 8–10%. There was a strong correlation (r2 = 0.95) between LTE4 concentrations determined after immunofiltration and immunoaffinity purification. Although there was a good correlation between urinary LTE4 levels measured without purification compared to after immunoaffinity purification, the high y-intercept of 179 indicates the presence of interfering substances in unpurified urine. Urinary LTE4 in normal healthy adults was 80 ± 7 pg/mg creatinine, similar to that previously reported following HPLC or immunofiltration purification. Urinary LTE4 was also measured in healthy children (age 3–12) and found to be 103 ± 9." @default.
- W2006540766 created "2016-06-24" @default.
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- W2006540766 date "1998-04-01" @default.
- W2006540766 modified "2023-09-23" @default.
- W2006540766 title "Immunoaffinity Resin for Purification of Urinary Leukotriene E4" @default.
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- W2006540766 doi "https://doi.org/10.1016/s0090-6980(98)00027-6" @default.
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