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- W2336654312 abstract "In patients with rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), 17beta-estradiol was thought to play a dual pro- and antiinflammatory role depending on its concentration or probably conversion to downstream mitogenic 16 alpha-hydroxyestrone or naturally occurring antiestrogens such as 2-hydroxyestrone. We compared renal excretion of these 2 types of estrogens in healthy subjects and patients with RA and SLE.In a prospective study with 30 patients with RA, 32 with SLE, and 54 healthy subjects, we measured urinary levels of 16 alpha-hydroxyestrone and 2-hydroxyestrogens by enzyme immunoassay. We studied renal excretion to estimate the time-integral of hormone production.Urinary concentration and total urinary loss of 2-hydroxyestrogens was 10 times higher in healthy subjects compared to patients with either SLE or RA irrespective of prior prednisolone treatment or sex. The urinary concentration and loss of 16 alpha-hydroxyestrone did not differ between healthy subjects and patients with RA/SLE. The ratio of urinary 16 alpha-hydroxyestrone/2-hydroxyestrogens was more than 20 times higher in RA and SLE than healthy subjects irrespective of prior glucocorticoid treatment or sex.This study in RA and SLE patients clearly demonstrates a large shift to mitogenic estrogens in relation to endogenous antiestrogens. Both steroids are converted from the precursor 17beta-estradiol and estrone. In patients with RA and SLE, the magnitude of conversion to the mitogenic 16 alpha-hydroxyestrone is greatly upregulated, which likely contributes to maintenance of the proliferative state in these diseases." @default.
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- W2336654312 date "2004-03-01" @default.
- W2336654312 modified "2023-09-23" @default.
- W2336654312 title "Patients with rheumatoid arthritis and systemic lupus erythematosus have increased renal excretion of mitogenic estrogens in relation to endogenous antiestrogens." @default.
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