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Journal of Endocrinology (1979) 83, 277-284    DOI: 10.1677/joe.0.0830277
© 1979 Society for Endocrinology

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INTERACTION BETWEEN THEOPHYLLINE AND OESTROGEN IN THE RAT UTERUS

J. STEINSAPIR, A. M. ROJAS, A. FERNÁNDEZ, M. ALBURQUERQUE, S. LEÓN, P. BUSTÓN, R. PACHECO, A. MUNIZAGA, L. HABASH, J. M. OJEDA and A. TCHERNITCHIN

Theophylline alone or in the presence of 0·001, 0·01, 0·1 or 1 µg oestradiol-17β/100 g body wt increased uterine RNA and protein content 6 h after administration. Uterine oedema induced by physiological doses of oestradiol-17β was increased further in the presence of theophylline.

Theophylline decreased the number of eosinophils in the blood and concurrently decreased oestrogen-induced uterine eosinophilia at doses of 0·01,0·1, 1,10 or 30 µg oestradiol-17β/100 g body wt. Oestrogen binding by uterine eosinophils in vitro increased in the presence of theophylline. This effect of theophylline could explain the increase of oestrogen-induced uterine oedema in vivo.







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Copyright © 1979 by the Society for Endocrinology.