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PAPER SELECTED

Alkaline-Phosphatase in the Puerperium of Ewes and Its Relation to Thyroid-Hormones and Ovarian-Steroids

BEKEOVA E, KRAJNICAKOVA M, HENDRICHOVSKY V, MARACEK I
Veterinarni Medicina 38, 1993, 359-368

Triacylglycerols as the sources of cholesterol, the primary precursor of steroid synthesis, are one of the factors that limit the speed of steroidogenesis. Synthesis and resynthesis of triacylglycerols depend, in addition to other factors, on phosphatid hydrolysis that is controlled during pregnancy by placentary ALP (S u m i k a w a et al., 1987) and the FFA pool in the systemic blood stream. Enzymes participating in FFA release from the fat tissue are affected by thyroid hormones and TSH (M a y e s , 1977). In view of the above facts, this work was aimed at the observation of changes in alkaline phosphatase (ALP), thyroxine (T4), triiodothyronine (T3),17 beta-oestradiol (E2) and progesterone (P4) levels and their mutual correlations in the systemic blood stream of sheep from the first day after parturition to day 51 p.p. Our attention was paid to the possible delayed effects of placentary ALP and thyroid hormones on the synthesis of ovarian steroids in puerperal ewes. Nine merino sheep were included in the experiment


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