Study of the luteinizing hormone-induced increase of ovarian blood flow during the estrous cycle in the rat.

@article{Varga1985StudyOT,
  title={Study of the luteinizing hormone-induced increase of ovarian blood flow during the estrous cycle in the rat.},
  author={Bertalan Varga and Edit Horvath and G. Folly and E Stark},
  journal={Biology of reproduction},
  year={1985},
  volume={32 3},
  pages={
          480-8
        }
}
CYF rats were anesthetized on various days of the 4-day cycle and blood samples were collected at 5-min interals from the ovarian vein before and after i.v. administration of 5 micrograms/100 g BW of luteinizing hormone (LH). Ovarian venous outflow, blood pressure and hematocrit were continuously recorded, and from the blood samples progesterone (P) and 17 beta-estradiol (E2) were determined by radioimmunoassay (RIA). Ovarian blood flow and P secretion showed a parallel increase on Day 1… 
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References

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TLDR
Ovarian blood flow was determined before and after a single intravenous injection of LH to anaesthetized, post-pubertal virgin rabbits, using 15 plus or minus 5 mum microspheres, labelled with Ytterbium-169 and Scandium-46 to study the mechanism of the LH induced ovarian vasodilatation.
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These experiments were designed to determine utero-ovarian vein blood flow and ovarian secretion rates and the ability of ACTH, LH, or FSH to modify these parameters in the cyclic hamster. Hamsters
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TLDR
The high level of ovarian blood flow and progesterone secretion in mid-pregnancy is suggested to be the result of the stimulation of luteotropic material originating from the placenta.
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TLDR
The results indicate that during the estrous cycle, OBF rates and serum E2 levels rise in a parallel manner, whereas during PSP, serum P levels and OBF are positively correlated.
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TLDR
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TLDR
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TLDR
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TLDR
The day 4 peak in E2 was temporally related to the preovulatory surge in LH and an abrupt increase in ovarian progesterone, whereas the addition of 5 μg of LH restored E2 to normal values.
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TLDR
Results indicate that LH acts at a step in the prostaglandin pathway after hydrolysis of arachidonic acid esters and produces an increase in prostag landin synthetase activity.
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TLDR
It is suggested that in dogs ACTH exerts its ovarian blood flow stimulatory effect by releasing PGE2 or some similar agent(s), and the effect of both agents can be characterized by a common equation.
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