Biol Reprod 2009 SSR Annual Meeting Abstracts
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Biology of Reproduction, Vol 44, 906-912, Copyright © 1991 by Society for the Study of Reproduction

ARTICLES

Colony-stimulating factor-1 blocks early pregnancy in mice

B Tartakovsky, O Goldstein and N Brosh
Department of Chemical Immunology, Weizmann Institute of Science, Rehovot, Israel.

To elucidate the mechanisms underlying the suspected immune-related pregnancy failures in humans, we established experimental systems to induce pregnancy blocking and abortion in mice. One system, based on the preimmunization of C57BL/6J females with a syngeneic regressor tumor, is described. Such females fail to develop normal gestations when mated to C57BL/6J x DBA/2 F-1 (B6D2F-1) males or DBA/2 males but sustain normal pregnancies when impregnated by CBA/J or C57BL/6 males. An investigation into the cause of these male-specific pregnancy failures led us to identify colony-stimulating factor-1 (CSF-1) as responsible for both pregnancy-block and resorption of embryos. Indeed, injection of very small amounts of CSF-1 into plugged females, for the first 5 days of pregnancy, was sufficient to block B6D2F-1-induced gestations but had no effect on CBA/J-mated females. It also induced a high rate of fetal resorptions in the sensitive mating. These results suggest a novel mechanism underlying pregnancy failures: a mechanism based on cytokines and their effect on early embryonic development in certain mating combinations.


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Copyright © 1991 by the Society for the Study of Reproduction.