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Reproductive Immunology

Fetal and maternal TGF-beta 1 may combine to maintain pregnancy in mice

Published in Women's Health Weekly, July 29th, 2004

Interacting fetal and maternal transforming growth factor-beta 1 may be one mechanism by which pregnancy is maintained, suggest results from a study in mice.

According to researchers at the University of Otago in New Zealand, "One of the mysteries of pregnancy is why a mother does not reject her fetuses. Cytokine-modulation of maternal-fetal interactions is likely to be important. However, mice deficient in transforming growth factor-beta1 (TGFbeta1) and other cytokines are able to breed, bringing this hypothesis into question.

"The phenotype of TGFbeta1 null-mutant mice varies with genetic background," said I.S. McLennan and colleagues.

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