TGF-β1 Neutralization Improves Pregnancy Outcomes by Restoring Endometrial Receptivity in Mice with Adenomyosis

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Anti-TGF-β1 treatment in a mouse model of adenomyosis improved implantation rates, birth outcomes, and pup survival by reducing collagen and increasing LIF expression, thereby restoring endometrial receptivity.

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This study investigated whether neutralizing transforming growth factor beta 1 (TGF-β1) could improve endometrial receptivity and pregnancy outcomes in a mouse model of adenomyosis. Adenomyosis was induced in ICR mice by tamoxifen gavage from postnatal days 1–4, after which mice received intrauterine anti-TGF-β1-neutralizing antibody (or isotype IgG/PBS) at postnatal day 42, and implantation metrics, live birth outcomes, pup survival, and uterine collagen and leukemia inhibitory factor (LIF) expression were assessed using histology and qRT-PCR/Western blot/IHC. Anti-TGF-β1 treatment increased implantation numbers, fecundity and live birth rates, and pup survival while reducing pup mortality after weaning, alongside attenuating uterine collagen and increasing LIF expression. A stated caveat is that the experiments were conducted in a TAM-induced mouse model. This paper is centrally about adenomyosis — it tests TGF-β1 neutralization to restore endometrial receptivity (via LIF) and improve pregnancy outcomes in adenomyosis mice.

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Abstract

The objective of this research is to study the effects of TGF-β1 inhibition on endometrial receptivity and pregnancy outcomes in mice with adenomyosis. Experiments were done using a mouse model of adenomyosis which took place in a hospital-affiliated laboratory. The mouse model used for this research is ICR mouse. Adenomyosis was induced by oral gavage of tamoxifen (TAM) from postnatal days (PNDs) 1 to 4 in ICR mice. Bilateral intrauterine injection of anti-TGF-β1-neutralizing antibody or isotype IgG or PBS was performed at PND42. The mice were then either sacrificed or mated at PND64 followed by sacrificing at gestational day (GD) 4 or proceeding to delivery. Implantation numbers, rate of dams with live birth, live birth numbers, survival at 1 week old, and pup mortality rate after weaning were recorded. Collagen was demonstrated by Masson’s trichrome and Van Gieson’s stains. Uterine expression of a receptivity marker, leukemia inhibitory factor (LIF), was examined by quantitative reverse transcription-polymerase chain reaction (qRT-PCR), Western blot, and immunohistochemistry (IHC). Anti-TGF-β1 treatment increased the mean implantation numbers, fecundity rate, the rate of dams with live birth, pup survival rate at 1 week old, and pup mortality rate after weaning. Collagen expression in uteri with adenomyosis was attenuated by anti-TGF-β1 treatment. Increased LIF expression by anti-TGF-β1 treatment was detected by qRT-PCR, Western blot, and IHC. The results suggest that inhibition of TGF-β1 improves pregnancy outcomes by restoring endometrial receptivity in mice with adenomyosis. Similar content being viewed by others

References

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Author information Authors and Affiliations Corresponding authors Ethics declarations The animal studies were conducted under the E-Da Hospital Institutional Animal Care and Use Committee approval (permit number: IACUC-105024). Conflict of Interest The authors declare that they have no conflict of interest. Additional information Publisher’s Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Rights and permissions About this article Cite this article Kay, N., Huang, CY., Shiu, LY. et al. TGF-β1 Neutralization Improves Pregnancy Outcomes by Restoring Endometrial Receptivity in Mice with Adenomyosis. Reprod. Sci. 28, 877–887 (2021). https://doi.org/10.1007/s43032-020-00308-1 Received: Accepted: Published: Version of record: Issue date: DOI: https://doi.org/10.1007/s43032-020-00308-1

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adenomyosis

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Adenomyosis Antibodies, Neutralizing Embryo Implantation Endometrium Infertility, Female Transforming Growth Factor beta1 Adenomyosis Adenomyosis Adenomyosis Adenomyosis Animals Antibodies, Neutralizing Collagen Collagen Disease Models, Animal Embryo Implantation Endometrium Endometrium Endometrium Female

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