Human infertility and pregnancy loss represent major public health problems in women. Our long-range goal is to discover and understand the hormonal, cellular, and molecular mechanisms regulating uterine morphogenesis and adult function in order to provide fundamental information useful for prevention and clinical treatment of women's health problems. The success of developmental mechanisms regulating uterine morphogenesis dictates, in part, the embryotrophic potential and functional capacity of the adult uterus. In humans, uterine morphogenesis begins late in fetal life and is not completed until after birth, thereby precluding study of this critical process. Therefore, the proposed research will utilize mice as a model system to investigate genes governing uterine morphogenesis and function. The focus of this proposal is Wnt11, a gene that encodes a secreted glycoprotein that is expressed specifically in the epithelium of the developing and adult uterus. Genome-wide disruption of Wnt11 results in perinatal lethality. The central hypothesis is that Wnt11 is a critical regulator of postnatal uterine development and adult uterine function. In order to circumvent the perinatal lethality of Wnt11-null mice, we will conditionally ablate Wnt11 in the epithelium of the uterus after birth using the Cre/LoxP system and the innovative progesterone receptor-Cre knockin mouse model. The progesterone receptor is only expressed in the epithelium of the uterus after birth and is not expressed during M?llerian duct differentiation. The conditional mutant mice will be used to test our central hypothesis and understand the biological roles of Wnt11 in postnatal uterine development and adult uterine function. Accomplishment of these research goals is expected to significantly advance our understanding of the developmental aspects of uterine biology, determinants of adult uterine function, and provide a foundation for the design of clinical therapies to prevent, identify and treat human reproductive problems, such as infertility and pregnancy loss, due to uterine dysgenesis, dysplasia or dysfunction.

Public Health Relevance

This research will advance our understanding of the how the uterus develops. Abnormal development of the uterus can cause infertility and pregnancy loss in women. This research will help determine important genes for reproduction and help to design clinical therapies to prevent, identify and treat reproductive problems in women.

National Institute of Health (NIH)
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Small Research Grants (R03)
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Pediatrics Subcommittee (CHHD)
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Yoshinaga, Koji
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Southern Illinois University Carbondale
Schools of Medicine
United States
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Abedini, Atefeh; Zamberlam, Gustavo; Lapointe, Evelyne et al. (2016) WNT5a is required for normal ovarian follicle development and antagonizes gonadotropin responsiveness in granulosa cells by suppressing canonical WNT signaling. FASEB J 30:1534-47
Cooke, Paul S; Spencer, Thomas E; Bartol, Frank F et al. (2013) Uterine glands: development, function and experimental model systems. Mol Hum Reprod 19:547-58
Yoshioka, Shin; King, Mandy L; Ran, Sophia et al. (2012) WNT7A regulates tumor growth and progression in ovarian cancer through the WNT/?-catenin pathway. Mol Cancer Res 10:469-82