Notch1 mediates uterine stromal differentiation and is critical for complete decidualization in the mouse

ABSTRACT Uterine receptivity implies a dialogue between the hormonally primed maternal endometrium and the free‐floating blastocyst. Endometrial stromal cells proliferate, avert apoptosis, and undergo decidualization in preparation for implantation; however, the molecular mechanisms that underlie di...

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Veröffentlicht in:The FASEB journal 2012-01, Vol.26 (1), p.282-294
Hauptverfasser: Afshar, Yalda, Jeong, Jae‐Wook, Roqueiro, Damian, DeMayo, Franco, Lydon, John, Radtke, Freddy, Radnor, Rachel, Miele, Lucio, Fazleabas, Asgerally
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container_end_page 294
container_issue 1
container_start_page 282
container_title The FASEB journal
container_volume 26
creator Afshar, Yalda
Jeong, Jae‐Wook
Roqueiro, Damian
DeMayo, Franco
Lydon, John
Radtke, Freddy
Radnor, Rachel
Miele, Lucio
Fazleabas, Asgerally
description ABSTRACT Uterine receptivity implies a dialogue between the hormonally primed maternal endometrium and the free‐floating blastocyst. Endometrial stromal cells proliferate, avert apoptosis, and undergo decidualization in preparation for implantation; however, the molecular mechanisms that underlie differentiation into the decidual phenotype remain largely undefined. The Notch family of transmembrane receptors transduce extracellular signals responsible for cell survival, cell‐to‐cell communication, and differentiation, all fundamental processes for decidualization and pregnancy. Using a murine artificial decidualization model, pharmacological inhibition of Notch signaling by γ‐secretase inhibition resulted in a significantly decreased deciduoma. Furthermore, a progesterone receptor (PR)‐Cre Notch1 bigenic (Notch1d/d) confirmed a Notch1‐dependent hypomorphic decidual phenotype. Microarray and pathway analysis, following Notch1 ablation, demonstrated significantly altered signaling repertoire. Concomitantly, hierarchical clustering demonstrated Notch1‐dependent differences in gene expression. Uteri deprived of Notch1 signaling demonstrated decreased cellular proliferation; namely, reduced proliferation‐specific antigen, Ki67, altered p21, cdk6, and cyclinD activity and an increased apoptotic‐profile, cleaved caspase‐3, Bad, and attenuated Bcl2. The results demonstrate that the preimplantation uterus relies on Notch signaling to inhibit apoptosis of stromal fibroblasts and regulate cell cycle progression, which together promotes successful decidualization. In summary, Notch1 signaling modulates multiple signaling mechanisms crucial for decidualization and these studies provide additional perspectives to the coordination of multiple signaling modalities required during decidualization.—Afshar, Y., Jeong, J.‐W., Roqueiro, D., DeMayo, F., Lydon, J., Radtke, F., Radnor, R., Miele, L., Fazleabas, A. Notch1 mediates uterine stromal differentiation and is critical for complete decidualization in the mouse. FASEB J. 26, 282–294 (2012). www.fasebj.org
doi_str_mv 10.1096/fj.11-184663
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Uteri deprived of Notch1 signaling demonstrated decreased cellular proliferation; namely, reduced proliferation‐specific antigen, Ki67, altered p21, cdk6, and cyclinD activity and an increased apoptotic‐profile, cleaved caspase‐3, Bad, and attenuated Bcl2. The results demonstrate that the preimplantation uterus relies on Notch signaling to inhibit apoptosis of stromal fibroblasts and regulate cell cycle progression, which together promotes successful decidualization. In summary, Notch1 signaling modulates multiple signaling mechanisms crucial for decidualization and these studies provide additional perspectives to the coordination of multiple signaling modalities required during decidualization.—Afshar, Y., Jeong, J.‐W., Roqueiro, D., DeMayo, F., Lydon, J., Radtke, F., Radnor, R., Miele, L., Fazleabas, A. Notch1 mediates uterine stromal differentiation and is critical for complete decidualization in the mouse. 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subjects Animals
Apoptosis - physiology
Cell Communication - physiology
Cell Differentiation - physiology
Cell Division - physiology
Cytoskeleton - metabolism
Decidua - cytology
Decidua - physiology
Embryo Implantation - physiology
endometrium
Female
implantation
Key Words
Mice
Mice, Inbred C57BL
Mice, Knockout
Oligonucleotide Array Sequence Analysis
Ovariectomy
Pregnancy
Pregnancy, Animal - physiology
Receptor, Notch1 - genetics
Receptor, Notch1 - metabolism
reproduction
Research Communications
Signal Transduction - physiology
Stromal Cells - cytology
Stromal Cells - metabolism
title Notch1 mediates uterine stromal differentiation and is critical for complete decidualization in the mouse
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