1
|
Winship A, Ton A, Van Sinderen M, Menkhorst E, Rainczuk K, Griffiths M, Cuman C, Dimitriadis E. Mouse double minute homologue 2 (MDM2) downregulation by miR-661 impairs human endometrial epithelial cell adhesive capacity. Reprod Fertil Dev 2018; 30:477-486. [PMID: 28847363 DOI: 10.1071/rd17095] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 07/16/2017] [Indexed: 12/11/2022] Open
Abstract
Human blastocysts that fail to implant following IVF secrete elevated levels of miR-661, which is taken up by primary human endometrial epithelial cells (HEECs) and impairs their adhesive capability. MicroRNA miR-661 downregulates mouse double minute homologue 2 (MDM2) and MDM4 in other epithelial cell types to activate p53; however, this has not been examined in the endometrium. In this study MDM2 protein was detected in the luminal epithelium of the endometrium, the site of blastocyst attachment, during the mid secretory receptive phase of the menstrual cycle. The effects of miR-661 on gene expression in and adhesion of endometrial cells was also examined. MiR-661 overexpression consistently downregulated MDM2 but not MDM4 or p53 gene expression in the Ishikawa endometrial epithelial cell line and primary HEEC. Adhesion assays were performed on the real-time monitoring xCELLigence system and by co-culture using Ishikawa cells and HEECs with HTR8/SVneo trophoblast spheroids. Targeted siRNA-mediated knockdown of MDM2 in endometrial epithelial cells reduced Ishikawa cell adhesion (P<0.001) and also reduced HTR8/SVneo trophoblast spheroid adhesion to Ishikawa cells (P<0.05) and HEECs (P<0.05). MDM2 overexpression using recombinant protein treatment resulted in enhanced HTR8/SVneo trophoblast spheroid adhesion to Ishikawa cells (P<0.01) and HEECs (P<0.05). This study highlights a potential new mechanism by which human blastocyst-secreted miR-661 reduces endometrial epithelial cell adhesion; via downregulation of MDM2. These findings suggest that MDM2 contributes to endometrial-blastocyst adhesion, implantation and infertility in women.
Collapse
Affiliation(s)
- Amy Winship
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Amanda Ton
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Michelle Van Sinderen
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Ellen Menkhorst
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Katarzyna Rainczuk
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Meaghan Griffiths
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Carly Cuman
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| | - Evdokia Dimitriadis
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Vic. 3168, Australia
| |
Collapse
|
2
|
Winship A, Correia J, Zhang JG, Nicola NA, Dimitriadis E. Leukemia Inhibitory Factor (LIF) Inhibition during Mid-Gestation Impairs Trophoblast Invasion and Spiral Artery Remodelling during Pregnancy in Mice. PLoS One 2015; 10:e0129110. [PMID: 26479247 PMCID: PMC4610690 DOI: 10.1371/journal.pone.0129110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 05/06/2015] [Indexed: 11/24/2022] Open
Abstract
The placenta forms the interface between the maternal and fetal circulation and is critical for the establishment of a healthy pregnancy. Trophoblast cell proliferation, migration and invasion into the endometrium are fundamental events in the initiation of placentation. Leukemia inhibitory factor (LIF) has been shown to promote trophoblast invasion in vitro, however its precise role in trophoblast invasion in vivo is unknown. We hypothesized that LIF would be required for normal trophoblast invasion and spiral artery remodeling in mice. Both LIF and its receptor (LIFRα) co-localized with cytokeratin-positive invasive endovascular extravillous trophoblasts (EVT) in mouse implantation sites during mid-gestation. Temporally blocking LIF action during specific periods of placental development via administration of our unique LIFRα antagonist, PEGLA, resulted in abnormal trophoblast invasion and impaired spiral artery remodeling compared to PEG control. PEGLA-treated mouse decidual vessels were characterized by retention of α-smooth muscle actin (αSMA)-positive vascular smooth muscle cells (VSMCs), while PEG control decidual vessels were remodelled by cytokeratin-positive trophoblasts. LIF blockade did not alter F4/80-positive decidual macrophage numbers between treatment groups, but resulted in down-regulation of decidual transcript levels of monocyte chemoattractant protein-1 (MCP-1) and interleukin-10 (IL-10), which are important immune cell activation factors that promote spiral artery remodeling during pregnancy. Our data suggest that LIF plays an important role in trophoblast invasion in vivo and may facilitate trophoblast-decidual-immune cell cross talk to enable adequate spiral artery remodeling.
Collapse
Affiliation(s)
- Amy Winship
- The Hudson Institute, Melbourne, Australia
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia
| | | | - Jian-Guo Zhang
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- Department of Medical Biology, The University of Melbourne, Melbourne, Australia
| | - Nicos A. Nicola
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- Department of Medical Biology, The University of Melbourne, Melbourne, Australia
| | - Evdokia Dimitriadis
- The Hudson Institute, Melbourne, Australia
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia
| |
Collapse
|
3
|
Winship A, Correia J, Krishnan T, Menkhorst E, Cuman C, Zhang JG, Nicola NA, Dimitriadis E. Blocking Endogenous Leukemia Inhibitory Factor During Placental Development in Mice Leads to Abnormal Placentation and Pregnancy Loss. Sci Rep 2015; 5:13237. [PMID: 26272398 PMCID: PMC4536525 DOI: 10.1038/srep13237] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 06/11/2015] [Indexed: 12/26/2022] Open
Abstract
The placenta forms the interface between the maternal and fetal circulation and is critical for the establishment of a healthy pregnancy. Specialized trophoblast cells derived from the embryonic trophectoderm play a pivotal role in the establishment of the placenta. Leukemia inhibitory factor (LIF) is one of the predominant cytokines present in the placenta during early pregnancy. LIF has been shown to regulate trophoblast adhesion and invasion in vitro, however its precise role in vivo is unknown. We hypothesized that LIF would be required for normal placental development in mice. LIF and LIFRα were immunolocalized to placental trophoblasts and fetal vessels in mouse implantation sites during mid-gestation. Temporally blocking LIF action during specific periods of placental development via intraperitoneal administration of our specific LIFRα antagonist, PEGLA, resulted in abnormal placental trophoblast and vascular morphology and reduced activated STAT3 but not ERK. Numerous genes regulating angiogenesis and oxidative stress were altered in the placenta in response to LIF inhibition. Pregnancy viability was also significantly compromised in PEGLA treated mice. Our data suggest that LIF plays an important role in placentation in vivo and the maintenance of healthy pregnancy.
Collapse
Affiliation(s)
- Amy Winship
- 1] MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia [2] Department of Anatomy and Developmental Biology, Wellington Road, Monash University, Clayton, Victoria, 3800, Australia
| | - Jeanne Correia
- MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia
| | - Tara Krishnan
- 1] MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia [2] Faculty of Medicine, Nursing &Health Sciences, Wellington Road, Monash University, Clayton, Victoria, 3800, Australia
| | - Ellen Menkhorst
- MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia
| | - Carly Cuman
- MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia
| | - Jian-Guo Zhang
- 1] The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia [2] Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nicos A Nicola
- 1] The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia [2] Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Evdokia Dimitriadis
- 1] MIMR-PHI Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia [2] Department of Anatomy and Developmental Biology, Wellington Road, Monash University, Clayton, Victoria, 3800, Australia
| |
Collapse
|