Bone marrow-derived progenitors become decidual cells and are essential for implantation and pregnancy maintenance
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA413977 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR6160580.fastq.gz | Fastqsanger.gz | |||
| SRR6160581.fastq.gz | Fastqsanger.gz | |||
| SRR6160582.fastq.gz | Fastqsanger.gz | |||
| SRR6160583.fastq.gz | Fastqsanger.gz |
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Project description:The pregnant decidua is infiltrated by many immune cells which are thought to originate in the bone marrow (BM) promoting pregnancy. In addition, BM-derived progenitor cells (BMDPCs) become non-hematopoietic endometrial cells. However, whether BMDPCs become non-immune decidual cells and their functional contribution to pregnancy were previously unknown. Here, we show that embryo implantation stimulates vast BMDPCs recruitment to decidua, where BMDPCs differentiate into non-hematopoietic stromal decidual cells. In addition, to determine the functional importance of BMDPCs to pregnancy, we used mice with endometrial stromal-specific defects precluding successful pregnancy. BM transplant (BMT) from wild-type (WT) into Hoxa11-/- mice, which lack decidualization, results in uterine transcriptional changes leading to stromal expansion, gland formation, and marked decidualization otherwise absent in Hoxa11-/- mice. By contrast, BMT from Hoxa11-/- into WT mice induces pregnancy loss. Importantly, in Hoxa11+/- mice, which have increased pregnancy losses, BMT from WT donors leads to normalized expression of numerous decidualization-related genes and rescue of pregnancy loss. Collectively, these findings reveal that BMDPCs have a novel non-hematopoietic physiologic contribution to decidual stroma, thereby playing indispensable roles in pregnancy establishment and maintenance.
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Project description:Bone marrow (BM)-derived progenitor cells (BMDPCs) are known to migrate and give rise to endometrial cells however their functional contribution to implantation and pregnancy are unknown . Here we show that implantation and pregnancy are strong stimuli for BMDPCs recruitment to the uterine decidua where BMDPCs differentiate into functional non-hematopoietic prolactin-producing decidual cells. Transcriptome analysis of implantation sites demonstrated that Hoxa11+/- mice transplanted with WT BM clustered hierarchically more closely with normal WT mice than with control Hoxa11+/- mice, showing normalized expression of numerous implantation-related genes. These findings reveal that BMDPCs have a major non-hematopoietic physiologic contribution to the decidual stroma, and thereby play an essential and previously unproven role in the establishment and maintenance of pregnancy.
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Project description:Polymorphonuclear myeloid-derived suppressor cell (PMN-MDSC) accumulate in maternal-fetal interface during pregnancy and play a role in maintenance of immune tolerance. Decreased PMN-MDSC is associated with pregnancy complications such as unexplained recurrent pregnancy loss (URPL). Whether PMN-MDSC function is different between normal pregnancy (NP) and URPL remains unexplored. Here we performed whole genome expression profile of 3 decidual PMN-MDSC from normal early pregnancy and 3 decidual PMN-MDSC from URPL. Total RNA were extracted. Cy5-labeled aRNA was hybridized and scanned on a G2505C Agilent Microarray Scanner with Agilent 0.1 XDR software. The gene expression pattern of the PMN-MDSC was significantly different between the NP group and the URPL group.
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Project description:Macrophages are abundant in uterine mucosa during the peri-implantation phase and early pregnancy. Decidual macrophages display dynamic changes alone with pregnancy progress: During the peri-implantation phase, macrophages displayed a pro-inflammatory phenotype which facilitates embryo implantation. While, In the late firster trimester and second trimester, decidual macrophages are anti-proinflammatory which are helpful to pregnancy maintenance. Alterations in the ratio of pro-inflammatory/anti-inflammatory decidual macrophages lead to abortion, preeclampsia, and preterm birth. Placenta-derived exosomes (pEXO) are critical in the immune cell modulation such as T cell apoptosis, NK activities, and T regulatory (Treg) differentiation. However, it is unknown whether placenta-derived exosomes contribute to decidual macrophage polarization during early pregnancy. Here we report that exosomes from the placenta explant stimulate M2 macrophage polarization via exosomal miRNA-30d-5p. Mechanistically, miRNA-30d-5p polarized macrophages to M2 phenotype by inhibiting HDAC9 expression. Furthermore, the conditioned medium of pEXO-treated macrophages promoted trophoblast migration and invasion. By contrast, conditioned medium impaired the ability of endothelial cell tube formation. However, pEXO-treated macrophages have no impact on T cell proliferation. Together, we demonstrated that pEXO promoted trophoblast migration and invasion, endothelial cell migration, and attenuation of endothelial cell tube formation by polarizing macrophage to decidua-like macrophage.
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Project description:Endometrial decidualization connecting embryo implantation and placentation is transient, but essential for successful pregnancy, which however is not systematically investigated. Here, by using a novel single-cell spatial transcriptomic profiling technology (scStereo-seq), we were able to visualize and define key and dynamic functional decidual hubs assembled by distinct immune, endothelial, trophoblast and decidual stromal cells (DSCs) during early pregnancy in mice. We classified DSC subclusters and described their transdifferentiation trajectory controlled by transcription factor cascades. Interestingly, we discovered a novel type of DSCs expressing immune cell-specific genes, termed immune DSCs (iDSCs). Whereas immature DSCs attracted immune cells and induced decidual angiogenesis at the mesenchymal-to-epithelial transition (MET) hub during decidualization initiation, iDSCs enabled immune cell recruitment, angiogenesis facilitation and cytotoxic effect induction to form immune cell assembling and angiogenesis hubs, which eventually allow decidual homeostasis maintenance and decidualization-to-placentation transition. We spatiotemporally decode mouse early pregnancy events controlled by immune DSCs.
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