Abstract
It has been long-known that endometrium-secreted cytokines play a critical role during embryo implantation. However, whether cytokines secreted from the embryo are relevant to the process of embryo implantation remains unclear. The concentration of cytokines in embryo culture medium was tested using a newly developed, high-sensitivity single-cell proteomic platform and evaluated in comparison to embryo quality and clinical outcome. The effect of TNF-α on embryo and endometrium Ishikawa cells was investigated using immunofluorescence staining, CCK-8 assay, TUNEL staining, and RT-qPCR. Of the 10 cytokines measured, only TNF-α concentration was significantly higher in the group with embryo implantation failure. Immunofluorescence staining showed that the expression of TNF-α was unevenly distributed in blastocysts, and the expression level was significantly correlated with the blastocyst inner cell mass (ICM) quality score. Gene profiling showed that addition of TNF-α led to increased expression of tumor necrosis factor receptor 1 (TNFR1) and apoptosis-related genes and that this could be inhibited by the TNF-α receptor inhibitor etanercept (ETA). In addition, an increased expression of water and ion channels, including AQP3, CFTR, ENaCA, and CRISP2 was also observed which could also be inhibited by ETA. Our results show that higher embryo-secreted TNF-α levels are associated with implantation failure through activation of TNF-α receptor, and TNF-α may be an independent predictor for pre-transfer assessment of the embryo development potential in IVF patients.
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16 February 2022
A Correction to this paper has been published: https://doi.org/10.1007/s43032-022-00886-2
Abbreviations
- TNF-α:
-
tumor necrosis factor alpha
- ICM:
-
blastocysts inner cell mass
- TM:
-
trophectoderm of the embryo
- ETA:
-
etanercept
- TNFR1:
-
tumor necrosis factor receptor 1
- TNFR2:
-
tumor necrosis factor receptor 2
- CFTR:
-
cystic fibrosis transmembrane conductance regulator
- ENaCA:
-
epithelial Na (+) channel subunit alpha
- AQP3:
-
aquaporin-3
- CRISP2:
-
cysteine-rich secretory protein 2
- LIF:
-
leukemia inhibitory factor
- CRYBB2:
-
beta-crystallin B2
- Th1/2:
-
helper T cells 1/2
- IL-1β:
-
interleukin-1 beta
- IL-6:
-
interleukin-6
- IL-8:
-
interleukin-8
- IL-10:
-
interleukin-10
- MCP1:
-
monocyte chemotactic protein 1
- MIP-1α:
-
macrophage inflammatory protein 1-alpha
- MIP-1β:
-
macrophage inflammatory protein 1-beta
- RANTES:
-
C-C motif chemokine 5, T-cell-specific protein
- GM-CSF:
-
granulocyte-macrophage colony-stimulating factor
- NF-κB:
-
nuclear factor of kappa light polypeptide gene enhancer in B-cells 3
- IVF:
-
in vitro fertilization
- ICSI:
-
intracytoplasmic sperm injection
- ART:
-
assisted reproductive technology
- ROC:
-
receiver operating characteristic curve
- PCOS:
-
polycystic ovary syndrome
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Acknowledgements
We thank AIVFO (Inc., Chengdu, China) for providing technical support. Especially, we grateful for the technical assistance provided by Zhang Jie and Bo Lin in Histology and Imaging Platform, Core Facilities of West China Hospital, Sichuan University.
Funding
This work was supported by the National Key Research and Development Program of China (2018YFC1002804), Scientific and Translational Research Fund of Sichuan Provincial Department of Science and Technology (2017YSZH0032), the Key Research and Development Support Program of Chengdu (2019-YF05-00017-SN), and the Natural Sciences Foundation of China (81901435).
Availability of Supporting Data
The dataset used and/or analyzed during the current study is available from the corresponding author upon reasonable request. Registry data are available publicly (see references).
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WX and MZ developed the concept of the study; all authors contributed to data accumulation; JL and XS contributed to data analysis; all authors contributed to data interpretation. JL and WX wrote the manuscript. All authors contributed to revisions of the manuscript and approved the final submission. JL had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
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The Second Affiliated Hospital of Chengdu University of Traditional Chinese Medicine Ethics Committee; approval number: 2017–01. Participants provided consent to participate in this study.
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Lv, J., Shan, X., Yang, H. et al. Single Cell Proteomics Profiling Reveals That Embryo-Secreted TNF-α Plays a Critical Role During Embryo Implantation to the Endometrium. Reprod. Sci. 29, 1608–1617 (2022). https://doi.org/10.1007/s43032-021-00833-7
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DOI: https://doi.org/10.1007/s43032-021-00833-7