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Journal of Translational Medicine
Published in: Journal of Translational Medicine 1/2024

Open Access 01-12-2024 | Endometriosis | Research

Multi-omics integration highlights the role of ubiquitination in endometriosis fibrosis

Authors: Mengjie Yang, Hong Jiang, Xinyu Ding, Lu Zhang, Huaying Zhang, Jiahao Chen, Lijun Li, Xinqin He, Zhixiong Huang, Qionghua Chen

Published in: Journal of Translational Medicine | Issue 1/2024

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Abstract

Background

Endometriosis, characterized by the presence of active endometrial-like tissues outside the uterus, causes symptoms like dysmenorrhea and infertility due to the fibrosis of endometrial cells, which involves excessive deposition of extracellular matrix (ECM) proteins. Ubiquitination, an important post-transcriptional modification, regulates various biological processes in human diseases. However, its role in the fibrosis process in endometriosis remains unclear.

Methods

We employed multi-omics approaches on two cohorts of endometriosis patients with 39 samples. GO terms and KEGG pathways enrichment analyses were used to investigate the functional changes involved in endometriosis. Pearson’s correlation coefficient analysis was conducted to explore the relationship between global proteome and ubiquitylome in endometriosis. The protein expression levels of ubiquitin-, fibrosis-related proteins, and E3 ubiquitin-protein ligase TRIM33 were validated via Western blot. Transfecting human endometrial stroma cells (hESCs) with TRIM33 small interfering RNA (siRNA) in vitro to explore how TRIM33 affects fibrosis-related proteins.

Results

Integration of proteomics and transcriptomics showed genes with concurrent change of both mRNA and protein level which involved in ECM production in ectopic endometria. Ubiquitylomics distinguished 1647 and 1698 ubiquitinated lysine sites in the ectopic (EC) group compared to the normal (NC) and eutopic (EU) groups, respectively. Further multi-omics integration highlighted the essential role of ubiquitination in key fibrosis regulators in endometriosis. Correlation analysis between proteome and ubiquitylome showed correlation coefficients of 0.32 and 0.36 for ubiquitinated fibrosis proteins in EC/NC and EC/EU groups, respectively, indicating positive regulation of fibrosis-related protein expression by ubiquitination in ectopic lesions. We identified ubiquitination in 41 pivotal proteins within the fibrosis-related pathway of endometriosis. Finally, the elevated expression of TGFBR1/α-SMA/FAP/FN1/Collagen1 proteins in EC tissues were validated across independent samples. More importantly, we demonstrated that both the mRNA and protein levels of TRIM33 were reduced in endometriotic tissues. Knockdown of TRIM33 promoted TGFBR1/p-SMAD2/α-SMA/FN1 protein expressions in hESCs but did not significantly affect Collagen1/FAP levels, suggesting its inhibitory effect on fibrosis in vitro.

Conclusions

This study, employing multi-omics approaches, provides novel insights into endometriosis ubiquitination profiles and reveals aberrant expression of the E3 ubiquitin ligase TRIM33 in endometriotic tissues, emphasizing their critical involvement in fibrosis pathogenesis and potential therapeutic targets.
Appendix
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Metadata
Title
Multi-omics integration highlights the role of ubiquitination in endometriosis fibrosis
Authors
Mengjie Yang
Hong Jiang
Xinyu Ding
Lu Zhang
Huaying Zhang
Jiahao Chen
Lijun Li
Xinqin He
Zhixiong Huang
Qionghua Chen
Publication date
01-12-2024
Publisher
BioMed Central
Keyword
Endometriosis
Published in
Journal of Translational Medicine / Issue 1/2024
Electronic ISSN: 1479-5876
DOI
https://doi.org/10.1186/s12967-024-05245-0

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