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Exosomal miR-214 from endometrial stromal cells inhibits endometriosis fibrosis.
Mol Hum Reprod. 2018 07 01; 24(7):357-365.MH

Abstract

STUDY QUESTION

Is it possible to improve fibrosis in endometriosis by microRNA-214 delivery in exosomes?

SUMMARY ANSWER

Upregulation of miR-214 may inhibit fibrogenesis and its delivery by exosomes derived from ectopic endometrial stromal cells (ESCs), offers an alternative therapeutic approach for endometriosis fibrosis.

WHAT IS KNOWN ALREADY

Fibrosis is the primary pathological feature of endometriosis. MiR-214 plays an important role in fibrotic disease. Connective tissue growth factor (CTGF) is a critical fibrogenic mediator of miR-214. The expression of miR-214 is decreased in ectopic ESCs compared with normal ESCs. miRNAs are a natural cargo of exosomes and these could be exploited as carriers of miRNA in replacement therapy.

STUDY DESIGN, SIZE, DURATION

Paired eutopic and ectopic endometrial tissue samples were obtained from 10 women with ovarian endometrioma. ESCs and epithelial cells from both were cultured in vitro. RT-PCR, western blot and immunohistochemistry were used to study the effect of transfection with miR-214 mimics on CTGF expression and fibrogenesis respectively, with and without TGFβ stimulation. Exosomes were isolated from ectopic ESCs and Endometrioma tissue was isolated from four patients, dispersed an injected (ip) into nude mice and allowed to implant. The mice were treated with miR-214-enriched exosomes or controls to confirm the effect of inhibiting CTGF overexpression on endometriosis fibrosis.

PARTICIPANTS/MATERIALS, SETTING, METHODS

The primary ectopic ESCs were transfected with miR-214 mimics. The levels of miR-214, CTGF and fibrotic markers were measured by RT-PCR and Immunohistochemistry. A mouse model of endometriosis was established by ip injection of human ectopic endometrial tissues into nude mice. MiR-214-enriched exosomes were injected into the mice and endometriotic lesions were measured on Day 28. Changes in fibrosis of the endometriotic implants were studied by histopathological staining.

MAIN RESULTS AND THE ROLE OF CHANCE

CTGF and fibrotic markers upregulation in endometriosis is associated with a reciprocal down-regulation of miR-214. By using miR-214 mimics and antagomirs to investigate expression of fibrotic markers, we found that increased production of miR-214 reduced Collagen αI and CTGF expression in endometriosis stromal and endometrial epithelial cells in response to fibrosis-inducing stimuli (P < 0.001 versus non-treatment). Ectopic ESCs yielded nano-sized exosomes which expressed miR-214. Loading exosomes with miR-214 mimics and injecting them into an experimental endometriosis mouse model resulted in a decrease in the expression of fibrosis-associated proteins (P < 0.001 versus PBS control group).

LARGE SCALE DATA

N/A.

LIMITATIONS, REASONS FOR CAUTION

We only isolated exosomes from ectopic ESCs, whether this is the optimum source requires further study.

WIDER IMPLICATIONS OF THE FINDINGS

Upregulation of miRNA-214 potentially offers an alternative therapeutic approach for endometriosis fibrosis.

STUDY FUNDING/COMPETING INTEREST(S)

This work was supported by grants from the National Natural Science Foundation of China (Grant no. 81771549 Jinwei Miao). The authors declare that there is no conflict of interest.

Authors+Show Affiliations

Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 251, Yaojiayuan Road, Chaoyang District, Beijing, China.Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 251, Yaojiayuan Road, Chaoyang District, Beijing, China.Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 251, Yaojiayuan Road, Chaoyang District, Beijing, China.Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 251, Yaojiayuan Road, Chaoyang District, Beijing, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29660008

Citation

Wu, Di, et al. "Exosomal miR-214 From Endometrial Stromal Cells Inhibits Endometriosis Fibrosis." Molecular Human Reproduction, vol. 24, no. 7, 2018, pp. 357-365.
Wu D, Lu P, Mi X, et al. Exosomal miR-214 from endometrial stromal cells inhibits endometriosis fibrosis. Mol Hum Reprod. 2018;24(7):357-365.
Wu, D., Lu, P., Mi, X., & Miao, J. (2018). Exosomal miR-214 from endometrial stromal cells inhibits endometriosis fibrosis. Molecular Human Reproduction, 24(7), 357-365. https://doi.org/10.1093/molehr/gay019
Wu D, et al. Exosomal miR-214 From Endometrial Stromal Cells Inhibits Endometriosis Fibrosis. Mol Hum Reprod. 2018 07 1;24(7):357-365. PubMed PMID: 29660008.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Exosomal miR-214 from endometrial stromal cells inhibits endometriosis fibrosis. AU - Wu,Di, AU - Lu,Pan, AU - Mi,Xue, AU - Miao,Jinwei, PY - 2017/11/06/received PY - 2018/04/09/accepted PY - 2018/4/17/pubmed PY - 2019/6/19/medline PY - 2018/4/17/entrez SP - 357 EP - 365 JF - Molecular human reproduction JO - Mol. Hum. Reprod. VL - 24 IS - 7 N2 - STUDY QUESTION: Is it possible to improve fibrosis in endometriosis by microRNA-214 delivery in exosomes? SUMMARY ANSWER: Upregulation of miR-214 may inhibit fibrogenesis and its delivery by exosomes derived from ectopic endometrial stromal cells (ESCs), offers an alternative therapeutic approach for endometriosis fibrosis. WHAT IS KNOWN ALREADY: Fibrosis is the primary pathological feature of endometriosis. MiR-214 plays an important role in fibrotic disease. Connective tissue growth factor (CTGF) is a critical fibrogenic mediator of miR-214. The expression of miR-214 is decreased in ectopic ESCs compared with normal ESCs. miRNAs are a natural cargo of exosomes and these could be exploited as carriers of miRNA in replacement therapy. STUDY DESIGN, SIZE, DURATION: Paired eutopic and ectopic endometrial tissue samples were obtained from 10 women with ovarian endometrioma. ESCs and epithelial cells from both were cultured in vitro. RT-PCR, western blot and immunohistochemistry were used to study the effect of transfection with miR-214 mimics on CTGF expression and fibrogenesis respectively, with and without TGFβ stimulation. Exosomes were isolated from ectopic ESCs and Endometrioma tissue was isolated from four patients, dispersed an injected (ip) into nude mice and allowed to implant. The mice were treated with miR-214-enriched exosomes or controls to confirm the effect of inhibiting CTGF overexpression on endometriosis fibrosis. PARTICIPANTS/MATERIALS, SETTING, METHODS: The primary ectopic ESCs were transfected with miR-214 mimics. The levels of miR-214, CTGF and fibrotic markers were measured by RT-PCR and Immunohistochemistry. A mouse model of endometriosis was established by ip injection of human ectopic endometrial tissues into nude mice. MiR-214-enriched exosomes were injected into the mice and endometriotic lesions were measured on Day 28. Changes in fibrosis of the endometriotic implants were studied by histopathological staining. MAIN RESULTS AND THE ROLE OF CHANCE: CTGF and fibrotic markers upregulation in endometriosis is associated with a reciprocal down-regulation of miR-214. By using miR-214 mimics and antagomirs to investigate expression of fibrotic markers, we found that increased production of miR-214 reduced Collagen αI and CTGF expression in endometriosis stromal and endometrial epithelial cells in response to fibrosis-inducing stimuli (P < 0.001 versus non-treatment). Ectopic ESCs yielded nano-sized exosomes which expressed miR-214. Loading exosomes with miR-214 mimics and injecting them into an experimental endometriosis mouse model resulted in a decrease in the expression of fibrosis-associated proteins (P < 0.001 versus PBS control group). LARGE SCALE DATA: N/A. LIMITATIONS, REASONS FOR CAUTION: We only isolated exosomes from ectopic ESCs, whether this is the optimum source requires further study. WIDER IMPLICATIONS OF THE FINDINGS: Upregulation of miRNA-214 potentially offers an alternative therapeutic approach for endometriosis fibrosis. STUDY FUNDING/COMPETING INTEREST(S): This work was supported by grants from the National Natural Science Foundation of China (Grant no. 81771549 Jinwei Miao). The authors declare that there is no conflict of interest. SN - 1460-2407 UR - https://www.unboundmedicine.com/medline/citation/29660008/Exosomal_miR_214_from_endometrial_stromal_cells_inhibits_endometriosis_fibrosis_ L2 - https://academic.oup.com/molehr/article-lookup/doi/10.1093/molehr/gay019 DB - PRIME DP - Unbound Medicine ER -