RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis
Abstract Objective As a common complication of coronary microembolization (CME), myocardial injury (MI) implies high mortality. Long non‐coding RNAs (lncRNAs) are rarely studied in CME‐induced MI. Herein, this study intended to evaluate the role of lncRNA Sox2 overlapping transcript (Sox2OT) in CME‐...
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | ESC Heart Failure |
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| Online Access: | https://doi.org/10.1002/ehf2.13814 |
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| author | Liying Xuan Danni Fu Dong Zhen Dongsong Bai Lijun Yu Guohua Gong |
| author_facet | Liying Xuan Danni Fu Dong Zhen Dongsong Bai Lijun Yu Guohua Gong |
| author_sort | Liying Xuan |
| collection | DOAJ |
| description | Abstract Objective As a common complication of coronary microembolization (CME), myocardial injury (MI) implies high mortality. Long non‐coding RNAs (lncRNAs) are rarely studied in CME‐induced MI. Herein, this study intended to evaluate the role of lncRNA Sox2 overlapping transcript (Sox2OT) in CME‐induced MI. Methods The CME rat models were successfully established by injection of microemboli. Rat cardiac functions and MI were observed by ultrasonic electrocardiogram, HE staining, and HBFP staining. Functional assays were utilized to test the inflammatory responses, oxidative stress, and pyroptosis using reverse transcription quantitative polymerase chain reaction, Western blotting, immunohistochemistry, immunofluorescence, and ELISA. Dual‐luciferase reporter gene assay and RNA immunoprecipitation were conducted to clarify the targeting relations between Sox2OT and microRNA (miRNA)‐23b and between miR‐23b and toll‐like receptor 4 (TLR4). Results Rat CME disrupted the cardiac functions and induced inflammatory responses and oxidative stress, and activated the nuclear factor‐kappa B (NF‐κB) pathway and pyroptosis (all P < 0.05). An NF‐κB inhibitor downregulated the NF‐κB pathway, reduced pyroptosis, and relieved cardiomyocyte injury and pyroptosis. Compared with the sham group (1.05 ± 0.32), lncRNA Sox2OT level (4.41 ± 0.67) in the CME group was elevated (P < 0.05). Sox2OT acted as a competitive endogenous RNA (ceRNA) of miR‐23b to regulate TLR4. Silencing of Sox2OT favoured miR‐23b binding to 3′UTR of TLR4 mRNA leading to suppressed TLR4‐mediated NFKB signalling and pyroptosis in myocardial tissues harvested from CME rat models. In addition, miR‐23b overexpression could supplement the cytosolic miR‐23b reserves to target TLR‐4 and partially reverse Sox2OT‐mediated pyroptosis in LPS‐treated H9C2 cells. Conclusions This study supported that silencing Sox2OT inhibited CME‐induced MI by eliminating Sox2OT/miR‐23b binding and down‐regulating the TLR4/NF‐κB pathway. This investigation may provide novel insights for the treatment of CME‐induced MI. |
| format | Article |
| id | doaj-art-25db9517a602494cb092f3c9116a7fd8 |
| institution | Kabale University |
| issn | 2055-5822 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | ESC Heart Failure |
| spelling | doaj-art-25db9517a602494cb092f3c9116a7fd82025-02-05T05:22:10ZengWileyESC Heart Failure2055-58222022-06-01931689170210.1002/ehf2.13814RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosisLiying Xuan0Danni Fu1Dong Zhen2Dongsong Bai3Lijun Yu4Guohua Gong5Medicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaMedicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaMedicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaMedicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaMedicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaMedicinal Chemistry and Pharmacology Institute Inner Mongolia University for Nationalities No. 1742 Holin River Street Tongliao Inner Mongolia 028002 ChinaAbstract Objective As a common complication of coronary microembolization (CME), myocardial injury (MI) implies high mortality. Long non‐coding RNAs (lncRNAs) are rarely studied in CME‐induced MI. Herein, this study intended to evaluate the role of lncRNA Sox2 overlapping transcript (Sox2OT) in CME‐induced MI. Methods The CME rat models were successfully established by injection of microemboli. Rat cardiac functions and MI were observed by ultrasonic electrocardiogram, HE staining, and HBFP staining. Functional assays were utilized to test the inflammatory responses, oxidative stress, and pyroptosis using reverse transcription quantitative polymerase chain reaction, Western blotting, immunohistochemistry, immunofluorescence, and ELISA. Dual‐luciferase reporter gene assay and RNA immunoprecipitation were conducted to clarify the targeting relations between Sox2OT and microRNA (miRNA)‐23b and between miR‐23b and toll‐like receptor 4 (TLR4). Results Rat CME disrupted the cardiac functions and induced inflammatory responses and oxidative stress, and activated the nuclear factor‐kappa B (NF‐κB) pathway and pyroptosis (all P < 0.05). An NF‐κB inhibitor downregulated the NF‐κB pathway, reduced pyroptosis, and relieved cardiomyocyte injury and pyroptosis. Compared with the sham group (1.05 ± 0.32), lncRNA Sox2OT level (4.41 ± 0.67) in the CME group was elevated (P < 0.05). Sox2OT acted as a competitive endogenous RNA (ceRNA) of miR‐23b to regulate TLR4. Silencing of Sox2OT favoured miR‐23b binding to 3′UTR of TLR4 mRNA leading to suppressed TLR4‐mediated NFKB signalling and pyroptosis in myocardial tissues harvested from CME rat models. In addition, miR‐23b overexpression could supplement the cytosolic miR‐23b reserves to target TLR‐4 and partially reverse Sox2OT‐mediated pyroptosis in LPS‐treated H9C2 cells. Conclusions This study supported that silencing Sox2OT inhibited CME‐induced MI by eliminating Sox2OT/miR‐23b binding and down‐regulating the TLR4/NF‐κB pathway. This investigation may provide novel insights for the treatment of CME‐induced MI.https://doi.org/10.1002/ehf2.13814Coronary microembolizationMyocardial injuryLong non‐coding RNA Sox2 overlapping transcriptmicroRNA‐23bTLR4NF‐κB |
| spellingShingle | Liying Xuan Danni Fu Dong Zhen Dongsong Bai Lijun Yu Guohua Gong RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis ESC Heart Failure Coronary microembolization Myocardial injury Long non‐coding RNA Sox2 overlapping transcript microRNA‐23b TLR4 NF‐κB |
| title | RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis |
| title_full | RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis |
| title_fullStr | RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis |
| title_full_unstemmed | RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis |
| title_short | RETRACTED: Long non‐coding RNA Sox2OT promotes coronary microembolization‐induced myocardial injury by mediating pyroptosis |
| title_sort | retracted long non coding rna sox2ot promotes coronary microembolization induced myocardial injury by mediating pyroptosis |
| topic | Coronary microembolization Myocardial injury Long non‐coding RNA Sox2 overlapping transcript microRNA‐23b TLR4 NF‐κB |
| url | https://doi.org/10.1002/ehf2.13814 |
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