AI Article Synopsis
- HO-1 (Heme Oxygenase-1) offers protection against testicular ischaemia/reperfusion (I/R) injury, though its mechanisms are not well understood.
- In this study, researchers created HO-1 knockout rats to investigate the gene's role in testicular I/R injury, using various experimental techniques, including immunofluorescence and gene sequencing.
- The findings revealed that HO-1 mitigates pathological damage from I/R, promotes nuclear translocation, and interacts with specific miRNAs and genes like c-Jun, demonstrating its importance in testicular protection.
Article Abstract
Aims: Heme oxygenase (HO-1) affords protection against ischaemia/reperfusion (I/R) injury; however, its effects on testicular I/R injury remain poorly explored. Herein, we aimed to examine the effects of HO-1 on testicular I/R injury and elucidate the underlying mechanism.
Methods: Using the TALEN technique, we knocked out the HO-1 gene from rats. : Thirty hmox+/+ and 30 hmox-/- rats were randomly assigned to six groups: sham-operated (sham), I/R (the left testicle torsion/detorsion) 0 d,I/R 1d, I/R 3d, I/R 7d and I/R 28d. : GC-1 were suffered from: control,H/R (oxygen-deprivation/reoxygenation),H/R + HO-1 siRNA,H/R + c-Jun siRNA or H/R + HO-1 siRNA + c-jun.We performed immunofluorescence and immunohistochemistry experiments to detect HO-1 nuclear translocation. Flow cytometry was used to detect cell apoptosis and analyse the cell cycle. High-resolution miRNA, mRNA sequencing, reverse transcription-quantitative PCR, and western blotting were performed to identify testicular I/R injury-related genes strongly conserved in HO-1 knockout rats. A double luciferase reporter assay was performed to verify the relationship between C-jun and miR-221/222.
Main Findings: HO-1 improved the pathological damage induced by testicular I/R. In GC-1 cells, we confirmed the nuclear translocation of HO-1 and its protective effect against hypoxia/reoxygenation (H/R) damage. Accordingly, HO-1 protein itself, rather than heme metabolites, might play a key role in testicular I/R. Gene sequencing was performed to screen for miR221/222 and its downstream gene, thymocyte selection-associated high mobility group box (TOX). HO-1 increased c-Jun phosphorylation in the H/R group, knocked down c-Jun in GC-1 cells, and decreased miR-221/222 expression. Inhibition of HO-1 expression decreased the expression of c-Jun and miR-221/222, which was rescued by adding c-Jun. Dual-luciferase reporter assay confirmed the interaction between c-Jun and miR-221/222.
Conclusions: HO-1 could exert a protective effect against testicular I/R via the phosphorylated c-Jun-miR-221/222-TOX pathway.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10839873 | PMC |
| http://dx.doi.org/10.1016/j.heliyon.2024.e24579 | DOI Listing |
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