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2 "Bei Liu"
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Basic Research
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Rbbp6-Mediated Bmal1 Ubiquitination Inhibits YAP1 Signaling Pathway to Promote Ferroptosis in Diabetes-Induced Testicular Damage
Yuan Tian, Zhiqiang Zhu, Jun Qiao, Bei Liu, Yuehai Xiao
Received March 1, 2024  Accepted June 17, 2024  Published online November 6, 2024  
DOI: https://doi.org/10.4093/dmj.2024.0099    [Epub ahead of print]
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  • 44 Download
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Diabetes-induced testicular damage (DITD) is a common complication of diabetes. We investigated underlying mechanism of retinoblastoma-binding protein 6 (Rbbp6)-mediated brain and muscle ARNT-like 1 (Bmal1) ubiquitination in modulating ferroptosis in DITD.
Methods
Spermatogenic cell apoptosis and viability were measured by flow cytometry and cell counting kit 8 (CCK-8), respectively. The impact of Rbbp6 and Bmal1 on ferroptosis was assessed by determining expression of ferroptosis markers glutathione peroxidase 4 (GPX4) and solute carrier family 7 member 11 (SLC7A11), and levels of malondialdehyde (MDA), glutathione (GSH), iron, and lipid peroxidation. Co-immunoprecipitation was performed to determine the interaction between Rbbp6 and Bmal1, as well as the ubiquitination level of Bmal1. The expression levels of Rbbp6, Bmal1, Yes-associated protein 1 (YAP1), ferroptosis markers, and testicular steroidogenic enzymes were tested by Western blot.
Results
Bmal1 protein expression was significantly downregulated, while Rbbp6 was upregulated in DITD mouse model and high glucose (HG)-induced GC-1 spg cells. Overexpression of Bmal1 improved testicular injury in diabetic mice, reduced 4-hydroxynonenal (4-HNE), MDA, iron levels, and increased expression levels of GPX4, SLC7A11, GSH, as well as testicular steroidogenic enzymes. Rbbp6 decreased Bmal1 level through promoting its ubiquitination. Meanwhile, Rbbp6 knockdown inhibited the ferroptosis of HG-induced GC-1 spg cells, which were abolished by silencing Bmal1. In addition, knockdown of YAP1 or treatment with ferroptosis inducer erastin blocked the above effects caused by Bmal1 overexpression.
Conclusion
Rbbp6-mediated Bmal1 ubiquitination suppressed YAP1 pathway, promoting ferroptosis in DITD. This study highlighted Rbbp6/Bmal1/YAP1 axis as a potential therapeutic target for mitigating DITD.
Basic Research
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N6-Methyladenosine Methyltransferase METTL3 Alleviates Diabetes-Induced Testicular Damage through Modulating TUG1/Clusterin Axis
Yuan Tian, Yue-Hai Xiao, Chao Sun, Bei Liu, Fa Sun
Diabetes Metab J. 2023;47(2):287-300.   Published online January 19, 2023
DOI: https://doi.org/10.4093/dmj.2021.0306
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  • 4 Web of Science
  • 5 Crossref
AbstractAbstract PDFPubReader   ePub   
Background
The present study investigated the regulatory effects of N6-methyladenosine (m6A) methyltransferase like-3 (METTL3) in diabetes-induced testicular damage.
Methods
In vivo diabetic mice and high glucose (HG) treated GC-1 spg cells were established. The mRNA and protein expressions were determined by real-time quantitative polymerase chain reaction, Western blot, immunofluorescence and immunohistochemistry staining. Levels of testosterone, blood glucose, cell viability, and apoptosis were detected by enzyme-linked immunosorbent assay, MTT, and flow cytometry, respectively. Molecular interactions were verified by RNA immunoprecipitation and RNA pull-down assay. Histopathological staining was performed to evaluate testicular injury.
Results
METTL3 and long non-coding RNA taurine up-regulated 1 (lncRNA TUG1) were downregulated in testicular tissues of diabetic mice and HG-treated GC-1 spg cells. METTL3 overexpression could reduce the blood glucose level, oxidative stress and testicular damage but enhance testosterone secretion in diabetic mouse model and HG-stimulated GC-1 spg cells. Mechanically, METTL3-mediated m6A methylation enhanced the stability of TUG1, then stabilizing the clusterin mRNA via recruiting serine and arginine rich splicing factor 1. Moreover, inhibition of TUG1/clusterin signaling markedly reversed the protective impacts of METTL3 overexpression on HG-stimulated GC-1 spg cells.
Conclusion
This study demonstrated that METTL3 ameliorated diabetes-induced testicular damage by upregulating the TUG1/clusterin signaling. These data further elucidate the potential regulatory mechanisms of m6A modification on diabetes-induced testicular injury.

Citations

Citations to this article as recorded by  
  • Negative Regulation of LINC01013 by METTL3 and YTHDF2 Enhances the Osteogenic Differentiation of Senescent Pre‐Osteoblast Cells Induced by Hydrogen Peroxide
    Jiaxin Song, Yuejun Wang, Zhao Zhu, Wanqing Wang, Haoqing Yang, Zhaochen Shan
    Advanced Biology.2024;[Epub]     CrossRef
  • Diabetes and diabetic associative diseases: An overview of epigenetic regulations of TUG1
    Mohammed Ageeli Hakami
    Saudi Journal of Biological Sciences.2024; 31(5): 103976.     CrossRef
  • BRD7 facilitates ferroptosis via modulating clusterin promoter hypermethylation and suppressing AMPK signaling in diabetes-induced testicular damage
    Yuehai Xiao, Zongjian Liang, Jun Qiao, Zhiqiang Zhu, Bei Liu, Yuan Tian
    Molecular Medicine.2024;[Epub]     CrossRef
  • Roles of m6A modification in regulating PPER pathway in cadmium-induced pancreatic β cell death
    Yifei Sun, Rongxian Li, Wenhong Li, Nan Zhang, Guofen Liu, Bo Zhao, Zongqin Mei, Shiyan Gu, Zuoshun He
    Ecotoxicology and Environmental Safety.2024; 282: 116672.     CrossRef
  • METTL14-Mediated m6A Modification of TUG1 Represses Ferroptosis in Alzheimer's Disease via Inhibiting GDF15 Ubiquitination
    Xunhu Gu, Yuanqing Song, Xu Liu, Zhijuan Cheng, Jun Min, Yangbo Zhang
    Frontiers in Bioscience-Landmark.2024;[Epub]     CrossRef

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