2. Academic Validation
  3. Long noncoding RNA MAGI2-AS3 regulates the H2O2 level and cell senescence via HSPA8

Long noncoding RNA MAGI2-AS3 regulates the H2O2 level and cell senescence via HSPA8

  • Redox Biol. 2022 Aug;54:102383. doi: 10.1016/j.redox.2022.102383.
Yingmin Zhang 1,  Xinhua Qiao 2,  Lihui Liu 3,  Wensheng Han 1,  Qinghua Liu 3,  Yuanyuan Wang 1,  Ting Xie 1,  Yiheng Tang 4,  Tiepeng Wang 2,  Jiao Meng 2,  Aojun Ye 1,  Shunmin He 4,  Runsheng Chen 4,  Chang Chen 5
Affiliations

Affiliations

  • 1 National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
  • 2 National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
  • 3 Key Laboratory of RNA Biology, Center for Big Data Research in Health, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
  • 4 University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of RNA Biology, Center for Big Data Research in Health, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
  • 5 National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: [email protected].
PMID: 35797800 DOI: 10.1016/j.redox.2022.102383
Abstract

The redox homeostasis system regulates many biological processes, intracellular antioxidant production and redox signaling. However, long noncoding RNAs (lncRNAs) involved in redox regulation have rarely been reported. Herein, we reported that downregulation of MAGI2-AS3 decreased the superoxide level in Human fibroblasts (Fbs), a replicative aging model, as detected by the fluorescent probes dihydroethidium (DHE) and MitoSOX™ Red. RNA pulldown combined with mass spectrometry showed that HSPA8 is a novel interacting protein of MAGI2-AS3, which was further confirmed by photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (PAR-CLIP). Downregulation of MAGI2-AS3 decreased the hydrogen peroxide (H2O2) content by stabilizing the HSPA8 protein level via inhibiting the protesome degradation of HSPA8. Further evidence showed that MAGI2-AS3 interacted with the C-terminal domain (CTD) of HSPA8. Downregulation of MAGI2-AS3 delayed cell senescence, while this antiaging effect was abolished by HSPA8 knockdown. The underlying molecular mechanism by which MAGI2-AS3 knockdown inhibited cell senescence was mediated via suppression of the ROS/MAP2K6/p38 signaling pathway. Taken together, these findings revealed that downregulation of lncRNA MAGI2-AS3 decreased the H2O2 content and delayed cell senescence by stabilizing the HSPA8 protein level, identifying a potential antiaging application.

Keywords

Cell senescence; HSPA8; Long noncoding RNA; MAGI2-AS3.

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