A Novel Hidden Protein p-414aa Encoded by circSETD2(14,15) Inhibits Vascular Remodeling
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ABSTRACT:
PROVIDER: PRJNA1183778 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR31295988_1.fastq.gz | Fastqsanger.gz | |||
| SRR31295988_2.fastq.gz | Fastqsanger.gz | |||
| SRR31295989_1.fastq.gz | Fastqsanger.gz | |||
| SRR31295989_2.fastq.gz | Fastqsanger.gz | |||
| SRR31295990_1.fastq.gz | Fastqsanger.gz |
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Project description:The phenotypic switching of vascular smooth muscle cells (VSMCs) leads to neointimal hyperplasia, which is the underlying cause of vascular remodeling diseases such as atherosclerosis and hypertension. Novel hidden proteins encoded by circular RNAs (circRNAs) play crucial roles in disease progression. Our study identified a new protein derived from a circRNA in VSMCs and demonstrated its potential role in regulating vascular remodeling. We discovered a novel hidden protein, p-414aa, encoded by circSETD2(14,15), which can inhibit vascular remodeling. Both circSETD2(14,15) and p-414aa may serve as potential therapeutic targets for vascular remodeling diseases. In this study, we demonstrated that the new protein p-414aa encoded by circSETD2(14,15) inhibits VSMC proliferation and neointimal hyperplasia through the HuR/C-FOS axis. In summary, our data provide a molecular framework for the phenotypic switching of vascular smooth muscle cells.
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Project description:Increased level of angiotensin II (Ang II) plays a central role in the development of hypertensive vascular remodeling. Here, we identify the deubiquitinating enzyme JOSD2 as a protective factor and investigate its molecular mechanism in Ang II-induced vascular remodeling. Firstly, we found that JOSD2 was up-regulated in aortic smooth muscle cells but not endothelial cells of Ang II-challenged mouse vascular tissues. Whole-body knockout of JOSD2 significantly deteriorated Ang II-induced vascular remodeling in mice. Conversely, Ang II-induced vascular remodeling was reversed by VSMC-specific JOSD2 overexpression. In vitro, JOSD2 deficiency aggravated the fibrosis, proliferation, and migration induced by Ang II in vascular smooth muscle cells (VSMCs), while these changes were reversed by JOSD2 overexpression. RNA-seq analysis showed that the protective effects of JOSD2 in VSMCs were related to TGFβ-SMAD pathway. Furthermore, the LC-MS/MS analysis identified SMAD7, a negative regulator in TGFβ-SMAD pathway, as the substrate of JOSD2. JOSD2 specifically bound to the MH1 domain of SMAD7 to removed K48-linked Ub chains of SMAD7 at lysine 220 to sustain SMAD7 stability. Taken together, our finding reveals that JOSD2-SMAD7 axis is critical for relieving Ang II-induced vascular remodeling and JOSD2 maybe a novel and potential therapeutic target for hypertensive vascular remodeling.
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Project description:JOSD2 inhibits angiotensin II-induced vascular remodeling by deubiquitinating and stabilizing SMAD7
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Project description:Increased level of angiotensin II (Ang II) plays a central role in the development of hypertensive vascular remodeling. Here, we identify the deubiquitinating enzyme JOSD2 as a protective factor and investigate its molecular mechanism in Ang II-induced vascular remodeling. Firstly, we found that JOSD2 was up-regulated in aortic smooth muscle cells but not endothelial cells of Ang II-challenged mouse vascular tissues. Whole-body knockout of JOSD2 significantly deteriorated Ang II-induced vascular remodeling in mice. Conversely, Ang II-induced vascular remodeling was reversed by VSMC-specific JOSD2 overexpression. In vitro, JOSD2 deficiency aggravated the fibrosis, proliferation, and migration induced by Ang II in vascular smooth muscle cells (VSMCs), while these changes were reversed by JOSD2 overexpression. RNA-seq analysis showed that the protective effects of JOSD2 in VSMCs were related to TGFβ-SMAD pathway. Furthermore, the LC-MS/MS analysis identified SMAD7, a negative regulator in TGFβ-SMAD pathway, as the substrate of JOSD2. JOSD2 specifically bound to the MH1 domain of SMAD7 to removed K48-linked Ub chains of SMAD7 at lysine 220 to sustain SMAD7 stability. Taken together, our finding reveals that JOSD2-SMAD7 axis is critical for relieving Ang II-induced vascular remodeling and JOSD2 maybe a novel and potential therapeutic target for hypertensive vascular remodeling.
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Project description:It has been a long debate whether the 98% “non-coding” fraction of human genome can encode functional proteins besides a “random noise” of translation. We used our established translatome sequencing (RNC-seq) to analyze human cells and found that up to 3330 long non-coding RNAs (lncRNAs) were bound to ribosomes and thus might be translated into proteins (with more than 50 amino acids). These new protein-coding genes distributed universally in all human chromosomes. We then used various experimental methods including mass spectrometry, immunoblotting, subcellular localization and phenotype assessments to verify the existence of such a hidden human proteome encoded by purported lncRNAs that can express functional proteins. These new proteins deviate from the canonical proteins in various physical and chemical properties, and emerged mostly in primates during evolution. In sum, we experimentally evidenced a hidden human functional proteome encoded by purported lncRNAs, suggesting that the human genome has to be systematically re-annotated.
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