Inhibitory effect of CUL1 on atherosclerosis through the p53 pathway

Zhang, Xi; Lu, Yaobin; Jiang, Wei; Yang, Qianhong

doi:10.21037/atm-22-4372

Cited by 3 publications

References 32 publications

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The Identification of Key Genes and Biological Pathways in Cardiac Arrest by Integrated Bioinformatics and Next Generation Sequencing Data Analysis

Vastrad,

Vastrad

2024

Preprint

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Cardiac arrest (CA) is a common cause of death world wide. The disease has lacks effective treatment. Efforts have been made to elucidate the molecular pathogenesis of CA, but the molecular mechanisms remain elusive. To identify key genes and pathways in CA, the next generation sequencing (NGS) GSE200117 dataset was downloaded from the Gene Expression Omnibus (GEO) database. DESeq2 tool was used to recognize differentially expressed genes (DEGs). Gene ontology (GO) and REACTOME pathway enrichment analyses were performed to analyze the DEGs and associated signal pathways in the g:Profiler database. The IID database was used to construct the protein-protein interaction (PPI) network, and modules analysis was performed using Cytoscape. A miRNA-hub gene regulatory network and TF-hub gene regulatory network were then constructed to screen miRNAs, TFs and hub genes by miRNet and NetworkAnalyst database and Cityscape software. Receiver operating characteristic curve (ROC) analysis used to verified the hub genes. In total, 844 DEGs were identified, comprising 414 up regulated genes and 430 down regulated genes. GO and REACTOME pathway enrichment analyses indicated that the DEGs for CA were mainly enriched in organonitrogen compound metabolic process, response to stimulus, translation and immune system. Ten hub genes (up-regulated: HSPA8, HOXA1, INCA1 and TP53; down-regulated: HSPB1, LMNA, SNCA, ADAMTSL4 and PDLIM7) were screened. We also predicted miRNAs (hsa-mir-1914-5p and hsa-mir-598-3p) and TFs (JUN and PRRX2) targeting hub genes. This study uses a series of bioinformatics technologies to obtain hug genes, miRNAs and TFs, and key pathways related to CA. These analysis results provide us with new ideas for finding biomarkers and treatment methods for CA.

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The Identification of Key Genes and Biological Pathways in Cardiac Arrest by Integrated Bioinformatics and Next Generation Sequencing Data Analysis

Vastrad,

Vastrad

2024

Preprint

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Diacylglycerol Kinase ζ Attenuates Doxorubicin‐Induced Cardiotoxicity Through p53 Degradation

Tachibana,

Otaki,

Watanabe

et al. 2024

JAHA

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Background Doxorubicin‐induced cardiotoxicity is still an important medical problem associated with a high mortality rate in cancer survivors. p53 plays a key role in doxorubicin‐induced cardiotoxicity. Diacylglycerol kinase ζ (Dgkζ), a 130‐kDa enzyme abundant in cardiomyocytes, regulates the p53 protein expression level in neurons. To elucidate the mechanism of doxorubicin‐induced cardiotoxicity, we focused on the functional role of Dgkζ and its interaction with heat shock protein 70 (Hsp70)–related ubiquitin E3 ligases such as E6‐associated protein (E6ap) and C‐terminus of Hsp70‐interacting protein. Methods and Results Protein interactions of Dgkζ with Hsp70 and E6ap were confirmed by immunoprecipitation, but not C‐terminus of Hsp70‐interacting protein. We administered doxorubicin in cardiac‐specific overexpression of Dgkζ transgenic (Dgkζ‐Tg) mice and wild‐type littermates. Dgkζ‐Tg mice showed lower p53 protein expression levels, preserved cardiac function, and improved survival rates compared with wild‐type littermates after doxorubicin administration. RNA sequence analysis of myocardial tissues from Dgkζ‐Tg after doxorubicin stimulation identified Hspa1b encoding Hsp70 as the differentially expressed gene. Dgkζ overexpression increased proteasomal p53 degradation and attenuated cardiomyocyte apoptosis after doxorubicin stimulation in cardiomyocytes, which was reversed by knockdown of E6ap. Dgkζ interacted with E6ap through ankyrin‐like repeats. The overexpression of mutant Dgkζ, lacking ankyrin‐like repeats, failed to inhibit p53 protein expression after doxorubicin stimulation. In Dgkζ‐overexpressing cardiomyocytes, expression levels of p53 and caspase‐3 were increased by knockdown of the C‐terminus of Hsp70‐interacting protein. Conclusions We demonstrated for the first time that Dgkζ augments p53 ubiquitin‐proteasome degradation and ameliorates doxorubicin‐induced cardiotoxicity by interacting with Hsp70 and E3 ligases such as E6ap and C‐terminus of Hsp70‐interacting protein.

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Significant role and the underly mechanism of cullin-1 in chronic obstructive pulmonary disease

Hao,

Lin,

Kong

et al. 2024

Open Medicine

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Background This study investigated the role and mechanisms of cullin-1 (CUL1) in chronic obstructive pulmonary disease (COPD). Methods Cigarette smoke extract (CSE)-treated mouse pulmonary microvascular endothelial cells (mPMECs) and cigarette smoke inhalation (CSI)-stimulated mice were used to construct in vitro and in vivo COPD models, respectively. CUL1 expression was assessed using reverse transcriptase-quantitative polymerase chain reaction, Western blotting, and immunohistochemistry. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and flow cytometry were used to detect cell viability and apoptosis, respectively. We conducted an enzyme-linked immunosorbent assay on mPMECs and bronchoalveolar lavage fluid (BALF) to detect inflammatory factors. Reactive oxygen species, malondialdehyde, and superoxide dismutase were detected using the corresponding kits. The histological characteristics of the lung tissues were determined by hematoxylin and eosin staining. Results CUL1 expression was downregulated in COPD. CUL1 overexpression significantly promoted cell viability, reduced cell apoptosis, and inhibited inflammatory responses and oxidative stress in CSE-treated mPMECs. These changes were reversed by the p53 agonist nutlin-3. In addition, CUL1 overexpression significantly relieved COPD in mice, as confirmed by the reduced secretion of inflammatory factors in BALF, inhibited oxidative stress response, and improved lung function. Conclusion CUL1 plays a protective role in CSE-treated mPMECs and CSI-stimulated mice by inhibiting the p53 signaling pathway.

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Inhibitory effect of CUL1 on atherosclerosis through the p53 pathway

Cited by 3 publications

References 32 publications

The Identification of Key Genes and Biological Pathways in Cardiac Arrest by Integrated Bioinformatics and Next Generation Sequencing Data Analysis

The Identification of Key Genes and Biological Pathways in Cardiac Arrest by Integrated Bioinformatics and Next Generation Sequencing Data Analysis

Diacylglycerol Kinase ζ Attenuates Doxorubicin‐Induced Cardiotoxicity Through p53 Degradation

Significant role and the underly mechanism of cullin-1 in chronic obstructive pulmonary disease

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