Teriflunomide/leflunomide synergize with chemotherapeutics by decreasing mitochondrial fragmentation via DRP1 in SCLC
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PROVIDER: PRJNA1113650 | ENA |
REPOSITORIES: ENA
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Project description:Although up to 80% small-cell lung cancer (SCLC) patients response good for first-line chemotherapy regimen, most patients develop recurrence of the disease within weeks to months. Here, we report cytostatic effect of Leflu and Teri on SCLC cell proliferation through inhibition of DRP1 phosphorylation at Ser616 and decreased mitochondrial fragmentation. When administered together, Teri and carboplatin (Carbo) acted synergistically to significantly inhibit cell proliferation and DRP1 phosphorylation, reduce abundance of intermediates in pyrimidine de novo pathway, and increase apoptosis and DNA damage. Combination of Leflu&Carbo has anti-tumorigenic effect in vivo. Additionally, lurbinectedin (Lur) and Teri potently and synergistically inhibited spheroid growth, and depleted uridine and DRP1 phosphorylation in mouse tumors. Our results suggest combinations of Carbo and Lur with Teri or Leflu are efficacious and underscore how the relationship between DRP1/DHODH and mitochondrial plasticity serves as a potential therapeutic target to validate these treatment strategies in SCLC clinical trials.
2024-05-22 | GSE267928 | GEO
Project description:Purpose:to verify Drp1-mediated biological pathways under physiological and ischemia conditions.Methods:C57BL/6 mice and Drp1 knockdown mice were used for ischemia treatment. Right femoral arteries were catheterized with polyethylene catheters for bleeding 50% of total blood volume (≈7% of weight). The ischemia time started to calculate after the model was established. A laparotomy was then carried out to obtain superior mesenteric artery tissues (SMAs) for transcriptome analysis. Series-Cluster analysis was performed to identify the global trends of mitochondrial DEGs after Drp1 knockdown. Gene ontology (GO) analysis was performed to facilitate elucidating the biological process (BP), molecular function (MF) and cellular component (CC) of unique genes in the significant or representative profiles. Results:In addition to its traditional roles in GTPase regulation and mitochondrial fission, Drp1 may also regulate actin cytoskeleton and the movement of microtubules. Besides, Drp1 may participate in the regulation of morphology and functions of other organelles, including endoplasmic reticulum, peroxisome, phagolysosome, etc. As for general organ functions, Drp1 may regulate vascular constriction and dilation. These consequences indicated the important role of Drp1 in ischemia-induced cellular regulation. Conclusions: Drp1 deficiency proves the important role of Drp1 in ischemia-induced biomedical processes through multiple potential fission-independent manners. Methods:C57BL/6 mice and Drp1 knockdown mice were used for ischemia treatment. Right femoral arteries were catheterized with polyethylene catheters for bleeding 50% of total blood volume (≈7% of weight). The ischemia time started to calculate after the model was established. A laparotomy was then carried out to obtain superior mesenteric artery tissues (SMAs) for transcriptome analysis. Series-Cluster analysis was performed to identify the global trends of mitochondrial DEGs after Drp1 knockdown. Gene ontology (GO) analysis was performed to facilitate elucidating the biological process (BP), molecular function (MF) and cellular component (CC) of unique genes in the significant or representative profiles. Results:In addition to its traditional roles in GTPase regulation and mitochondrial fission, Drp1 may also regulate actin cytoskeleton and the movement of microtubules. Besides, Drp1 may participate in the regulation of morphology and functions of other organelles, including endoplasmic reticulum, peroxisome, phagolysosome, etc. As for general organ functions, Drp1 may regulate vascular constriction and dilation. These consequences indicated the important role of Drp1 in ischemia-induced cellular regulation. Conclusions: Drp1 deficiency proves the important role of Drp1 in ischemia-induced biomedical processes through multiple potential fission-independent manners.
2020-04-29 | GSE124096 | GEO
Project description:Mitochondrial homeostasis is important for cell metabolism, growth, proliferation, and immune responses. The critical regulator for mitochondrial homeostasis, Drp1 and TFAM are frequently abnormal expression in many cancers and is closely implicated in tumorigenesis. Here, we found that Drp1 high expression or TFAM low expression is correlated with poor overall survival of ESCC patients. However, the underling mechanism by Drp1 or TFAM influence tumor progression is largely unknown, especially in esophageal squamous cell carcinoma (ESCC). To investigate the underling mechanisms of Drp1 overexpression or TFAM deficiency-mediated ESCC progression, transcriptome profiling was performed by RNA sequencing analysis in ESCC cells with Drp1 overexpression or TFAM knockdown.
2022-03-02 | GSE182710 | GEO
Project description:The Dynamin-related GTPase, Drp1 (encoded by Dnm1l) plays a central role in mitochondrial fission and is requisite for numerous cellular processes however its role in oxidative metabolism remains unclear. Herein, we show that among human tissues, skeletal muscle exhibits the strongest correlations with the DNM1L gene. Knockdown of Drp1 (Drp1-KD) promoted mitochondrial hyperfusion in the muscle of male mice. Reduced fatty acid oxidation and accumulation of intramyocellular lipids along with increased muscle succinate was observed in Drp1-KD muscle. Muscle Drp1-KD reduced Complex II assembly and activity as a consequence of diminished mitochondrial translocation of succinate dehydrogenase assembly factor 2 (Sdhaf2). Restoration of Sdhaf2, normalized Complex II activity and lipid oxidation in Drp1-KD myocytes. Drp1 appears critical in maintaining mitochondrial Complex II assembly and fatty acid oxidation, suggesting a mechanistic link between mitochondrial morphology and skeletal muscle lipid metabolism which is of clinical significance in combatting metabolic diseases.
2024-01-26 | GSE248081 | GEO
Project description:To reveal the molecular mechanisms underlying DRP1-mediated macrophage reprogramming during hypoxia serum starvation (HSS) an in vitro ischemia model, we performed bulk RNA-seq analysis on mouse bone marrow derived macrophages (BMDM) upon HSS-induced DRP1 mediated macrophage reprogramming.
2024-10-28 | GSE280186 | GEO
Project description:In cells, mitochondria undergo constant fusion and fission. An essential factor for fission is the mammalian dynamin-related protein 1 (Drp1). Dysregulation of Drp1 has been linked to neurodegenerative diseases including Parkinson’s as well as cardiovascular diseases and cancer. Here, we developed nanobodies (Nbs) for proteomics, advanced microscopy and live cell imaging of Drp1. To specifically enrich endogenous Drp1 with interacting proteins for proteomics, we functionalized high-affinity Nbs as capture matrices. Considering the wide range of research applications, the presented Nb toolset will open up new possibilities for advanced functional studies of Drp1 in disease-relevant models.
2024-05-29 | PXD051737 | Pride
Project description:We performed RNAseq analysis of 3 days in vitro activated control and Drp1 KO T cells to investigate the role of Drp1 in regulating global transcriptional changes upon activation in T cells. Our analysis shows that Drp1 sustains metabolic reprogramming upon TCR stimulation. Indeed, in Drp1 KO T cells most of the genes encoding for glycolytic enzymes are down-regulated, while TCA cycle and oxidative phosphorylation genes, as well as several genes encoding enzymes of fatty acid synthesis and beta-oxidation, are upregulated.
2018-12-11 | GSE112143 | GEO
Project description:Macrophages play a critical role in the regulation of inflammation and tissue homeostasis. In addition to their vital functions for cell survival and physiology, mitochondria play a crucial role in innate immunity as a platform for the induction of inflammatory responses by regulating cell signaling and dynamics. Dynamin-related protein 1 (Drp1) plays a role in the induction of inflammatory responses and the subsequent development of various diseases. PGAM5 (phosphoglycerate mutase member 5) is a mitochondrial outer membrane phosphatase that dephosphorylates its substrate, Drp1. Previous studies showed that PGAM5 regulates the phosphorylation of Drp1 for the activation of NKT cells and T cells. However, it is not clear how PGAM5 regulates Drp1 activity for the induction of inflammation in macrophages. Here, we demonstrate that PGAM5 activity regulates the dephosphorylation of Drp1 in macrophages, leading to the induction of proinflammatory responses in macrophages. In TLR signaling, PGAM5 regulates the expression and production of inflammatory cytokines by regulating the activation of downstream signaling pathways, including the NF-kB and MAPK pathways. Upon LPS stimulation, PGAM5 interacts with Drp1 to form a complex, leading to the production of mtROS. Furthermore, PGAM5-Drp1 signaling promotes the polarization of macrophages toward a proinflammatory phenotype. Our study further demonstrates that PGAM5-Drp1 signaling promotes metabolic reprogramming by upregulating glycolysis and mitochondrial metabolism in macrophages. Altogether, PGAM5 signaling might be a link between alterations in Drp1-mediated mitochondrial dynamics and inflammatory responses in macrophages and may be a target for the treatment of inflammatory diseases.
2023-06-20 | GSE235306 | GEO
Project description:RNA-seq analysis of Ad-LacZ, Ad-Fis1 and Ad-Drp1 infected primary hepatocyte.
2021-03-26 | GSE169630 | GEO
Project description:Transcriptome Analysis of Drp1-mediated biological pathways under physiological and ischemia conditions in Drp1-knockdown mice
| PRJNA510759 | ENA