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Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

ABSTRACT: Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

PROVIDER: PRJNA911239 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22684624.fastq.gz	Fastqsanger.gz
	SRR22684625.fastq.gz	Fastqsanger.gz
	SRR22684626.fastq.gz	Fastqsanger.gz
	SRR22684627.fastq.gz	Fastqsanger.gz
	SRR22684628.fastq.gz	Fastqsanger.gz

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Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

Project description:Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

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Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

Project description:Heterotopic ossification (HO) is a non-physiological process of bone formation in which progenitor cells in soft tissues differentiate into chondrogenic cells. In the case of fibrodysplasia ossificans progressiva (FOP), a rare genetic disease characterized by progressive and systemic HO, the Activin A/mutated-ACVR1/mTORC1 cascade induces HO in progenitors, one of which is the fibro/adipogenic progenitors (FAPs) in muscle tissues. The relevant biological processes aberrantly regulated by activated mTORC1 remain unclear, however. RNA sequencing analyses revealed the enrichment of genes involved in oxidative phosphorylation (OXPHOS) during Activin A-induced chondrogenesis of mesenchymal stem cells derived from induced pluripotent stem cells (iPSCs) of FOP patients. Functional analyses showed a metabolic transition from glycolysis to OXPHOS during chondrogenesis, in conjunction with an upregulation of mitochondrial biogenesis. mTORC1 inhibition by rapamycin suppressed OXPHOS, and IACS-010759, an inhibitor of OXPHOS, inhibited cartilage matrix formation in vitro, indicating that OXPHOS is principally involved in mTORC1-induced chondrogenesis. Furthermore, IACS-010759 inhibited the muscle injury-induced enrichment of FAP genes and HO in transgenic mice carrying the mutated human ACVR1. These data indicated that OXPHOS is a critical downstream mediator of mTORC1 signaling in chondrogenesis and therefore is a potential FOP therapeutic target.

2024-02-16 | GSE221128 | GEO

Oxidative phosphorylation is a pivotal therapeutic target of fibrodysplasia ossificans progressiva

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Oxidative phosphorylation promotes primary melanoma invasion

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Oxidative phosphorylation promotes primary melanoma invasion

Project description:Dermal invasion is a hallmark of malignant melanoma. The molecular alterations driving the progression of primary melanoma to metastatic disease have been studied extensively, whereas the early progression of non-invasive primary melanoma to an invasive state is not well understood. To elucidate the mechanisms underlying the transition from radial to vertical growth, the first step in melanoma invasion, we developed a zebrafish melanoma model in which constitutive activation of ribosomal protein S6 kinase 1 (RSK1) drives tumor invasion. Transcriptomic analysis of RSK1-activated tumors identified metabolic changes, including upregulation of genes associated with oxidative phosphorylation. Vertical growth phase human melanoma cells show higher oxygen consumption and preferential utilization of glutamine compared to radial growth phase melanoma cells. Peroxisome proliferator-activated receptor gamma coactivator-1α (PGC1a has been proposed as a master regulator of tumor oxidative phosphorylation. In human primary melanoma specimens we show that PGC1a protein expression is positively associated with increased tumor thickness and expression of the proliferative marker Ki-67 and the reactive oxygen species (ROS) scavenger SCARA3. PGC1a depletion modulates cellular processes associated with primary melanoma growth and invasion, including oxidative stress. Our results support a role for PGC1a in mediating glutamine-driven OXPHOS to facilitate the invasive growth of primary melanoma.

2020-01-24 | GSE144117 | GEO

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