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Human Hematopoietic Stem Cell Vulnerability to Ferroptosis

ABSTRACT: Human Hematopoietic Stem Cell Vulnerability to Ferroptosis

PROVIDER: PRJNA913143 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22768346_1.fastq.gz	Fastqsanger.gz
	SRR22768346_2.fastq.gz	Fastqsanger.gz
	SRR22768347_1.fastq.gz	Fastqsanger.gz
	SRR22768347_2.fastq.gz	Fastqsanger.gz
	SRR22767485.fastq.gz	Fastqsanger.gz

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Project description:Activation of mostly quiescent hematopoietic stem cells (HSC) is a prerequisite for life-long blood production1, 2. This process requires major molecular adaptations to meet the regulatory and metabolic requirements for cell division3-8. The mechanisms governing cellular reprograming upon stem cell activation and their subsequent return to quiescence are still not fully characterized. Here, we describe a role for chaperone-mediated autophagy (CMA)9, a selective form of lysosomal protein degradation, in sustaining adult HSC function. CMA is required for stem cell protein quality control and upregulation of fatty acid metabolism upon HSC activation. We identify that CMA activity decreases with age in HSC and show that genetic or pharmacological activation of CMA can restore functionality of old HSC. Together, our findings provide mechanistic insights into a new role for CMA in sustaining quality control, appropriate energetics and overall long-term hematopoietic stem cell function. Our work supports that CMA may be a promising therapeutic target to enhance hematopoietic stem cell function in conditions such as aging or stem cell transplantation.

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