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The transcriptional and regulatory identity of erythropoietin producing cells

ABSTRACT: The transcriptional and regulatory identity of erythropoietin producing cells

PROVIDER: PRJNA795794 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17514700_1.fastq.gz	Fastqsanger.gz
	SRR17514700_2.fastq.gz	Fastqsanger.gz
	SRR17514800_1.fastq.gz	Fastqsanger.gz
	SRR17514800_2.fastq.gz	Fastqsanger.gz
	SRR17514701_1.fastq.gz	Fastqsanger.gz

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The transcriptional and regulatory identity of erythropoietin producing cells

Project description:Erythropoietin (Epo) is the master regulator of erythropoiesis and oxygen homeostasis. Despite its physiological importance, the molecular and genomic contexts of the cells responsible for renal Epo production have not yet been resolved, limiting effective cell-based therapies for anemia. Here, we performed single-cell profiling of an Epo reporter mouse to molecularly identify Epo-producing cells under hypoxic conditions. We report that a distinct and homogeneous population of kidney stromal cells, which we name Norn cells, are the sole source of Epo production in vivo. Extensive characterization of the Norn epigenetic and transcriptional landscapes revealed Norn-specific markers, pathways, and transcription factor circuits conserved from mice to humans. These findings open new avenues to functionally dissect EPO gene regulation in human evolution and disease, and pave the way for the next generation of genetic and cell-based approaches for EPO therapies.

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Project description:Recombinant human erythropoietin (rhEPO) has potent procognitive effects, likely hematopoiesis-independent, but underlying mechanisms and physiological role of brain-expressed EPO remained obscure. Here, we provide transcriptional hippocampal profiling of male mice treated with rhEPO. Based on ~108,000 single nuclei, we unmask multiple pyramidal lineages with their comprehensive molecular signatures. By temporal profiling and gene regulatory analysis, we build developmental trajectory of CA1 pyramidal neurons derived from multiple predecessor lineages and elucidate gene regulatory networks underlying their fate determination. With EPO as ꞌtoolꞌ, we discover populations of newly differentiating pyramidal neurons, overpopulating to ~200% upon rhEPO with upregulation of genes crucial for neurodifferentiation, dendrite growth, synaptogenesis, memory formation, and cognition. Using a Cre-based approach to visually distinguish pre-existing from newly formed pyramidal neurons for patch-clamp recordings, we learn that rhEPO treatment differentially affects excitatory and inhibitory inputs. Our findings provide mechanistic insight into how EPO modulates neuronal functions and networks.

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