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Therapeutically enabled mammalian kidney repair and regeneration

ABSTRACT: Therapeutically enabled mammalian kidney repair and regeneration

PROVIDER: PRJNA818306 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18398619_1.fastq.gz	Fastqsanger.gz
	SRR18398619_2.fastq.gz	Fastqsanger.gz
	SRR18398620_1.fastq.gz	Fastqsanger.gz
	SRR18398620_2.fastq.gz	Fastqsanger.gz
	SRR18398621_1.fastq.gz	Fastqsanger.gz

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Therapeutically enabled mammalian kidney repair and regeneration

Project description:The kidney has large regenerative capacity that is impeded when injured renal tubular epithelial cells (TECs) undergo SNAI1-driven partial epithelial mesenchymal transition (pEMT). Here we investigate the role of IL11 in TEC pEMT and kidney repair. Wild-type mice with acute kidney injury (AKI) upregulate IL11 in TECs triggering an ERK/P90RSK/GSK3β axis of SNAI1 expression leading to impaired renal function, which is abrogated in Il11 null mice. In mouse models of AKI, a neutralizing IL11 antibody promotes kidney regeneration, while attenuating pEMT, fibrosis and kidney dysfunction. In TECs, TGFβ1 induces autocrine IL11/ERK-dependent pEMT leading to paracrine, IL11-mediated fibroblast activation. Mice with TEC-specific deletion of Il11ra1 are protected from pEMT, inflammation, fibrosis and renal failure. In a mouse model of chronic kidney disease, administration of anti-IL11 reverses fibrosis, regenerates kidney parenchyma and restores renal function. Therapeutic inhibition of IL11 signaling appears permissive for promoting kidney regeneration and improving kidney function.

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Mesenchymal precursor cells in adult nerves contribute to mammalian tissue repair and regeneration

Project description:Peripheral innervation plays an important role in regulating tissue repair and regeneration. Here, we provide evidence that injured peripheral nerves provide a reservoir of mesenchymal precursor cells that can directly contribute to murine digit tip regeneration and skin repair. In particular, using single-cell RNA sequencing and lineage tracing we identify transcriptionally-distinct mesenchymal cell populations within the control and injured adult nerve, including neural crest-derived cells in the endoneurium with characteristics of mesenchymal precursor cells. Culture and transplantation studies show that these nerve-derived mesenchymal cells have the potential to differentiate into non-nerve lineages. Moreover, following digit tip amputation, the neural crest-derived nerve mesenchymal cells contribute to the regenerative blastema and ultimately to the regenerated bone. Similarly, neural crest derived nerve mesenchymal cells contribute to the dermis during skin wound healing. These findings support a model where peripheral nerves directly contribute mesenchymal precursor cells to promote repair and regeneration of injured mammalian tissues.

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Mesenchymal precursor cells in adult nerves contribute to mammalian tissue repair and regeneration

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Sphingolipid metabolism controls mammalian heart regeneration

Project description:Sphingolipid metabolism controls mammalian heart regeneration

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Multicellular Transcriptional Analysis of Mammalian Heart Regeneration

Project description:The inability of the adult mammalian heart to regenerate following injury represents a major barrier in cardiovascular medicine. In contrast, the neonatal mammalian heart retains a transient capacity for regeneration, which is lost shortly after birth. Defining the molecular mechanisms that govern regenerative capacity in the neonatal period remains a central goal in cardiac biology. Here, we construct a transcriptional atlas of multiple cardiac cell populations, which enables comparative analyses of the regenerative (neonatal) versus non-regenerative (adult) state for the first time. This work provides a comprehensive transcriptional resource of multiple cardiac cell populations during cardiac development, repair and regeneration. Our findings define a transcriptional program underpinning the neonatal regenerative state and identifies an epigenetic barrier to re-induction of the regenerative program in adult cardiomyocytes.

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Project description:Utilization of lipids as energy substrates after birth causes cardiomyocyte (CM) cell-cycle arrest and loss of regenerative capacity in mammalian hearts. Beyond energy provision, proper management of lipid composition is crucial for cellular and organismal health, but its role in heart regeneration remains unclear. Here, we demonstrate widespread sphingolipid metabolism remodeling in neonatal hearts after injury and find that SphK1 and SphK2, isoenzymes producing the same sphingolipid metabolite sphingosine-1-phosphate (S1P), differently regulate cardiac regeneration. SphK2 is downregulated during heart development and determines CM proliferation via nuclear S1P-dependent modulation of histone acetylation. Reactivation of SphK2 induces adult CM cell-cycle re-entry and cytokinesis, thereby enhancing regeneration. Conversely, SphK1 is upregulated during development and promotes fibrosis through an S1P autocrine mechanism in cardiac fibroblasts. By fine-tuning the activity of each SphK isoform, we develop a therapy that simultaneously promotes myocardial repair and restricts fibrotic scarring to regenerate the infarcted adult hearts.

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Project description:Rationale: Neonatal mice have the capacity to regenerate their hearts in response to injury, but this potential is lost after the first week of life. The transcriptional changes that underpin mammalian cardiac regeneration have not been fully characterized at the molecular level. Objective: The objectives of our study were to determine if myocytes revert the transcriptional phenotype to a less differentiated state during regeneration and to systematically interrogate the transcriptional data to identify and validate potential regulators of this process. Methods and Results: We derived a core transcriptional signature of injury-induced cardiac myocyte regeneration in mouse by comparing global transcriptional programs in a dynamic model of in vitro and in vivo cardiac myocyte differentiation, in vitro cardiac myocyte explant model, as well as a neonatal heart resection model. The regenerating mouse heart revealed a transcriptional reversion of cardiac myocyte differentiation processes including reactivation of latent developmental programs similar to those observed during de-stabilization of a mature cardiac myocyte phenotype in the explant model. We identified potential upstream regulators of the core network, including interleukin 13 (IL13), which induced cardiac myocyte cell cycle entry and STAT6/STAT3 signaling in vitro. We demonstrate that STAT3/periostin and STAT6 signaling are critical mediators of IL13 signaling in cardiac myocytes. These downstream signaling molecules are also modulated in the regenerating mouse heart. Conclusions: Our work reveals new insights into the transcriptional regulation of mammalian cardiac regeneration and provides the founding circuitry for identifying potential regulators for stimulating heart regeneration. Comparison of transcriptional programs of primary myocardial tissues sampled from neonatal mice and murine hearts undergoing post-injury regeneration, along with in vitro ESC-differentiated cardiomyocytes

2014-12-20 | E-GEOD-64403 | biostudies-arrayexpress

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