Dataset Information

Targeting NPM1 Epigenetically Promotes Post-infarction Cardiac Repair by Reprogramming Reparative Macrophage Metabolism [CUT&Tag]

ABSTRACT: Background: Post-infarction heart failure is attributed to ischemia-induced myocardial inflammation and unfavorable remodeling, with reparative macrophages playing a crucial role in limiting excessive fibrosis and promoting cardiac repair via cytokine secretion and cross-cell interactions. Hence, a timely and adequate transition of macrophage phenotypes is essential for proper wound healing post-MI, but the precise mechanisms underlying this process remain incompletely elucidated. Methods: To elucidate the function of NPM1 in post-infarct cardiac repair, we generated macrophage-specific NPM1 knockout mouse models. Additionally, Cut&Tag assays were conducted on cardiac macrophages for the first time to explore the epigenetic mechanisms underlying NPM1-mediated regulation of macrophage metabolic reprogramming. Results: Macrophage-specific deletion of NPM1 in MI mouse models resulted in reduced tissue fibrosis and enhanced cardiac repair by promoting the phenotypic transition of macrophages towards a reparative state. NPM1 deletion also led to a shift in macrophage metabolism from glycolysis to mitochondrial OXPHOS via inactivation of the mTOR cascades. Mechanistically, we demonstrated that IL-4 induced NPM1 oligomerization, which recruited histone demethylase KDM5b to the promoter region of Tsc1, ultimately leading to macrophage metabolic rewiring. Antisense oligonucleotides and inhibitory compounds targeting NPM1 exhibited notable protective effects on cardiac repair post-MI. Conclusions: Our study demonstrates that NPM1 may serve as a promising prognostic biomarker and a valuable therapeutic target for ischemia-induced heart failure, shedding new light on the understanding of post-infarct cardiac repair and may pave the way for the development of innovative therapeutic strategies.

ORGANISM(S): Mus musculus

PROVIDER: GSE230938 | GEO | 2026/01/26

REPOSITORIES: GEO

ACCESS DATA

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Project description:Background—Mesenchymal stem cells (MSCs) have shown therapeutic potency for treating cardiovascular diseases, but their therapeutic efficacy shows significant heterogeneity depending on their tissue of origin. We herein sought to identify the optimal source of MSCs for cardiovascular disease therapy. Methods—Heart- and bone marrow (BM)-derived GFP+ cells positive for the MSCs marker, Nestin, were flow cytometrically sorted from 7-day-postnatal Nestin-GFP transgenic mice. To study their biological characteristics in vitro, we characterized their self-renewal capacity, multi-lineage differentiation ability, and surface markers. To investigate their therapeutic potential in vivo, we intramyocardially injected Nestin+ cells (3×105) into the infarct border zone of mice subjected to acute myocardial infarction (MI), and performed echocardiography and Masson’s-Trichrome staining at 1 and 3 weeks post-MI. We characterized gene profiles with RNA-sequencing analysis, and analyzed the putative reparative mechanism, that of Periostin-mediated M2 macrophages polarization, by immunofluorescence staining, qPCR, ELISA, and flow cytometry in vivo and in vitro. Results—In vitro, the heart- and BM-derived Nestin+ cells (Nes+cMSCs and Nes+bmMSCs, respectively) were found to possess self-renewal ability, show similar tri-lineage differentiation potentials, and express some MSCs-related surface markers. Importantly, Nes+cMSCs significantly improved cardiac function, attenuated left ventricular (LV) remodeling, and decreased infarct size in the mouse MI model, compared with Nes+bmMSCs- or saline-treated MI controls. Nes+cMSC treatment notably reduced the total number of CD68+ pan-macrophages while inducing the polarization of macrophages toward an anti-inflammatory M2 phenotype in ischemic myocardium, compared with the saline-treated MI control. Periostin, which was highly expressed in Nes+cMSCs, could promote the polarization of M2-subtype macrophages in vitro and in vivo. Finally, Periostin knockdown remarkably reduced the therapeutic effects of Nes+cMSCs, inhibiting the survival and LV remodeling of MI model mice and significantly decreasing the number of M2 macrophages at lesion sites. Conclusions—Nestin+ cMSCs have greater efficacy than Nestin+ bmMSCs for cardiac repair following acute MI, using a reparative mechanism that acts at least partly through Periostin-mediated M2 macrophage polarization.

Dataset Information

Targeting NPM1 Epigenetically Promotes Post-infarction Cardiac Repair by Reprogramming Reparative Macrophage Metabolism [CUT&Tag]

Dataset's files

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets