Characterization of protein lactylation in relation to cardiac metabolic reprogramming in neonatal mouse hearts

ABSTRACT: In mammals, the neonatal heart regenerates within a short time after birth, but adults lack this ability. We have shown that metabolic reprogramming is critical for cardiomyocyte proliferation in the neonatal heart. Herein, we revealed that cardiac metabolic reprogramming could be regulated by altering global protein lactylation. 4D label-free proteomics and Kla omics were performed in postnatal Day 1 (P1), 5 (P5), and 7 (P7) mouse hearts, 2297 Kla sites from 980 proteins were identified, and 1262 Kla sites from 409 proteins were quantified. Functional clustering analysis of proteins with altered Kla sites revealed that the proteins were mainly involved in metabolic processes. The Kla levels in several fatty acid oxidation-related proteins showed high expression at P5, while glycolysis and cell cycle-related proteins were sustainedly decreased from P1-P7. Furthermore, we verified the Kla levels of several differentially modified proteins, including ACAT1, ACADL, PKM and NPM1, by coimmunoprecipitation and Western blotting. Overall, we reported the first comprehensive Kla map in the neonatal mouse heart, which will aid in understanding the regulatory network of metabolic reprogramming and cardiac regeneration.

INSTRUMENT(S):

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Heart

SUBMITTER: Tongyu Zhang  

LAB HEAD: Chaojun Li

PROVIDER: PXD039257 | Pride | 2024-07-02

REPOSITORIES: Pride