Regulation of cardiac O-GlcNAcylation: More than just nutrient availability

BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE

卷:1866

Review

Collins, Helen E.²  Chatham, John C.¹ 

[1] Univ Alabama Birmingham, Dept Pathol, Div Mol & Cellular Pathol, Biomed Res Bldg 2,901 19th St S, Birmingham, AL 35294 USA

[2] Univ Louisville, Dept Med, Div Environm Med, Louisville, KY 40292 USA

关键词: O-GlcNAc;    O-GlcNAc transferase (OGT);    O-GlcNAcase (OGA);    Heart;    Nutrient regulation;    Metabolism;    Cardiomyocyte;    GFAT;   

DOI  :  10.1016/j.bbadis.2020.165712

来源: Elsevier

【 摘 要 】

The post-translational modification of serine and threonine residues of nuclear, cytosolic, and mitochondrial proteins by O-linked beta-N-acetyl glucosamine (O-GlcNAc) has long been seen as an important regulatory mechanism in the cardiovascular system. O-GlcNAcylation of cardiac proteins has been shown to contribute to the regulation of transcription, metabolism, mitochondrial function, protein quality control and turnover, autophagy, and calcium handling. In the heart, acute increases in O-GlcNAc have been associated with cardioprotection, such as those observed during ischemia/reperfusion. Conversely, chronic increases in O-GlcNAc, often associated with diabetes and nutrient excess, have been shown to contribute to cardiac dysfunction. Traditionally, many studies have linked changes in O-GlcNAc with nutrient availability and as such O-GlcNAcylation is often seen as a nutrient driven process. However, emerging evidence suggests that O-GlcNAcylation may also be regulated by non-nutrient dependent mechanisms, such as transcriptional and posttranslational regulation. Therefore, the goals of this review are to provide an overview of the impact of O-GlcNAcylation in the cardiovascular system, how this is regulated and to discuss the emergence of regulatory mechanisms other than nutrient availability.

【 授权许可】

Free