摘要
The relationship between chronic psychological stress and tumorigenesis has been well defined in epidemiological studies;however, the underlying mechanism remains underexplored. In this study, we discovered that impaired macrophage phagocytosis contributed to the psychological stressevoked tumor susceptibility, and the stress hormone glucocorticoid(GC) was identified as a principal detrimental factor. Mechanistically, GC disturbed the balance of the "eat me" signal receptor(low-density lipoprotein receptor-related protein-1, LRP1) and the "don’t eat me" signal receptor(signal regulatory protein alpha, SIRPa). Further analysis revealed that GC led to a direct, glucocorticoid receptor(GR)-dependent trans-repression of LRP1 expression, and the repressed LRP1, in turn, resulted in the elevatedgene level of SIRPa by down-regulating mi RNA-4695-3 p. These data collectively demonstrate that stress induces the imbalance of the LRP1/SIRPa axis and entails the disturbance of tumor cell clearance by macrophages. Our findings provide the mechanistic insight into psychological stress-evoked tumor susceptibility and indicate that the balance of LRP1/SIRPa axis may serve as a potential therapeutic strategy for tumor treatment.
基金
supported,in part,by National Natural Science Foundation of China(grant numbers 81673709,82004231,U1801284 and 81873209)
Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(grant number 2017BT01Y036,China)and GDUPS(2019,China)
Guangdong Science and Technology Foundation for Distinguished Young Scholars(grant number 2017A030306004,China)
Science and Technology Program of Guangzhou(grant numbers 201903010062 and 202102010116,China)
Fellowship of China Postdoctoral Science Foundation(grant number 2020M683204,China)
Guangdong Basic and Applied Basic Research Fund(grant number 2020A1515110388,China)
Fundamental Research Funds for the Central Universities(grant number 21620448,China)
support of K.C.Wong Education Foundation。
