Panoply™ Human ADORA2A Knockdown Stable Cell Line

Previous studies have revealed the potential of adenosine monophosphate (AMP) to alleviate obesity-related metabolic diseases, but the underlying molecular mechanisms remain incompletely understood. Here, researchers demonstrate that AMP enhances white fat lipolysis and improves abnormal glucose and lipid metabolism in mice fed a high-fat (HF) diet. The mechanism is that AMP is converted to adenosine (ADO) by ecto-5’-nucleotidase (CD73). Activation of adenosine A2A receptor (ADORA2A) signaling downregulates white adipose tissue methylation, thereby reducing hormone-sensitive lipase (HSL) methylation and promoting HSL transcription and white fat lipolysis. Furthermore, the metabolic benefits of AMP are partially abolished in ADORA2A knockout mice, but re-expression of ADORA2A recapitulates AMP-induced regulation of white fat metabolism. These results reveal a mechanism by which AMP, acting upstream of ADO, stimulates ADORA2A signaling and white fat DNA methylation, contributing to its anti-obesity effects.

Compared with the HF group, AMP increased ADORA2A and ADORA1 protein levels and decreased ADORA3 protein levels (Figure 1A). In ADORA2A knockdown 3T3-L1 cells, the inhibitory effect of AMP on lipid droplet formation was eliminated (Figure 1B). Furthermore, AMP decreased DNMT1 protein levels, which in turn increased HSL gene levels, but these effects were reversed by ADORA2A knockdown (Figure 1C, D). Furthermore, the AMP-induced decrease in HSL promoter methylation and global DNA methylation levels was eliminated in ADORA2A knockdown cells (Figure 1E, F). These results indicate that the ADORA2A pathway plays a crucial role in mediating AMP-induced changes in DNA methylation levels.

Figure 1. ADORA2A is involved in HSL promoter methylation reduction by AMP. (Cui Z, et al., 2025)