PNPLA2 and hepatocellular carcinoma: LncRNA nuclear paraspeckle assembly transcript 1 (NEAT1) interferes HCC lipolysis and promotes HCC growth in vitro and in vivo by transcriptionally maintaining high levels of adipose triglyceride lipase (ATGL) and its catalytic products, diacylglycerol (DAG) and free fatty acid (FFA).