TLR4 and liver cancer: M2 polarization can also interact with the miR-372-3p/TLR4 axis, thus affecting the delivery of lncRNA PART1 into liver cancer tissues and cells via tumor-derived extracellular vesicles, inducing the upregulation of PART1 and Toll-like receptor 4 (TLR4) and downregulation of miR-372-3p, and promoting the proliferation and invasion of liver cancer cells.