TGF-β is a well-described immunoregulatory molecule that is produced by most cell types.
Many studies have been aimed at investigating the role played by TGF-β in different cell
types and situations. Most methods of measuring TGF-β have previously relied on enzyme-
linked immunosorbent assay (ELISA) or assays of its anti-proliferative effects on various cell
lines. Both assays, though useful, cannot be used to effectively identify the cells that are
producing TGF-β in a mixture of cells. It is especially important to know the source and …