CCL7 and neoplasm: Another study also found that TA-MSCs derived from lymphomas in mice can promote tumour growth, and further studies showed that TA-MSCs can produce high levels of the CC-chemokine receptor 2 (CCR2) ligands CCL2, CCL7 and CCL12, which recruit macrophages into the tumour and lead to the acquisition of an M2­like phenotype [23].