Furthermore, using IHC method, the cell proliferation markers Ki-67, PCNA and the key protein of STAT3 pathway p-STAT3 was significantly decreased, the apoptosis related gene cleaved Caspase 3 and PARP were significantly increased by GLA (Fig. 6F), further suggesting that GLA inhibited the cell proliferation in multiple myeloma through STAT3 pathway. Here, MKI67 is linked to plasma cell myeloma.