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. 2019 Jan 29;9:878. doi: 10.1038/s41598-018-37027-2

Figure 1.

Figure 1

SIRT1 protein is reduced in diabetic patients. The concentration of SIRT1 within patient serum was measured by ELISA. (a) SIRT1 serum concentration was significantly decreased by over 75% in diabetic patients (n = 25) compared to healthy controls (n = 25). Representative micrographs of internal mammary artery (IMA) from a non-diabetic patient undergoing CABG surgery, and popliteal artery (PA) harvested from a diabetic patient (DM) undergoing lower limb amputation. (b) Alizarin red staining, positive staining shown by arrow (n = 3). (c) LH panel showing SIRT1 staining (black), lacking in the DM patient (n = 3). Centre panel showing RUNX2 staining (n = 3) and RH panel showing OCN staining (n = 3), positive stain observed in the DM compared to the IMA. **P < 0.005 Scale bar = 200 μm/20 μm.