TIMP1 and focal segmental glomerulosclerosis: As shown in Fig. 3C TIMP1 was more abundant (p < 0.05) in exosomes from No FSGS patients compared to FSGS, namely 4.6E+03 (3.4E+03–6.1E+03) and 1.6E+03 (1.2E+0.3–1.9E+0.3) Optical Density Units, respectively (Fig. 3D).