Fig. 2 ObR is cleaved and has reduced signaling capabilities after incubation with Mmp-2. ObR is cleaved and has reduced signaling capabilities after incubation.

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Fig. 2 ObR is cleaved and has reduced signaling capabilities after incubation with Mmp-2. ObR is cleaved and has reduced signaling capabilities after incubation with Mmp-2. (A) Representative immunolabeling of the ObR extracellular domain (green) in mouse hypothalamic cells exposed to Mmp-2. DAPI (4′,6-diamidino-2-phenylindole; blue) shows cell nuclei. (B) Measurement of the ObR extracellular domain density on cells treated with/without Mmp-2 is presented as mean fluorescent intensity (MFI) ± SD [*P < 0.05, cells treated with Mmp-2 (+Mmp-2) versus without Mmp-2 (−Mmp-2); n = 6]. (C) The incubation media of cells treated with/without MMP-2 analyzed for ObR fragments by WB. (D and E) Activation of ADAM-17 (D) and ADAM-10 (E) by Mmp-2 in hypothalamic cells. Activity was recorded for 30 min and presented as the difference in optical density (dOD ± SD; n = 6). *P < 0.05. TNF, tumor necrosis factor; LPS, lipopolysaccharide. (F) Representative WB of p-ObR, p-STAT-3, p-ERK, and corresponding total protein in cells treated with Mmp-2 (last four lanes) and their respective controls (first four lanes). Leptin was added to the cells after Mmp-2 removal for selected time points (indicated in the figure). (G) p-ERK/ERK ratio in control and Mmp-2–treated cells after leptin stimulation. *P < 0.05, untreated versus Mmp-2–treated cells at t = 5 min (n = 3 in each group). (H) p-STAT-3/STAT-3 ratio in untreated and Mmp-2–treated cells after leptin stimulation. *P < 0.05, untreated versus Mmp-2–treated cells at t = 5 min; **P < 0.005, untreated versus Mmp-2–treated cells at t = 15 min (n = 3 in each group). (I) p-ObR/β-actin ratio in untreated and Mmp-2–treated cells after leptin stimulation. *P < 0.05, untreated versus Mmp-2–treated cells at t = 15 min (n = 3 in each group). Rafi Mazor et al., Sci Transl Med 2018;10:eaah6324 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works