Journal: PLoS ONE
Article Title: The NMR Structure of Human Obestatin in Membrane-Like Environments: Insights into the Structure-Bioactivity Relationship of Obestatin
doi: 10.1371/journal.pone.0045434
Figure Lengend Snippet: Immunocytochemical analysis of the Ki67 expression in ARPE-19 cells after 24 h of proliferation. A) Control. B) 10% FBS (v/v). C) 100 nM human obestatin ( 1 ). D) 100 nM human non-amidated obestatin ( 2 ). E) 100 nM human (6–23)-obestatin ( 3 ). F) 100 nM human (11–23)-obestatin ( 4 ). G) 100 nM human (16–23)-obestatin ( 5 ). H) 100 nM mouse obestatin ( 6 ). The magnification was 20x. I) Quantification of the immunocytochemical expression of Ki67 in ARPE-19 cells after treatment with 10% FBS (v/v; 100±2), 100 nM human obestatin ( 1 ; 84±1%), 100 nM human non-amidated obestatin ( 2 ; 33±2%), 100 nM human (6–23)-obestatin ( 3 ; 56±3%), 100 nM human (11–23)-obestatin ( 4 ; 67±3%), 100 nM human (16–23)-obestatin ( 5 ; 50±2%) and 100 nM mouse obestatin ( 6 ; 32±2%). The expression of Ki67 was expressed as the fold change relative to the expression level in FBS-treated cells in the positive control (mean ± SE). J) BrdU incorporation in ARPE-19 cells after treatment with 10% FBS (v/v; 100±1), 100 nM human obestatin ( 1 ; 84±4%), 100 nM human non-amidated obestatin ( 2 ; 39±2%), 100 nM human (6–23)-obestatin ( 3 ; 30±1%), 100 nM human (11–23)-obestatin ( 4 ; 52±3%), 100 nM human (16–23)-obestatin ( 5 ; 34±3%) and 100 nM mouse obestatin ( 6 ; 35±1%). The BrdU incorporation was expressed as the fold change relative to the level in FBS-treated cells in the positive control (mean ± SE). The data are expressed as the mean ± SE. The asterisk (*) denotes P <0.05 when comparing the peptide-treated ARPE-19 cells groups with the human obestatin ( 1 )-treated group.
Article Snippet: Human obestatin ( 1 ) and mouse obestatin ( 6 ) were obtained from California Peptide Research Inc. (Napa, CA, US).
Techniques: Expressing, Positive Control, BrdU Incorporation Assay