Journal: The journal of sexual medicine
Article Title: Heparin-binding epidermal growth factor-like growth factor improves erectile function in streptozotocin-induced diabetic mice.
doi: 10.1093/jsxmed/qdae079
Figure Lengend Snippet: Figure 1. Expression of HB-EGF is decreased under diabetic conditions. (A) Double-immunofluorescence staining of PECAM-1/HB-EGF (top panel) and NG2/HB-EGF (bottom panel) in penile tissues of age-matched control and diabetic mice. Nuclei were stained with DAPI (blue). Scale bar, 100 μm. (B) Representative Western blots for PECAM-1, NG2, and HB-EGF in corpus cavernosum tissue from age-matched control and diabetic mice. (C) Representative Western blots for HB-EGF in MCECs, and MCPs exposed to NG and HG conditions. (D-F) Normalized areas of PECAM-1, NG2, and HB-EGF–immunopositive staining were quantified using ImageJ software (n = 4). (G-K) Normalized band intensity values for indicated targets were quantified using ImageJ software (n = 4). Results are presented as mean ± SEM. ∗∗P < .01; ∗∗∗P < .001. The relative ratio of the control or NG group was arbitrarily set to 1. DAPI, 4′,6-diamidino-2-phenylindole; DM, diabetes mellitus; HB-EGF, heparin-binding epidermal growth factor–like growth factor; HG, high glucose; MCEC, mouse cavernous endothelial cell; MCP, mouse cavernous pericyte; NG, normal glucose; PECAM-1, platelet/endothelial adhesion molecule 1.
Article Snippet: For immunofluorescence analysis, penis tissues were fixed in 4% paraformaldehyde at 4◦C for 24 hours, and cell samples were fixed in 4% paraformaldehyde at 4◦C for 15 minutes at room temperature, as described previously.21 Frozen tissue sections (12 μm thick), MCECs, and MCPs were washed and then incubated overnight at 4◦C with the following antibodies: primary antibody against HB-EGF (1:100, Santa Cruz Biotechnology Inc., Dallas, TX, United States), platelet/endothelial adhesion molecule 1 (PECAM1; 1:100; Millipore, Temecula, CA, United States), NG2 (1:50; Millipore), phosphohistone H3 (1:50; Millipore), neuronal NOS (nNOS; 1:100; Santa Cruz Biotechnology Inc.), neurofilament (1:50; Sigma-Aldrich), occludin (1:100; Novus Biologicals, Littleton, CO, United States), claudin-5 (1:100; Invitrogen, Carlsbad, CA, United States), oxidized low-density lipoprotein (Ox-LDL: 1:100; Abcam, Cambridge, MA, United States), and phospho-eNOS (1:50; Invitrogen).
Techniques: Expressing, Staining, Control, Western Blot, Software, Binding Assay