Expression of CD11a and CD18 in melanoma A375, 1205LU and SLM8 cell lines with conditioned medium. Cell-surface expression of CD11a and CD18 on indicated melanoma cell lines treated for 24 hrs with HUVEC conditioned medium was analyzed by flow cytometry. Isotypic controls are represented as empty histograms and specific antibody-labelling is displayed as shaded histograms. Histograms obtained with cells incubated with FCS-complete medium and labeled with specific antibodies, which overlap with the isotypic control are not shown. Data from obtained with 3 independent experiments.