Figure 7. ICAM-2 inhibited colony growth in soft agar and development of disseminated tumors in vivo. ICAM-2 mAB8 delayed but did not inhibit development of disseminated tumors in an in vivo model of metastatic neuroblastoma.
(A) ICAM-2 WT, mAB4 and mAB8 suppressed anchorage-independent growth in vitro. Colonies of >20 cells were visualized 14–21 days after plating. Results were quantitated manually and analyzed using a two-tailed t-test and GraphPad Prism software (*P=0.0135 and ***P<0.0001). (B) Photomicrographs of representative colonies for Control and ICAM-2 WT transfectants were acquired at 400× magnification using a Dr-5 digital camera (Southern Microscope) mounted to a Nikon Eclipse TS100 inverted microscope and archived with TSView software (version 7.1.04, Tucsen Imaging Technology Co./Southern Microscope). (C) Kaplan-Meier survival plots of mice that received i.v. injections of SK-N-AS cell transfectants were analyzed by log-rank (Mantel-Cox) test using GraphPad Prism 5 software (Version 5.02) showed that mice receiving cells expressing mAB variants survived longer than mice receiving cells expressing no detectable ICAM-2, but not as long as mice receiving cells expressing ICAM-2 WT. *Data for control transfectants were previously published in BMC Cancer by BioMed Central25. Reprinted with permission.