PTP4A3 and gastric cancer: Whereas in both LoVo-P cells and gastric cancer cells BGC823 stably expressing PRL-3 (BGC823-P), which have detectable integrin α1 on the cell membrane, we observed PRL-3-integrin β1 interaction (data not shown), suggesting that such interaction might be indirect and integrin α1-independent, at least for these two cell lines.