Lung Squamous Cell Carcinoma Cells Express Non-Canonically Glycosylated IgG that Activates Integrin-FAK Signaling

It is increasingly recognized that many human carcinomas express immunoglobulin (Ig) molecules that are distinct from B-cell-derived Ig and play important roles in cancer initiation, progression, and metastasis. However, the molecular mechanisms underlying the functions of cancer-derived Ig remain elusive. Here, we report that lung squamous cell carcinoma (LSCC) cells frequently express high levels of cancer IgG (CIgG) that is specifically recognized by a monoclonal antibody RP215. RP215 recognizes CIgG via a novel epitope that involves an N-glycan modification at a non-consensus site within the CH1 domain.

Source: Cancer Letters - May 17, 2018 Category: Cancer & Oncology Authors: Jingshu Tang, Jingxuan Zhang, Yang Liu, Qinyuan Liao, Jing Huang, Zihan Geng, Weiyan Xu, Zhengzuo Sheng, Gregory Lee, Youhui Zhang, Jinfeng Chen, Liang Zhang, Xiaoyan Qiu Tags: Original Articles Source Type: research