TY - JOUR T1 - Cytology-based Detection of Circulating Tumour Cells in Human Pancreatic Cancer Xenograft Models With <em>KRAS</em> Mutation JF - Anticancer Research JO - Anticancer Res SP - 6781 LP - 6789 DO - 10.21873/anticanres.14701 VL - 40 IS - 12 AU - YUKAKO ITO AU - ERIKO INOUE AU - YUKI MATSUI AU - SHINJI KOBUCHI AU - CHIAMI MOYAMA AU - KIKUKO AMAGASE AU - MAYUMI YOSHIMURA AU - YUZURU IKEHARA AU - SUSUMU NAKATA AU - HAYAO NAKANISHI Y1 - 2020/12/01 UR - http://ar.iiarjournals.org/content/40/12/6781.abstract N2 - Background/Aim: To examine the dynamics of circulating tumour cells (CTCs) in pancreatic cancer (PC), new mouse CTC models from human PC xenografts were developed. Materials and Methods: Orthotopic (pancreas) and heterotopic (subcutaneous) transplantation models using GFP-tagged SUIT-2 PC cells were prepared. Using a cytology-based CTC detection platform, CTCs and metastasis were compared. Results: The two types of orthotopic models, including the surgical transplantation model and the intraperitoneal injection model, showed a similar pattern of initial pancreatic tumour formation and subsequent development of peritoneal and hematogenous lung metastases. In the heterotopic model, only hematogenous lung metastasis was observed, and the number of CTCs and lung metastases was higher than that of the orthotopic model. Furthermore, KRAS mutation (G12D) was detected in CTCs. Conclusion: These orthotopic and heterotopic models clearly differ in terms of the pattern of metastasis and CTCs and therefore, would be useful PC models to investigate the effect of drug-therapy on CTCs and the role of KRAS mutation. ER -