Ductal obstruction promotes formation of preneoplastic lesions from the pancreatic ductal compartment


Cheng T., Zhang Z., Jian Z., Raulefs S., Schlitter A. M. , Steiger K., ...Daha Fazla

INTERNATIONAL JOURNAL OF CANCER, cilt.144, ss.2529-2538, 2019 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 144 Konu: 10
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1002/ijc.31981
  • Dergi Adı: INTERNATIONAL JOURNAL OF CANCER
  • Sayfa Sayıları: ss.2529-2538

Özet

Pancreatitis is a significant risk factor for pancreatic ductal adenocarcinoma (PDAC). Previous studies in mice have demonstrated that pancreatitis contributes to oncogenic Kras-driven carcinogenesis, probably initiated in acinar cells; however, oncogenic Kras alone or in combination with caerulein-induced pancreatitis is not sufficient in initiating PDAC from the ductal compartment. We thus introduced ductal obstruction - which induces a more severe form of pancreatitis - by pancreatic ductal ligation in mice harbouring oncogenic Kras. This induced a particular phenotype with highly proliferative nonmucinous cells with nuclear atypia. Around these lesions, there was a significant proliferation of activated fibroblasts and infiltration of immune cells, corroborating the pathological features of preneoplastic lesions. Lineage-tracing experiments revealed that these preneoplastic cells derived from two distinctive cellular sources: acinar and ductal cells. Phenotypic characterisation revealed that the duct-derived preneoplastic lesions show a high proliferative potential with persistent activation of tumour-promoting inflammatory pathways while the acinar-derived ones were less proliferative with persistent p53 activation. Furthermore, the duct-derived preneoplastic cells have a particularly high nuclear-to-cytoplasmic ratio. These data demonstrate that ductal obstruction promotes preneoplastic lesion formation from the pancreatic ductal compartment.