Perineural invasion in pancreatic cancer: proteomic analysis and in vitro modelling.
VGF
microdissection
pancreatic cancer
perineural invasion
proteomics
Journal
Molecular oncology
ISSN: 1878-0261
Titre abrégé: Mol Oncol
Pays: United States
ID NLM: 101308230
Informations de publication
Date de publication:
05 2019
05 2019
Historique:
received:
16
05
2018
revised:
27
11
2018
accepted:
10
01
2019
pubmed:
29
1
2019
medline:
23
4
2020
entrez:
29
1
2019
Statut:
ppublish
Résumé
Perineural invasion (PNI) is a common and characteristic feature of pancreatic ductal adenocarcinoma (PDAC) that is associated with poor prognosis, tumor recurrence, and generation of pain. However, the molecular alterations in cancer cells and nerves within PNI have not previously been comprehensively analyzed. Here, we describe our proteomic analysis of the molecular changes underlying neuro-epithelial interactions in PNI using liquid chromatography-mass spectrometry (LC-MS/MS) in microdissected PNI and non-PNI cancer, as well as in invaded and noninvaded nerves from formalin-fixed, paraffin-embedded PDAC tissues. In addition, an in vitro model of PNI was developed using a co-culture system comprising PDAC cell lines and PC12 cells as the neuronal element. The overall proteomic profiles of PNI and non-PNI cancer appeared largely similar. In contrast, upon invasion by cancer cells, nerves demonstrated widespread plasticity with a pattern consistent with neuronal injury. The up-regulation of SCG2 (secretogranin II) and neurosecretory protein VGF (nonacronymic) in invaded nerves in PDAC tissues was further validated using immunohistochemistry. The tested PDAC cell lines were found to be able to induce neuronal plasticity in PC12 cells in our in vitro established co-culture model. Changes in expression levels of VGF, as well as of two additional proteins previously reported to be overexpressed in PNI, Nestin and Neuromodulin (GAP43), closely recapitulated our proteomic findings in PDAC tissues. Furthermore, induction of VGF, while not necessary for PC12 survival, mediated neurite extension induced by PDAC cell lines. In summary, here we report the proteomic alterations underlying PNI in PDAC and confirm that PDAC cells are able to induce neuronal plasticity. In addition, we describe a novel, simple, and easily adaptable co-culture model for in vitro study of neuro-epithelial interactions.
Identifiants
pubmed: 30690892
doi: 10.1002/1878-0261.12463
pmc: PMC6487729
doi:
Substances chimiques
Neoplasm Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1075-1091Informations de copyright
© 2019 The Authors. Published by FEBS Press and John Wiley & Sons Ltd.
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