Differential gene expression in growth factors, epithelial mesenchymal transition and chemotaxis in the diffuse type compared with the intestinal type of gastric cancer

Perrot‑Applanat,Martine; Vacher,Sophie; Pimpie,Cynthia; Chemlali,Walid; Derieux,Simon; Pocard,Marc; Bieche,Ivan

doi:10.3892/ol.2019.10392

Differential gene expression in growth factors, epithelial mesenchymal transition and chemotaxis in the diffuse type compared with the intestinal type of gastric cancer

Authors:
- Martine Perrot‑Applanat
- Sophie Vacher
- Cynthia Pimpie
- Walid Chemlali
- Simon Derieux
- Marc Pocard
- Ivan Bieche
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Affiliations: INSERM U965, Lariboisiere Hospital, University of Paris‑Diderot‑Paris 7, 75010 Paris, France, Department of Genetics, Pharmacogenomics Unit‑Institut Curie, University of Paris‑Descartes‑Paris 5, 75005 Paris, France, Department of Digestive and Oncology Surgery‑Lariboisiere Hospital, University of Paris‑Diderot‑Paris 7, 75010 Paris, France
Published online on: May 21, 2019 https://doi.org/10.3892/ol.2019.10392
Pages: 674-686
Copyright: © Perrot‑Applanat et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Gastric cancer (GC) is a highly heterogeneous disease and one of the major causes of cancer‑related mortality worldwide. Diffuse‑type gastric adenocarcinoma (or poorly cohesive‑ with independent cells) is characterized by aggressive behavior (rapid invasion, chemoresistance and peritoneal metastasis), as compared with intestinal‑subtype adenocarcinoma. Diffuse subtype GC additionally has a substantially increasing incidence rate in Europe and the USA, and was often associated with younger age. Our objective was to analyze the expression and clinical significance of genes involved in several signaling pathways in diffuse‑type GC. Tumors samples and non‑malignant gastric tissues were obtained from patients with GC (diffuse‑type and intestinal‑subtype adenocarcinoma). The expression of 33 genes coding for proteins involved in four categories, growth factors and receptors, epithelial‑mesenchymal transition, cell proliferation and migration, and angiogenesis was determined by reverse transcription‑quantitative polymerase chain reaction. The expression of 22 genes was significantly upregulated in diffuse‑type GC and two were downregulated (including CDH1) compared with normal tissues. Among these genes, acompared with intestinal‑subtype adenocarcinoma, diffuse‑type GC revealed elevated levels of IGF1 and IGF1R, FGF7 and FGFR1, ZEB2, CXCR4, CXCL12 and RHOA, and decreased levels of CDH1, MMP9 and MKI67. The expression of selected genes was compared with other genes and according to clinical parameters. Furthermore, TGF‑β expression was significantly increased in linitis, a sub‑population of diffusely infiltrating type associated with extensive fibrosis and tumor invasion. Our study identified new target genes (IGF1, FGF7, CXCR4, TG‑β and ZEB2) whose expression is associated with aggressive phenotype of diffuse‑type GC.

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