Alpha‑fetoprotein can promote gastric cancer progression via upregulation of metastasis‑associated colon cancer 1

Mao,Xiang; Wang,Jun; Luo,Fen

doi:10.3892/ol.2022.13204

Alpha‑fetoprotein can promote gastric cancer progression via upregulation of metastasis‑associated colon cancer 1

Authors:
- Xiang Mao
- Jun Wang
- Fen Luo
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Affiliations: Department of General Surgery, Huashan Hospital, Shanghai 200040, P.R. China
Published online on: January 18, 2022 https://doi.org/10.3892/ol.2022.13204
Article Number: 84

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Abstract

High serum alpha‑fetoprotein (AFP) level is a predictor of poor prognosis in patients with gastric cancer (GC). AFP‑producing GC (AFP‑GC) is an aggressive subtype of GC characterized by a high incidence of liver metastasis and high c‑Met expression. High expression of metastasis‑associated colon cancer 1 (MACC1), which is the transcription activator of c‑Met, also predicts a poor prognosis of GC. c‑Met is known to be involved in tumor progression into malignant invasive phenotypes. Considering that high c‑Met expression is simultaneously positively correlated with high AFP and MACC1 expression levels and that high expression of AFP or MACC1 predicts poor prognosis in GC, we hypothesized that an interaction may exist between AFP and MACC1. In the present study, GC cell lines with AFP‑overexpression, MACC1‑downregulation and the combination of both transfections were used as experimental models. The relative mRNA and protein expression of c‑Met, AFP and MACC1 were analyzed using reverse transcription quantitative PCR and western blotting, respectively. Cell viability was evaluated using Cell Counting Kit‑8 assay. Cell invasion and cell migration were examined using Transwell migration assay with and without Matrigel, respectively. The results demonstrated that, compared with the control group, the mRNA and protein expression of MACC1was significantly elevated in the AFP‑overexpressed group and in the group with AFP overexpressed and MACC1 downregulated. Furthermore, a significantly enhanced cell viability, migration and invasion were observed in the AFP‑overexpressing group, whereas opposite effects were found in the MACC1‑downregulating group. In summary, the results from this study indicated that AFP may promote GC progression by stimulating MACC1. This finding may help illustrating the aggressive behaviors of GC in patients with high AFP serum level and AFP‑GC.

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