Cortactin contributes to the tumorigenesis of gastric cancer by activating ERK/MMP pathway

Flavokawain A suppresses the malignant progression of neuroblastoma in vitro depending on inactivation of ERK/VEGF/MMPs signaling pathway

BACKGROUND

Neuroblastoma (NB), the most common extracranial solid tumor in children, is featured by high malignancy and poor prognosis. Flavokawain A (FKA), a novel chalcone isolated from the roots of the kava plant, has been identified to exert the tumor-inhibiting properties in various cancers. The present study was formulated to tell about the anticarcinogenic effects of FKA against NB and to thoroughly elucidate the intrinsic molecular mechanisms.

METHODS

In this work, for functional experiments, SK-N-SH cells were treated with various concentrations (0, 12.5, 25, 50 μM) of FKA in order to expound the tumor-inhibiting functions of FKA on proliferative ability, clone-forming ability, apoptosis, cell cycle arrest, migratory ability, invasive ability, EMT and in vitro angiogenesis of NB cells. Moreover, to probe into the intrinsic molecular mechanisms underlying the tumor-inhibiting functions of FKA in NB cells, FKA-treated SK-N-SH cells were co-treated with ERK activator LM22B-10 for rescue experiments.

RESULTS

In our current work, it was verified that FKA treatment suppressed the proliferative and clone-forming abilities of NB cells, facilitated NB cell apoptosis, arrested NB cell cycle as well as inhibited NB cell migration, invasion, EMT and in vitro angiogenesis in a dose-dependent manner. What's more, molecular docking predicted the compound-protein interaction between FKA and ERK and biotin pull-down assay validated the binding of FKA to ERK. FKA targeted on ERK and acted as an inhibitor of ERK to inactivate ERK/VEGF/MMPs signaling pathway. Treatment with ERK activator LM22B-10 partially abolished the tumor-inhibiting functions of FKA in NB.

CONCLUSION

Overall, FKA may suppress the malignant behaviors of NB cells depending on inactivation of ERK/VEGF/MMPs signaling pathway.

Fanconi Anemia Complementary Group A (FANCA) Facilitates the Occurrence and Progression of Liver Hepatocellular Carcinoma

BACKGROUND

Liver hepatocellular carcinoma (LIHC) is a serious liver disease worldwide, and its pathogenesis is complicated.

AIMS

This study investigated the potential role of FANCA in the advancement and prognosis of LIHC.

METHODS

Public databases, quantitative reverse transcription polymerase chain reaction (qRT-PCR), western blot (WB) and immunohistochemistry (IHC) were employed to measure FANCA expression between tumor and normal samples. The relationship between FANCA expression and prognosis of LIHC patients were examined. Functional enrichment of FANCA-related genes was performed. Furthermore, univariate and multivariate analyses were conducted to determine the independent prognosis value of FANCA in LIHC. Finally, influence of FANCA knockout on the proliferation, migration, and invasion of HepG2 cell was validated with cloning formation, CCK8, and Transwell assays.

RESULTS

Expression analysis presented that FANCA had high expression level in LIHC tissues and cells. Receiver operating characteristic (ROC) curve analysis showed that FANCA was of great diagnosis value in LIHC. Clinicopathological analysis revealed that FANCA was significantly greater expressed in the advanced stage than in the early stage of LIHC. Univariate, multivariate, and Kaplan-Meier survival analysis confirmed that high expression of FANCA was strongly associated with poor survival of LIHC patients. In addition, high level of FANCA in LIHC showed a negative association with immunoinfiltrated B cells, T cells, and stromal scores. Moreover, Knockout of FANCA significantly inhibited HepG2 cell proliferative activity, migration, and invasion ability.

CONCLUSIONS

Our data revealed that high level of FANCA was closely associated with LIHC malignant progression, suggesting its potential utility as a diagnostic, predictive indicator, and therapeutic target.