CO2 Pneumoperitoneum Effects on Molecular Markers of Tumor Invasiveness in SH-SY5Y Neuroblastoma Cells

CO2 pneumoperitoneum effects on proliferation and apoptosis in two different neuroblastoma cell lines

PURPOSE

The proto-oncogene MYCN is considered a transcription factor involved in the regulation of neuroblastoma (NB) cell biology. Since minimally invasive-surgery represents a debated treatment of NB, we investigated CO₂ effects on proliferative activity and apoptotic pathway in two NB cell lines, SH-SY5Y (MYCN-non-amplified) and IMR-32 (MYCN-amplified).

METHODS

SH-SY5Y and IMR-32 were exposed to CO₂ (100%) at a pressure of 15 mmHg for 4 h and then moved to normal condition for 24 h. Cell proliferation, caspase 3 activity and transcript levels of BAX, BCL-2, cyclin B, cyclin D and MMP-2 were evaluated.

RESULTS

CO₂ exposure caused a decrease in cell proliferation associated to increases in BAX/BCL-2 ratio and caspase 3 activity in SH-SY5Y, while opposite effects have been found in IMR-32. CO₂ exposure induced a decrease of cyclin B1 in SH-SY5Y, while an increase in cyclin B1 and D1 was observed in IMR-32. A slight up-regulation of MMP-2 expression in SH-SY5Y and a significant increase of 2.2 folds in IMR-32 was observed (p < 0.05).

CONCLUSIONS

Our results suggest that CO₂ exposure may cause different effects on various NB cell lines, likely due to MYCN amplification status. Further in vitro and in vivo studies are needed to highlight the role of laparoscopy on NB behaviour.

Surgical Approaches to Neuroblastoma: Review of the Operative Techniques

Neuroblastoma (NB) is the most commonly occurring soft-tissue malignancy of childhood. Surgery plays an important role in multidisciplinary treatment and its principal aim is a local control of the disease, respecting the integrity of the surrounding structures. There is no unanimous consensus on the best surgical technique, and the operative approach largely depends on the anatomical location and the extension of the mass. To have a complete overview of the different type of treatment, we made a review of the literature from the last twenty years of all the surgical approaches applied for NBs resection, accordingly to the anatomical site.