Establishment of MUi030-A: A human induced pluripotent stem cell line carrying homozygous L444P mutation in the GBA1 gene to study type-3 Gaucher disease

Gaucher disease (GD) is a common lysosomal storage disease resulting from mutations in the glucocerebrosidase (GBA1) gene. This genetic disorder manifests with symptoms affecting multiple organs, yet the underlying mechanisms leading to pathology remain elusive. In this study, we successfully generated the MUi030-A human induced pluripotent stem cell (hiPSC) line using a non-integration method from a male type-3 GD patient with a homozygous c.1448T>C (L444P) mutation. These hiPSCs displayed a normal karyotype and pluripotency markers and the remarkable ability to differentiate into cells representing all three germ layers. This resourceful model holds significant promise for illuminating GD's underlying pathogenesis.

MALAT1 Decreases the Sensitivity of Head and Neck Squamous Cell Carcinoma Cells to Radiation and Cisplatin

BACKGROUND/AIM

Two-thirds of head and neck squamous cell carcinoma (HNSCC) patients present with locally advanced (LA) stages and have a poor survival rate. The aim of this study was to investigate the roles of the long non-coding RNAs MALAT1 on radiation and cisplatin sensitivity of HNSCC cells.

MATERIALS AND METHODS

Clonogenic, cell viability, and apoptosis assays were performed in cells following MALAT1 knockdown using CRISPR/Cas9 system.

RESULTS

MALAT1 was overexpressed in HNSCC cell lines as compared to a non-tumorigenic cell line. The number of colonies formed after radiation was significantly reduced in MALAT1 knockdown cells. The IC₅₀ value of cisplatin in MALAT1 knockdown cells was lower than that of the control cells. MALAT1 knockdown resulted in cell cycle arrest at G₂/M phase, DNA damage and apoptotic cell death.

CONCLUSION

MALAT1 knockdown enhanced the sensitivity of HNSCC cells to radiation and cisplatin partly through the induction of G₂/M cell cycle arrest resulting in DNA damage and apoptosis.