The Proliferation of Chang Liver Cells After Simulated Microgravity Induction

This study aimed to assess the recovery capability of Chang liver cells (CCL-13) following simulated microgravity (SMG) induction. CCL-13 cells were cultured under SMG conditions for 72 h, and control group cells were cultured under 1G conditions for an identical duration. Cells from the SMG and control groups were further cultured under 1G conditions and assessed after 24 h and 72 h intervals in the gravity recovery experiment. The WST1 results indicated that CCL-13 proliferation was more evident in the control group than in the SMG group after both the 24 h and 72 h intervals. The control group had a lower percentage of CCL-13 cells in the G0/G1 phase compared with the SMG group at both time points, and it exhibited a higher total percentage of cells in the S and G2/M phases. The control group exhibited elevated levels of cell-cycle-related proteins, including cyclin A, cyclin D, and cdk6, compared with the SMG group. The flow cytometry results revealed that the apoptotic rate in the control group was significantly lower than that in the SMG group at both the 24 h and 72 h time points. However, the apoptotic percentage in the SMG group at the 72-h mark was significantly lower than that at the 24-h mark. SMG reduces the viability and proliferation ability of CCL-13 cells. After a period of recovery and adaptation to normal gravity conditions (1G), the CCL-13 cells in the SMG group showed better signs of recovery after 72 h than after 24 h.