biostudies-literatureUnknown16Xu XThe relationship between calcium oscillation and cell sensitivity is poorly understood. Calcium oscillation can occur spontaneously or be triggered upon receptor-ligand binding. The cytosolic [Ca²⁺] increase during calcium oscillation is initiated from Ca²⁺ release from the intracellular stores through the phospholipase C (PLC)-derived inositol 1,4,5-trisphosphate (IP₃). Here, we show that neutrophil-like HL60 cells lacking PLCγ2 (<i>plcg2^kd</i> ) exhibit impaired spontaneous calcium oscillation and a diminished calcium response to chemoattractant stimulation. These defects result in reduced membrane targeting of RasGAP CAPRI (calcium-promoted Ras inactivator), and subsequent elevated Ras activations and enhanced downstream signaling, including PFrontiers in immunology1633390https://www.ebi.ac.uk/biostudies/studies/S-EPMC12354650biostudies-literaturePLCγ2 controls neutrophil-like cell sensitivity through calcium oscillation and gates chemoattractant concentration range for chemotaxis.PMC12354650Lee AJin TKim WSXu XfalsePLCγ2 controls neutrophil-like cell sensitivity through calcium oscillation and gates chemoattractant concentration range for chemotaxis.The relationship between calcium oscillation and cell sensitivity is poorly understood. Calcium oscillation can occur spontaneously or be triggered upon receptor-ligand binding. The cytosolic [Ca²⁺] increase during calcium oscillation is initiated from Ca²⁺ release from the intracellular stores through the phospholipase C (PLC)-derived inositol 1,4,5-trisphosphate (IP₃). Here, we show that neutrophil-like HL60 cells lacking PLCγ2 (<i>plcg2^kd</i> ) exhibit impaired spontaneous calcium oscillation and a diminished calcium response to chemoattractant stimulation. These defects result in reduced membrane targeting of RasGAP CAPRI (calcium-promoted Ras inactivator), and subsequent elevated Ras activations and enhanced downstream signaling, including P2025-01-01T00:00:00Z20252026-05-02T02:47:18.573Z2026-04-07T17:34:41.812ZS-EPMC123546504082180810.3389/fimmu.2025.1633390