Clinacanthus nutans Silver nanoparticle flow cytometry oral cancer 3T3 Cells 3T3 cell line ANTIBACTERIAL Acanthaceae Animals Antineoplastic Agents Apoptosis Apoptotic activity Article Carcinoma, Squamous Cell Cell Cycle Checkpoints Cell Line, Tumor Cell Proliferation Cell Survival Cell culture Cell cycle analysis Cell death Clinacanthus nutans extract Cytotoxic activities Cytotoxicity Flow cytometry Flow cytometry assays G1 phase cell cycle checkpoint G2 phase cell cycle checkpoint GREEN SYNTHESIS HSC-4 cell line