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Objective:To investigate whether the cell adhesion molecule integrin aV could influence the radiosensitivity of human nasopharyngeal carcinoma CNE-2Z cells via effecting intercellular effect.Methods:Human NPC cell line CNE-2Z was cultivated as three dimensional modef using liquid overlay technique.Cell counting was employed to detect the radiosensitivity of CNE-2Z cells by blood cell counter before and after blocking integrin aV function;cell apoptosis was detected by flow cytometry using Annexin V/PI label.Results:Three dimensional culture model of human NPC cell line CNE-2Z cells were successfully established The integrin aV expression of CNE-2Z multicellular spheroids elevated as the dosage of radiotherapy increased.Blocking of integrin aV function leaded to higher radiosensitivity and more apoptotic cells of CNE-2Z multicellular spheroids.Conclusion:Cell adhesion molecules integrin aV can influence the radiosensitivity of human nasopharyngeal carcinoma CNE-2Z cells and the inhibition of cell apoptosis might be its mechanism.proved by three dimensional culture model to mimic solid tumor in vivo.