Affiliation:
1. Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering Tianjin University of Science and Technology Tianjin China
2. Postdoctoral Mobile Research Station Tianjin Medical University Tianjin China
Abstract
AbstractAs the most common selenium derivative, methylseleninic acid (MSA) has attracted wide attention. Its apoptotic induction ability and the possible molecular mechanism in human bladder cancer (BC) J82 and T24 cells were investigated in the present study. We found that the survival of J82 and T24 cells were inhibited in a dose‐dependent manner after MSA treatment. Propidium iodide (PI) staining and Annexin V‐fluorescein isothiocyanate/PI double staining clarified that MSA stocked cells at G2/M phase and caused apoptosis in J82 and T24 cells. Further, typical morphological features of apoptotic cells were also observed. Accumulation of reactive oxygen species (ROS) and loss of mitochondrial membrane potential were also detected by dichlorodihydrofluorescein diacetate and Rhodamin123 staining. Meanwhile, pretreatment with N‐acetylcysteine, an ROS scavenging agent, found that the apoptosis of BC cells induced by MSA was related to the production of ROS. Western blot analysis results showed that MSA interrupted Bax/Bcl‐2 balance, stimulated cytochrome c release into the cytoplasm, activated caspase‐9 and caspase‐3, and finally induced the apoptosis of the BC cells. These findings demonstrated that MSA was able to induce apoptosis in J82 and T24 cells through ROS‐mediated mitochondrial apoptosis.
Funder
China Postdoctoral Science Foundation
Subject
Health, Toxicology and Mutagenesis,Toxicology,Molecular Biology,Molecular Medicine,Biochemistry,General Medicine