Nan fang yi ke da xue xue bao = Journal of Southern Medical University · 2026
[Selenocystine inhibits colon cancer cell growth by promoting reactive oxygen species generation to trigger oxidative damage].
Аннотация на английскомСтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Song Qile, Miao Yikai, Feng Xiaotong, Wang Yifan, Liu Wei, Wei Qi, Yu Xinru, Chen Wenwen, Fu Xiaoyan
Аннотация
OBJECTIVES: To explore the molecular mechanism by which selenocystine (SeC) inhibits colon cancer cell growth in vitro.
METHODS: Colon cancer cells (RKO, HCT-116, and LoVo) were cultured and treated with 5, 10, or 20 μmol/L SeC for 24 h and 48 h. MTT assay was used to detect the cell viability, and wound healing assay was used to examine changes in cell migration. Flow cytometry with PI staining was used to analyze cell cycle arrest and apoptosis. Fluorescence probes were employed to monitor reactive oxygen species (ROS) generation, mitochondrial morphology and membrane potential, and the changes in ferroptosis were evaluated by detecting malondialdehyde (MDA), glutathione (GSH) and ferrous ion (Fe2+) levels; Western blotting was used to detect the changes in protein expressions.
RESULTS: SeC at all the 3 doses significantly inhibited proliferation and migration of colon cancer cells, down-regulated the expression of cell cycle-related proteins CDK2 and CDK4 and activated the apoptotic proteins PARP and caspase-9. Western blotting showed that SeC decreased the expression of ferroptosis proteins FTH1 and xCT and increased the expression of DMT1. The levels of MDA and Fe2+ were increased and GSH level was decreased in SeC-treated cells. Fluorescence staining results showed that SeC treatment induced mitochondrial structure damages and promoted cellular ROS production. SeC treatment also increased phosphorylation of oxidative damage proteins and lowered the expression levels of NRF2 and HO-1 proteins. ROS scavenger significantly reversed the up-regulation of DMT1, PARP and p-H2A.X protein induced by SeC in colon cancer cells.
CONCLUSIONS: SeC induces apoptosis and ferroptosis of colon cancer cells by promoting ROS generation and initiating oxidative damage, suggesting the potential of SeC as a potential chemotherapeutic agent for colon cancer.
METHODS: Colon cancer cells (RKO, HCT-116, and LoVo) were cultured and treated with 5, 10, or 20 μmol/L SeC for 24 h and 48 h. MTT assay was used to detect the cell viability, and wound healing assay was used to examine changes in cell migration. Flow cytometry with PI staining was used to analyze cell cycle arrest and apoptosis. Fluorescence probes were employed to monitor reactive oxygen species (ROS) generation, mitochondrial morphology and membrane potential, and the changes in ferroptosis were evaluated by detecting malondialdehyde (MDA), glutathione (GSH) and ferrous ion (Fe2+) levels; Western blotting was used to detect the changes in protein expressions.
RESULTS: SeC at all the 3 doses significantly inhibited proliferation and migration of colon cancer cells, down-regulated the expression of cell cycle-related proteins CDK2 and CDK4 and activated the apoptotic proteins PARP and caspase-9. Western blotting showed that SeC decreased the expression of ferroptosis proteins FTH1 and xCT and increased the expression of DMT1. The levels of MDA and Fe2+ were increased and GSH level was decreased in SeC-treated cells. Fluorescence staining results showed that SeC treatment induced mitochondrial structure damages and promoted cellular ROS production. SeC treatment also increased phosphorylation of oxidative damage proteins and lowered the expression levels of NRF2 and HO-1 proteins. ROS scavenger significantly reversed the up-regulation of DMT1, PARP and p-H2A.X protein induced by SeC in colon cancer cells.
CONCLUSIONS: SeC induces apoptosis and ferroptosis of colon cancer cells by promoting ROS generation and initiating oxidative damage, suggesting the potential of SeC as a potential chemotherapeutic agent for colon cancer.