The role of STAT3 phosphorylation in regulating ferroptosis and its impact on cisplatin resistance in human osteosarcoma cells
10.19405/j.cnki.issn1000-1492.2025.09.014
- VernacularTitle:STAT3 磷酸化在铁死亡调控中的作用及其对人骨肉瘤细胞顺铂耐药的影响
- Author:
Xinping Wang
1
;
Linkuan Wang
1
;
Pengchao Hu
2
;
Yihua Shi
3
Author Information
1. Dept of Orthopedics，Postgraduate Union Training Base of Xiangyang No．1 People 's Hospital，School of Medicine， Wuhan University of Science and Technology，Xiangyang 441000; Dept of Central Laboratory，Xiangyang No．1 People 's Hospital Affiliated to Hubei University of Medicine，Xiangyang 441000
2. Dept of Central Laboratory，Xiangyang No．1 People 's Hospital Affiliated to Hubei University of Medicine，Xiangyang 441000
3. Dept of Orthopedics， Xiangyang No．1 People 's Hospital Affiliated to Hubei University of Medicine，Xiangyang 441000
- Publication Type:Journal Article
- Keywords:
human osteosarcoma cell;
ferroptosis;
cisplatin;
drug resistance;
STAT3 protein;
p-STAT3 protein
- From:
Acta Universitatis Medicinalis Anhui
2025;60(9):1670-1681
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the role of STAT3 phosphorylation in ferroptosis regulation and its impact on cisplatin resistance mechanisms in human osteosarcoma cells．
Methods:Human osteosarcoma HOS cells and cispl- atin-resistant HOS / DDP cells were treated with cisplatin ( 0. 5，1，2，4，8，16，32 mg / L) ，the ferroptosis inducer Erastin ( Era) ( 2 μmol / L) ，and / or the ferroptosis inhibitor Ferrostatin-1 ( Fer1) ( 10 μmol / L) ．Cell viability and proliferation were assessed using the Cell Counting Kit-8 ( CCK-8) and colony formation assays，and cell migration was evaluated via a scratch assay．Reactive oxygen species ( ROS) ，intracellular ferrous iron levels，mitochondrial membrane potential，mitochondrial function，malondialdehyde ( MDA) levels，and the reduced glutathione / oxi- dized glutathione ( GSH / GSSG) ratio were measured using commercial kits．The mRNA expression of ferroptosis- related genes was analyzed by quantitative reverse transcription polymerase chain reaction ( RT-qPCR) ．The protein levels of glutathione peroxidase 4 ( GPX4) ，solute carrier family 7 member 11 ( SLC7A11) ，phosphorylated STAT3 ( p-STAT3) ，and total STAT3 were determined by Western blot．
Results:With cisplatin treatment，HOS cells ex- hibited decreased cell viability，mitochondrial membrane potential，and GSH / GSSG ratio ( P＜0. 01) ，along with elevated levels of ROS，ferrous ion，and MDA content ( P ＜0. 01) ． The protein levels of GPX4 ( P ＜0. 01) ， SLC7A11，and p-STAT3 also decreased ( P ＜0. 05) ．Coadministration with the ferroptosis inhibitor Ferrostatin-1 ( Fer-1) reversed these aforementioned effects ( P ＜0. 05) ．In HOS / DDP cells，the mRNA levels of ferroptosis- suppressive genes ( GPX4，FTH1，SLC7A11，and AIFM2) were significantly higher than those in HOS cells ( P < 0. 05) ，whereas the expression of ferroptosis-promoting genes ( ACSL4 and PTGS2) was significantly lower ( P < 0. 05) ．The cisplatin-induced reductions in cell viability and mitochondrial membrane potential，as well as the in- creases in ROS，ferrous ion，and MDA levels，were less pronounced in HOS / DDP cells than in HOS cells．The SLC7A11 protein level showed no significant change． However，combined treatment with the ferroptosis inducer Erastin ( Era) resulted in significant decreases in viability，mitochondrial membrane potential，and the GSH / GSSG ratio in HOS / DDP cells ( P＜0. 05) ．Furthermore，the protein levels of p-STAT3，GPX4，and SLC7A11 were also markedly reduced ( P＜0. 05) ．
Conclusion:The activation of ferroptosis mediated by p-STAT3 enhances cisplatin sensitivity in HOS / DDP cells．
- Full text:2026032811510132148STAT3磷酸化在铁死亡调控中的作用及其对人骨肉瘤细胞顺铂耐药的影响_王新平.pdf
