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Background/aim: Casticin shows anti-cancer effects in many types of cancer. However, there is no information regarding its role in DNA damage in human bladder cancer. The aim of this study was to investigate the effects of casticin on TSGH-8301 cells in vitro.
Materials And Methods: Viability of cells was assayed by flow cytometry. DNA damage was assayed by DAPI staining, comet assay, and gel electrophoresis. Protein levels were examined by western blotting and confocal laser microscopy.
Results: Casticin decreased viability of cells and induced DNA damage. Furthermore, casticin decreased expression of p-ATM, p-ATR, MDC1 and MGMT levels after 48 h of treatment, however, it increased p-ATR and MGMT levels after 12 h. In contrast, casticin increased the levels of p-p53, p-H2A.X, and PARP after 48 h of treatment. As shown by confocal microscopy, casticin affected the translocation of DNA-PKcs and p-p53 to the nucleus of TSGH-8301 cells.
Conclusion: Casticin decreased viability of human bladder cancer cells through DNA damage.
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http://dx.doi.org/10.21873/anticanres.13291 | DOI Listing |
Acta Pharmacol Sin
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Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
The anti-HER2 antibody‒drug conjugate (ADC) DS-8201 presents new hope for patients with advanced HER2-positive tumors. Its clinical application, however, is hindered by serious adverse reactions and reduced efficacy following long-term treatment. In this study, we investigated the factors influencing the sensitivity of DS-8201 and developed effective combination regimens to optimize its therapeutic efficacy.
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State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
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View Article and Find Full Text PDFSci Bull (Beijing)
August 2025
MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen Univ
Increased chromosomal instability impairs oocyte quality, contributing to female reproductive aging. The telomeric DNA damage response (DDR) is essential for genomic stability; however, how oocytes respond to telomeric damage remains elusive. Here, we observed that aged human germinal vesicle (GV) oocytes accumulated telomeric DNA damage.
View Article and Find Full Text PDFGenes Genet Syst
September 2025
Department of Molecular Biology, Graduate School of Pharmaceutical Sciences, Kyushu University.
In most eubacteria the initiator protein DnaA triggers chromosomal replication by forming an initiation complex at the origin of replication and also functions as a transcriptional regulator, coordinating gene expression with cell cycle progression. While DnaA-regulated genes are relatively well characterized in exponentially growing cells, its role in gene regulation during stationary phase remains insufficiently explored. Here, using an aquatic bacterium Caulobacter crescentus as a model, we show that C.
View Article and Find Full Text PDFToxicology
September 2025
Brown University, Department of Pathology and Laboratory Medicine, Providence, RI 02903, USA. Electronic address:
Mercury (Hg) is a global contaminant that is present in human diet as methylmercury (MeHg). Recent studies linked MeHg exposure with high risks of skin cancers. It is unknown whether MeHg is directly genotoxic in skin cells or able to enhance mutagenic effects of UV radiation.
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