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Germline Single-Nucleotide Polymorphism Causes Alterations in Mitochondrial Metabolism and Leads to Increased ROS-Mediated DNA Damage in a Murine Model of Human Acute Myeloid Leukemia.
Biomedicines
January 2025
Department of Hematology and Oncology, University Cancer Center Schleswig-Holstein (UCCSH), University Hospital Schleswig-Holstein, 23562 Lübeck, Germany.
: GFI1-36N represents a single-nucleotide polymorphism (SNP) of the zinc finger protein Growth Factor Independence 1 (GFI1), in which the amino acid serine (S) is replaced by asparagine (N). The presence of the gene variant is associated with a reduced DNA repair capacity favoring myeloid leukemogenesis and leads to an inferior prognosis of acute myeloid leukemia (AML) patients. However, the underlying reasons for the reduced DNA repair capacity in leukemic cells are largely unknown.
View Article and Find Full Text PDFPhospho-Proteomics Analysis of Early Response to X-Ray Irradiation Reveals Molecular Mechanism Potentially Related to U251 Cell Radioresistance.
Proteomes
December 2024
UMR6252 CIMAP, Team Applications in Radiobiology with Accelerated Ions, CEA-CNRS-ENSICAEN, Université de Caen Normandie, 14000 Caen, France.
Glioblastoma (GBM) is a devastating malignant brain tumor with a poor prognosis. GBM is associated with radioresistance. Post-translational modifications (PTMs) such as protein phosphorylation can play an important role in the cellular response to radiation.
View Article and Find Full Text PDFDNA-Dependent Protein Kinase Catalytic Subunit Prevents Ferroptosis in Retinal Pigment Epithelial Cells.
Invest Ophthalmol Vis Sci
January 2025
Department of Ophthalmology of Tongji Hospital and Laboratory of Clinical and Visual Sciences of Tongji Eye Institute, School of Medicine, Tongji University, Shanghai, China.
Purpose: The purpose of this study was to investigate the activated core kinases involved in the DNA damage responses (DDR) during ferroptosis of retinal pigment epithelial (RPE) cells in vitro and their regulatory effects on ferroptosis.
Methods: Ferroptosis was induced by erastin in induced RPE (iRPE) cells derived from human umbilical cord mesenchymal stem cells (hUCMSCs), hUCMSCs, and induced pluripotent stem cell-derived RPE (iPSC-RPE) cells. CCK8 was employed to measure the cell viability.
PsDMAP1/PsTIP60-regulated H4K16ac is required for ROS-dependent virulence adaptation of on host plants.
Proc Natl Acad Sci U S A
January 2025
Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China.
Host plants and various fungicides inhibit plant pathogens by inducing the release of excessive reactive oxygen species (ROS) and causing DNA damage, either directly or indirectly leading to cell death. The mechanisms by which the oomycete manages ROS stress resulting from plant immune responses and fungicides remains unclear. This study elucidates the role of histone acetylation in ROS-induced DNA damage responses (DDR) to adapt to stress.
View Article and Find Full Text PDFB Chromosome Transcriptional Inactivation in the Spermatogenesis of the Grasshopper .
Genes (Basel)
November 2024
Departamento de Biología, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
Background/objectives: We analyzed the relationship between synapsis, recombination, and transcription during the spermatogenesis of the grasshopper carrying B chromosomes (type B1).
Methods: The progression of synapsis was interpreted according to the dynamics of the cohesin subunit SMC3 axes. DNA double-strand breaks were revealed by RAD51 immunolabeling, while transcriptional activity was determined by the presence of RNA polymerase II phosphorylated at serine 2 (pRNApol II) immunolabeling.
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