Exponentially growing mouse erythroleukemia (MEL) cells and quiescent human peripheral blood lymphocytes (PBL) were treated with different concentrations of the nonprotein amino acid mimosine for 16 h. The treatment of the cycling cell population with 400 microM mimosine caused inhibition of DNA replication, changes in the progression of the cells in the cell cycle, and apoptosis. Nucleoid sedimentation analysis and comet assay were used to monitor the appearance and accumulation of DNA breaks. The rate of break accumulation was dose-dependent, did not depend on the stage of the cell cycle and was not connected with the mechanism of DNA replication. The data indicate that the effects of mimosine on DNA synthesis and the cell cycle may be a result of introduction of breaks into DNA.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0921-8777(00)00007-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Identification of novel cyclin-dependent kinase 4/6 inhibitors from marine natural products.
PLoS One
January 2025
Department of Dravyaguna, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India.
Cyclin-dependent kinases 4 and 6 (CDK4/6) are crucial regulators of cell cycle progression and represent important therapeutic targets in breast cancer. This study employs a comprehensive computational approach to identify novel CDK4/6 inhibitors from marine natural products. We utilized structure-based virtual screening of the CMNPD database and MNP library, followed by rigorous filtering based on drug-likeness criteria, PAINS filter, ADME properties, and toxicity profiles.
View Article and Find Full Text PDFStress Granule Induction in Rat Retinas Damaged by Constant LED Light.
Invest Ophthalmol Vis Sci
January 2025
Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Biológica Ranwel Caputto. Córdoba, Argentina.
Purpose: Stress granules (SGs) are cytoplasmic biocondensates formed in response to various cellular stressors, contributing to cell survival. Although implicated in diverse pathologies, their role in retinal degeneration (RD) remains unclear. We aimed to investigate SG formation in the retina and its induction by excessive LED light in an RD model.
View Article and Find Full Text PDFOcrelizumab dose selection for treatment of pediatric relapsing-remitting multiple sclerosis: results of the OPERETTA I study.
J Neurol
January 2025
Division of Child Neurology, Children's Hospital of Philadelphia, Departments of Neurology and Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Background: The presented study identified the appropriate ocrelizumab dosing regimen for patients with pediatric-onset multiple sclerosis (POMS).
Methods: Patients with POMS aged 10-17 years were enrolled into cohort 1 (body weight [BW] < 40 kg, ocrelizumab 300 mg) and cohort 2 (BW ≥ 40 kg, ocrelizumab 600 mg) during a 24-week dose-exploration period (DEP), followed by an optional ocrelizumab (given every 24 weeks) extension period.
Primary Endpoints: pharmacokinetics, pharmacodynamics (CD19 B-cell count); secondary endpoint: safety; exploratory endpoints: MRI activity, protocol-defined relapses, Expanded Disability Status Scale (EDSS) score change.
Long-term cultivation of retinal pigment epithelium cells on nanofiber scaffolds.
Graefes Arch Clin Exp Ophthalmol
January 2025
Department of Ophthalmology, University Hospital Munster, Munster, Germany.
Purpose: The retinal pigment epithelium (RPE) plays an important role in the pathogenesis of age-related macular degeneration (AMD) and other retinal degenerative diseases. The introduction of healthy RPE cell cultures into the subretinal space offers a potential treatment strategy. The aim of this study was the long-term culture and characterisation of RPE cells on nanofiber scaffolds.
View Article and Find Full Text PDFClassical cell cycle kinase limits tubulin polyglutamylation and cilium stability.
J Cell Biol
February 2025
Department of Molecular and Cell Biology, University of California, Merced, Merced, CA, USA.
Tubulin polyglutamylation is essential for maintaining cilium stability and function, and defective tubulin polyglutamylation is associated with ciliopathies. However, the regulatory mechanism underlying proper axonemal polyglutamylation remains unclear. He et al.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!