AI Article Synopsis
- The study investigates how activation of the homologous recombinational repair pathway affects cell growth and division in corrected cells.
- Corrected cells initially experience a temporary halt in replication, showing few active replication templates, but do not undergo cell death or senescence.
- Over time, these cells regain normal growth rates similar to non-corrected cells, indicating that the initial stalling is not permanent and they can continue to multiply in the lab.
Article Abstract
We have previously shown that activation of the homologous recombinational repair pathway leads to a block of cell division in corrected cells, possibly through the activity of checkpoint proteins Chk1 and Chk2. In this study, we examine the long-term impact of this stalling on the growth of cells that have enabled gene repair events. Using a mutated eGFP gene as an episomal reporter, we show that corrected (eGFP-positive) cells contain only a few active replication templates 2 weeks after electroporation, yet do not display an apoptotic or senescent phenotype. By 6 weeks after electroporation, cells resume active replication with a cell cycle profile that is comparable to that of the non-corrected (eGFP-negative) population. These results indicate that the initial stalling is transient and eGFP-positive cells eventually resume a normal phenotypic growth pattern, allowing for passaging and expansion in vitro.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2083256 | PMC |
| http://dx.doi.org/10.1016/j.dnarep.2007.04.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Replication-incompetent VSV-based vaccine elicits protective responses against SARS-CoV-2 and influenza virus.
Sci Adv
January 2025
Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and influenza viruses lead to severe respiratory illnesses and death in humans, exacerbated in individuals with underlying health conditions, remaining substantial global public health concerns. Here, we developed a bivalent replication-incompetent single-cycle pseudotyped vesicular stomatitis virus vaccine that incorporates both a prefusion-stabilized SARS-CoV-2 spike protein lacking a furin cleavage site and a full-length influenza A virus neuraminidase protein. Vaccination of K18-hACE2 or C57BL/6J mouse models generated durable levels of neutralizing antibodies, T cell responses, and protection from morbidity and mortality upon challenge with either virus.
View Article and Find Full Text PDFA look beyond topography: Transient phenomena of cell division captured with high-speed in-line force mapping.
Sci Adv
January 2025
Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan.
Life on the nanoscale has been made accessible in recent decades by the development of fast and noninvasive techniques. High-speed atomic force microscopy (HS-AFM) is one such technique that shed light on single protein dynamics. Extending HS-AFM to effortlessly incorporate mechanical property mapping while maintaining fast imaging speed allows a look deeper than topography and reveal details of nanoscale mechanisms that govern life.
View Article and Find Full Text PDFDistinct checkpoint and homolog biorientation pathways regulate meiosis I in Drosophila oocytes.
PLoS Genet
January 2025
Waksman Institute, Rutgers, the State University of New Jersey, Piscataway, New Jersey, United States of America.
Mitosis and meiosis have two mechanisms for regulating the accuracy of chromosome segregation: error correction and the spindle assembly checkpoint (SAC). We have investigated the function of several checkpoint proteins in meiosis I of Drosophila oocytes. Increased localization of several SAC proteins was found upon depolymerization of microtubules by colchicine.
View Article and Find Full Text PDFInotodiol induces hepatocellular carcinoma apoptosis by activation of MAPK/ERK pathway.
PLoS One
January 2025
Heilongjiang University of Traditional Chinese Medicine, Harbin, Heilongjiang, China.
Hepatocellular carcinoma(HCC) has a high mortality and morbidity rate and seriously jeopardizes human life. Chemicals and chemotherapeutic agents have been experiencing problems such as side effects and drug resistance in the treatment of HCC, which cannot meet the needs of clinical treatment. Therefore, finding novel low-toxicity and high-efficiency anti-hepatocellular carcinoma drugs and exploring their mechanisms of action have become the current problems to be solved in the treatment of HCC.
View Article and Find Full Text PDFThe efficacy of novel biomarkers for the early detection and management of acute kidney injury: A systematic review.
PLoS One
January 2025
College of Medicine, King Faisal University, Alahsa, Saudi Arabia.
Acute kidney injury (AKI) is a frequent clinical complication lacking early diagnostic tests and effective treatments. Novel biomarkers have shown promise for enabling earlier detection, risk stratification, and guiding management of AKI. We conducted a systematic review to synthesize evidence on the efficacy of novel biomarkers for AKI detection and management.
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!