Bistability is a common mechanism to ensure robust and irreversible cell cycle transitions. Whenever biological parameters or external conditions change such that a threshold is crossed, the system abruptly switches between different cell cycle states. Experimental studies have uncovered mechanisms that can make the shape of the bistable response curve change dynamically in time. Here, we show how such a dynamically changing bistable switch can provide a cell with better control over the timing of cell cycle transitions. Moreover, cell cycle oscillations built on bistable switches are more robust when the bistability is modulated in time. Our results are not specific to cell cycle models and may apply to other bistable systems in which the bistable response curve is time-dependent.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7817062 | PMC |
| http://dx.doi.org/10.1371/journal.pcbi.1008231 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
mTOR Signaling Regulates Multiple Metabolic Pathways in Human Lung Fibroblasts After TGF-β and in Pulmonary Fibrosis.
Am J Physiol Lung Cell Mol Physiol
January 2025
Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637.
Idiopathic pulmonary fibrosis is a fatal disease characterized by the TGF-β-dependent activation of lung fibroblasts, leading to excessive deposition of collagen proteins and progressive replacement of healthy lung with scar tissue. We and others have shown that TGF-β-mediated activation of the Mechanistic Target of Rapamycin Complex 1 (mTORC1) and downstream upregulation of Activating Transcription Factor 4 (ATF4) promote metabolic reprogramming in lung fibroblasts characterized by upregulation of the de synthesis of glycine, the most abundant amino acid found in collagen protein. Whether mTOR and ATF4 regulate other metabolic pathways in lung fibroblasts has not been explored.
View Article and Find Full Text PDFTransplant and Nontransplant Salvage Therapy in Pediatric Relapsed or Refractory Hodgkin Lymphoma: The EuroNet-PHL-R1 Phase 3 Nonrandomized Clinical Trial.
JAMA Oncol
January 2025
Department of Paediatric Haematology, Oncology and Immunodeficiency, University Hospital Justus-Liebig University Giessen, Giessen, Germany.
Importance: The current standard-of-care salvage therapy in relapsed/refractory classic Hodgkin lymphoma (cHL) includes consolidation high-dose chemotherapy (HDCT)/autologous stem cell transplant (aSCT).
Objective: To investigate whether presalvage risk factors and fludeoxyglucose-18 (FDG) positron emission tomography (PET) response to reinduction chemotherapy can guide escalation or de-escalation between HDCT/aSCT or transplant-free consolidation with radiotherapy to minimize toxic effects while maintaining high cure rates.
Design, Setting, And Participants: EuroNet-PHL-R1 was a nonrandomized clinical trial that enrolled patients younger than 18 years with first relapsed/refractory cHL across 68 sites in 13 countries in Europe between January 2007 and January 2013.
MICAL2 Promotes Pancreatic Cancer Growth and Metastasis.
Cancer Res
January 2025
University of California, San Diego, La Jolla, CA, United States.
Pancreatic ductal adenocarcinoma (PDAC) remains one of the deadliest solid cancers; thus, identifying more effective therapies is a major unmet need. In this study, we characterized the super enhancer (SE) landscape of human PDAC to identify drivers of the disease that might be targetable. This analysis revealed MICAL2 as a super enhancer-associated gene in human PDAC, which encodes the flavin monooxygenase MICAL2 that induces actin depolymerization and indirectly promotes SRF transcription by modulating the availability of serum response factor coactivators myocardin-related transcription factors (MRTF-A and MRTF-B).
View Article and Find Full Text PDF[Clinical Impact of Current Variants in COVID-19 Patients: Clinical Characteristics in Variant EG.5].
Mikrobiyol Bul
October 2024
University of Health Sciences, Ankara Bilkent City Health Application and Research Center, Clinic of Medical Microbiology, Ankara, Türkiye.
The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus has mutated at a high rate since the beginning of the pandemic, leading to the formation of different variants. Alpha, Beta, Gamma, Delta and Omicron have emerged as concerning variants identified by the World Health Organization (WHO). The Omicron variant and its sublineages became dominant worldwide in 2022.
View Article and Find Full Text PDFEvaluation of the Mechanical and Biological Properties of Polycaprolactone Scaffolds Produced by a Material Extrusion 3D Printer or 3D Pen: A Novel Bone Repair Strategy.
J Biomed Mater Res B Appl Biomater
January 2025
Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, Republic of Korea.
Addressing the high cost and long cycle associated with the multistep digital restoration process involving 3D printing technology, we proposed the 3D pen as an innovative strategy for rapid bone repair. Capitalizing on the low melting point characteristic of polycaprolactone (PCL), we introduced, for the first time, the novel concept of directly constructing scaffolds at bone defect sites using 3D pens. In this in vitro study, we meticulously evaluated both the mechanical and biological properties of 3D pen-printed PCL scaffolds with six distinct textures: unidirectional (UNI) (0°, 45°, 90°), bidirectional (BID) (-45°/45°, 0°/90°), and concentric (CON).
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!