Population depletion activates autonomous CD154-dependent survival in biopsylike Burkitt lymphoma cells
| العنوان: | Population depletion activates autonomous CD154-dependent survival in biopsylike Burkitt lymphoma cells |
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| المؤلفون: | Michelle J. Holder, Anita Chamba, John D. Pound, Alondra Schweizer Burguete, Aristides G. Eliopoulos, Anita Challa, Lawrence S. Young, Richard J. Armitage, Christopher D. Gregory, Gillian Grafton, Hector Martinez-Valdez, John R. Gordon |
| المصدر: | Blood. 99:3411-3418 |
| بيانات النشر: | American Society of Hematology, 2002. |
| سنة النشر: | 2002 |
| مصطلحات موضوعية: | Cell Survival, Biopsy, CD40 Ligand, Immunology, Population, Cell Count, Endogeny, Cell Communication, Biology, Biochemistry, Tumor Cells, Cultured, Humans, RNA, Messenger, CD154, education, Feedback, Physiological, education.field_of_study, CD40, Dose-Response Relationship, Drug, Population size, Cell Biology, Hematology, Burkitt Lymphoma, Phenotype, Clone Cells, Cell biology, Quorum sensing, Gene Expression Regulation, biology.protein, Clone (B-cell biology) |
| الوصف: | Population size is governed through cells reacting to a variety of intrinsic and extrinsic cues. Tumors, while liberated from many of the homeostatic constraints placed on physiologic counterparts, can nonetheless remain subject to both social and environmental control. Burkitt lymphoma cells faithful to the biopsy phenotype were used to model the reliance of the colony, if any, on an inbuilt population sensor. Below a normally suicidal threshold number of cells, low picomolar quantities of exogenous CD40 ligand (CD40L/CD154) were found to sustain the clone without the discernible shift in phenotype that accompanies high CD40L encounter. Although CD154 was undetectable in populous cultures, message was induced as numbers became limiting. Correspondingly, attempts to neutralize endogenous CD40L activity failed to perturb cells at optimal densities but resulted in their marked decline as the critical threshold was approached. These data reveal an auto-inducible survival mechanism seemingly regulated through the monitoring of population size, a process somewhat akin to that of “quorum sensing” among gram-negative bacteria in which diffusible molecules provide a means of communication to coordinate gene expression with population density. This process could be activated as cells discern depletions in their community or when deprived of signals otherwise furnished within an appropriate environmental niche. |
| تدمد: | 1528-0020 0006-4971 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb055a71f7a83ceb64bc270f589cacba https://doi.org/10.1182/blood.v99.9.3411 |
| رقم الأكسشن: | edsair.doi.dedup.....eb055a71f7a83ceb64bc270f589cacba |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15280020 00064971 |
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