La resistencia a la inflamación subyace a una mejor aptitud en la hematopoyesis clonal
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
Ver abstracta en PubMed
Resumen
Este resumen es generado por máquina.Las células madre y progenitoras hematopoyéticas mutadas (HSPC) obtienen una ventaja de aptitud, lo que lleva a la hematopoyesis clonal. Esta expansión es impulsada por mutaciones que alteran la expresión génica inflamatoria, confiriendo resistencia a la inflamación.
Área De La Ciencia
- Hematología
- Inmunología
- La genética
Sus Antecedentes
- La hematopoyesis clonal, impulsada por mutaciones en las células madre y progenitoras hematopoyéticas (HSPC), conduce a una mayor aptitud de los clones mutantes.
- Los mecanismos subyacentes a la expansión de estos clones mutantes aún no se comprenden por completo.
Objetivo Del Estudio
- Investigar cómo las mutaciones adquiridas influyen en la aptitud clonal dentro del entorno de la médula ósea nativa.
- Aclarar el papel de genes específicos, como el ASXL1, en la promoción de la dominación clonal en la hematopoyesis.
Principales Métodos
- Desarrollo de una nueva técnica que combina la mutagénesis de mosaico con el etiquetado en color de las HSPC.
- Análisis de transcripción de una sola célula para evaluar cambios en la expresión génica en clones mutantes.
- Investigando el impacto de la función del gen NR4A1 en la expansión clonal.
Principales Resultados
- Se encontró que las mutaciones en ASXL1 promueven la dominación clonal en la hematopoyesis.
- Los clones mutantes exhibieron una expresión génica alterada: proinflamatoria en las células mieloides maduras y antiinflamatoria en las células progenitoras.
- La pérdida de la función NR4A1 abrogó el dominio clonal de los clones mutantes ASXL1.
Conclusiones
- La aptitud clonal en la hematopoyesis está significativamente influenciada por mutaciones que modulan las vías de señalización inflamatoria.
- Los HSPC mutantes pueden alcanzar la dominación desarrollando resistencia a las señales inflamatorias originadas en su propia descendencia.
Contact us Si estos videos no son relevantes.
Contact us Si estos videos no son relevantes.
Videos de Conceptos Relacionados
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...