Kruppel-like factor 2 regulates thymocyte and T-cell migration
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.Kruppel-like factor 2 (KLF2) is crucial for T-cell trafficking. This study reveals KLF2 licenses mature T cells to exit the thymus and recirculate through lymphoid tissues by regulating key receptor expression.
Area Of Science
- Immunology
- Molecular Biology
- Cell Biology
Background
- Mammalian Kruppel-like transcription factors (KLFs) regulate tissue differentiation.
- Kruppel-like factor 2 (KLF2) deficiency causes T-cell pool loss, suggesting roles in quiescence and survival.
Purpose Of The Study
- To investigate the role of KLF2 in T-cell trafficking.
- To determine the molecular mechanisms by which KLF2 influences T-cell migration.
Main Methods
- Analysis of KLF2-deficient (Klf2-/-) thymocytes.
- Assessment of receptor expression (S1P1, CD62L, beta7 integrin).
- Kruppel-like factor 2 (KLF2) promoter binding and transactivation assays for S1P1.
Main Results
- Klf2-/- thymocytes exhibit impaired expression of receptors essential for emigration and trafficking.
- KLF2 directly binds and activates the promoter of the sphingosine-1-phosphate (S1P) receptor S1P1.
- S1P1 is critical for thymocyte egress and recirculation in lymphoid organs.
Conclusions
- KLF2 is essential for T-cell trafficking from the thymus.
- KLF2 acts as a licensing factor for mature T-cell recirculation.
- Regulation of S1P1 and other trafficking receptors by KLF2 is key to T-cell migration.
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
Related Concept Videos
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
General Mechanism
Generally, cellular migration begins when a cell, such as a fibroblast, responds to an...
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
In most mammals, females have two X chromosomes (XX) while males have an X and a Y chromosome (XY). The X chromosome contains significantly more genes than the Y chromosome. Therefore, to prevent an excess of X chromosome-linked gene expression in females, one of the two X chromosomes is randomly silenced during early development....
pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...