Video Experimental Relacionado
Updated: Aug 16, 2026
09:39
Enhanced Northern Blot Detection of Small RNA Species in Drosophila Melanogaster
Published on: August 21, 2014
Regulación de la gliogénesis en el sistema nervioso central por la vía de señalización JAK-STAT
A Bonni1, Y Sun, M Nadal-Vicens
1Division of Neuroscience, Children's Hospital, and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
Science (New York, N.Y.)
|October 23, 1997
Resumen
La vía citokínica del factor neurotrófico ciliar (CNTF) promueve el desarrollo de células gliales e inhibe la diferenciación neuronal en el cerebro. Específicamente, la vía de señalización Janus kinase-STAT controla el destino celular durante el desarrollo de los mamíferos.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
- La señalización celular de las células.
Sus antecedentes:
- La gliogénesis, la formación de células gliales, es crucial para el desarrollo del sistema nervioso central.
- Las citocinas juegan un papel importante en la regulación de la diferenciación celular durante el desarrollo.
Objetivo del estudio:
- Para aclarar el mecanismo por el cual el factor neurotrófico ciliar (CNTF) regula la gliogénesis en el desarrollo del cerebro de los mamíferos.
- Para identificar las vías de señalización específicas involucradas en la determinación del destino celular mediada por CNTF.
Principales métodos:
- Caracterización de la vía de señalización del receptor CNTF.
- Análisis de los efectos de las citoquinas en la diferenciación de las células precursoras de la corteza cerebral.
- Investigación de las vías de señalización del transductor de señal de Janus kinase y activador de la transcripción (JAK-STAT) y de la proteína quinasa activada por mitógeno Ras (MAPK).
Principales resultados:
- La activación del receptor CNTF promovió la diferenciación de los astrocitos al tiempo que inhibió la diferenciación neuronal de los precursores corticales.
- CNTF activó ambas vías JAK-STAT y Ras-MAPK en las células precursoras corticales.
- La vía de señalización JAK-STAT mejoró selectivamente la diferenciación del linaje glial.
Conclusiones:
- La señalización de citocinas, particularmente a través de la vía JAK-STAT, es un mecanismo clave que controla el destino celular durante el desarrollo del sistema nervioso central de los mamíferos.
- Este estudio proporciona información sobre la regulación molecular de las decisiones de destino de las células gliales frente a las neuronales.
Videos de Conceptos Relacionados
02:14GTPases and their Regulation
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins, also known...
Large G-proteins, also known...
02:14GTPases and their Regulation
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins, also known...
Large G-proteins, also known...
01:24Regulation of Angiogenesis and Blood Supply
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
01:07MAPK Signaling Cascades
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
01:20The JAK-STAT Signaling Pathway
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
01:16TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...