Video Experimental Relacionado
Updated: Jun 27, 2026

06:40
Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage
Published on: October 21, 2015
Las mutaciones que involucran al factor de transcripción CBFA1 causan displasia cleidocraneal
1Kinderklinik, Klinikum der Johannes-Gutenberg-Universität, Mainz, Germany.
Cell
|May 30, 1997
Resumen
Las mutaciones en el gen CBFA1 causan displasia cleidocraneal (DCC), un trastorno esquelético. La pérdida heterocigótica de la función en CBFA1 es suficiente para causar esta condición.
Área de la Ciencia:
- Genética La genética.
- Biología Molecular Biología Molecular
- Displasias esqueléticas Las displasias esqueléticas.
Sus antecedentes:
- La displasia cleidocraneal (DCC) es un trastorno esquelético autosómico dominante.
- Las características clave incluyen hipoplasia clavicular, fontanillas patentes y dientes supernumerarios.
Objetivo del estudio:
- Para investigar la base genética de la displasia cleidocraneal.
- Determinar el papel del gen CBFA1 en la patogénesis de la CCD.
Principales métodos:
- Análisis del ADN del paciente en busca de mutaciones en el gen CBFA1.
- Análisis de segregación de las alteraciones genéticas dentro de las familias afectadas.
Principales resultados:
- Se identificaron eliminaciones que conducen a la pérdida heterocigótica de CBFA1 en algunas familias.
- Se encontraron varias mutaciones (inserciones, deleciones, malentendidos) que afectan la función del CBFA1.
- Una expansión de polialanina en el marco en CBFA1 segregado con CCD en una familia.
Conclusiones:
- Las mutaciones CBFA1 son la causa de la displasia cleidocraneal.
- La pérdida heterocigótica de la función de CBFA1 es suficiente para causar CCD.
- CBFA1 es crucial para el desarrollo esquelético.
Videos de Conceptos Relacionados
Mutations
Overview
Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Transcription Factors
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...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Master Transcription Regulators
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...
General Transcription Factors
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...

