Video Experimental Relacionado
Updated: Jul 17, 2026

08:48
Generating De Novo Antigen-specific Human T Cell Receptors by Retroviral Transduction of Centric Hemichain
Published on: October 25, 2016
Un mecanismo de hiperconversión genera el repertorio preinmune de la cadena ligera de pollo
Cell
|February 13, 1987
Resumen
La diversidad de la cadena ligera de pollo surge de un solo gen V lambda 1-J. Un grupo de pseudógenos facilita la diversificación de secuencias a través de la conversión de genes segmentales durante el desarrollo.
Área de la Ciencia:
- Inmunología Inmunología.
- Genética La genética.
- Biología Molecular Biología Molecular
Sus antecedentes:
- El repertorio de la cadena ligera de inmunoglobulina de pollo se genera a partir de una sola combinación reorganizada V lambda 1-J.
- Comprender la base genética de este repertorio limitado es crucial para la inmunología aviar.
Objetivo del estudio:
- Para determinar la información de codificación completa del pollo lambda locus.
- Para aclarar el mecanismo de la diversificación de la secuencia de la cadena ligera en pollos.
Principales métodos:
- Secuenciación del ADN del locus lambda.
- Análisis de genes V lambda 1 reorganizados de células embrionarias y bursáceas.
Principales resultados:
- El locus lambda del pollo contiene 25 elementos de hibridación V, todos identificados como pseudogenes.
- Estos pseudogenes se agrupan aguas arriba del gen funcional V lambda 1.
- El análisis de secuencias reveló un mecanismo de conversión de genes segmentales responsable de diversificar el gen V lambda 1.
Conclusiones:
- La diversificación de la cadena ligera de inmunoglobulinas de pollo se basa en la conversión génica entre un grupo de seudógenos y un solo gen V funcional.
- Este mecanismo permite la variación de la secuencia a pesar de un repertorio genético limitado de la línea germinal V.
Más Videos Relacionados
Videos de Conceptos Relacionados
Vaccinations
Overview
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Hybridoma Technology
Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
Hybridoma Selection
Commonly used fusion techniques — electroporation, polyethylene glycol...
Hybridoma Selection
Commonly used fusion techniques — electroporation, polyethylene glycol...
Cells of the Adaptive Immune Response
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
Diversity of Antigen Receptors
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
B Cell Activation and Differentiation
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...

