Video Experimental Relacionado
Updated: Aug 9, 2025

10:28
Author Spotlight: RNAi Inheritance and ChIP in C. elegans
Published on: May 5, 2023
4.0K
Cambios epigenéticos inducidos memorizados a través de generaciones en ratones
Saifeng Cheng1, Yoav Mayshar1, Yonatan Stelzer1
1Department of Molecular Cell Biology, Weizmann Institute of Science, 7610001 Rehovot, Israel.
Cell
|February 21, 2023
Resumen
La herencia epigenética transgeneracional se demuestra en ratones. Los investigadores indujeron cambios de metilación del ADN, que se transmitieron de forma estable a través de múltiples generaciones, afectando el metabolismo.
Área de la Ciencia:
- La epigenética
- Genética de los mamíferos
- Trastornos del metabolismo
Sus antecedentes:
- La herencia epigenética transgeneracional en los mamíferos sigue siendo controvertida.
- Comprender los mecanismos de las marcas epigenéticas heredadas es crucial.
Objetivo del estudio:
- Investigar la herencia estable de las modificaciones epigenéticas adquiridas.
- Examinar el impacto de estas modificaciones en los fenotipos metabólicos a través de las generaciones.
Principales métodos:
- Inducción de la metilación del ADN en las islas CpG (ICG) de genes relacionados con el metabolismo en ratones transgénicos.
- Monitoreo de la propagación de cambios epigenéticos y fenotipos metabólicos a lo largo de varias generaciones.
Principales resultados:
- Se indujo con éxito la metilación adquirida del ADN en los IGC asociados al promotor.
- Estas alteraciones epigenéticas y los fenotipos metabólicos asociados se heredaron de forma estable a través de múltiples generaciones en los ratones estudiados.
Conclusiones:
- El estudio proporciona evidencia de una herencia epigenética transgeneracional estable de los rasgos metabólicos adquiridos en los mamíferos.
- Esta investigación ofrece un modelo para estudiar los mecanismos y las implicaciones de la herencia epigenética.
Videos de Conceptos Relacionados
Genomic Imprinting and Inheritance
34.9K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
34.9K
Inheritance of Chromatin Structures
6.3K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.3K
Epigenetic Regulation
3.1K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.1K
Animal Mitochondrial Genetics
7.7K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
7.7K
In-vitro Mutagenesis
14.1K
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
14.1K

