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Videos de Conceptos Relacionados

Oogenesis01:22

Oogenesis

Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
Mouse Models of Cancer Study02:43

Mouse Models of Cancer Study

Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
Master Transcription Regulators02:23

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...

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Video Experimental Relacionado

Updated: May 23, 2026

Whole Ovary Immunofluorescence, Clearing, and Multiphoton Microscopy for Quantitative 3D Analysis of the Developing Ovarian Reserve in Mouse
12:36

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Published on: September 3, 2021

MARF1 regula los procesos oogénicos esenciales en ratones.

You-Qiang Su1, Koji Sugiura, Fengyun Sun

  • 1The Jackson Laboratory, Bar Harbor, ME 04609, USA.

Science (New York, N.Y.)
|March 24, 2012
PubMed
Resumen

La detención de la meiosis femenina 1 (MARF1) es crucial para la fertilidad femenina. Su ausencia causa infertilidad al interrumpir la maduración de los ovocitos, aumentar las retrotransposones y provocar daños en el ADN.

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Área de la Ciencia:

  • Biología de la reproducción Biología reproductiva.
  • Genética molecular genética molecular.
  • Desarrollo del desarrollo del ovocito.

Sus antecedentes:

  • Los ovocitos competentes para la fertilización requieren meiosis coordinada, maduración citoplasmática y estabilidad genómica.
  • El papel de la Meiosis Arrest Female 1 (MARF1) en la oogénesis de los mamíferos no se entiende completamente.

Objetivo del estudio:

  • Investigar la función de MARF1 en el desarrollo de ovocitos de mamíferos y la fertilidad femenina.
  • Para dilucidar los mecanismos moleculares subyacentes a la infertilidad causada por las mutaciones Marf1.

Principales métodos:

  • Análisis de ratones mutantes Marf1 para evaluar la fertilidad femenina.
  • Análisis transcriptómico para identificar genes expresados diferencialmente.
  • Evaluación de la expresión del retrotransposón y la integridad del ADN en los ovocitos.

Principales resultados:

  • Las mutaciones de Marf1 conducen a la infertilidad femenina con maduración defectuosa de los ovocitos y detención meiótica.
  • Los ovocitos mutantes exhiben una regulación al alza de transcripciones específicas, incluida la subunidad catalítica de la proteína fosfatasa 2 (PPP2CB).
  • Se observó una mayor expresión de retrotransposones (Iap, Line1) y elevadas rupturas de doble cadena de ADN en ovocitos mutantes Marf1.

Conclusiones:

  • MARF1 es esencial para regular la maduración de los ovocitos, la integridad genómica y la fertilidad femenina.
  • MARF1 funciona suprimiendo transcripciones específicas, incluida la PPP2CB, y controlando la actividad del retrotransposón.
  • La alteración de la función de MARF1 tiene implicaciones significativas para la salud reproductiva y el desarrollo de la descendencia.