Video Experimental Relacionado

Updated: Jul 16, 2026

A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model

A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model

Published on: February 6, 2018

Papel conservado de las nanoproteínas en el desarrollo de las células germinales

Masayuki Tsuda¹, Yumiko Sasaoka, Makoto Kiso

¹Division of Mammalian Development, National Institute of Genetics, SOKENDAI, Yata 1111, Mishima, Shizuoka 411-8540, Japan.

Science (New York, N.Y.)

|August 30, 2003

Resumen

Los genes nanos2 y nanos3 del ratón son cruciales para el desarrollo y la migración de las células germinales. Nanos2 es esencial para la espermatogonia, mientras que Nanos3 es vital para la migración de células germinales primordiales en ambos sexos.

Área de la Ciencia:

Biología del desarrollo Biología del desarrollo.
Genética La genética.
Biología de la reproducción Biología reproductiva.

Sus antecedentes:

Los Nanos suministrados por la madre regulan la migración de las células germinales en Drosophila.
Los genes cigóticos están implicados en el desarrollo de la célula germinal primordial del ratón (PGC).

Objetivo del estudio:

Para clonar y analizar funcionalmente los genes nanos2 y nanos3 del ratón.
Comprender las funciones de nanos2 y nanos3 en el desarrollo y la migración de células germinales de ratón.

Principales métodos:

Clonado genético y análisis funcional.
Estudios de expresión génica diferencial en PGCs de ratón.

Principales resultados:

Los ratones nanos2 y nanos3 exhiben una expresión diferencial en PGCs.
La eliminación de nanos2 conduce a una pérdida completa de la espermatogonia en los hombres.
La eliminación de nanos3 resulta en la pérdida completa de células germinales en ambos sexos.

Conclusiones:

Los ratones nanos2 y nanos3 desempeñan funciones distintas y esenciales en el desarrollo y la migración de las células germinales.
A pesar de las diferencias en los mecanismos de especificación de las células germinales, las Nanoproteínas muestran funciones conservadas en todas las especies.

Más Videos Relacionados

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

Published on: April 19, 2018

Functional Assessment of Kinesin-7 CENP-E in Spermatocytes Using In Vivo Inhibition, Immunofluorescence and Flow Cytometry

Functional Assessment of Kinesin-7 CENP-E in Spermatocytes Using In Vivo Inhibition, Immunofluorescence and Flow Cytometry

Published on: December 28, 2021

Videos de Conceptos Relacionados

Meiosis I

Meiosis I

Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by a...

Spermatogenesis

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

Nucleosome Remodeling

Nucleosome Remodeling

Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...

Meiosis I

Meiosis I

Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...

Meiosis II

Meiosis II

Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...

Spermatogenesis

Spermatogenesis

Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...