Related Experiment Video
Updated: Aug 28, 2025
09:40
A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model
Published on: February 6, 2018
15.2K
Development of the Connecting Piece in ODF1-Deficient Mouse Spermatids
1Johann-Friedrich-Blumenbach-Institute of Zoology and Anthropology-Developmental Biology, GZMB, Ernst-Caspari-Haus, Justus-von-Liebig-Weg 11, Georg-August-Universität Göttingen, 37077 Göttingen, Germany.
International Journal of Molecular Sciences
|September 23, 2022
Summary
Outer dense protein 1 (ODF1) is crucial for sperm head-tail linkage, preventing decapitation and ensuring male fertility. While ODF1 is dispensable for connecting piece development, its absence disrupts sperm integrity.
Area of Science:
- Reproductive Biology
- Spermatozoa Ultrastructure
- Male Infertility Research
Background:
- Outer dense protein 1 (ODF1) is a key component of mammalian sperm tail accessory fibers and the connecting piece.
- The connecting piece links the sperm head and tail, essential for progressive motility and fertilization.
- ODF1 depletion in mice causes male infertility due to sperm decapitation.
Purpose of the Study:
- To investigate the role of ODF1 in the development of the sperm connecting piece.
- To analyze the fine structure of the developing connecting piece in the absence of ODF1.
Main Methods:
- Homologous recombination in mice to deplete ODF1.
- Transmission electron microscopy to examine the fine structure of developing spermatids.
Main Results:
- The connecting piece develops normally in ODF1-deficient spermatids.
- No structural abnormalities were observed in the developing connecting piece without ODF1.
- ODF1-deficient spermatozoa exhibit decapitation, indicating a failure in head-tail linkage.
Conclusions:
- ODF1 is not essential for the structural development of the sperm connecting piece.
- ODF1 is critical for maintaining the integrity of the sperm head-tail linkage post-development.
- Disruption of ODF1 function leads to sperm decapitation and male infertility.
Related Concept Videos
01:41Spermatogenesis
103.0K
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...
103.0K
01:15Development of the Sexual Organs in the Embryo and Fetus
1.2K
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
1.2K
01:49Meiosis I
194.1K
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...
194.1K
02:02Meiosis II
46.1K
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,...
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,...
46.1K