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Related Concept Videos

Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
Spermatogenesis01:41

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...
Spermatogenesis01:22

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...
Sperm Transport01:15

Sperm Transport

The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

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Related Experiment Video

Updated: May 7, 2026

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
08:48

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects

Published on: April 21, 2022

The combined human sperm proteome: cellular pathways and implications for basic and clinical science.

Alexandra Amaral1, Judit Castillo, João Ramalho-Santos

  • 1Human Genetics Research Group, IDIBAPS, Faculty of Medicine, University of Barcelona, Casanova 143, 08036 Barcelona, Spain.

Human Reproduction Update
|October 2, 2013
PubMed
Summary

Human sperm proteomic studies reveal 6198 proteins, challenging previous notions of sperm biology. Unexpected findings include proteins involved in RNA metabolism and pathways relevant to male fertility and infertility.

Keywords:
male fertilityproteomicssperm functionspermatozoa

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Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Related Experiment Videos

Last Updated: May 7, 2026

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
08:48

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects

Published on: April 21, 2022

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Area of Science:

  • Proteomics
  • Sperm Biology
  • Male Reproductive Health

Background:

  • Human sperm is ideal for proteomic analysis due to accessibility and purification ease.
  • Advanced proteomic techniques are revolutionizing the understanding of sperm biology.
  • Previous assumptions of sperm cells being transcriptionally and translationally silent are being challenged.

Purpose of the Study:

  • To review human sperm proteomic studies.
  • To compile a comprehensive list of identified sperm proteins.
  • To re-evaluate the functional significance of these proteins.

Main Methods:

  • A systematic literature search of PubMed/Medline databases up to December 31, 2012, was performed.
  • Human sperm proteomic studies were identified and analyzed.
  • Bioinformatics tools, including the Reactome pathway knowledgebase, were used for protein analysis.

Main Results:

  • 30 studies identified 6198 distinct human sperm proteins.
  • Approximately 30% of identified proteins are known to be expressed in the testis.
  • Proteins involved in metabolism, apoptosis, cell cycle, meiosis, membrane trafficking, RNA metabolism, and translational regulation were found.
  • Presence of proteins in organelles like cytoplasmic ribosomes and peroxisomes, previously thought absent, was noted.
  • Alterations in certain protein levels correlate with low-quality sperm, suggesting clinical relevance.

Conclusions:

  • The most comprehensive human sperm proteome analysis reveals previously overlooked cellular pathways.
  • Further research confirming the activity and biological significance of these pathways is crucial.
  • Understanding these pathways will significantly advance knowledge of human sperm function, male fertility, and infertility.