Acrosome reacted spermatozoa were selected with immunobeads coated with an antibody directed against the inner acrosomal membrane (GB24) and then detached immunologically using an anti-Fab'2 antibody. Using this method, we have shown that acrosome reaction occurs in the most morphologically normal spermatozoa and is followed by a loss in motility and a decrease in longevity. Moreover, when injected in the perivitelline space of hamster oocytes, the selected spermatozoa had a higher fertilization rate than unselected spermatozoa, confirming that acrosome reaction is necessary for the fusion with the oocyte plasma membrane and that the selection method does not alter the fertilizing ability of the spermatozoa. Therefore, this method represents a new way for understanding the sperm functions.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Extracellular vesicles in seminal plasma of Sahiwal cattle bulls carry a differential abundance of sperm fertility-associated proteins for augmenting the functional quality of low-fertile bull spermatozoa.
Sci Rep
January 2025
Animal Genomics Laboratory, Animal Biotechnology Division, ICAR-National Dairy Research Institute, Karnal, Haryana, India.
Poor male fertility significantly affects dairy production, primarily due to low conception rates (CR) in bulls, even when cows are inseminated with morphologically normal sperm. Seminal plasma is a key factor in evaluating the fertilizing ability of bull semen. The extracellular vesicles (EVs) in seminal plasma contain fertility-associated proteins like SPAM1, ADAM7, and SP10, which influence sperm function and fertilizing potential.
View Article and Find Full Text PDFA simple and rapid evaluation of boar sperm quality using the resazurin colorimetric assay.
Anim Reprod
January 2025
Genetics and Physiology Division, Taiwan Livestock Research Institute, Ministry of Agriculture, Tainan, Taiwan.
Ensuring boar sperm quality before insemination is crucial for maximizing field fertility and efficient pig production. The computer-assisted sperm analysis (CASA) and fluorescence probes combined with flow cytometry (FC) are commonly used techniques for evaluating sperm kinematics and functions, closely related to animal fertility. However, their high cost and complex operations make it challenging to apply them in laboratories or pig breeding farms with limited resources.
View Article and Find Full Text PDFInfluences of 5-hydroxytriptamine on sperm hyperactivation and in vitro fertility in rats.
J Reprod Dev
January 2025
Research Laboratory of Laboratory Animals, Research Center for Laboratory Animals, Comprehensive Research Facilities for Advanced Medical Science, School of Medicine, Dokkyo Medical University, Tochigi 321-0293, Japan.
The neurotransmitter, 5-hydroxytriptamine (5-HT), is well known. Furthermore, it enhances the acrosome reaction, hyperactivation, and in vitro fertilization (IVF) success in hamsters and mice. In the present study, we examined whether 5-HT enhances hyperactivation and increases IVF success in rats.
View Article and Find Full Text PDFHeterogeneity in Fluorescence-Stained Sperm Membrane Patterns and Their Dynamic Changes Towards Fertilization in Mice.
Front Biosci (Landmark Ed)
January 2025
Graduate School of Life and Environmental Sciences, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, 400-8510 Kofu, Japan.
Background: Sperm represent a heterogeneous population crucial for male reproductive success. Additionally, sperm undergo dynamic changes during maturation and capacitation. Despite these well-established processes, the complex nature of sperm heterogeneity and membrane dynamics remains elusive.
View Article and Find Full Text PDFSystematic Review of the Impact of Calcium Channel Blockers on Sperm Function.
Reprod Toxicol
January 2025
Department of Urology, University of Florida, Gainesville, FL 32610, USA.
This study explores the effects of calcium channel blockers (CCBs) on sperm function, a critical aspect of male fertility. Male infertility, responsible for 30-50% of infertility cases, often involves issues with sperm motility and capacitation, both of which are heavily influenced by calcium ions and specific ion channels like CatSper and voltage-dependent calcium channels (VDCCs). CCBs, which are commonly prescribed for cardiovascular conditions, inhibit these calcium channels, potentially disrupting sperm function.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!