Fatty Acid Composition and Sperm Quality in Reproductive Biology
Summary
The fatty acid profile of spermatozoa is a critical determinant of male fertility, influencing membrane fluidity, resilience to oxidative stress and the capacity to undergo key fertilisation events. Sperm plasma membranes are enriched in a balance of saturated, monounsaturated and polyunsaturated fatty acids (PUFAs), each contributing to membrane dynamics that underlie motility, capacitation and the acrosome reaction. Dietary intake and endogenous metabolism shape this profile through elongation and desaturation pathways that yield essential long-chain PUFAs, such as docosahexaenoic acid (DHA) and arachidonic acid (AA). Oxidative damage to PUFA-rich membranes can impair motility and DNA integrity, while controlled modulation of membrane composition offers routes to enhance cryopreservation success and to develop biomarkers for male fertility. Advances in lipidomics, biophysical membrane analysis and molecular studies of lipid-processing enzymes have begun to unravel the interplay between lipid composition, sperm function and reproductive outcomes across species—from livestock to human clinical cohorts—highlighting both global significance and practical applications in assisted reproduction and animal breeding.
Research from Nature Portfolio
Recent investigations have characterised the fatty acid content and biophysical properties of the domestic cat sperm membrane, revealing an unusually low PUFA fraction and a predominance of saturated lipids. Measurements of membrane anisotropy and lipid order at physiological and sub-ambient temperatures indicated that lower fluidity in fresh cells correlates with improved post-thaw viability and motility. Cryopreservation was shown to alter both hydrophobic and hydrophilic membrane regions, with increased fluidity and lipid packing defects after thawing. These findings underscore the value of membrane biophysical parameters as predictors of cryoresistance and suggest that modulation of fatty acid composition may optimise semen storage protocols.
Fatty Acid Composition and Sperm Quality in Reproductive Biology publication trend
The graph below shows the total number of articles in fatty acid composition and sperm quality in reproductive biology across all publications each year (not limited to Nature Index journals).
Technical terms
Polyunsaturated fatty acids (PUFAs): Fatty acids with two or more double bonds, important for membrane fluidity and signalling.
Membrane fluidity: The viscosity of the lipid bilayer that affects membrane protein function and cell flexibility.
Capacitation: A maturation process that sperm undergo in the female tract, enabling the acrosome reaction.
Acrosome reaction: Release of enzymes from the sperm head that allows penetration of the oocyte's protective layers.
Cryopreservation: Low-temperature storage of cells or tissues, often involving controlled freezing and thawing.
Lipid peroxidation: Oxidative degradation of lipids leading to membrane damage and impaired cell function.
References
- Arachidonic Acid Pathways and Male Fertility: A Systematic Review. International Journal of Molecular Sciences (2023).
- PUFAs and Their Derivatives as Emerging Players in Diagnostics and Treatment of Male Fertility Disorders. Pharmaceuticals (2023).
- Ether lipids and a peroxisomal riddle in sperm. Frontiers in Cell and Developmental Biology (2023).
- Fatty acid composition and biophysical characteristics of the cell membrane of feline spermatozoa. Scientific Reports (2024).
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