Lipid Metabolism Effects on Male Fertility
Summary
Lipid metabolism plays a central role in male reproductive health by governing the synthesis of steroid hormones, the integrity of sperm membranes and the energetic demands of germ cells. Cholesterol is both a structural component of cell membranes and the indispensable precursor for testosterone and other androgens. Lipoprotein pathways deliver cholesterol to Leydig cells, while specialised transporters within Sertoli cells regulate testicular lipid homeostasis. Spermatozoa themselves are enriched in polyunsaturated fatty acids, which confer membrane fluidity essential for capacitation and acrosome reaction but also render them vulnerable to peroxidative damage. Dyslipidaemia and dietary lipid imbalance provoke systemic oxidative stress, disrupt mitochondrial function and alter signalling pathways such as p38 MAPK, undermining steroidogenesis and spermatogenesis. High-fat or cholesterol-rich diets have been shown to remodel the testicular proteome, impair the blood–testis barrier and provoke endoplasmic reticulum stress in Leydig cells. Conversely, lipid-lowering interventions—from pharmacological inhibition of HMGCR to dietary modulation of fatty acid profiles—can partially restore hormone levels and sperm function. Genetic studies have begun to unpick causal relationships between circulating lipid traits, lipid-modifying drug targets and infertility risk, revealing drug-target-specific effects that may be mediated in part by vitamin D. The interplay between systemic lipid regulation and local testicular lipid handling is influenced by lifestyle factors, metabolic disease and genetic background, making lipid metabolism a promising axis for diagnostics and intervention in male infertility.
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Lipid Metabolism Effects on Male Fertility publication trend
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Technical terms
Cholesterol: A steroidal lipid that stabilises cell membranes and serves as a precursor for androgen synthesis.
Lipoprotein: A protein–lipid complex that transports cholesterol and triglycerides through the circulatory system.
Dyslipidaemia: An abnormal elevation or imbalance of lipid levels in blood, often linked to metabolic disorders.
Spermatogenesis: The multi-stage process within seminiferous tubules by which spermatogonial stem cells develop into mature spermatozoa.
Leydig cells: Interstitial testicular cells responsible for the biosynthesis of testosterone in response to luteinising hormone.
Polyunsaturated fatty acids (PUFA): Fatty acids with multiple double bonds that contribute to membrane flexibility and are prone to oxidative modification.
References
- Effects of Dietary Cholesterol Regulation on Spermatogenesis of Gobiocypris rarus Rare Minnow. International Journal of Molecular Sciences (2023).
- Lipids, lipid-modified drug target genes, and the risk of male infertility: a Mendelian randomization study. Frontiers in Endocrinology (2024).
- Cholesterol: A Gatekeeper of Male Fertility?. Frontiers in Endocrinology (2018).
- Dietary Cholesterol and Lipid Overload: Impact on Male Fertility. Oxidative Medicine and Cellular Longevity (2019).
- Oxidized-LDL inhibits testosterone biosynthesis by affecting mitochondrial function and the p38 MAPK/COX-2 signaling pathway in Leydig cells. Cell Death & Disease (2020).
- HC diet inhibited testosterone synthesis by activating endoplasmic reticulum stress in testicular Leydig cells. Journal of Cellular and Molecular Medicine (2019).
- The ATP-binding cassette transporter 1 mediates lipid efflux from Sertoli cells and influences male fertility. Journal of Lipid Research (2004).
- Influence of a Virgin Olive Oil versus Butter Plus Cholesterol-Enriched Diet on Testicular Enzymatic Activities in Adult Male Rats. International Journal of Molecular Sciences (2017).
- High fat diet causes distinct aberrations in the testicular proteome. International Journal of Obesity (2020).
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