ArticleJournal of advanced veterinary and animal research2024
The effect of toll-like receptor 7/8 ligand in inhibiting the motility of putative X-chromosome-bearing sperm in rams.
Article in Journal of advanced veterinary and animal research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed.
- Sperm Sexing in Selected Animals and Humans: Methods, Applications, and Future Prospects.Andrology · 2026Review
- Sex Determination of X and Y Separated Fresh Bull Sperm Using SRY Gene Copy Number Analysis.Veterinary medicine and science · 2026Article
- The effect of toll-like receptor 7/8 activation by ligand (R848) on morphometry, proportion of X-Y chromosome-bearing sperm, and sexed sperm quality of bucks.Open veterinary journal · 2026Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Objectives: This study aims to determine the effect of a toll-like receptor 7/8 (TLR7/8) ligand on the motility of putative X- and Y-chromosome-bearing sperm in rams. Materials and Methods: Sperm from three fertile rams were incubated with tris-citrate buffer containing 0 to 0.9 μM resiquimod (a TLR7/8 ligand) that affects only the X chromosome sperm. Sperm was then subjected to a swim-up test method. After incubation, sperm in the top and lower layers of the media were transferred into a separate new tube. Sperm motility characteristics, concentration, morphometry, and adenosine triphosphate (ATP) concentration from both layers were identified. The data were analyzed for multiple comparisons using one-way analysis of variance. Results: The study demonstrated that the presence of resiquimod used in the swim-up method facilitated the morphometric separation of smaller sperm, predominantly representing Y chromosome sperm in the top layer. Meanwhile, larger samples, indicating X chromosome sperm, accumulated in the lower layer of the media, thus increasing sperm concentration. Resiquimod also decreased motility in the lower layer, but samples in the top layer were unaffected. This decrease was reinforced by the depletion of the ATP level of sperm at the lower level. Conclusion: The TLR7/8 ligand reduced the motility of the putative X-sperm by decreasing their ATP content, allowing separation from the putative Y-sperm. These results suggested the importance of TLR7/8 as a potential biomarker in sperm selection technology.
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