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Additional file 1 of Polystyrene microplastics impair sheep spermatogenesis by disrupting rumen microbiota-derived butyrate signaling
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Scientists found that microplastics eaten by sheep disrupt helpful gut bacteria that normally produce a beneficial compound called butyrate, and this disruption damaged sperm production, effects that didn't fully go away even after the microplastic exposure stopped. Adding butyrate back helped repair some of the testicular damage, suggesting gut health may play a surprising role in protecting fertility from environmental toxins. While this study was done in sheep, it raises real concerns given how widespread microplastic contamination is in human food and water supplies.
Additional file 1: Supplementary Methods 1.1. Dose Rationale. Supplementary Methods 1.2. Endotoxin detection of PS-MPs. Supplementary Methods 1.3. Untargeted metabolomics. Supplementary Methods 1.4. Single cell RNA-Sequencing and Analyses. Supplementary Methods 1.5. Py-GC/MS. Supplementary Methods 1.6. Metagenomics. Fig. S1. Characterization of PS-MPs. Fig. S2. Marker gene expression and validation of spermatogenic subpopulations in sheep testes. Fig. S3. Py-GC/MS chromatograms. Fig. S4. The effects of PS-MPs exposure on rumen microbial diversity and function. Fig. S5. Systemic hormonal, inflammatory, and antioxidant disturbances failed to recover after cessation of exposure. Fig. S6. PS-MPs–induced testicular histopathological damage, inflammation, and apoptosis failed to recover naturally. Fig. S7. Ruminal butyrate depletion and epithelial tissue damage persisted after natural recovery. Fig. S8. NaB supplementation significantly restored testicular morphology and suppressed inflammation and apoptosis following PS-MPs exposure. Fig. S9. Histological and seminal examinations of cauda epididymis. Fig. S10. Quantification of Nrf2 pathway and apoptosis-related proteins in testicular tissue. Table S1. Mapping of reported ruminant feed microplastic contamination to approximate mass-based estimates and experimental PS-MPs doses. Table S2. Kit information. Table S3. Primary and secondary antibody information. Table S4. Py-GC/MS calibration curves of polymers. Table S5. Primer sequences. Table S6. Microplastics profiles in testicular samples. Table S7. Sample sequencing data quality control and assembly results. Table S8. Ruminal volatile fatty acid profiles and pH in sheep exposed to PS-MPs. Table S9. Natural recovery of ruminal volatile fatty acids and pH after cessation of PS-MPs exposure in sheep. Table S10. Changes in ruminal volatile fatty acids and pH in sheep supplemented with sodium butyrate after cessation of exposure
More Papers Like This
Additional file 1 of Polystyrene microplastics impair sheep spermatogenesis by disrupting rumen microbiota-derived butyrate signaling
AI summary Read the abstract
Scientists found that microplastics eaten by sheep disrupt gut bacteria that produce butyrate, a beneficial compound needed for healthy sperm production, and this damage didn't fully heal even after the microplastic exposure stopped. The good news: giving sheep extra butyrate supplements helped repair the testicular damage, hinting at a possible way to protect fertility. Since humans have similar gut bacteria and are exposed to microplastics through food and water, this research raises concerns about long-term reproductive health and suggests gut-health-based treatments might one day help.
Polystyrene microplastics impair sheep spermatogenesis by disrupting rumen microbiota-derived butyrate signaling
AI summary Read the abstract
Scientists found that microplastics fed to male sheep damaged their sperm production, but surprisingly, the plastic didn't directly reach the testicles. Instead, it disrupted gut bacteria that make butyrate, a beneficial compound, and this ripple effect traveled through the bloodstream to harm reproductive health; restoring butyrate levels helped reverse the damage. This suggests microplastics may harm the body indirectly by messing with our gut microbiome, raising questions about similar hidden effects in humans who consume these particles daily through food and water.
Additional file 2 of Polystyrene microplastics impair sheep spermatogenesis by disrupting rumen microbiota-derived butyrate signaling
AI summary Read the abstract
I'm not able to write a meaningful summary here because the provided content is just supplementary lab images (uncropped Western blots) used to verify data in the original study, not the actual research findings. To give you an accurate summary, I'd need the main paper describing the study on sheep, microplastics, gut bacteria, and reproductive health. If you can share that abstract or key findings, I'd be happy to summarize it in plain language, including what it might suggest about microplastics and human health.
Additional file 2 of Polystyrene microplastics impair sheep spermatogenesis by disrupting rumen microbiota-derived butyrate signaling
AI summary Read the abstract
I'm not able to write a meaningful summary here, because this file is just supplementary lab images (uncropped Western blots), the raw data behind another paper's experiments, not the actual research with methods and results. To give you an accurate summary of the science, I'd need the main paper it supports. Based on the title, that study likely found that microplastics disrupt gut bacteria in sheep in a way that harms sperm production, which could hint at similar risks for humans given our shared gut biology, but I'd want to see the full findings before summarizing specifics.
Probiotics improve polystyrene microplastics-induced male reproductive toxicity in mice by alleviating inflammatory response
AI summary Read the abstract
Researchers found that giving mice probiotics (beneficial bacteria including Lactobacillus and Bifidobacterium) helped protect against reproductive damage caused by polystyrene microplastics. The microplastics disrupted gut bacteria and triggered inflammation that traveled to the testes via the gut-testis connection, reducing sperm quality and testosterone levels. Probiotic treatment restored healthy gut bacteria and reduced the inflammatory response, suggesting that maintaining gut health could help counteract some reproductive harm from microplastic exposure.
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