Sheep liver organoids could cut animal use in nutrition research

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Researchers in Spain have reported what appears to be the first sheep hepatic organoid model, describing a 3D liver-like culture grown from ovine liver progenitor cells that preserved key structural features of liver tissue and responded to nutrient supplementation in ways relevant to metabolism research. In the new Frontiers in Veterinary Science paper, the organoids showed apical-basal polarity, tight junctions, albumin expression, glycogen accumulation, and measurable gene-expression changes after exposure to DL-methionine and betaine. The authors say the model could serve as an in vitro platform for studying nutrient-gene interactions and feed additive strategies in ruminants while reducing reliance on live experimental animals. (frontiersin.org)

Why it matters: For veterinary and animal nutrition researchers, the advance is less about replacing whole-animal work outright and more about adding a more species-relevant screening tool earlier in the pipeline. Organoids can offer better tissue architecture and longer-term reproducibility than conventional cell cultures, but liver organoids still tend to retain a progenitor-like state rather than fully mature hepatocyte function, which means they’re best viewed as a complementary model for hypothesis generation, feed additive screening, and mechanism work before in vivo validation. (frontiersin.org)

What to watch: The next step will be whether these ovine liver organoids can be standardized, differentiated further, and validated against in vivo outcomes for nutrition, toxicology, and drug-metabolism questions in ruminants. (frontiersin.org)