In Vitro Expansion of Single Lgr5+ Liver Stem Cells Induced by Wnt-driven Regeneration
Authors
Affiliations
The Wnt target gene Lgr5 (leucine-rich-repeat-containing G-protein-coupled receptor 5) marks actively dividing stem cells in Wnt-driven, self-renewing tissues such as small intestine and colon, stomach and hair follicles. A three-dimensional culture system allows long-term clonal expansion of single Lgr5(+) stem cells into transplantable organoids (budding cysts) that retain many characteristics of the original epithelial architecture. A crucial component of the culture medium is the Wnt agonist RSPO1, the recently discovered ligand of LGR5. Here we show that Lgr5-lacZ is not expressed in healthy adult liver, however, small Lgr5-LacZ(+) cells appear near bile ducts upon damage, coinciding with robust activation of Wnt signalling. As shown by mouse lineage tracing using a new Lgr5-IRES-creERT2 knock-in allele, damage-induced Lgr5(+) cells generate hepatocytes and bile ducts in vivo. Single Lgr5(+) cells from damaged mouse liver can be clonally expanded as organoids in Rspo1-based culture medium over several months. Such clonal organoids can be induced to differentiate in vitro and to generate functional hepatocytes upon transplantation into Fah(-/-) mice. These findings indicate that previous observations concerning Lgr5(+) stem cells in actively self-renewing tissues can also be extended to damage-induced stem cells in a tissue with a low rate of spontaneous proliferation.
Global landscape of hepatic organoid research: A bibliometric and visual study.
Li T, Bo R, Yan J, Johnson N, Liao M, Li Y World J Hepatol. 2025; 17(2):95624.
PMID: 40027550 PMC: 11866153. DOI: 10.4254/wjh.v17.i2.95624.
Hepatobiliary organoid research: the progress and applications.
Zou R, Dai Y, Liu F, Yang S, Hu H, Li F Front Pharmacol. 2025; 16:1473863.
PMID: 40008122 PMC: 11850396. DOI: 10.3389/fphar.2025.1473863.
Dietary cysteine enhances intestinal stemness via CD8 T cell-derived IL-22.
Chi F, Zhang Q, Shay J, Hoeve J, Yuan Y, Yang Z bioRxiv. 2025; .
PMID: 39990373 PMC: 11844450. DOI: 10.1101/2025.02.15.638423.
Gong D, Mo J, Zhai M, Zhou F, Wang G, Ma S Front Med (Lausanne). 2025; 11:1521851.
PMID: 39927267 PMC: 11804114. DOI: 10.3389/fmed.2024.1521851.
Standard Protocols for Characterising Primary and In Vitro-Generated Human Hepatocytes.
Heydari Z, Gramignoli R, Piryaei A, Zahmatkesh E, Pooyan P, Seydi H J Cell Mol Med. 2025; 29(3):e70390.
PMID: 39910642 PMC: 11798750. DOI: 10.1111/jcmm.70390.