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PWS represents an atypical form of obesity-associated metabolic disease in which extreme adiposity coexists with a comparatively attenuated risk of insulin resistance and hepatic complications. The genetic basis of PWS leads to impaired lipid storage and oxidation capacity in adipocytes, with downstream consequences for hepatic lipid burden. Systemic lipidomic and metabolomic profiling further supports the existence of a distinct metabolic signature in PWS, showing consistent qualitative alterations in circulating phospholipids that may, in turn, influence hepatic lipid export and the risk of steatosis. Hepatic involvement in PWS seems to be shaped by intrinsic alterations in lipid handling and endocrine signaling rather than by adiposity. Finally, metabolic dysfunction-associated steatotic liver disease (MASLD) remains less prevalent in PWS. Among the currently available models derived from induced pluripotent stem cells (iPSCs), hepatocyte-like cells (HLCs) and iPSC-derived organoids, have emerged as valuable tools for investigating rare genetic liver disorders and as powerful strategies to dissect tissue-specific mechanisms underlying PWS phenotype, because they bridge the gap between molecular epigenetic mechanisms and organism-level metabolic phenotypes in PWS. Their ability to capture patient-specific epigenetic regulation and tissue-specific metabolic dysfunction positions them as indispensable tools for advancing both mechanistic understanding and therapeutic development in PWS.<\/jats:p>","DOI":"10.3389\/fendo.2026.1794669","type":"journal-article","created":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T04:43:21Z","timestamp":1782276201000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Innovative models to explore hepatic involvement in Prader-Willi syndrome"],"prefix":"10.3389","volume":"17","author":[{"given":"Romar Guintu","family":"Dabban","sequence":"first","affiliation":[{"name":"Fondazione Italiana Fegato (Italian Liver Foundation), Innovative Models Unit","place":["Trieste, Italy"]},{"name":"Department of Life Sciences, University of Trieste","place":["Trieste, Italy"]},{"name":"Philippine Council for Health Research and Development, Department of Science and Technology","place":["Taguig, Metro Manila, Philippines"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graziano","family":"Grugni","sequence":"additional","affiliation":[{"name":"Istituto Auxologico Italiano, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Experimental Laboratory for Auxo-Endocrinological Research","place":["Piancavallo-Verbani, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adele","family":"Bondesan","sequence":"additional","affiliation":[{"name":"Istituto Auxologico Italiano, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Experimental Laboratory for Auxo-Endocrinological Research","place":["Piancavallo-Verbani, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Benedetta","family":"Blarasin","sequence":"additional","affiliation":[{"name":"Fondazione Italiana Fegato (Italian Liver Foundation), Innovative Models Unit","place":["Trieste, Italy"]},{"name":"Department of Life Sciences, University of Trieste","place":["Trieste, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudio","family":"Tiribelli","sequence":"additional","affiliation":[{"name":"Fondazione Italiana Fegato (Italian Liver Foundation), Innovative Models Unit","place":["Trieste, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cristina","family":"Bellarosa","sequence":"additional","affiliation":[{"name":"Fondazione Italiana Fegato (Italian Liver Foundation), Innovative Models Unit","place":["Trieste, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alessandro","family":"Sartorio","sequence":"additional","affiliation":[{"name":"Istituto Auxologico Italiano, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Experimental Laboratory for Auxo-Endocrinological Research","place":["Piancavallo-Verbani, Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,6,24]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"10","DOI":"10.1038\/gim.0b013e31822bead0","article-title":"Prader-willi syndrome","volume":"14","author":"Cassidy","year":"2012","journal-title":"Genet Med"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1186\/s13023-017-0673-6","article-title":"Early diagnosis and care is achieved but should be improved in infants with Prader-Willi syndrome","volume":"12","author":"Bar","year":"2017","journal-title":"Orphanet. 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