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Derivation of healthy hepatocyte-like cells from a female patient with ornithine transcarbamylase deficiency through X-inactivation selection
oleh: Ramon Santamaria, Maria Ballester, Guillem Garcia-Llorens, Francisco Martinez, Marina Blazquez, Carmen Ribes-Koninckx, Jose V. Castell, Torsten Wuestefeld, Roque Bort
Format: | Article |
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Diterbitkan: | Nature Portfolio 2022-02-01 |
Deskripsi
Abstract Autologous cell replacement therapy for inherited metabolic disorders requires the correction of the underlying genetic mutation in patient’s cells. An unexplored alternative for females affected from X-linked diseases is the clonal selection of cells randomly silencing the X-chromosome containing the mutant allele, without in vivo or ex vivo genome editing. In this report, we have isolated dermal fibroblasts from a female patient affected of ornithine transcarbamylase deficiency and obtained clones based on inactivation status of either maternally or paternally inherited X chromosome, followed by differentiation to hepatocytes. Hepatocyte-like cells derived from these clones display indistinct features characteristic of hepatocytes, but express either the mutant or wild type OTC allele depending on X-inactivation pattern. When clonally derived hepatocyte-like cells were transplanted into FRG® KO mice, they were able to colonize the liver and recapitulate OTC-dependent phenotype conditioned by X-chromosome inactivation pattern. This approach opens new strategies for cell therapy of X-linked metabolic diseases and experimental in vitro models for drug development for such diseases.