Stem cell research最新文献

GM1 gangliosidosis (GM1) is a rare autosomal recessive neurogenerative lysosomal storage disease characterized by deficiency of beta-galactosidase (β-gal) and intralysosomal accumulation of GM1 ganglioside and other glycoconjugates. Resources for GM1 disease modelling are limited, and access to relevant cell lines from human patients is not possible. Generation of iPSC lines from GM1 patient-derived dermal fibroblasts allows for disease modelling and therapeutic testing in 2D and 3D cell culture models relevant to CNS disorders, including various neuronal subtypes and cerebral organoids. The iPSC line described here will be critical to therapeutic development and set the foundation for translational gene therapy work.

Human-derived experimental systems such as induced pluripotent stem cell (iPSC)-derived models are useful tools to study mechanisms and potential therapeutic approaches for mitochondrial disorders. Here, we generated two iPSC lines from fibroblasts of patients carrying mutations at MT-ATP6 (m.8993 T>G). One patient with 96 % heteroplasmy suffered from Neuropathy, Ataxia, and Retinitis pigmentosa (NARP) syndrome, while the other patient with a homoplasmic mutation suffered from Maternally Inherited Leigh Syndrome (MILS). For reprogramming, we delivered reprogramming factors using Sendai virus and evaluated the pluripotency characteristics of the derived iPSCs. The degree of heteroplasmy remained stable after reprogramming.

Smith-Magenis syndrome (SMS) is a complex neurodevelopmental disorder with a birth incidence of 1:25,000. SMS is caused by haploinsufficiency of the retinoic acid-induced retinoic acid1 (RAI1) gene, determined by an interstitial deletion of ∼ 3.7 Mb (17p11.2, including the RAI1 gene) in 90 % of cases and a mutation on the RAI1 gene in only 10 % of cases. We generated and characterized a human pluripotent stem cell line (hIPSCs) derived from primary fibroblasts of a 17-year-old woman carrying a 17p11.2 deletion including the RAI1 gene.

As a neurodevelopmental multifactorial disorder whose prevalence has been increasing worldwide, attention-deficit hyperactivity disorder (ADHD) is considered a public health concern. Methylphenidate (MPH) is the drug of choice for ADHD; however, not all patients respond fully to this treatment. Therefore, exploring the underlying molecular mechanisms involved in ADHD and potential novel therapeutic targets is crucial. Here, we generated induced pluripotent stem cells (iPSCs) from Peripheral Blood Mononuclear Cells (PBMCs) retrieved from four ADHD patients (two MPH responders and two non-responders) using Sendai virus. These lines might be helpful for the in vitro investigation of ADHD pathophysiology in a patient-specific manner.

X-linked retinoschisis (XLRS) is a common retinal genetic disease that occurs in juvenile males and causes progressive visual impairment. This presents a schisis in the macula or peripheral retina of bilateral eyes, which has no effective treatment. Here, we introduced the RS1 (c.C304T, p.R102W) mutation into a normal induced pluripotent stem (iPS) cell line using CRISPR/Cas9 technology. This missense mutation was consistent with that observed in the XLRS patient-derived iPS cell line (CSUASOi001-A). Conclusively, establishing a directed gene mutation cell line (CSUi007-A) provides a useful cell resource to investigate XLRS pathogenesis.

GM1 gangliosidosis is an autosomal recessive lysosomal storage disorder caused by defects in the beta-galactosidase (GLB1) gene, which results in accumulation of GM1 gangliosides and related glycoconjugates in the lysosomes leading to lysosomal swelling, cellular damage, and organ dysfunction. We generated SDQLCHi080-A cell line from a patient with GM1 gangliosidosis carrying mutations of c.523C > T and c.574T > C > T in the GLB1 gene. The cell line exhibited typical iPSC morphology, expressed high levels of stemness markers, exhibited normal karyotype, and has the capability to differentiate into three germ layers. This cell line could provide a useful GM1 gangliosidosis model in vitro for further study.

Current methodologies for hepatocyte induction from human induced pluripotent stem cells (hiPSCs) have limited efficacy due to lack of a functional hepatocyte reporter. To address this, we developed an endogenous albumin (ALB)-sfGFP reporter system in hiPSCs using homologous directed recombination (HDR)-mediated knock-in. The hiPSCs maintained the characteristic morphology, pluripotency, and normal karyotype while demonstrating successful differentiation into all three germ layers both in vitro and in vivo. Co-expression of EGFP and ALB was observed in the derived hepatocyte-like cells (HLCs). This reporter system holds promise for functional hepatocyte induction.