Stem cell research最新文献

BAG3 plays a key role in proteostasis as a central component of the chaperone-assisted selective autophagy (CASA) complex. A point mutation (p.P209L; c.626C>T) in the BAG3 gene causes severe myofibrillar myopathy-6 (MFM6), restrictive cardiomyopathy and polyneuropathy leading to muscle weakness and heart failure. Establishing suitable controls for patient-derived BAG3^P209L/WT-induced pluripotent stem cells (iPSCs), two isogenic controls were generated by correcting the point mutation c.626C>T in iPSCs from two MFM6-patients. We performed quality control of these lines by differentiation into the three germ layers and pluripotency tests. These isogenic hiPSC-control lines allow the correct analysis of MFM6 using corresponding patient-specific iPSCs.

Systemic sclerosis (SSc) is a rare and complex connective tissue disease associated with high morbidity and mortality. SSc is characterized by ischemic vasculopathy, cutaneous and visceral fibrosis and a dysimmune state (Denton and Khanna, 2017; Volkmann et al., 2023; Barnes and Mayes, 2012). We have derived induced pluripotent stem cell (iPSC) lines from two SSc patients aged 38 and 67 years with severe vascular phenotype. These iPSC lines expressed pluripotent markers, exhibited normal and stable genome, and differentiated into trilineage embryonic layers in teratoma formation assays. These SSc-specific iPSC lines can be differentiated into endothelial cells, providing a valuable model to elucidate vascular dysfunction and develop personalized therapeutic approaches.

A rare neurodevelopmental disorder has been linked to a well-conserved splice site variant in the TRAPPC4 gene (c.454 + 3A > G), which causes mis-splicing of TRAPPC4 transcripts and reduced levels of TRAPPC4 protein. Patients present with severe progressive neurological symptoms including seizures, microcephaly, intellectual disability and facial dysmorphism. We have generated stem cells from fibroblasts of two individuals with the same homozygous TRAPPC4 c.454 + 3A > G pathogenic variant and used CRISPR/Cas9 editing to generate heterozygous gene-corrected isogenic controls. Clones were tested for pluripotency, differentiation potential, genotyped and karyotyped. These iPSC-based models will be used to understand disease mechanisms of TRAPPC4 disorder.

Retinitis Pigmentosa type 25 (RP25) is a form of inherited retinal dystrophy characterized by a progressive loss of rod photoreceptors, subsequent degeneration of cone photoreceptors, and eventually, the retinal pigment epithelium. Caused by mutations in the EYS gene, it is believed to be critical for the structural and functional integrity of the retina. Using a non-integrative RNA reprogramming method, we have generated human induced pluripotent stem cell (hiPSC) lines from RP25 patient and from carriers but asymptomatic daughters. These three hiPSC lines maintain a normal karyotype, exhibit pluripotency gene expression, and can differentiate into the three germ layers.

Fabry disease (FD) is a systemic disease in which globotriaosylceramide and other naturally occurring glycosphingolipid accumulate in various tissues throughout the body due to mutation of α-galactosidase A (GLA). These induced pluripotent stem cells (iPSCs) were generated from a 10-year-old male patient's urine carrying the GLA c.1080_1082del Fabry disease mutation. The iPSCs were validated by confirming the pluripotent markers expression, trilineage differentiation capability, normal karyotype and targeted mutation. This resource enables further assessment of the pathophysiological development of Fabry disease and serves as a model to develop drugs for treating Fabry disease.

A human induced pluripotent stem cell (hiPSC) line (UCLi025-A) was generated from dermal fibroblast cells from a 42-year-old female donor with polyneuropathy, hearing loss, retinitis pigmentosa and early-onset cataract (PHARC) syndrome carrying a homozygous nonsense variant in ABHD12 c.193C>T, p.(Arg65*). Fibroblasts were confirmed to carry the variant by Sanger sequencing and subsequently reprogrammed using non-integrating episomal plasmids generating a hiPSC line (UCLi025-A). This established cell line was validated for pluripotency markers expression, in vitro differentiation potential and normal karyotype. The utilization of this cell line will serve as a valuable resource for modelling PHARC syndrome and identification of therapeutic targets.

Prostate cancer (PCa) is the most common malignant tumor of the male reproductive system. In this study, we establish an induced pluripotent stem cell (iPSC) line from a male diagnosed with PC. of This iPSCs line was generated from the peripheral blood mononuclear cells (PBMCs) using a non-integrated Sendai virus. It shows a normal karyotype, and has abilities of expressing pluripotent markers and differentiating into three germ layers.

Prostate cancer (PCa) is the most common malignant tumor of the male reproductive system. In this study, we generated an induced pluripotent stem cell (iPSC) line from the peripheral blood mononuclear cells (PBMCs) of a 67-year-old male patient and diagnosed with PC. The established iPSCs were confirmed by flow cytometry and immunofluorescence. Furthermore, the iPSC line has a normal chromosomal karyotype and has the potential of spontaneous differentiation into three germ layers in vitro. The iPSC line will be a useful tool for investigating the pathogenesis mechanisms of PCa.

Cystic Fibrosis (CF) is a life-shortening disease that is caused by mutations in the CFTR gene, a gene that is expressed in multiple organs. There are several primary tissue models of CF disease, including nasal epithelial cultures and rectal organoids, that are effective in reporting the potential efficacy of mutation-targeted therapies called CFTR modulators. However, there is the well-documented variation in tissue dependent, therapeutic response amongst CF patients, even those with the same CF-causing mutation. Hence, there is an interest in developing strategies for comparing therapeutic efficacy in different organs relative to isogenic controls. In this study, we evaluated the CFTR chloride channel response to the highly effective CFTR modulator: Trikafta, in CF patient specific, iPSC-derived colonic and airway cultures relative to mutation-corrected (non-CF) tissues from that same individual. We measured pharmacological rescue in both tissues. This proof-of-concept study provides a roadmap for future comparisons of patient-specific CF therapeutic responses in both pulmonary and extra-pulmonary systems.

Using the integration-free episomal vector containing the reprogramming components OCT3/4/shp53, Sox2/KLF4, L-MYC/LIN28, and EBNA-1, hematopoietic stem cells obtained from a healthy 33-year-old man were effectively reprogrammed and turned into induced pluripotent stem cells (iPSCs). The reprogrammed iPSCs were grown without the use of feeders. They exhibited a normal karyotype, displayed pluripotency markers, and differentiated into cells from the three germ layers. This DMSCi002-A line may serve as a control for investigating disease mechanisms.