scholarly journals Generation of Human Induced Pluripotent Stem Cell-Derived Bona Fide Neural Stem Cells for Ex Vivo Gene Therapy of Metachromatic Leukodystrophy

2016 ◽  
Vol 6 (2) ◽  
pp. 352-368 ◽  
Author(s):  
Vasco Meneghini ◽  
Giacomo Frati ◽  
Davide Sala ◽  
Silvia De Cicco ◽  
Marco Luciani ◽  
...  
2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yumei Luo ◽  
Xuehu Xu ◽  
Xiuli An ◽  
Xiaofang Sun ◽  
Shu Wang ◽  
...  

The human induced pluripotent stem cell (hiPSC) provides a breakthrough approach that helps overcoming ethical and allergenic challenges posed in application of neural stem cells (NSCs) in targeted cancer gene therapy. However, the tumor-tropic capacity of hiPSC-derived NSCs (hiPS-NSCs) still has much room to improve. Here we attempted to promote the tumor tropism of hiPS-NSCs by manipulating the activity of endogenous miR-199a/214 cluster that is involved in regulation of hypoxia-stimulated cell migration. We first developed a baculovirus-delivered CRISPR interference (CRISPRi) system that sterically blocked the E-box element in the promoter of the miR-199a/214 cluster with an RNA-guided catalytically dead Cas9 (dCas9). We then applied this CRISPRi system to hiPS-NSCs and successfully suppressed the expression of miR-199a-5p, miR-199a-3p, and miR-214 in the microRNA gene cluster. Meanwhile, the expression levels of their targets related to regulation of hypoxia-stimulated cell migration, such as HIF1A, MET, and MAPK1, were upregulated. Further migration assays demonstrated that the targeted inhibition of the miR-199a/214 cluster significantly enhanced the tumor tropism of hiPS-NSCs both in vitro and in vivo. These findings suggest a novel application of CRISPRi in NSC-based tumor-targeted gene therapy.


2010 ◽  
Vol 14 (03) ◽  
pp. 17-33

Artificial Cells Containing Stem Cells for Liver Failure. Stem Cells and Regenerative Medicine. Towards a Universal Platform for Autologous Stem Cell Gene Therapy: the Induced Pluripotent Stem Cell Breakthrough.


2019 ◽  
Vol 16 (9) ◽  
pp. 4088-4088
Author(s):  
Esther Xingwei Lee ◽  
Dang Hoang Lam ◽  
Chunxiao Wu ◽  
Jing Yang ◽  
Chee Kian Tham ◽  
...  

2011 ◽  
Vol 8 (5) ◽  
pp. 1515-1524 ◽  
Author(s):  
Esther Xingwei Lee ◽  
Dang Hoang Lam ◽  
Chunxiao Wu ◽  
Jing Yang ◽  
Chee Kian Tham ◽  
...  

Biomedicines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 440
Author(s):  
Sally Esmail ◽  
Wayne R. Danter

Metachromatic leukodystrophy (MLD) is a rare neurodegenerative disease that results from a deficiency of the lysosomal enzyme arylsulfatase A (ARSA). Worldwide, there are between one in 40,000 and one in 160,000 people living with the disease. While there are currently no effective treatments for MLD, induced pluripotent stem cell-derived brain organoids have the potential to provide a better understanding of MLD pathogenesis. However, developing brain organoid models is expensive, time consuming and may not accurately reflect disease progression. Using accurate and inexpensive computer simulations of human brain organoids could overcome the current limitations. Artificially induced whole-brain organoids (aiWBO) have the potential to greatly expand our ability to model MLD and guide future wet lab research. In this study, we have upgraded and validated our artificially induced whole-brain organoid platform (NEUBOrg) using our previously validated machine learning platform, DeepNEU (v6.2). Using this upgraded NEUBorg, we have generated aiWBO simulations of MLD and provided a novel approach to evaluate factors associated with MLD pathogenesis, disease progression and new potential therapeutic options.


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