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1.
Sci Rep ; 12(1): 15869, 2022 09 23.
Article in English | MEDLINE | ID: mdl-36151116

ABSTRACT

Induced pluripotent stem cells (iPSCs) are a valuable resource for neurological disease-modeling and drug discovery due to their ability to differentiate into neurons reflecting the genetics of the patient from which they are derived. iPSC-derived cultures, however, are highly variable due to heterogeneity in culture conditions. We investigated the effect of passage number on iPSC differentiation to optimize the generation of sensory neurons (iPSC-dSNs). Three iPSC lines reprogrammed from the peripheral blood of three donors were differentiated into iPSC-dSNs at passage numbers within each of the following ranges: low (5-10), intermediate (20-26), and high (30-38). Morphology and pluripotency of the parent iPSCs were assessed prior to differentiation. iPSC-dSNs were evaluated based on electrophysiological properties and expression of key neuronal markers. All iPSC lines displayed similar morphology and were similarly pluripotent across passage numbers. However, the expression levels of neuronal markers and sodium channel function analyses indicated that iPSC-dSNs differentiated from low passage numbers better recapitulated the sensory neuron phenotype than those differentiated from intermediate or high passage numbers. Our results demonstrate that lower passage numbers may be better suited for differentiation into peripheral sensory neurons.


Subject(s)
Induced Pluripotent Stem Cells , Cell Differentiation/genetics , Electrophysiological Phenomena , Humans , Sensory Receptor Cells
2.
PLoS Genet ; 18(1): e1009968, 2022 01.
Article in English | MEDLINE | ID: mdl-34986146

ABSTRACT

Taxane-induced peripheral neuropathy (TIPN) is a devastating survivorship issue for many cancer patients. In addition to its impact on quality of life, this toxicity may lead to dose reductions or treatment discontinuation, adversely impacting survival outcomes and leading to health disparities in African Americans (AA). Our lab has previously identified deleterious mutations in SET-Binding Factor 2 (SBF2) that significantly associated with severe TIPN in AA patients. Here, we demonstrate the impact of SBF2 on taxane-induced neuronal damage using an ex vivo model of SBF2 knockdown of induced pluripotent stem cell-derived sensory neurons. Knockdown of SBF2 exacerbated paclitaxel changes to cell viability and neurite outgrowth while attenuating paclitaxel-induced sodium current inhibition. Our studies identified paclitaxel-induced expression changes specific to mature sensory neurons and revealed candidate genes involved in the exacerbation of paclitaxel-induced phenotypes accompanying SBF2 knockdown. Overall, these findings provide ex vivo support for the impact of SBF2 on the development of TIPN and shed light on the potential pathways involved.


Subject(s)
Paclitaxel/adverse effects , Peripheral Nervous System Diseases/genetics , Polymorphism, Single Nucleotide , Protein Tyrosine Phosphatases, Non-Receptor/genetics , Sensory Receptor Cells/cytology , Black or African American/genetics , Cell Survival/drug effects , Disease Progression , Female , Gene Knockdown Techniques , Humans , Induced Pluripotent Stem Cells/chemistry , Induced Pluripotent Stem Cells/cytology , Induced Pluripotent Stem Cells/drug effects , Paclitaxel/pharmacology , Peripheral Nervous System Diseases/chemically induced , Peripheral Nervous System Diseases/ethnology , Quality of Life , Sensory Receptor Cells/chemistry , Sensory Receptor Cells/drug effects , Sequence Analysis, RNA , Single-Cell Analysis , White People/genetics
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