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- W4295394754 abstract "There is evidence for the involvement of human skeletal muscle (hSKM) in ALS neuromuscular junction (NMJ) dysfunction. However, the specific avenue by which the hSKM contributes to NMJ disruption is not well understood due to limited human-based studies performed to investigate the subject. Thus, hSKM and human motoneurons (hMN) generated from induced pluripotent stem cells of healthy individuals (WT) and ALS patients with two different SOD1 mutations were integrated into functional NMJ systems to investigate and compare the pathological contribution of the hSKM and hMN to ALS NMJ disruption. Morphological assessment of ALS NMJs demonstrated reduced acetylcholine receptor clustering in the post-synaptic membrane of co-cultures with ALS hSKM (hSKMSOD1-hMNWT and hSKMSOD1-hMNSOD1). Significantly reduced functional NMJ numbers, NMJ stability, contraction fidelity and increased fatigue index were observed in all ALS co-cultures compared to WT. However, these disease phenotypes were comparatively more severe in microphysiologic systems with hSKMSOD1-hMNWT or hSKMSOD1-hMNSOD1 than those with hSKMWT-hMNSOD1 co-cultures. Results from this study affirm that the inherent pathological defects in ALS hSKM, independent of motoneurons, significantly contributes to NMJ dysfunction. As such, therapeutically targeting the ALS hSKM may be just as, if not more critical than, the hMN in alleviating disease phenotypes and attenuating disease progression." @default.
- W4295394754 created "2022-09-13" @default.
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- W4295394754 date "2022-10-01" @default.
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- W4295394754 title "ALS mutations in both human skeletal muscle and motoneurons differentially affects neuromuscular junction integrity and function" @default.
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- W4295394754 doi "https://doi.org/10.1016/j.biomaterials.2022.121752" @default.
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