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flag A new study shows ALS motor neurons degenerate due to high metabolic stress and overwhelmed protein cleanup systems.

flag A new study published on October 27, 2025, reveals that large motor neurons in ALS face chronic internal stress due to high metabolic demands and constant protein and organelle cleanup, relying heavily on autophagy and the unfolded protein response. flag The loss of TDP-43, linked to most ALS cases, initially supports neuron function but eventually overwhelms these protective systems. flag Using zebrafish models, researchers found this intrinsic burden, driven by cell size and energy needs, makes motor neurons uniquely vulnerable, explaining their selective degeneration. flag The findings point to reducing cellular degradation pressure as a potential treatment strategy.

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