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8.3 GSH/GPX4 in AD Research has revealed that diminished glutathione (GSH) concentrations within the hippocampal and prefrontal regions align with pronounced memory impairment, pointing to GSH as a potential AD signature (Terluk et al., 2019

Notably, this PD-1 effect requires signaling through CD28 137 , highlighting the interplay between positive and negative signal 2s for T cells in cancer biology

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One prominent pathway is the Nrf2/ARE (nuclear factor erythroid 2-related factor 2/antioxidant response element) pathway (Liang et al., 2017

By contrast, other GH-axis compounds occupy different regulatory positions: tesamorelin is FDA-approved for a narrow HIV-associated lipodystrophy indication, and sermorelin retains a special status from its prior FDA approval