An RNA‐dependent protein kinase is involved in tunicamycin‐induced apoptosis and Alzheimer's disease

The section “Levels of nuclear PKR in AD brain tissue” reports elevated phosphorylated PKR in AD brain tissue and suggests an association with AD pathology in neurons. The paper mentions eIF2α phosphorylation as a pathway involving PKR, but does not report phosphorylated eIF2α in AD brains. Its Discussion also notes that neurons with aggregated PKR had not apparently undergone apoptosis, so the evidence does not directly establish an association with degenerating neurons. (LLM, conf=0.88)

The Introduction and ‘Levels of nuclear PKR in AD brain tissue’ report elevated PKR in AD brains and suggest a relationship with neuronal cell death. But the Discussion says that many AD-brain cells with PKR aggregates had not apparently undergone apoptosis. This paper does not examine mononuclear cells or AD transgenic mice, and its PKR-related cell-death experiments used tunicamycin rather than Aβ. (LLM, conf=0.85)

The ‘Levels of nuclear PKR in AD brain tissue’ section (p. 963) reports significantly higher phosphorylated PKR in AD brains than in controls. The Introduction explains that PKR can act through eIF2α to block protein synthesis, but the paper does not show altered eIF2α signalling or translation in AD brains; it also does not study AD lymphocytes. (LLM, conf=0.87)

The ‘Levels of nuclear PKR in AD brain tissue’ section (page not available) reports nuclear PKR aggregates and elevated phosphorylated PKR in AD brains. It does not report localization around amyloid deposits or establish that the localized protein was phosphorylated specifically at Thr451; the paper identifies its anti-phospho-PKR antibody as recognizing Thr446. No Braak score is given in the passages examined. (LLM, conf=0.90)