Temporal and regional progression of Alzheimer’s disease‐like pathology in 3xTg‐AD mice

The Abstract says cognitive decline in the female 3xTg-AD mice studied was first apparent at 6 months, not 3–4 months. The Results section, “Learning and memory impairments in 3xTg-AD mice” (page unavailable), reports significant deficits at 6 months; the study tested mice at 2 and 6 months but not at 3–4 months. (LLM, conf=0.88)

Checked by a reasoning model — may be wrong.

The Results sections on plaque accumulation and tau pathology (page unavailable) show age- and region-dependent changes in female 3xTg-AD mice: plaques first appear in the hippocampus at 6 months, and phosphorylated-tau immunoreactivity becomes extensive there at 12 and 20 months. The paper measures phosphorylated tau, not the formation or extent of tangles, so it does not establish that plaques appeared before tangles or that tangles were extensive in older mice. (LLM, conf=0.86)

The Results sections on plaques and tau pathology document age-dependent, region-specific progression, and the Discussion describes a consistent, predictable phenotype in female 3xTg-AD mice. The claim leaves that qualification out: the Animals section says only females were analyzed because males in this colony showed substantial neuropathological variability, and the Introduction notes differences among sublines. (LLM, conf=0.84)

The Results sections on plaque accumulation and tau pathology report both pathologies in 12- and 20-month-old 3xTg-AD mice, with significant age-dependent increases in immunoreactivity. The paper studied 2-, 6-, 12-, and 20-month-old mice, not 15-month-old mice, so it does not directly establish the claim at that age. (LLM, conf=0.85)

The Results section reports detectable tau phosphorylation in the hippocampus of female 3xTg-AD mice at 6 months. It does not establish that neurofibrillary tangles first appear after 12 months; the age-related findings concern phosphorylated-tau immunoreactivity, not tangle formation (page not provided). (LLM, conf=0.86)

The Results section (page unavailable) reports plaques first in the caudal hippocampus, in all three hippocampal regions by 12 months, and first detectable in several cortical regions at 12 months. Calling the spread “extensive” by that age overstates the finding: the paper says plaques were present throughout the cortex at 20 months. (LLM, conf=0.82)

The Results section on age-dependent plaque accumulation (page unavailable) reports that extracellular Aβ plaques were absent at 2 months and first detected in the hippocampus at 6 months. It does not establish that intraneuronal Aβ begins accumulating around 2 months; a search for “intraneuronal” found no passage reporting that onset. (LLM, conf=0.87)

The Results sections on microgliosis and Aβ plaques report that microglial activation and extracellular plaques were first detected at 6 months in female 3xTg-AD mice, supporting the general progression described. The paper does not establish a shift from intraneuronal to extracellular deposition at around 9 months; it did not assess a 9-month group. (LLM, conf=0.87)

The Introduction says 3xTg-AD mice accumulate plaques and tangles, and the Discussion contrasts their Aβ and tau pathology with that of most other mouse models. The Animals section says only females were studied because males in this colony showed substantial neuropathological variability; it does not establish stark sexual dimorphism through a male–female comparison. No page numbers are available in our copy. (LLM, conf=0.86)