27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Individuals with Down syndrome (DS) commonly possess unique neurocognitive and neurobehavioral profiles that emerge within specific developmental periods. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Human cellular models of Alzheimer's disease (AD) pathogenesis would enable the investigation of candidate pathogenic mechanisms in AD and the testing and developing of new therapeutic strategies. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) brains display A beta (Abeta) plaques, inflammatory changes and neurofibrillary tangles (NFTs). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Altered neuronal endocytosis is the earliest known pathology in sporadic Alzheimer's disease (AD) and Down syndrome (DS) brain and has been linked to increased Abeta production. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Down syndrome (DS) is characterized by increased mortality rates, both during early and later stages of life, and age-specific mortality risk remains higher in adults with DS compared with the overall population of people with mental retardation and with typically developing populations. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The presence of the neuropathological alterations of Alzheimer's disease (AD) in essentially all older Down syndrome (DS) patients suggests that the examination of younger DS patients may clarify the early pathological progression of AD. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Most individuals with Down Syndrome (DS) show an early-onset of Alzheimer's disease (AD), which potentially results from the presence of an extra copy of a segment of chromosome 21. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Ts65Dn is a mouse model of Down syndrome: a syndrome that results from chromosome (Chr) 21 trisomy and is associated with congenital defects, cognitive impairment, and ultimately Alzheimer's disease. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Trisomy of the whole or distal part of human chromosome 21 (HSA 21) (Ts21) results in Down Syndrome (DS), which is characterized in part by mental retardation and associated neurological abnormalities. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Down syndrome (DS) is associated with a variety of symptoms, such as incapacitating mental retardation and neurodegeneration (i.e., Alzheimer's disease), that prevent patients from leading fully independent lives. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The endosome/lysosome pathway is disrupted early in the course of both Alzheimer's disease (AD) and Down syndrome (DS); however, it is not clear how dysfunction in this pathway influences the development of these diseases. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Down syndrome (DS) is caused by trisomy of all or part of human chromosome 21 (HSA21) and is the most common genetic cause of significant intellectual disability. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Mitochondrial dysfunction and oxidative stress are common features of Down syndrome (DS). 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Drebrin, located in the dendritic spines of the neuron, plays a role in the synaptic plasticity together with actin filaments. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Aberrant expression of the amyloid precursor protein (APP) gene may contribute to the beta-amyloid deposition seen in Alzheimer's disease and Down syndrome patients. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The previously reported high risk levels for dementia among people with Down syndrome was confirmed in these data as was the value of the instruments utilised in tracking decline and helping to confirm diagnosis even in persons with severe intellectual disability. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Amyloid beta protein (Abeta), the major component of neuritic plaques in Alzheimer's disease (AD), is derived from APP by sequential cleavages of beta- and gamma-secretases. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Similar to the state of the broader intellectual disabilities field, many gaps exist in the research and treatment of mental health concerns in people with Down syndrome. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
During the past few decades age at death for individuals with Down syndrome (DS) has increased dramatically. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Increasing evidence is implicating mitochondrial dysfunction as a central factor in the etiology of Alzheimer's disease (AD). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Individuals with Down syndrome (DS) develop most neuropathological hallmarks of Alzheimer's disease early in life, including loss of cholinergic markers in the basal forebrain. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is a devastating neurodegenerative condition and the most common type of amnestic dementia in the elderly. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
These findings suggest a disease stage dependent general activation of the immune system both in sporadic AD and in DS with AD. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
In addition to intellectual disability, individuals with Down syndrome (DS) exhibit dementia by the third or fourth decade of life, due to the early onset of neuropathological changes typical of Alzheimer's disease (AD). 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
In addition to mental retardation, individuals with Down syndrome (DS) also develop the neuropathological changes typical of Alzheimer's disease (AD) and the majority of these individuals exhibit dementia. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
7 of the 80 studies in this tag, picked by a fixed rule (a hash of each study's address), not by score or date; each page of this list shows a different 7. The same 7 appear here every time.
Free full text links and the Full text may need a subscription label come from Unpaywall, Europe PMC and OpenAlex records of free copies, checked 10 Oct 2026. A study with neither is unknown, not paywalled. Show only studies that are free to read
This is alzhub's own score. It is not an official metric, not an impact factor, and no journal, publisher or ranking body endorses it. We built it so that a reader who is not a scientist can tell a landmark trial from a conference abstract without having to already know the difference. Every point comes from one of 20 components, all of them printed on the study itself, so you can disagree with our arithmetic rather than having to trust the total.
Journals are placed in ordered tiers, never given a numeric impact factor — we could not verify current impact factors from a source we control, and an invented one would be worse than none. Tier 1 is the top-tier general journals (NEJM, The Lancet, JAMA, Nature, Science, Nature Medicine); tier 2 is the leading specialty journals; tier 3 is every other peer-reviewed journal. A separate part scores how much the journal's own papers are cited, which tells the tier-3 journals apart.
Two rules we don't bend. First, we never fill in a missing value: if a record does not state a sample size or a design, that component scores zero, and if we simply have no data for a part, such as a citation count, that part is left out and the study is scored on the parts we could check. The study card says which. Second, anything that is not a peer-reviewed article is capped at 16/100 and carries a warning chip — so a conference abstract or a company press release can never outrank a peer-reviewed paper, no matter how good it looks.
We rank a rigorous null result — a good trial showing that something does not work — above an early positive finding. Someone deciding whether to buy a supplement is served by that, and the rigour is already counted by the design and journal components.
The score is computed from the published data alone and is reproducible: the same file always yields the same numbers.
See the whole rubric drawn out → — four charts covering all 27,380 studies: how the scores are spread and where the cap bites, which of the 20 components the library is strong and weak on, which subjects rest on stronger evidence, and what kinds of study each subject is actually built from.
This is a large sample of the Alzheimer's literature, not an exhaustive index of it. It holds 27,380 records, built mostly from automated pulls of Europe PMC (60.6% of the library) and OpenAlex (18.6%), plus smaller pulls from PubMed, Crossref and medRxiv. If a study, a drug, or a finding isn't here, that is not evidence it doesn't exist in the literature — it may simply not have been pulled in yet.
1,032 records (3.8% of the library) are not peer-reviewed — 962 of those are preprints posted before any journal review, and the rest are conference abstracts, regulatory notices and reports. Every study card on this page states its status plainly, and the score above is capped for anything that isn't a peer-reviewed article.
See the full, machine-readable breakdown of this library's coverage →