30,580 Alzheimer's and dementia studies in plain English, each scored out of 100.
The blood-brain barrier (BBB) limits entry of blood-derived products, pathogens, and cells into the brain that is essential for normal neuronal functioning and information processing. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
The glymphatic system is a recently defined brain-wide paravascular pathway for cerebrospinal fluid (CSF) and interstitial fluid (ISF) exchange that facilitates efficient clearance of solutes and waste from the brain. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
To study the putative precursor proteins (PreA4(695), PreA4(751), and PreA4(770] of Alzheimer's disease A4 amyloid protein, polyclonal and monoclonal antibodies were raised against a recombinant bacterial PreA4(695) fusion protein. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
MicroRNAs have essential functional roles in brain development and neuronal specification but their roles in neurodegenerative diseases such as Alzheimer's disease (AD) is unknown. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
ACTH release results in the release of corticosteroids from the adrenal that, subsequently, through mineralocorticoid and glucocorticoid receptors, exert negative feedback on, among other things, the hippocampus, the pituitary and the hypothalamus. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Excessive cerebral accumulation of the 42-residue amyloid beta-protein (Abeta) is an early and invariant step in the pathogenesis of Alzheimer's disease. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Interleukin-1 beta (IL-1 beta), interleukin-2 (IL-2), and interleukin-6 (IL-6) were measured in the cerebrospinal fluid (CSF) and plasma of 12 control subjects, 11 sporadic Alzheimer's disease (AD) and 22 de novo Parkinson's disease (PD) patients using high sensitivity enzyme-linked immunosorbent assays (ELISA). 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Considerable evidence has accrued in the last two decades to support the hypothesis that alterations in serotonergic neuronal function in the central nervous system occur in patients with major depression. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Glymphatic transport, defined as cerebrospinal fluid (CSF) peri-arterial inflow into brain, and interstitial fluid (ISF) clearance, is reduced in the aging brain. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Biochemical and immunocytochemical analyses were performed to evaluate the composition of the amyloid beta protein (A beta) deposited in the brains of patients with Alzheimer's disease (AD). 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Aggregation of β-amyloid (Aβ) in the brain begins to occur years before the clinical onset of Alzheimer's disease (AD). 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
The origin of ramified microglia has been a longstanding controversial issue, with 4 major schools of thought, which state that they are derived (1) from invasion of mesodermal pial elements, (2) from neuroectodermal matrix cells together with the macroglia, (3) from pericytes, and (4) from invasion of monocytes in early development. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Apolipoprotein E gene (APOE) alleles may shift the onset of Alzheimer's disease (AD) through apoE protein isoforms changing the probability of amyloid-β (Aβ) accumulation. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The choroid plexus epithelium is a cuboidal cell monolayer, which produces the majority of the cerebrospinal fluid. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
Choline acetyltransferase (ChAT), acetylcholinesterase (AChE) and glutamic acid decarboxylase (GAD) activities were measured in 20 brain regions from autopsied control and senile dementia of the Alzheimer type (SDAT) cases. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Activated monocytes release a number of substances, including inflammatory cytokines and eicosanoids, that are highly toxic to cells of the central nervous system. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
These results imply that individuals with MCI have increased brain oxidative damage before the onset of symptomatic dementia. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The delivery of many potentially therapeutic and diagnostic compounds to specific areas of the brain is restricted by brain barriers, of which the most well known are the blood-brain barrier (BBB) and the blood-cerebrospinal fluid (CSF) barrier. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The betaA4 peptide, a major component of senile plaques in Alzheimer's disease (AD) brain, has been found in cerebrospinal fluid (CSF) and blood of both AD patients and normal subjects. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Magnetic resonance imaging (MRI) patterns were examined together with cerebrospinal fluid (CSF) biomarkers in serial scans of Alzheimer's Disease Neuroimaging Initiative (ADNI) participants with mild cognitive impairment (MCI). 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Aggregation of amyloid-β (Aβ) into oligomers, fibrils, and plaques is central in the molecular pathogenesis of Alzheimer's disease (AD), and is the main focus of AD drug development. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The theory on the glymphatic convection mechanism of cerebrospinal fluid holds that cardiac pulsations in part pump cerebrospinal fluid from the peri-arterial spaces through the extracellular tissue into the peri-venous spaces facilitated by aquaporin water channels. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
A nanoscale optical biosensor based on localized surface plasmon resonance (LSPR) spectroscopy has been developed to monitor the interaction between the antigen, amyloid-beta derived diffusible ligands (ADDLs), and specific anti-ADDL antibodies. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Recent studies indicated that the formation of a major constituent of Alzheimer's disease (AD) senile plaques, called beta A4-peptide, does not result from normal processing of its precursor, amyloid precursor protein (APP). 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Recent neuropsychological studies suggest that, in addition to prominent mnemonic dysfunction, attentional impairments are a core feature of Alzheimer disease (AD). 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
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 30,580 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 30,580 records, built mostly from automated pulls of Europe PMC (64.7% of the library) and OpenAlex (16.6%), 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.
1,037 records (3.4% of the library) are not peer-reviewed — 964 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 →
Newest studies, as a dated timeline → Atom feed Where this research is being discussed: events