Evidence map›Paper›PMID 26890756›Full record

ArticleJournal of Alzheimer's disease : JAD2016

The Presence of Select Tau Species in Human Peripheral Tissues and Their Relation to Alzheimer's Disease.

Brittany N Dugger, Charisse M Whiteside, Chera L Maarouf, Douglas G Walker, Thomas G Beach, Lucia I Sue, Angelica Garcia, Travis Dunckley, Bessie Meechoovet, Eric M Reiman and 1 more

Erratum issuedOpen access · greenAbstract read
In one paragraph

Article in Journal of Alzheimer's disease : JAD, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 55 papers.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed
3.1field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

55 citing papers in PubMed, 94 citations in OpenAlex.

  1. Article
  2. Article
  3. Research progress on biomarkers of traumatic brain injury.Animal models and experimental medicine · 2026
    Review
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  18. Article
  19. Peripheral proteinopathy in neurodegenerative diseases.Translational neurodegeneration · 2025
    Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 1 country.

Brittany N DuggerBanner Sun Health Research Institute, Sun City, AZ, USA.
Charisse M WhitesideBanner Sun Health Research Institute, Sun City, AZ, USA.
Chera L MaaroufBanner Sun Health Research Institute, Sun City, AZ, USA.
Douglas G WalkerBanner Sun Health Research Institute, Sun City, AZ, USA.
Thomas G BeachBanner Sun Health Research Institute, Sun City, AZ, USA.
Lucia I SueBanner Sun Health Research Institute, Sun City, AZ, USA.
Angelica GarciaBanner Sun Health Research Institute, Sun City, AZ, USA.
Travis DunckleyTranslational Genomics Research Institute, Phoenix, AZ, USA.
Bessie MeechoovetTranslational Genomics Research Institute, Phoenix, AZ, USA.
Eric M ReimanBanner Alzheimer's Institute, Phoenix, AZ, USA.
Alex E RoherBanner Sun Health Research Institute, Sun City, AZ, USA.
Alzheimer's Association · USArizona Alzheimer’s ConsortiumBanner Sun Health Research Institute · US

Funding

Research Education ComponentP30AG019610 · NIA · SUN HEALTH RESEARCH INSTITUTE · PI GONZALEZ HERNANDEZ, GRACIELA · 2001 to 2020
$32.5M
National Brain and Tissue Resource for Parkinson's Disease and Related DisordersU24NS072026 · NINDS · BANNER SUN HEALTH RESEARCH INSTITUTE · PI BEACH, THOMAS G · 2011 to 2015
$7.8M
NIA NIH HHS P30 AG019610NINDS NIH HHS U24 NS072026
6 · The paper itself

Abstract

Tau becomes excessively phosphorylated in Alzheimer's disease (AD) and is widely studied within the brain. Further examination of the extent and types of tau present in peripheral tissues and their relation to AD is warranted given recent publications on pathologic spreading. Cases were selected based on the presence of pathological tau spinal cord deposits (n = 18). Tissue samples from sigmoid colon, scalp, abdominal skin, liver, and submandibular gland were analyzed by western blot and enzyme-linked immunosorbent assays (ELISAs) for certain tau species; frontal cortex gray matter was used for comparison. ELISAs revealed brain to have the highest total tau levels, followed by submandibular gland, sigmoid colon, liver, scalp, and abdominal skin. Western blots with antibodies recognizing tau phosphorylated at threonine 231(pT231), serine 396 and 404 (PHF-1), and an unmodified total human tau between residues 159 and 163 (HT7) revealed multiple banding patterns, some of which predominated in peripheral tissues. As submandibular gland had the highest levels of peripheral tau, a second set of submandibular gland samples were analyzed (n = 36; 19 AD, 17 non-demented controls). ELISAs revealed significantly lower levels of pS396 (p = 0.009) and pT231 (p = 0.005) in AD cases but not total tau (p = 0.18). Furthermore, pT231 levels in submandibular gland inversely correlated with Braak neurofibrillary tangle stage (p = 0.04), after adjusting for age at death, gender, and postmortem interval. These results provide evidence that certain tau species are present in peripheral tissues. Of potential importance, submandibular gland pT231 is progressively less abundant with increasing Braak neurofibrillary tangle stage.

Indexed as

AgedAged, 80 and overAgingAlzheimer DiseaseBlotting, WesternColonEnzyme-Linked Immunosorbent AssayFemaleFrontal LobeGray MatterHumansImmunohistochemistryLiverMaleNeurofibrillary TanglesPhosphorylationMAPT protein, humantau ProteinsBraak NFT stagecolon, HT7liverPHF-1propagationskinspreadsubmandibular glandT231

Identifiers

PMID26890756
PMCPMC6074044
OpenAlexW2281527356

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.