Evidence map›Paper›PMID 27039887›Full record

ReviewAgeing research reviews2016

Roles of the tyrosine isomers meta-tyrosine and ortho-tyrosine in oxidative stress.

Brett R Ipson, Alfred L Fisher

Open access · greenAbstract readReview
In one paragraph

Review in Ageing research reviews, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
3.8field-weighted citation impact, top 7% 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

49 citing papers in PubMed, 87 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Brett R IpsonMD/PhD Program, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Department of Cell and Structural Biology, Graduate School of Biomedical Sciences, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Center for Healthy Aging, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States.
Alfred L FisherCenter for Healthy Aging, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Department of Medicine, Division of Geriatrics, Gerontology, and Palliative Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; GRECC, South Texas VA Health Care System, San Antonio, TX, United States. Electronic address: Fishera2@uthscsa.edu.
The University of Texas Health Science Center at San Antonio · US

Funding

TRANSGENIC COREP30AG013319 · NIA · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI PETER J HORNSBY · 1995 to 2026
$30.6M
Effects of insulin-like signaling, aging, and ubiquinone on C. elegans muscleR01AG044768 · NIA · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI FISHER, ALFRED L · 2012 to 2016
$1.6M
Regulation on of the AIRAP/aip-1 pathway by metabolic stressR01ES017761 · NIEHS · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI FISHER, ALFRED L · 2010 to 2014
$1.1M
Contribution of m-tyrosine to the adverse effects of oxidative stressF30AG053034 · NIA · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI IPSON, BRETT · 2016 to 2019
$151k
NIA NIH HHS AG013319NIA NIH HHS AG044768NIA NIH HHS F30 AG053034NIA NIH HHS F30AG053034NIA NIH HHS P30 AG013319NIA NIH HHS R01 AG044768NIEHS NIH HHS ES017761NIEHS NIH HHS R01 ES017761
6 · The paper itself

Abstract

The damage to cellular components by reactive oxygen species, termed oxidative stress, both increases with age and likely contributes to age-related diseases including Alzheimer's disease, atherosclerosis, diabetes, and cataract formation. In the setting of oxidative stress, hydroxyl radicals can oxidize the benzyl ring of the amino acid phenylalanine, which then produces the abnormal tyrosine isomers meta-tyrosine or ortho-tyrosine. While elevations in m-tyrosine and o-tyrosine concentrations have been used as a biological marker of oxidative stress, there is emerging evidence from bacterial, plant, and mammalian studies demonstrating that these isomers, particularly m-tyrosine, directly produce adverse effects to cells and tissues. These new findings suggest that the abnormal tyrosine isomers could in fact represent mediators of the effects of oxidative stress. Consequently the accumulation of m- and o-tyrosine may disrupt cellular homeostasis and contribute to disease pathogenesis, and as result, effective defenses against oxidative stress can encompass not only the elimination of reactive oxygen species but also the metabolism and ultimately the removal of the abnormal tyrosine isomers from the cellular amino acid pool. Future research in this area is needed to clarify the biologic mechanisms by which the tyrosine isomers damage cells and disrupt the function of tissues and organs and to identify the metabolic pathways involved in removing the accumulated isomers after exposure to oxidative stress.

Indexed as

TyrosineAgingAnimalsBiomarkersIsomerismOxidative StressBiomarkersTyrosineAgingHydroxyl radicalmeta-Tyrosineortho-TyrosineOxidative stressTyrosine isomers

Identifiers

PMID27039887
PMCPMC4841466
OpenAlexW2314160720

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.