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Circulating Muramyl Dipeptide Is Negatively Associated with Interleukin-10 in the Frail Elderly

Overview of attention for article published in Inflammation, October 2014
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Title
Circulating Muramyl Dipeptide Is Negatively Associated with Interleukin-10 in the Frail Elderly
Published in
Inflammation, October 2014
DOI 10.1007/s10753-014-0030-z
Pubmed ID
Authors

Chris P. Verschoor, Avee Naidoo, Jessica G. Wallace, Jennie Johnstone, Mark Loeb, Jonathan L. Bramson, Dawn ME Bowdish

Abstract

Elevated levels of serum cytokines, a marker of immune activation and chronic inflammation, are commonly associated with age and are a significant risk factor for all-cause mortality in the elderly. This phenomenon is very similar to that exhibited by individuals with diseases of inflammatory etiology and chronic viral infections such as human immunodeficiency virus (HIV). Although the origin of chronically elevated cytokines with age is unknown, for chronic diseases and viral infections, a role for circulating bacterial products and other pattern recognition receptor (PRR) ligands has been suggested. Given this, we sought to examine whether the levels of circulating cytokines (tumour necrosis factor (TNF), interferon-gamma (IFN-γ), interleukin (IL)-1β, IL-6, IL-8, IL-10, IL-12) in the advanced-age, frail elderly (n = 135) correlated with plasma levels of lipopolysaccharide (LPS), muramyl dipeptide (MDP), 16S ribosomal DNA, total cell-free DNA and host-derived mitochondrial DNA. After adjusting for multiple testing, no associations between circulating products and donor age, sex or comorbidities were observed. However, a significant negative correlation between MDP and IL-10 was identified. Given the anti-inflammatory nature of IL-10, a negative relationship with a potent inflammatory agonist such as MDP is not surprising and suggests a potential role for circulating MDP in the propagation of age-related immune activation.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 36 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Ireland 1 3%
Unknown 35 97%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 7 19%
Student > Doctoral Student 6 17%
Student > Master 5 14%
Researcher 4 11%
Student > Bachelor 3 8%
Other 3 8%
Unknown 8 22%
Readers by discipline Count As %
Medicine and Dentistry 8 22%
Agricultural and Biological Sciences 6 17%
Immunology and Microbiology 3 8%
Nursing and Health Professions 2 6%
Biochemistry, Genetics and Molecular Biology 2 6%
Other 5 14%
Unknown 10 28%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 October 2014.
All research outputs
#20,238,443
of 22,765,347 outputs
Outputs from Inflammation
#708
of 1,046 outputs
Outputs of similar age
#212,240
of 253,927 outputs
Outputs of similar age from Inflammation
#19
of 23 outputs
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We're also able to compare this research output to 23 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.