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Molecular alterations in skeletal muscle in rheumatoid arthritis are related to disease activity, physical inactivity, and disability

Overview of attention for article published in Arthritis Research & Therapy, January 2017
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Title
Molecular alterations in skeletal muscle in rheumatoid arthritis are related to disease activity, physical inactivity, and disability
Published in
Arthritis Research & Therapy, January 2017
DOI 10.1186/s13075-016-1215-7
Pubmed ID
Authors

Kim M. Huffman, Ryan Jessee, Brian Andonian, Brittany N. Davis, Rachel Narowski, Janet L. Huebner, Virginia B. Kraus, Julie McCracken, Brian F. Gilmore, K. Noelle Tune, Milton Campbell, Timothy R. Koves, Deborah M. Muoio, Monica J. Hubal, William E. Kraus

Abstract

To identify molecular alterations in skeletal muscle in rheumatoid arthritis (RA) that may contribute to ongoing disability in RA. Persons with seropositive or erosive RA (n = 51) and control subjects matched for age, gender, race, body mass index (BMI), and physical activity (n = 51) underwent assessment of disease activity, disability, pain, physical activity and thigh muscle biopsies. Muscle tissue was used for measurement of pro-inflammatory markers, transcriptomics, and comprehensive profiling of metabolic intermediates. Groups were compared using mixed models. Bivariate associations were assessed with Spearman correlation. Compared to controls, patients with RA had 75% greater muscle concentrations of IL-6 protein (p = 0.006). In patients with RA, muscle concentrations of inflammatory markers were positively associated (p < 0.05 for all) with disease activity (IL-1β, IL-8), disability (IL-1β, IL-6), pain (IL-1β, TNF-α, toll-like receptor (TLR)-4), and physical inactivity (IL-1β, IL-6). Muscle cytokines were not related to corresponding systemic cytokines. Prominent among the gene sets differentially expressed in muscles in RA versus controls were those involved in skeletal muscle repair processes and glycolytic metabolism. Metabolic profiling revealed 46% higher concentrations of pyruvate in muscle in RA (p < 0.05), and strong positive correlation between levels of amino acids involved in fibrosis (arginine, ornithine, proline, and glycine) and disability (p < 0.05). RA is accompanied by broad-ranging molecular alterations in skeletal muscle. Analysis of inflammatory markers, gene expression, and metabolic intermediates linked disease-related disruptions in muscle inflammatory signaling, remodeling, and metabolic programming to physical inactivity and disability. Thus, skeletal muscle dysfunction might contribute to a viscous cycle of RA disease activity, physical inactivity, and disability.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 95 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 95 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 13 14%
Student > Ph. D. Student 12 13%
Researcher 10 11%
Student > Postgraduate 8 8%
Professor 8 8%
Other 24 25%
Unknown 20 21%
Readers by discipline Count As %
Medicine and Dentistry 21 22%
Biochemistry, Genetics and Molecular Biology 17 18%
Sports and Recreations 10 11%
Agricultural and Biological Sciences 5 5%
Engineering 5 5%
Other 12 13%
Unknown 25 26%

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 25 May 2017.
All research outputs
#9,295,223
of 11,622,318 outputs
Outputs from Arthritis Research & Therapy
#1,445
of 1,602 outputs
Outputs of similar age
#230,781
of 324,905 outputs
Outputs of similar age from Arthritis Research & Therapy
#17
of 21 outputs
Altmetric has tracked 11,622,318 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,602 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.5. This one is in the 9th percentile – i.e., 9% of its peers scored the same or lower than it.
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We're also able to compare this research output to 21 others from the same source and published within six weeks on either side of this one. This one is in the 4th percentile – i.e., 4% of its contemporaries scored the same or lower than it.