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Skeletal muscle interleukin 15 promotes CD8+ T-cell function and autoimmune myositis

Overview of attention for article published in Skeletal Muscle, September 2015
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About this Attention Score

  • Above-average Attention Score compared to outputs of the same age (54th percentile)

Mentioned by

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3 tweeters

Citations

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23 Mendeley
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Title
Skeletal muscle interleukin 15 promotes CD8+ T-cell function and autoimmune myositis
Published in
Skeletal Muscle, September 2015
DOI 10.1186/s13395-015-0058-2
Pubmed ID
Authors

Po-Lin Huang, Mau-Sheng Hou, Szu-Wen Wang, Chin-Ling Chang, Yae-Huei Liou, Nan-Shih Liao

Abstract

Interleukin 15 (IL-15) is thought to be abundant in the skeletal muscle under steady state conditions based on RNA expression; however, the IL-15 RNA level may not reflect the protein level due to post-transcriptional regulation. Although exogenous protein treatment and overexpression studies indicated IL-15 functions in the skeletal muscle, how the skeletal muscle cell uses IL-15 remains unclear. In myositis patients, IL-15 protein is up-regulated in the skeletal muscle. Given the supporting role of IL-15 in CD8(+) T-cell survival and activation and the pathogenic role of cytotoxic CD8(+) T cells in polymyositis and inclusion-body myositis, we hypothesize that IL-15 produced by the inflamed skeletal muscle promotes myositis via CD8(+) T cells. Expression of IL-15 and IL-15 receptors at the protein level by skeletal muscle cells were examined under steady state and cytokine stimulation conditions. The functions of IL-15 in the skeletal muscle were investigated using Il15 knockout (Il15 (-/-) ) mice. The immune regulatory role of skeletal muscle IL-15 was determined by co-culturing cytokine-stimulated muscle cells and memory-like CD8(+) T cells in vitro and by inducing autoimmune myositis in skeletal-muscle-specific Il15 (-/-) mice. We found that the IL-15 protein was not expressed by skeletal muscle cells under steady state condition but induced by tumor necrosis factor alpha (TNF-α) and interferon gamma (IFN-γ) stimulation and expressed as IL-15/IL-15 receptor alpha (IL-15Rα) complex. Skeletal muscle cells expressed a scanty amount of IL-15 receptor beta (IL-15Rβ) under either conditions and only responded to a high concentration of IL-15 hyperagonist, but not IL-15. Consistently, deficiency of endogenous IL-15 affected neither skeletal muscle growth nor its responses to TNF-α and IFN-γ. On the other hand, the cytokine-stimulated skeletal muscle cells presented antigen and provided IL-15 to promote the effector function of memory-like CD8(+) T cells. Genetic ablation of Il15 in skeletal muscle cells greatly ameliorated autoimmune myositis in mice. These findings together indicate that skeletal muscle IL-15 directly regulates immune effector cells but not muscle cells and thus presents a potential therapeutic target for myositis.

Twitter Demographics

The data shown below were collected from the profiles of 3 tweeters 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 23 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 23 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 6 26%
Researcher 5 22%
Student > Master 3 13%
Student > Bachelor 2 9%
Student > Doctoral Student 2 9%
Other 4 17%
Unknown 1 4%
Readers by discipline Count As %
Medicine and Dentistry 6 26%
Biochemistry, Genetics and Molecular Biology 6 26%
Agricultural and Biological Sciences 3 13%
Immunology and Microbiology 3 13%
Pharmacology, Toxicology and Pharmaceutical Science 1 4%
Other 1 4%
Unknown 3 13%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. 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 28 December 2015.
All research outputs
#2,954,164
of 6,886,791 outputs
Outputs from Skeletal Muscle
#133
of 165 outputs
Outputs of similar age
#97,004
of 231,037 outputs
Outputs of similar age from Skeletal Muscle
#9
of 11 outputs
Altmetric has tracked 6,886,791 research outputs across all sources so far. This one has received more attention than most of these and is in the 54th percentile.
So far Altmetric has tracked 165 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.9. This one is in the 17th percentile – i.e., 17% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 231,037 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 54% of its contemporaries.
We're also able to compare this research output to 11 others from the same source and published within six weeks on either side of this one. This one is in the 9th percentile – i.e., 9% of its contemporaries scored the same or lower than it.