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Age-associated changes in rat immune system: Lessons learned from experimental autoimmune encephalomyelitis

Overview of attention for article published in Experimental Gerontology, October 2014
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (85th percentile)
  • Good Attention Score compared to outputs of the same age and source (76th percentile)

Mentioned by

blogs
1 blog
twitter
1 tweeter

Citations

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25 Dimensions

Readers on

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33 Mendeley
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Title
Age-associated changes in rat immune system: Lessons learned from experimental autoimmune encephalomyelitis
Published in
Experimental Gerontology, October 2014
DOI 10.1016/j.exger.2014.08.005
Pubmed ID
Authors

Jasmina Djikić, Mirjana Nacka-Aleksić, Ivan Pilipović, Zorica Stojić-Vukanić, Biljana Bufan, Duško Kosec, Mirjana Dimitrijević, Gordana Leposavić

Abstract

Aging is associated with the decline in immune response to infectious agents and tumors and increasing risk of autoimmunity, but the incidence of autoimmune diseases does not increase in the elderly. To elucidate the cellular and molecular mechanisms influencing clinical expression of autoimmunity in aged animals, the phenotypic and functional characteristics of mononuclear cells isolated from the spinal cords of 3-month-old (young) and 26-month-old (aged) Dark Agouti rats immunized to induce experimental autoimmune encephalomyelitis (EAE) - the model of multiple sclerosis, the most common autoimmune disease of the central nervous system, were examined. Aged rats were less susceptible to EAE induction, and the neurological and histological picture was milder in those rats which developed the clinically manifested disease. At the peak of the disease, several times fewer mononuclear cells and T lymphocytes were isolated from the spinal cords of aged rats compared with the young ones. The frequency of CD4+ cells among TCRαβ+ lymphocytes, as well as that of reactivated CD134(OX40)+ cells within its CD4+ T-lymphocyte subpopulation, was less in spinal cords of aged compared with young rats. Additionally, CD134 surface density on CD4+ lymphocytes was decreased in the spinal cord of aged rats. The changes in CD134 expression most likely reflected in part age-related intrinsic changes in CD4+ lymphocytes as the expression of this molecule was also impaired on in vitro stimulated naïve CD4+ splenocytes from aged rats compared with young animals. In addition, greater frequency of CD8+ lymphocytes with regulatory phenotypes could also contribute to impaired CD4+ cell reactivation in aged rats. The increased apoptosis of CD4+ cells from aged rats was consistent with their impaired reactivation and it was accompanied by the greater frequency of CD4+CD11b+CD45(int/high) cells, which are supposed to be actively engaged in apoptotic cell phagocytosis and to have immunoregulatory properties. Compared with young rats, following short-term PMA and ionomycin stimulation in vitro, the frequency of IL-17+ and IFN-γ+CD4+ T lymphocytes among the spinal cord mononuclear cells from aged rats and the cytokine expression density on a per lymphocyte basis were reduced. Additionally, the increase in the proportion of autoregulatory IL-17+IL-10+ on the account of proinflammatory IL-17+IFN-γ+ cells within IL-17+ lymphocytes suggested their lower pathogenic capacity in aged rats. This most likely reflected alterations in the aged rat spinal cord cytokine milieu, which were mirrored in a diminished expression of IL-1β mRNA followed by an enhanced expression of IL-6 and TGF-β mRNA. Overall, the study points to age-related changes in T lymphocytes and other cells from the spinal cord infiltrate which could contribute to the decreased susceptibility of aged rats to the induction of EAE.

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 33 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Portugal 1 3%
Unknown 32 97%

Demographic breakdown

Readers by professional status Count As %
Researcher 9 27%
Student > Master 4 12%
Student > Ph. D. Student 4 12%
Professor > Associate Professor 3 9%
Student > Bachelor 3 9%
Other 5 15%
Unknown 5 15%
Readers by discipline Count As %
Medicine and Dentistry 6 18%
Agricultural and Biological Sciences 5 15%
Biochemistry, Genetics and Molecular Biology 4 12%
Pharmacology, Toxicology and Pharmaceutical Science 2 6%
Immunology and Microbiology 2 6%
Other 7 21%
Unknown 7 21%

Attention Score in Context

This research output has an Altmetric Attention Score of 9. 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 08 August 2015.
All research outputs
#1,571,294
of 12,015,871 outputs
Outputs from Experimental Gerontology
#271
of 1,537 outputs
Outputs of similar age
#28,416
of 201,134 outputs
Outputs of similar age from Experimental Gerontology
#10
of 42 outputs
Altmetric has tracked 12,015,871 research outputs across all sources so far. Compared to these this one has done well and is in the 86th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,537 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.3. This one has done well, scoring higher than 82% of its peers.
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 201,134 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 85% of its contemporaries.
We're also able to compare this research output to 42 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 76% of its contemporaries.