“…In 1963, Reah 11 reported up to an 18-year reduction in both males and females from a UK hospital clinic population from the 1950s. In 2001, Wong et al 12 found that, compared with a life expectancy of 22.0 years for the general population, this Arthritis, Rheumatism, and Aging Medical Information System Post-Marketing Surveillance cohort had a life expectancy of 18.6 years.…”
“…In 1963, Reah 11 reported up to an 18-year reduction in both males and females from a UK hospital clinic population from the 1950s. In 2001, Wong et al 12 found that, compared with a life expectancy of 22.0 years for the general population, this Arthritis, Rheumatism, and Aging Medical Information System Post-Marketing Surveillance cohort had a life expectancy of 18.6 years.…”
“…RA is associated with significant levels of morbidity and mortality and has a significant impact on total health care costs. 2,3 Patients with moderate to severe RA have benefited from the availability of injectable biological disease-modifying antirheumatic drugs (DMARDs), which include the tumor necrosis factor (TNF) antagonists ( 4 However, the full benefit of biological DMARDs can be achieved only if patients adhere to and continue with the prescribed medication regimen.…”
Section: ■■ Methods Program Description and Implementationmentioning
“…One of the immune system aberrations associated with advanced age is an increasing frequency of autoimmune diseases, including rheumatoid arthritis (RA) 3 -a chronic, inflammatory disease with very high impact on the quality of life of a huge proportion (ϳ1%) of world population, permanently crippling ϳ30% of sufferers (21). Estimated lifespan of RA patients is 10 -15 years shorter than that of healthy age-matched cohort (21). The disease manifests itself as proliferative inflammation of the intraarticular synovial tissue and at its advanced stages is usually involving progressive destruction of multiple symmetric joints and adjacent bones.…”
Human CD4+ T lymphocytes undergo aging-related changes leading to decreased immunity to infections and neoplasms, and to increased frequency of autoimmune diseases including rheumatoid arthritis (RA). Certain changes, observed in the CD4+ cells of RA patients, resemble those observed during physiological aging, but occur at earlier age. Underlying cellular mechanism(s) of these similarities are so far largely unknown. Here we show that KLOTHO, a β-glucuronidase gene whose activity changes are associated with aging phenotype, is down-regulated at the mRNA, protein, and enzymatic (β-glucuronidase) activity levels both in the healthy elderly and especially in RA CD4+ lymphocytes. Although the exact role of Klotho activity for CD4+ cell function is unknown, we propose here that it might be involved in anti-inflammatory processes occurring in the young and healthy individuals, but reduced in both healthy elderly and RA patients. To support this hypothesis, we show here that the reduction of Klotho expression and activity in both elderly and patients’ lymphocytes occurs in concert with the down-regulation of T cell costimulatory molecule CD28, the latter known to be dependent on increased levels of TNF-α. Thus, a common mechanism of KLOTHO down-regulation, but executed at various times in life, may underlie both physiological and disease-related T cell aging. Klotho activity might become a target of anti-RA drug development as well as a tool to help increase the immune system efficiency in the elderly.
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