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2014 ; 19
(5
): 322-9
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Silica exposure and altered regulation of autoimmunity
#MMPMID25135741
Lee S
; Matsuzaki H
; Kumagai-Takei N
; Yoshitome K
; Maeda M
; Chen Y
; Kusaka M
; Urakami K
; Hayashi H
; Fujimoto W
; Nishimura Y
; Otsuki T
Environ Health Prev Med
2014[Sep]; 19
(5
): 322-9
PMID25135741
show ga
Silica particles and asbestos fibers, which are known as typical causatives of
pneumoconiosis, induce lung fibrosis. Moreover, silicosis patients often
complicate with autoimmune diseases, and asbestos-exposed patients suffer from
malignant diseases such as pleural mesothelioma and lung cancer. We have been
conducting experimental studies to investigate altered regulation of
self-tolerance caused by silica exposure, including analyses using specimens such
as plasma and immunocompetent cells obtained from silicosis patients, as a means
of examining the supposition that silica exposure induces molecular and cellular
biological alterations of immune cells. These approaches have resulted in the
detection of several specific autoantibodies, alterations of CD95/Fas and its
related molecules, and evidence of chronic activation of responder T cells and
regulatory T cells following silica exposure. In this review, we present details
of our investigations as an introduction to scientific approaches examining the
immunological effects of environmental and occupational substances.