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2015 ; 3
(9
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Exercise training attenuates neutrophil infiltration and elastase expression in
adipose tissue of high-fat-diet-induced obese mice
#MMPMID26341995
Kawanishi N
; Niihara H
; Mizokami T
; Yada K
; Suzuki K
Physiol Rep
2015[Sep]; 3
(9
): ä PMID26341995
show ga
The innate immune system is associated with the development of local
inflammation. Neutrophils play an essential role in the development of the
adipose tissue (AT) inflammation associated with obesity by producing elastase,
which can promote the activation and infiltration of macrophages. Exercise
training attenuates AT inflammation via suppression of macrophage infiltration.
However, the mechanisms driving this phenomenon remains to be elucidated. Here,
we evaluated the effects of exercise training on the infiltration of neutrophils
and elastase expression in an obese mouse model. Four-week-old male C57BL/6J mice
were randomly assigned to one of three groups that either received a normal diet
(ND) plus sedentary activity (n = 15), a high-fat diet (HFD) plus sedentary
activity (n = 15), or a HFD plus exercise training (n = 15). Mice were fed the ND
or HFD from the age of 4 weeks until 20 weeks. Mice in the exercise group ran on
a treadmill for 60 min/day, 5 days/week over the same experimental period. Mice
fed with the HFD had increased content of macrophages in the AT and increased
inflammatory cytokine mRNA levels, which were reduced by exercise training.
Similarly, AT from the HFD sedentary mice contained more neutrophils than AT from
the ND mice, and the amount of neutrophils in this tissue in HFD-fed mice was
lowered by exercise training. The mRNA levels of neutrophil elastase in AT were
lower in the HFD exercise-trained mice than those in the HFD sedentary mice.
These results suggest that exercise training plays a critical role in reducing
macrophage infiltration and AT inflammation by regulating the infiltration of
neutrophils.