The exercise-regulated myokine chitinase-3-like protein 1 stimulates human myocyte proliferation

被引:46
作者
Goergens, S. W. [1 ]
Hjorth, M. [2 ]
Eckardt, K. [1 ,2 ]
Wichert, S. [1 ]
Norheim, F. [2 ]
Holen, T. [2 ]
Lee, S. [2 ]
Langleite, T. [2 ]
Birkeland, K. I. [2 ]
Stadheim, H. K. [3 ]
Kolnes, K. J. [4 ]
Tangen, D. S. [3 ]
Kolnes, A. J. [4 ]
Jensen, J. [3 ]
Drevon, C. A. [2 ]
Eckel, J. [1 ,5 ]
机构
[1] German Diabet Ctr DDZ, Paul Langerhans Grp Integrat Physiol, Dusseldorf, Germany
[2] Univ Oslo, Inst Basic Med Sci, Dept Nutr, Fac Med, Oslo, Norway
[3] Norwegian Sch Sport Sci, Dept Phys Performance, Oslo, Norway
[4] Charles Univ Prague, Fac Med 3, Prague, Czech Republic
[5] German Ctr Diabet Res DZD eV, Dusseldorf, Germany
关键词
chitinase-3-like protein 1; exercise; skeletal muscle; SKELETAL-MUSCLE; PLASMA YKL-40; TNF-ALPHA; INFLAMMATION; BIOMARKER; CONTRACTION; RESPONSES; ALIGNMENT; MARKERS; OBESITY;
D O I
10.1111/apha.12579
中图分类号
Q4 [生理学];
学科分类号
071003 [生理学];
摘要
AimChitinase-3-like protein 1 (CHI3L1) is involved in tissue remodelling and inflammatory processes. Plasma levels are elevated in patients with insulin resistance and T2DM. We recently showed that CHI3L1 and its receptor protease-activated receptor 2 (PAR-2) are expressed in skeletal muscle. Activation of PAR-2 by CHI3L1 protects against TNF--induced inflammation and insulin resistance. However, the effect of exercise on CHI3L1 and PAR-2 signalling remains unknown. The aim of this work was to study the impact of exercise on CHI3L1 production and the effect of CHI3L1/PAR-2 signalling on skeletal muscle growth and repair. MethodsThree human exercise studies were used to measure CHI3L1 plasma levels (n=32). In addition, muscle and adipose tissue CHI3L1 mRNA expression was measured in response to acute and long-term exercise (n=24). Primary human skeletal muscle cells were differentiated invitro, and electrical pulse stimulation was applied. In addition, myoblasts were incubated with CHI3L1 protein and activation of MAP kinase signalling as well as proliferation was measured. ResultsCirculating CHI3L1 levels and muscle CHI3L1 mRNA were increased after acute exercise. In addition, CHI3L1 mRNA expression as well as CHI3L1 secretion was enhanced in electrically stimulated cultured myotubes. Incubation of cultured human myoblasts with CHI3L1 protein leads to a strong activation of p44/42, p38 MAPK and Akt as well as enhanced myoblast proliferation. ConclusionOur findings suggest that CHI3L1 is induced by acute exercise and that CHI3L1/PAR-2 signalling activates myocyte proliferation, which is important for restructuring of skeletal muscle in the response to exercise training.
引用
收藏
页码:330 / 345
页数:16
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