Role of Dkk2 in the Muscle/bone Interaction of Androgen-Deficient Mice
Role of Dkk2 in the Muscle/bone Interaction of Androgen-Deficient Mice
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Dkk2 在雄激素缺乏小鼠肌肉/骨骼相互作用中的作用
DOI：
10.1055/a-1331-7021
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发表时间：
2021
影响因子：
1.8
通讯作者：
Kaji Hiroshi
中科院分区：
文献类型：
--
作者：
Iemura Shunki;Kawao Naoyuki;Akagi Masao;Kaji Hiroshi
Androgen deficiency is known to cause both osteoporosis and sarcopenia. Myokines, humoral factors secreted from the skeletal muscles, have recently been getting attention as the key factors related to the interactions between muscle and bone. Dickkopf (Dkk) 2 is known as an inhibitor of canonical Wnt/β-catenin signaling, and Wnt/β-catenin signaling is crucial for the maintenance of muscle and bone. The present study was therefore performed to investigate the roles of Dkk2 in the alterations of muscle and bone of androgen-deficient mice with orchidectomy (ORX). ORX significantly enhanced Dkk2 mRNA levels, but not other Dkks and secreted frizzled related proteins, in the soleus muscles of mice. Moreover, ORX enhanced serum Dkk2 levels, but not Dkk2 mRNA levels in the tibial bone tissues, the white adipose tissues and liver of mice. In simple regression analyses, serum Dkk2 levels were negatively related to trabecular bone mineral density at the tibias in mice employed in the experiments.In vitroexperiments, testosterone suppressed Dkk2 mRNA levels in mouse muscle C2C12 cells. In conclusion, we showed that androgen deficiency enhances Dkk2 expression and secretion in the muscles of mice. Dkk2 might be involved in androgen deficiency-induced muscle wasting and osteopenia as a myokine linking muscle to bone.
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影响因子：
4.1
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Rudnicki MA;Williams BO
通讯作者：
Williams BO
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作者：
Carson JA;Manolagas SC
通讯作者：
Manolagas SC
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Tian, E;Zhan, FH;Shaughnessy, JD
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Shaughnessy, JD
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158.5
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Gharahdaghi, Nima;Rudrappa, Supreeth;Atherton, Philip J.
通讯作者：
Atherton, Philip J.