| Autor: |
Hideki Tsumura, Morihiro Ito, Masamichi Takami, Miyuki Arai, Xiao-Kang Li, Toshio Hamatani, Arisa Igarashi, Shuji Takada, Kenji Miyado, Akihiro Umezawa, Yasuhiko Ito |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Biochemistry and Biophysics Reports, Vol 5, Iss C, Pp 203-210 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
2405-5808 |
| DOI: |
10.1016/j.bbrep.2015.11.023 |
| Popis: |
The CD98 heavy chain (CD98hc) regulates virus-induced cell fusion and monocyte fusion, and is involved in amino acid transportation. Here, we examined the role that CD98hc plays in the formation of osteoclasts using CD98hcflox/floxLysM-cre peritoneal macrophages (CD98hc-defect macrophages). Peritoneal macrophages were stimulated with co-cultured with osteoblasts in the presence of 1,25(OH)2 vitamin D3, and thereafter stained with tartrate-resistant acid phosphatase staining solution. The multinucleated osteoclast formation was severely impaired in the peritoneal macrophages isolated from the CD98hc-defect mice compared with those from wild-type mice. CD98hc mediates integrin signaling and amino acid transport through the CD98 light chain (CD98lc). In integrin signaling, suppression of the M-CSF-RANKL-induced phosphorylation of ERK, Akt, JNK and p130Cas were observed at the triggering phase in the CD98h-defect peritoneal macrophages. Moreover, we showed that the general control non-derepressible (GCN) pathway, which was activated by amino acid starvation, was induced by the CD98hc-defect peritoneal macrophages stimulated with RANKL. These results indicate that CD98 plays two important roles in osteoclast formation through integrin signaling and amino acid transport. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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