Abstract:
:Ectopic expression of metabotropic glutamate receptor subtype 1 (mGluR1) in mouse melanocytes induces melanoma formation. Although requirement of mGluR1 for development of melanoma in the initial stage has been demonstrated, its role in melanoma growth in vivo remains unclear. In this study, we developed novel transgenic mice that conditionally express mGluR1 in melanocytes, using a tetracycline regulatory system. Pigmented lesions on the ears and tails of the transgenic mice began to appear 29 weeks after activation of the mGluR1 transgene, and the transgenic mice produced melanomas at a frequency of 100% 52 weeks after transgene activation. Subsequent inactivation of the mGluR1 transgene in melanoma-bearing mice inhibited melanoma growth with reduction of immunoreactivity to phosphorylated ERK1/2, whereas mice with persistent expression of mGluR1 developed larger melanoma burdens. mGluR1 expression is thus required not only for melanoma development but also for melanoma growth in vivo. These findings suggest that growth of melanoma can be inhibited in vivo by eliminating only one of the multiple genetic anomalies involved in tumorigenesis.
journal_name
Oncogenejournal_title
Oncogeneauthors
Ohtani Y,Harada T,Funasaka Y,Nakao K,Takahara C,Abdel-Daim M,Sakai N,Saito N,Nishigori C,Aiba Adoi
10.1038/onc.2008.329subject
Has Abstractpub_date
2008-12-04 00:00:00pages
7162-70issue
57eissn
0950-9232issn
1476-5594pii
onc2008329journal_volume
27pub_type
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