NFAT1 Directly Regulates IL8 and MMP3 to Promote Melanoma Tumor Growth and Metastasis.

Autor:	Shoshan E; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Braeuer RR; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Kamiya T; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Mobley AK; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Huang L; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Vasquez ME; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Velazquez-Torres G; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Chakravarti N; Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Ivan C; Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Prieto V; Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas., Villares GJ; Department of Biology, University of St. Thomas, Houston, Texas., Bar-Eli M; Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas. mbareli@mdanderson.org.
Jazyk:	angličtina
Zdroj:	Cancer research [Cancer Res] 2016 Jun 01; Vol. 76 (11), pp. 3145-55. Date of Electronic Publication: 2016 Mar 24.
DOI:	10.1158/0008-5472.CAN-15-2511
Abstrakt:	Nuclear factor of activated T cell (NFAT1, NFATC2) is a transcription factor that binds and positively regulates IL2 expression during T-cell activation. NFAT1 has important roles in both innate and adaptive immune responses, but its involvement in cancer is not completely understood. We previously demonstrated that NFAT1 contributes to melanoma growth and metastasis by regulating the autotaxin gene (Enpp2). Here, we report a strong correlation between NFAT1 expression and metastatic potential in melanoma cell lines and tumor specimens. To elucidate the mechanisms underlying NFAT1 overexpression during melanoma progression, we conducted a microarray on a highly metastatic melanoma cell line in which NFAT1 expression was stably silenced. We identified and validated two downstream targets of NFAT1, IL8, and MMP3. Accordingly, NFAT1 depletion in metastatic melanoma cell lines was associated with reduced IL8 and MMP3 expression, whereas NFAT1 overexpression in a weakly metastatic cell line induced expression of these targets. Restoration of NFAT1 expression recovered IL8 and MMP3 expression levels back to baseline, indicating that both are direct targets of NFAT1. Moreover, in vivo studies demonstrated that NFAT1 and MMP3 promoted melanoma tumor growth and lung metastasis. Collectively, our findings assign a new role for NFAT1 in melanoma progression, underscoring the multifaceted functions that immunomodulatory factors may acquire in an unpredictable tumor microenvironment. Cancer Res; 76(11); 3145-55. ©2016 AACR. (©2016 American Association for Cancer Research.)
Databáze:	MEDLINE
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