Autocrine/paracrine actions of growth hormone in human melanoma cell lines.

Published on Mar 1, 2020in Biochemistry and biophysics reports
· DOI :10.1016/J.BBREP.2019.100716
Ashiya Buckels2
Estimated H-index: 2
(UAB: University of Alabama at Birmingham),
Yue Zhang15
Estimated H-index: 15
(UAB: University of Alabama at Birmingham)
+ 4 AuthorsStuart J. Frank45
Estimated H-index: 45
(UAB: University of Alabama at Birmingham)
Abstract Melanoma is the most aggressive skin cancer. Its aggressiveness is most commonly attributed to ERK pathway mutations leading to constitutive signaling. Though initial tumor regression results from targeting this pathway, resistance often emerges. Interestingly, interrogation of the NCI-60 database indicates high growth hormone receptor (GHR) expression in melanoma cell lines. To further characterize melanoma, we tested responsiveness to human growth hormone (GH). GH treatment resulted in GHR signaling and increased invasion and migration, which was inhibited by a GHR monoclonal antibody (mAb) antagonist in WM35, SK-MEL 5, SK-MEL 28 and SK-MEL 119 cell lines. We also detected GH in the conditioned medium (CM) of human melanoma cell lines. GHR, JAK2 and STAT5 were basally phosphorylated in these cell lines, consistent with autocrine/paracrine GH production. Together, our results suggest that melanomas are enriched in GHR and produce GH that acts in an autocrine/paracrine manner. We suggest that GHR may constitute a therapeutic target in melanoma.
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