TY - JOUR
T1 - Bis-anthracycline WP760 abrogates melanoma cell growth by transcription inhibition, p53 activation and IGF1R downregulation
AU - Olbryt, Magdalena
AU - Rusin, Aleksandra
AU - Fokt, Izabela
AU - Habryka, Anna
AU - Tudrej, Patrycja
AU - Student, Sebastian
AU - Sochanik, Aleksander
AU - Zieliński, Rafał
AU - Priebe, Waldemar
N1 - Funding Information:
Funding This study was supported: by grant No. 862 N–CTCB/2010/0 from Ministry of Science and Higher Education, Poland; in part by the University Cancer Foundation via the Sister Institution Network Fund at the UT MD Anderson Cancer Center and by the UT MD Anderson Cancer Center SPORE in Melanoma (P50 CA093459) funded from the NCI.
Funding Information:
Acknowledgements The Authors acknowledge financial support from the Association for the Support of Cancer Research (Gliwice, Poland) and thank Dr. Marek Rusin for providing antibodies and helpful discussion; Dr. Magdalena Głowala-Kosińska for assistance with flow cytometric studies.
Publisher Copyright:
© 2017, The Author(s).
PY - 2017/10/1
Y1 - 2017/10/1
N2 - Anthracycline chemotherapeutics, e.g. doxorubicin and daunorubicin, are active against a broad spectrum of cancers. Their cytotoxicity is mainly attributed to DNA intercalation, interference with topoisomerase activity, and induction of double-stranded DNA breaks. Since modification of anthracyclines can profoundly affect their pharmacological properties we attempted to elucidate the mechanism of action, and identify possible molecular targets, of bis-anthracycline WP760 which previously demonstrated anti-melanoma activity at low nanomolar concentrations. We studied the effect of WP760 on several human melanoma cell lines derived from tumors in various development stages and having different genetic backgrounds. WP760 inhibited cell proliferation (IC50 = 1–99 nM), impaired clonogenic cell survival (100 nM), and inhibited spheroid growth (≥300 nM). WP760 did not induce double-stranded DNA breaks but strongly inhibited global transcription. Moreover, WP760 caused nucleolar stress and led to activation of the p53 pathway. PCR array analysis showed that WP760 suppressed transcription of ten genes (ABCC1, MTOR, IGF1R, EGFR, GRB2, PRKCA, PRKCE, HDAC4, TXNRD1, AKT1) associated with, inter alia, cytoprotective mechanisms initiated in cancer cells during chemotherapy. Furthermore, WP760 downregulated IGF1R and upregulated PLK2 expression in most of the tested melanoma cell lines. These results suggest that WP760 exerts anti-melanoma activity by targeting global transcription and activation of the p53 pathway and could become suitable as an effective therapeutic agent.
AB - Anthracycline chemotherapeutics, e.g. doxorubicin and daunorubicin, are active against a broad spectrum of cancers. Their cytotoxicity is mainly attributed to DNA intercalation, interference with topoisomerase activity, and induction of double-stranded DNA breaks. Since modification of anthracyclines can profoundly affect their pharmacological properties we attempted to elucidate the mechanism of action, and identify possible molecular targets, of bis-anthracycline WP760 which previously demonstrated anti-melanoma activity at low nanomolar concentrations. We studied the effect of WP760 on several human melanoma cell lines derived from tumors in various development stages and having different genetic backgrounds. WP760 inhibited cell proliferation (IC50 = 1–99 nM), impaired clonogenic cell survival (100 nM), and inhibited spheroid growth (≥300 nM). WP760 did not induce double-stranded DNA breaks but strongly inhibited global transcription. Moreover, WP760 caused nucleolar stress and led to activation of the p53 pathway. PCR array analysis showed that WP760 suppressed transcription of ten genes (ABCC1, MTOR, IGF1R, EGFR, GRB2, PRKCA, PRKCE, HDAC4, TXNRD1, AKT1) associated with, inter alia, cytoprotective mechanisms initiated in cancer cells during chemotherapy. Furthermore, WP760 downregulated IGF1R and upregulated PLK2 expression in most of the tested melanoma cell lines. These results suggest that WP760 exerts anti-melanoma activity by targeting global transcription and activation of the p53 pathway and could become suitable as an effective therapeutic agent.
KW - Anthracyclines
KW - Melanoma
KW - Transcriptional inhibitor
KW - WP760
KW - p53
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U2 - 10.1007/s10637-017-0465-9
DO - 10.1007/s10637-017-0465-9
M3 - Article
C2 - 28417283
AN - SCOPUS:85017515667
SN - 0167-6997
VL - 35
SP - 545
EP - 555
JO - Investigational New Drugs
JF - Investigational New Drugs
IS - 5
ER -