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Santoriello, C.* ; Gennaro, E.* ; Anelli, V.* ; Distel, M. ; Kelly, A.* ; Köster, R.W. ; Hurlstone, A.* ; Mione, M.*

Kita driven expression of oncogenic HRAS leads to early onset and highly penetrant melanoma in zebrafish.

PLoS ONE 5, 1-11:e15170 (2010)
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Melanoma is the most aggressive and lethal form of skin cancer. Because of the increasing incidence and high lethality of melanoma, animal models for continuously observing melanoma formation and progression as well as for testing pharmacological agents are needed. Using the combinatorial Gal4-UAS system, we have developed a zebrafish transgenic line that expresses oncogenic HRAS under the kita promoter. Already at 3 days transgenic kita-GFP-RAS larvae show a hyper-pigmentation phenotype as earliest evidence of abnormal melanocyte growth. By 2-4 weeks, masses of transformed melanocytes form in the tail stalk of the majority of kita-GFP-RAS transgenic fish. The adult tumors evident between 1-3 months of age faithfully reproduce the immunological, histological and molecular phenotypes of human melanoma, but on a condensed time-line. Furthermore, they show transplantability, dependence on mitfa expression and do not require additional mutations in tumor suppressors. In contrast to kita expressing melanocyte progenitors that efficiently develop melanoma, mitfa expressing progenitors in a second Gal4-driver line were 4 times less efficient in developing melanoma during the three months observation period. This indicates that zebrafish kita promoter is a powerful tool for driving oncogene expression in the right cells and at the right level to induce early onset melanoma in the presence of tumor suppressors. Thus our zebrafish model provides a link between kita expressing melanocyte progenitors and melanoma and offers the advantage of a larval phenotype suitable for large scale drug and genetic modifier screens.
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Publication type Article: Journal article
Document type Scientific Article
Keywords NERVE SHEATH TUMORS; MALIGNANT-MELANOMA; GENE-EXPRESSION; BRAF MUTATIONS; SELF-RENEWAL; STEM-CELLS; CANCER; PROTEIN; MODEL; NEVI
Language english
Publication Year 2010
HGF-reported in Year 2010
ISSN (print) / ISBN 1932-6203
Journal PLoS ONE
Quellenangaben Volume: 5, Issue: 12, Pages: 1-11, Article Number: e15170 Supplement: ,
Publisher Public Library of Science (PLoS)
Publishing Place Lawrence, Kan.
Reviewing status Peer reviewed
PSP Element(s) G-550200-001
Scopus ID 78650748163
Erfassungsdatum 2010-12-17