Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster

Epigenetic regulators are emerging as cooperating factors that promote the activity of oncogenes in tumorigenesis and metastasis. In this study, we screened 19 epigenetic regulators in Polycomb group genes, Trithorax group genes, other related histone modifiers and chromatin remodeling complexes for...

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Main Author: Qi, Le
Other Authors: Hector Herranz
Format: Final Year Project
Language:English
Published: 2013
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Online Access:http://hdl.handle.net/10356/54638
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-546382023-02-28T18:07:25Z Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster Qi, Le Hector Herranz School of Biological Sciences A*STAR Institute of Molecular and Cell Biology Stephen M. Cohen DRNTU::Science::Biological sciences::Genetics Epigenetic regulators are emerging as cooperating factors that promote the activity of oncogenes in tumorigenesis and metastasis. In this study, we screened 19 epigenetic regulators in Polycomb group genes, Trithorax group genes, other related histone modifiers and chromatin remodeling complexes for oncogenic cooperation with known oncogene Yorkie and Notch using Drosophila TARGET system in wing imaginal discs. We identified potential genetic interaction between Snr1 and Yorkie, where Snr1 knockdown significantly promotes Yorkie-induced overgrowth, resulting in complete loss of apico-basal polarity and formation of metastasis. Snr1 potentially balances between Hippo pathway and other proliferation signals, whereas Yorkie over-expression disrupts such balance and causes neoplasia in Snr1 knockdown constructs. On the other hand, Snr1 knockdown inhibited Notch-induced hyperplasia, indicating context-specificity of Snr1 in tumorigenesis. Finally, Caf1 was shown to be essential for both Yorkie- and Notch-driven overgrowth in wing discs. Caf1 knockdown lead to significantly elevated level of wingless and down-regulation of dMyc, antagonizing Yorkie and Notch target gene activation. These results provided new insights into understanding of mechanisms underlying Yorkie- and Notch-driven tumorigenesis, their complex interaction with epigenetic regulators and revealed potential specific therapeutic targets in cancer treatment. Bachelor of Science in Biological Sciences 2013-07-01T02:41:23Z 2013-07-01T02:41:23Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/54638 en Nanyang Technological University 39 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Biological sciences::Genetics
spellingShingle DRNTU::Science::Biological sciences::Genetics
Qi, Le
Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
description Epigenetic regulators are emerging as cooperating factors that promote the activity of oncogenes in tumorigenesis and metastasis. In this study, we screened 19 epigenetic regulators in Polycomb group genes, Trithorax group genes, other related histone modifiers and chromatin remodeling complexes for oncogenic cooperation with known oncogene Yorkie and Notch using Drosophila TARGET system in wing imaginal discs. We identified potential genetic interaction between Snr1 and Yorkie, where Snr1 knockdown significantly promotes Yorkie-induced overgrowth, resulting in complete loss of apico-basal polarity and formation of metastasis. Snr1 potentially balances between Hippo pathway and other proliferation signals, whereas Yorkie over-expression disrupts such balance and causes neoplasia in Snr1 knockdown constructs. On the other hand, Snr1 knockdown inhibited Notch-induced hyperplasia, indicating context-specificity of Snr1 in tumorigenesis. Finally, Caf1 was shown to be essential for both Yorkie- and Notch-driven overgrowth in wing discs. Caf1 knockdown lead to significantly elevated level of wingless and down-regulation of dMyc, antagonizing Yorkie and Notch target gene activation. These results provided new insights into understanding of mechanisms underlying Yorkie- and Notch-driven tumorigenesis, their complex interaction with epigenetic regulators and revealed potential specific therapeutic targets in cancer treatment.
author2 Hector Herranz
author_facet Hector Herranz
Qi, Le
format Final Year Project
author Qi, Le
author_sort Qi, Le
title Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
title_short Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
title_full Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
title_fullStr Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
title_full_unstemmed Identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
title_sort identification of epigenetic regulators cooperating with oncogene yorkie and notch in promoting tumorigenesis and metastasis in drosophila melanogaster
publishDate 2013
url http://hdl.handle.net/10356/54638
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