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Updated: Jul 11, 2025

A Protocol for Genetic Induction and Visualization of Benign and Invasive Tumors in Cephalic Complexes of Drosophila melanogaster
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A Protocol for Genetic Induction and Visualization of Benign and Invasive Tumors in Cephalic Complexes of Drosophila melanogaster

Published on: September 11, 2013

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Spt5 interacts genetically with Myc and is limiting for brain tumor growth in Drosophila

Julia Hofstetter1, Ayoola Ogunleye2, André Kutschke1

  • 1Cancer Systems Biology Group, Theodor Boveri Institute, Biocenter, University of Würzburg, Würzburg, Germany.

Life Science Alliance
|November 7, 2023
PubMed

Insights

The transcription factor SPT5 synergizes with MYC oncoproteins. In Drosophila, SPT5 knockdown shrinks tumors and extends lifespan, suggesting SPT5 as a potential cancer drug target.

Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Oncology

Background:

  • The transcription factor SPT5 interacts with MYC oncoproteins, crucial for MYC target gene activation in cell cultures.
  • Understanding the in vivo relevance of the SPT5-MYC interaction is essential for comprehending MYC-driven pathologies.

Purpose of the Study:

  • To investigate the physiological role of SPT5 in conjunction with MYC in a living organism, specifically Drosophila.
  • To evaluate the therapeutic potential of targeting SPT5 in MYC-driven cancers.

Main Methods:

  • Utilized Drosophila melanogaster as a model organism.
  • Performed Spt5 knockdown experiments in conjunction with Myc overexpression in imaginal disc cells and larval neuroblasts.
  • Assessed effects on cell proliferation, developmental defects, tumor volume, and animal survival.

Main Results:

  • Spt5 showed moderate synergy with Myc in proliferating imaginal disc cells.
  • Spt5 knockdown exacerbated Myc-induced eye defects.
  • Spt5 knockdown significantly reduced tumor volume and extended survival in tumor-bearing flies.
  • The anti-tumor effect of Spt5 knockdown persisted even when initiated systemically and after tumor formation.

Conclusions:

  • SPT5 plays a critical role in supporting MYC function in vivo, particularly in promoting proliferation and tumor growth.
  • Targeting SPT5 demonstrates significant anti-tumor efficacy in a Drosophila model.
  • SPT5 represents a promising therapeutic target for human oncology, especially for MYC-driven cancers.

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