Tissue design: how Drosophila tumors remodel their neighborhood
Parthive H Patel1, Bruce A Edgar1
1German Cancer Research Center (DKFZ) and Center for Molecular Biology Heidelberg (ZMBH) Alliance, Im Neuenheimer Feld 282, D-69120 Heidelberg, Germany.
Abstract:
Drosophila genetics has long been appreciated as a powerful approach for discovering the normal functions of genes that act as oncogenes and tumor suppressors in human cancer. Recent studies have also highlighted its advantages for deciphering how such genes function during tumorigenesis itself. Here we detail studies relating to how tumors, generated in developing organs and adult stem cell-based tissues, remodel the tissue landscape to their benefit. Like mammalian tumors, insect tumors can dissolve extracellular matrix, recruit blood cells, migrate and invade other tissues. While much is known about how mammalian fibroblasts, immune cells and vasculature promote late tumorigenesis, less is understood about the very earliest stages of tumor development in mammals. Because Drosophila has fewer mitotic cells and a simpler tissue architecture, it affords easy detection and analysis of early clonal tumor growth. Drosophila studies have revealed both cooperative and competitive interactions between tumor and normal cells during early tumor growth. During development, these interactions typically occur with other proliferative progenitor cells, but in adult stem cell-based tissues, the stem cell niche can fuel tumor growth.
Insights
Drosophila studies reveal how early tumors remodel tissues by dissolving extracellular matrix and interacting with normal cells. This research offers insights into cancer development, particularly in adult stem cell niches.
Area of Science:
- * Utilizes Drosophila melanogaster as a model organism for cancer research.
- * Focuses on gene function in oncogenesis and tumor suppression.
Background:
- * Drosophila genetics is crucial for understanding human cancer genes.
- * Recent work highlights its utility in studying tumorigenesis mechanisms.
- * Tumor-host interactions in early cancer development are not well understood in mammals.
Purpose of the Study:
- * To detail studies on how tumors remodel tissue landscapes for their benefit.
- * To analyze early clonal tumor growth using Drosophila's simpler biological system.
- * To explore interactions between tumor and normal cells during early tumorigenesis.
Main Methods:
- * Analysis of tumors in developing organs and adult stem cell tissues in Drosophila.
- * Observation of tumor cell behaviors like extracellular matrix dissolution, cell recruitment, migration, and invasion.
- * Detection and analysis of early clonal tumor growth in a simplified tissue architecture.
Main Results:
- * Drosophila tumors exhibit behaviors similar to mammalian tumors, including matrix degradation and cell invasion.
- * Early tumor growth involves cooperative and competitive interactions with normal cells.
- * The stem cell niche in adult tissues can promote tumor progression.
Conclusions:
- * Drosophila provides a powerful model for dissecting early tumorigenesis and tumor-host interactions.
- * Understanding these early interactions is key to deciphering cancer development.
- * Stem cell niches play a significant role in fueling tumor growth.
