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Mmp1 and Mmp2 cooperatively induce Drosophila fat body cell dissociation with distinct roles

Qiangqiang Jia1, Yang Liu1, Hanhan Liu1

  • 1Key Laboratory of Insect Developmental and Evolutionary Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China.

Scientific Reports
|December 19, 2014
PubMed

Insights

Two matrix metalloproteinases (MMPs), Mmp1 and Mmp2, are crucial for fat body cell dissociation during Drosophila metamorphosis. They cooperatively break down cell junctions and the basement membrane, enabling tissue remodeling.

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Biochemistry

Background:

  • During Drosophila metamorphosis, fat body tissues undergo significant remodeling, transitioning from a single-cell layer to individual cells.
  • Understanding the molecular mechanisms driving this tissue dissociation is key to comprehending developmental processes.

Purpose of the Study:

  • To identify the specific genes and proteins involved in fat body cell dissociation during Drosophila metamorphosis.
  • To elucidate the distinct and cooperative roles of identified factors in tissue remodeling.

Main Methods:

  • Conducted a fat body-specific RNAi screen in Drosophila.
  • Performed cellular, biochemical, molecular, and genetic experiments to analyze gene function.
  • Investigated genetic interactions between identified genes.

Main Results:

  • Identified two matrix metalloproteinases (MMPs), Mmp1 and Mmp2, as essential for fat body cell dissociation.
  • Mmp1 was found to cleave cell-cell junctions (DE-cadherin), while Mmp2 degraded basement membrane components.
  • Genetic interaction studies confirmed the cooperative roles of Mmp1 and Mmp2 in this process.

Conclusions:

  • Mmp1 and Mmp2 act in a cooperative yet distinct manner to induce fat body cell dissociation during Drosophila metamorphosis.
  • These MMPs play critical roles in tissue remodeling by dismantling cell-cell and cell-basement membrane interactions.
  • The findings offer insights into the broader mechanisms of MMP-mediated tissue remodeling in animals.

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