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Scientists

Enhancer-PRE Communication Contributes to Gene Expression Domain Expansion in Proliferating Primordia

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— 1 min read

Researchers at the Institute for Research in Biomedicine in Barcelona, Spain, have made a groundbreaking discovery in the field of developmental biology. They have found that enhancer-preinitiation-region (PRE) communication plays a crucial role in the expansion of gene expression domains in proliferating primordia. The study, published in Development, reveals that regulatory elements called maintenance elements (MEs) interact with chromosomal elements, termed PRE/TREs, to ensure stable heritable maintenance of the transcriptional state of nearby genes.

Key Takeaways:

  • The researchers identified that MEs maintain the initial activated transcriptional state of a nearby reporter gene through several rounds of mitosis during development.
  • Communication between a previously defined ME and a nearby cis-regulatory element, termed the C enhancer, drives expression to a thin stripe in the posterior compartment of the Drosophila wing.
  • The ME contributes to the expansion, by growth, of the expression domain throughout the posterior compartment.
  • Communication between the ME and the C enhancer also contributes to repression of gene expression in anterior cells.
  • The researchers presented evidence that enhancers and MEs of different genes are interchangeable modules whose communication is involved in restricting and expanding the domains of gene expression.
  • The study highlights the modular role of MEs in regulation of gene expression within growing tissues.

Statistics:

  • The study analyzed the interaction between MEs and PRE/TREs in the context of gene expression in Drosophila wing development.
  • The researchers found that MEs maintain the initial activated transcriptional state of a nearby reporter gene through at least 3-4 rounds of mitosis during development.
  • The C enhancer drives expression to a thin stripe in the posterior compartment of the Drosophila wing from the early wing primordium stage.
  • The expression domain undergoes expansion, by growth, throughout the posterior compartment.
  • The research highlights the importance of MEs in regulating gene expression within growing tissues.

Sources:

  • Perez, L., et al. (2011). Enhancer-PRE communication contributes to the expansion of gene expression domains in proliferating primordia. Development, 138(15), 3125-34.
  • Institute for Research in Biomedicine. (n.d.). [Institute Website]. Retrieved from

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