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Cell Specific Gene Expression01:58

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells
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Gene Expression in on-Chip Membrane-Bound Artificial Cells.

Ziane Izri1, David Garenne2, Vincent Noireaux2

  • 1Department of Physics , Kyushu University , Fukuoka , 819-0395 , Japan.

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|July 4, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed artificial cells using microfluidics and cell-free transcription-translation (TXTL). These artificial cells, enclosed by phospholipid membranes, successfully produced proteins, highlighting the membrane

Keywords:
cell-free transcription−translationmicrofluidicspassive trans-membrane transport

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Materials Science

Background:

  • Artificial cells are emerging as platforms for studying living systems.
  • Cell-free transcription-translation (TXTL) enables bottom-up synthesis of cellular reactors.
  • Scaling up TXTL designs in defined geometries is challenging.

Purpose of the Study:

  • To present a microfluidic device for scalable TXTL reactions within artificial cells.
  • To investigate nutrient transport across phospholipid membranes in picoliter reactors.
  • To assess the role of the membrane in artificial cell efficiency.

Main Methods:

  • A microfluidic device with thousands of microwells was fabricated.
  • TXTL reactions for a reporter gene were conducted within the microwells.
  • Phospholipid membranes separated microwells from an external buffer containing nutrients.

Main Results:

  • Microreactors remained stable for over 24 hours with nutrient supply.
  • Protein yields reached a few mg/mL.
  • Passive nutrient transport across the membrane was crucial for efficient TXTL, with inert solutions reducing yield.

Conclusions:

  • The microfluidic device enables scalable synthesis of artificial cells.
  • Phospholipid membranes are critical for efficient nutrient uptake and protein production in cell-free TXTL systems.
  • This work advances the design of artificial cells for biological research and applications.