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Updated: May 9, 2026

Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding
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Simulating Crowding In Vitro: Not an Elusive Goal Any Longer.

Piero Andrea Temussi1, Matteo Levantino2

  • 1Dipartimento di Scienze Chimiche, University "Federico II" of Naples, Naples, Italy. temussi@unina.it.

Sub-Cellular Biochemistry
|September 26, 2025
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Cellular crowding significantly impacts protein stability and function. Understanding these effects is crucial for accurate in vivo biophysical studies, especially for marginally stable proteins.

Keywords:
ConfinementMethodologiesMolecular crowdingSynchrotron

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Area of Science:

  • Biophysics
  • Cellular Biology
  • Protein Science

Background:

  • In vitro protein studies often use dilute solutions, unlike crowded in vivo conditions.
  • Macromolecular crowding influences protein stability and reaction kinetics.
  • Theoretical estimates suggest crowding increases unfolding temperatures by 5–20°C.

Purpose of the Study:

  • Critically examine techniques for studying proteins in crowded environments.
  • Evaluate the impact of macromolecular crowding on protein stability.
  • Assess the suitability of different crowder types.

Main Methods:

  • Review of experimental methodologies for protein studies under crowding.
  • Analysis of synthetic polymers and protein-based crowders.
  • Focus on observing marginally stable proteins.

Main Results:

  • Crowding significantly affects protein stability and behavior.
  • Choice of crowder (synthetic vs. protein) is critical.
  • Marginally stable proteins offer valuable insights in crowded solutions.

Conclusions:

  • Studying proteins in crowded solutions provides more biologically relevant data.
  • Careful selection of crowders is essential for accurate results.
  • Further research on protein behavior in crowded environments is warranted.