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Impact of Triton X-100 on Notch 1 Surface Receptor Immunofluorescence: A Cautionary Study

Maha Shahid1, Kanwal Iftikhar1, Shabana Usman Simjee1,2

  • 1Hussain Ebrahim Jamal Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.

Discoveries (Craiova, Romania)
|May 12, 2025
PubMed

Insights

Triton X-100, a common surfactant, causes false protein expression in cell surface receptor studies by disrupting cell membranes. Avoiding this agent ensures accurate analysis of proteins like Notch 1 via immunofluorescence.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Immunology

Background:

  • Triton X-100 is a widely used cell-permeabilizing agent in molecular studies.
  • This surfactant can disrupt cell surface receptors, compromising studies focused on them.
  • Accurate analysis of surface receptor protein expression is crucial for understanding cellular processes.

Purpose of the Study:

  • To investigate the impact of Triton X-100 on the protein expression analysis of the Notch surface receptor.
  • To determine if Triton X-100 causes artifactual results in surface receptor studies.
  • To establish a reliable method for analyzing surface receptor protein expression using immunofluorescence.

Main Methods:

  • Cultured cortical cells were treated with Triton X-100.
  • Protein expression of the Notch receptor was analyzed in cells with and without Triton X-100 exposure.
  • Immunofluorescence was employed to detect and quantify Notch 1 receptor presence.

Main Results:

  • Triton X-100 treatment led to false protein expression of Notch receptors due to cellular membrane disruption.
  • Cells not treated with the surfactant showed fluorescence levels proportional to the actual presence of Notch 1 receptors.
  • The study identified Triton X-100 as a confounding factor in surface receptor quantification.

Conclusions:

  • Triton X-100 is unsuitable for studies involving cell surface receptors due to its detrimental effects on membrane integrity.
  • Excluding Triton X-100 from the experimental protocol ensures accurate assessment of surface receptor protein expression.
  • The described immunofluorescence method, without surfactant, is recommended for reliable analysis of any surface receptor protein.
Keywords:
Cell permeabilityCortexImmunocytochemistryNotch 1 receptorPrimary cultureTriton X-100.

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