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Immunofluorescence Analysis by Confocal Microscopy for Detecting Endogenous FOXO

Francisco Castillo1, Thomas A Mackenzie2, Bastien Cautain3

  • 1Peptomyc S.L. CELLEX/Vall d'Hebron Institute of Oncology, Carrer de Natzaret, 115, Barcelona, Spain.

Methods in Molecular Biology (Clifton, N.J.)
|November 11, 2018
PubMed

Insights

Abnormal cellular location of Forkhead box O (FOXO) proteins is linked to cancer and other diseases. This study presents a confocal microscopy method to detect FOXO expression, location, and activity, aiding cancer research.

Area of Science:

  • Cellular Biology
  • Molecular Oncology
  • Biochemistry

Background:

  • Aberrant subcellular localization of tumor suppressor proteins, including Forkhead box O (FOXO) proteins, is a hallmark of cancer.
  • Altered FOXO localization is implicated in tumor development, progression, and therapeutic resistance.
  • FOXO protein mislocalization is also associated with diabetic complications and organismal longevity.

Purpose of the Study:

  • To describe a method for the immunodetection of endogenous FOXO proteins.
  • To establish confocal microscopy as a tool for quantifying FOXO expression levels and cellular localization.
  • To enable the assessment of FOXO active/inactive forms using specific antibodies.

Main Methods:

  • Immunodetection of endogenous FOXO proteins.
  • Confocal microscopy for subcellular localization analysis.
  • Quantitative analysis of FOXO expression levels.

Main Results:

  • The described method allows for the precise quantification of FOXO expression.
  • Cellular localization of FOXO proteins can be accurately determined.
  • The technique facilitates the differentiation between active and inactive FOXO forms.

Conclusions:

  • Confocal microscopy-based immunodetection is a valuable chemical tool for studying FOXO proteins.
  • This method aids in understanding the role of FOXO in cancer and other diseases.
  • The technique can serve as a biomarker for disease states and biological processes.
Keywords:
BiomarkerConfocal microscopyFOXO proteinsImmunodetectionNuclear translocation

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