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This study demonstrates simultaneous imaging of nine fluorescent proteins using advanced microscopy. This technique enables detailed visualization of virus entry and cellular processes in living cells.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Microscopy

Background:

  • Multicolor imaging with genetically encodable fluorescent proteins is crucial for live cell studies.
  • Simultaneous visualization of multiple cellular components and biological processes remains a challenge.

Purpose of the Study:

  • To demonstrate simultaneous imaging of nine fluorescent proteins in a single acquisition.
  • To visualize the process of human immunodeficiency virus entry into host cells.
  • To showcase the potential for advanced multicolor live cell imaging.

Main Methods:

  • Utilizing fluorescence lifetime imaging microscopy (FLIM).
  • Employing pulsed interleaved excitation with three laser lines.
  • Combining FLIM with genetically encodable fluorescent proteins for multicolor imaging.

Main Results:

  • Successfully demonstrated simultaneous imaging of nine fluorescent proteins.
  • Visualized quadruple-labeled human immunodeficiency viruses on host cells.
  • Enabled simultaneous visualization of sub-cellular organelles (mitochondria, cytoskeleton, nucleus) during virus entry.

Conclusions:

  • Multicolor fluorescence lifetime imaging offers a powerful strategy for spatio-temporal live cell imaging.
  • This technique significantly advances the ability to study complex biological processes like viral infection.
  • The method has the potential to image up to nine spectral channels in living cells, opening new avenues in biological research.