Biosensors

HeLa cells were transduced with LentiBrite™GFP-LC3 lentiviral particles and were either (A) left in complete media or (B) incubated in EBSS containing a lysosome inhibitor under starvation conditions. The GFP-LC3 displays a diffuse nuclear and cytosolic distribution in fed cells, and a punctate distribution in starved autophagic cells.
Biosensors can be used to detect a particular protein as well as the subcellular location of that protein within live cells. Fluorescent tags are an effective way to visualize the protein of interest within a cell by either fluorescent microscopy or time-lapse video capture. Visualizing live cells without disruption can reveal changing cellular conditions in real time.

Lentiviral vector systems are a popular tool for introducing genes and gene products into cells. Advantages over non-viral methods (such as chemical-based transfection) include higher-efficiency transfection of dividing and non-dividing cells, stable expression of the transgene, and low immunogenicity.

EMD Millipore’s new LentiBrite™ Lentiviral Biosensors, a new suite of pre-packaged lentiviral particles encoding important and foundational proteins of autophagy, apoptosis, and cell structure, enables visualization under different cell/disease states in live cell and in vitro analysis.

Features and Benefits:
Live Cell Visualization
LentiBrite™ GFP-LC3 Lentiviral Biosensor,
 Catalogue No. 17-10193

Timecourse imaging of HT-1080 cells after transduction with LentiBrite GFP-LC3 and the addition of a lysosomal inhibitor under starvation conditions. GFP-LC3 displays a diffuse nuclear and cytosolic distribution in fed cells, and a punctate distribution in starved, autophagic cells.




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LentiBrite™ EB3-GFP Lentiviral Biosensor,
 Catalogue No. 17-10208

REF52 cells were plated in a chambered coverglass and transduced with lentiviral particles. Cells were imaged live by oil immersion wide-field fluorescence microscopy. The EB3-GFP displays a punctate distribution characteristic of microtubule ends.




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LentiBrite™ RFP-EB3 Lentiviral Biosensor,
 Catalogue No. 17-10222

REF52 cells were plated in a chambered coverglass and transduced with lentiviral particles. Cells were imaged live by oil immersion wide-field fluorescence microscopy. The EB3-RFP displays a punctate distribution characteristic of microtubule ends.




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LentiBrite™ Histone H2B-RFP Lentiviral Biosensor,
 Catalogue No. 17-10228

U2OS cells were plated in chamber slides and transduced with lentiviral particles. Cells were imaged live by oil immersion wide-field fluorescence microscopy. The cell displays metaphase chromosomes (H2B-RFP) as it transitions to anaphase.




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LentiBrite™ Histone H2B-GFP Lentiviral Biosensor,
 Catalogue No. 17-10229

U2OS cells were plated in chamber slides and transduced with lentiviral particles. Cells were imaged live by oil immersion wide-field fluorescence microscopy. The cell is displaying prophase, where the chromatin (H2B-GFP) condenses into chromosomes.




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Higher Efficiency Transfection Compared to Chemical or Non-viral-based Transfection Methods
GFP-Tubulin (HUVEC)
 
Plasmid Transfection Using Lipofectamine 2000
 
LentiBrite™ GFP-Tubulin Lentiviral Biosensor Tranfection
(Catalogue No. 17-10206)
HUVECs were transfected with GFP-Tubulin plasmids using Lipofectamine 2000 (top row) or LentiBrite™ GFP-Tubulin lentiviral particles (bottom row). The nucleus is stained with DAPI (blue). The LentiBrite lentiviral transfection yields higher efficiency and more uniform expression of GFP-Tubulin versus chemical transfection.
Higher Efficiency Transfection Compared to Baculovirus
MOI = 20

LentiBrite™
 
Baculovirus Competitor Product
 
LentiBrite™ lentiviral particles encoding GFP-LC3 (Catalogue No. 17-10193) were adjusted to 1 mL, and equivalent volumes of lentivirus and baculovirus from a competitor product were added to HT1080 cells at an MOI of 20. Lentiviral transfection provides a stronger overall signal of GFP-LC3 compared to baculovirus transfection, when using equivalent amounts of each product.
Ability to Transfect Dividing, Non-dividing, and Difficult-to-transfect Cell Types
   
LentiBrite™ Paxillin-GFP (Catalogue No. 17-10154) Primary cells (Human Mesenchymal Stem Cells) were plated in chamber slides and transduced with lentiviral particles at an MOI of 5 for 24 hours.
 
LentiBrite™ RFP-Beta Actin (Catalogue No. 17-10203) Primary cells (HUVECs) were plated in chamber slides and transduced with lentiviral particles at an MOI of 40 for 24 hours.

 
LentiBrite™ GFP-Vimentin (Catalogue No. 17-10152) Primary cells (Human Mesenchymal Stem Cells) were plated in chamber slide and transduced with lentiviral particles at an MOI of 10 for 24 hours.
LentiBrite™ Lentiviral Biosensor Family
DescriptionCatalogue No.
GFP-LC317-10193
GFP-LC3 Mutant17-10189
RFP-LC317-10143
RFP-LC3 Control Mutant17-10188
Alpha-actinin-GFP17-10156
Alpha-Actinin-RFP17-10196
GFP-Beta Actin17-10204
RFP-Beta Actin17-10203
Calreticulin-RFP17-10146
PSD95-GFP17-10227
PSD95-RFP17-10226
EB3-GFP17-10208
EB3-RFP17-10222
DescriptionCatalogue No.
Histone H2B-GFP17-10229
Histone H2B-RFP17-10228
GFP-HMGB117-10147
Paxillin-GFP17-10154
Paxillin-RFP17-10155
RFP-Tubulin17-10205
GFP-Tubulin17-10206
GFP-Vimentin17-10152
RFP-Vimentin17-10153
GFP-RAD5117-10234
RFP-RAD5117-10220
GFP-Cortactin17-10219
RFP-Cortactin17-10218

More GFP- & RFP-tagged lentiviral biosensors coming soon!