Products under consideration LentiGlo TM – ready to use lentiviruses co-expressing a novel...
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Transcript of Products under consideration LentiGlo TM – ready to use lentiviruses co-expressing a novel...
Products under consideration
• LentiGloTM – ready to use lentiviruses co-expressing a novel luciferase along with the flourescent protein
• Bioluminescent stem cells – adult human mesenchymal stem cells engineered to express a novel luciferase along with the fluorescent protein
Applications:• Study stem cell growth, survival, and differentiation in
vitro and in vivo
Overview of presentation
Novel luciferase reporters
Lenti-luciferases (LentiGloTM)
Stable co-expression of different luciferases and fluorescent proteins in human adult stem cells using ready to use lentivirus (LentiGloTM) vectors
In vivo imaging to track stem cell growth and survival
Profect protein delivery technology to effect directed
differentiation of stem cells into specific lineages
Targeting Systems IP review
LUCIFERASE SUBSTRATE
Gaussia luciferase CoelenterazineRenilla luciferase CoelenterazineRed Luciola luciferase Firefly luciferinCypridina luciferase Cypridina luciferin
(Vargulin )
Substrate specificities of different luciferases
Dual luciferase assays
Vargula (463nm) and Red Italica (613nm)
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Red Italica(613nm)
A Triple Luciferase assay based on Cyridina, Green Renilla, and Red Luciola luciferases
Vargula (463nm), Green Renilla (527nm) and Red Italica (613nm)
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Green Renilla (527nm)
Red Italica (613nm)
Vargula (463nm)
Secreted luciferase reporters enable non-invasive
analysis of cell growth, survival and in vivo imaging by
sample blood or urine
LentiGloTM
vectors contain novel , bright luciferases
increasing sensitivity
Available of several Lenti-luciferase products expressing
luciferases emitting at different wavelengths and
utilizing different luciferin substrates allows for efficient
multiplexing options such as tracking different types of
stem cells in the same animal
Why LentiGloTM?
LentiGloTM vectors that enable tracking stem cells, assessing stem cell growth and survival in vivo and also facilitate studies on stem cell differentiation or gene silencing in vivo.
Lenti-UBC-RedFluc-GFPLenti-UBC-GrFluc-RFPLenti-UBC-GrRenLuc-RFPLenti-UBC-GLuc-RFPLenti-UBC-CypLuc-RFPLenti-NFkB-GrRenLuc-RFPLenti-NFkB-GLuc-RFP
LentiGloTM Stem Track
Collection
LentiGloTM Lentiviral Vectors
– LentiGloTM Gluc-GFP: A lentiviral vector expressing gaussia luciferase under control of the CMV promoter and a green fluorescent protein under an IRES
– Choice of CMV or UbC promoter
– Choice of Gluc, RenLuc, GrFLuc, RedFLuc or VargLuc
LentiGloTM: The power of lentiviral delivery with novel luciferases
Panel of novel luciferase reporters – The brightest and the best
Human mesenchymal stem cells transduced with
a LentiGloTM vector expressing Gluc and GFP
StemTrackTM- Stem cells transduced to co-express a novel luciferase along with a fluorescent protein
StemTrackTM
Human stem cells expressing bioluminescent genes
Primary human bone marrow-derived mesenchymal stem cells transduced
with LentiGloTM Gluc-GFP
Gaussia luciferase as an in vivo reporter to monitor cell survival or gene expression in vivo
1 day Post- 4 days Pos-implantation implantation
Data using primary Ad HMSCs transduced with LentiGlo vector expressing Gluc- GFP and subcutaneously implanted into mice
Use of LentiGloTM (expressing red firefly luciferase) for imaging human stem cells
One million such cells expressing a different luciferase, the red Italica (firefly) luciferase were implanted into the transverse processes in nude mice. After 2 weeks, mice were injected with luciferin intraperitoneally and imaged using a CCD camera. Even though only 500,000 stem cells were implanted a robust signal was observed
Non-invasive, quantitative measurement of stem cell growth in vivo by measurement of Gluc activity in blood
One millions stem cells expressing Gluc and GFP or PBS control were injected intravenously in nude mice. Prior to injection, the Gluc activity was monitored. The Gluc level in blood indicated that a significant number of cells survived the injection and did not proliferate
Efficient protein delivery into stem cells enables novel approaches for stem cell differentiation:
Targeted nuclear delivery of transcription factors to mediate differentiation of adult human stem cells into specific lineages
Protein delivery to mediate expansion of human adult stem cells (Tanaka et al, Stem Cells paper)
Protein Delivery
Proprietary technology for highly efficient delivery of functionally active proteins and peptides into human and animal stem cells
Does not result in permanent genetic modification of cellsSuccessful ex-vivo expansion of CD34 positive hematopoietic stem cells has been recently been demonstratedDoes not require covalent modification of protein to be delivered
Shown to be applicable for expansion of hematopoietic stem cells (see stem cell paper in list of 11 citations using Profect). This technology does not involve covalent modification of the protein being delivered and has been used to deliver one or several proteins, peptides, transcription factors, enzymes, antibodies etc to the cytoplasm or nucleus of the cell
Proprietary technology
Profect-P1: A lipid reagent that forms a non-covalent complex with proteins
Profect-P2: A non-lipid reagent that forms non-covalent complexes with proteins and enables protein transport across both the cell membrane and the nuclear membrane.
Protein delivery reagents
An important tool in stem cell research and therapeutics
Applications:
Delivery of transcription factors to mediate differentiation of adult stem cells into specific lineages
Expansion of stem cells
Delivery of bioluminescent (chemiluminescent proteins) to track implanted stem cells
Directed Protein Delivery
ProfectTM
Optimized for protein delivery into stem cells
Mesenchymal Stem Cells transfected with Pluriport showing Histone and Dapi imaged at 20X magnification
Efficient protein delivery into adult human stem cells
Antibody delivery into the nucleus of Cos-7 cells using Profect P-2
Antibody Delivery
Cos-7 cells were transfected with Alexa 594 conjugated IgG and Alexa 488 conjugated histone using the Profect P-2 reagent.
LentiGloTM Stem Cells
Myogenic pics of pCMV-Gluc-GFP transduced adipose derivered mesenchymal stem cells treated with myogenic treatment
Cardiomyocyte-like pics of pCMV-Gluc-GFP transduced adipose derivered mesenchymal stem cells treated with myogenic treatment
Control – untreated. Ad-HMSCs transduced with pCMV-Gluc-GFP lenti without further treatment
OsteogenicTowards osteocytes?
Differentiation of Ad-HMScs into islet cells
Differentiation of adipose tissue -derived mesenchymal stem cells into pancreatic Beta cells (top panel) Bottom panel (negative control). Staining for insulin C peptide, an islet sp marker
Differentiation of Ad-HMSCs into skeletal muscle cells
Cells were stained with antibodies to skeletal muscle troponin T, a marker for skeletal muscle cells