AMSBIO have supplied custom lentivectors to Francesco Pampaloni and his team (Lotta Hof, Till Moreth, Michael Koch) at the Buchmann Institute for Molecular Life Sciences (BMLS) in Frankfurt, Germany allowing them to visualize cell nuclei and F-actin cytoskeleton in their organoids, as published in BMC Biology.
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Michael Koch, has commented:
As epithelial organoids have a stem cell-like character, which makes them difficult to transduce, they require optimised transduction protocols. AMSBIO custom high-titre lentiviral particles offered us an ideal solution to this issue. By labelling epithelial organoids with H2B-eGFP and LifeAct-mCherry using AMSBIO lentivectors/lentiviral particles, we were able to study dynamic cellular processes in organoid development (by light sheet microscopy/LSFM) over several days with a stable fluorescence signal.
These custom lentivectors enabled us to gain intricate insights into highly dynamic processes in epithelial organoid development like formation, polarisation, and luminal expansion. Throughout our research, AMSBIO offered great support through discussing possible options in vector design for optimal delivery and expression of our organoids. We highly recommend AMSBIO custom lentivirus for fluorescently labelling demanding/delicate cells in long-term live microscopy studies and would not hesitate to use their service again.
Using Lentivectors to Label Organoids
AMSBIO’s lentiviral system is a novel gene delivery tool using lentivectors for gene expression or knockdown. Lentivirus can effectively transduce both dividing and non-dividing mammalian cells, and integrate into the host genome, allowing stable long-term, high-level gene expression both in vivo and in vitro. Unlike traditional retroviral system, the AMSBIO lentivirus is much more actively imported into the nuclei of non-dividing cells and stably integrated into the host cell’s genome independent of cell cycle. Offering full customization, including choice of promoter, marker, tags, number of ORFs expressed and titer and amount of lentivirus, AMSBIO can meet all your custom lentivirus needs.
Dr Maja Petkovic – a business unit manager at AMSBIO commented “We were delighted to be selected by the BMLS researchers to supply lentivirus expressing fluorescent fusion proteins H2B-eGFP to visualise cell nuclei and LifeAct-mCherry to visualise the F-actin cytoskeleton thereby enabling them to track the cellular dynamics of their organoid development”. She added “Our lentiviral vectors are valuable gene delivery tools. We can offer a custom service to make ready-to-use constitutive or inducible over-expression lentivirus for any specific gene. We will sub-clone your selected genes into our lentivirus expression vectors and produce expression lentivirus for each gene”.
Hof, L., Moreth, T., Koch, M., Liebisch, T., Kurtz, M., Tarnick, J., … & Pampaloni, F. (2021). Long-term live imaging and multiscale analysis identify heterogeneity and core principles of epithelial organoid morphogenesis. BMC biology, 19(1), 1-22.