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2021 - Cell engineering method using fluorogenic oligonucleotide signaling probes and flow cytometry

icon pl  Patchliner publication in Biotechnology Letters (2021)

Shekdar K., Langer J., Venkatachalan S., Schmid L., Anobile J., Shah P., Lancaster A., Babich O., Dedova O., Sawchuck D.


Biotechnology Letters (2021) doi: 10.1007/s10529-021-03101-5


Objective: Chromovert® Technology is presented as a new cell engineering technology to detect and purify living cells based on gene expression.

Methods: The technology utilizes fluorogenic oligonucleotide signaling probes and flow cytometry to detect and isolate individual living cells expressing one or more transfected or endogenously-expressed genes.

Results: Results for production of cell lines expressing a diversity of ion channel and membrane proteins are presented, including heteromultimeric epithelial sodium channel (αβγ-ENaC), sodium voltage-gated ion channel 1.7 (NaV1.7-αβ1β2), four unique γ-aminobutyric acid A (GABAA) receptor ion channel subunit combinations α1β3γ2s, α2β3γ2s, α3β3γ2s and α5β3γ2s, cystic fibrosis conductance regulator (CFTR), CFTR-Δ508 and two G-protein coupled receptors (GPCRs) without reliance on leader sequences and/or chaperones. In addition, three novel plasmid-encoded sequences used to introduce 3′ untranslated RNA sequence tags in mRNA expression products and differentially-detectable fluorogenic probes directed to each are described. The tags and corresponding fluorogenic signaling probes streamline the process by enabling the multiplexed detection and isolation of cells expressing one or more genes without the need for gene-specific probes.

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