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Updated: May 10, 2025
Electroporation-Mediated Delivery of Cas9 Ribonucleoproteins and mRNA into Freshly Isolated Primary Mouse Hepatocytes
Published on: June 2, 2022
Investigation on ABCC6-Deficient Human Hepatocytes Generated by CRISPR-Cas9 Genome Editing.
Ricarda Plümers1, Svenja Jelinek1, Christopher Lindenkamp1
1Herz- und Diabeteszentrum Nordrhein-Westfalen, Institut für Laboratoriums- und Transfusionsmedizin, Universitätsklinik der Ruhr-Universität Bochum, Medizinische Fakultät OWL (Universität Bielefeld), Georgstraße 11, 32545 Bad Oeynhausen, Germany.
Researchers created a new model for studying pseudoxanthoma elasticum (PXE), a rare genetic disorder. This model uses gene editing in liver cells to investigate the role of ATP-binding cassette transporter subfamily C member 6 (ABCC6) in PXE.
Area of Science:
- Genetics and Molecular Biology
- Rare Disease Research
- Cellular Metabolism
Background:
- Pseudoxanthoma elasticum (PXE) is a rare genetic disorder characterized by calcification of elastic fibers in various tissues.
- Mutations in the ATP-binding cassette transporter subfamily C member 6 (ABCC6) gene are linked to PXE, but its substrate and PXE's exact nature as a metabolic disorder remain unclear.
- ABCC6's predominant expression in the liver suggests a potential metabolic basis for PXE.
Purpose of the Study:
- To develop a genome-editing system targeting ABCC6 in human hepatocytes to create a model for studying PXE.
- To investigate the pathobiochemical characteristics of PXE in ABCC6-deficient liver cells.
- To provide an in vitro tool for understanding PXE's metabolic aspects.
Main Methods:
- Developed a clustered regulatory interspaced short palindromic repeat (CRISPR-Cas9) genome-editing system targeting ABCC6 in human immortalized hepatocytes (HepIms).
- Generated heterozygous (htHepIm) and compound heterozygous (chtHepIm) ABCC6-deficient cell clones.
- Analyzed these clones for key markers related to PXE pathobiochemistry, including lipid trafficking, extracellular matrix remodeling, and inflammatory markers.
Main Results:
- Identified ABCC6-deficient HepIm clones exhibiting potential defects in lipid trafficking and extracellular matrix remodeling.
- Observed induction of calcification inhibitor expression and downregulation of senescence and inflammatory markers in the deficient cells.
- The developed model recapitulates several features of PXE pathobiochemistry.
Conclusions:
- The ABCC6-deficient HepIm model offers a valuable in vitro tool for investigating the metabolic underpinnings of PXE.
- Initial findings suggest ABCC6 deficiency impacts cellular processes relevant to PXE pathogenesis.
- This model facilitates future research into PXE's metabolic characteristics and potential therapeutic strategies.
