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Functional Genomic Screening During Somatic Cell Reprogramming Identifies DKK3 as a Roadblock of Organ Regeneration. | LitMetric

AI Article Synopsis

Article Abstract

Somatic cell reprogramming and tissue repair share relevant factors and molecular programs. Here, Dickkopf-3 (DKK3) is identified as novel factor for organ regeneration using combined transcription-factor-induced reprogramming and RNA-interference techniques. Loss of enhances the generation of induced pluripotent stem cells but does not affect de novo derivation of embryonic stem cells, three-germ-layer differentiation or colony formation capacity of liver and pancreatic organoids. However, DKK3 expression levels in wildtype animals and serum levels in human patients are elevated upon injury. Accordingly, -null mice display less liver damage upon acute and chronic failure mediated by increased proliferation in hepatocytes and LGR5 liver progenitor cell population, respectively. Similarly, recovery from experimental pancreatitis is accelerated. Regeneration onset occurs in the acinar compartment accompanied by virtually abolished canonical-Wnt-signaling in -null animals. This results in reduced expression of the Hedgehog repressor and increased Hedgehog-signaling activity upon loss. Collectively, these data reveal as a key regulator of organ regeneration via a direct, previously unacknowledged link between DKK3, canonical-Wnt-, and Hedgehog-signaling.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8292873PMC
http://dx.doi.org/10.1002/advs.202100626DOI Listing

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