Abstract:
:Insertion of reporter cassettes into the Lgr5 locus has enabled the characterization of mouse intestinal stem cells (ISCs). However, low cell surface abundance of LGR5 protein and lack of high-affinity anti-LGR5 antibodies represent a roadblock to efficiently isolate human colonic stem cells (hCoSCs). We set out to identify stem cell markers that would allow for purification of hCoSCs. In an unbiased approach, membrane-enriched protein fractions derived from in vitro human colonic organoids were analyzed by quantitative mass spectrometry. Protein tyrosine pseudokinase PTK7 specified a cell population within human colonic organoids characterized by highest self-renewal and re-seeding capacity. Antibodies recognizing the extracellular domain of PTK7 allowed us to isolate and expand hCoSCs directly from patient-derived mucosa samples. Human PTK7+ cells display features of canonical Lgr5+ ISCs and include a fraction of cells that undergo differentiation toward enteroendocrine lineage that resemble crypt label retaining cells (LRCs).
journal_name
Stem Cell Reportsjournal_title
Stem cell reportsauthors
Jung P,Sommer C,Barriga FM,Buczacki SJ,Hernando-Momblona X,Sevillano M,Duran-Frigola M,Aloy P,Selbach M,Winton DJ,Batlle Edoi
10.1016/j.stemcr.2015.10.003subject
Has Abstractpub_date
2015-12-08 00:00:00pages
979-987issue
6issn
2213-6711pii
S2213-6711(15)00300-8journal_volume
5pub_type
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