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PXD015955 is an original dataset announced via ProteomeXchange.

Dataset Summary
Titlein vivo environment swiftly restricts human pancreatic progenitors towards monohormonal identity via a HNF1A/HNF4A mechanism
DescriptionGenerating insulin-producing β-cells from human induced pluripotent stem cells is a promising cell replacement therapy aimed at improving or curing certain forms of diabetes. Nevertheless, despite important recent advances, the efficient production of functionally mature β-cells is yet to be achieved, with most current differentiation protocols generating a heterogeneous population comprising of subpopulation of cells expressing different islet hormones, including hybrid polyhormonal entities. A solution to this issue is transplanting end-stages differentiating cells into living hosts, which was demonstrated to majorly improve β-cell maturation. Yet, to date, the cellular and molecular mechanisms underlying the transplanted cells response to the in vivo environment exposure was not yet properly characterized. Here we use global proteomics and large-scale imaging techniques aimed at demultiplexing and filtering cellular processes and molecular signatures modulated by the immediate in vivo effect. We show that in vivo exposure swiftly confines in vitro generated human pancreatic progenitors to single hormone expression. The global proteome landscape of the transplanted cells was closer to the one presented by native human islets, especially in regard to energy metabolism and redox balance. Moreover our study indicates a possible link between these processed and certain epigenetic regulators involved in maintenance and propagation of the islet cells identity. Pathway analysis predicted HNF1A and HNF4A as key regulators controlling the in vivo islet-promoting response, with experimental evidence confirming their involvement in confining islet cell identity. To our knowledge this is the first study demultiplexing the immediate response of the transplanted pancreatic progenitors to in vivo exposure.
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterThomas Aga Legøy
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListTMT6plex-126 reporter+balance reagent acylated residue
InstrumentOrbitrap Fusion Lumos
Dataset History
RevisionDatetimeStatusChangeLog Entry
02019-10-22 01:40:27ID requested
12020-02-12 05:44:26announced
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: Human, iPSC, alginate, in vivo transplant
Contact List
Simona Chera
contact affiliationDepartment of Clinical Science, University of Bergen, Norway
contact emailsimona.chera@uib.no
lab head
Thomas Aga Legøy
contact affiliationUniversity of Bergen
contact emailtle088@uib.no
dataset submitter
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