Evidence map›Paper›PMID 17202186›Full record

ArticleDevelopment (Cambridge, England)2007

Nkx2.2-repressor activity is sufficient to specify alpha-cells and a small number of beta-cells in the pancreatic islet.

Michelle J Doyle, Zoe L Loomis, Lori Sussel

Open access · bronzeAbstract read
In one paragraph

Article in Development (Cambridge, England), 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
7.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 82 citations in OpenAlex.

  1. mNature metabolism · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Michelle J DoyleProgram in Molecular Biology, University of Colorado at Denver Health Sciences Center, Aurora, CO 80045, USA.
Zoe L Loomis
Lori Sussel
University of Colorado Denver · USDenver Health Medical Center · US

Funding

UCHSC DIABETES ENDOCRINOLOGY RESEARCH CENTERP30DK057516 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI HUTTON, JOHN C · 2000 to 2010
$14.0M
Regulation of Pancreatic Islet Cell FateR01DK082590 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI LORI SUSSEL · 2009 to 2026
$7.3M
Proteomic/Genomic Analysis of the Developing PancreasU19DK061248 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI HUTTON, JOHN C · 2001 to 2004
$4.8M
Predoctoral Training Program in Molecular BiologyT32GM008730 · NIGMS · UNIVERSITY OF COLORADO DENVER · PI PREKERIS, RYTIS, SCLAFANI, ROBERT A · 1999 to 2019
$3.3M
Defining the roles of Nkx2.2 and NeuroD in regulating islet cell fateU01DK072504 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI SUSSEL, LORI · 2005 to 2010
$3.2M
NIDDK NIH HHS P30 DK057516NIDDK NIH HHS P30 DK57516NIDDK NIH HHS R01 DK082590NIDDK NIH HHS U01 DK072504NIDDK NIH HHS U19 DK061248NIGMS NIH HHS T32 GM008730NIGMS NIH HHS T32-GM08730
6 · The paper itself

Abstract

The homeodomain protein Nkx2.2 (Nkx2-2) is a key regulator of pancreatic islet cell specification in mice; Nkx2.2 is essential for the differentiation of all insulin-producing beta-cells and of the majority of glucagon-producing alpha-cells, and, in its absence, these cell types are converted to a ghrelin cell fate. To understand the molecular functions of Nkx2.2 that regulate these early cell-fate decisions during pancreatic islet development, we created Nkx2.2-dominant-derivative transgenic mice. In the absence of endogenous Nkx2.2, the Nkx2.2-Engrailed-repressor derivative is sufficient to fully rescue glucagon-producing alpha-cells and to partially rescue insulin-producing beta-cells. Interestingly, the insulin-positive cells that do form in the rescued mice do not express the mature beta-cell markers MafA or Glut2 (Slc2a2), suggesting that additional activator functions of Nkx2.2 are required for beta-cell maturation. To explore the mechanism by which Nkx2.2 functions as a repressor in the islet, we assessed the pancreatic expression of the Groucho co-repressors, Grg1, Grg2, Grg3 and Grg4 (Tle1-Tle4), which have been shown to interact with and modulate Nkx2.2 function. We determined that Grg3 is highly expressed in the embryonic pancreas in a pattern similar to Nkx2.2. Furthermore, we show that Grg3 physically interacts with Nkx2.2 through its TN domain. These studies suggest that Nkx2.2 functions predominantly as a transcriptional repressor during specification of endocrine cell types in the pancreas.

Indexed as

AnimalsBase SequenceCell DifferentiationCo-Repressor ProteinsDNA PrimersGene Expression Regulation, DevelopmentalGlucagon-Secreting CellsHomeobox Protein Nkx-2.2Homeodomain ProteinsInsulin-Secreting CellsIslets of LangerhansMiceMice, KnockoutMice, TransgenicModels, BiologicalPhenotypeCo-Repressor ProteinsDNA PrimersHomeobox Protein Nkx-2.2Homeodomain Proteinsnkx2.2b protein, zebrafishNkx2-2 protein, mousepancreatic and duodenal homeobox 1 proteinProteinsRepressor ProteinsTle3 protein, mouseTrans-ActivatorsTranscription FactorsZebrafish Proteins

Identifiers

PMID17202186
PMCPMC2805074
OpenAlexW2093489239

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.