Evidence map›Paper›PMID 22243264›Full record

ArticleEuropean journal of oral sciences2011

Cell proliferation and apoptosis in enamelin null mice.

Jan C-C Hu, Rangsiyakorn Lertlam, Amelia S Richardson, Charles E Smith, Marc D McKee, James P Simmer

Open access · bronzeAbstract read
In one paragraph

Article in European journal of oral sciences, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

12 citing papers in PubMed, 19 citations in OpenAlex.

  1. Article
  2. Role of Cell Death in Cellular Processes During Odontogenesis.Frontiers in cell and developmental biology · 2021
    Review
  3. Article
  4. ENAM mutations and digenic inheritance.Molecular genetics & genomic medicine · 2019
    Article
  5. Article
  6. Review
  7. Ultrastructure of early amelogenesis in wild-type,Molecular genetics & genomic medicine · 2016
    Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
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

6 authors at 2 institutions in 2 countries.

Jan C-C HuDepartment of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI 48108, USA. janhu@umich.edu
Rangsiyakorn Lertlam
Amelia S Richardson
Charles E Smith
Marc D McKee
James P Simmer
University of Michigan–Ann Arbor · USMcGill University · CA

Funding

Proteomics and Genetics of Enamel and DentinR01DE015846 · NIDCR · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI HU, JAN CHING CHUN · 2004 to 2019
$5.7M
ENAMEL WITHOUT ENAMELINR01DE011301 · NIDCR · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI HU, JAN C-C · 2003 to 2007
$1.5M
Enamel and EnamelinR56DE011301 · NIDCR · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI HU, JAN CHING CHUN · 2010 to 2010
$367k
PORCINE ENAMEL PROTEINSR29DE011301 · NIDCR · UNIVERSITY OF TEXAS HLTH SCI CTR SAN ANT · PI HU, JAN C-C · 1997 to 2001
$212k
NIDCR NIH HHS DE011301NIDCR NIH HHS R01 DE011301NIDCR NIH HHS R01 DE015846NIDCR NIH HHS R29 DE011301NIDCR NIH HHS R56 DE011301
6 · The paper itself

Abstract

Enamelin is a secreted glycoprotein that is critical for dental enamel formation. Ameloblasts in enamelin (Enam) null mice develop atypical features that include the absence of a Tomes' process, expanded endoplasmic reticulum, apparent loss of polarity, and pooling of extracellular matrix in all directions, including between ameloblasts and the stratum intermedium. We hypothesized that ameloblast pathological changes may be associated with increased cell apoptosis. Our objective was to assess apoptotic activity in maxillary first molars of wild-type, Enam(+/-), and Enam(-/-) mice at postnatal days 5, 7, 9, 14, and 17. Mouse maxillae were characterized by light microscopy after terminal deoxynucleotidyl transferase (TdT)-mediated biotin-dUTP nick-end labelling (TUNEL) or 5-bromo-2'-deoxyuridine (BrdU) staining. Following the initial deposition of dentin matrix, ameloblasts became highly dysplastic and no enamel crystal ribbons were deposited. Ameloblast apoptosis was observed in the Enam null mice starting in the secretory stage and with no apparent alteration in cell proliferation. We conclude that in the absence of enamelin and subsequent shutdown of enamel formation, ameloblasts undergo pathological changes early in the secretory stage that are evident as radically altered cell morphology, detachment from the tooth surface, apoptosis, and formation of ectopic calcifications both outside and inside the dystrophic enamel organ.

Indexed as

AmeloblastsAmelogenesis ImperfectaAnimalsApoptosisbeta-GalactosidaseBromodeoxyuridineCalcinosisCell ProliferationCrystallizationDental Enamel ProteinsIn Situ Nick-End LabelingMiceMice, KnockoutMolarTooth Calcificationbeta-GalactosidaseBromodeoxyuridineDental Enamel Proteinstuftelin

Identifiers

PMID22243264
PMCPMC3292790
OpenAlexW2123578416

What OpenQuestion holds

Textmetadata
LicenceTDM
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.