Evidence map›Paper›PMID 22703652›Full record

ArticleJournal of endodontics2012

Hypophosphatasia-associated deficiencies in mineralization and gene expression in cultured dental pulp cells obtained from human teeth.

Thaisângela L Rodrigues, Brian L Foster, Karina G Silverio, Luciane Martins, Marcio Z Casati, Enilson A Sallum, Martha J Somerman, Francisco H Nociti

Open access · greenAbstract read
In one paragraph

Article in Journal of endodontics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 24% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Hypophosphatasia: Canadian update on diagnosis and management.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2019
    Guideline
  2. Article
  3. Establishment of human periodontal ligament cell lines withFrontiers in cell and developmental biology · 2025
    Article
  4. Article
  5. Article
  6. Article
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  11. Review
  12. Article
  13. Article
  14. MEPE Localization in the Craniofacial Complex and Function in Tooth Dentin Formation.The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society · 2016
    Article
  15. The rachitic tooth.Endocrine reviews · 2014
    Review
  16. Article
  17. Tooth root dentin mineralization defects in a mouse model of hypophosphatasia.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2013
    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

8 authors at 3 institutions in 2 countries.

Thaisângela L RodriguesDepartment of Prosthodontics and Periodontics, Division of Periodontics, School of Dentistry, Campinas State University, Piracicaba, São Paulo, Brazil.
Brian L Foster
Karina G Silverio
Luciane Martins
Marcio Z Casati
Enilson A Sallum
Martha J Somerman
Francisco H Nociti
Universidade Estadual de Campinas (UNICAMP) · BRNational Institute of Arthritis and Musculoskeletal and Skin Diseases · USNational Institutes of Health · US

Funding

Laboratory of Oral Connective Tissue BiologyZIAAR041196 · NIAMS · NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES · PI SOMERMAN, MARTHA · 2013 to 2021
$8.9M
Key Modulators of CementogenesisR01DE015109 · NIDCR · UNIVERSITY OF WASHINGTON · PI POPOWICS, TRACY E · 2003 to 2011
$2.9M
Key Modulators of CementogenesisR56DE015109 · NIDCR · UNIVERSITY OF WASHINGTON · PI SOMERMAN, MARTHA J · 2007 to 2007
$390k
Phosphate Modulation of Dental TissuesR03TW007590 · FIC · UNIVERSITY OF WASHINGTON · PI SOMERMAN, MARTHA J · 2006 to 2008
$116k
FIC NIH HHS 5R03TW007590-03FIC NIH HHS R03 TW007590NIDCR NIH HHS DE15109NIDCR NIH HHS R01 DE015109NIDCR NIH HHS R56 DE015109
6 · The paper itself

Abstract

introductionMutations in the gene ALPL in hypophosphatasia (HPP) reduce the function of tissue nonspecific alkaline phosphatase, and the resulting increase in pyrophosphate (PP(i)) contributes to bone and tooth mineralization defects by inhibiting physiologic calcium-phosphate (P(i)) precipitation. Although periodontal phenotypes are well documented, pulp/dentin abnormalities have been suggested in the clinical literature although reports are variable and underlying mechanisms remains unclear. In vitro analyses were used to identify mechanisms involved in HPP-associated pulp/dentin phenotypes.

methodsPrimary pulp cells cultured from HPP subjects were established to assay alkaline phosphatase (ALP) activity, mineralization, and gene expression compared with cells from healthy controls. Exogenous P(i) was provided to the correct P(i)/PP(i) ratio in cell culture.

resultsHPP cells exhibited significantly reduced ALP activity (by 50%) and mineral nodule formation (by 60%) compared with the controls. The expression of PP(i) regulatory genes was altered in HPP pulp cells, including reduction in the progressive ankylosis gene (ANKH) and increased ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1). Odontoblast marker gene expression was disrupted in HPP cells, including reduced osteopontin (OPN), dentin matrix protein 1 (DMP1), dentin sialophosphoprotein (DSPP), and matrix extracellular phosphoprotein (MEPE). The addition of P(i) provided a corrective measure for mineralization and partially rescued the expression of some genes although cells retained altered messenger RNA levels for PP(i)-associated genes.

conclusionsThese studies suggest that under HPP conditions pulp cells have the compromised ability to mineralize and feature a disrupted odontoblast profile, providing a first step toward understanding the molecular mechanisms for dentin phenotypes observed in HPP.

Indexed as

AdolescentAlkaline PhosphataseAmino Acid SubstitutionAnalysis of VarianceCalciumCase-Control StudiesDental PulpDentinDentin SialophosphoproteinDiphosphatesDiseases in TwinsDown-RegulationExtracellular Matrix ProteinsFemaleGene ExpressionGlycoproteinsAlkaline PhosphataseALPL protein, humanANKH protein, humanCalciumDentin SialophosphoproteinDiphosphatesdiphosphoric acidDMP1 protein, humanectonucleotide pyrophosphatase phosphodiesterase 1Extracellular Matrix ProteinsGlycoproteinsMEPE protein, humanOsteopontinPhosphate Transport ProteinsPhosphoproteinsPhosphoric Diester HydrolasesPyrophosphatasesSialoglycoproteins

Identifiers

PMID22703652
PMCPMC3547603
OpenAlexW1982042298

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.