Evidence map›Paper›PMID 22675556›Full record

ArticlePloS one2012

Central role of pyrophosphate in acellular cementum formation.

Brian L Foster, Kanako J Nagatomo, Francisco H Nociti, Hanson Fong, Daisy Dunn, Anne B Tran, Wei Wang, Sonoko Narisawa, Jose Luis Millán, Martha J Somerman

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed
5.1field-weighted citation impact, top 4% 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

82 citing papers in PubMed, 144 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Hypophosphatasia-pathophysiological understanding, preclinical data looking beyond the skeleton, and upcoming treatments.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2026
    Review
  5. Article
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  8. Review
  9. Article
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  11. Establishment of human periodontal ligament cell lines withFrontiers in cell and developmental biology · 2025
    Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Hypoalkaline Phosphatemia Dental Type: A Case Report.Clinical medicine insights. Pediatrics · 2024
    Article
  18. Article
  19. Article
  20. Dentoalveolar Alterations in an Adenine-Induced Chronic Kidney Disease Mouse Model.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2023
    Article

22 more citing papers are in PubMed but not listed here.

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

10 authors at 5 institutions in 2 countries.

Brian L FosterLaboratory of Oral Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, United States of America. brian.foster@nih.gov
Kanako J Nagatomo
Francisco H Nociti
Hanson Fong
Daisy Dunn
Anne B Tran
Wei Wang
Sonoko Narisawa
Jose Luis Millán
Martha J Somerman
Sanford Burnham Prebys Medical Discovery Institute · USUniversity of Washington · USNational Institutes of Health · USNational Institute of Arthritis and Musculoskeletal and Skin Diseases · USUniversidade Estadual de Campinas (UNICAMP) · BR

Funding

MOLECULAR PATHOGENESIS/TREATMENT OF HYPOPHOSPHATASIAR01DE012889 · NIDCR · SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE · PI MILLAN, JOSE LUIS · 1999 to 2020
$9.2M
Laboratory of Oral Connective Tissue BiologyZIAAR041196 · NIAMS · NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES · PI SOMERMAN, MARTHA · 2013 to 2021
$8.9M
COUNTER-REGULATORY MECHANISMS IN BONE MINERALIZATIONR01AR047908 · NIAMS · SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE · PI MILLAN, JOSE LUIS · 2002 to 2011
$3.9M
Key Modulators of CementogenesisR01DE015109 · NIDCR · UNIVERSITY OF WASHINGTON · PI POPOWICS, TRACY E · 2003 to 2011
$2.9M
Intramural NIH HHSNIAMS NIH HHS R01 AR047908NIAMS NIH HHS R01 AR47908NIDCR NIH HHS R01 DE012889NIDCR NIH HHS R01 DE015109NIDCR NIH HHS R01 DE12889NIDCR NIH HHS R01DE15109
6 · The paper itself

Abstract

backgroundInorganic pyrophosphate (PP(i)) is a physiologic inhibitor of hydroxyapatite mineral precipitation involved in regulating mineralized tissue development and pathologic calcification. Local levels of PP(i) are controlled by antagonistic functions of factors that decrease PP(i) and promote mineralization (tissue-nonspecific alkaline phosphatase, Alpl/TNAP), and those that increase local PP(i) and restrict mineralization (progressive ankylosis protein, ANK; ectonucleotide pyrophosphatase phosphodiesterase-1, NPP1). The cementum enveloping the tooth root is essential for tooth function by providing attachment to the surrounding bone via the nonmineralized periodontal ligament. At present, the developmental regulation of cementum remains poorly understood, hampering efforts for regeneration. To elucidate the role of PP(i) in cementum formation, we analyzed root development in knock-out ((-/-)) mice featuring PP(i) dysregulation.

resultsExcess PP(i) in the Alpl(-/-) mouse inhibited cementum formation, causing root detachment consistent with premature tooth loss in the human condition hypophosphatasia, though cementoblast phenotype was unperturbed. Deficient PP(i) in both Ank and Enpp1(-/-) mice significantly increased cementum apposition and overall thickness more than 12-fold vs. controls, while dentin and cellular cementum were unaltered. Though PP(i) regulators are widely expressed, cementoblasts selectively expressed greater ANK and NPP1 along the root surface, and dramatically increased ANK or NPP1 in models of reduced PP(i) output, in compensatory fashion. In vitro mechanistic studies confirmed that under low PP(i) mineralizing conditions, cementoblasts increased Ank (5-fold) and Enpp1 (20-fold), while increasing PP(i) inhibited mineralization and associated increases in Ank and Enpp1 mRNA.

conclusionsResults from these studies demonstrate a novel developmental regulation of acellular cementum, wherein cementoblasts tune cementogenesis by modulating local levels of PP(i), directing and regulating mineral apposition. These findings underscore developmental differences in acellular versus cellular cementum, and suggest new approaches for cementum regeneration.

Indexed as

CementogenesisAlkaline PhosphataseAnimalsCalcification, PhysiologicCell ProliferationCells, CulturedCollagenDental CementumDiphosphatesExtracellular SpaceGene Expression Regulation, DevelopmentalHomeostasisHumansMandibleMiceMice, Inbred C57BLAlkaline Phosphataseank protein, mouseCollagenDiphosphatesectonucleotide pyrophosphatase phosphodiesterase 1Phosphate Transport ProteinsPhosphoric Diester HydrolasesPyrophosphatases

Identifiers

PMID22675556
PMCPMC3366957
OpenAlexW2072930741

What OpenQuestion holds

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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.