Evidence map›Paper›PMID 15539460›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2004

Mechanotransduction and strain amplification in osteocyte cell processes.

Yuefeng Han, Stephen C Cowin, Mitchell B Schaffler, Sheldon Weinbaum

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 143 papers.

0numbers the graph read from it
0cells of the map it votes in
143citing papers in PubMed
6.7field-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

143 citing papers in PubMed, 490 citations in OpenAlex.

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83 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

4 authors at 2 institutions in 1 country.

Yuefeng HanDepartments of Biomedical and Mechanical Engineering, City College and Graduate School of the City University of New York, New York, NY 10031, USA.
Stephen C Cowin
Mitchell B Schaffler
Sheldon Weinbaum
City University of New York · USIcahn School of Medicine at Mount Sinai · US

Funding

Osteocyte Integrity and Bone RemodelingR01AR041210 · NIAMS · MOUNT SINAI SCHOOL OF MEDICINE OF NYU · PI SCHAFFLER, MITCHELL B · 1997 to 2019
$5.8M
Cytoskeletal Strain Amplification due to Bone Fluid FlowR01AR048699 · NIAMS · CITY COLLEGE OF NEW YORK · PI WEINBAUM, SHELDON · 2002 to 2006
$1.7M
MICRODAMAGE AND BONE REMODELING IN STRESS FRACTURER29AR041210 · NIAMS · HENRY FORD HEALTH SYSTEM · PI SCHAFFLER, MITCHELL B · 1992 to 1996
–
NIAMS NIH HHS AR41210NIAMS NIH HHS AR48699NIAMS NIH HHS R01 AR041210NIAMS NIH HHS R01 AR048699
6 · The paper itself

Abstract

A paradox in bone tissue is that tissue-level strains due to animal and human locomotion are too small to initiate intracellular chemical responses directly. A model recently was proposed to resolve this paradox, which predicts that the fluid flow through the pericellular matrix in the lacunar-canalicular porosity due to mechanical loading can induce strains in the actin filament bundles of the cytoskeleton that are more than an order of magnitude larger than tissue level strains. In this study, we greatly refine this model by using the latest ultrastructural data for the cell process cytoskeleton, the tethering elements that attach the process to the canalicular wall and their finite flexural rigidity EI. We construct a much more realistic 3D model for the osteocyte process and then use large-deformation "elastica" theory for finite EI to predict the deformed shape of the tethering elements and the hoop strain on the central actin bundle. Our model predicts a cell process that is 3 times stiffer than in a previous study but hoop strain of >0.5% for tissue-level strains of >1,000 microstrain at 1 Hz and >250 microstrain at frequencies >10 Hz. We propose that this strain-amplification model provides a more likely hypothesis for the excitation of osteocytes than the previously proposed fluid-shear hypothesis.

Indexed as

Models, BiologicalActinsAnimalsBiomechanical PhenomenaCytoskeletonElasticityHumansMechanotransduction, CellularOsteocytesActins

Identifiers

PMID15539460
PMCPMC534548
OpenAlexW2093930926

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.