Evidence map›Paper›PMID 23062866›Full record

ArticleJournal of biomechanics2013

Depth-dependent anisotropy of the micromechanical properties of the extracellular and pericellular matrices of articular cartilage evaluated via atomic force microscopy.

Morgan A McLeod, Rebecca E Wilusz, Farshid Guilak

Abstract read
In one paragraph

Article in Journal of biomechanics, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

53 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  3. TheMaterials today. Bio · 2026
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  6. Maternal high-fat high-sugar diet impairs bone quality and strength but not cartilage in aging mice.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025
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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.

Morgan A McLeodDepartments of Orthopaedic Surgery and Biomedical Engineering, Duke University, Durham, NC, USA.
Rebecca E Wilusz
Farshid Guilak

Funding

Thermally-Triggered Intra-articular Drug Delivery for OAP01AR050245 · NIAMS · DUKE UNIVERSITY · PI GUILAK, FARSHID · 2003 to 2012
$11.5M
VISCOELASTIC PROPERTIES OF NORMAL AND OA CHONDRONSR01AG015768 · NIA · WASHINGTON UNIVERSITY · PI GUILAK, FARSHID · 1998 to 2022
$7.7M
Mechanical and Osmotic Signaling in ChondrocytesR01AR048182 · NIAMS · DUKE UNIVERSITY · PI GUILAK, FARSHID · 2003 to 2013
$3.0M
Intrinsic Repair of the Knee MeniscusR01AR048852 · NIAMS · DUKE UNIVERSITY · PI GUILAK, FARSHID · 2007 to 2011
$1.4M
NIAMS NIH HHS AR48182NIAMS NIH HHS AR48852NIAMS NIH HHS AR50245NIAMS NIH HHS P01 AR050245NIAMS NIH HHS R01 AR048182NIAMS NIH HHS R01 AR048852NIA NIH HHS AG15768NIA NIH HHS R01 AG015768
6 · The paper itself

Abstract

The extracellular matrix (ECM) of articular cartilage is structurally and mechanically inhomogeneous and anisotropic, exhibiting variations in composition, collagen fiber architecture, and pericellular matrix (PCM) morphology among the different zones (superficial, middle, and deep). Joint loading exposes chondrocytes to a complex biomechanical environment, as the microscale mechanical environment of the chondrocyte depends on the relative properties of its PCM and local ECM. ECM anisotropy and chondrocyte deformation are influenced by the split-line direction, the preferred collagen fiber orientation parallel to the articular surface. While previous studies have demonstrated that cartilage macroscale properties vary with depth and the direction of loading relative to the split-line direction, the potential anisotropic behavior of the ECM and PCM at the microscale has yet to be examined. The goal of this study was to characterize the depth and directional dependence of the microscale biomechanical properties of porcine cartilage ECM and PCM in situ. Cartilage was cryosectioned to generate samples oriented parallel and perpendicular to the split-line direction and normal to the articular surface. Atomic force microscopy (AFM)-based stiffness mapping was utilized to measure ECM and PCM microscale elastic properties in all three directions within each zone. Distinct anisotropy in ECM elastic moduli was observed in the superficial and deep zones, while the middle zone exhibited subtle anisotropy. PCM elastic moduli exhibited zonal uniformity with depth and directional dependence when pooled across the zones. These findings provide new evidence for mechanical inhomogeneity and anisotropy at the microscale in articular cartilage.

Indexed as

Cartilage, ArticularChondrocytesExtracellular MatrixAnimalsAnisotropyMicroscopy, Atomic ForceSwineWeight-Bearing

Identifiers

PMID23062866
PMCPMC3549024

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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.