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Periostin modulates extracellular matrix behavior in tendons.

Kevin I Rolnick1, Joshua A Choe1, Ellen M Leiferman1

  • 1Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, WI 53705, USA.

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|November 21, 2022
PubMed
Summary
This summary is machine-generated.

Periostin (Postn) is crucial for Achilles tendon healing, impacting extracellular matrix production and cell proliferation. Its absence impairs healing and reduces tendon strength and stiffness.

Keywords:
ANOVA, analysis of varianceCollagenDAB, diaminobenzidineECM, extracellular matrixH&E, hematoxylin and eosinHealingIHC, immunohistochemistryMCL, medial collateral ligamentMTJ, musculotendinous junctionOCT, optimal cutting temperatureOSF-2, osteoblast specific factor-2PeriostinPostn, periostinSMA, smooth muscle actinScarTEM, transmission electron microscopyTendonWT, wild typeWound

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Area of Science:

  • Biochemistry
  • Extracellular Matrix Biology
  • Musculoskeletal Research

Background:

  • Periostin (Postn), also known as osteoblast-specific factor 2 (OSF-2), is vital for maintaining extracellular matrix (ECM) in collagen-rich tissues.
  • Postn is recognized for its role in wound healing and scar formation by influencing cell proliferation and collagen fibrillogenesis.

Purpose of the Study:

  • To investigate the role of periostin in Achilles tendon healing.
  • To determine how periostin influences ECM production and tendon biomechanics.

Main Methods:

  • Utilized periostin homozygous (Postn-/-) and heterozygous (Postn+/-) mouse models to study Achilles tendon healing.
  • Examined intact dorsal tail tendons to assess collagen composition and function in the absence of periostin.

Main Results:

  • Postn-/- and Postn+/- Achilles tendons showed impaired healing, characterized by delayed wound closure, increased type III collagen, reduced cell proliferation, and decreased tensile strength.
  • Periostin ablation in intact tail tendons led to reduced tensile strength and stiffness, along with altered collagen fibril distribution.

Conclusions:

  • Periostin significantly influences Achilles tendon healing by modulating ECM production and cellular processes.
  • Periostin also plays a role in maintaining the structural integrity and biomechanical properties of intact tendons.