Einfluss von zyklischer dehnung auf die matrixsynthese von humanen patellarsehnenzellen

U. Bosch, J. Zeichen, M. Skutek, I. Albers, M. Van Griensven, N. Gässler

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

19 Zitate (Scopus)

Abstract

The significance of mobilization and loading for healing ligaments and tendons is generally accepted today. Local deformation of cells thereby represents the key stimulus for the cellular response. Less is known, however, about the effects of cyclic strain on the cellular and molecular level. The aim of the in vitro investigation was to determine the effect of cyclic mechanical strain on collagen type I and III and on fibronectin formation in human patellar tendon derived fibroblasts. Human patellar tendon derived fibroblasts from 5 donors (mean age 29.2 years) were cultured under standard conditions. Monolayers of subconfluently grown 3 rd passage cells were stretched in rectangular silicone dishes with cyclic movement along their longitudinal axes. Cyclic strain (5%, 1 Hz) was applied for 30 min and 60 min, respectively. Carboxyterminal procollagen type I propeptide (P-I-CP) and aminoterminal procollagen type III propeptide (P-III-NP) release was measured by a radio-immunoassay 6 h and 12 h after stretching. The release of fibronectin was measured by nephelometry following immunoreaction with a specific antiserum. Cells from each donor without any cyclic stretching served as controls. Compared with the controls, only cyclic stretching for 60 min resulted in a significantly increased release of P-I-CP and fibronectin after 6 h. The release of P-III-NP was significantly increased 12 h after 30 min of cyclic stretching as well as 6 h and 12 h after 60 min of cylic stretching, respectively. We conclude that cyclic stretching causes a time-dependent, differential regulation of formation of fibronectin and collagen type I and III.This may effect the quality and thus the mechanical properties of healing tendon and ligament tissues. In order to improve current treatment protocols and to enlarge our knowledge of tissue healing, it is necessary to understand the cellular response to cyclic strain.

Titel in ÜbersetzungEffect of cyclic strain on matrix formation in human patellar tendon derived fibroblasts
OriginalspracheDeutsch
Seiten (von - bis)437-442
Seitenumfang6
FachzeitschriftUnfallchirurg
Jahrgang105
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 2002
Extern publiziertJa

Schlagwörter

  • Collagen
  • Cyclic strain
  • Fibronectin
  • Human fibroblasts

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