The role of myeloperoxidase in the pathogenesis of postoperative adhesions

Ghassan M. Saed, Zhongliang Jiang, Michael Peter Diamond, Husam M. Abu-Soud

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Hypoxia induces the adhesion phenotype, characterized by enhanced extracellular matrix molecule and cytokine expression. Additionally, hypoxia reduces myeloperoxidase (MPO) activity in normal peritoneal fibroblasts to basal levels of adhesion fibroblasts indicating the importance of this enzyme in the development of the adhesion phenotype and also in tissue fibrosis. Immunohistochemistry was used to detect and localize MPO and inducible nitric oxide synthase (iNOS) in fibroblasts. Silencing of these genes was performed using siRNA technology. Levels of iNOS, MPO, type I collagen, and transforming growth factor were detected using real-time reverse transcription-polymerase chain reaction (RT-PCR), while HPLC was used to measure nitrate/nitrite levels. Our results show a unique interaction between MPO and iNOS, which are colocalized in both cell lines. Silencing iNOS reduced MPO and nitric oxide levels while silencing MPO had similar results, but to a lesser extent in both cell types. Additionally, silencing iNOS reduced type I collagen and transforming growth factor-β in adhesion fibroblasts, but to a lesser extent in peritoneal fibroblasts. These studies identify MPO and iNOS as key enzymes in the cellular response to hypoxia and consequent development of tissue fibrosis.

Original languageEnglish (US)
Pages (from-to)531-539
Number of pages9
JournalWound Repair and Regeneration
Volume17
Issue number4
DOIs
StatePublished - Jul 1 2009

Fingerprint

Peroxidase
Nitric Oxide Synthase Type II
Fibroblasts
Nitric Oxide Synthase Type I
Transforming Growth Factors
Fibrosis
Collagen
Phenotype
Gene Silencing
Enzymes
Nitrites
Nitrates
Small Interfering RNA
Reverse Transcription
Extracellular Matrix
Nitric Oxide
Immunohistochemistry
High Pressure Liquid Chromatography
Cytokines
Technology

ASJC Scopus subject areas

  • Surgery
  • Dermatology

Cite this

The role of myeloperoxidase in the pathogenesis of postoperative adhesions. / Saed, Ghassan M.; Jiang, Zhongliang; Diamond, Michael Peter; Abu-Soud, Husam M.

In: Wound Repair and Regeneration, Vol. 17, No. 4, 01.07.2009, p. 531-539.

Research output: Contribution to journalArticle

Saed, Ghassan M. ; Jiang, Zhongliang ; Diamond, Michael Peter ; Abu-Soud, Husam M. / The role of myeloperoxidase in the pathogenesis of postoperative adhesions. In: Wound Repair and Regeneration. 2009 ; Vol. 17, No. 4. pp. 531-539.
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