COL1A1 oligodeoxynucleotides decoy: Biochemical and morphologic effects in an acute wound repair model

Shawn M. Rosensteel, Ronald P. Wilson, Sheryl L. White, H. Paul Ehrlich

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Type I collagen is an integral component of granulation tissue and scar, that is highly dependent on TGFβ1, a member of a pro-fibrotic family of cytokines, for its promotion and deposition. Blocking COL1A1 gene transcription obstructs type I collagen synthesis, hindering the progress of granulation tissue deposition and fibrosis. Local injections of a double stranded oligodeoxynucleotide (dsODN) decoy, containing the TGFβ1 regulatory element that is located in the distal promoter of the COL1A1 gene, were investigated in a rat polyvinyl alcohol (PVA) sponge granulation tissue implant model. The effects on the granulation tissue deposition by dsODN decoy therapy were evaluated by the synthesis of types I and III collagens as well as ED-A (cellular) fibronectin. Fluorescently labeled dsODN was used to identify the distribution of the decoy molecules in the sponge implant relative to the observed histological effects. Morphological alterations in cells and changes in the organization of connective tissue were documented and evaluated. Collagen levels were reduced by half in implants treated with 10. nM dsODN decoy compared to scrambled dsODN-treated implants. Histologically, dsODN decoy treated implants had an increased cellular density without a corresponding increase in deposited connective tissue. Polarized light birefringence pattern of Sirius red-stained sections showed less collagen fibers accumulating between fibroblasts. The highest concentration of fluorescently labeled dsODN was identified within the interior margin of sponge implants, correlating to increased cellular density and an altered birefringence patterns. In conclusion, 10. nM dsODN decoy therapy reduced collagen deposition and altered the organization of granulation tissue, supporting its potential as a localized anti-fibrotic therapy for limiting fibrotic conditions.

Original languageEnglish (US)
Pages (from-to)307-313
Number of pages7
JournalExperimental and Molecular Pathology
Volume89
Issue number3
DOIs
StatePublished - Dec 1 2010

Fingerprint

Oligodeoxyribonucleotides
Repair
Granulation
Granulation Tissue
Tissue
Wounds and Injuries
Collagen Type I
Birefringence
Collagen
Porifera
Connective Tissue
Genes
Polyvinyl Alcohol
Collagen Type III
Transcription
Fibroblasts
Light polarization
Fibronectins
Cicatrix
Rats

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Molecular Biology
  • Clinical Biochemistry

Cite this

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title = "COL1A1 oligodeoxynucleotides decoy: Biochemical and morphologic effects in an acute wound repair model",
abstract = "Type I collagen is an integral component of granulation tissue and scar, that is highly dependent on TGFβ1, a member of a pro-fibrotic family of cytokines, for its promotion and deposition. Blocking COL1A1 gene transcription obstructs type I collagen synthesis, hindering the progress of granulation tissue deposition and fibrosis. Local injections of a double stranded oligodeoxynucleotide (dsODN) decoy, containing the TGFβ1 regulatory element that is located in the distal promoter of the COL1A1 gene, were investigated in a rat polyvinyl alcohol (PVA) sponge granulation tissue implant model. The effects on the granulation tissue deposition by dsODN decoy therapy were evaluated by the synthesis of types I and III collagens as well as ED-A (cellular) fibronectin. Fluorescently labeled dsODN was used to identify the distribution of the decoy molecules in the sponge implant relative to the observed histological effects. Morphological alterations in cells and changes in the organization of connective tissue were documented and evaluated. Collagen levels were reduced by half in implants treated with 10. nM dsODN decoy compared to scrambled dsODN-treated implants. Histologically, dsODN decoy treated implants had an increased cellular density without a corresponding increase in deposited connective tissue. Polarized light birefringence pattern of Sirius red-stained sections showed less collagen fibers accumulating between fibroblasts. The highest concentration of fluorescently labeled dsODN was identified within the interior margin of sponge implants, correlating to increased cellular density and an altered birefringence patterns. In conclusion, 10. nM dsODN decoy therapy reduced collagen deposition and altered the organization of granulation tissue, supporting its potential as a localized anti-fibrotic therapy for limiting fibrotic conditions.",
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COL1A1 oligodeoxynucleotides decoy : Biochemical and morphologic effects in an acute wound repair model. / Rosensteel, Shawn M.; Wilson, Ronald P.; White, Sheryl L.; Ehrlich, H. Paul.

In: Experimental and Molecular Pathology, Vol. 89, No. 3, 01.12.2010, p. 307-313.

Research output: Contribution to journalArticle

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AU - Wilson, Ronald P.

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AU - Ehrlich, H. Paul

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