RNA Interference Targeting Hypoxia Inducible Factor 1α Reduces Post-Operative Adhesions in Rats

Tatiana Segura, Hugo Schmokel, Jeffrey A. Hubbell

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Background: To investigate the use of RNA interference mediated gene down-regulation targeting hypoxia inducible factor 1α (HIF-1α) and plasminogen activator inhibitor 1 (PAI-1) in an effort to prevent abdominal adhesion formation. Materials and methods: Real time PCR and a PAI-1 protein activity assay were used in vitro to determine the efficacy of small interfering RNAs (siRNAs). For in vivo experiments, 57 white female rats were operated to generate ischemic and serosal injury to the uterine horns, and treated with saline, siRNALamin A/C (negative control), siRNAHIF-1α, siRNAPAI-1, or siRNAHIF-1α plus siRNAPAI-1. The cationic polyer poly(ethylenimine) (PEI) was used as the delivery vehicle for all siRNAs delivered in vivo. Adhesions were analyzed by a blinded surgeon 8 days post-surgery. Results: After in vitro transfection with siRNA, at least 69% gene down-regulation was obtained for all siRNAs tested. In vitro siRNA-mediated down-regulation of HIF-1α, PAI-1 or their simultaneous delivery resulted in a significant decrease of PAI-1 protein activity (at least P < 0.05). Administration of 4 nmol siRNAHIF-1α/PEI complexes after injury to the uterine horns achieved a statistical reduction of post-operative adhesion formation with a reduction by 52% (P < 0.05). Delivery of 4 nmol siRNAPAI-1/PEI complexes and the simultaneous delivery of 2 nmol siRNAHIF-1α plus 2 nmol siRNAPAI-1, resulted in a reduction of abdominal adhesion by 36% and 42%, respectively, with the reduction being statistically significant when compared directly to the saline control (P < 0.01). Conclusion: These data show that administration of siRNA/PEI complexes within the peritoneal cavity can be used to prevent post-operative abdominopelvic adhesions.

Original languageEnglish
Pages (from-to)162-170
Number of pages9
JournalJournal of Surgical Research
Volume141
Issue number2
DOIs
StatePublished - Aug 1 2007
Externally publishedYes

Fingerprint

Hypoxia-Inducible Factor 1
RNA Interference
Small Interfering RNA
Plasminogen Activator Inhibitor 1
Replication Protein C
Down-Regulation
Peritoneal Cavity
Wounds and Injuries
Ambulatory Surgical Procedures
Genes
Transfection
Real-Time Polymerase Chain Reaction
In Vitro Techniques

Keywords

  • abdominal adhesion prevention
  • non-viral
  • polyethyleneimine
  • siRNA

ASJC Scopus subject areas

  • Surgery

Cite this

RNA Interference Targeting Hypoxia Inducible Factor 1α Reduces Post-Operative Adhesions in Rats. / Segura, Tatiana; Schmokel, Hugo; Hubbell, Jeffrey A.

In: Journal of Surgical Research, Vol. 141, No. 2, 01.08.2007, p. 162-170.

Research output: Contribution to journalArticle

Segura, Tatiana ; Schmokel, Hugo ; Hubbell, Jeffrey A. / RNA Interference Targeting Hypoxia Inducible Factor 1α Reduces Post-Operative Adhesions in Rats. In: Journal of Surgical Research. 2007 ; Vol. 141, No. 2. pp. 162-170.
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