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Related Experiment Video

Updated: Jun 14, 2026

A Pre-clinical Rat Model for the Study of Ischemia-reperfusion Injury in Reconstructive Microsurgery

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Published on: November 8, 2019

Mimic hypoxia improves angiogenesis in ischaemic random flaps.

Rui Weng¹, Qingfeng Li, Hua Li

¹Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China.

Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS

|April 3, 2010

Summary

Deferoxamine (DFO) treatment significantly improved survival rates and blood vessel density in ischemic skin flaps by mimicking hypoxia. This approach enhances vascular endothelial growth factor (VEGF) secretion, promoting angiogenesis and protecting cells from hypoxic injury.

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Area of Science:

Regenerative Medicine
Tissue Engineering
Vascular Biology

Background:

Hypoxia is a critical signal for angiogenesis in ischemic tissues.
Hypoxia-induced angiogenesis often fails to prevent tissue necrosis after surgery.
Mimicking hypoxia presents a potential strategy to enhance angiogenesis and reduce necrosis.

Purpose of the Study:

To investigate the efficacy of deferoxamine (DFO), a hypoxia mimic, in treating ischemic random skin flaps.
To evaluate DFO's impact on angiogenesis and flap survival.

Main Methods:

Ischemic random skin flap models were established in mice (n=18).
Groups included DFO-treated and control.
Evaluated VEGF levels, vessel density, and flap survival rate.
In vitro studies assessed VEGF expression and cell viability under DFO, hypoxia, and normoxia.

Main Results:

DFO treatment significantly increased flap survival rate, vessel density, and VEGF levels compared to controls.
In vitro, DFO increased VEGF mRNA and protein secretion in endothelial cells and fibroblasts.
DFO-induced VEGF secretion enhanced endothelial cell viability after hypoxic injury.

Conclusions:

DFO-induced angiogenesis, mediated by VEGF paracrine and autocrine signaling, improves ischemic flap survival.
DFO-induced VEGF autocrine secretion protects endothelial cells from severe hypoxia.