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Published on: September 9, 2011
Injectable Thermosensitive Placental ECM-Copper Hydrogel With Endothelial Progenitor Cells for Pressure Ulcer Repair.
Motahareh Rajabi Fomeshi1,2, Mazaher Gholipourmalekabadi3,4, Fatemeh Eskandari1,2
1Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran.
Summary
This study developed an injectable hydrogel using placenta-derived extracellular matrix and copper sulfate with endothelial progenitor cells to treat pressure ulcers. The novel biomaterial significantly accelerated wound healing and promoted tissue regeneration in preclinical models.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Wound Healing Research
Background:
- Pressure ulcers present a significant clinical challenge due to a complex wound microenvironment hindering regeneration.
- Ischemia, extracellular matrix disruption, and impaired angiogenesis are key factors limiting effective healing.
Purpose of the Study:
- To develop an injectable, thermosensitive hydrogel incorporating human placenta-derived soluble extracellular matrix (sECM) and low-dose copper sulfate (CuSO4).
- To combine the hydrogel with endothelial progenitor cells (EPCs) for enhanced pressure ulcer treatment.
- To evaluate the therapeutic efficacy of this composite hydrogel in a preclinical pressure ulcer model.
Main Methods:
- Hydrogels were formulated using methylcellulose, sECM, and CuSO4, characterized for physical and rheological properties.
- Endothelial progenitor cell (EPC) viability, phenotype, and proliferation were assessed in vitro.
- Therapeutic effects were evaluated in a magnet-induced ischemic pressure ulcer model, with macroscopic and histological analyses.
Main Results:
- The sECM and CuSO4 hydrogel exhibited favorable gelation, mechanical properties, and microstructure.
- Low-dose CuSO4 (0.1% w/v) supported EPC viability and proliferation, while higher doses were cytotoxic.
- In vivo, the hydrogel with EPCs significantly accelerated wound closure and enhanced tissue regeneration, including increased hair follicle density and collagen deposition.
Conclusions:
- The developed placental ECM-copper hydrogel incorporating EPCs demonstrates significant potential for pressure ulcer repair.
- This biomaterial approach effectively addresses multiple pathological aspects of pressure ulcers.
- The combination of structural support, pro-angiogenic factors, and cellular components offers a promising strategy for advanced wound care.
