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ECM hydrogel for the treatment of stroke: Characterization of the host cell infiltrate

Paper ID Volume ID Publish Year Pages File Format Full-Text
5442 385 2016 16 PDF Available
Title
ECM hydrogel for the treatment of stroke: Characterization of the host cell infiltrate
Abstract

Brain tissue loss following stroke is irreversible with current treatment modalities. The use of an acellular extracellular matrix (ECM), formulated to produce a hydrogel in situ within the cavity formed by a stroke, was investigated as a method to replace necrotic debris and promote the infiltration of host brain cells. Based on magnetic resonance imaging measurements of lesion location and volume, different concentrations of ECM (0, 1, 2, 3, 4, 8 mg/mL) were injected at a volume equal to that of the cavity (14 days post-stroke). Retention of ECM within the cavity occurred at concentrations >3 mg/mL. A significant cell infiltration into the ECM material in the lesion cavity occurred with an average of ∼36,000 cells in the 8 mg/mL concentration within 24 h. An infiltration of cells with distances of >1500 μm into the ECM hydrogel was observed, but the majority of cells were at the tissue/hydrogel boundary. Cells were typically of a microglia, macrophage, or neural and oligodendrocyte progenitor phenotype. At the 8 mg/mL concentration, ∼60% of infiltrating cells were brain-derived phenotypes and 30% being infiltrating peripheral macrophages, polarizing toward an M2-like anti-inflammatory phenotype. These results suggest that an 8 mg/mL ECM concentration promotes a significant acute endogenous repair response that could potentially be exploited to treat stroke.

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Keywords
Biomaterial; Delivery; Extracellular matrix; Injection; Magnetic resonance imaging; Stereotactic; Brain; Stroke; Hydrogel; Phenotypes; Neural progenitor; Macrophage
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ECM hydrogel for the treatment of stroke: Characterization of the host cell infiltrate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 91, June 2016, Pages 166–181
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us