Molecular, histologic, and gross phenotype of skin wound healing in red Duroc pigs reveals an abnormal healing phenotype of hypercontracted, hyperpigmented scarring.

Full Abstract

This study examined dermal wound healing in juvenile red Duroc pigs and determined that these animals exhibit a unique healing phenotype at multiple levels. Gross and histologic analysis revealed that full-thickness and deep dermal (1.8 mm deep) wounds both heal via formation of hypercontracted, hyperpigmented scars. Molecular analysis using reverse-transcriptase polymerase chain reaction and porcine-specific primer sets revealed that types I and III collagen, heat shock protein 47, bone morphogenetic protein-1, several proteoglycans, and tissue inhibitor of metalloproteinases 1-3 all showed a unique biphasic pattern of mRNA expression compared to previous results with Yorkshire pigs. This pattern was characterized by an initial peak of expression early after wounding, followed by a return to near-normal levels by days 28-42, and then a second increase in mRNA levels at days 56-70. The second phase of increased gene expression correlated with an increased collagen deposition as observed by picrosirius red staining and polarizing light microscopy. Reverse-transcriptase polymerase chain reaction analysis also revealed a prolonged expression of matrix metalloproteinase-2 compared to previous findings in the Yorkshire strain. Further characterization of the genetics and molecular biology associated with the red Duroc phenotype may provide insight into aberrant human wound healing.

Author information

Author/s: Gallant, Corrie L (CL); Olson, Merle E (ME); Hart, David A (DA);

Affiliation: Department of Surgery, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada T2N 4N1.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society (Wound Repair Regen), published in United States. (Language: eng)

Reference: -2004 May-Jun; vol 12 (issue 3) : pp 305-19

Dates: Created 2004/06/30; Completed 2004/11/23; Revised 2008/11/21;

PMID: 15225209, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Animals
Bone Morphogenetic Protein 1
Bone Morphogenetic Proteins - genetics
Cicatrix - genetics; pathology; physiopathology
Collagen Type I - genetics
Collagen Type III - genetics
Female
Gene Expression
Male

Matrix Metalloproteinase 2 - genetics
Metalloendopeptidases - genetics
Models, Animal
Phenotype
Proteoglycans - genetics
Skin - pathology; physiopathology
Swine
Tissue Inhibitor of Metalloproteinase-1 - genetics
Wound Healing - genetics; physiology

Associated Chemicals: Bone Morphogenetic Proteins (0) ; Collagen Type I (0) ; Collagen Type III (0) ; Proteoglycans (0) ; Tissue Inhibitor of Metalloproteinase-1 (0) ; Metalloendopeptidases (EC 3.4.24.-) ; BMP1 protein, human (EC 3.4.24.19) ; Bone Morphogenetic Protein 1 (EC 3.4.24.19) ; Matrix Metalloproteinase 2 (EC 3.4.24.24)

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