Hyperbaric oxygen treatment prevents up-regulation of angiogenesis following partial-thickness skin grafts in the pig.
We hypothesized that hyperbaric oxygen treatment (HBO) would reduce neovascularization following partial-thickness skin grafting in the Yucatan pig. Results show that capillary density 4 days post-graft is increased twofold in grafts not treated with HBO, compared to normal, ungrafted skin or skin grafts from pigs treated with HBO, p < 0.05. Similarly, the expression of vascular endothelial growth factor, a growth factor associated with neovascularization, was also reduced by HBO. Cell density in the graft boundary increased gradually after grafting, reaching a maximum 2.7-fold increase, relative to normal skin, at day 4, p < 0.05. Cell nuclei positive for proliferating cell nuclear antigen, a marker of proliferation, increased threefold by day 2, p < 0.05, and then declined to normal levels by day 7. HBO had no effect on cell density or proliferation in the boundary region or on shear strength of the graft. In the epidermis, proliferation declined 80% 2 days after grafting and then returned to levels observed in normal skin by day 4, p < 0.05; however, in pigs treated with HBO, we observed no decline in proliferation. These findings confirm the hypothesis that HBO reduces neovascularization in the partial-thickness skin graft while preserving regenerative capacity in the graft boundary and normal proliferative capacity of the epidermis.
Kalns
John E
JE
US Air Force School of Aerospace Medicine, Brooks AFB, Texas 78235, USA.
Dick
Edward J
EJ
Scruggs
Julie P
JP
Kieswetter
Kris
K
Wright
Jim K
JK
D000818:Animals; D002455:Cell Division / Q000187:drug effects; D016228:Endothelial Growth Factors / Q000096:biosynthesis; D006931:Hyperbaric Oxygenation; D036341:Intercellular Signaling Peptides and Proteins / Q000096:biosynthesis; D008222:Lymphokines / Q000096:biosynthesis; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D016038:Skin Transplantation / Q000379:methods*; D013552:Swine; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
D016228:Endothelial Growth Factors; D036341:Intercellular Signaling Peptides and Proteins; D008222:Lymphokines; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors