title: Lentiviral-mediated over-expression of hyaluronan synthase-1 (HAS-1) decreases the cellular inflammatory response and results in regenerative wound repair.
abstract: Fetal wounds have been found to have increased levels of high-molecular-weight hyaluronan (HMW-HA) compared with those of adults. The primary enzyme responsible for producing HMW-HA is hyaluronic acid synthase-1 (HAS-1). We hypothesized that over-expression of HAS-1 in adult dermal wounds would decrease inflammation and promote regenerative healing. To test this hypothesis, the flanks of adult C57Bl/6 mice were treated with a lentiviral construct containing either HAS-1-GFP or GFP transgenes. After 48 h, a 4-mm excisional wound was made at the site of treatment. Wounds were harvested at days 3, 7, or 28 after wounding. Wound phenotype was assessed by histology to examine tissue architecture and immunohistochemistry for CD45. At 7 and 28 days, lenti-HAS-1-treated wounds demonstrated the restoration of the normal dermal elements and organized collagen fiber orientation. In contrast, the lenti-GFP-treated wounds lacked normal dermal architecture and demonstrated a disorganized collagen scar. At 3 and 7 days, wounds treated with lenti-HAS-1 exhibited a significant decrease in the number of inflammatory cells when compared with wounds treated with lenti-GFP. Thus, HAS-1 over-expression promotes dermal regeneration, in part by decreasing the inflammatory response and by recapitulation of fetal extracellular matrix HMW-HA content.
authors.affiliation: Department of Surgery, University of Mississippi Medical Center, Jackson, MS, USA.
authors.forename: Robert C
authors.initials: RC
authors.lastname: Caskey
authors.forename: Myron
authors.initials: M
authors.lastname: Allukian
authors.forename: Robert C
authors.initials: RC
authors.lastname: Lind
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Herdrich
authors.forename: Junwang
authors.initials: J
authors.lastname: Xu
authors.forename: Antoneta
authors.initials: A
authors.lastname: Radu
authors.forename: Marc E
authors.initials: ME
authors.lastname: Mitchell
authors.forename: Kenneth W
authors.initials: KW
authors.lastname: Liechty
mesh_terms: D000818:Animals; D002452:Cell Count; D020405:Dermis / Q000473:pathology; D004195:Disease Models, Animal; D015870:Gene Expression; D014453:Glucuronosyltransferase / Q000235:genetics* / Q000378:metabolism; D000076002:Hyaluronan Synthases; D007150:Immunohistochemistry; D007249:Inflammation / Q000473:pathology*; D016086:Lentivirus / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D012038:Regeneration; D015203:Reproducibility of Results; D014162:Transfection; D014945:Wound Healing
chemical_list: D014453:Glucuronosyltransferase; D000076002:Hyaluronan Synthases