title: Effect of the 1,450 nm diode non-ablative laser on collagen expression in an artificial skin model.
abstract: OBJECTIVE
  The 1,450-nm Smoothbeam Laser is a diode laser equipped with a cryogen cooling spray. Primary objectives were to evaluate the effects of this non-ablative laser on Apligraf (bioengineered skin-substitute) and to document its use as a model for non-ablative procedures. We also measured the effects of laser fluence levels on collagen and elastin expression.
  
  
  METHODS
  Three sheets of Apligraf were used for this study. Each received six separate laser applications at 4J, 6J, 8J, 10 J, 12J, and 14J. The sheets were then incubated with 10% CO(2) at 37 degrees C and samples were collected and analyzed 3 days later, using RT-PCR and immunofluorescent staining.
  
  
  RESULTS
  Collagen III expressions significantly increased in both mRNA and protein levels at approximately 12 J.
  
  
  CONCLUSIONS
  There appears to be a threshold effect where there is very little increased collagen III mRNA and protein expression until the laser fluence reaches around 12J.
authors.affiliation: Department of Dermatology and Cutaneous Surgery, University of Miami School of Medicine, 1475 NW 12th Avenue, Room 2175, Miami, FL 33136, USA. knouri@med.miami.edu
authors.forename: Keyvan
authors.initials: K
authors.lastname: Nouri
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Zhang
authors.forename: Lauren
authors.initials: L
authors.lastname: Singer
authors.forename: Linjian
authors.initials: L
authors.lastname: Zhu
authors.forename: Ran
authors.initials: R
authors.lastname: Huo
authors.forename: Carlos
authors.initials: C
authors.lastname: Ricotti
authors.forename: Srdjan
authors.initials: S
authors.lastname: Prodanovich
authors.forename: Jie
authors.initials: J
authors.lastname: Li
mesh_terms: D003094:Collagen / Q000096:biosynthesis* / Q000378:metabolism / Q000528:radiation effects; D006801:Humans; D007231:Infant, Newborn; D028022:Low-Level Light Therapy / Q000379:methods*; D008954:Models, Biological; D017768:Skin, Artificial
chemical_list: C117898:Apligraf; D003094:Collagen