title: Cosmeceutical effect on skin surface profiles and epidermis in UV-B-irradiated mice.
abstract: OBJECTIVE
  These data may be useful for developing guidelines for clinicians and the general population related to the reversal of photoaging effects on the aging face damaged by solar radiation.
  
  
  OBJECTIVE
  To investigate antiaging effects of 4 commercially available topical agents on the dorsal skin in photoaged hairless mice.
  
  
  METHODS
  Animal study at an academic medical center. Animals comprised 56 female Skh-1 hairless mice (6-8 weeks old). Skin samples were collected from nonirradiated intact mice (control), mice irradiated with UV-B for 8 weeks, mice irradiated with UV-B and then exposed to a topical cosmeceutical applied for 5 weeks, and UV-B-irradiated mice not exposed to cosmeceuticals and retained for 5 weeks until the end of the experiment.
  
  
  METHODS
  The mice were exposed to UV-B light 3 times a week for 2 months, followed by topical application of a peptide, antioxidant, estrogen, and retinoic acid agent for 5 weeks.
  
  
  METHODS
  Surface features such as wrinkling were analyzed from replicas along with histomorphometric determination of epidermal thickness, sebocyte counts, and immunohistochemical study of proliferating cell nuclear antigen (PCNA).
  
  
  RESULTS
  Exposure to UV-B induced significant wrinkle formation after 13 weeks, which was attenuated with treatments with a peptide cream, antioxidant mixture, and estrogen cream (mean [SD] Rz values: control [C], 60.7 [19.0]; irradiated [RAD], 51.8 [15.9] [P < .001]; irradiated-long [RAD-long], 86.0 [28.3] [P = .01]; antioxidant [AO], 45.2 [13.2]; peptide, 63.4 [18.8], estrogen, 64.6 [21.2]; retinoic acid [RA], 73.9 [28.5]; RAD-long vs C [P = .01], vs RAD [P < .001], vs estrogen [P = .04], vs peptide [P = .02], vs AO [P<.001], vs RA [P = .25]. There was a trend of reversal of irradiation-induced augmentation of epidermal thickness in animals treated with the peptide and AO (mean [SD] epidermal width: C, 21.0 [2.2] μm; RAD, 41.3 [7.0] μm [P < .001]; RAD-long, 39.1 [11.0] μm [P = .006]; AO, 37.3 [14] μm [P < .001]; peptide, 33.9 [3.8] μm [P = .01]; estrogen, 59.2 [9.2] μm [P = .003]; RA, 52.4 [8.7] μm [P < .001]). Retinoic acid augmented epidermal width and sebocyte counts (mean [SD] sebocyte data [number per gland]: C, 9.4 [2.0]; RAD, 11.69 [1.5] [P < .001]; RAD-long, 6.5 [1.3] [P = .73]; peptide, 7.2 [1.7] [P = .03]; estrogen, 4.1 [0.9] [P < .001]; AO, 7.2 [1.7] [P = .06]; RA, 11.0 [1.4] [P = .01]). Estrogen cream was effective in restoring surface features but enhanced thickness of epidermis in irradiated specimens. All groups had a higher PCNA index score except for peptide treatment, which brought it down to the control level (mean [SD] PCNA index values: C, 17.3 [1.5]; RAD, 32.4 [6.8] [P < .001]; RAD-long, 34.0 [6.1] [P < .001]; AO, 62.1 [3.5] [P = .01]; peptide, 20.1 [6.3] [P < .001]; estrogen, 56.8 [10.0] [P < .001]; RA, 35.2 [10.2] [P < .001]).
  
  
  CONCLUSIONS
  Of the 4 cosmeceuticals tested within this experimental period, peptide cream and antioxidant mixture were the most effective overall in reversing photoaging effects; retinoic acid was the least effective of these topical agents.
  
  
  METHODS
  NA.
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, University of Illinois at Chicago.
authors.forename: Tapan K
authors.initials: TK
authors.lastname: Bhattacharyya
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, University of Illinois at Chicago.
authors.forename: Mohini
authors.initials: M
authors.lastname: Pathria
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, University of Illinois at Chicago.
authors.forename: Clyde
authors.initials: C
authors.lastname: Mathison
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, University of Illinois at Chicago.
authors.forename: Maria
authors.initials: M
authors.lastname: Vargas
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, University of Illinois at Chicago.
authors.forename: J Regan
authors.initials: JR
authors.lastname: Thomas
mesh_terms: D000818:Animals; D003879:Dermatologic Agents / Q000494:pharmacology*; D004817:Epidermis / Q000187:drug effects* / Q000528:radiation effects*; D005260:Female; D051379:Mice; D008812:Mice, Hairless; D015595:Skin Aging / Q000187:drug effects* / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D003879:Dermatologic Agents