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Archives of Dermatological Research

, Volume 303, Issue 8, pp 591–600 | Cite as

Abnormal aquaporin-3 protein expression in hyperproliferative skin disorders

  • Kristen E. Voss
  • Roni J. Bollag
  • Nicole Fussell
  • Charya By
  • Daniel J. Sheehan
  • Wendy B. BollagEmail author
Original Paper

Abstract

Non-melanoma skin cancers (NMSCs) and psoriasis represent common hyperproliferative skin disorders, with approximately one million new NMSC diagnoses each year in the United States alone and a psoriasis prevalence of about 2% worldwide. We recently demonstrated that the glycerol channel, aquaporin-3 (AQP3) and the enzyme phospholipase D2 (PLD2) interact functionally in epidermal keratinocytes of the skin to inhibit their proliferation. However, others have suggested that AQP3 is pro-proliferative in keratinocytes and is upregulated in the NMSC, squamous cell carcinoma (SCC). To evaluate the AQP3/PLD2 signaling module in skin diseases, we determined their levels in SCC, basal cell carcinoma (BCC) and psoriasis as compared to normal epidermis. Skin biopsies with the appropriate diagnoses (10 normal, 5 SCC, 13 BCC and 10 plaque psoriasis samples) were obtained from the pathology archives and examined by immunohistochemistry using antibodies recognizing AQP3 and PLD2. In normal epidermis AQP3, an integral membrane protein, was localized mainly to the plasma membrane and PLD2 to the cell periphery, particularly in suprabasal layers. In BCC, AQP3 and PLD2 levels were reduced as compared to the normal-appearing overlying epidermis. In SCC, AQP3 staining was “patchy,” with areas of reduced AQP3 immunoreactivity exhibiting positivity for Ki67, a marker of proliferation. PLD2 staining was unchanged in SCC. In psoriasis, AQP3 staining was usually observed in the cytoplasm rather than in the membrane. Also, in the majority of psoriatic samples, PLD2 showed weak immunoreactivity or aberrant localization. These results suggest that abnormalities in the AQP3/PLD2 signaling module correlate with hyperproliferation in psoriasis and the NMSCs.

Keywords

Aquaporin-3 Basal cell carcinoma Epidermis Keratinocytes Phospholipase D2 Skin Skin cancer Squamous cell carcinoma 

Notes

Acknowledgments

This project was supported in part by a grant from the National Institutes of Health/National Institute of Arthritis, Musculoskeletal and Skin Diseases #AR45212. The authors thank Kimberly Smith and Doris Cawley in Georgia Research Pathology Services for preparing the sections and performing the Ki67 immunohistochemistry and the Medical College of Georgia Histology Core Facility for assistance with immunohistochemistry.

Conflict of interest

The authors declare that there are no conflicts of interest.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Kristen E. Voss
    • 2
  • Roni J. Bollag
    • 4
  • Nicole Fussell
    • 2
  • Charya By
    • 2
  • Daniel J. Sheehan
    • 4
    • 5
  • Wendy B. Bollag
    • 1
    • 2
    • 3
    • 5
    • 6
    Email author
  1. 1.Charlie Norwood VA Medical Center, One Freedom WayAugustaUSA
  2. 2.Institute of Molecular Medicine and GeneticsGeorgia Health Sciences University (formerly Medical College of Georgia)AugustaUSA
  3. 3.Department of PhysiologyGeorgia Health Sciences University (formerly Medical College of Georgia)AugustaUSA
  4. 4.Department of PathologyGeorgia Health Sciences University (formerly Medical College of Georgia)AugustaUSA
  5. 5.Department of Medicine (Dermatology)Georgia Health Sciences University (formerly Medical College of Georgia)AugustaUSA
  6. 6.Departments of Cell Biology and Anatomy and Orthopaedic SurgeryGeorgia Health Sciences University (formerly Medical College of Georgia)AugustaUSA

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