Occlusive hydrocolloid dressings decrease keratinocyte population growth fraction and clinical scale and skin thickness in active psoriatic plaques

Alice B. Gottlieb, Lisa Staiano-Coico, Steven R. Cohen, Matthew Varghese, D. Martin Carter

Research output: Contribution to journalArticle

28 Scopus citations


Clinical studies suggest a therapeutic role for occlusion in the treatment of psoriasis. Previous studies, using multiparameter RNA DNA flow cytometric analysis of epidermal suspensions obtained from active plaques, demonstrated increased keratinocyte growth fraction which reversed with successful medical treatment. Because keratinocyte growth fraction reflected disease activity, it was used in this study in addition to clinical evaluations in order to determine the efficacy of occlusion in the treatment of psoriatic plaques. In each of 9 patients, scale, skin thickness and erythema were compared in one occluded and one control plaque using an analog scale. Both scale and skin thickness, but not erythema, were decreased after 2 weeks of occlusion. However after 10 weeks, no additional differences were seen when compared with assessments made after 2 weeks, suggesting that the benefits of occlusive therapy occurred early. After 10 weeks of occlusion, the keratinocyte growth fraction was significantly decreased in occluded plaques. This study demonstrates that occlusion plays a synergistic role with other therapeutic modalities in ameliorating psoriatic plaques.

Original languageEnglish (US)
Pages (from-to)93-96
Number of pages4
JournalJournal of Dermatological Science
Issue number2
Publication statusPublished - Mar 1990
Externally publishedYes



  • Flow cytometry
  • Occlusion
  • Psoriasis

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Dermatology

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