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A study of the pathogenesis of Rosacea: how angiogenesis and mast cells may participate in a complex multifactorial process

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Abstract

In the present study we evaluated, in involved and clinically uninvolved skin of Rosacea, microvessels density (MVD) and total vascular area (TVA) in addition to multiple morphologic characteristics of microvessels and also mast cells (MCs) number. We examined also the relationship between angiogenesis, MCs number and disease clinicopathological data. The study included 69 patients with Rosacea. A skin biopsy with a 4-mm punch was performed from clinically involved skin in each case. In nine randomly selected patients, facial biopsy specimens were obtained from both involved and clinically uninvolved skin. Histological sections, immunostained for factor VIII, were evaluated by image analysis for the quantification of MVD, TVA and several morphometric parameters related to the vessel size or shape. MCs detection in the dermis was carried out using the chloracetate esterase method (Fast Blue RR) in parafin sections. Serum antibodies against H.pylori were detected. Statistically important differences concerning the factors of angiogenesis between lesional and clinically non-lesional skin were demonstrated. A statistical important correlation was found also between high vascular density, PPR clinical type and the presence of ocular manifestations. MVD or TVA showed no correlation with the degree of solar elastosis or inflammation and with the Demodex density as well. However, high MVD values were found to correlate with granuloma formation in the dermis. MCs number were significantly greater in lesional compared to clinically non-lesional skin. Statistical significance was shown between MCs density and disease duration. However, no correlation between MCs number and blood vessel density was found. Angiogenesis seems to play an important role in the pathogenesis especially of the more severe clinical form of Rosacea. MCs seem to participate in evolution to disease chronicity by contributing to inflammation, angiogenesis and tissue fibrosis.

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Authors and Affiliations

  1. Department of Dermatopathology, Medical School, University of Athens, 75 Mikras Asias str., 115 27, Athens, Greece

    Kyriaki Aroni, Eugenia Tsagroni, Nikolaos Kavantzas, Efstratios Patsouris & Eleftherios Ioannidis

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  1. Kyriaki Aroni
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  2. Eugenia Tsagroni
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  3. Nikolaos Kavantzas
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  4. Efstratios Patsouris
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  5. Eleftherios Ioannidis
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Correspondence to Nikolaos Kavantzas.

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Aroni, K., Tsagroni, E., Kavantzas, N. et al. A study of the pathogenesis of Rosacea: how angiogenesis and mast cells may participate in a complex multifactorial process. Arch Dermatol Res 300, 125–131 (2008). https://doi.org/10.1007/s00403-007-0816-z

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  • DOI: https://doi.org/10.1007/s00403-007-0816-z

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