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First ex vivo cultivation of human Demodex mites and evaluation of different drugs on mite proliferation.
Clanner-Engelshofen, B M; Ständer, L M; Steegmüller, T; Kämmerer, T; Frommherz, L H; Stadler, P-C; Gürtler, A; Reinholz, M.
Afiliación
  • Clanner-Engelshofen BM; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Ständer LM; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Steegmüller T; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Kämmerer T; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Frommherz LH; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Stadler PC; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Gürtler A; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
  • Reinholz M; Department of Dermatology and Allergy, University Hospital, Munich, Germany.
J Eur Acad Dermatol Venereol ; 36(12): 2499-2503, 2022 Dec.
Article en En | MEDLINE | ID: mdl-35881081
BACKGROUND: Demodex spp. mites are the most complex resident of the human skin microbiome. Although they are considered commensals, they can be pathophysiologically relevant in inflammatory skin diseases like rosacea. Until now, there is no culture system available for these mites except for using live vertebrate hosts. OBJECTIVES: Our aim was to establish an ex vivo culture of human Demodex mites and to characterize the sebogenesis-dependent mite density. METHODS: Demodex mites were cultivated in pilosebaceous units of human skin explants, called human organotypic skin explant culture (hOSEC). Furthermore, different sebogenesis-modifying additives were evaluated. Mites and mite survival were evaluated using light and fluorescence microscopy. RESULTS: After 90 days of incubation, living Demodex mites - including eggs, larvae and nymphs - were detected in the dissected skin samples. Incubation for 30 days with anabolic steroids (testosterone and trenbolone) as well as retinol and retinoic acid (isotretinoin) yielded a reduced mite density. CONCLUSIONS: With this technique, mites can be cultivated ex vivo for the first time, thereby establishing new ways to investigate Demodex spp. The sebostatic effect of isotretinoin might explain the mechanism of action in the off-label treatment of rosacea. We anticipate our findings to be the basis of an accelerated research on our most complex commensal, its life, biology and physiology.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rosácea / Infestaciones por Ácaros / Ácaros Límite: Animals / Humans Idioma: En Revista: J Eur Acad Dermatol Venereol Asunto de la revista: DERMATOLOGIA / DOENCAS SEXUALMENTE TRANSMISSIVEIS Año: 2022 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rosácea / Infestaciones por Ácaros / Ácaros Límite: Animals / Humans Idioma: En Revista: J Eur Acad Dermatol Venereol Asunto de la revista: DERMATOLOGIA / DOENCAS SEXUALMENTE TRANSMISSIVEIS Año: 2022 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido