Frade MAC, Andrade TAMD, Aguiar AFCL, Guedes FA, Leite MN, Passos WR, Coelho EB, Das PK. Prolonged viability of human organotypic skin explant in culture method (hOSEC).
An Bras Dermatol 2015;
90:347-50. [PMID:
26131864 PMCID:
PMC4516099 DOI:
10.1590/abd1806-4841.20153645]
[Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 07/31/2014] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND:
Currently, the cosmetic industry is overwhelmed in keeping up with the safety
assessment of the increasing number of new products entering the market. To meet
such demand, research centers have explored alternative methods to animal testing
and also the large number of volunteers necessary for preclinical and clinical
tests.
OBJECTIVES:
This work describes the human skin ex-vivo model (hOSEC: Human Organotypic Skin
Explant Culture) as an alternative to test the effectiveness of cosmetics and
demonstrate its viability through cutaneous keratinocytes' proliferative capacity
up to 75 days in culture.
METHODS:
The skin explants obtained from surgeries were cultured in CO2-humid
incubator. After 1, 7, 30 and 75 days in culture, skin fragments were harvested
for analysis with histomorphological exam (HE staining) on all days of follow-up
and immunohistochemistry for Ck5/6, Ck10 and Ki-67 only on the 75th day.
RESULTS:
On the 7th day, the epidermis was perfect in the dermoepidermal junction, showing
the viability of the model. On the 30th day, the epidermis was thicker, with fewer
layers on the stratum corneum, although the cutaneous structure was unaltered. On
the 75th day, the skin became thinner but the dermoepidermal junctions were
preserved and epidermal proliferation was maintained. After the 75th day on
culture, the skin was similar to normal skin, expressing keratinocytes with Ck5/6
on supra-basal layers; Ck10 on differentiated layers; and viability could be
assessed by the positivity of basal cells by Ki-67.
CONCLUSION:
The hOSEC model seems a good alternative to animal testing; it can be used as a
preclinical test analogous to clinical human skin test with similar effectiveness
and viability proven by immunohistological analyses.
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